路面雷达检测技术初步研究

路用探地雷达的基本原理是向地下发送脉冲形式的高频电磁波。电磁波在地下介质传播过程中．当遇到存在电性差异的地下目标体，如空洞、路面结构层分接口等时，电磁波便发生反射，返回到地面时由天线接收。在对接收到的雷达波进行处理和分析的基础上，根据接收到的雷达波形、强度和双程走时等参数可推断地下目标体的空间位置、几何形态。采用地质雷达对路面脱空缺陷雷达检测进行初步研究，得到了路面脱空缺陷识别方法。

Preliminary Research on Radar Detection Technology of Pavement

The basic principle of Ground Penetrating Radar（GPR） is transmitting pulse to the underground in form of the high frequency electromagnetic wave. When the electric different exists between underground objects during the transmission of electromagnetic wave in underground medium, such as voids, the layer interface of pavement structure, and so on, the electromagnetic wave is reflected back to the ground surface and received by the antenna. According to the received radar＇s waveform, intensity, two-way travel time and other parameters, the underground objeet＇s spatial location and geometric form can be inferred on the basis of that received radar waves are processed and analyzed. In this paper, preliminary research on pavement void defect detection is carried on by using the geological radar, therefore the identification method of pavement void defect is obtained.