Axial magnetic field sensing for pulsed magnetic flux leakage hairline crack detection and quantification

Chukwunonso K. Okolo, T. Meydan
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引用次数: 8

Abstract

The Magnetic Flux Leakage (MFL) testing method is a well-established branch of electromagnetic non-destructive testing technology extensively used to observe, analyze and estimate the level of imperfections (cracks, corrosions, pits, dents, etc.) affecting the quality of ferromagnetic steel structures. However the conventional MFL (DCMFL) method are not capable of estimating the defect sizes and orientation, hence an additional transducer is required to provide the extra information needed. This paper takes the detection and quantification of tangentially oriented rectangular surface and far-surface hairline cracks as the research objective. It uses an optimized pulsed magnetic flux leakage probe system to establish the location and geometries of such cracks. The results gathered from the approach show that data using the axial (Bx) field component can provide detailed locational information about hairline cracks especially the shape, size and orientation when positioned perpendicular to the applied field.
轴向磁场传感用于脉冲漏磁发际裂纹检测与定量
漏磁检测方法是电磁无损检测技术中一个成熟的分支,广泛用于观察、分析和估计影响铁磁性钢结构质量的缺陷(裂纹、腐蚀、凹坑、凹痕等)的程度。然而,传统的MFL (DCMFL)方法不能估计缺陷的大小和方向,因此需要一个额外的传感器来提供所需的额外信息。本文以切向矩形表面和远表面发际裂纹的检测与定量为研究目标。它采用了一种优化的脉冲漏磁探测系统来确定裂缝的位置和几何形状。从该方法收集的结果表明,使用轴向(Bx)场分量的数据可以提供有关发际裂缝的详细位置信息,特别是垂直于应用场定位时的形状,大小和方向。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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