小波多尺度分析在岩石锚杆质量弹性波无损检测中的应用

 锚固体内不密实的位置和灌浆饱和度是评价锚杆质 量的两个重要参数。在采用弹性波无损检测方法中，如何从检测信号中分离高频子波成份非 常重要。小波分析作为时频分析方法，具有多尺度分析功能，在时间域和频率域均具有表征 信号局部特征的能力。通过对理论模型曲线和工程实测锚杆信号的小波多尺度分析研究表明，小波域内，不同界面反射波的高频子波成份能较好地分离开来。

Application of Multi-resolution Analysis in Detection of Rock Anchor Bar Quality Using Elastic Wave Non-destructive Method

Uncompacted location and grouting saturation degree in the zone of anchorage bar are the two main parameters for judging rock bolts quality. At present, these two parameters are mainly detected by elastic wave method. It is important how to separate the high frequency wavelets from detected information. Wavelet analysis as time-frequency analysis method has multi-scale analysis functions and ability of characterizing local features in time domain and frequencies domain. Based on the wavelet multi-resolution research of theoretical model curves and engineering information, the results show that high frequency from different reflection interfaces can be separated in wavelet domain.