Air Ultrasonic Signal Localization with a Beamforming Microphone Array
Air Ultrasonic Signal Localization with a Beamforming Microphone Array
复制标题
使用波束形成麦克风阵列进行空气超声波信号定位
DOI：
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发表时间：
2019
影响因子：
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通讯作者：
U. Rabe
中科院分区：
文献类型：
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作者：
A. Movahed;Thomas Waschkies;U. Rabe
无损检测方法用于检查和测试材料和部件的机械特性的不连续性或差异。相控阵信号处理技术已广泛应用于不同领域，但对无源阵列非接触无损检测的研究较少。本文介绍了波束形成技术分析的应用，使用无源合成麦克风阵列来计算超声波频率范围内的声波的起源和强度。在可听频率范围内工作的声学摄像机是众所周知的。为了在更高频率下进行测量，必须考虑麦克风在阵列中的排列。这种布置对阵列特性有很大影响，例如波束方向图、动态特性以及对空间混叠的敏感性。基于仿真，在实际实验中采用了 16、32 和 48 个麦克风和 20 cm 直径的优化配置，以研究阵列分辨率并定位 75 kHz 信号频率下的超声源。结果表明，开发超声波相机来定位超声波声源是有益的。
Nondestructive testing methods are used to inspect and test materials and components for discontinuities or differences in mechanical characteristics. Phased array signal processing techniques have been widely used in different applications, but less research has been conducted on contactless nondestructive testing with passive arrays. This paper presents an application of beamforming techniques analysis using a passive synthetic microphone array to calculate the origin and intensity of sound waves in the ultrasonic frequency range. Acoustic cameras operating in the audible frequency range are well known. In order to conduct measurements in higher frequencies, the arrangement of microphones in an array has to be taken into consideration. This arrangement has a strong influence on the array properties, such as its beam pattern, its dynamics, and its susceptibility to spatial aliasing. Based on simulations, optimized configurations with 16, 32, and 48 microphones and 20 cm diameter were implemented in real experiments to investigate the array resolution and localize ultrasonic sources at 75 kHz signal frequency. The results show that development of an ultrasonic camera to localize ultrasonic sound sources is beneficial.
影响因子：
4.2
作者：
Fan, Chengguang;Caleap, Mihai;Drinkwater, Bruce W.
通讯作者：
Drinkwater, Bruce W.