Validity of a FBG-based smart sock system for measuring toe grip function in human foot

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Citation
Leow, Y., Heng, M. L., Liu, Y., Fong, D. T., Chan, C. C., & Kong, P. W. (2020). Validity of a FBG-based smart sock system for measuring toe grip function in human foot. Journal of Mechanics in Medicine and Biology, 20(3), Article 2050015. https://doi.org/10.1142/S0219519420500153
Author
Leow, Yixuan
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Heng, Marabelle Li-Wen
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Liu, Yimin
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Fong, Daniel Tik-Pui
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Chan, Chi Chiu
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Kong, Pui Wah 
Abstract
This study developed a smart sock system using optical fiber technology to measure the toe grip function of individual toes. The system comprised Fiber Bragg grating (FBG) sensors incorporated into a sock garment for measuring maximum toe flexion displacements. Calibration equation of each FBG sensor was determined from 3D motion capture system on 10 female subjects. The validity of the smart sock system was checked by comparing maximum toe flexion displacement against the gold standard of 3D motion capture. The root mean squared error was 0.95 (0.57) cm across 10 toes. The magnitude of toe displacement and error were similar between the left and right foot. In conclusion, the FBG-based smart sock system can successfully measure maximum toe flexion displacements of individual toes simultaneously. This system can be developed to support the evaluation of toe grip function in clinical and field settings.
Keywords
Date Issued
2020
Publisher
World Scientific
Journal
Journal of Mechanics in Medicine and Biology
DOI
10.1142/S0219519420500153
Dataset
https://doi.org/10.25340/R4/ETVJXU
Description
This is the final draft, after peer-review, of a manuscript published in Journal of Mechanics in Medicine and Biology. The published version is available online at https://doi.org/10.1142/S0219519420500153