Magnetic-Field-Based 3D ETREE Modelling for Multi-Frequency Eddy Current Inspection
More and more solid-state magnetic field sensors such as Hall de-vices are used in eddy current inspection (EC) to acquire magnetic field signals. This work extends the previous analytical model, i.e. 2D Extended Truncated Region Eigenfunction Expansion (ETREE) of EC, and focuses on establishment of 3D ETREE of multi-frequency eddy current inspection (MFEC) on stratified conductors, while taking into account the solid-state magnetic field sensors for field quantification and rectangular coils for field excitation. 3D Finite Element Modelling (FEM) and a hybrid modelling are adopted for verification of the es-tablished model. It has been noticed that the 3D ETREE implements the fast and accurate computation of magnetic field signals of MFEC. Following that, the directional characteristics of EC with rectangular excitation coils are inves-tigated, which reveals that the coil width contributes more to the measurement sensitivity than the coil length, and benefits the evaluation of defects and anisot-ropic conductivity profile of conductors in the follow-up study.
Eddy current inspection Magnetic field Extended Truncated Re-gion Eigenfunction Expansion Finite element modelling.
Yu Zhang Yong Li
Engineering College, Air Force Engineering University,ShaanXi, Xian, 710038, P.R. China School of Aerospace, Xian Jiaotong University,ShaanXi, Xian, 710049, P.R. China
国际会议
南昌
英文
221-230
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）