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Sizing of 3-D Arbitrary Defects Using Magnetic Flux Leakage Measurements

机译:使用磁通量泄漏测量确定3D任意缺陷的大小

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摘要

In this paper, we propose a new procedure to estimate the shape of the opening and the depth profile of an arbitrary three-dimensional (3-D) defect from magnetic flux leakage (MFL) measurements. We first use the Canny edge detection algorithm to estimate the shape of the defect opening. Then we use an inversion procedure based on the space mapping (SM) methodology in order to approximate the defect depth profile efficiently. To demonstrate the accuracy of the proposed inversion technique, we reconstruct defects of arbitrary shapes from simulated MFL signals. The procedure is then tested with experimental data of two metal-loss defects. In both cases, the proposed approach shows good agreement between the actual and estimated defect parameters.
机译:在本文中,我们提出了一种新的程序,可以根据漏磁(MFL)测量来估计任意三维(3-D)缺陷的开口形状和深度轮廓。我们首先使用Canny边缘检测算法来估计缺陷开口的形状。然后,我们使用基于空间映射(SM)方法的反演程序,以便有效地近似缺陷深度轮廓。为了证明所提出的反演技术的准确性,我们从模拟的MFL信号中重建了任意形状的缺陷。然后用两个金属损失缺陷的实验数据测试该程序。在这两种情况下,所提出的方法在实际和估计的缺陷参数之间均显示出良好的一致性。

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