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이진이(Jiuyi Lee),이세훈(Sehoon Lee),황지성(Jiseong Hwang),전종우(Jongwoo Jun) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
This paper reports a development of numerical analysis software, which could analyze magnetic field around cracks by using an improved dipole model. The preprocessor includes crack forming software, and the magnetic charge per unit area, m could be distributed on the crack section area. Also lift-off, measurement area and sensor interval, magnetization direction could be considered in the preprocessor. Also, postprocessor provides the results presenting functions, such as natural magnetic field distribution and ∂B/∂x, ∂B/∂y. Also, the physical characteristics of magnetic optical sensor and Hall sensor are included in the postprocessor, and the magnetic field distribution could be changed optical intensity and electrical signal distribution. The experiment results, which are obtained by using magnetic camera and the magnetic optical nondestructive inspection system on the crack, are compared with analysis results by using dipole model analysis software.