TARGET INDICATING SYSTEM AND METHOD

摘要

Transducers are spaced evenly in opposed pairs around a metal target. The transducers receive acoustic waves created by bullets striking the target and produce corresponding electrical signals. The approximate "score" of the impact (the distance from the center of the target) is determined by starting a counter with the signal from the first transducer to receive an acoustic wave, and then stopping the counter with the signal from the last transducer to receive the acoustic wave. The approximate azimuth of the impact is determined by using the transducer signals and logic circuitry to light one of twelve lamps to indicate in which of 12 sectors of a circle the impact is located.