空气中声源的水下匹配场定位  

Matched field localization of the air-borne sound source in underwater

作　　者：苏林[1,2,3] 孙炳文[1,2] 郭圣明[1,2] 马力[1,2] 

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院水声环境特性重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《声学学报》2015年第6期799-806,共8页Acta Acustica

基　　金：中国科学院国防科技创新基金(CXJJ-14-S100)资助

摘　　要：通过水下布放的垂直线列阵采集空中声源在水下激发的测量声场,采用声场波数积分模型(OASES模型)对空中声源激发的水下声场建模,计算出拷贝声场,将二者进行匹配处理从而对空中声源目标定位。首先通过数值仿真验证了匹配场处理技术对空中声源的测距能力,并通过引入宽带匹配场处理器平滑掉距离上的周期性旁瓣。最后分析南海某海域的空气声试验数据,采用常规匹配场方法对700 m以内的32组空中声源目标进行定位,测距结果与GPS计算的收发间实际距离相比,大多数情况下是一致的,在较远距离由于信噪比降低,测量结果容易出现偏差。The underwater acoustic field excited by airborne source is sampled by an underwater vertical line array, meanwhile the copy sound filed is calculated by the wavenumber integral model （OASES model）. Then the matched filed processor （MFP） is introduced to indicate the airborne source location. Numerical simulation is carried out to verify the ranging ability of MFP to the air borne sound source, wide band processing is introduced to suppress the periodic side lobe. An experiment about air borne sound is conducted in the South China Sea. The conventional MFP is utilized to locate 32 sets of airborne sound source within 700 m. The range measurement corresponds to the GPS result in the majority situation, bias is more susceptible to the further source due to a lower signal-noise ratio.

关 键 词：匹配场定位 水下声场 空气声 声源 测距能力 匹配场处理 远距离 积分模型 

分 类 号：TN911.7[电子电信—通信与信息系统]