金属亚表面腐蚀缺陷的脉冲调制涡流磁场梯度成像
Gradient-magnetic-field-measurement-based PMEC for Imaging of Metal Subsurface Corrosion
摘 要
由于工况复杂，在役金属构件极易产生亚表面腐蚀缺陷，严重影响其安全运行。脉冲调制涡流检测技术是一种新型脉冲涡流检测技术。相较传统脉冲涡流检测技术,其在金属构件缺陷检测和评估中具有优势;将其与磁场梯度测量技术有效结合，探究其在金属构件亚表面腐蚀缺陷检测中的成像方法和技术优势。通过有限元分析，发现相较脉冲涡流磁场梯度信号，脉冲调制涡流磁场梯度信号对金属亚表面腐蚀缺陷边缘识别具有更高的灵敏度。并且，搭建了相关试验系统，通过试验验证了仿真分析结论。试验结果表明，脉冲调制涡流磁场梯度检测信号对金属构件亚表面腐蚀缺陷成像具有更高的精度，有利于缺陷的检测。
磁场梯度测量
亚表面腐蚀缺陷
缺陷成像
Pulsed-modulation-based eddy current technique
Gradient magnetic field measurement
Subsurface corrosion
Defect imaging
Abstract
Metallic structures are subject to subsurface corrosion due to rigorous environment. As a new inspection technique extended from Pulsed Eddy Current technique (PEC), Pulsed-modulation-based Eddy Current technique (PMEC) has been found advantageous over PEC in evaluation of conductive structures with defects. In this paper, PMEC integrated with Gradient Magnetic Field Measurement (GMFM), namely GMFM-based PMEC is proposed particularly for subsurface corrosion imaging. Through simulations, the advantages of GMFM-based PMEC for defect imaging of subsurface corrosion are investigated. A series of experiments have been conducted in a bid to verify the conclusion drawn from simulations. Through simulations and experiments, GMFM-based PMEC can carry out the imaging with high accuracy for subsurface corrosion.
中图分类号 TG115.28 DOI 10.11973/wsjc201604003
所属栏目 科研成果与学术交流
基金项目 国家自然科学基金资助项目(51477127)
收稿日期 2015/7/30
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备注闫贝(1986-)，男，硕士研究生，研究方向为电磁无损检测理论与试验。
引用该论文: YAN Bei,LI Yong,LI Da,LI Yi-li,CHEN Zhen-mao,WANG Jun. Gradient-magnetic-field-measurement-based PMEC for Imaging of Metal Subsurface Corrosion[J]. Nondestructive Testing, 2016, 38(4): 10～14
闫贝,李勇,李达,李一力,陈振茂,王钧. 金属亚表面腐蚀缺陷的脉冲调制涡流磁场梯度成像[J]. 无损检测, 2016, 38(4): 10～14
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参考文献
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【2】XIE She-juan, CHEN Zhen-mao, CHEN Hong-en, et al. Evaluation of plastic deformation and characterization of electromagnetic properties using pulsed eddy current testing method［J］. International Journal of Applied Electromagnetics and Mechanics, 2014,45: 755-761.
【3】闫贝,李勇,刘相彪,等. 基于固态磁场传感器的脉冲涡流检测铁磁性构件腐蚀缺陷［J］. 无损检测,2014,36(10):15-18
【4】周德强,张斌强,田贵云,等. 脉冲涡流检测中裂纹的深度定量及分类识别［J］. 仪器仪表学报,2009,30(6): 1190-1194.
【5】TAO R, ZHANG N, WANG Y. Analysing and compensating the effects of range and Doppler frequency migrations in linear frequency modulation pulse compression radar［J］. IET Radar, Sonar & Navigation, 2011,5(1): 12-22.
【6】李英达,肖立志. 一种脉冲重复间隔复杂调制雷达信号分选方法［J］.电子与信息学报,2013,35(10):2493-2497.
【7】BARTUSEK K, GESCHEIDTOVA E, VESELY J. Magnetic resonance technique of gradient magnetic field measurement［C］∥Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Cancun, Meixico:IEEE Operations Center, 2003, 4:3282-3285, 2003.
【8】齐勇, 李勇, 陈振茂,等. 基于磁场梯度信号的脉冲涡流无损检测和定量评估技术［J］. 无损检测, 2011, 34(10):3-45.
【9】LI Yong, QI Yong, CHEN Zhen-mao, et al. Pulsed eddy current testing based on gradient magnetic field measurement［C］∥2012 Sixth International Conference on Electromagnetic Field Problems and Applications. Dalian:IEEE, 2012.
【10】刘相彪,李勇,闫贝,等. 基于脉冲涡流磁场梯度检测的多层金属结构层间腐蚀缺陷成像［J］. 西安理工大学学报,2014,30(4):460-464.
【11】刘相彪,李勇,陈振茂,等. 脉冲远场涡流检测PCA-ICA联合消噪技术［J］. 传感器与微系统,2015,34(1):69-72.
【12】齐勇,刘相彪,李勇,等. 基于磁场梯度测量的脉冲涡流检测关键技术研究［J］. 中国机械工程,2014,25(8):1108-1112,1135.
【13】齐勇,李勇,刘相彪,等. 基于GMFM的脉冲涡流检测亚表面腐蚀缺陷成像技术［J］. 空军工程大学学报(自然科学版),2013,14(5):63-66,94.
【14】吕华,刘明峰,曹江伟,等. 隧道磁电阻(TMR)磁传感器的特性与应用［J］.磁性材料及器件,2012,43(3):1-4,15.
【15】朱目成,周肇飞,贺春光. 精细表面下细小缺陷的磁光涡流成像实时探测［J］. 中国激光,2005,32(6):848-851.
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