陸上競技用スタート動作の検出方式

抄録

The false start detection system measures the reaction time associated with the start action of a sprinter and judges the false start automatically. This system must be used for the 100m, 200m, 400m dashes, the 110m, 110m, 400m hurdles and the 4×100m, 4×400m relays of the track and field competition in the Olympic and the world championship competitions. The conventional false start detection system detects the kicking force of a sprinter above the threshold level (about 200 to 400N). The kicking force and the speed, however, depend on the individual sprinter, and becomes the largest expected errors in this system. It is also impossible to measure the kicking force below the fixed threshold level or it's already applied before the starting time.
This paper introduces a new detection system for a sprinter, which subtracts the smoothed moving-averaged and delayed signals from the as-detected signal. This numerical procedure, executed on time by computer, effectively gives the change of the kicking force as a function of the time of the individual sprinter, independent of his force and the speed, resulting in the exact detection of the starting action. This paper explains this new but now practically used false start detection system.