基于Hough变换提取土体介电常数的方法

Method for obtaining soil dielectric constant based on Hough transformation

为了无损定性分析公路工程中填土路基的含水量,针对土体介电常数对含水量的变化非常敏感,研究一种快速提取土体介电常数的方法。基于此思想,通过探地雷达数据,应用现代数学理论中的Hough变换方法,利用计算机Matlab语言编程,快速提取电磁波在介质中的传播速度获取土体介质的介电常数。将所提取的介电常数数据与实际试验测试数据相比较,基本一致。研究结果表明:基于Hough变换提取土体介电常数在无损获取介质介电常数方面是一种行之有效的方法,它可做为一种无损快速检测技术,推广应用于填土路基工程质量的评定。

In order to analyze the water content of highway soil-fill roadbed, while the dielectric constant of soil body is sensitive to the change of water content in it, a fast method for obtaining the dielectric constants was studied. This research used ground penetrating radar and adopted the mathematical theory of Hough transformation and MATLAB programming languages to quickly extract the velocity of wave in the medium so as to obtain the dielectric constants. The data obtained in this way were largely in correspondence with the actual experimental data. The research results show that this is an effective method in obtaining dielectric constants in a non-destructive way, which can be popularized and applied in the quality evaluation of soil-fill roadbed project. 2 tabs, 4 figs, 7 refs.