摘要
鉴于大多数近场声全息噪声源识别系统成本较高,基于LabVIEW开发成本低、适用性强的近场声全息噪声源识别系统。该系统可在传声器数量较多时使用阵列快照,也可在传声器数量有限或仪器通道个数有限时用线阵或面阵分块扫描获取全息面信息;通过嵌入的MATLAB近场声全息计算程序可以实现声场的重建和预测;通过LabVIEW可视化控件可以方便地实现重建和预测声场数据的显示。首先对该系统的原理及实现过程进行介绍,随后通过实验检验该系统的有效性。
Since most of the noise source identification systems are costly,a near-field acoustical-holography noise-source-identification system based on LabVIEW is developed in this paper.This system is at low-cost and more practical compared with the other systems.Based on the proposed system,the acquisition method of array snapshot can be used when having a larger number of microphones;the scanning method can also be used when the number of microphone or the instrument channel is limited.Through the embedded MATLAB program for near-field acoustic holography calculation,the sound field can be reconstructed and predicted.Meanwhile,the reconstruction and prediction can be displayed through LabVIEW visual controls.In this paper,the principle and realization process of the proposed system is introduced,and then its validity is verified by the experiment.
出处
《噪声与振动控制》
CSCD
北大核心
2010年第6期140-144,共5页
Noise and Vibration Control
基金
国家自然科学基金资助项目(项目编号:50675056
10874037)
霍英东教育基金会资助项目(项目编号:111058)
