基于频率步进法的沥青路面厚度和介电常数测量  

Asphalt pavement thickness and dielectric constant measurement based on stepped-frequency method

作　　者：蔡泉华 杨锋 严守靖 王洋洋 奚晨晨 魏金涛 孙团伟 CAI Quanhua;YANG Feng;YAN Shoujing;WANG Yangyang;XI Chenchen;WEI Jintao;SUN Tuanwei(Institute of Road Engineering,Zhejiang Scientific Research Institute of Transport,Hangzhou 310023,China;Zhejiang Province Key Laboratory of Road and Bridge Detection and Maintenance Technology Research,Hangzhou 310023,China;Zhejiang Jiaotou Traffic Construction Management Co.,Ltd.,Hangzhou 310014,China)

机构地区：[1]浙江省交通运输科学研究院道路工程研究所,浙江杭州310023 [2]浙江省道桥检测与养护技术研究重点实验室,浙江杭州310023 [3]浙江交投交通建设管理有限公司,浙江杭州310014

出　　处：《现代电子技术》2023年第14期38-44,共7页Modern Electronics Technique

基　　金：浙江省交通运输科学研究院科技创新专项(ZK202202);浙江省交通运输厅资助项目(2019054)。

摘　　要：针对三维探地雷达传统计算方法中直接取芯法和振幅全反射法存在代表性差、计算效率低等问题,文中对直接取芯和振幅全反射两种计算方法的优点与缺陷进行分析,结合三维探地雷达的电磁波在路面内部传播的几何关系,提出一种基于频率步进法(SFL)的计算模型。选取杭绍台高速公路K91+600~K101+700段开展沥青路面厚度和介电常数测试,比较不同方法的计算精度,以验证频率步进法计算模型的准确性。研究结果表明:频率步进法对于路面面层厚度和介电常数的测量误差分别为3.85%和4.69%,相对于振幅全反射法,路面厚度和介电常数测量误差分别降低6.37%和10.59%。频率步进法具有较高的检测精度,能为沥青路面厚度和介电常数测量提供新的计算途径。In allusion to the problems of poor representativeness and low computational efficiency of direct coring method and amplitude total reflection method in the traditional calculation methods of 3D ground penetrating radar,the advantages and disadvantages of both methods are analyzed.In combination of the geometric relationship of electromagnetic wave propagation inside the road surface of 3D ground penetrating radar,a calculation model based on stepped-frequency method is proposed.The K91+600~K101+700 section of the Hangzhou Shaoxing Tai Expressway is seleced for asphalt pavement thickness and dielectric constant testing,and the calculation accuracy of different methods is compared to verify the accuracy of the calculation model of the stepped-frequency method.The research results show that the measurement errors of stepped-frequency method for pavement thickness and dielectric constant are 3.85%and 4.69%,respectively.In comparison with amplitude total reflection method,its measurement errors of pavement thickness and dielectric constant are reduced by 6.37%and 10.59%,respectively.The stepped-frequency method has high detection accuracy and can provide a new calculation way for measuring the asphalt pavement thickness and dielectric constant.

关 键 词：沥青路面 频率步进法 计算模型 沥青路面厚度 介电常数 探地雷达 

分 类 号：TN919-34[电子电信—通信与信息系统] U416.2[电子电信—信息与通信工程]