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Broad-Band Underwater Acoustic Transducer for Doppler Velocity Log

도플러 속도계(DVL)를 위한 광대역 수중 음향 트랜스듀서

  • Yun, Cheol-Ho (Robot Research Laboratory, Redone Technologies) ;
  • Lee, Yeoung-Pil (Robot Research Laboratory, Redone Technologies) ;
  • Ko, Nak Yong (Department of Electronic Engineering, Chosun University) ;
  • Moon, Yong-Seon (Department of Electronic Engineering, Sunchon National University)
  • 윤철호 (레드원테크놀러지(주)) ;
  • 이영필 (레드원테크놀러지(주)) ;
  • 고낙용 (조선대학교 제어계측로봇공학과) ;
  • 문용선 (순천대학교 전자공학과)
  • Received : 2013.05.15
  • Accepted : 2013.06.30
  • Published : 2013.09.01

Abstract

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.

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