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| 路面材料介电常数非均匀模型雷达电磁波模拟 | |
| 引用本文： | 蔡迎春,王复明,刘俊.路面材料介电常数非均匀模型雷达电磁波模拟[J].大连理工大学学报,2009,49(4):571-575. |
| 作者姓名： | 蔡迎春 王复明 刘俊 |
| 作者单位： | 1. 大连理工大学,土木水利学院,辽宁,大连,116024;郑州大学,环境与水利学院,河南,郑州,450002 2. 郑州大学,环境与水利学院,河南,郑州,450002 3. 大连理工大学,土木水利学院,辽宁,大连,116024 |
| 基金项目： | 河南省杰出人才创新基金资助项目(0321000800) |
| 摘 要： | 针对实际路面材料颗粒的随机分布特点以及离散颗粒对电磁波的散射事实,建立了半空间路面雷达电磁波一维时域有限差分(1D-FDTD)方程,实现了沥青路面材料均匀和非均匀介电常数两种模型的空气耦合天线雷达电磁波正演模拟,并对以上两种模拟波与实测波形进行了对比分析.结果表明:路面材料的非均匀介电常数模型更加符合工程实际,为路面雷达进一步精确检测厚度及其他应用提供了新的方法. |
| 关 键 词： | 路面雷达 一维时域有限差分法 非均匀的 介电常数 |
Ground penetrating radar electromagnetic waves simulation of pavement model with pavement material's inhomogeneous dielectric parameter |
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| CAI Yingchun,WANG Fuming,LIU Jun.Ground penetrating radar electromagnetic waves simulation of pavement model with pavement material''s inhomogeneous dielectric parameter[J].Journal of Dalian University of Technology,2009,49(4):571-575. | |
| Authors: | CAI Yingchun WANG Fuming LIU Jun |
| Institution: | CAI Ying-chun1,2,WANG Fu-ming2,LIU Jun11.School of Civil , Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China,2.School of Environmental , Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450002 |
| Abstract: | According to random distribution characteristics of practical pavement particles and scattering of dispersed particles on electromagnetic wave,the one-dimension finite difference time domain (1D-FDTD) equations of ground penetrating radar.(GPR) electromagnetic wave,which propagates in half-space,are briefly established.And the electromagnetic wave of the air-coupled antenna GPR which propagates in asphalt pavement with surface material's homogeneous or inhomogeneous dielectric parameter are all forward simulated.Then the comparisons between the two models simulation waves and actual measurement wave are analyzed.It is concluded that the first model with the surfaca material's dielectric parameter selected on random can inosculate the actual measurement wave and well correspond to the reality.The research is helpful for GPR backward simulation as measuring thickness and other applications. |
| Keywords: | ground penetrating radar (GPR) 1D-FDTD method inhomogeneous dielectric constant |
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