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1 引言 探地雷达(GPR)采用的是时间域脉冲雷达,将宽频带的脉冲发射到地下介质中,通过接收反射信号达到探测地下目标的目的。早在50年代人们就发现由爆炸产生的电磁脉冲(EMP)除对高压电力网产生干扰外,还能穿透地表。基于这种认识,人们在对EMP研究的基础上开发了GPR技术,但由于地下介质的复杂性、非均质性、无规律性以及多变性,时至今日仍有些难题有待解决。近年来,随着电子技术的飞速发展,地震勘探技术的日趋成熟,GPR技术取得了突破性的进展,在我国地矿、煤炭、铁道、水利、建筑等部门和单位相继引进国外的仪器和设
1 Introduction Ground penetrating radar (GPR) uses time-domain pulse radar, which transmits broadband pulses to underground media and receives reflected signals to detect underground targets. As early as the 1950s, people discovered that the electromagnetic pulse (EMP) generated by the explosion could penetrate the earth surface in addition to interfering with the high-voltage power network. Based on this understanding, GPR technology has been developed on the basis of EMP research. However, due to the complexity, heterogeneity, irregularity and variability of underground media, some problems remain to be solved. In recent years, with the rapid development of electronic technology, seismic exploration technology has matured, GPR technology has made a breakthrough, in China’s mines, coal, railway, water conservancy, construction and other departments and units have introduced foreign instruments and facilities