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Proceedings Paper

A platform-based foot pressure/shear sensor
Author(s): Chun-Te Chang; Chao Shih Liu; William Soetanto; Wei-Chih Wang
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Paper Abstract

The proposed research is aimed at developing, fabricating and implementing a flexible fiber optic bend loss sensor for the measurement of plantar pressure and shear stress for diabetic patients. The successful development of the sensor will greatly impact the study of diabetic foot ulcers by allowing clinicians to measure a parameter (namely, shear stress) that has been implicated in ulceration, but heretofore, has not been routinely quantified on high risk patients. A full-scale foot pressure/shear sensor involves a tactile sensor array using intersecting optical waveguides is presented. The basic configuration of the optical sensor systems incorporates a mesh that is comprised of two sets of parallel optical waveguide planes; the planes are configured so the parallel rows of waveguides of the top and bottom planes are perpendicular to each other. The planes are sandwiched together creating one sensing sheet. Two-dimensional information is determined by measuring the loss of light from each of the waveguide to map the overall pressure distribution. The shifting of the layers relative to each other allows determination of the shear stress in the plane of the sensor. This paper presents latest development and improvement in the sensors design. Fabrication and results from the latest tests will be described.

Paper Details

Date Published: 20 April 2012
PDF: 9 pages
Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83481U (20 April 2012); doi: 10.1117/12.915396
Show Author Affiliations
Chun-Te Chang, Southern Taiwan Univ. (Taiwan)
Chao Shih Liu, National Defense Univ. (Taiwan)
William Soetanto, Univ. of Washington (United States)
Wei-Chih Wang, Univ. of Washington (United States)
National Cheng Kung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8348:
Health Monitoring of Structural and Biological Systems 2012
Tribikram Kundu, Editor(s)

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