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Takeshi Okuyama

Section

Graduate School of Engineering

Job title

Associate Professor

Degree

博士（工学）（東北大学）
修士（工学）（東北大学）

researchmap

https://researchmap.jp/7000010843

J-GLOBAL ID

201501049017023998

Research History 1

2006/04 - 2007/03

Central Research Institute of Electric Power Industry　Collaborating Researcher

Education 3

Tohoku University　Graduate School of Engineering　Department of Bioengineering and Robotics

2003/04 - 2006/03
Tohoku University　Graduate School of Engineering　Department of Mechatronics and Precision Engineering

2001/04 - 2003/03
Nagoya University　Faculty of Engineering　Mechanical and Aerospace Engineering

1997/04 - 2001/03

Professional Memberships 6

THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS
精密工学会
日本生体医工学会
バイオメカニズム学会
日本ＡＥＭ学会
the Japan Society of Mechanical Engineers

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Research Interests 6

Human motion control
Smart material
Tactile sensation measurement
Human sensing
wearable sensor
Human motion measurement

Research Areas 5

Life sciences / Medical systems /
Informatics / Mechanics and mechatronics /
Informatics / Robotics and intelligent systems /
Life sciences / Biomaterials /
Life sciences / Biomedical engineering /

Awards 7

情報・知能・精密機器部門ベストプレゼンテーション表彰

2024/03　日本機械学会情報・知能・精密機器部門　触診位置情報取得システムを組み込んだ手動型乳房触診センサシステムの開発
SI2022優秀講演賞

2023/03　計測自動制御学会システムインテグレーション部門　二重シートを用いた硬内在物を持つ柔軟物体の提示装置の開発
SI2018優秀講演賞

2019/03　SICE System integration division　Study on the mechanism of hardness sensation by focusing on contact area
日本機械学会情報・知能・精密機器部門優秀講演論文賞

2017/03/14　日本機械学会　ウェアラブル指先力計測センサシステムの開発
日本機械学会奨励賞（研究）

2012/04/20　日本機械学会　「機能性材料の機能性評価と医療福祉機器への応用の研究」
日本AEM学会奨励賞

2010/11/22　日本AEM学会　A curvature sensor using a solid polymer electrolyte
第17回MAGDAコンファレンス優秀講演論文賞

2008/11/21　日本ＡＥＭ学会

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Papers 119

Heart rate-related physiological changes induced by classical music-elicited emotions do not underlie alterations in healthy adults' ankle joint target-matching strategy. International-journal Peer-reviewed

Keqing Yuan, Takeshi Okuyama, Tibor Hortobágyi, Ryoichi Nagatomi, János Négyesi

Scientific reports　14　(1)　16482-16482　2024/07/17

DOI： 10.1038/s41598-024-67467-y 　

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Emotions have the potential to modulate human voluntary movement by modifying muscle afferent discharge which in turn may affect kinesthetic acuity. We examined if heart rate (HR)-related physiological changes induced by music-elicited emotions would underlie alterations in healthy young adults' ankle joint target-matching strategy quantified by joint position sense (JPS). Participants (n = 40, 19 females, age = 25.9 ± 2.9 years) performed ipsilateral-, and contralateral ankle target-matching tasks with their dominant and non-dominant foot using a custom-made foot platform while listening to classical music pieces deemed to evoke happy, sad, or neutral emotions (each n = 10). Participants in the 4th group received no music during the task. Absolute (ABS), constant (CONST), and variable (VAR) target-matching errors and HR-related data were analyzed. Participants performed the contralateral target-matching task with smaller JPS errors when listening to sad vs. happy music (ABS: p < 0.001, d = 1.6; VAR: p = 0.010, d = 1.2) or neutral (ABS: p < 0.001, d = 1.6; VAR: p < 0.001, d = 1.4) music. The ABS (d = 0.8) and VAR (d = 0.3) JPS errors were lower when participants performed the task with their dominant vs. non-dominant foot. JPS errors were also smaller during the ipsilateral target-matching task when participants (1) listened to sad vs. neutral (ABS: p = 0.007, d = 1.2) music, and (2) performed the target-matching with their dominant vs. non-dominant foot (p < 0.001, d = 0.4). Although emotions also induced changes in some HR-related data during the matching conditions, i.e., participants who listened to happy music had lower HR-related values when matching with their non-dominant vs. dominant foot, these changes did not correlate with JPS errors (all p > 0.05). Overall, our results suggest that music-induced emotions have the potential to affect target-matching strategy and HR-related metrics but the changes in HR-metrics do not underlie the alteration of ankle joint target-matching strategy in response to classical music-elicited emotions.
Evaluation of a robotic palpation sensor system for prostate cancer screening on silicone elastomers and prostate phantoms Peer-reviewed

Francis Chikweto, Takeshi Okuyama, Mami Tanaka

Journal of Advanced Mechanical Design, Systems and Manufacturing　17　(2)　2023

DOI： 10.1299/jamdsm.2023jamdsm0021 　

eISSN： 1881-3054
MEASUREMENT OF FINGERTIP MECHANICAL PROPERTIES BY OPTICAL COHERENCE TOMOGRAPHY FOR ANALYSIS OF INDIVIDUAL DIFFERENCES IN ROUGHNESS TACTILE PERCEPTION

Shota Kawaminami, Takahiro Hara, Takeshi Okuyama, Mami Tanaka

Extended abstract of 2022 JSME-IIP/ASME-ISPS Joint International Conference on Micromechatronics for Information and Precision Equipment (MIPE2022)　2022/08
STUDY ON THE DEVELOPMENT OF A WEARABLE BRAILLE READING SENSOR SYSTEM BY FINGER VIBRATION MEASUREMENT

Haruka Mitsugi, Takeshi Okuyama, Mami Tanaka

Extended abstract of 2022 JSME-IIP/ASME-ISPS Joint International Conference on Micromechatronics for Information and Precision Equipment (MIPE2022)　2022/08
STUDY ON ESTIMATION OF SKIN SCRATCH INTENSITY BY SCRATCH SOUND ANALYSIS

Takeshi Okuyama, Mami Tanaka

Extended abstract of 2022 JSME-IIP/ASME-ISPS Joint International Conference on Micromechatronics for Information and Precision Equipment (MIPE2022)　2022/08
Robot-Assisted Prostate Cancer detection: A validation study on prostate phantoms

Chikweto Francis, Takeshi Okuyama, Mami Tanaka

Extended abstract of 2022 JSME-IIP/ASME-ISPS Joint International Conference on Micromechatronics for Information and Precision Equipment (MIPE2022)　2022/08
A cable driven robotic palpation system with contact force sensing based on cable tension observation. International-journal Peer-reviewed

Chikweto Francis, Taiga Sato, Takeshi Okuyama, Mami Tanaka

The international journal of medical robotics + computer assisted surgery : MRCAS　e2435　2022/06/21

DOI： 10.1002/rcs.2435 　

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BACKGROUND: Prostate Cancer screening based on manual palpation is subjective. Robotic palpation systems can objectively acquire stiffness conditions of the prostate. METHODS: A 2DoF cable driven robotic system for prostate palpation is proposed. An indirect method to estimate the contact force based on cable tension observation is presented. Kinematic models and a joint angle estimation method to determine the tip position of the probe are derived. Positioning accuracy was verified using an optical marker tracking system and by displacement measurement, respectively. The contact force estimation method was validated on silicone phantom samples. RESULTS: A good consistence between the estimated and measured contact force was observed. The contact force was correlated with the elastic modulus of each silicone phantom. There was also a good agreement between the theoretical and the measured tip position. CONCLUSION: In the proposed palpation system, the indirect contact force estimation method is viable and holds potential for the stiffness assessment of the prostate. The tip position vital for palpation can be determined through estimated joint angles.
Mechanical modeling of a ring-type fingertip force sensor Peer-reviewed

Takeshi Okuyama, Tomoki Sugimoto, Mami Tanaka

Conference Proceedings - IEEE International Conference on Systems, Man and Cybernetics　2022-October　1718-1723　2022

DOI： 10.1109/SMC53654.2022.9945291 　

ISSN： 1062-922X
A roller scanning type prostate palpation sensor system using a cantilever beam type force measurement International-journal Peer-reviewed

Francis Chikweto, Takeshi Okuyama, Mami Tanaka

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS　2022-July　4387-4390　2022

DOI： 10.1109/EMBC48229.2022.9870835 　

ISSN： 1557-170X
Development of a tendon driven robotic probe for prostate palpation. International-journal Peer-reviewed

Francis Chikweto, Takeshi Okuyama, Mami Tanaka

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference　2021　1330-1335　2021/11

DOI： 10.1109/EMBC46164.2021.9630059 　

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Palpation is a clinical diagnosis method utilized by physicians to acquire valuable information about the pathological condition of an organ using the sense of touch. This method, however, is subjective. The accuracy depends on the physician's experience and skill. Therefore, to make palpation objective and minimize variability in prostate cancer diagnosis among physicians, an automated palpation system is required. This paper describes the design and experimental evaluation of a 2 Degrees of Freedom (2DoF) tendon driven robotic palpation probe. The probe's palpation motion is controlled by actuating driving tendons using a cable-differential pulley transmission system and a return spring. A kinematic model of the robotic probe was derived. Furthermore, a tendon path length model was geometrically determined, and an optimization method for guide arc center placement to minimize change in tendon length was presented. Preliminary experimental and theoretical results were compared to determine the positioning accuracy. The difference between theoretical pitch angles [0°,80°] and measured values for the yaw angle range of [0°, 40°] was found to be in the range of 0.03° ~ 5.06°.Clinical Relevance- Diagnosis based on manual palpation is often subjective and palpation sensitivity depends on the physician's level of experience and skill. Therefore, an objective method for acquiring tactile information is relevant. Robotic palpation system provides objective and quantitative information for better understanding of the pathological and physiological changes in the tissue using mechanical properties as biomarkers.
Measurement of Young’s Modulus of Stratum Corneum in Finger by Optical Coherence Tomography Peer-reviewed

奥山武志, 庭田涼平, 田中真美

日本AEM学会誌　29　(1)　2021

ISSN： 0919-4452
Study on Tactile Evaluation for Wood Grain Pattern Created by Resin Printing Peer-reviewed

奥山武志, 高橋謙一, 鈴木健太, 西村進一, 白坂剛, 下村尚登, 田中真美

日本AEM学会誌　29　(1)　2021

ISSN： 0919-4452
Study on tactile illusion of stiffness feeling by surface roughness Peer-reviewed

KANG Semin, OKUYAMA Takeshi, TANAKA Mami, FLORIAN Ramousse, THIEULIN Coralie, ZAHOUANI Hassan, PAILLER-MATTEI Cyril

Journal of Advanced Science　32　n/a　2020
Publisher: Society of Advanced Science
DOI： 10.2978/jsas.32302 　

ISSN： 0915-5651

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In this study, we focus on the tactile illusion of stiffness feeling by surface roughness. Human factors on tactile illusion is analyzed from the viewpoint of the fingertip stiffness and finger motion. Specifically, five types of samples with different surface roughness are fabricated. Sensory evaluations for the stiffness feeling and the roughness feeling are conducted. Also, the fingertip stiffness and fingertip force when the panelists touch the samples are measured. As a result, it is confirmed that tactile illusion on stiffness due to surface roughness occurs to some panelists. And it is shown that the tactile illusion is less likely to occur in panelists with hard fingertips. Moreover, the panelists with tactile illusion are classified into two groups based on the relationship between the surface roughness and the stiffness feeling. And it is suggested that each group has characteristics in the relationship between the touch motion and fingertip stiffness.
Tactile sensor for measuring hardness and viscosity by using a bimorph piezoelectric array Peer-reviewed

Hiroshi Nagai, Takeshi Okuyama, Mami Tanaka

International Journal of Applied Electromagnetics and Mechanics　64　(1-4)　1103-1110　2020

DOI： 10.3233/JAE-209426 　

ISSN： 1383-5416
Study on detection of lumps in a soft object by using a scanning roller type palpation sensor system Peer-reviewed

Taku Wakayama, Takeshi Okuyama, Mami Tanaka

International Journal of Applied Electromagnetics and Mechanics　64　(1-4)　745-752　2020

DOI： 10.3233/JAE-209386 　

ISSN： 1383-5416
Measurement system of swallowing motion by using a piezoelectric film sensor Peer-reviewed

Yusuke Kurishima, Hirokazu Hashimoto, Takeshi Okuyama, Mami Tanaka

International Journal of Applied Electromagnetics and Mechanics　64　(1-4)　1173-1182　2020

DOI： 10.3233/JAE-209434 　

ISSN： 1383-5416
Position of compression garment around the knee affects healthy adults' knee joint position sense acuity. Peer-reviewed

Zhang LY, Négyesi J, Okuyama T, Tanaka M, Hortobágyi T, Nagatomi R

Human movement science　67　102519　2019/09

DOI： 10.1016/j.humov.2019.102519 　

ISSN： 0167-9457

eISSN： 1872-7646
Study on fingertip force sensor based on measurement of tendon tension Peer-reviewed

Okuyama Takeshi, Kobayashi Kouhei, Tanaka Mami

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　59　(3)　1119-1126　2019

DOI： 10.3233/JAE-171143 　

ISSN： 1383-5416
The effect of surface roughness on human stiffness feeling Peer-reviewed

Kang Semin, Okuyama Takeshi, Tanaka Mami

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　59　(3)　1103-1110　2019

DOI： 10.3233/JAE-171028 　

ISSN： 1383-5416
Human scratching motion analysis method by using three-dimensional motion measurement system Peer-reviewed

Watanabe Keisuke, Abe Takao, Isozaki Goushiro, Okuyama Takeshi, Tanaka Mami

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　59　(3)　1111-1118　2019

DOI： 10.3233/JAE-171181 　

ISSN： 1383-5416
Softness measurement system for biological object by using balloon catheter Peer-reviewed

Saito Sho, Okuyama Takeshi, Tanaka Mami

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　59　(3)　1127-1134　2019

DOI： 10.3233/JAE-171135 　

ISSN： 1383-5416
Development of Ball Roller Scanning Type Palpation Sensor System

Mami TANAKA, Jin OIZUMI, Takeshi OKUYAMA

Proceedings of 18th International Symposium on Applied Electromagnetics and Mechanics　2017/08
柔軟物に対する軟骨感評価時の指先接触状態の計測に関する研究

渡邉慎也, 奥山武志, 田中真美

IIP2017情報・知能・精密機器部門講演論文集CD(F7)　2017/03/14

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IIP2017情報・知能・精密機器部門講演会、2017年3月14～15日、東洋大学（東京）
Hardness Measurement by Using the Bimorph Sensor Unit Peer-reviewed

NAGAI Hiroshi, OKUYAMA Takeshi, TANAKA Mami

Journal of the Japan Society of Applied Electromagnetics and Mechanics　25　(2)　242-246　2017
Publisher: The Japan Society of Applied Electromagnetics and Mechanics
DOI： 10.14243/jsaem.25.242 　

ISSN： 0919-4452

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We focus on the hardness measurement by using a sensor unit arranging 8 piezoelectric elements in series. In previous study, it confirmed that the sensor unit is available to evaluate roughness on the sample. In the study, four silicone samples with different Young's modulus were prepared. In experiments, the sensor unit was placed on the sample and moved up and down with 1Hz. And the oscillatory waveform form each piezoelectric element was obtained. In analysis, the first peak voltage in the waveform were extracted and compared with the Young's modulus of the sample. From the results, it was found that the peak voltage related on Young's modulus. It was suggested that the sensor unit is available to evaluate the hardness of objects.
Hardness measurement by using the bimorph sensor unit

長井裕, 奥山武志, 田中真美

第25回 MAGDAコンファレンス in Kiryu　484-489　2016/11/24

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2016年11月24～25日、桐生（群馬）
Measurement of palpation motion using prostate examination simulator and motion capture system Peer-reviewed

Takeshi Okuyama, Shota Yokoyama, Yoshikatsu Tanahashi, Mami Tanaka

Mechanical Engineering Journal　3　(1)　15-00539-00539-15-00539　2016/02/15
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/mej.15-00539 　

ISSN： 2187-9745

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In this paper, palpation motions for prostate gland were measured using a prostate examination simulator and motion capture system in order to clarify effective motions for accurate diagnosis. It is difficult for students to learn how to make a palpation motion and what information to obtain during palpation. Quantitative evaluation of palpation motion is demanded. Firstly, the prostate examination simulator was developed and six kinds of prostate models, including a healthy model, a cancer model, and a hypertrophy model, were prepared as palpation samples. Next, by using these measurement system, prostate palpation motions by a expert and five students were measured. While participants diagnose the presence of lumps in prostate models and the size of prostate, fingertip position and force applying on prostate models were measured. From the results, it was confirmed that the expert diagnosed the state of prostate glands more accurately. Then motion analyses for trajectory of fingertip, contact force, and finger posture were carried out and motion characteristics between the expert and students were compared. From these results about both of trajectory and contact force, and it was found that the expert commonly explored over the whole of models by relative larger contact force than students do, it was suggested that the expert simultaneously explores presence of lumps and the shape of prostate. And from the results of analysis on finger posture, it was found that palpating the entire prostate with the fingertip is effective. As a results, the motion characteristics of the expert were extracted by using the developed system.
Measurement of finger joint angle using a flexible polymer sensor Peer-reviewed

Takeshi Okuyama, Kohei Kobayashi, Manabu Otsuki, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　52　(3-4)　951-957　2016

DOI： 10.3233/JAE-162091 　

ISSN： 1383-5416

eISSN： 1875-8800
Development of a sensor for measuring tactile sensation of hair by using artificial hair Peer-reviewed

Minori Kakizawa, Tomoyuki Kawasoe, Sho Otsuka, Mami Tanaka, Takeshi Okuyama, Takafumi Kono, Atsushi Horihata

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　52　(3-4)　917-925　2016

DOI： 10.3233/JAE-162107 　

ISSN： 1383-5416

eISSN： 1875-8800
Reciprocating Roller Scanning Type Palpation Sensor System for Evaluating Mobility of Lumps.

Mami Tanaka, Takeshi Okuyama, Tetsuharu Ube

The 17th International Symposium on applied Electromagnetics and Mechanics(ISEM2015),　2015/09/15
Frequency response of polymer sensor for measuring finger scratching motion Peer-reviewed

Takeshi Okuyama, Kazuki Hatakeyama, Mami Tanaka

Journal of the Japan Society of Applied Electromagnetics and Mechanics　23　(3)　618-623　2015/09/10

DOI： 10.14243/jsaem.23.618 　
様々な硬さの柔軟物を計測可能な小型硬さセンサの開発に関する研究

Development of the compact hardness sensor for sensing, various hardness of soft objects

2015年度精密工学会秋季大会、プログラム＆アブストラクト集　37-37　2015/09/04
指先力計測用ウェアラブルセンサの開発に関する研究

小林晃平, 奥山武志, 田中真美

Study on development of wearable sensor for finger force measurements　45-45　2015/09/04
Development of a Robot Finger System for Palpation of Prostate

岡前雄大, 奥山武志, 田中真美

2015年度精密工学会秋季大会、プログラム＆アブストラクト集　46-46　2015/09/04
USABILITY EVALUATION OF COMPACT BRAILLE READING SENSOR

Mami Tanaka, Asuka Sakaguchi, Takeshi Okuyama

2015 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　2015/06

DOI： 10.1299/jsmemipe.2015._TuD-1-4-1 　
Study on the measurement of palpation motion for prostate gland using 3D motion capture system

奥山武志, 横山翔太, 棚橋善克, 田中真美

第27回「電磁力関連のダイナミクス」シンポジウム（SEAD27）講演論文集　387-391　2015/05/14
Study on an Evaluation of Human Scratching Motion by Measuring Scratch Sounds Peer-reviewed

Takeshi Okuyama, Kazuki Hatakeyama, Mami Tanaka

Journal of the Japan Society of Applied Electromagnetics and Mechanics　23　(1)　80-85　2015/03/10
Publisher: The Japan Society of Applied Electromagnetics and Mechanics
DOI： 10.14243/jsaem.23.80 　

ISSN： 0919-4452

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Itch is an unpleasant sensation associated with various disease, and can trigger scratching. Management of itch and scratching is important for treatment of disease. Therefore, quantitative and objective evaluation of itch and scratching is demanded. This work aims to develop the sensor system for evaluating the scratching motion. For the purpose, we focus on scratch sounds induced by scratching motion and, propose a nail mounted sensor system . In the sensor system a small microphone is attached on a nail for measuring scratching sounds. First, for investigating the relationship between the scratch sounds and the mechanical characteristics of human scratch motion, the artificial skin model made of polyurethane was used as a scratched object. The measurement system that can measure force and a motion of fingertip during scratching was constructed. Using the measurement system, various kinds of human scratch motions and sounds were measured. By signal processing of the scratch sounds, the several sound features were calculated and characteristics of scratch motions were extracted. Then, correlation coefficients between sound features and scratch motion properties were calculated. From the results, two pairs of the parameters were found as the most adequate parameter pair to evaluate the mechanical characteristics of human scratch motion. And using these parameters, "scratch evaluation map" was proposed as a method to evaluate the mechanical characteristics of human scratch motion. From the results, it was found that the developed sensor system has possibility to evaluate the mechanical characteristics of human scratch motion by the scratch sounds.
Estimation of Crural Muscle States by Multipoint Mechanomyogram

Shohei Ikeda, Tetsuya Arai, Takeshi Okuyama, Mami Tanaka

Abstracts of 8th Asia-Pacific Symposium on Applied Electromagnetics and Mechanics　39-40　2014/07
Measurement on palpation motions for discriminating lump shapes

田中真美, 横山翔太, 奥山武志, 棚橋善克

日本AEM学会第26回「電磁力関連のダイナミクス」シンポジウム講演論文集　22Ba3　501-504　2014/05/21
Analysis of the pressure on the fingers and palms of midwife during second stage of labor Peer-reviewed

Miu Kudo, Maki Hojo, Takeshi Okuyama, Toyoko Yoshizawa, Fumi Atogami, Yasuka Nakamura, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　45　(1-4)　717-722　2014

DOI： 10.3233/JAE-141898 　

ISSN： 1383-5416

eISSN： 1875-8800
Measurement of human scratch behavior using compact microphone Peer-reviewed

Takeshi Okuyama, Kazuki Hatakeyama, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　45　(1-4)　731-737　2014

DOI： 10.3233/JAE-141900 　

ISSN： 1383-5416

eISSN： 1875-8800
Haptic perception mechanism of softness - second report, relationship between stiffness of an object and softness sensation Peer-reviewed

Daisuke Tsuchimi, Kana Sasaki, Takeshi Okuyama, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　45　(1-4)　787-792　2014

DOI： 10.3233/JAE-141907 　

ISSN： 1383-5416

eISSN： 1875-8800
Study on a roller scanning type palpation sensor Peer-reviewed

Mami Tanaka, Makoto Tamura, Takeshi Okuyama

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　45　(1-4)　723-729　2014

DOI： 10.3233/JAE-141899 　

ISSN： 1383-5416

eISSN： 1875-8800
DEVELOPMENT OF A HAPTIC SENSOR SYSTEM FOR QUANTIFYING TACTILE IMPRESSION OF HAIR Peer-reviewed

Minori Kakizawa, Naruhito Toyoda, Tomoyuki Kawasoe, Sho Otsuka, Takeshi Okuyama, Mami Tanaka, Takafumi Kono, Atsushi Horihata

2013 PROCEEDINGS OF SICE ANNUAL CONFERENCE (SICE)　1657-1662　2013

ISSN： 1550-0322
Fundamental characterization of diaper friction by disposable diapers

Takuya Nomata, Takeshi Okuyama, Mami Tanaka

Proceeding of the 2012 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　17-19　2012/06
Measurement of contact stimulus by disposable diapers considering motion of infants

Yuta Iseki, Takuya Nomata, Takeshi Okuyama, Mami Tanaka

Proceeding of the 2012 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　26-28　2012/06
Measurement of midwife motion during second stage of labor

Maki Hojo, Takeshi Okuyama, Toyoko Yoshizawa, Fumi Atogami, Yasuka Nakamura, Mami Tanaka

Proceeding of the 2012 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　32-34　2012/06
Development of bending sensor for monitoring of scratch motion using polymer sensor

Takeshi Okuyama, Kazuki Hatakeyama, Manabu Otsuki, Mami Tanaka

Proceeding of the 2012 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　38-39　2012/06
Measurement of Vibration Induced By Scratch Motion Peer-reviewed

畠山一樹, 奥山武志, 田中真美

Symposium on Electromagnetics and Dynamics(SEAD24))　609-610　2012/05/16

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2012年5月16～18日、富山国際会議場(The 24th Symposium on Electromagnetics and Dynamics(SEAD24))、609-610 pp.
Development of scanning tactile sensor of scanning Peer-reviewed

田中真美, 田村誠, 奥山武志

The 24th Symposium on Electromagnetics and Dynamics(SEAD24))　611-612　2012/05/16

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2012年5月16～18日、富山国際会議場(The 24th Symposium on Electromagnetics and Dynamics(SEAD24)) 、611-612 pp.
Measurement of Assisted Delivery Motion Peer-reviewed

奥山武志, 北條真紀, 吉沢豊子, 田中真美

The 24th Symposium on Electromagnetics and Dynamics(SEAD24)　613-614　2012/05/16

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2012年5月16～18日、富山国際会議場(The 24th Symposium on Electromagnetics and Dynamics(SEAD24)) 、613-614 pp.
Study on the measurement of human scratch motion using nail mounted sensor

Takeshi Okuyama, Kazuki Hatakeyama, Mami Tanaka

Book of Abstract, 9th International workshop on piezoelectric materials and applications in actuators　127　2012/04
Mechanism of Haptic Perception: Influence of Amplitude and Frequency for Smoothness

Mami Tanaka, Daisuke Tsuchimi, Takeshi Okuyama

Proceedings of the Tohoku University Global Center of Excellence Programme,　368-377　2012

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In Takami Yamaguchi (ED.), NANO-BIOMEDICAL ENGINEERING 2012 :
Time response properties on deformation velocity for a solid polymer electrolyte sensor Peer-reviewed

Manabu Otsuki, Takeshi Okuyama, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　39　(1-4)　1063-1068　2012

DOI： 10.3233/JAE-2012-1579 　

ISSN： 1383-5416
Haptic perception mechanism of softness Peer-reviewed

Daisuke Tsuchimi, Takeshi Okuyama, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　39　(1-4)　1041-1046　2012

DOI： 10.3233/JAE-2012-1576 　

ISSN： 1383-5416
Evaluation of contact stimuli by diapers for infants: Relationship between contact stimuli and walking motion Peer-reviewed

Takuya Nomata, Takeshi Okuyama, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　39　(1-4)　479-485　2012

DOI： 10.3233/JAE-2012-1499 　

ISSN： 1383-5416
紙オムツによる乳幼児への触刺激の定量化に関する研究－歩行動作と触刺激の関連性の検討－ Peer-reviewed

野俣拓也, 奥山武志, 田中真美

日本AEM学会誌　19　(2)　330-335　2011/06/30
Development of tactile sensor for measuring hair touch feeling Peer-reviewed

Takeshi Okuyama, Makoto Hariu, Tomoyuki Kawasoe, Minori Kakizawa, Hideki Shimizu, Mami Tanaka

MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS　17　(5-7)　1153-1160　2011/06

DOI： 10.1007/s00542-011-1267-1 　

ISSN： 0946-7076
Characteristic evaluation of a solid polymer electrolyte sensor Peer-reviewed

Manabu Otsuki, Takeshi Okuyama, Mami Tanaka

MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS　17　(5-7)　1129-1133　2011/06

DOI： 10.1007/s00542-011-1285-z 　

ISSN： 0946-7076
Study on evaluation of muscle conditions using a mechanomyogram sensor Peer-reviewed

Mami Tanaka, Takeshi Okuyama, Kazuhiro Saito

2011 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN, AND CYBERNETICS (SMC)　741-745　2011

DOI： 10.1109/ICSMC.2011.6083730 　

ISSN： 1062-922X
A compact sensor system for reading Braille Consideration of operation performance Peer-reviewed

Takeshi Okuyama, Mami Tanaka

2011 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN, AND CYBERNETICS (SMC)　736-740　2011

DOI： 10.1109/ICSMC.2011.6083729 　

ISSN： 1062-922X
Advanced Hapic Sensor System Based on Mechanism of Haptic Perception

Daisuke Tsuchimi, Takeshi Okuyama, Mami Tanaka

ICAST 2010　2010/10/04
Development of Tactile Sensor for Measuring Hair Touch Feeling Peer-reviewed

Takeshi Okuyama, Makoto Hariu, Tomoyuki Kawasoe, Minori Kakizawa, Hideki Shimizu, Mami Tanaka

20th Annual Conference on Information Storage and Processing Systems, (2010), June 14-15, Santa Clara, CA, USA　283-285　2010/06/14
Characteristic evaluation of a solid polymer electrolyte sensor Peer-reviewed

Manabu Otsuki, Takeshi Okuyama, Mami Tanaka

20th Annual Conference on Information Storage and Processing Systems, (2010), June 14-15, Santa Clara, CA, USA　319-321　2010/06/14
Development of a solid polymer electrolyte sensor

Manabu Otsuki, Takeshi Okuyama, Ryota Komiya, Nozomu Sugoh, Mami Tanaka

The 22nd Symposium on Electromagnetics and Dynamics(SEAD22)　546-547　2010/05/19
A study on quantifying a contact stimulus of diapers to infants

Takuya Nomata, Takeshi Okuyama, Hiromi Teraoka, Yasuo Murakami, Kiyoshi Miyazawa, Mami Tanaka

The 22nd Symposium on Electromagnetics and Dynamics(SEAD22)　348-349　2010/05/19
Development of nail mounted palpation sensor

Takeshi Okuyama, Otaki Takuo, Tanahashi Yoshikatsu, Mami Tanaka

The 22nd Symposium on Electromagnetics and Dynamics(SEAD22)　310-311　2010/05/19
Quantification of a contact stimulus by diapers Peer-reviewed

Takuya Nomata, Takeshi Okuyama, Hiromi Teraoka, Yasuo Murakami, Kiyoshi Miyazawa, Mami Tanaka

ICMIT 2009: MECHATRONICS AND INFORMATION TECHNOLOGY　7500　280-282　2010

DOI： 10.1117/12.858310 　

ISSN： 0277-786X
Development of a Palpation Sensor by Using Multi Signal Processing - Fundamental characteristics of the prototype sensor system Peer-reviewed

Hiroshi Nagai, Takeshi Okuyama, Mami Tanaka

ICMIT 2009: MECHATRONICS AND INFORMATION TECHNOLOGY　7500　2010

DOI： 10.1117/12.858453 　

ISSN： 0277-786X
Time response property of a solid polymer electrolyte sensor Peer-reviewed

Otsuki, M, Okuyama, T, Tanaka, M

21st International Conference on Adaptive Structures and Technologies 2010, ICAST 2010　210-215　2010
Development of a palpation sensor using bimorph cells-signal processing for smoothness measurement Peer-reviewed

Nagai, H, Okuyama, T, Tanaka, M

21st International Conference on Adaptive Structures and Technologies 2010, ICAST 2010　233-238　2010
Advanced haptic sensor system based on mechanism of haptic perception: Effectivity of amplitude and frequency for smoothness Peer-reviewed

Tsuchimi, D, Okuyama, T, Tanaka, M

21st International Conference on Adaptive Structures and Technologies 2010, ICAST 2010　530-535　2010
Quantification of a contact stimulus by diapers Peer-reviewed

Takuya Nomata, Takeshi Okuyama, Hiromi Teraoka, Yasuo Murakami, Kiyoshi Miyazawa, Mami Tanaka

ICMIT 2009: MECHATRONICS AND INFORMATION TECHNOLOGY　7500　75000I　2010

DOI： 10.1117/12.858310 　

ISSN： 0277-786X
Advanced Haptic Sensor for Measuring Human Skin Conditions Peer-reviewed

Daisuke Tsuchimi, Takeshi Okuyama, Mami Tanaka

ICMIT 2009: MECHATRONICS AND INFORMATION TECHNOLOGY　7500　75000K　2010

DOI： 10.1117/12.858439 　

ISSN： 0277-786X
Palpation Sensor Using Two PVDF Films Peer-reviewed

Takeshi Okuyama, Mikiko Sone, Yoshikatsu Tanahashi, Mami Tanaka

ICMIT 2009: MECHATRONICS AND INFORMATION TECHNOLOGY　7500　75000J　2010

DOI： 10.1117/12.858316 　

ISSN： 0277-786X
Characterization of a Curvature Sensor Using a Solid Polymer Electrolyte Peer-reviewed

Manabu Otsuki, Takeshi Okuyama, Mami Tanaka

ICMIT 2009: MECHATRONICS AND INFORMATION TECHNOLOGY　7500　75000L　2010

DOI： 10.1117/12.858441 　

ISSN： 0277-786X
Property evaluation of an artificial esophagus with peristaltic motion using shape memory alloy Peer-reviewed

Hiroyuki Miki, Takeshi Okuyama, Shingo Kodaira, Yun Luo, Toshiyuki Takagi, Tomoyuki Yambe

Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C　76　(766)　1560-1566　2010
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/kikaic.76.1560 　

ISSN： 0387-5024
Artificial-esophagus with peristaltic motion using shape memory alloy Peer-reviewed

Hiroyuki Miki, Takeshi Okuyama, Shingo Kodaira, Yun Luo, Toshiyuki Takagi, Tomoyuki Yambe, Takeshi Sato

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　33　(1-2)　705-711　2010

DOI： 10.3233/JAE-2010-1176 　

ISSN： 1383-5416
A curvature sensor using a solid polymer electrolyte Peer-reviewed

Takeshi Okuyama, Manabu Otsuki, Ryota Komiya, Nozomu Sugoh, Mami Tanaka

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　33　(1-2)　823-829　2010

DOI： 10.3233/JAE-2010-1191 　

ISSN： 1383-5416
固体高分子電解質を用いた曲率センサの特性評価 Peer-reviewed

大槻学, 奥山武志, 田中真美

日本AEM学会誌　18　(3)　239-244　2010
Development of a Palpation Sensor by using Multi Signal Processing 0Fundamental Peer-reviewed

Hiroshi Nagai, Takeshi Okuyama, Mami Tanaka

2009 International Conference on Mechatronics and Information Technology　331-332　2009/12/03
Development of a haptic sensor for monitoring human skin condition: measurement of softness, smoothness, and tackiness

Daisuke Tsuchimi, Takeshi Okuyama, Mami Tanaka

Proceeding of the 2009 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　2009　311-312　2009/06/17
Publisher: The Japan Society of Mechanical Engineers

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This paper describes the development of a haptic sensor using a polyvinylidene fluoride (PVDF) film, which is a kind of piezoelectric materials. Output characteristic of PVDF film is similar to one of pacinian corpuscles in human skin. In experiment, smoothness and softness of skin model were measured using the sensor system. After that, the results were compared with physical properties of the objects.
Development of a haptic sensor for evaluation of hair conditions Invited Peer-reviewed

Takeshi Okuyama, Makoto Hariu, Minori Kakizawa, Tomoyuki Kawasoe, Hideki Shimizu, Mami Tanka

The 21st Symposium on Electromagnetics and Dynamics(SEAD21)　625-628　2009/05
Development of a compact sensor system for reading Braille; Consideration of operation performance Invited Peer-reviewed

Mami Tanaka, Yusuke Kon, Takeshi Okuyama

The 21st Symposium on Electromagnetics and Dynamics(SEAD21)　633-634　2009/05
Artificial-esophagus with Peristaltic Motion using Shape Memory Alloy Peer-reviewed

Hiroyuki Miki, Toshiyulci Takagi, Takeshi Sato, Shingo Kodaira, Takeshi Okuyama, Yun Luo, Tomoyuki Yambe

APPLIED ELECTROMAGNETICS AND MECHANICS (II)　13　263-+　2009

ISSN： 1343-2869
A curvature sensor using a solid polymer electrolyte Peer-reviewed

Takeshi Okuyama, Manabu Otsuki, Mami Tanaka, Ryota Komiya, Nozomu Sugoh

APPLIED ELECTROMAGNETICS AND MECHANICS (II)　13　341-+　2009

ISSN： 1343-2869
Development of a Haptic Sensor System for Monitoring Human Skin Conditions Peer-reviewed

D. Tsuchimi, T. Okuyama, M. Tanaka

13TH INTERNATIONAL CONFERENCE ON BIOMEDICAL ENGINEERING, VOLS 1-3　23　(1-3)　2219-2222　2009

DOI： 10.1007/978-3-540-92841-6_556 　

ISSN： 1680-0737
DEVELOPMENT OF A CURVATURE SENSOR USING A SOLID POLYMER ELECTROLYTE

Takeshi OKUYAMA, Manabu OTSUKI, Ryota KOMIYA, Nozomu SUGOH, Mami TANAKA

Proceedings of the 2009 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　315-316　2009
Publisher: The Japan Society of Mechanical Engineers

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This paper describes a development of a polymer sensor using a solid polymer electrolyte (SPE) film. The sensor has a basic structure that a SPE film is sandwiched between thin carbon films and conductive tape is attached on each carbon film. The SPE film has a good flexibility and can be used in air. First output response to deformation is investigated by applying the displacement. Then a curvature sensor using the material is proposed. In experiments, it is found that the proposed sensor is available to measure curvature directly without complex calculations.
Development of a Haptic Sensor System for Monitoring Human Skin Conditions Peer-reviewed

D. Tsuchimi, T. Okuyama, M. Tanaka

8th International Symposium of 2007 Global COE Program, “Global Nano-Biomedical Engineering, Education and Research Netwerk Centre“　86-89　2008/12/05
Development of a PVDF Tactile Sensor for an Endoscopic Application Peer-reviewed

Mikiko Sone, Takeshi Okuyama, Yoshikatsu Tanahashi, Seiji Chonan, Mami Tanaka

7th International Symposium of 2007 Global COE program “Global Nano-Biomedical Engineering Education and Research Network Centre”　92-93　2008/10/16
Development of an Artificial Esophagus with Peristaltic Motion Using Shape Memory Alloy Actuators

H. Miki, S. Kodaira, Y. Luo, T. Takagi, T. Yambe, Y. Kakubari, T. Okuyama

International Joint Conference of SMSAE/SMEBA 2008　247-253　2008/07
Advanced palpation sensor systems using PVDF films Invited Peer-reviewed

Mami Tanaka, Takeshi Okuyama, Daisuke Tsuchimi, Mikiko Sone, Hirofumi Nesor, Yoshikatu Tanahashi

Proceedings of 9th International symposium of 2007 Global COE program “Global Nano-Biomedial Engineering Education and Research Network Centre”　6-9　2008
Development of an endoscopic tactile sensor using PVDF films Peer-reviewed

Takeshi Okuyama, Mikiko Sone, Yoshikatsu Tanahashi, Seiji Chonan, Mami Tanaka

ICMIT 2007: MECHATRONICS, MEMS, AND SMART MATERIALS, PTS 1 AND 2　6794　2008

DOI： 10.1117/12.784393 　

ISSN： 0277-786X

eISSN： 1996-756X
Passive mechanical properties of large intestine under in vivo and in vitro compression Peer-reviewed

Masaru Higa, Yun Luo, Takeshi Okuyama, Toshiyuki Takagi, Yasuyuki Shiraishi, Tomoyuki Yambe

MEDICAL ENGINEERING & PHYSICS　29　(8)　840-844　2007/10

DOI： 10.1016/j.medengphy.2006.09.003 　

ISSN： 1350-4533
Development of Surface Inspection by Multi-beam Laser Ultrasonic System Peer-reviewed

Takeshi Okuyama, Tetsuo Fukuchi, Hiroyuki Fukutomi, Takashi Ogata

CRIEPI report　Q06022　(6022)　1-11,巻頭1〜3　2007/09
Publisher:
Application of laser ultrasound to noncontact temperature measurement of composites Peer-reviewed

Tetsuo Fukuchi, Takeshi Okuyama, Takashi Ogata

CRIEPI report　H06012　(6012)　1-10,巻頭1〜4　2007/08
Publisher:
Investigations of Ultrasonic Testing for Dissimilar Metal Weld Zone of Nickel based Alloy - Part 1: Understanding of Wave Propagation Bahavior in Dissimilar Metal Weld Zone - Peer-reviewed

Takeshi Okuyama, Hiroyuki Fukutomi, Shan Lin, Takashi Ogata

CRIEPI report　Q06007　(6007)　1-19,巻頭1〜4　2007/05
Publisher:
In vivo measurements and constitutive modeling of colon tissue Peer-reviewed

M. Higa, Y. Luo, T. Okuyama, Y. Shiraishi, H. Liu, T. Yambe, T. Takagi

WORLD CONGRESS ON MEDICAL PHYSICS AND BIOMEDICAL ENGINEERING 2006, VOL 14, PTS 1-6　14　3186-+　2007

ISSN： 1680-0737
Characterization of the passive mechanical properties of large intestine Peer-reviewed

Masaru Higa, Yun Luo, Takeshi Okuyama, Toshiyuki Takagi

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　25　(1-4)　595-599　2007

ISSN： 1383-5416
Design of safe surgical forceps using superelastic SMAs Peer-reviewed

Yun Luo, Masaru Higa, Takeshi Okuyama, Toshiyuki Takagi

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　25　(1-4)　571-576　2007

ISSN： 1383-5416
Modeling the mechanical behavior of an SMA manipulator Peer-reviewed

Takeshi Okuyama, Kumiko Yakuwa, Yun Luo, Masaru Higa, Toshiyuki Takagi

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　25　(1-4)　495-501　2007

ISSN： 1383-5416
Development of a multi-beam laser ultrasonic system

Tetsuo Fukuchi, Takeshi Okuyama, Hiroyuki Fukutomi, Takashi Ogata

The 27th Symposium on ULTRASONIC ELECTRONICS　405-406　2006/11
Detection of backwall slit by laser ultrasonic technique

Hiroyuki Fukutomi, Tetsuo Fukuchi, Takeshi Okuyama, Takashi Ogata

The 27th Symposium on ULTRASONIC ELECTRONICS　403-404　2006/11
Preclinical development of SMA artificial Invited

Yun Luo, Masaru Higa, Shintaro Amae, Toshiyuki Takagi, Tomoyuki Yambe, Takeshi Okuyama, Hiromu Tanaka, Yasuyuki Kakubari, Hidetoshi Matsuki

MINIMALLY INVASIVE THERAPY & ALLIED TECHNOLOGIES　15　(4)　241-245　2006/08

DOI： 10.1080/13645700600836695 　

ISSN： 1364-5706
Preclinical safety assessment of SMA artificial anal sphincters

Yun Luo, Masaru Higa, Shintaro Amae, Hiromu Tanaka, Takeshi Okuyama, Toshiyuki Takagi, Tomoyuki Yambe, Yasuyuki Kakubari

7th Japan-France Joint Seminar on Intelligent Materials and Systems 2006　9　2006/06
粘弾性効果を考慮したin vivoにおける大腸の力学的特性評価試験 Peer-reviewed

比嘉昌, 羅雲, 奥山武志, 高木敏行, 白石泰之, 山家智之

人工臓器　34　(2)　S-95　2005/11
Proposal of peristaltic actuator component for artificial esophagus using shape memory alloy

Mitsuyoshi Yamaguchi, Takeshi Okuyama, Toshiyuki Takagi, Tomoyuki Yambe, Hiroyuki Miki

Abstracts of Second International Conference on Flow Dynamics　2005/11
Thermal control of shape memory alloy artificial anal sphincters for complete implantation Peer-reviewed

Y Luo, T Okuyama, T Takagi, T Kamiyama, K Nishi, T Yambe

SMART MATERIALS & STRUCTURES　14　(1)　29-35　2005/02

DOI： 10.1088/0964-1726/14/1/003 　

ISSN： 0964-1726
The possibility of muscle tissue reconstruction using shape memory alloys. International-journal Peer-reviewed

Yun Luo, Masaru Higa, Shintaro Amae, Tomoyuki Yambe, Takeshi Okuyama, Toshiyuki Takagi, Hidetoshi Matsuki

Organogenesis　2　(1)　2-5　2005/01

ISSN： 1547-6278

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Severe dysfunction of muscle tissues can be treated by transplantation but the success rate is still not high enough. One possibility instead is to replace the dysfunctional muscle with artificial muscles. This article introduces a unique approach using shape memory alloys (SMAs) to replace the anal sphincter muscle for solving the problem of fecal incontinence. The use of SMAs that exhibit a two-way shape memory effect allows the device to function like a sphincter muscle and facilitates simple design. In this article, we will give a brief introduction to the functional material-SMA-together with its medical applications, and will follow this with a description of the recent progress in research and development of an SMA-based artificial sphincter. The possibility of its commercialization will also be discussed.
One-dimensional modeling of stress-induced transformation behaviour of shape memory alloy Peer-reviewed

Takeshi Okuyama, Yun Luo, Toshiyuki Takagi, Minoru Matsumoto

Journal of Advanced Science　17　(1&2)　128-131　2005/01

DOI： 10.2978/jsas.17.128 　
Functional evaluation of an artificial anal sphincter using shape memory alloys Peer-reviewed

Y Luo, T Takagi, T Okuyama, S Amae, M Wada, K Nishi, T Kamiyama, T Yambe, H Matsuki

ASAIO JOURNAL　50　(4)　338-343　2004/07

DOI： 10.1097/01.MAT.0000131819.07741.EF 　

ISSN： 1058-2916
Shape memory alloy artificial muscles for treatments of fecal incontinence Peer-reviewed

Y Luo, T Takagi, S Amae, M Wada, T Yambe, T Kamiyama, K Nishi, T Okuyama, T Komoriya, H Matsuki

MATERIALS TRANSACTIONS　45　(2)　272-276　2004/02

DOI： 10.2320/matertrans.45.272 　

ISSN： 1345-9678

eISSN： 1347-5320
Development of SMA Artificial Anal Sphincter; Temperature Control System

T.Okuyama, Y. Luo, T. Takagi, T. Kamiyama, K. Nishi, S. Amae, T. Yambe

Proceedings of the First International Symposium on Intelligent Artifacts and Bio-systems　in CDROM　2004/02
Thermal control of an SMA artificial sphincter Peer-reviewed

Y Luo, T Okuyama, T Takagi, T Yambe, S Amae, K Nishi, T Kamiyama

SMART MATERIALS FOR ENGINEERING AND BIOMEDICAL APPLICATIONS, PROCEEDINGS　211-214　2004
SMA人工肛門括約筋における埋め込み型温度制御システムの開発 Peer-reviewed

奥山武志, 羅雲, 高木敏行, 西功太郎, 和田基, 山家智之, 神山隆道

日本AEM学会誌　12　(1)　48-53　2004
Publisher:
ISSN： 0919-4452
In-situ eddy current monitoring under high temperature environment Peer-reviewed

T Kasuya, T Okuyama, N Sakurai, H Huang, T Uchimoto, T Takagi, YG Lu, T Shoji

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　20　(3-4)　163-170　2004

ISSN： 1383-5416
Development of an implantable artificial anal sphincter using a shape memory alloy Peer-reviewed

K Nishi, T Kamiyama, M Wada, S Amae, T Ishii, T Takagi, Y Luo, T Okuyama, T Yambe, Y Hayashi, R Ohi

JOURNAL OF PEDIATRIC SURGERY　39　(1)　69-72　2004/01

DOI： 10.1016/S0022-3468(03)00701-2 　

ISSN： 0022-3468
Magnetization reversal in weak ferrimagnets and canted antiferromagnets Peer-reviewed

H Kageyama, DI Khomskii, RZ Levitin, MM Markina, T Okuyama, T Uchimoto, AN Vasil'ev

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　262　(3)　445-451　2003/06

DOI： 10.1016/S0304-8853(03)00076-3 　

ISSN： 0304-8853
Application of SMAs with Two-way Shape Memory Effect to Artificial Anal Sphincters

Yun Luo, Toshiyuki Takagi, Takashi Okuyama, Shintaro Amae, Motoshi Wada, Kohtaro Nishi, Tomoyuki Yambe, Takamichi Kamiyama, Hidetoshi Matsuki

Proceedings of The First World Congress on Biomimetics and Artificial Muscles　in CDROM　2002/12/09
One-dimensional constitutive model of stress-induced transitions between M-s and M-f in shape memory alloys Peer-reviewed

Y Luo, T Okuyama, T Takagi

SMART STRUCTURES AND MATERIALS 2002: ACTIVE MATERIALS: BEHAVIOR AND MECHANICS　4699　335-342　2002

DOI： 10.1117/12.474991 　

ISSN： 0277-786X

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Misc. 146

Measurement of Tactile and Force Sensation

OKUYAMA Takeshi

Journal of the Japan Society for Precision Engineering　89　(8)　615-619　2023/08/05
Publisher: The Japan Society for Precision Engineering
DOI： 10.2493/jjspe.89.615 　

ISSN： 0912-0289

eISSN： 1882-675X
歩行時の下腿体表面振動への着圧ソックスによる影響評価に関する研究

榊原優太, 奥山武志, 田中真美

日本機械学会IIP2023 情報・知能・精密機器部門（IIP 部門）講演会　344-348　2023/03
粗さの異なる対象物へのなでる動作による硬軟感評価値と触動作特徴の関係解析に関する研究

川南昇太, 奥山武志, 田中真美

日本機械学会IIP2023 情報・知能・精密機器部門（IIP 部門）講演会　324-325　2023/03
水分量が異なる指腹部の機械的特性と粗さ感知覚特性の関係解明に関する研究

高成真輝, 奥山武志, 田中真美

日本機械学会IIP2023 情報・知能・精密機器部門（IIP 部門）講演会　320-323　2023/03
Tactile sensor using piezoelectric film

奥山武志

電気学会全国大会講演論文集(CD-ROM)　2023　2023
複数の指輪型センサを用いた指先力システムの開発に関する研究

郷初瑠, 奥山武志, 田中真美

バイオメカニズム学術講演会予稿集　43rd (CD-ROM)　2022
Analysis of muscle condition by calf raises exercise while wearing compression socks

明瀬遼司, 榊原優太, 奥山武志, 田中真美

日本機械学会情報・知能・精密機器部門講演会論文集(CD-ROM)　2022　2022

ISSN： 2424-3140
Study on muscle activity measurement of flexor digitorum superficialis and flexor digitorum profundus using surface EMG when exerting force at fingertip

杉本智基, 奥山武志, 田中真美

日本機械学会情報・知能・精密機器部門講演会論文集(CD-ROM)　2022　2022

ISSN： 2424-3140
Study on evaluation of sensor characteristics of Robotic finger system for prostate palpation

佐藤泰河, CHIKWETO Francis Chewe, 奥山武志, 田中真美

日本機械学会年次大会講演論文集(CD-ROM)　2022　2022

ISSN： 2424-2667
Research on the development of a handy palpation sensor system considering a stability of manual scanning y

谷口尚大, 奥山武志, 田中真美

日本機械学会年次大会講演論文集(CD-ROM)　2022　2022

ISSN： 2424-2667
Study on the development of a handheld tactile sensor system

塙啓輔, 奥山武志, 田中真美

計測自動制御学会システムインテグレーション部門講演会(CD-ROM)　23rd　2022
Development on a double-sheet type tactile display for a sense of a flexible object with hard inclusions

後藤大輝, 奥山武志, 田中真美

計測自動制御学会システムインテグレーション部門講演会(CD-ROM)　23rd　2022
Study on measurement of indentation into finger flexor tendon for measuring fingertip force

杉本智基, 奥山武志, 三田正彬, 田中真美

電磁力関連のダイナミクスシンポジウム講演論文集　33rd　2021
Development of a handy palpation sensor system integrated a inertia sensor

谷口尚大, 奥山武志, 若山琢, 田中真美

電磁力関連のダイナミクスシンポジウム講演論文集　33rd　2021
Study on Quantification of Tactile Perception for Wood Imitations by Resin Print

石井拓人, 奥山武志, 鈴木健太, 下村尚登, 上ノ町孝志, 田中真美

日本機械学会年次大会講演論文集(CD-ROM)　2021　2021

ISSN： 2424-2667
Development of a Fingertip Skin Deformation Measurement System Using Optical Coherence Tomography

原昂大, 奥山武志, 田中真美

日本機械学会年次大会講演論文集(CD-ROM)　2021　2021

ISSN： 2424-2667
Study on tactile maps using a tactile sensor system

塙啓輔, 栗島悠介, 奥山武志, 田中真美

計測自動制御学会システムインテグレーション部門講演会(CD-ROM)　22nd　2021
Study on Correlation Between Touching Condition and Texture Perception

城野紗希, 奥山武志, 田中真美

日本機械学会情報・知能・精密機器部門講演会論文集(CD-ROM)　2021 (Web)　2021

ISSN： 2424-3140
Measurement of body surface vibration on lower leg wearing compression socks

成澤崇利, 奥山武志, 田中真美

日本機械学会情報・知能・精密機器部門講演会論文集(CD-ROM)　2021 (Web)　2021

ISSN： 2424-3140
Development of a Tactile Sensor System with Control of Contact Force

奥山武志, 馬場麻里奈, 田中真美

計測自動制御学会システムインテグレーション部門講演会(CD-ROM)　21st　2020
Study on development of handheld palpation sensor system

田中真美, 若山琢, 奥山武志

日本機械学会年次大会講演論文集(CD-ROM)　2020　2020

ISSN： 2424-2667
粗さ感知覚と指先特性の関係に関する研究

高橋凜, 奥山武志, 田中真美

第31回「電磁力関連のダイナミクス」シンポジウム講演論文集　22B2-6　2019/05
指輪型指先力計測センサの指動作への影響評価に関する研究

三田正彬, 奥山武志, 田中真美

第31回「電磁力関連のダイナミクス」シンポジウム講演論文集　22B2-7　2019/05
しこり検出用触診センサシステムの開発に関する研究

武内大樹, 田中真美, 奥山武志

日本機械学会IIP2019 情報・知能・精密機器部門（IIP 部門）講演会　1B07　2019

DOI： 10.1299/jsmeiip.2019.1B07 　

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In this paper, a palpation sensor system to detect lumps in soft palpation objects such as breast cancer is developed. During scanning of the developed sensor on the measuring objects, the reaction force applied to the contact part is measured by a load cell. And the lump is detected by find a peak waveform of the reaction force. Measuring objects embedding a lump with several conditions of depth and diameter are prepared. Palpation experiments for the measuring objects are conducted. And from the results, it was found the lump of 6mm in diameter embedded in 15mm in depth can be detected with the developed palpation sensor system. In addition, by investigation of relationships between the pressing depth of the sensor to measuring objects and the depth of the detected lump, it was suggested that the depth of lump can be estimated from the combination of results for different pressing depth conditions.
前立腺触診用単関節ロボットフィンガシステムの開発に関する研究

田村亮磨, 奥山武志, 田中真美

日本機械学会IIP2019 情報・知能・精密機器部門（IIP 部門）講演会　1B06　2019

DOI： 10.1299/jsmeiip.2019.1B06 　

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In this study, a single joint robot finger system to palpate the prostate is developed. For the palpation, the robot finger is bended by pulling the driving wires. And estimation of the robot fingertip position from the length of the driving wires and estimation of the contact force between fingertip and measuring objects are necessary. First, the theoretical model of the robot finger geometrically was constructed, and the relationship between the bending shape and the coordinates of the fingertip was derived. Also, a method to estimate the contact force between the fingertip and the object using the principle of virtual work from the tension of the driving wires was derived. Next, the robot fingertip position accuracy was confirmed by conducting position measurement experiment. Finally, a palpation experiment was conducted on the gel samples, and the utility of this system was confirmed by estimating the contact force.
機械工学的ヒューマンセンシング

奥山武志

日本機械学会IIP2019 情報・知能・精密機器部門（IIP 部門）講演会　2019

DOI： 10.1299/jsmeiip.2019.wakate_1 　

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Human sensing technology is used in various fields such as medical field and industrial field. In this human sensing, motion information such as the position of each part of the body, physiological information such as heartbeat, psychological information such as sensation, etc. are measured. In the measurement of biological information with mechanical phenomena, the viewpoint from mechanical engineering is important to consider the selection and arrangement of sensors. We develop the measurement system of finger motion to investigate relationship between the tactile sensation and the finger motion. In this paper, the developed measurement systems are introduced.
触覚・触感計測技術を基盤とした医療福祉テクノロジーの創出

田中真美, 奥山武志

精密工学会誌　85　(4)　332-333　2019

DOI： 10.2493/jjspe.85.332 　
引掻き音による皮膚に対する引掻き動作の力学的特徴の推定に関する研究

奥山武志, 渡邊圭裕, 田中真美

日本機械学会2019年度年次大会講演論文集　J16112　2019
加速度センサ及び力センサを組み込んだ引掻き動作計測センサシステムの開発

林崎俊賢, 奥山武志, 田中真美

日本機械学会2019年度年次大会講演論文集　J16113P　2019
指先の動作および音に着目した粗さ感評価に関する研究

高橋謙一, 小川智洋, 奥山武志, 田中真美

日本機械学会2019年度年次大会講演論文集　J16114P　2019
粘弾性計測用センサシステムの開発に関する研究

小林和馬, ノヒョンタク, 奥山武志, 田中真美

第28回MAGDAコンファレンスin大分講演論文集　386-389　2019
外部からの振動印加で生じた体表面振動の計測による筋活動評価に関する研究

成澤崇利, 佐藤諒駿, 平田正成, 奥山武志, 田中真美

第28回MAGDAコンファレンスin大分講演論文集　372-375　2019
柔軟シートを用いた硬軟感呈示システムの開発に関する研究

鈴木励, 奥山武志, 田中真美

第28回MAGDAコンファレンスin大分講演論文集　352-355　2019
接触面積に着目した硬軟感知覚メカニズムの解明に関する研究

奥山武志, 渡邊慎也, 田中真美

計測自動制御学会システムインテグレーション部門講演会(CD-ROM)　1340-1343　2018/12
人体を計測して設計する手指の動作計測

奥山武志

設計工学　53　(11)　808-813　2018/11
Publisher: 日本設計工学会
ISSN： 0919-2948
顎舌骨筋に着目した嚥下運動計測用センサの開発に関する研究

梅村仁美, 奥山武志, 田中真美

第27回MAGDAコンファレンスin Katsushika講演論文集　450-453　2018/10
走査式ローラ型触診センサシステムによる球状異常部位の検知に関する研究

若山琢, 奥山武志, 田中真美

第27回MAGDAコンファレンスin Katsushika講演論文集　454-457　2018/10
前立腺触診用柔軟フィンガシステムの開発―ワイヤ張力によるフィンガ先端の接触力推定

奥山武志, 岡前雄大, 田中真美

計測自動制御学会システムインテグレーション部門講演会SI2017　3B4_04　2018
Study on characteristics evaluation of ring-type fingertip force sensor in various finger postures

KUSANO Tadamasa, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2018 (Web)　1B12　2018

DOI： 10.1299/jsmeiip.2018.1B12_1 　

ISSN： 2424-3140

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In this paper, method to estimate fingertip force with ring-type wearable sensor is proposed. To select effective exercises, it is important to accurately measure motion of patient, such as postures and force. Especially, fingers perform complicated movements, loss of function significantly adverse effects on active of living. Measurement of fingertip force is relatively difficult, because it is necessary to use load cells in the target object or between finger and object. Therefore, in previous study, we focused on the relationship between tension of tendon and fingertip force, and proposed ring-type wearable sensor to estimate the fingertip force. First, we investigate the relationship between finger joint angle and sensor output at the condition that the fingertip force is zero. Next, the relationship at the condition that fingertip force is applied is investigated too. Finally, on the basis of above investigations, the relational expression between the joint angle, the ring-type sensor output, and the fingertip force was derived as new calibration formula for estimating fingertip force.
嚥下機能計測用センサシステムの開発

橋本博和, 梅村仁美, 奥山武志, 田中真美

第30回「電磁力関連のダイナミクス」シンポジウムin長野講演論文集　304-307　2018
皮革素材の触感計測に関する研究

吉村天志, 奥山武志, 田中真美

第30回「電磁力関連のダイナミクス」シンポジウムin長野講演論文集　308-311　2018
引掻き強さ評価のためのマイクセンサシステムの開発

奥山武志, 磯崎剛志郎, 田中真美

日本機械学会2018年度年次大会講演論文集　J1630205　2018

DOI： 10.1299/jsmemecj.2018.J1630205 　
簡易装着型嚥下計測用センサシステムの開発

田中真美, 橋本博和, 奥山武志

日本機械学会2018年度年次大会講演論文集　J1630207　2018

DOI： 10.1299/jsmemecj.2018.J1630207 　
Study on measuring contact state of finger-tip during evaluating hardness for flexible objects

WATANABE Shinya, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2017　F-07-7　2017
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeiip.2017.F-07 　

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Human beings gain a lot of sense by using haptic perception. Especially, the sense of hardness is important for physician to palpate patients&rsquo; bodies. However, it is difficult to share the sense of hardness. Therefore haptic hardness sensor systems are demanded. For the development of the haptic sensor system, it is necessary to elucidate the mechanism of human perception about the sense of hardness. In previous studies, it has been clarified that not only physical property about objects such as young&rsquo;s modulus but also contact state such as contact area affects the sense of hardness. Therefore, this study aims to measure contact state of finger-tip during evaluating hardness for flexible objects. For this purpose, measurement system using Optical Coherence Tomography was developed. And contact area and three-dimensional contact shape during evaluating hardness for flexible objects were measured.
A Study on Sensor System for Swallowing Measurements

HASHIMOTO Hirokazu, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2017　F-08-8　2017
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeiip.2017.F-08 　

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The accidental swallowing caused by decline of the ability to swallow due to aging is a severe problem for elder people. Therefore, effective methods of monitoring swallowing action and estimating swallowing function are required. In this paper, a piezoelectric film sensor is developed to estimate the swallowing function. To investigate the relationship between swallowing action and sensor output behavior, pharynx movement is measured by using the piezoelectric film sensor and three-dimensional motion analysis system. In experiments, we measured the swallowing action during repetitive saliva swallowing test that is a major screening test for dysphagia by using the developed sensor system. As a result, it is found that number of swallowing can be evaluated by using the standard deviation of the developed sensor output.
Development of artificial soft finger system for palpating prostate gland- Mechanical characteristics evaluation of finger part -

OKUYAMA Takeshi, OKAMAE Yudai, TANAKA Mami

The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec)　2017　1P1-L05-L05　2017
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmermd.2017.1P1-L05 　

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Palpation is a diagnosis method that physicians get information about organ by using touch sensation. However, palpation is a subjective method, and accuracy of diagnosis depends on physician's experience and skill. Therefore, in order to make palpation objective and more accurate, a palpation sensor system has been required. In previous study, we proposed an artificial soft finger system to palpate a prostate gland. The artificial finger was composed of a silicone cylinder, wires, and two motors. Two wires are connected with motors through the silicone cylinder. And the artificial finger turns in various directions according to length of wires. And we obtained a relation formula for estimating the fingertip position from the length of wires. In this paper, we proposed an estimation method of hardness by using the artificial finger system. And to realize the method, mechanical characteristics of the finger part was obtained by experiments.
ボールローラ接触子を有する触診センサシステムの開発

田中真美, 大泉仁, 奥山武志

第29回「電磁力関連のダイナミクス」シンポジウムin長野講演論文集　391-392　2017
指輪型指先力計測センサの開発

奥山武志, 小林晃平, 田中真美

第29回「電磁力関連のダイナミクス」シンポジウムin長野講演論文集　393-394　2017
柔軟物内のしこり検出のための押し込み試験による力学特性評価に関する研究

武内大樹, 奥山武志, 田中真美

第26回MAGDAコンファレンスin金沢講演論文集　281-284　2017
引掻き音検出のための基礎研究-布こすれ音と皮膚引掻き音の判別

渡邉圭裕, 奥山武志, 田中真美

第26回MAGDAコンファレンスin金沢講演論文集　285-288　2017
人工皮膚モデルに対する穿刺力評価に関する基礎研究

田村亮磨, 奥山武志, 田中真美

第26回MAGDAコンファレンスin金沢講演論文集　387-390　2017
The effect of surface roughness on human stiffness feeling : 1st Report:Sensory evaluation

KANG Semin, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of Conference of Tohoku Branch　2016　(51)　147-148　2016
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeth.2016.51.147 　
Study on evaluation of Muscle Activity during Upper limb exercise using Mechanomyogram

KUMAGAI Hikaru, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of Conference of Tohoku Branch　2016　(51)　145-146　2016
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeth.2016.51.145 　
The effect of surface roughness on human stiffness feeling (2st Report : Fingertip motion analysis)

KANG Semin, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2016　F-2-1　2016

DOI： 10.1299/jsmeiip.2016.F-2-1 　

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In this paper, influence of surface roughness on feeling of stiffness is investigated in term of touch motion. Five silicone samples, each of which has different surface roughness and the same hardness, were fabricated. Sensory evaluation on feeling of stiffness for the samples was conducted. In sensory evaluations, panelists evaluated stiffness of samples according to two kinds of instruction. One is that panelists evaluated the samples freely. The other is that panelists evaluated them with feeling the surface roughness. From the results of sensory evaluation, it was found that surface roughness obviously affected feeling of stiffness in the case of instruction that panelists evaluated them with feeling the surface roughness. During sensory evaluation, fingertip trajectories and contact force to the samples were measured. As a result, it was found that touch motions differ depending on the instructions for sensory evaluation.
Measurement of Tactile Sensation of Touch Panel Surface

KATAGIRI Takuya, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2016　F-2-2　2016

DOI： 10.1299/jsmeiip.2016.F-2-2 　

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In recent years, the information terminal using a touch panel has become widespread. Touch panel is a device that people touches directly. Therefore, touch feeling of touch panels is important. However, methods for evaluating touch feeling of touch panel surfaces have not been established. In this study, an objective evaluation method for touch feeling of touch panel surface is established based on the tactile sensor system developed in previous studies. Firstly, the sensory evaluations for touch panel samples with different surface treatments were conducted. Next, touch panel surfaces were measured by using tactile sensor system, and evaluation parameters by using sensor output were calculated in order to evaluate touch feeling. Finally, the evaluation parameters were compared with the results of sensory evaluation. As a result, it was confirmed that the tactile sensory system is useful to evaluate the touch feeling of touch panel surface objectively.
圧力分布センサを用いた紙おむつの触刺激評価に関する研究

田中真美, 谷口雄紀, 奥山武志

第28回「電磁力関連のダイナミクス」シンポジウムin横浜講演論文集　176-179　2016
人肌に対する引掻き音計測および動作評価に関する研究

奥山武志, 阿部貴夫, 田中真美

第28回「電磁力関連のダイナミクス」シンポジウムin横浜講演論文集　200-203　2016
引掻き動作評価のための装着型マイクセンサの開発に関する研究

磯? 剛志郎, 奥山武志, 田中真美

LIFE2016概要集　430-432　2016
Development of Wearable Fingertip Force Sensor System

OKUYAMA Takeshi, KOBAYASHI Kohei, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2016　J1640302　2016

DOI： 10.1299/jsmemecj.2016.J1640302 　

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In order to perform the rehabilitation of a finger effectively, it is important to measure finger force of patients without inhibiting the grip sensation and to give appropriate advice using the force data. Therefore, in previous study, we focused on the relationship between the tension of tendon and finger force, and proposed a ring type sensor that can estimate the finger force from tension of tendon. In this study, the influence of the finger postures on the ring type sensor output is investigated. First, relationship between the finger joint angle and the ring type finger force sensor output is investigated by using a wearable sensor integrated with finger joint angle sensor. From the results, a compensation method of the finger force using finger joint angle sensor output is constructed. In addition, finger force estimation experiments with using the integrated wearable sensor were conducted. In conclusion, it is confirmed that the integrated wearable sensor is useful for estimating finger force regardless of finger postures.
Development of Ball Roller Type Palpation Sensor System

TANAKA Mami, OIZUMI Jin, OKUYAMA Takeshi

日本機械学会2016年度年次大会講演論文集　2016　J1640201　2016

DOI： 10.1299/jsmemecj.2016.J1640201 　
バルーンカテーテルを用いた生体硬さ計測に関する研究

齋藤翔, 奥山武志, 田中真美

第25回MAGDAコンファレンスin桐生講演論文集　399-402　2016
Fundamental analysis of human scratch motion using three dimensional motion capture system and three axis load cell

OKUYAMA Takeshi, ABE Takao, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2015　J2410106　2015

DOI： 10.1299/jsmemecj.2015._J2410106- 　

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Monitoring of scratching motion, accompany with itchiness, is important for the medical treatment of skin diseases associated with itchiness. In previous study, the sensor system for measuring human scratching by scratch sound is developed and the relationship between the scratch sounds and the mechanical characteristics of human scratch motion was investigated. However, evaluation of human scratching motion against their own skin is not enough, because it is difficult to measure the contact force against human skin during scratching human skin. Therefore, in this paper, in order to measure the contact force, such as pressing force and shearing force of human scratching motion against their own skin, a contact force estimation method using three dimensional motion measurement system is proposed. In experiment, motions of scratching weakly and strongly artificial skin placed on 3-axis force sensor were measured. And finger tip trajectories and deformation of artificial skin were analyzed and compared with contact force. From the result, it is confirmed that the proposed estimation method is available to estimate the contact force during scratching.
Study on evaluation of contact stimulus by diaper considering pressure distribution

TANAKA Mami, TANIGUCHI Yuuki, OKUYAMA Takeshi

The Proceedings of Mechanical Engineering Congress, Japan　2015　J1630305　2015

DOI： 10.1299/jsmemecj.2015._J1630305- 　

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Recently, most of infants wear diapers in their daily life. Due to wearing a diaper, contact stimuli on skin causes dermatitis. The contact stimulus is measured by sensory evaluation. However, it is difficult to carry out sensory evaluation on infants. Therefore, a sensory system which can objectively evaluate the contact stimulus is demanded. In previous studies, we have developed a contact stimulus sensor using a polyvinylidene difluoride (PVDF) film and a strain gauge. However, influence of pressure distribution on contact stimulus feeling by human is not investigated. In this paper, a stimulation system of contact stimulus was developed in order to provide steady stimulus to human skin and sensor part. And a pressure distribution sensor is used as a contact stimulus sensor in order to investigate the influence of pressure distribution. In experiments, 4 kinds of diaper samples were evaluated by human sensory evaluation and sensor measurements. The sensor outputs were compared with human evaluated by human sensory evaluation and sensor measurements. The sensor outputs were compared with human evaluation values. From the results, it was found that a feeling of pressure is related to average pressure on the whole sensor, and a feeling of rubbing is related to degree of pressure concentration.
Study on measurement of human scratching motion by dorsal hand microphone

Okuyama Takeshi, Abe Takao, Tanaka Mami

The Proceedings of the Symposium on Micro-Nano Science and Technology　2015　28pm1-E-3　2015

DOI： 10.1299/jsmemnm.2015.7._28pm1-E-3 　

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Monitoring of scratching motion, accompany with itchiness, is important for the medical treatment of skin diseases associated with itchiness. In this paper, the microphone sensor system for measuring human scratching by scratch sounds is developed. The dorsal hand microphone is fabricated. And, in order to investigate the relationships between the scratch sounds and the mechanical characteristics of human scratch motion related to the contact force, we measure human scratching motion and scratch sounds by using the developed microphone sensor system and 3 dimensional motion capture system. In experiments, dorsal hand microphone is attached on the back of participates' hand and participates scratch their own skin. From the experimental results, the relationships between skin scratch sounds and contact force during scratching were clarified.
前立腺触診用ロボットフィンガシステムの開発に関する研究

岡前雄大, 奥山武志, 田中真美

精密工学会学術講演会講演論文集　2015A　933-934　2015
Publisher: 公益社団法人精密工学会
DOI： 10.11522/pscjspe.2015A.0_933 　

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本研究では，前立腺の自動触診システムを実現するために，医師の触診動作を模擬できるロボットフィンガの開発を行う．本ロボットフィンガは，シリコーン円柱フィンガの内部に2本の糸を通し，それぞれの糸をモータで巻き取ることで，フィンガ部を自由に屈曲させる仕組みである．理論解析および実験によりフィンガの先端位置と糸の巻き取り量の関係を検証し，本ロボットフィンガシステムにより触診動作を模擬できることを確認した．
指先力計測用ウェアラブルセンサの開発に関する研究

小林晃平, 奥山武志, 田中真美

精密工学会学術講演会講演論文集　2015A　931-932　2015
Publisher: 公益社団法人精密工学会
DOI： 10.11522/pscjspe.2015A.0_931 　

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手指のリハビリテーションを効果的に行うためには，患者の把持感覚を阻害せずに指先の力を定量的に評価し，適切なアドバイスを与えることが重要である．そこで，本研究では，指先の力と筋腱の張力の関連性に着目し，把持感覚を阻害せずに指先の力を推定できる指輪型センサを提案し，その指先力推定への有用を検証した．実験の結果，指を伸ばした状態であれば筋腱の張力変化から指先力を推定可能であることが確認できた．
様々な硬さの柔軟物を計測可能な小型硬さセンサの開発に関する研究

平田正成, 奥山武志, 田中真美

精密工学会学術講演会講演論文集　2015A　925-926　2015
Publisher: 公益社団法人精密工学会
DOI： 10.11522/pscjspe.2015A.0_925 　

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生体組織の硬さは部位や健康状態によって異なり，これらを1つのセンサで計測するためには，広い範囲の硬さを計測できるセンサが必要である．そこで，本研究では，広い範囲の硬さを計測可能な小型のセンサを提案し，理論解析によりセンサ部の設計を行うとともに，実験によりその有効性を確認した．実験では，水分量を変化させたゼラチンに対して硬さ測定実験を行い，本センサを用いて柔軟物の硬さ測定が可能であることを確認した．
体表面振動計測による下腿状態評価システムの開発

池田翔平, 奥山武志, 田中真美

第23回MAGDAコンファレンスin高松講演論文集　553-555　2014
三次元動作計測システムを用いた引掻き動作解析

阿部貴夫, 奥山武志, 田中真美

第23回MAGDAコンファレンスin高松講演論文集　549-552　2014
硬さ感知覚メカニズム解明のための指接触状態計測に関する研究

成井涼, 奥山武志, 田中真美

第23回MAGDAコンファレンスin高松講演論文集　545-548　2014
触刺激計測センサによる紙おむつの計測および官能評価

谷口雄紀, 奥山武志, 田中真美

精密工学会東北支部学術講演会講演論文集　57-58　2014
Study on a usability evaluation of a Braille sensor

Sakaguchi Asuka, Yokoyama Shota, Okuyama Takeshi, Tanaka Mami

The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME　2014　65-66　2014

DOI： 10.1299/jsmebio.2014.26.65 　
Study on an evaluation of lump mobility using a reciprocating roller scanning type palpation sensor

UBE Tetsuharu, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME　2014　63-64　2014

DOI： 10.1299/jsmebio.2014.26.63 　
J2410207 Study on measurement of palpation motion for prostate gland

OKUYAMA Takeshi, YOKOYAMA Shota, TANAHASHI Yoshikatsu, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2014　J2410207　2014

DOI： 10.1299/jsmemecj.2014._J2410207- 　

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Physician palpation is a useful medical examination, because it is non-invasive, quick and simple. However, to make an accurate diagnosis using palpation, physicians need long-time training and practice. Moreover, it is difficult for beginners to learn how to make a motion on palpation and what to feel at that time. Therefore, this study aims to clarify the relationship between the palpation motions and haptic sense, and to support beginners to improve the palpation skill. We focus on a palpation for prostate gland and develop a prostate palpation simulator for measuring actual palpation motions. By using the simulator and a measurement system consisting of four infrared cameras and a load cell, the palpation motions of an expert and five beginners are measured. Then it is confirmed that the expert has better palpation skills than beginners. And the characteristics of effective motions for making a diagnosis of prostate cancer and hypertrophy are extracted.
J2410206 Study on evaluation of mobility of lump in the flexible object

OIZUMI Jin, UBE Tetsuharu, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2014　J2410206　2014

DOI： 10.1299/jsmemecj.2014._J2410206- 　

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Palpation is a simple diagnosis method that doctors examine body and organs of patients by feeling with their hand. However, palpation is not objective because the palpation sensitivity depends on skill and experiences of doctors. Therefore, an objective method for measuring tactile information is required. In previous studies, a tactile sensor which can measure the mobility of tumors is proposed. Mobility is important information to determine the malignancy of tumors. In this study, to investigate mobility of abnormalities, we performed sensory evaluation and the tactile sensor evaluation using palpation models with abnormality. From the comparison of the results, it was found that there is a strong correlation between mobility evaluated by the tactile sensor and mobility by humans Therefore, it is confirmed that the sensor is available to evaluate the mobility that humans feel.
Measurement of Finger Joint Angle using a Soft Polymer Sensor

OTSUKI Manabu, KOBAYASHI Kohei, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2014　J1620105　2014

DOI： 10.1299/jsmemecj.2014._J1620105- 　

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This study aims to develop a novel measurement system for the finger joint angle by using a soft polymer sensor, which enables easier evaluation of human motion. In the rehabilitation, it is important to evaluate human motion quantitatively for effective treatment. In this study, we focus on hand grip motion, which is important motion for eating and drinking. From the previous studies, it has been elucidated that the outputs from the soft polymer sensor are proportional to the mean of sensor curvatures. The sensor has good flexibility. Therefore, finger bending motion can be measured by attaching the sensor on the finger joint. To obtain the relationship between sensor outputs and finger joint angles, the sensor outputs during grasping motion is compared with the finger joint angles measured by VICON which is the 3D motion capture system. From the results, it is proved that this system is useful to measure the finger joint angle.
Measurement on palpation motion for discriminating the lump shape

YOKOYAMA Shota, OKUYAMA Takeshi, TANAHASHI Yoshikatsu, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2014　F-2-5　2014

DOI： 10.1299/jsmeiip.2014._F-2-5-1_ 　

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Physician palpation is a useful medical examination, because it is non-invasive, quick and simple. However, to make an accurate diagnosis using palpation, physicians need long-time training and practice. Moreover, it is difficult for beginners to learn how to make a motion on palpation and what to feel at that time. Therefore, this study aims to clarify the relationship between the palpation motions and haptic sense, and to support beginners to improve the palpation skill. At first, models for palpation are designed. Each model has a hard lump made of silicone in soft polyurethane resin. The models are of seven types. The difference among them is the forms of lumps. Next, a measurement system for palpation motion is developed. The system has two cameras and a load cell. Subjects explore the models like conducting palpation, and then answer the lump forms. In experiments, palpation motion data of ten subjects are obtained by using the measurement system. The characteristics of the motion were extracted from the experiment data. And, it is confirmed that the instruction for the effective motions improves palpation skill.
化粧水の塗布触感評価システムの開発に関する研究

奥山武志, 榎並祥太, 川副智行, 柿澤みのり, 田中真美

第25回「電磁力関連のダイナミクス」シンポジウム　226-227　2013
ヒトの硬軟感知覚メカニズムに関する研究-第2報：硬軟感知覚における接触面積の影響

土見大介, 佐々木香菜, 奥山武志, 田中真美

第25回「電磁力関連のダイナミクス」シンポジウム　224-225　2013
紙オムツによる乳幼児への触刺激の定量化に関する研究

谷口雄紀, 野俣拓也, 奥山武志, 田中真美

第22回MAGDAコンファレンスin宮崎講演論文集　2013
音呈示による食感制御システムの開発に関する研究

成井涼, 奥山武志, 田中真美

第22回MAGDAコンファレンスin宮崎講演論文集　2013
柔軟ポリマーセンサを用いた指関節角度計測による把持動作評価

大槻学, 奥山武志, 田中真美

第22回MAGDAコンファレンスin宮崎講演論文集　541-546　2013
F-2-3 Analysis of the pressure on the fingers and palms of midwife during second stage of labor

KUDO Miu, OKUYAMA Takeshi, TANAKA Mami, HOJO Maki, YOSHIZAWA Toyoko, NAKAMURA Yasuka

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2013　(0)　143-145　2013
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeiip.2013.143 　

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In Japan,midwives perform Japanese hands-on(perineal support),which is important to prevent perineal tears and to deliver safely.However,it is difficult for trainee midwives to acquire the procedures.Therefore,the advanced delivery simulator that enable the midwives to evaluate the skill objectively is demanded.In this paper,for realizing the delivery simulator,we focus on the pressure of midwives' fingers and palms during Japanese hands-on.Fundamental experiments were carried out using flexible pressure sensors.In experiments,six experts perform the Japanese hands-on using normal delivery phantom.From the analysis of pressure profile,the cooperation between the left and right hand was investigated.
Development of a Haptic Sensor System for Simultaneously Measuring Roughness and Stiffness

KUBO Masaru, OKUYAMA Takeshi, TSUCHIMI Daisuke, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　2013　140-142　2013

DOI： 10.1299/jsmeiip.2013.140 　

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Skin is considered to be the reflection of one's health,and therefore,monitoring skin condition is important in diagnosing an illness.Palpation is a physical examination,which involves examination of the skin condition by using feeling of touch.The issue associated with the palpation is that it is subjective and therefore causes difficulties such as repetition and exchange of information.To deal with this,sensor systems capable of measuring the skin condition in various parts of the body are demanded.The previously developed sensor system was able to measure both roughness and stiffness of the human skin but not simultaneously.In this paper,a handheld haptic device,focusing on simultaneously measuring the roughness and stiffness of the human skin is developed using a PolyVinylidene DiFluoride(PVDF) film and strain gauges as sensory elements.
Muscle states evaluation by measuring multipoint mechanomyogram

ARAI Tatsuya, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2013　J241035　2013

DOI： 10.1299/jsmemecj.2013._J241035-1 　

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In recent years, aging of population is more and more progressing. The number of people who is bedridden is increasing because muscle strength and muscle mass decrease as people age. Therefore, rehabilitation and training are needed for independent lives. In order to improve their safety and efficiency, it is important to measure the state of muscle activity and muscle fatigue. Mechanomyogram (MMG) is one of the invasive method to evaluate a state of muscle. In addition, measuring surrounding muscles simultaneously is necessary to evaluate effects of rehabilitation and training because motions are performed by some muscles. Therefore, in this study, the state of crural muscles in isometric contraction was measured by multipoint MMG. Four sensors were taped on medial head of gastrocnemius muscle, lateral head of gastrocnemius muscle, tibialis anterior and the shinbone. Root mean squares and power spectral densities (PSD) were calculated from MMG signal to measure muscle activity. By comparing PSDs from four sensors, there are different frequency components in PSD from medial head from that from lateral head. From the results, it was found that the multiple MMG measurement is available to estimate the whole muscle activity during exercise.
Development of a reciprocating roller scanning type palpation sensor

UBE Tetsuharu, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2013　J241025　2013

DOI： 10.1299/jsmemecj.2013._J241025-1 　

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Palpation is a simple diagnosis method that doctors examine body and organs of patients by feeling with their hand. However, palpation is not objective because the palpation sensitivity depends on skill and experience of doctors. Therefore, an objective method for measuring tactile information is required. In related studies, the tactile sensor which can measure the size, the hardness and the position of a tumor is proposed. However, there is no system that can measure the mobility of a tumor which is fundamental information in a diagnosis by palpation. In this study, a palpation sensor system for evaluating the mobility of a tumor is fabricated. In measurement, the sensor measures the reaction force from the measuring object, while the sensor scans on the object. In reference to the motion of the doctor's hand during palpation, the sensor reciprocates above the tumor. By the reciprocating scanning, the waveforms with two peaks are obtained in the sensor output. Compared the time gap between the two peaks with the displacement of the tumor, it is found that the time gap is strongly related to the displacement. From the results, it is confirmed that the sensor is available to evaluate the mobility of a tumor.
Study on a palpation motion measurement using camera and load cell

YOKOYAMA Shota, OKUYAMA Takeshi, TANAHASHI Yoshikatsu, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2013　J241013　2013

DOI： 10.1299/jsmemecj.2013._J241013-1 　

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Physician palpation is a useful medical examination because it is non-invasive, quick and simple. However, to make an accurate diagnosis using palpation, physicians need long-time training and practice. Moreover, it is difficult for beginners to learn how to make a motion on palpation and what to feel at that time. Therefore, this study aims to clarify the relationship between the motion of palpation and haptic sense, and to support beginners to improve the palpation skill. At first, models for palpation are designed. Each model has a hard lump made of silicone in soft polyurethane resin. The models are of seven types. The difference among them is the forms of lumps. Next, a measurement system for palpation motion is developed. The system has two cameras and a load cell. Subjects explore the models like conducting palpation, and then answer the lump forms. In experiments, palpation motion data of nine subjects are obtained by using the measurement system. The characteristics of the motion were extracted from the experiment data.
Development of roll-type contact stimulus measurement system

OKUYAMA Takeshi, NOMATA Takuya, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2013　J164016　2013

DOI： 10.1299/jsmemecj.2013._J164016-1 　

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This paper describes development of a roll type contact stimulus evaluation system. In this study, contact force applied on skin with diaper and diaper friction are measured as the contact stimulus. First, in order to measure the contact stimulus, contact stimulus sensor is fabricated. The sensor comprises a polyvinylidene difluoride (PVDF) film and strain gauge. Next, roll type contact stimulus evaluation system is designed. In the system, roundish body part of infants such as hip is simplified into cylindrical shape. The relative motion of the hip joint is simplified into rotational motion of the cylinder. Based on the features of sensor outputs, some parameters are proposed in order to evaluate the contact stimulus. Then, three kinds of commercial disposable diaper are used as measuring objects. Sensory test about contact stimulus of the diapers are carried out on adults. And using the developed roll-type system, measurement of the diapers are conducted. By comparing the sensory evaluation value with the evaluation parameters calculated from sensor output, it is found that some evaluation parameters for the diaper obtaining the strongest "prickly sensation" and "irritated sensation" are bigger than others. From the results, it is confirmed that the developed system is useful for estimation of contact stimulus.
硬さ知覚におよぼす聴覚情報の影響 : 信号検出理論を用いた検討(日本基礎心理学会第31回大会,大会発表要旨)

鈴木結花, 奥山武志, 田中真美

基礎心理学研究　31　(2)　227-227　2013
Publisher: 日本基礎心理学会
DOI： 10.14947/psychono.KJ00008685363 　
柔軟曲率センサの時間応答特性

大槻学, 奥山武志, 田中真美

第24回「電磁力関連のダイナミクス」シンポジウム　607-608　2012
触感計測用センサシステムの開発に関する研究

八木喜久, 奥山武志, 横幕敦司, 田村明日香, 田中真美

第21回MAGDAコンファレンスin仙台講演論文集　563-566　2012
Measurement of human scratch motion

奥山武志, 畠山一樹, 田中真美

Cold Region Technology Conference proceedings　28　456-459　2012
Publisher: 北海道開発技術センター
ISSN： 1883-3489
Study on development of a measurement system for palpation motion

TANAKA Mami, MURAKAMI Kentaro, OKUYAMA Takeshi

The Proceedings of Mechanical Engineering Congress, Japan　2012　J241023　2012

DOI： 10.1299/jsmemecj.2012._J241023-1 　
Development of a roller scanning type palpation sensor

OKUYAMA Takeshi, TAMURA Makoto, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2012　J241022　2012

DOI： 10.1299/jsmemecj.2012._J241022-1 　
Measurement of touch feeling for artificial hairs using a tactile sensor

YAGI Yoshihisa, OKUYAMA Takeshi, KON Yusuke, OTSUKA Sho, KAKIZAWA Minori, NAKATANI Masashi, TOYODA Naruhito, KAWASOE Tomoyuki, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2012　J165056　2012

DOI： 10.1299/jsmemecj.2012._J165056-1 　
Mechanomyographic Spectrogram for Monitoring of Crural Muscle Activity

TSUCHIMI Daisuke, SHINDO Masashi, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of Mechanical Engineering Congress, Japan　2012　J165054　2012

DOI： 10.1299/jsmemecj.2012._J165054-1 　
Study on the Mechanisms of Human Haptic Perception for Evaluating Softness : First Report: Effectiveness of Pressing Force and Displacement for Softness

Sasaki Kana, Tsuchimi Daisuke, Okuyama Takeshi, Tanaka Mami

The Proceedings of the JSME Conference on Frontiers in Bioengineering　2012　175-176　2012

DOI： 10.1299/jsmebiofro.2012.23.175 　
Study of MMG and EMG Sensor System for Muscle Activity Monitoring

Arai Tatsuya, Shindo Masashi, Okuyama Takeshi, Tanaka Mami

The Proceedings of the JSME Conference on Frontiers in Bioengineering　2012　173-174　2012

DOI： 10.1299/jsmebiofro.2012.23.173 　
Study on nail-mounted small microphone for measuring human scratching motion

Hatakeyama Kazuki, Okuyama Takeshi, Tanaka Mami

The Proceedings of the JSME Conference on Frontiers in Bioengineering　2012　31-32　2012

DOI： 10.1299/jsmebiofro.2012.23.31 　
触覚・触感に基づくQOLテクノロジーの創出

田中真美, 奥山武志, 土見大介

ナノ医工学年報　5　(1)　171-180　2011
Publisher: 東北大学グローバルCOEプログラム「新世紀世界の成長焦点に築くナノ医工学拠点」
ISSN： 1882-4692
Study on usability of Braille sensor

SEKI Hiroki, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　247-248　2011

DOI： 10.1299/jsmeiip.2011.247 　
Study on a nail-mounted sensor for measuring hardness

OTAKI Takuo, OKUYAMA Takeshi, TANAHASHI Yoshikatsu, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　245-246　2011

DOI： 10.1299/jsmeiip.2011.245 　
Effect of Stiffness for Evaluation of Skin Hardness

TSUCHIMI Daisuke, OKUYAMA Takeshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　243-244　2011

DOI： 10.1299/jsmeiip.2011.243 　
分娩介助動作計測評価に関する研究

北條真紀, 奥山武志, 吉沢豊子, 田中真美

日本機械学会東北支部第47期秋季講演会講演論文集　72-73　2011
引っかき動作による振動現象の計測に関する研究

畠山一樹, 奥山武志, 田中真美

日本機械学会東北支部第47期秋季講演会講演論文集　74-75　2011
体内異常部位検知用システムの開発に関する研究

田村誠, 奥山武志, 田中真美

精密工学会2011年度東北支部学術講演会　31-32　2011
触覚・触感に基づくQOLテクノロジーの創出

田中真美, 奥山武志, 士見大介

ナノ医工学年報　4　(1)　161-170　2010
Publisher: 東北大学グローバルCOEプログラム「新世紀世界の成長焦点に築くナノ医工学拠点」
ISSN： 1882-4692
Fundamental characterization of a contact stimulus by diapers

NOMATA Takuya, OKUYAMA Takeshi, TERAOKA Hiromi, MURAKAMI Yasuo, MIYAZAWA Kiyoshi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　173-174　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeiip.2010.173 　

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This paper describes an investigation of fundamental characterization of a contact stimulus by diapers. Contact stimulus is a kind of mechanical stimulus like contact force or friction. A sensor for measuring the contact stimulus is fabricated. The polyvinylidene fluoride (PVDF) film, which is a kind of piezoelectric material, and a strain gauge are used as the sensor parts. In order to investigate relationship between the contact stimulus and the sensor outputs, a machine which can give rise to the contact stimulus between the sensor and diapers by rotating the sensor is developed. By using this machine, friction between the sensor and a diaper is measured. A parameter calculated from the PVDF film outputs is proposed for evaluating friction. It was confirmed that there is a possibility to evaluate friction of diaper aginst the sensor by the proposed parameter.
Study on the identification of special characters by Braille sensor

OKUYAMA Takeshi, SATO Hirokazu, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　171-172　2010

DOI： 10.1299/jsmeiip.2010.171 　
P-17 Characteristic evaluation of a solid polymer electrolyte sensor

OTSUKI Manabu, OKUYAMA Takesi, TANAKA Mami

The Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP　169-170　2010

DOI： 10.1299/jsmeiip.2010.169 　
Study on an evaluation of crural muscle activity using a mechanomyogram sensor

SATO Hirokazu, OKUYAMA Takeshi, TANAKA Mami

The proceedings of the JSME annual meeting　2010　107-108　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.5.0_107 　

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This paper describes a development of a measurement system for monitoring muscle activities of gastrocnemius muscle using a mechanomyogram (MMG) sensor. The measurement system is composed of MMG sensor, load cell and monitoring display. In MMG measurement of gastrocnemius muscle, the subjects sit on the measurement system in the long sitting position and perform a leg isometric constraction against a footboard with load cell. In experiment, for stable and reproducible measurement, proper footboard angle and proper force stepping on the footboard are investigated. First, to decide proper footboard angle, MMG measurement are carried out under conditions with three kind of footboard angle. Next, to decide proper exerting force, MMG measurement are carried out under conditions with three kind of force. As a result, it is found that the MMG measurement can be carried out stably and reproducibly under conditions that footboard angle is π/9[rad], and force is 7[%] of maximum voluntary contraction.
Development of hair touch feeling sensor using an plate imitating a scalp hair surface

OKUYAMA Takeshi, KON Yusuke, KAWASOE Tomoyuki, TOYODA Naruhito, NAGANO Tanemasa, KAKIZAWA Minori, NAKATANI Masashi, TANAKA Mami

The proceedings of the JSME annual meeting　2010　105-106　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.5.0_105 　

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In this paper, a sensor system for evaluating tactile feelings of scalp hair is developed. A sensor with concentric circles shape projection which imitates fingerprint was mounted on a beam that was fixed to a linear slider. A Polyvinylidene Fluoride (PVDF) film was used as a sensory part. The sensor output was obtained by contacting with the measuring object and scanning on it. Three parameters that are expected to have correlations with tactile feelings were calculated by signal processing of sensor outputs. Evaluation of human hair has problems due to randomicity and difficulty of putting them uniformly without overlapping. Therefore, a plate imitating the physical and chemical properties of human hair surface was used as measuring objects for stable measurement. The plates cleaned down with several kinds of treatment were measured by the sensor and human sense. By comparison between sensor outputs and sensory evaluation, it is confirmed that the sensor system can discriminate the treatment effects. The results suggest that these factors could be evaluated by the sensor system.
触診動作計測用指力センサに関する研究

奥山武志, 田村誠, 田中真美

第19 回MAGDAコンファレンス講演論文集　195-196　2010
触知覚メカニズムを応用した粗さ感計測用触覚センサの開発

土見大介, 奥山武志, 田中真美

第19 回MAGDAコンファレンス講演論文集　203-204　2010
触覚・触感に基づくQOLテクノロジーの創出

田中真美, 奥山武志, 棚橋善克

ナノ医工学年報　3　(1)　159-168　2009
Publisher: 東北大学グローバルCOEプログラム「新世紀世界の成長焦点に築くナノ医工学拠点」
ISSN： 1882-4692
Property evaluation of an artificical esophagus with peristaltic motion using shape memory alloy

三木寛之, 奥山武志, 小平真吾

The Memoirs of the Institute of Fluid Science,Tohoku University　20　27-34　2009
Publisher: 東北大学流体科学研究所
ISSN： 0916-2860
Development of a solid polymer electrolyte sensor

OTSUKI Manabu, OKUYAMA Takesi, KOMIYA Ryouta, SUGOH Nozomu, TANAKA Mami

The proceedings of the JSME annual meeting　2009　173-174　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.5.0_173 　

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This paper describes a development of a polymer sensor using solid polymer electrolyte (SPE) film. The sensor has a basic structure that a SPE film is sandwiched between thin carbon films and conductive tape is attached on each carbon film. SPE film has a good flexibility, and can be used in air. First, output response to deformation is confirmed by applying the displacement to the sensor. Then a curvature sensor using the material is proposed. In experiments, it is found that the proposed sensor is available to measure the curvature directly.
A study on quantifying a contact stimulus of diapers to infants

NOMATA Takuya, OKUYAMA Takeshi, TERAOKA Hiromi, MURAKAMI Yasuo, MIYAZAWA Kiyoshi, TANAKA Mami

The proceedings of the JSME annual meeting　2009　171-172　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.5.0_171 　

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In this study, a sensor system for measurement of a contact stimulus of diapers to infants is developed. The polyvinylidene fluoride (PVDF) film, which is a kind of piezoelectric material and strain gauge are used as the sensor materials. The sensor consists of a surface contact layer, PVDF film, a strain gauge and an aluminum plate. First, the sensor is located on a silicone block and the upper of the sensor part is rubbed with acrylic finger, the sensor performance is investigated. Next, the sensor is attached on a doll simulated a infant. The doll is made a walking motion and measures a contact stimulus without or with a diaper. It was found that there is a possibility that this sensor can quantify a contact stimulus of diapers for infants.
Study on evaluation of muscle conditionsusing a mechanomyogram sensor

TANAKA Mami, SAITOU Kazuhiro, OKUYAMA Takesi, NAGATOMI Ryoichi

The proceedings of the JSME annual meeting　2009　209-210　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.6.0_209 　

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In this study, a mechanomyogram (MMG) sensor system for monitoring muscle conditions is developed. The polyvinylidene fluoride (PVDF) film is used as the sensory receptor of the MMG sensor. The sensor performance is verified by the fundamental experiment. The results show that the mean power frequency (MPF) of the sensor output is related to firing rate of action potential (AP) of muscle and the variance of the sensor output is related to the activity of fast fibers and complete recruitment. Next, muscle activities of isometric contraction are studied using the developed MMG sensor before and after muscle fatigue. Measurements were conducted on biceps and triceps brachii of healthy subjects with load. Experimental results show that contraction of fast fibers is occurred earlier and fast fibers activity increase earlier due to muscle fatigue. Focusing on the time shift of local maximum point in MPF and decrease of growth rate in variance, parameters for evaluation of muscle fatigue degree are proposed.
Development of nail mounted palpation sensor

OKUYAMA Takeshi, OTAKI Takuo, TANAHASHI Yoshikatsu, TANAKA Mami

The proceedings of the JSME annual meeting　2009　207-208　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.6.0_207 　

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In this paper, a nail mounted palpation sensor is developed in order to perform a palpation by hand and stiffness measurement by a sensor simultaneously. The polyvinydene fluoride (PVDF) film. which is a kind of piezoelectric materials, is used as the sensor material. The sensor consists of a PVDF film, silicone sheet and a false nail. PVDF film was glued to silicone sheet, and is attached on artificial nail. The whole sensor part is fitted to finger nail with double-sided tape. In measurement, the finger is vibrated by a vibro-machine fitted to the root of the finger and the sensor output is obtained by contacting the finger tip on the objects. The fundamental characteristic and possibility of stiffness measurement are investigated using the silicone rubber samples with Young's modulus corresponding to prostatic cancer and normal prostate. The experimental results showed that magnitude of output voltage is corresponded with the stiffness of sample. It is confirmed that the nail mounted palpation sensor is possible to discriminate the stiffness by experiments.
紙オムツによる乳幼児への触刺激の定量化に関する研究 −歩行動作時用計測システムの構築と検討−

野俣拓也, 奥山武志, 寺岡裕美, 村上康郎, 宮澤清, 田中真美

第18回MAGDAコンファレンス講演論文集　179-182　2009
触覚感性計測用センサシステムの開発に関する研究-ヒトの触動作およびセンサシステムの性能調査-

小林秀光, 野俣拓也, 奥山武志, 田中真美

第20回電磁力関連のダイナミクスシンポジウム講演論文集　497-500　2008
皮膚性状計測用小型センサシステムの開発

土見大介, 奥山武志, 田中真美

第20回電磁力関連のダイナミクスシンポジウム講演論文集　493-496　2008
乾湿両状態で計測可能な毛髪手触り感センサの開発

針生誠, 近雄介, 奥山武志, 柿澤みのり, 川副智行, 清水秀樹, 田中真美

第20回電磁力関連のダイナミクスシンポジウム講演論文集　489-492　2008
Development of an Artificial Esophagus with Peristaltic Motion using Shape Memory Alloy Actuators

MIKI Hiroyuki, KODAIRA Shingo, LUO Yun, TAKAGI Toshiyuki, YAMBE Tomoyuki, OKUYAMA Takeshi

The proceedings of the JSME annual meeting　2008　403-404　2008

DOI： 10.1299/jsmemecjo.2008.6.0_403 　
Development of a compact sensor system for reading Braille : Consideration of operation performance

KON Yusuke, TANAKA Mami, OKUYAMA Takeshi

The proceedings of the JSME annual meeting　2008　263-264　2008
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2008.5.0_263 　

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This paper is concerned with the development of the wearable sensor system for recognizing Braille. We have developed a compact wearable sensor using a PVDF (Polyvinylidene Fluoride) film. The sensor output is measured with the sensor mounted onto a fingertip moving over Braille manually. The operation examination for visually-impaired and normal who are blindfolded is carried out and the results that they can't use the sensor easily is obtained. In order to solve this problem, the form of sensor is improved based on the opinions of the operators. Then the operation examination with improved sensor is carried out again, The obtained results show that the improved sensor has the advancement of handleability.
Development of a haptic sensor for evaluation of hair conditions

OKUYAMA Takeshi, HARIU Makoto, KAKIZAWA Minori, KAWASOE Tomoyuki, SHIMIZU Hideki, TANAKA Mami

The proceedings of the JSME annual meeting　2008　259-260　2008
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2008.5.0_259 　

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In this paper, a haptic sensor system for evaluation of human hair under dry and wet conditions is developed. The polyvinydene fluoride (PVDF) film, which is a kind of piezoelectric materials, is used as the sensory receptor. The sensor consists of acrylic base, a silicone rubber, a PVDF film, and projections for the contact to objects. The sensor output is obtained by contacting and scanning of the sensor on the objects. Panels imitating the physical and chemical properties of human hair are fabricated and used as measuring objects for stable measurement. The surface of the sensor projection and sensor structure are improved in order to measure under wet condition as well as under dry condition. Panels cleaned by hair care products are evaluated by the improved sensor, and the sensor outputs are compared with human sensory evaluation. It is confirmed that the sensor outputs have a clean correlation with human evaluation.
Development of a haptic sensor system for monitoring human skin conditions

TSUCHIMI Daisuke, OKUYAMA Takeshi, TANAKA Mami

The proceedings of the JSME annual meeting　2008　257-258　2008
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2008.5.0_257 　

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Human skin, which mainly consists of epidermis, dermis and hypodermis, is the largest organ of a human body. It has a lot of roles, for example, protection function, moisture maintenance function, and sensory function. Moreover, it becomes a parameter that shows the health condition and beauty, because the skin is the outermost layer of a human body. Therefore, the development of the sensor that can measure the skin conditions in various parts of the body is demanded. However, sensors that had been developed before can measure limited parts of body or can measure only in limited condition. In this paper, the sensor that can measure various parts of human body in various conditions is developed and evaluated by measurement of the artifical skins that have various hardness and roughness.
筋状態評価用筋音センサシステムの開発

田中真美, 齊藤一博, 奥山武志

第17回MAGDAコンファレンス講演論文集　187-188　2008
二層型PVDF小型生体硬さ評価用センサに関する研究

奥山武志, 曽根美紀子, 長南征二, 田中真美

第17回MAGDAコンファレンス講演論文集　185-186　2008
PVDFフィルムを用いた小型生体硬さ評価用センサに関する研究

奥山武志, 曽根美紀子, 王鋒, 棚橋善克, 長南征二, 田中真美

平成20年度日本設計工学会東北支部研究発表会　51-52　2008
Investigation of ultrasonic wave propagation in Inconel weld zone

OKUYAMA Takeshi, FUKUTOMI Hiroyuki, LIN Shan, OGATA Takashi

第12回動力・エネルギー技術シンポジウム講演論文集　2007　23-26　2007

DOI： 10.1299/jsmepes.2007.12.23 　
Proposal of a control system for a SMA manipulator

KODAIRA Shingo, OKUYAMA Takeshi, MIKI Hiroyuki, LUO Yun, YAMAGUCHI Mitsuyoshi, HIGA Masaru, TAKAGI Toshiyuki

日本機械学会東北支部第41期総会・講演会講演論文集　2006　201-202　2006

DOI： 10.1299/jsmeth.2006.41.201 　
Evaluation of an artificial esophagus with peristalsis using shape memory alloy

YAMAGUCHI Mitsuyoshi, OKUYAMA Takeshi, TAKAGI Toshiyuki, YAMBE Tomoyuki, MIKI Hiroyuki

日本機械学会東北支部第41期総会・講演会講演論文集　2006　(41)　195-196　2006
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeth.2006.41.195 　
形状記憶合金を用いた人工食道の蠕動運動機構の提案

山口満義, 奥山武志, 高木敏行, 山家智之, 羅雲, 関根一光, 三木寛之

第14回MAGDAコンファレンス講演論文集　58-61　2005
In vivo 押し込み試験による腸の力学的特性評価

奥山武志, 比嘉昌, 羅雲, 高木敏行

第19 回バイオメカニズム・シンポジウム　321-328　2005
Modeling of deformation behavior concerned with structural phase transformation for shape memory alloy

OKUYAMA Takeshi, LUO Yun, Matsumoto Minoru, TAKAGI Toshiyuki

日本機械学会第17回計算力学講演会講演論文集　167-168　2004
Eddy Current Monitoring Aiming at Evaluation of Crack Propagation in Structural Components of Nuclear Power Plants

KASUYA Takashi, OKUYAMA Takeshi, ENDO Hisashi, UCHIMOTO Tetsuya, TAKAGI Toshiyuki, SHOJI Tetsuo

日本機械学会2004年度年次大会講演論文集　2004　187-188　2004
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2004.3.0_187 　

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This paper discusses the capability of Eddy Current Monitoring (ECM) system as a in-situ evaluation method of crack propagation in a Boiling Water Reactor (BWR) environment. The ECM experiment with the eddy current probes on the outer surface of a large-scale pipe specimen, demonstrates the capability to monitor the propagation of cracks introduced from the inner surface of the specimen in a simulated BWR environment. The numerical simulation of eddy current signals shows that the experimental signals can explain the crack propagation. This provides that the ECM system is an effective method to evaluate the crack growth quantitatively.
Development of a Peristaltic Element Using Shape Memory Alloy

YAMAGUCHI Mitsuyoshi, LUO Yun, TAKAGI Toshiyuki, OKUYAMA Takeshi

日本機械学会東北支部第39期総会・講演会講演論文集　174-175　2004

DOI： 10.1299/jsmeth.2004.39.174 　
高温環境渦電流モニタリングによるき裂進展の定量的評価

糟谷高志, 奥山武志, 内一哲哉, 高木敏行, 盧勇剛, 庄子哲雄

第13回MAGDAコンファレンス講演論文集　451-454　2004
BWR環境下での渦電流モニタリングによるIn-situき裂進展評価の検討

糟谷高志, 奥山武志, 遠藤久, 内一哲哉, 高木敏行, 庄子哲雄

日本保全学会第１回学術講演会要旨集　141-145　2004
高温環境下における渦電流モニタリングの可能性の検討

糟谷高志, 奥山武志, 内一哲哉, 高木敏行, 盧勇剛, 庄子哲雄

表面探傷技術による健全性診断に関するシンポジウム　17-23　2004
FEMを用いた人工肛門括約筋設計支援

比嘉昌, 羅雲, 山家智之, 天江新太郎, 西功太郎, 奥山武志, 高木敏行, 林富

日本人工臓器学会　33　(2)　s-222　2004
Development of a temperature control system for the complete implantation SMA artificial anal sphincter

OKUYAMA Takeshi, LUO Yun, TAKAGI Toshiyuki, NISHI Kohtaro, WADA Motoshi, YAMBE Tomoyuki, KAMIYAMA Takamichi

日本機械学会東北支部第38期総会・講演会講演論文集　166-167　2003

DOI： 10.1299/jsmeth.2003.38.166 　
Development of Auxiliary Sphincters using Shape Memory Alloys

KOMORIYA Toshihiko, OKUYAMA Takeshi, LUO Yun, TAKAGI Toshiyuki

日本機械学会東北支部第38期総会・講演会講演論文集　164-165　2003
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmeth.2003.38.164 　
Proposal of a U-shaped SMA Artificial Anal Sphincter

OKUYAMA Takeshi, LUO Yun, Hayashi Junko, TAKAGI Toshiyuki

日本機械学会東北支部第37期総会・講演会講演論文集　142-143　2002

DOI： 10.1299/jsmeth.2002.37.142

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Books and Other Publications 2

衛生製品とその材料開発事例集

奥山武志

（株）技術情報協会　2016/12

ISBN: 9784861046377
アクチュエータ研究開発の最前線

田中真美, 奥山武志

株式会社エヌ・ティー・エス　2011/08/08

Presentations 61

Study on mechanical characteristics estimation of scratching motion against skin

OKUYAMA Takeshi, WATANABE Keisuke, TANAKA Mami

2019/09/11
引掻き強さ評価のためのマイクセンサシステムの開発

奥山武志, 磯﨑剛志郎, 田中真美

日本機械学会2018年度年次大会　2018/09/11
柔らかさ知覚の解明に向けた取り組み Invited

奥山武志

第48回繊維学会夏季セミナー　2018/08/10
前立腺触診用柔軟フィンガシステムの開発―ワイヤ張力によるフィンガ先端の接触力推定

奥山武志, 岡前雄大, 田中真美

計測自動制御学会システムインテグレーション部門講演会SI2017　2017/12/22
Study on Fingertip Force Sensor Based on Measurement of Tendon Tension International-presentation

Takeshi OKUYAMA, Kouhei KOBAYASHI, Mami TANAKA

18th International Symposium on Applied Electromagnetics and Mechanics　2017/09/06
指輪型指先力計測センサの開発

奥山武志, 小林晃平, 田中真美

第29回「電磁力関連のダイナミクス」シンポジウムin長野　2017/05/19
前立腺触診用柔軟フィンガシステムの開発―フィンガ部の力学特性評価―

奥山武志, 岡前雄大, 田中真美

日本機械学会ロボティクス・メカトロニクス講演会　2017/05/10
ウェアラブル指先力計測センサシステムの開発

奥山武志, 小林晃平, 田中真美

日本機械学会2016年度年次大会　2016/09/11
人肌に対する引掻き音計測および動作評価に関する研究

奥山武志, 阿部貴夫, 田中真美

第28回「電磁力関連のダイナミクス」シンポジウムin横浜　2016/05/18
生体計測に基づく医療福祉工学 Invited

奥山武志

北東北ナノメディカルクラスター研究会ウインターキャンプ　2015/12/26
手背マイクによる引掻き動作計測に関する研究

奥山武志, 阿部貴夫, 田中真美

日本機械学会第７回マイクロ・ナノ工学シンポジウム　2015/10/28
Measurement of Finger Joint Angle using a Flexible Polymer Sensor International-presentation

Takeshi OKUYAMA, Shouhei KOBAYASHI, Manabu OTSUKI, Mami Tanaka

17th edition of the International symposium on Applied Electromagnetics and Mechanics　2015/09/17
3次元動作計測システムおよび3軸力センサによる引掻き動作の基礎的解析

奥山武志, 阿部貴夫, 田中真美

日本機械学会2015年度年次大会　2015/09/16
Frequency response of polymer sensor for measuring finger scratching motion International-presentation

Takeshi Okuyama, Shota Yokoyama, Yoshikatsu Tanahashi, Mami Tanaka

2015 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment　2015/06/16
3次元動作解析システムを用いた前立腺触診動作計測に関する研究

奥山武志, 横山翔太, 棚橋善克, 田中真美

第27回「電磁力関連のダイナミクス」シンポジウム　2015/05/14
機能性材料の医療福祉への応用 Invited

OKUYAMA Takeshi

日本材料学会第 38 回生体・医療材料部門委員会　2015/01/20
前立腺触診動作の計測に関する研究

奥山武志, 横山翔太, 棚橋善克, 田中真美

日本機械学会2014年度年次大会　2014/09/08
Frequency response of polymer sensor for measuring finger scratching motion International-presentation

Takeshi Okuyama, Kazuki Hatakeyama, Mami Tanaka

8th Asia-Pacific Symposium on Applied Electromagnetics and Mechanics　2014/07/24
引っ掻き音計測による引っ掻き動作評価に関する研究

奥山武志, 畠山一樹, 田中真美

第26回「電磁力関連のダイナミクス」シンポジウム　2014/05/23
機能性材料を用いた医療福祉センサシステムの開発～手軽に使ってもらえる点字センサを目指して Invited

OKUYAMA Takeshi

サイトワールド2013「ライフサポート学会視聴覚障害者バリアフリー技術研究会」　2013/11/03
触感計測センサシステムの開発 Invited

OKUYAMA Takeshi

第51回日本人工臓器学会大会　2013/09/28
ロール型触刺激計測システムの開発

奥山武志, 野俣拓也, 田中真美

日本機械学会2013年度年次大会　2013/09/09
Measurement of human scratch behavior using compact microphone International-presentation

Takeshi Okuyama, Kazuki Hatakeyama, Mami Tanaka

16th edition of the International symposium on Applied Electromagnetics and Mechanics　2013/08/01
化粧水の塗布触感評価システムの開発に関する研究

奥山武志, 榎並祥太, 川副智行, 柿澤みのり, 田中真美

第25回「電磁力関連のダイナミクス」シンポジウム　2013/05/16
ヒトの引っ掻き動作計測

奥山武志, 畠山一樹, 田中真美

第28回寒地技術シンポジウム　2012/10/31
走査型触診センサの開発

奥山武志, 田村誠, 田中真美

日本機械学会2012年度年次大会　2012/09/09
Development of bending sensor for monitoring of scratch motion using polymer sensor International-presentation

Takeshi OKUYAMA, Kazuki Hatakeyama, Manabu Otsuki, Mami TANAKA

2012 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment (MIPE 2012)　2012/06/18
柔軟曲率センサの時間応答特性

大槻学, 奥山武志, 田中真美

第24回「電磁力関連のダイナミクス」シンポジウム　2012/05/16
分娩介助動作計測に関する研究

奥山武志, 北條真紀, 吉沢豊子, 田中真美

第24回「電磁力関連のダイナミクス」シンポジウム　2012/05/16
Application of polymer sensor International-presentation

PI-SMART2012　2012/04/24
12. Study on the measurement of human scratch motion using nail mounted sensor International-presentation

Takeshi Okuyama, Kazuki Hatakeyama, Mami Tanaka

9th International workshop on piezoelectric materials and applications in actuators　2012/04/23
爪装着型硬さ計測用センサに関する研究

奥山武志, 大瀧拓雄, 田中真美

第23回「電磁力関連のダイナミクス」シンポジウム　2011/05/18
触診動作計測用指力センサに関する研究

奥山武志, 田村誠, 田中真美

第19 回MAGDAコンファレンス　2010/11/22
Development of a Palpation Sensor using bimorph cells -Signal processing for smoothness measurement - International-presentation

Hiroshi Nagai, Takeshi Okuyama, Mami Tanaka

21st International Conference on Adaptive Structures and Technologies　2010/10/04
毛髪表面模倣パネルを用いた毛髪手触り感計測用センサシステムの開発

奥山武志, 近雄介, 川副智行, 豊田成人, 長野種雅, 柿澤みのり, 仲谷正史, 田中真美

日本機械学会2010年度年次大会　2010/09/05
DEVELOPMENT OF TACTILE SENSOR FOR MEASURING HAIR TOUCH FEELING International-presentation

Takeshi Okuyama, Makoto Hariu, Tomoyuki Kawasoe, Minori Kakizawa, Hideki Shimizu, Mami Tanaka

ASME Information Storage and Processing Systems Conference 2010　2010/06/14
爪装着型触診センサの開発

奥山武志, 大瀧拓雄, 棚橋善克, 田中真美

第22回電磁力関連のダインダイナミクスシンポジウム　2010/05/19
点字読み取りセンサによる特殊文字の識別手法に関する研究

奥山武志, 佐藤広和, 田中真美

日本機械学会2010年度IIP部門講演会　2010/03/16
Palpation Sensor Using Two PVDF Films International-presentation

Takeshi Okuyama, Mikiko Sone, Yoshikatsu Tanahashi, Mami Tanaka

International Conference on Mechatronics and Information Technology(ICMIT2009)　2009/12/03
Development of a curvature sensor using a solid polymer electrolyte International-presentation

Takeshi OKUYAMA, Manabu OTSUKI, Ryota KOMIYA, Nozomu SUGOH, Mami TANAKA

The 14th International Symposium on Applied Electromagnetics and Mechanics(ISEM2009)　2009/09/20
爪装着型触診センサの開発

奥山武志, 大瀧拓雄, 棚橋善克, 田中真美

日本機械学会2009年度年次大会　2009/09/13
DEVELOPMENT OF A CURVATURE SENSOR USING A SOLID POLYMER ELECTROLYTE International-presentation

Takeshi OKUYAMA, Manabu OTSUKI, Ryota KOMIYA, Nozomu SUGOH, Mami TANAKA

2009 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment (MIPE 2009)　2009/06/17
毛髪手触り感計測用センサシステムによるヘアケア効果の評価に関する研究

奥山武志, 針生誠, 柿澤みのり, 川副智行, 清水秀樹, 田中真美

第21回電磁力関連のダインダイナミクスシンポジウム　2009/05/20
二層型PVDF小型生体硬さ評価用センサに関する研究

奥山武志, 曽根美紀子, 長南征二, 田中真美

第17回ＭＡＧＤＡコンファレンス　2008/11/20
PVDFフィルムを用いた小型生体硬さ評価用センサに関する研究

奥山武志, 曽根美紀子, 王鋒, 棚橋善克, 長南征二, 田中真美

設計工学会東北支部研究発表講演会　2008/10/25
毛髪手触り感計測用センサシステムによるヘアケア効果の評価に関する研究

奥山武志, 針生誠, 柿澤みのり, 川副智行, 清水秀樹, 田中真美

日本機械学会2008年度年次大会　2008/08/03
Development of an endoscopic tactile sensor using PVDF films International-presentation

Takeshi Okuyama, Mikiko Sone, Yoshikatsu Tanahashi, Seiji Chonan, Mami Tanaka

International Conference on Mechatronics and Information Technology(ICMIT2007)　2007/12/05
Development of a multi-beam laser ultrasonic system

Tetsuo Fukuchi, Hiroyuki Fukutomi, Takashi Ogata

The 27th Symposium on Ultrasonic Electronics　2006/11/15

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第27回超音波エレクトロニクスの基礎と応用に関するシンポジウム
Detection of backwall slit by laser ultrasonic technique

Hiroyuki Fukutomi, Tetsuo Fukuchi, Takashi Ogata

The 27th Symposium on Ultrasonic Electronics　2006/11/15
Modeling the mechanical behavior of an SMA manipulator International-presentation

Kumiko Yakuwa, Yun Luo, Masaru Higa, Toshiyuki Takagi

12th International Symposium on Interdisciplinary Electromagnetic, Mechanic & Biomedical Problems　2005/09/12
Characterization of the passive mechanical properties of large intestine International-presentation

Masaru Higa, Yun Luo, Takeshi Okuyama, Toshiyuki Takagi

12th International Symposium on Interdisciplinary Electromagnetic, Mechanic & Biomedical Problems　2005/09/12
Modeling the stress-induced transtion behaviour of shape memory alloy using mixture theory International-presentation

Yun Luo, Masaru Higa, Toshiyuki Takagi, Minoru Matsumoto

E-MRS 2005 Fall Meeting　2005/09/05
In vivo 押し込み試験による腸の力学的特性評

比嘉昌, 羅雲, 高木敏行

第19回バイオメカニズム・シンポジウム　2005/08/03
形状記憶合金の相変態をともなう変形挙動の

羅雲, 松本實, 高木敏行

日本機械学会第17回計算力学講演会　2004/11/18
One-dimensional modeling of stress-induced transformation behaviour of shape memory alloy International-presentation

Claire Poirier, Yun Luo, Toshiyuki Takagi, Minoru Matsumoto

The 5th Japan-France Seminar on Intelligent Materials and Structures　2004/10/13
Development of SMA Artificial Anal Sphincter; Temperature Control Syste International-presentation

Y. Luo, T. Takagi, T. Kamiyama, K. Nishi, S. Amae, T. Yambe

the First International Symposium on Intelligent Artifacts and Bio-systems　2004/02/24
In vivo temperature control of SMA artificial anal sphincter International-presentation

The fourth Asian Symposium on Applied Electromagnetics　2003/10/22
完全埋め込み型SMA人工肛門括約筋のための温度制御システムの開発

羅雲, 高木敏行, 西功太郎, 和田基, 山家智之, 神山隆道

第12回MAGDAコンファレンス　2003/03/27
完全埋め込み型SMA人工肛門括約筋のための温度制御システムの開発

羅雲, 高木敏行, 西功太郎, 和田基, 山家智之, 神山隆道

日本機械学会東北支部第38期総会・講演会　2003/03/15
Application of SMAs with Two-way Shape Memory Effect to Artificial Anal Sphincters International-presentation

The First World Congress on Biomimetics and Artificial Muscles　2002/12/09
U字型SMA人工肛門括約筋の提案

羅雲, 高木敏行, 林純子

日本機械学会東北支部第37期総会・講演会　2002/03/16

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Industrial Property Rights 4

触感測定システム

田中真美, 奥山武志

特許第7403770号

Property Type: Patent
触刺激測定装置

Mami Tanaka, Takeshi OKUYAMA

特許第5376588号

Property Type: Patent
硬さ測定装置

田中真美, 奥山武志

Property Type: Patent
表面傷検出用超音波探傷方法及び装置

福地哲生, 奥山武志, 福冨広幸, 緒方隆志

第5295531号

Property Type: Patent

Research Projects 5

Construction of ring-type fingertip force measurement technology without preventing fingertip sensation and movement

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2020/04/01 - 2023/03/31
筋腱張力推定による指先力計測手法の創出 Competitive

奥山武志

System: 科学研究費補助金挑戦的萌芽研究

2014/04 - 2017/03
Development of wearable scratching monitoring system Competitive

OKUYAMA Takeshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (B)

Institution: Tohoku University

2010/04 - 2014/03

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In this work, monitoring system for human scratching behavior has been developed in order to evaluate itch sensation and therapeutic process of skin disease. For this purpose, a nail-mounted scratch sound sensor, a finger bending polymer sensor, and a ring-type finger force senor were designed and the effectiveness against monitoring of scratching were verified by experiment. Additionally, relationship between sensor output from scratch sound sensor and scratch motion properties such as shear force and velocity wasinvestigated. And estimation methods of motion properties were constructed.
Evaluation and measurement of expert midwives motion during conduct labor

YOSHIZAWA Toyoko, ATOGAMI Fumi, NAKAMURA Yasuka, TANAKA Mami, OKUYAMA Takeshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2010 - 2011

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This study planned to develop a labor simulator for learning tool on basic research. The differences of the motion during the conduct of labor between students and experts were examined. The pressure sensor using pressure sensitive conductive ink was used to measure the pressure of the finger and the palm during the conduct labor. We measured the pressure during the conduct of labor on 13 students and 17 experts. Then the characteristic of the motion experts were extracted by the results from pressure sensor and motion picture. Expert mean pressure are higher than student ones and in addition the large variation of expert were showed during the conduct labor. The correlation coefficients between the pressure profiles of right hand and left hands during the delivery of the external occipital protuberance were calculated. It is founds that the best conduct labor method is frontage position method because It is the highest rate of synchronizing between right hand and lift hand during the conduct of labor.
環境適応型スマート人工肛門括約筋の開発

奥山武志

Offer Organization: 日本学術振興会

System: 科学研究費助成事業特別研究員奨励費

Category: 特別研究員奨励費

Institution: 東北大学

2004 - 2005

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本研究では、人工肛門括約筋を開発対象として、その生体と構造物との相互作用を理解することを目指す。具体的には、腸管組織の機械的特性を実験により測定する。それらの機械的特性をモデル化し、解析を行い、実験で求めることが困難な部位の圧力分布などの検討を行う。本年度は、前年度に開発した生体組織(腸管)の力学的特性の測定を行うための生体内押し込み試験機の改良を行い、より精度よく力学特性を同定するシステムを構築した。改良点としては、押し込み装置にレーザー変位計を付属し、測定部位の厚みを測定できるようにした。この改良により、押し込み圧子と腸管との接触した時点(押し込み開始時点)をより精度よく求めることができる。この改良した押し込み試験機を用いてヤギの大腸に対して生体内実験を行った。本研究で行った押し込み試験は、圧子の押し込み過程と最大押し込み量で押し込み状態をしばらく保持する過程に大別してデータ処理を行い、それぞれから腸管の非線形弾性特性と粘弾性特性を同定した。非線形弾性特性は、Mooney-Rivlinモデルを用い、粘弾性特性は2要素の一般化マクスウェルモデルを用いた。同定手法としては、まず、応力緩和曲線から粘弾性特性を同定し、押し込み過程の実験結果とMooney-Rivlinモデルとマクスウェルモデルを畳み込み積分した粘弾性特性を考慮した非線形弾性モデルを用いて同定した。これらの材料定数を用いて人工肛門括約筋の閉鎖動作を汎用有限要素解析ソフトANSYS8.1でシミュレーションした。このシミュレーションによって、人工肛門括約筋の設計と圧力分布の関係、また、圧力の時間変化を解析できることが確認できた。これらの成果は、生体組織にやさしいスマート人工肛門括約筋の実現のために必要不可欠であり、非常に有用である。

Other 2

非励磁型コイルレス磁歪リング式トルクセンサの研究開発

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磁歪トルクセンサの小型化、高感度化を行い、皮膚性状センサへ応用。
完全埋め込み型人工肛門括約筋のための知的材料システムの評価

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完全埋め込み型人工肛門括約筋の制御システム、エネルギー伝送システムの開発を行う。