本文在超声无损检测技术中采用线性调频脉冲信号,并用数字化了的电激励信号自身作为数字匹配滤波器,在不同的时延带宽乘积的系统中得到了声脉冲的压缩信号。实验结果与理论预期值符合得很好.对于Hamming和Gaussian时间加权的信号,其旁瓣抑制可分别达到—41.9dB和—41.5dB.数字匹配滤波技术的引入可以有力地改善超声检测系统的性能。 In this paper, we use the chirp signal in the ultrasonic non-destructive testing technique, and use the digitized electrostimulation signal as the digital matched filter to get the compressed signal of the acoustic pulse in the system of different time-delay bandwidth products. The experimental results agree well with the theoretical ones, and the sidelobe suppression of Hamming and Gaussian time-weighted signals can reach -41.9dB and -41.5dB, respectively. The introduction of digital matched filtering technology can greatly improve the performance of ultrasonic testing system .