一种矢量水听器指向性测试算法  

Directivity Test Algorithm of Vector-hydrophone

作　　者：张恒[1] 蒋世军 邓秀华[1] 陈韶华[1] 

机构地区：[1]中国船舶重工集团公司第七一○研究所,湖北宜昌443003 [2]海军装备部装备采购中心,北京100071

出　　处：《水雷战与舰船防护》2014年第2期21-25,共5页Mine warfare & Ship Self-Defence

摘　　要：在水库进行低频矢量水听器测试,由于试验趸船转台噪声以及水草等反射的影响,接收到的信号叠加了干扰。采用常规的通过有效值绘制指向性曲线时,不能准确反映矢量水听器实际的指向性。提出了一种采用基于频谱的归一化指向性图函数定义,采用频谱分析和能量检测的方法,通过数字滤波和谱线提取,有效降低了干扰,比较真实地测量了矢量水听器的指向性。Vector-hydrophone is tested in a reservoir.Because of the noise of pontoon rotary mechanism and the reflection of float grass,the interference attaches to the received signal.The directivity curve drawn by usual method can't express the actual directivity of vector-hydrophone exactly.A normalization directivity definition based on frequency spectrum is brought forward.The methods of spectrum analysis and energy detection are adopted,which realize the filtering and the spectrum line selection.In the result,the interference is reduced effectively,and the directivity of vector-hydrophone is measured correctly.

关 键 词：矢量水听器 指向性 频谱分析 

分 类 号：TB565.1[交通运输工程—水声工程]