基于地磁成像的管线探测系统

Pipeline Detection System Based on Geomagnetic Imaging

为了精确探测埋藏在地下的各种管线,提出了基于地磁成像的管线探测系统。该系统将采集到的地表磁场垂直分量的脉冲信号强度与介质各向同性的均匀地层中地表上方磁场垂直分量的脉冲信号强度进行对比,利用对比后的数据形成反映被测区域上方脉冲信号强弱分布的三维图象,从而对地下介质的性质作出判断。测试结果表明,该系统对地下已知管线探测的MAPE为2.66%,对地下未知管线探测的MAPE为3.33%,提高了同类探测的精度,对地下各种管线的探测行之有效。

In order to accurately detect a variety of buried pipelines underground,a pipeline detection system based on geomagnetic imaging was proposed.The system compares intensity of pulse signals collected from vertical component of surface magnetic field with intensity of pulse signals collected from vertical component of magnetic field above surface in homogeneous stratum with isotropic medium,and uses the compared data to form three-dimensional images which can reflect the distribution of pulse（signal＇s） strength on top of measured region,so as to judge the nature of underground medium.The experiment result showed that values of MAPE detected by the system for underground known pipeline and unknown pipeline are 2.66% and 3.33% separately,and the accuracy of the same detection is improved.The system is good for all kinds of detection of underground pipelines.