阐述了激光多普勒测速仪的基本原理和小波滤波相关理论,运用小波滤波对多普勒信号进行分解、阈值处理、小波重构,并用Matlab软件进行仿真.结果表明,对激光多普勒信号进行小波分解,并对每一级小波进行阈值处理后,得到了较好的滤波效果,且测速结果优于直接傅里叶变换.%The basic principle of laser Doppler velocimeter and the theory of wavelet filtering were expounded.Wavelet filtration was used for Doppler signal decomposition,threshold processing and wavelet reconstruction and Matlab software was used for simulation.The results show that when the laser Doppler signal is decomposed by wavelet and the wavelet for each level is processed by thresholding,and the filtration may get a better effect and the velocimetry outcome is better than that obtained by direct Fourier transform.
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