An Analysis of the Data Collected from Three-Dimensional Force Platform and High Speed Camera to Squat Jump

摘要

Coordination of body segment and storage and reutilization of elastic potential energy have been the critical factors when analyzing and diagnosing the effectiveness of a movement. An approach is designed to quantitatively analyze human movements' coordination and employment of mechanical energy by using three-dimensional force platform and high speed camera. In this research, KISTLER force platform system and NAC high speed camera are used to measure and film athletes who do squat jump movements. These are done on the force platform under the condition that an athlete has conducted her warming-up and adaptive exercises. Then the force between the feet and the force platform when an athlete is doing squat jump at the starting phase is obtained. By labeling reflective markers to the joints, high speed camera is used to get the kinematics of joint angles. A multi-rigid dynamic approach (Hanavan model when referring to human model) is employed to analyze the kinematics from the high speed camera, while data from three-dimensional force platform are analyzed in theory of particles kinetics. The results show that quantitative analysis to the sequential order of segment movements of human body and to the storage and reutilization of elastic potential energy could be conducted with a multi-rigid dynamical approach to the high-speed filming of movements done on the three-dimensional force platform.