灵敏度可调式压电薄膜水听器  

A piezoelectric film hydrophone with adjustable sensitivity

作　　者：王丽坤[1] 李光[1] 王光灿[1] 

机构地区：[1]北京信息工程学院,北京100101

出　　处：《应用声学》2003年第2期35-38,共4页Journal of Applied Acoustics

摘　　要：本文介绍一种灵敏度可调式压电薄膜水听器。采用PVDF薄膜作为换能材料,聚碳酸脂作为背衬,薄膜粘贴在背衬的内壁,软性的背衬在声压的作用下形变,从而带动薄膜形变,产生电信号输出。水听器内装有前置放大器,调节放大器的负载电阻可调节水听器的灵敏度。灵敏度变化范围为-190dB——175dB,频率响应100Hz-16kHz。This paper presents a piezoelectric film hydrophone with adjustable sensitivity. It uses PVDF film as a sensing material, which is pasted inside the wall of a cylinder made of a flexible organic material. When sound pressure is applied to the flexible cylinder, the PVDF transfers the sound pressure to electric charge. There is a preamplifier in the hydrophone. The sensitivity of the hydrophone can be controlled by adjusting a loadresistance in the preamplifier, the range of adjustable sensitivity is -190 dB——175 dB(re 1 V/μPa), and the frequency response is 100 Hz - 16kHz.

关 键 词：PVDF薄膜 灵敏度 可调式压电薄膜水听器 

分 类 号：TB565.1[交通运输工程—水声工程]