辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(2)：219-225,7.DOI:10.11956/j.issn.1008-0562.20240069
基于交变电磁场的管道裂纹检测方法
Pipeline crack detection method based on alternating electromagnetic field
摘要
Abstract
In order to realize the effective detection of pipeline crack defects,a crack detection method based on alternating electromagnetic field is proposed to realize the effective detection of cracks with different directions.The mathematical model of alternating electromagnetic field detection is established.Combined with the basic structure of U type sensor,the detection principle of alternating electromagnetic field is studied,and the distribution law of electromagnetic field generated on the surface of pipeline is analyzed.The distorted magnetic field signals caused by circumferential and axial cracks are extracted and analyzed by finite element simulation.The experimental platform is built to verify the influence of crack defect depth on the detection signal.The results show that the U type detection structure can effectively detect the circumferential and axial cracks on the surface of the pipeline.When there is a circumferential crack,the AC leakage magnetic field plays a dominant role in the detection.When there is an axial crack,the eddy current plays a dominant role in the detection.The judgment of the crack direction can be realized according to the reverse signal characteristics of the z-axis components of the two.The research conclusion provides a new detection idea for pipeline crack detection.关键词
交变电磁场/裂纹缺陷/管道内检测/磁感应强度/电磁场畸变Key words
alternating electromagnetic fields/crack defects/in-pipe inspection/magnetic induction intensity/electromagnetic field distortion分类
能源科技引用本文复制引用
田野,陈海艳,李坤,丁融,杨理践..基于交变电磁场的管道裂纹检测方法[J].辽宁工程技术大学学报（自然科学版）,2025,44(2):219-225,7.基金项目
辽宁省自然科学基金项目(2019-MS-243) （2019-MS-243）
