| 摘要 |
PROBLEM TO BE SOLVED: To analyze a swing without restricting joint motion by measuring a dynamic vector by setting individual coordinate systems on both sides in the vicinity of a joint at swinging time, and analyzing a swing by determining a joint angle from a relative angle between both coordinate systems. SOLUTION: An acceleration sensor 1 is installed on a ring-shaped supporter 5, and an acceleration sensor 2 is installed on a glove 6, respectively to be respectively installed on a front arm in the vicinity of a wrist and the back of a hand to measure an angle of the wrist at swinging time. That is, X, Y, Z axes of the acceleration sensor 1 are used as a reference coordiante system, and X', Y', Z' axes of the acceleration sensor 2 are used as a motional coordiante system to express motion of the wrist as the positional relationship between both coordiante systems. A palm back bending angleϕand an ulnoradial bending angleθare calaculated. A swing is photographed by a video camera to determine a joint angle. A measuring result and the joint angle are compared and examined to thereby analyze the swing without restricting joint motion.
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