多层介质中路面雷达电磁波传播数值模拟  

Numerical simulation of ground penetrating radar wave propagation in multi-layered medium

作　　者：钟燕辉[1] 张蓓[2] 王复明[2] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024 [2]郑州大学环境与水利学院

出　　处：《大连理工大学学报》2006年第5期725-729,共5页Journal of Dalian University of Technology

基　　金：国家杰出青年科学基金资助项目(19625205)

摘　　要：针对高效、快速、连续、无损的路面雷达应用技术存在的问题,研究了路面雷达电磁波在多层介质中的传播规律.基于电磁波理论的基本原理,从M axw e ll方程着手,建立了雷达电磁波在路面结构体系中的传播模型.该模型考虑了介质介电常数虚部的贡献,理论上更加严谨,并更接近于道路工程实际.应用该模型,模拟合成了多层路面结构体系中雷达电磁波的反射信号,将其与实测信号对比,验证了所建立模拟方法的正确性和适用性.The ground penetrating radar （GPR） is an effective, speedy, continuous and non-destructive testing equipment. In order to solve the problems of GPR-applied technology, the characteristics of GPR electromagnetic wave propagation in multi-layered medium is studied, and the forward model of GPR electromagnetic wave propagation in pavement structures is developed based on Maxwell equation in electromagnetic theory. This forward model is more precise in theory and more close to the pavement engineering condition since the imaginary part of dielectric constant is taken into account. Applying this forward model, the reflected signals of GPR wave propagation in multi-layered pavement structure system is simulated, thus the correctness and the flexibility of the modeling method presented are verified by comparing simulated signals with practical signals.

关 键 词：路面雷达(GPR) 电磁波 传播模型 介电常数 路面结构 

分 类 号：U412.2[交通运输工程—道路与铁道工程]