基于脉冲涡流差分信号提离交汇点的亚表面层材质劣化检测技术理论研究
Evaluation of Subsurface Material Degradation Based on a New Lift-off Intersection Point of Pulsed Eddy Current
摘 要
多层金属结构广泛应用于石油、化工、航天和能源等工业领域的大型、复杂装备中。由于服役工况一般较为恶劣，该结构亚表面层材质性能会出现劣化，直接威胁到大型、复杂装备的安全运转。通过脉冲涡流检测理论仿真，发现了一种基于脉冲涡流差分信号的新型提离交汇点。通过对该交汇点的特性研究，提出了一种能够对多层结构亚表面层材质劣化进行检测和评估的方法。由于当前的脉冲涡流检测技术主要针对金属结构表面层材质劣化进行检测，所以该方法的提出拓展了脉冲涡流检测技术的应用领域。通过数值仿真，所提方法的正确性及实用性得到了验证。
电磁无损检测
脉冲涡流检测
提离交汇点
解析法
Subsurface material degradation
Electromagnetic nondestructive evaluation
Pulsed eddy current
Lift-off intersection point
Analytical modeling
Abstract
Stratified metallic structures are widely used in various industries such as petroleum, chemical, aerospace and energy fields. Subsurface Material Degradation(SMD) occurs within the structures due to rigorous working environment, which influences the operation of crucial components in the large-scale complex apparatus. In this paper, a new Lift-off Intersection Point(LOI) has been discovered via theoretical study of Pulsed Eddy Current technique(PEC). Based on the investigation of the characteristics of the new LOI, a method for evaluation of SMD in stratified metallic structures has been proposed. The method extends the PEC application currently only for evaluation of surface material degradation. Through numerical simulations, the validity and practicability of the proposed method have been investigated.
中图分类号 TH878 TG115.28
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(51007069);中央高校基本科研业务费专项资金资助项目(08142005)
收稿日期 2011/7/31
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备注李勇(1978-)，男，博士，副教授，主要研究方向为结构完整性和装备安全理论与技术。
引用该论文: LI Yong,QI Yong,CHEN Zhen-Mao,LI Hong-Mei. Evaluation of Subsurface Material Degradation Based on a New Lift-off Intersection Point of Pulsed Eddy Current[J]. Nondestructive Testing, 2012, 34(7): 1～5
李勇,齐勇,陈振茂,李红梅. 基于脉冲涡流差分信号提离交汇点的亚表面层材质劣化检测技术理论研究[J]. 无损检测, 2012, 34(7): 1～5
被引情况:
【1】赵 莹,解社娟,张东亮,田明明,吴 磊,李 勇,陈振茂, "脉冲涡流激励信号参数对检测能力的影响",无损检测 38, 14-17(2016)
【2】刘相彪,李勇,陈振茂,齐勇,蔡文路,赵宏达, "基于磁场测量的脉冲远场涡流检测双层套管仿真",无损检测 35, 48-52(2013)
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参考文献
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【16】Li Y, Tian G Y, Ward S. Numerical simulations on Electromagnetic NDT at high speed［J］. Insight, 2006, 48(2): 103-108.
【2】杨宾峰，罗飞路.脉冲涡流检测系统影响因素分析［J］.无损检测,2008,30(2):104-106.
【3】杨宾峰，罗飞路，曹雄恒，等.脉冲涡流腐蚀成像阵列传感器应用研究［J］.传感技术学报,2005,18(1):112-115.
【4】Smith R A, Hugo G R. Transient eddy current NDE for ageing aircraft-capabilities and limitations［J］. Insight,2001,43(1):14-25.
【5】Tian G Y, Sophian A, Taylor D, et al. Pulsed eddy current system for dynamic inspection of defects［J］. Insight,2004,46(5):256-259.
【6】吴鑫，李方奇，石坤，等.脉冲涡流测厚技术理论与应用［J］.北京交通大学学报,2009,33(1):20-23.
【7】徐平，罗飞路.多层金属结构腐蚀缺陷脉冲涡流检测技术研究［J］.自动化仪表,2007,28(11):25-28.
【8】郑岗，刘丁，张震，等.基于提离点的脉冲涡流测厚研究［J］.仪器仪表学报,2008,29(8):1745-1749.
【9】Mandache C, Lefebvre J H V. Transient and harmonic eddy currents: lift-off point of intersection［J］. NDT & E International,2006,39(1):57-60.
【10】Lefebvre J H V, Mandache C. Pulsed eddy current measurement of lift-off［J］. Review of Progress in Quantitative Nondestructive Evaluation,2005,25(1):669-676.
【11】Tian G Y, Li Y, Mandache C. Study of lift-off invariance for pulsed eddy current signals［J］. IEEE Transactions on Magnetics,2009,45(1):184-191.
【12】Li Y, Theodoulidis T P, Tian G Y. Magnetic field-based eddy-current modeling for multilayered specimens［J］. IEEE Transactions on Magnetics,2007,43(11):4010-4015.
【13】Li Y, Tian G Y, Simm A. Fast analytical modelling for pulsed eddy current evaluation［J］. NDT&E International,2008,41(6):477-483.
【14】Li Y, Chen Z M, Qi Y. Generalized analytical expressions of liftoff intersection in PEC and a liftoff-intersection-based fast inverse model［J］. IEEE Transactions on Magnetics,2011,47(10):2931-2934.
【15】Zuo Y B, Chen Z M. Enhancement of sizing capability of ECT for deep cracks by using split TR probes［J］. International Journal of Applied Electromagnetics and Mechanics,2010,33(3):1157-1164.
【16】Li Y, Tian G Y, Ward S. Numerical simulations on Electromagnetic NDT at high speed［J］. Insight, 2006, 48(2): 103-108.
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