基于探地雷达的农田地埋管管径探测

Detection of underground pipeline diameter in farmland using ground-penetrating radar

为探求农田地埋管管径的探测技术,满足现有大量农田地埋管工程验收的需求,研究了采用探地雷达探测农田土壤中地埋管管径的方法。通过地埋管线目标的雷达图像的能量梯度,提取管线目标顶点和双曲线边缘,并运用最小二乘原理,对地埋管管径进行计算。研究表明:采用探地雷达探测农田中地埋管管径是可行的,该技术可探测出埋深0.5m,管径在75～110mm的聚氯乙烯(polyvinyl chloride,PVC)地埋管管径,为农田水利工程验收提供了新的参考。

To meet the demand for pipeline project acceptance, the method of detecting underground pipeline diameter in farmland was studied using ground penetrating radar. Based on the energy gradient of pipeline target radar image, the vertex and edge of target pipelines was extracted, and the theory of Least-squares was used to calculate the underground pipeline diameter. The results showed that using ground-penetrating radar on detecting underground pipeline diameter in farmland was feasible, and could detect the diameter of polyvinyl chloride pipeline with the diameter of 75- 110 mm and buried depth of 0.5m. This study provides a new technology for the acceptance of irrigation and water conservancy project.