Fast analytical modelling for pulsed eddy current evaluation
Fast analytical modelling for pulsed eddy current evaluation
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DOI：
10.1016/j.ndteint.2008.02.001
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发表时间：
2008-09-01
影响因子：
4.2
通讯作者：
Simm, Anthony
中科院分区：
文献类型：
--
作者：
Li, Yong;Tian, Gul Yun;Simm, Anthony
电磁无损评估（ENDE）的数值模拟与提供快速封闭解的解析方法相比，耗时较长。本文将截断区特征函数展开（Truncated Region Eigenfunction展开，TREE）模型扩展到解决传统多频涡流的脉冲涡流（pulsed eddy current， PEC）评估问题。利用傅里叶变换使树在时域和频域上都适用于求解PEC问题。此外，由于PEC使用磁场传感器/阵列来量化磁场，因此使用扩展的TREE对固态磁场传感器的磁场信号进行了模拟。结果表明，扩展TREE预测的信号与实验结果吻合较好。因此，所建立的模型不仅可以在更快的模拟时间和更高的计算精度方面提供有效的解决方案，而且可以用于工业上的PEC评估以及在实时监测中探索分层导电试件的结构和电气信息的逆向过程。(C) 2008 Elsevier Ltd版权所有。
Numerical simulations of electromagnetic non-destructive evaluation (ENDE) can be time-consuming in comparison to analytical methods which provide fast closed-form solutions to the ENDE problems. In this paper, the Truncated Region Eigenfunction Expansion (TREE) modelling is extended to solve problems of pulsed eddy current (PEC) evaluation from the traditional multifrequency eddy current. The Fourier transform is employed to make the TREE feasible for solutions to PEC problems in both time and frequency domains. Moreover, because PEC employs magnetic field sensors/arrays to quantify magnetic field, the magnetic field signals from solid-state magnetic field sensors have been simulated using the extended TREE. It has been found that the predicted signals using the extended TREE has good agreement with the experimental results. Consequently, the established model can not only offer an effective solution in terms of faster simulation time and higher computational accuracy, but also be used for PEC evaluation in industry and in the inverse process for exploring the structural and electrical information of stratified conductive specimens during real-time monitoring. (C) 2008 Elsevier Ltd. All rights reserved.