超声相控阵井壁成像检测的回波信号处理

Signal Processing of Ultrasonic Phased Array Echo of Borehole Imaging Testing

利用复小波变换法对井壁回波信号进行包络提取,并采用基于复小波变换的井壁回波信号处理方法进行了超声相控阵成像检测试验。试验结果表明,基于复小波变换的井壁回波信号处理方法能够准确提取井壁超声幅度数据,从而有效地提高检测系统的信噪比,增强图像对比度,获得更好的井壁成像显示效果。

This paper proposes the use of complex wavelet transform to extract the envelope of borehole echo signal,and the image detection test is carried out by using the echo signal processing method of borehole wall based on complex wavelet transform.Experimental results show that the extraction of borehole echo envelope and the signal processing method based on complex wavelet transform can effectively improve the signal to noise ratio of detection system,enhance image contrast,and display better borehole image.