基于GPRMax的道路空洞探地雷达正演模拟

Research Numerical Simulation of GPR Based on GprMax for the Road Cavity

三维探地雷达作为一种新兴检测技术,具有快速、高效、无损检测等特点,广泛应用于道路病害体检测中。为快速掌握道路内部空洞在探地雷达下的电磁响应特征,本文使用基于时域有限差分方法原理的GPRMax软件,针对不同形状、不同大小及不同填充物的空洞进行正演模拟。通过正演模拟结果,得到不同类型的雷达数据体,并分析不同类型空洞病害的雷达波场响应特征。

As an emerging detection technology,3D ground-penetrating radar(GPR)has the characteristics of fast,efficient and non-destructive detection,which is widely used in the detection of road damage body.To quickly grasp the electromagnetic response characteristics of underground cavities under GPR,in this paper,we use GPRMax software based on the principle of time-domain finite-difference method to perform forward simulation for cavities with different shapes,sizes and fillers.The results of forward simulation are used to obtain different types of radar data bodies and analyze the radar wave field response characteristics of different types of cavity lesions.