【摘要】 声测被动定向是声学监视技术的重要研究内容。为了实现对低空运动目标的声学监视,提出了一种基于声矢量传感器原理的被动定向方法,推导出了基于互谱法声强测量技术的定向算法,并对定向算法进行了分析和数值仿真。仿真表明:当传感器尺寸为0.28m、信号信噪比为5dB时,定向精度在2.5°以内。仿真结果说明,该定向算法是正确可行的,有较大的实用价值。该研究成果可直接用于空中运动目标,如飞机、导弹和无人机等目标的声测被动定向。更多还原

【Abstract】 Passive acoustic bearing estimation is an important aspect in the acoustic surveillance.In order to realize the surveillance to the low altitude targets,the method on passive bearing estimation with acoustic vector sensors is presented in the paper.Based on the technique of measuring the cross spectrum density to calculate acoustic intensity,the algorithm of bearing estimation is derived.Simulation results,giving in Figs.3 through 5,show that the algorithm precision can achieve 2.5°when the size of acoustic vector sensor is 0.28m and SNR=5dB.The simulation results also show that the method is feasible,and could be used in practice.The results of the research could be directly used in estimating the bearing of the low altitude targets such as helicopters,missiles,and so on.更多还原