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Vol. 170, Issue 5, May 2014, pp. 30-34

 

Bullet

 

An Underwater Acoustic Vector Sensor with High Sensitivity and Broad Band
 

1, 2 Hu Zhang, 1, 2 Hong-Juan Chen, 1, 2 Wen-Zhi Wang

1 College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
2 Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, China
1 Tel.: +8613766826805

1 E-mail: zhanghu@hrbeu.edu.cn

 

Received: 13 March 2014 /Accepted: 30 April 2014 /Published: 31 May 2014

Digital Sensors and Sensor Sysstems

 

Abstract: Recently, acoustic vector sensor that use accelerators as sensing elements are widely used in underwater acoustic engineering, but the sensitivity of which at low frequency band is usually lower than -220 dB. In this paper, using a piezoelectric trilaminar optimized low frequency sensing element, we designed a high sensitivity internal placed ICP piezoelectric accelerometer as sensing element. Through structure optimization, we made a high sensitivity, broadband, small scale vector sensor. The working band is 10-2000 Hz, sound pressure sensitivity is -185 dB (at 100 Hz), outer diameter is 42 mm, length is 80 mm.

 

Keywords: Broadband, High sensitivity, Small-scale, Acoustic vector sensor.

 

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