基于对称麦克风基阵的枪声定位算法研究

Research on Gunshot Location Algorithm Based on Symmetric Microphone Array

为改善枪声定位系统的性能,本文提出了双麦克风基阵对称布局的方法.以7个麦克风构成上下对称的两个正四棱锥基阵,分别对距离、俯仰角和方位角公式进行了推导,搭建物理模型对定距、定向误差进行仿真分析,并对双基阵俯仰角的误差进行分析和数据融合.研究表明所提出的基阵模型对枪声定位系统的定向性能改善较为明显,可应用于固定监测点或低速车载系统,能够实现对近距离目标的定位和远距离目标的精确定向.

In order to improve the performance of the gunshot location system,this paper puts forward the method of dual microphone array symmetrical layout.Seven microphones is used to constitute the symmetry of two rectangular pyramid array,and formula is derived respectively to the distance,the pitch angle and the azimuth angle.Physical model is built to simulate and analyze fixed distance and orientation errors,and analyze the double-base array pitch error and data fusion.Research shows that this array model performance of direction is improved obviously,which can be applied to the fixed or low speed vehicle monitoring system.It can realize probe the gunshot location in short distance and the gunshot direction in long distance.