磁梯度技术在深埋并行金属管线探测中的应用

The Application of Magnetic Gradient to the Detection of Parallel Buried Metal Pipe

深埋金属管线是管线探测的难题,而探测并行金属管线则更是难上加难。利用地球磁场对金属管道产生磁化作用的原理,深入研究了等径与不等径并行金属管道的磁梯度场,就其梯度场的形态特征、影响梯度场的因素进行探讨;借助于计算机正演模拟了不同管径、不同磁方位角并行金属管道磁梯度场的形态,以及金属管道两侧的磁梯度曲线异常,最终达到快速识别并行管线与单一金属管线,精确判断管线位置的目的。

The detection of buried metal pipe is a difficult,and the detection of parallel metal lines is even more difficult.This paper uses the principle of magnetization of the earth＇s magnetic field on the metal pipeline and has a depth study on the magnetic gradient field of equal and unequal diameter parallel metal pipes.The formative characteristics and the factors affecting the gradient field are discussed.By means of a computer simulation of magnetic gradient field forms of different diameters and magnetic azimuth of parallel metal pipes,and the magnetic gradient anomalies on the sides of metal pipes,ultimately parallel lines and single metal pipe can be identified quickly,and the location of pipe lines can be determined accurately.