This method firstly removes the effect of reference signal on time delay estimation,then the triple cepstrum of remain signal is made,finally estimates the time delay of signals accurately.

• 该方法用维纳解卷积消除了检测始波对时间延迟估计的影响,并对剩余信号进行了三次能量倒谱分析,准确直观地估计出了信号延迟时间。该方法已在开发的超声探伤系统中得到了验证。