圆柱形超高静水压水听器设计与测试

(本文介绍了一种应用于20Hz~20kHz频段、最大工作深度5000米的超高静水压水听器,水听器敏感元件采用厚壁压电陶瓷圆管,高强度复合泡沫去耦,通过对敏感元件及水听器结构进行合理设计,保证水听器具有高的耐压强度。设计了一种圆柱形高静压耦合腔,根据耦合腔声学和力学条件,确定了腔体尺寸及厚度,在国内首次实现了最高50MPa压力下的水听器低频灵敏度测试。测试结果表明,水听器常压下接收灵敏度响应平坦,在常压到50MPa压力范围内,水听器低频接收灵敏度最大变化小于2dB,表明该型水听器具有良好的压力稳定性,可在深海资源勘测、深海通讯等方面获得广泛应用。)

Design and test of cylindrical high hydrostatic pressure hydrophone

(This paper introduces a high hydrostatic pressure hydrophone which is used in the 20Hz~20kHz band and the maximum depth is 5000 meters. The sensor uses thick wall piezoelectric circular tube and high strength composite foam to decouple. Through reasonable design of the structure, the hydrophone has high pressure resistance. According to the acoustic and mechanical conditions of the cylindrical high coupling cavity, the size and the thickness of the cavity are determined. It is the first time to realize measurement of low-frequency sensitivity of hydrophone with 50Mpa pressure. The test results show that the sensitivity of the receiver at atmospheric pressure is flat. In the 0.1MP~50Mpa pressure range, the maximum change of the sensitivity of hydrophone at low frequency is less than 2dB, which indicates that the hydrophone has good pressure stability. It can be widely applied in deep resource survey and deep sea communication.)