周期运动声源的双阵列定位

针对常用的运动声源定位方法存在计算量较大或测试难度大的问题,提出一种基于阵列信号短时处理的运动声源定位方法。分析单、双五元十字阵列的定位性能,并基于单阵列的高精度定向能力,借鉴波束形成中帧处理思想,使用双阵列方位交叉的方法实现声源运动定位。使用自行火炮的发动机周期噪声作为模拟声源,进行外场定位实验,对参与短时相关数据的截取原则和传播路径补偿进行研究。实验结果表明,该方法能够有效实现周期声源的运动定位,最大相对误差保持在5%的水平。

Locating method of moving periodic sound source with double-array

Aiming at the intensive calculation and difficulty in test with common methods of moving sound source locating, a locating method based on array signal processing was proposed. Locating ability of single and double five-element cross array were analyzed. Based on the high performance of direction estimating with single array, location of moving sound source was achieved by azimuth of double arrays crossing according to beamforming. Locating experiment was carried on while using engine noise of self-propelled vehicle as simulated source. Then the length selection of short correlation and compensation of moving path were studied. Experiment shows that the method is effective to moving sound source locating with high precision, maximum relative error stays below level of 5%.