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20 February 2006 Nondestructive evaluation using dipole model analysis with a scan type magnetic camera
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Proceedings Volume 6041, ICMIT 2005: Information Systems and Signal Processing; 60412S (2006) https://doi.org/10.1117/12.664477
Event: ICMIT 2005: Merchatronics, MEMS, and Smart Materials, 2005, Chongqing, China
Abstract
Large structures such as nuclear power, thermal power, chemical and petroleum refining plants are drawing interest with regard to the economic aspect of extending component life in respect to the poor environment created by high pressure, high temperature, and fatigue, securing safety from corrosion and exceeding their designated life span. Therefore, technology that accurately calculates and predicts degradation and defects of aging materials is extremely important. Among different methods available, nondestructive testing using magnetic methods is effective in predicting and evaluating defects on the surface of or surrounding ferromagnetic structures. It is important to estimate the distribution of magnetic field intensity for applicable magnetic methods relating to industrial nondestructive evaluation. A magnetic camera provides distribution of a quantitative magnetic field with a homogeneous lift-off and spatial resolution. It is possible to interpret the distribution of magnetic field when the dipole model was introduced. This study proposed an algorithm for nondestructive evaluation using dipole model analysis with a scan type magnetic camera. The numerical and experimental considerations of the quantitative evaluation of several sizes and shapes of cracks using magnetic field images of the magnetic camera were examined.
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Jinyi Lee and Jiseong Hwang "Nondestructive evaluation using dipole model analysis with a scan type magnetic camera", Proc. SPIE 6041, ICMIT 2005: Information Systems and Signal Processing, 60412S (20 February 2006); https://doi.org/10.1117/12.664477
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