高声阻抗下低声阻抗的脱粘检测一直是超声检测领域中的难题。文章针对钢层下橡胶层分层信号,互相关最大为准则,采用小波包子带分解自适应滤波方法提取橡胶层脱粘的二界面信号,给出了仿真信号和实验信号的处理结果,显示了该方法的有效性和可行性。 Debonding detection of low acoustic impedance at high acoustic impedance has been a challenge in the field of ultrasonic testing. In this paper, according to the principle that the maximum cross-correlation of the rubber layer signals and the cross-correlation of the rubber layer under the steel layer is the criterion, a wavelet packet subband decomposition adaptive filtering method is used to extract the debonded two interface signals of the rubber layer. The processing results of the simulation signal and the experimental signal are given. The effectiveness and feasibility of this method.