基于短基线传感器网络的声源被动测向方法

摘要

As the traditional direction-finding method of passive sound source has the problem of low precision and fixed structure,a direction-finding method based on short baseline sensor network was proposed.According to the time difference of arrival (TDoA)measurements of a sound signal among any sensor nodes with random locations,the least square technique was adopted to compute the bearing of source souce.Practical experimental data of the artillery fire and burst point in the true environment showed that the short baseline sensor network had a better direction-finding ability compared with the traditional array of fixed shapes.%针对声源被动测向的传统方法存在精度低和结构单一的问题，提出了基于短基线传感器网络的测向方法。该方法根据声信号到达不规则排列的传感器节点之间时间差，采用最小二乘原理计算声源方位。通过火炮发射和炮弹炸点的实测声源试验数据表明，短基线传感器网络比固定阵型的传统阵列具有更好的定向精度。