含缺陷管道磁化状态与漏磁信号规律研究  

The influence of excitation intensity on pipeline magnetic flux leakage detection

作　　者：熊毅[1,2] 刘帅 黄鹏[1,2] 董一凡 李秋 Xiong Yi;Liu Shuai;Huang Peng;Dong Yifan;Li Qiu(College of Safety and Ocean Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Key Laboratory of Oil and Gas Safety and Emergency Technology,Ministry of Emergency Management,Beijing 102249,China;Oil and Gas Control Center of National Oil and Gas Pipeline Network Group Co.,Ltd.,Beijing 100028,China)

机构地区：[1]中国石油大学(北京)安全与海洋工程学院,北京102249 [2]应急管理部油气生产安全与应急技术重点实验室,北京102249 [3]国家石油天然气管网集团有限公司油气调控中心,北京100028

出　　处：《电子测量技术》2023年第12期187-192,共6页Electronic Measurement Technology

摘　　要：漏磁检测技术是管道内检测领域常用的检测方法,基于漏磁信号的分析对于管道安全评价具有重要意义。建立漏磁检测的二维仿真模型,研究漏磁检测中励磁强度对于漏磁信号的影响;基于磁化状态对漏磁信号影响的物理模型,可将励磁强度分为3个阶段,即初始增长阶段、非线性增长阶段和饱和线性增长阶段。结果表明,3个阶段的分界点只受缺陷深度的影响,仿真结果与物理模型具有很好的一致性,所划分的3个阶段有效衡量管道漏磁检测中励磁强度的影响,对于漏磁信号采集分析具有指导意义。Magnetic flux leakage detection technology is a common detection method in the field of pipeline internal detection.The analysis base on magnetic flux leakage signal is of great significance for pipeline safety evaluation.Establishing a two-dimensional simulation model of magnetic flux leakage detection,and studying the influence of excitation intensity on magnetic flux leakage signal in magnetic flux leakage detection;Based on the physical model of the influence of magnetization state on MFL signal,the excitation intensity is divided into three stages,namely,initial growth stage,nonlinear growth stage and saturated linear growth stage.The results show that the dividing points of the three stages is only affected by the depth of defects,and the simulation results are in good agreement with the physical model.The divided three stages effectively measure the influence of excitation intensity in pipeline magnetic flux leakage detection,which has guiding significance for magnetic flux leakage signal acquisition and analysis.

关 键 词：漏磁检测 励磁强度 磁化程度 有限元仿真 

分 类 号：TG115.284[金属学及工艺—物理冶金]