光纤矢量水听器指向性测试及锐化技术  

Directivity test technology and directivity sharpening of fiber-optical vector hydrophone

作　　者：张振宇[1] 周江涛[2] 倪明[1] 胡永明[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院 [2]91388部队95分队

出　　处：《应用声学》2009年第5期350-355,共6页Journal of Applied Acoustics

基　　金：国家863计划项目(2006AA09Z121);新世纪优秀人才支持计划资助

摘　　要：光纤矢量水听器是一种新型的水听器,它兼具矢量水听器和光纤水听器的优点。矢量水听器具有自然的偶极子指向性,但是其-3dB带宽为90°,目标分辨能力有限,因此需要对其进行指向性锐化。本文对光纤矢量水听器的自然指向性进行了湖试测定,研究了基于最小方差无失真响应(MVDR)方法的指向性锐化技术,在湖试数据处理中,将其-3dB主波束宽度抑制在20°以内,取得了良好的效果。Fiber-optical vector hydrophone is a new techology of hydrophone. It has the excellences of both the vector hydrophone and the fiber-optical hydrophone. The vector hydrophone has a natural dipole directivity, of which the -3dB beamwidth is 90 degrees, and so it need the directivity sharpening technology to distinguish multi-targets using a single vector hydrophone. This study uses the method based on MVDR for directivity sharpening. The result of one lake trial shows that the method is effective, which the width of the main beam can be suppressed within 20°.

关 键 词：光纤矢量水听器 指向性锐化 最小方差无失真响应 

分 类 号：TB565.1[交通运输工程—水声工程] TN643[理学—物理]