【摘 要】
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A driver-pickup probe possesses better sensitivity and flexibility due to individual optimization of a coil.It is frequently observed in an eddy current (EC) ar
【机 构】
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School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221
论文部分内容阅读
A driver-pickup probe possesses better sensitivity and flexibility due to individual optimization of a coil.It is frequently observed in an eddy current (EC) array probe.In this work,a tilted non-coaxial driver-pickup probe above a multilayered conducting plate is analytically modeled with spatial transformation for eddy current nondestructive evaluation.Basically,the core of the formulation is to obtain the projection of magnetic vector potential (MVP) from the driver coil onto the vector along the tilted pickup coil,which is divided into two key steps.The first step is to make a projection of MVP along the pickup coil onto a horizontal plane,and the second one is to build the relationship between the projected MVP and the MVP along the driver coil.Afterwards,an analytical model for the case of a layered plate is established with the reflection and transmission theory of electromagnetic fields.The calculated values from the resulting model indicate good agreement with those from the finite element model (FEM) and experiments,which validates the developed analytical model.
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