一种基于阵列不变量的浅海声源深度分类方法  

Source depth discrimination based on array invariant in shallow water

作　　者：于喜凤 李辉[1,2,3] 徐哲臻[1,2] 杨坤德 YU Xifeng;LI Hui;XU Zhezhen;YANG Kunde(School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,Shaanxi,China;Key Laboratory of Ocean Acoustics and Sensing(Northwestern Polytechnical University),Ministry of Industry and Information Technology,Xi’an 710072,Shaanxi,China;National Satellite Ocean Application Service,Beijing 100081,China)

机构地区：[1]西北工业大学航海学院,陕西西安710072 [2]西北工业大学海洋声学信息感知工业和信息化部重点实验室,陕西西安710072 [3]国家卫星海洋应用中心,北京100081

出　　处：《声学技术》2021年第5期601-606,共6页Technical Acoustics

基　　金：国家自然科学基金(61901383);声场声信息国家重点实验室开放基金(SKLA202005);中国博士后科学基金(2020M670246)资助项目。

摘　　要：浅海负跃层环境下波导不变量可以用于声源深度分类,但是当声源相对于接收阵无径向距离变化时,波导不变量值难以估计。针对距离已知且相对于接收阵无径向距离变化的声源,提出一种基于阵列不变量的声源深度分类方法,可适用于浅海负跃层环境。所提方法利用阵列不变量估计波导不变量,进而实现声源深度分类。计算机仿真结果表明,当垂直阵位于负跃层以下且声源距离已知时,利用阵列不变量估计出的波导不变量随声源深度的变化明显,可用于目标深度分类。Waveguide invariant can be used for source depth discrimination in shallow water with a thermocline. However, estimating the value of waveguide invariant is a challenging work if a source is observed by an array without efficient radial aperture. To address the depth discrimination problem for the source with a known distance but no radial distance change relative to the receiving array, an array invariant based method suitable for the shallow water with a thermocline is proposed. In this method, a vertical linear array is used to extract the waveguide invariant based on the array invariant and then the source depth discrimination is realized. The simulation results show that when the vertical linear array is deployed below the thermocline and the source distance is known, the waveguide invariant extracted from the array invariant varies significantly with the source depth and it can be used in source depth discrimination successfully.

关 键 词：阵列不变量 声源深度分类 波导不变量 

分 类 号：TB56[交通运输工程—水声工程]