半经验关系与匹配场联合处理的爆炸声源快速定位

爆炸声源位置的快速准确获取对声源级测量和声传播计算具有重要意义。为了解决利用单一水听器进行爆炸声源定位时难以获得较好的定位效率和精度的问题,提出了一种基于半经验关系与匹配场联合处理的爆炸声源快速定位方法。首先通过爆炸声源满足的半经验关系,对爆炸位置进行预估,缩小匹配参数的搜索范围;同时,在基于多途时延差匹配定位理论的基础上,利用爆炸声源的半经验关系建立联合匹配定位方法,引入气泡脉动周期和冲击波峰值增加匹配物理信息,实现爆炸声源深度和距离精确反演。仿真分析与2013年南海水下爆炸声试验数据分析结果表明,一次气泡脉动周期与多途时延差的联合匹配可提高对爆炸声源深度的估计精度;冲击波峰值与多途时延差的联合匹配可提高对距离的估计精度。额外匹配量的引入减少了估计精度对接收阵元个数的依赖,能够实现用单阵元快速准确地进行爆炸源位置的估计。 

Underwater explosive source localization based on semi empirical relationships and matched field processing

Efficiently estimating the exact location of explosives has considerable significance in sound exposure level measurement and acoustic propagation.To solve the problem of low positioning efficiency and accuracy using the signal received by a single hydrophone,a quick localization method based on semi-empirical theory and the Matched Field Processing(MFP) method is proposed.Semi-empirical relationships can be used to reduce the searching area to increase the efficiency of the localization.The accuracy of the localization estimation can be increased by adding additional matching parameters,such as the period of the bubble pulse and the peak pressure of the shock wave based on semiempirical relationships.Both the simulation results and the data from underwater explosion measurements verify that the joint of multiple-path time delays and the bubble pulse period can estimate the explosive depth accurately.Further,the combination of multiple-path time delays and the peak pressure can estimate the range accurately.Compared with the traditional MFP based on multiple-path time delays,the proposed joint method can implement quick and accurate localization with a single hydrophone.