摘要
为实现强噪声的高指向性传播，基于声频定向系统研究点声源面阵列的指向性函数，利用MATLAB对点声源面阵列指向性进行仿真，研究不同阵元间距、阵元数目对超声波指向性影响。由仿真得出，当点声源间距等于或接近超声波波长时，点声源面阵列指向性最好；增加面阵列点声源个数可提高指向性，并使旁瓣的幅值减小。
In the process of handling unexpected events, in order to achieve strong noise transmission of high directivity of transmission, and achieve the goal of making the crowd of illegal gathering to disperse, based on acoustic directional system, we study point source ar- ray directivity function and simulate point source array directivity by MATLAB and discuss the effects of different array element spacing and the number of arrays on the ultrasonic di- rectivity. Simulation results show that, the faceted point source array directivity is the best when the point source spacing is equal to or close to the ultrasonic wavelength and increasing the number can improve the surface point source array directivity and reduce the side-lobe amplitude.
作者
何凯凯
翟晓军
杨晓艺
HE Kaikai ZHAI Xiaojun YANG Xiaoyi(Postgraduate Brigade College of Equipment Engineering, Engineering University of PAP, Xi＇an 710086,China)
出处
《武警工程大学学报》
2016年第6期39-42,共4页
Journal of Engineering University of the Chinese People＇s Armed Police Force
关键词
定向攻击
点声源面阵列
指向性
仿真
directinal attack
ultrasonic wave
point source surface array
simulation
