Based on the characteristics of wavelet transform, the wavelet Singularity Detection is used to locate the feature point and anomaly extension of the Rayleigh wave dispersion curve.
基于小波变换原理，利用小波分析中的奇异性检测方法来对瑞利波频散曲线的特征点和波动区段定位。
Wavelet singularity detection index is constructed by displacement. But in actual measurement, displacement error is larger. So it is difficulty to promote the apply in the Practical application.
小波奇异性检测指标是通过位移构造的，在实际测量中，位移的误差较大，造成实际推广使用有一定的难度。
Having good time-frequency localization character, and correctly identifying singularity point in fault signal, Wavelet is the main analysis method in this paper.
小波变换具有良好的时频局部性，具有变焦距的特点，对故障信号中的奇异点能够准确识别，是论文中应用的主要分析方法。
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