Development of a Bendable Outsole Biaxial Ground Reaction Force Measurement System

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<jats:p>Wearable ground reaction force (GRF) measurement systems make it possible to measure the GRF in any environment, unlike a commercial force plate. When performing kinetic analysis with the GRF, measurement of multiaxial GRF is important for evaluating forward and lateral motion during natural gait. In this paper, we propose a bendable GRF measurement system that can measure biaxial (vertical and anterior-posterior) GRF without interrupting the natural gait. Eight custom small biaxial force sensors based on an optical sensing mechanism were installed in the proposed system. The interference between two axes on the custom sensor was minimized by the independent application of a cantilever structure for the two axes, and the hysteresis and repeatability of the custom sensor were investigated. After developing the system by the installation of force sensors, we found that the degree of flexibility of the developed system was comparable to that of regular shoes by investigating the forefoot bending stiffness. Finally, we compared vertical GRF (vGRF) and anterior-posterior GRF (apGRF) measured from the developed system and force plate at the same time when the six subjects walked, ran, and jumped on the force plate to evaluate the performance of the GRF measurement system.</jats:p>
Publisher
MDPI
Issue Date
2019-06
Language
English
Article Type
Article
Citation

SENSORS, v.19, no.11, pp.2641

ISSN
1424-8220
DOI
10.3390/s19112641
URI
http://hdl.handle.net/10203/263199
Appears in Collection
ME-Journal Papers(저널논문)
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