System for training a pitcher to pitch a baseball

摘要

A system for measuring and analyzing body mechanics of a subject includes receivers, transmitters, a display and a processor. The processor which includes a controller which controls the timing of signals from the transmitters so that a signal from each of the transmitters contains an encoded signature which unambiguously identifies the signal as coming from that particular the transmitter. The processor also include a detector which detects signal transmissions as the signal transmissions arrive at the receivers, a signature determinator which recognizes the signature and determines from which particular transmitter the detected signal originated, a local timer which measures a temporal delay between times of emission of the signals from the transmitters and their detection at the receivers. A calculator computes geometric distances between each of the transmitters and each of the receivers and which also calculates a three-dimensional position of each of the receivers by using the geometric distances and known position of the transmitters.