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基于暂态磁场梯度信号的脉冲涡流无损检测和定量评估技术

齐勇, 李勇, 陈振茂, 肖美华

齐勇, 李勇, 陈振茂, 肖美华. 基于暂态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, 2012, 34(10): 3-7.
引用本文: 齐勇, 李勇, 陈振茂, 肖美华. 基于暂态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, 2012, 34(10): 3-7.
QI Yong, LI Yong, CHEN Zhen-Mao, XIAO Mei-Hua. Research on Pulsed Eddy Current Testing Using Measurement of Transient Gradient Magnetic Field[J]. Nondestructive Testing, 2012, 34(10): 3-7.
Citation: QI Yong, LI Yong, CHEN Zhen-Mao, XIAO Mei-Hua. Research on Pulsed Eddy Current Testing Using Measurement of Transient Gradient Magnetic Field[J]. Nondestructive Testing, 2012, 34(10): 3-7.

基于暂态磁场梯度信号的脉冲涡流无损检测和定量评估技术

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(0106-08142005,0106-08143021)

详细信息
    作者简介:

    齐勇(1983-),男,助理工程师,硕士研究生。主要研究方向为电磁无损检测理论和实验。

  • 中图分类号: TG115.28

Research on Pulsed Eddy Current Testing Using Measurement of Transient Gradient Magnetic Field

  • 摘要: 脉冲涡流检测技术是目前对多层金属结构实施有效检测和定量评估的无损检测方法之一。传统脉冲涡流检测技术基于电磁感应原理,采用感应线圈或磁场传感器采集暂态磁场信号,以实现对多层金属结构内部缺陷的定位、识别以及量化评估。文章提出一种新型脉冲涡流检测技术,该技术主要基于已在核磁共振成像(MRI)领域得到应用的磁场梯度测量技术,将磁场梯度信号测量与脉冲涡流检测相结合,以实现对多层金属结构脉冲涡流检测灵敏度的提高。基于ETREE解析法,建立了所提方法的理论模型,推导了脉冲涡流检测磁场梯度信号理论表达式。通过仿真和试验,证明了该方法在多层金属结构亚表面材质劣化检测中的优势。
    Abstract: Pulsed Eddy Current Testing(PECT) is an effective Electromagnetic Nondestructive Evaluation(ENDE) technique for quantitative evaluation regarding the integrity of multi-layer conductors. Conventional PECT utilizes induction coils and solid-state magnetic field sensors which give the transient signals of net magnetic field for defect detection, classification and characterization. In this paper, we introduce Gradient Magnetic Field Measurement(GMFM), which has been intensively used in Magnetic Resonance Imaging(MRI), to PECT in an effort to improve the PECT sensitivity to multi-layer conductors. The closed-form expressions of GMFM-based PECT signals have been formulated via the Extended Truncated Region Eigenfunction Expression(ETREE) modeling. Through theoretical and experimental investigation, it is found that the proposed GMFM-based PECT is significantly advantageous over traditional PECT in terms of high detection-and-evaluation sensitivity to subsurface material degradation of multi-layer conductors.
  • [1] 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.
    [2] 张思全,陈铁群,朱佳震.脉冲涡流检测技术的进展[J].无损检测,2008,30(11):838-864.
    [3] 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.
    [4] Li Y, Tian G Y, Simm A. Fast analytical modelling for pulsed eddy current evaluation[J]. NDT&E International,2008,41(6):477-483.
    [5] Tian G Y, Sophian A. Defect classification using a new feature for pulsed eddy current sensors[J]. NDT&E International,2005,38(1):77-82.
    [6] Harrell J W. Effect of AC gradient field on magnetic measurements with an alternating gradient magnetometer[J]. Journal of Magnetism and Magnetic Materials,1999,205(1):121-129.
    [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, Mexico,2003:3282-3285.
    [8] Li Y, Theodoulidis T, Tian G Y. Magnetic field-based eddy-current modeling for multilayered specimens[J]. IEEE Transactions on Magnetics,2007,43(11):4010.
    [9] 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.
    [10] 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.
    [11] Zuo Y, 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.
    [12] Abidin I Z, Li Y, Latif N A, et al. Advantages and applications of pulsed eddy current testing for comprehensive and reliable defect assessment[J]. NDT SPECTRA,2011(5):227-233.
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出版历程
  • 收稿日期:  2012-05-21
  • 刊出日期:  2012-10-09

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