风的大小对麦克风阵列雷声定位影响的模拟研究  

Simulation Study on the Influence of Wind on the Thunder Source Location by Microphone Planar Array

作　　者：叶倩 王彩霞[1] 田杨萌[1] 杨思琪 YE Qian;WANG Caixia;TIAN Yangmeng;YANG Siqi(College of Applied Sciences,Beijing Information Science and Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学理学院,北京100192

出　　处：《电声技术》2021年第2期17-22,共6页Audio Engineering

摘　　要：针对雷声定位经常因环境因素影响导致定位出现偏差的问题,对环境因素中影响最大且最广泛的因素-风,进行实验验证和模拟仿真分析。首先提出风对麦克风平面阵列定位结果的影响模型和声源定向误差理论,通过实验验证了风对声源定位结果产生显著影响。基于波束形成算法,使用Matlab软件仿真分析风速大小对雷电声波传播速度和声源定位结果的影响,并总结声波传播速度、定位出的声源方位角和仰角、定位出的声源来波方向等物理量的误差分别随风的大小改变的变化规律。实验及仿真结果表明,风对雷声定位结果产生了不可忽略的影响。随着风级的增大,声波传播速度误差增大,定位方向误差增大。Aiming at the problem of positioning deviations due to environmental factors during thunder source positioning,this paper conducts experimental verification and simulation analysis for the most influential and most extensive factor in environmental factorswind.This paper first puts forward a model of the influence of wind on the positioning result of the microphone plane array and the theory of sound source orientation error.It is further verified through experiments that wind has a significant influence on the result of sound source positioning.Then,based on the beamforming algorithm,Matlab software is used to simulate and analyze the influence of wind speed on the propagation speed of lightning sound waves and the result of sound source location.Summarizes the law of the change of the sound wave propagation velocity,the azimuth and elevation angle of the localized sound source,the direction of the localized sound source and other physical quantities with the change of the wind.Experimental and simulation results show that wind has a nonnegligible effect on the results of thunder sound positioning.With the increase of wind level,the error of sound wave propagation speed increases,and the error of positioning direction increases.

关 键 词：雷声声源定位 麦克风阵列 定位误差 风影响 来波方向 

分 类 号：TN911.7[电子电信—通信与信息系统]