基于单矢量水听器弱信号值班检测系统-声学技术.PDF

24 1 Vo.l 24, No. 1 2005 3 TechnicalAcoustics Mar., 2005 王德俊, 惠俊英, 蔡平, 樊世斌, 苏龙滨 (, 150001) : , 90, 901Bit , , 2k , 1. 8kH z, 5 A, : ; ; ; : TB56; TB565; 0427 : A : 1000-3630(2005) 01-0001-03 Feeble signal detection on watch based on single vector hydrophone WANG De-jun, HUI Jun-ying, CAIPing, FAN Shi-bin, SU Long-bin (H arb in E ng ineering Un iv er sity, H arbin 150001, Ch ina) Abstract: A low power feeble signal detection syste on watch based on single vector hydrophone has been designeo inwhich average intensity isdetected. Proble s characteristicof vector signals such as90 phase difference, zeroes in directivity, ultiplication and integration, and double polarity were solved w ith appropriate functional circuits. High gain, low power and good stability have been taken into ac- count, and icro-power analong circuits used. Syste si ulation shows that the effective range of the syste exceeds 2k . Teston an experi entalunit indicates that the bandw idth ofoperation is fro 30Hz to 1. 8kHz. The circuitworks stablyw ith a totalcurrent of only 5 A. K ey words: feeble signaldetecting; syste on watch; vector hydrophone; icro-power ultiplication , [ 3] 1 , , , , , ,, 1k , , [ 1] , 2 1k [ 2] ,