探地雷达技术应用于工程检测的实验教学

摘要

探地雷达(ground-penetrating radar,GPR)是一种广泛地应用于地下工程检测的新技术,许多大学都开设了GPR的基础理论和方法技术的教学课程.如何让学生在有限的时间里很好地了解其工作原理和应用效果,需要从仪器的选型、教学模型的制作等方面进行设计.介绍了英国Utsi Electronics公司的Groundvue 3探地雷达,通过以1 GHz天线开展的室内模型实验,有效地展示了其工程检测效果,通过以400 MHz天线开展的室外场地实验,有效地介绍了其探测能力.2种天线在2个场合下的实验教学,对学生完整地理解GPR技术效果十分显著.%The ground-penetrating radar(GPR) is a new kind of technique used widely in engineering detection.Many institutes set up the course about the principle and application of GPR.It is necessary to make a comprehensive design for the sake of students' entire understanding of GPR quickly.This paper deals with Groundvue 3, a kind of ground-penetrating radar introduced from Utsi Electronics Corporation in the United Kingdom.Experiment teaching of the indoor model with the antenna frequency 1 GHz shows adequately the detection ability of GPR, and experiment teaching outdoor ground with the antenna frequency 400 MHz brings forth the exploration potential.The compositive experiments of the indoor model with 1 GHz antenna and outdoor ground with 400 MHz antenna bring a wonderful teaching effect.