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Proceedings Paper

Design and performance of a fiber Bragg grating displacement sensor for movement measurement of tendon and ligament
Author(s): Liang Ren; Gangbing Song; Michael Conditt; Philip C. Noble; Hongnan Li
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Paper Abstract

Biomechanical studies often involve measurements of the strains developed in tendons or ligaments in posture or locomotion. Fiber optic sensors present an attractive option for measurement of strains in tendons and ligaments due to their low cost, ease of implementation, and increased accuracy compared to other implantable transducers. A new displacement sensor based on fiber Bragg grating and shape memory alloy technology is proposed for the monitoring of tendon and ligament strains in different postures and in locomotion. After sensor calibration in the laboratory, a comparison test between the fiber sensors and traditional camera displacement sensors was carried out to evaluate the performance of the fiber sensor during application of tension to the Achilles tendon. Additional experiments were performed in cadaver knees to assess the suitability of these fiber sensors for measuring ligament deformation in a variety of simulated postures. The results demonstrate that the proposed fiber Bragg grating sensor is a high-accuracy, easily implantable, and minimally invasive method of measuring tendon and ligament displacement.

Paper Details

Date Published: 11 April 2007
PDF: 6 pages
Proc. SPIE 6532, Health Monitoring of Structural and Biological Systems 2007, 65321R (11 April 2007); doi: 10.1117/12.717563
Show Author Affiliations
Liang Ren, Dalian Univ. of Technology (China)
Univ. of Houston (United States)
Gangbing Song, Univ. of Houston (United States)
Michael Conditt, Advanced Technology in Orthopedics LP (United States)
Philip C. Noble, The Institute of Orthopedic Research & Education (United States)
Hongnan Li, Dalian Univ. of Technology (China)

Published in SPIE Proceedings Vol. 6532:
Health Monitoring of Structural and Biological Systems 2007
Tribikram Kundu, Editor(s)

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