Modeling and analysis of magnetic dipoles in
weak magnetic field

doi:10.1007/s11465-008-0028-z

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Front. Mech. Eng. ›› 2008, Vol. 3 ›› Issue (2) : 222-225. DOI: 10.1007/s11465-008-0028-z

Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia¹, ZHANG Weimin², LIU Hongguang³

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Abstract

The magnetic leakage field distribution resulting from linear defects of a tube sample in the geomagnetic field is modeled according to the magnetic dipole theory. The formula to compute the normal component of the weak magnetic field is deduced based on the spatial distribution of the magnetic dipole. The shape and characteristics of the zero line (an important criterion for magnetic memory testing) of the normal field is analyzed under different longitudinal magnetizations. Results show that the characteristics of the zero line should be considered when the metal magnetic memory testing method is used to find and locate the defect.

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WANG Zhaoxia, ZHANG Weimin, LIU Hongguang. Modeling and analysis of magnetic dipoles in weak magnetic field. Front. Mech. Eng., 2008, 3(2): 222‒225 https://doi.org/10.1007/s11465-008-0028-z

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