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도플러 속도계(DVL)를 위한 광대역 수중 음향 트랜스듀서
윤철호(Cheol-Ho Yun),이영필(Yeoung-Pil Lee),고낙용(Nak Yong Ko),문용선(Yong-seon Moon) 제어로봇시스템학회 2013 제어·로봇·시스템학회 논문지 Vol.19 No.9
A broad-band underwater acoustic transducer that uses thickness vibration mode, derived from a disk type piezoelectric ceramic, has been proposed and designed for DVL (Doppler Velocity Log). Three different types of acoustic transducer were evaluated with respect to the transmitting voltage response, receiving voltage sensitivity and bandwidth of the transducer. The effect of the acoustic impedance matching layer and backing layer is discussed. The results demonstrated that three matching layer with lossy backing layer is the best configuration for underwater transducer. The trial underwater acoustic transducer with three matching layer has a frequency bandwidth of 55%, maximum transmitting voltage response of 200 dB and a maximum receiving voltage sensitivity of -187.3 dB.