探地雷达三维物理模型试验及信号处理

摘要

为了研究探地雷达对三维物理模型的探测数据的信号处理问题,本文首先通过三维物理模型试验模拟隧道衬砌空洞病害;其次采用探地雷达对模型进行探测;最后使用RADAN7软件和MATLAB软件编辑小波软阈值滤波程序对探测数据进行对比处理.通过RADAN7及小波分析阈值滤波对探地雷达探测数据进行分析比较发现:小波变换去噪相对彻底,有用信号保留相对完整,图像更加清晰,目标体空洞的特征得到了显著的加强;小波变换能够很好地表现信号非平稳性,如边缘、尖峰和断点等.因此小波分析阈值滤波对于探地雷达的信号的滤波效果更加有效,能够为实际工程提供有效的解释依据.%In order to study the signal processing of GPR detection data by GPR,the 3D tunneling cavity tunneling was simulated by three-dimensional physical model test,followed by GPR to detect the model. Finally, the software RADAN7 and MATLAB software were used to edit the wavelet soft threshold filtering Program to detect the data for comparison processing. The results show that the denoising by wavelet transform is relatively complete by using RAD-AN7 and wavelet analysis thresholding,and the signal preservation is relatively complete and the image is clearer. The characteristics of the target cavity are significantly strengthened. Wavelet transform can be very good performance of sig-nal non-stationary,such as edges, spikes and breakpoints. Therefore, the wavelet analysis of threshold filtering for ground-penetrating radar signal filtering effect is more effective,and can provide an effective basis for engineering.