Extraction of natural weight shift and foot rolling in gait based on hetero-core optical fiber load sensor

Yudai Otsuka; Yuya Koyama; Michiko Nishiyama; Kazuhiro Watanabe

doi:10.1117/12.2212492

15 March 2016 Extraction of natural weight shift and foot rolling in gait based on hetero-core optical fiber load sensor

Yudai Otsuka, Yuya Koyama, Michiko Nishiyama, Kazuhiro Watanabe

Author Affiliations +

Proceedings Volume 9754, Photonic Instrumentation Engineering III; 975405 (2016) https://doi.org/10.1117/12.2212492
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

Gait in daily activity affects human health because it may cause physical problems such as asymmetric pelvis, flat foot and bowlegs. Monitoring natural weight shift and foot rolling on plantar has been employed in order for researchers to analyze gait characteristics. Conventional gait monitoring systems have been developed using camera, acceleration sensor, gyro sensor and electrical load sensors. They have some problems such as limited measurement place, temperature dependence and electric leakage. On the other hand, a hetero-core optical fiber sensor has many advantages such as high sensitivity for macro-bending, light weight sensor element, independency on temperature fluctuations, and no electric contact. This paper describes extraction of natural weight shift and foot rolling for gait evaluation by using a sensitive shoe, in the insole of which hetero-core optical load sensors are embedded for detecting plantar pressure. Plantar pressure of three subjects who wear the sensitive shoe and walk on the treadmill was monitored. As a result, weight shift and foot rolling for three subjects were extracted using the proposed sensitive shoe in terms of centroid movement and positions. Additionally, these extracted data are compared to that of electric load sensor to ensure consistency. For these results, it was successfully demonstrated that hetero-core optical fiber load sensor performed in unconstraint gait monitoring as well as electric load sensor.

Citation Download Citation

Yudai Otsuka, Yuya Koyama, Michiko Nishiyama, and Kazuhiro Watanabe "Extraction of natural weight shift and foot rolling in gait based on hetero-core optical fiber load sensor", Proc. SPIE 9754, Photonic Instrumentation Engineering III, 975405 (15 March 2016); https://doi.org/10.1117/12.2212492

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available