高频水声换能器匹配层技术研究  

Research on matching layer technology of underwater high frequency acoustic transducer

作　　者：卞加聪 赵慧[1] 沈明杰 BIAN Jiacong;ZHAO Hui;SHEN Mingjie(Shanghai Marine Electronic Equipment Research Institute,Shanghai 201108,China)

机构地区：[1]上海船舶电子设备研究所,上海201108

出　　处：《声学技术》2021年第1期143-146,共4页Technical Acoustics

基　　金：国防科技重点实验室基金(6142108181011)资助项目。

摘　　要：在复杂的海洋环境中,为提高对目标的探测效果以获得更多的信息,高频声呐常需要更宽的工作频带。首先,通过声透射原理对不同匹配层材料进行选取与设计;其次,通过有限元仿真对不同匹配层换能器的透射系数、电导谱和发送电压响应展开了分析计算;最后,在理论分析、解析计算和有限元仿真计算的基础上成功研制了单层、双层和三层匹配层高频宽带水声换能器,其工作频带分别为79~150 kHz,74~163 kHz和66~176 kHz,带内发送电压响应起伏为−6 dB。实验结果表明:匹配层层数越多,换能器的带宽越宽,该工作为实现宽频带换能器在实际工作中的应用提供了方向。In a complex marine environment,high-frequency sonar often requires broadband operation to obtain more target information and improve the detection effect of the target.Firstly,matching layer materials are selected and designed according to the acoustic transmission principle;then the transmission coefficient,conductivity spectrum and transmitting voltage response of the transducers with matching layers are analyzed and calculated by using finite element simulation;finally,based on theoretical analysis,analytical calculations and finite element simulations,the high-frequency broadband acoustic transducers with single,double and triple matching layers are successfully developed and the bandwidths of these transducers are 79~150 kHz,74~163 kHz and 66~176 kHz respectively,the fluctuation of the transmitting voltage response is −6 dB.The experimental results show that the more the matching layers,the wider the bandwidth of transducer is.This work points out a direction for the application of broadband transducers in practical work.

关 键 词：匹配层 宽带 高频换能器 

分 类 号：TB565.1[交通运输工程—水声工程]