GUIDANCE SYSTEM IN UNDERWATER CRUISING BODY

摘要

PURPOSE:To enable accurate recognition and guidance by not controlling a reflected signal from a target, controlling only a reverberation signal and stressing the reflected signal in comparison with the reverberation signal. CONSTITUTION:Between a pair of transmitter-receivers 5 and 6 serving also as a receiving circuit and a direction discriminating circuit 11 are provided a transmission-reception selecting switch 8, amplifiers 9 and 10 and specific filters 15 and 16 sequentially from the input side. The specific filters 15 and 16 are constituted as digital filters respectively and the attenuation property thereof is set to be reverse to the property of reverberation frequency. In addition, a transmission frequency controlling circuit 23 is provided to match the central frequency of the digital filters 15 and 16 with the average frequency of reverberation.