带包覆层管道缺陷的脉冲涡流检测方法研究  

Research on pulse eddy current testing method for pipeline defects with coating layer

作　　者：李佳东 张彦杰 邱俊杰 赵希来 邬宇 焦少妮 任思齐 Li Jiadong;Zhang Yanjie;Qiu Junjie;Zhao Xilai;Wu Yu;Jiao Shaoni;Ren Siqi(College of Mechanical Engineering of Taiyuan University of Technology,Taiyuan 030024,China;Haian&Taiyuan University of Technology Advanced Manufacturing and Intelligent Equipment Industrial Research Institute,Haian 226601,China;Shanxi Inspection and Testing Center,Taiyuan 030006,China;College of Electrical and Power Engineering of Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械工程学院,太原030024 [2]海安太原理工大学先进制造与智能装备产业研究院,海安226601 [3]山西省检验检测中心,太原030006 [4]太原理工大学电气与动力工程学院,太原030024

出　　处：《电子测量与仪器学报》2024年第10期137-146,共10页Journal of Electronic Measurement and Instrumentation

基　　金：国家市场监督管理总局技术保障专项项目(2023YJ13);山西省应用基础研究计划青年项目(20210302124354,20210302124051);海安太原理工大学先进制造与智能装备产业研究院开放研发项目(2023HA-TYUTKFYF005)资助。

摘　　要：包覆层管道被广泛应用于化工、石油、燃气等行业,管道腐蚀引起的裂缝、局部腐蚀等都可能带来重大安全隐患,因此对管道缺陷的检测变得极其重要。但管道上较厚的包覆层导致常规的无损检测很难检测到管道的缺陷,而脉冲涡流无损检测技术因其具有强大的激励能量和出色的穿透能力,能够在不拆除包覆层的情况下对管道进行缺陷检测。本研究旨在分析不同信号特征下对缺陷检测的有效性,文章首先利用仿真软件建立带包覆层管道的三维有限元模型,其次选取差分电压峰值、差分电压峰值时间、差分电压过零时间、差分信号基频幅值作为信号特征,对信号特征与缺陷的关系进行分析,最终选取出更适合的评估信号。仿真结果表明:差分电压峰值与基频幅值随缺陷弧长增大而增大,随缺陷深度增大而增大。峰值时间、过零时间只与深度有关,且随外表面深度增大而增大、随内表面深度增大而减小。并通过信号特征与缺陷的拟合,选取出适用于缺陷分辨的信号。这项研究有助于优化脉冲涡流无损检测技术在包覆层管道缺陷检测中的应用,提高检测的准确性和效率。Coated pipelines are widely used in industries such as chemical,petroleum,and gas.Cracks and localized corrosion caused by pipeline corrosion may pose significant safety hazards,making the detection of pipeline defects extremely important.However,the thicker coating on the pipeline makes it difficult for conventional non-destructive testing to detect defects in the pipeline.Pulse eddy current non-destructive testing technology,due to its strong excitation energy and excellent penetration ability,can detect defects in the pipeline without removing the coating.This study aims to analyze the effectiveness of defect detection under different signal characteristics.Firstly,a three-dimensional finite element model of a pipeline with a coating layer is established using simulation software.Secondly,differential voltage peak,differential voltage peak time,differential voltage zero crossing time,and differential signal fundamental frequency amplitude are selected as signal features to analyze the relationship between signal features and defects.Finally,a more suitable evaluation signal is selected.The simulation results show that the peak value of differential voltage and the amplitude of fundamental frequency increase with the increase of defect arc length and with the increase of defect depth.The peak time and zero crossing time are only related to depth,and increase with the depth of the outer surface and decrease with the depth of the inner surface.And by fitting signal features with defects,select signals suitable for defect resolution.This study helps to optimize the application of pulsed eddy current non-destructive testing technology in defect detection of coated pipelines,improving the accuracy and efficiency of detection.

关 键 词：脉冲涡流 包覆层管道 有限元仿真 信号分析 

分 类 号：TN04[电子电信—物理电子学] TG115.28[金属学及工艺—物理冶金]