管道磁聚焦瞬变电磁技术设计与实现  

The Design and Implementation of Magnetic Focusing Transient Electromagnetic Method

作　　者：杨勇[1] 王观军[1] 柳言国[1] 

机构地区：[1]中国石化股份胜利油田分公司技术检测中心,东营257000

出　　处：《科学技术与工程》2014年第27期54-57,共4页Science Technology and Engineering

摘　　要：为克服瞬变电磁法检测埋地管道时局部腐蚀分辨率低、抗干扰能力差的缺点,利用磁信号聚焦技术对其进行改进。首先,给出矩形载流线圈磁场空间分布的计算公式;并利用改进的遗传算法对线圈阵列进行了设计。根据实际检测需求,设计了一种由三线圈组成的阵列。仿真结果表明阵列60%以上能量聚集于半径0.5 m的圆形区域内。阵列激励磁场测量结果表明,其聚集斑半径小于0.7 m,与传统瞬变电磁检测仪相比极大提高了管道局部腐蚀分辨率。In order to overcome the disadvantage of transient electromagnetic（ TEM） for detect the buried metal pipe such as the lower local corrosion resolutions and anti-interference ability,a new method of focusing magnetic field signal has been provided. At first,the formula of calculating the spatial distribution of rectangular current-carrying coil excitation is deduces. And then,the magnetic focusing coil array has been designed using the improved genetic algorithm. A array with three coils,the results of simulation show that above 60% energy excited by the array focus on a circle region which radius is less than 0. 5 m is designed. The magnetic measurement results show that the radius of the focused region exciting by the array is less than 0. 7 m. The results also imply that the array improve the local corrosion resolution compared with the traditional transient electromagnetic instrument.

关 键 词：磁聚焦 瞬变电磁 设计 实现 

分 类 号：TE832.9[石油与天然气工程—油气储运工程]