基于偶对称性小波的双路振动信号相位精确测量

Accurate Phase-Measuring of Two-Channel Vibrating Signal Based on Meyer Even Symmetry

双路振动信号相位测量系统的硬件电路存在着较大的测量误差 .本文改用 A/D转换后利用软件计算来对其进行相位测量 ,并研究利用偶对称性小波对采集到的振动信号变换处理 ,可以有效地去除 A/D转换中叠加的采集噪声、以及谐波等噪声 .仿真计算表明 ,本文提出的方法是有效的 。

The phase-measuring system of the two-channel vibrating based on the hardware structure has large measuring errors. With wavelet transform by selecting proper kernel function and scaling factor, the signal-to-noise ratio of the original waveform with sampling noise can be improved and the peak points of the signal can be kept unshifted. The results of simulation and experiment were also provided.