沈阳工业大学学报2017，Vol.39Issue(1)：43-47,5.DOI:10.7688/j.issn.1000-1646.2017.01.09
油气管道特殊部件的漏磁检测信号特征分析
Feature analysis on magnetic flux leakage detection signal for special parts of oil and gas pipeline
摘要
Abstract
Aiming at the structural characteristics of special parts of oil and gas pipeline,the characteristics of magnetic field generated after the magnetization of pipeline were analyzed.Based on the pipeline magnetic flux leakage inner inspection principle and Maxwell equation,the Comsol finite element simulation software was used to perform the simulation for the special parts and defects of pipeline.In addition,the channel number occupied by the axial component Bx of magnetic flux leakage signal,the appearing sequence of positive and negative peak Bx values,the Bx amplitude and axial length were taken as the basis for analyzing and distinguishing the special parts and defects of pipeline.The feature analysis on the Bx component of total magnetic flux leakage signal under the condition of existing the defects in the special parts of pipeline was carried out.When the defect signal was in the inner side of reinforcing plate signal and the polarity was opposite,the defect signal was regarded as a reinforcing plate defect.The results show that the proposed method has certain feasibility in the defect identification of special parts of pipelines.关键词
永磁体/管道内检测/轴向分量/特殊部件/信号特征分析/麦克斯韦方程/有限元仿真/漏磁Key words
permanent magnet/pipeline inner inspection/axial component/special part/signal feature analysis/Maxwell equation/finite element simulation/magnetic flux leakage分类
矿业与冶金引用本文复制引用
杨理践,郭天昊,高松巍,刘斌..油气管道特殊部件的漏磁检测信号特征分析[J].沈阳工业大学学报,2017,39(1):43-47,5.基金项目
科技部国家重大仪表专项资助项目（2012YQ090175）；国家863计划资助项目（2012AA040104）；国家自然科学基金资助项目（61571308）． （）
