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Analysis of a Nondestructive Evaluation Technique for Defect Characterization in Magnetic Materials Using Local Magnetic Measurements

机译：使用局部磁测量的磁性材料缺陷表征的非破坏性评估技术分析

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摘要

We study a method for nondestructive testing of laminated strips of a nonlinear magnetic material. Based on local measurements of the magnetic induction at the surface, we are able to reconstruct the proper position of defects inside the material, by solving an inverse problem. This inverse problem is solved by minimizing a suitable cost function using a gradient-based optimization procedure. Calculation of the gradient is done either by the standard method of small perturbations or by solving the sensitivity equation. The latter method yields a significant reduction of the computational time. The validity of the proposed algorithm is confirmed by experimental results.
机译：我们研究了一种用于非线性磁性材料叠片的无损检测方法。基于表面磁感应强度的局部测量，我们能够通过解决反问题来重建材料内部缺陷的正确位置。通过使用基于梯度的优化过程使合适的成本函数最小化，可以解决此反问题。可以通过标准的小扰动方法或通过求解灵敏度方程来完成梯度的计算。后一种方法显着减少了计算时间。实验结果证明了该算法的有效性。

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  • 来源
    《Mathematical Problems in Engineering》 |2010年第3期|p.21-38|共18页
  • 作者

    Stephane Durand; Ivan Cimrák; Peter Sergeant; Ahmed Abdallh;

  • 作者单位

    Department of Mathematical Analysis, Ghent University, Galglaan 2,9000 Ghent, Belgium;

    Department of Mathematical Analysis, Ghent University, Galglaan 2,9000 Ghent, Belgium;

    Department of Electrotechnology, Faculty of Applied Engineering Sciences, University College Ghent,Schoonmeersstraat 52,9000 Ghent, Belgium,Department of Electrical Energy, Systems and Automation, Ghent University, Sint-Pietersnieuwstraat 41,9000 Ghent, Belgium;

    Department of Electrical Energy, Systems and Automation, Ghent University, Sint-Pietersnieuwstraat 41,9000 Ghent, Belgium;

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