| 摘要 |
PROBLEM TO BE SOLVED: To detect an impact force corresponding to an actual movement of a human body in a compact constitution easily without requiring an article target, by using an acceleration sensor attached to the human body for detecting an acceleration of the movement, etc. SOLUTION: A watch main body 11 is of the same size as a general wristwatch which can be wound around a wrist or the like by a wrist band, having an acceleration sensor 12 set thereinside. For instance, if the watch main body 11 is fitted to a right arm as a person's dominant arm when the person makes a punching motion, a voltage generated from the acceleration sensor 12 is detected as a '+' voltage when the person projects the arm. On the other hand, at a turning point when the arm is fully extended, the voltage is detected as a '-' voltage. A maximum speed of the punch and an acceleration peak value B detected by the acceleration sensor 12 are nearly proportional, and therefore the maximum speed of the punch can be detected on the basis of the acceleration peak value B. An impact force of the punch is calculated from the speed of the punch and a weight of the person. |
