NON-DESTRUCTIVE PAVEMENT LAYER THICKNESS MEASUREMENT USING EMPIRICAL MODE DECOMPOSITION WITH GPR  

作　　者：Li Qiang Chen Jie Liu Xiaojun Fang Guangyou 

机构地区：[1]Key Laboratory of Electromagnetic Radiation and Sensing Technology, Institute of Electronics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Journal of Electronics(China)》2014年第6期619-627,共9页电子科学学刊（英文版）

基　　金：Supported by the 863 National High Technology Research and Development Program(No.2012AA121901)

摘　　要：Ground Penetrating Radar(GPR) is an effective Non-Destructive Testing(NDT) technique for highway pavement surveys, which is able to acquire continuous pavement data compared with traditional core drilling method. In this study, we proposed an accurate and efficient method to estimate the thickness of each pavement layer using an air-coupled GPR system. For this work, the main difficulties are estimating each pavement layer's time delay and dielectric constant. We first give the basic signal model for pavement evaluation, and then present an Intrinsic Mode Functions(IMFs) product detector to determine each pavement layer's time delay. This method is based on Empirical Mode Decomposition(EMD), which is an adaptive signal decomposition procedure and proved to be suitable for suppressing noises in GPR signal. The dielectric constant was determined by metal reflection measurement. The laboratory and highway experiments illustrate that the proposed thickness estimation method yields reasonable result, thus meets the requirements of practical highway pavement survey with massive GPR data.Ground Penetrating Radar （GPR） is an effective Non-Destructive Testing （NDT） technique for highway pavement surveys, which is able to acquire continuous pavement data compared with traditional core drilling method. In this study, we proposed an accurate and efficient method to estimate the thickness of each pavement layer using an air-coupled GPR system. For this work, the main difficulties are estimating each pavement layer＇s time delay and dielectric constant. We first give the basic signal model for pavement evaluation, and then present an Intrinsic Mode Functions （IMFs） product detector to determine each pavement layer＇s time delay. This method is based on Empirical Mode Decomposition （EMD）, which is an adaptive signal decomposition procedure and proved to be suitable for suppressing noises in GPR signal. The dielectric constant was determined by metal reflection measurement. The laboratory and highway experiments illustrate that the proposed thickness estimation method yields reasonable result, thus meets the requirements of practical highway pavement survey with massive GPR data.

关 键 词：Ground Penetrating Radar(GPR) Pavement thickness Non-Destructive Testing(NDT) Dielectric constant Empirical Mode Decomposition(EMD) 

分 类 号：TN957[电子电信—信号与信息处理]