プリズムの二斜面とサンプリングモアレ法を利用した三軸フォースプレート

抄録

This paper reports on a triaxial force plate using two inclined facets of a prism and sampling moire method. The ground reaction force is one of the most important factors for evaluating biomechanics and force plates are commonly used for its measurement. Conventional force plates utilize strain gauges, but there are challenges in developing small force plates. While force plates with non-contact type sensors have been developed, these are not suitable for multiaxial measurement. On the other hand, the sampling moire (SM) method has garnered attention as a high-resolution in-plane measurement technique. The proposed force plate comprises a plate, spring structure, 2-D grating, prism and camera. Three directional displacements are measured from images that have two inclined grating images before and after displacement by the SM method. In this study, we designed and fabricated a 25 mm × 25 mm force plate element. The fabricated force plate independently enabled three-axis measurements.