The Finite Element Simulation of the Improvement in Remote Field Eddy Current Probe Structure
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摘要: 远场涡流检测是电磁无损检测中的一个重要的研究方向，主要用于铁磁性管道的无损检测。与传统涡流无损检测相比，它有着对管内外壁缺陷灵敏度一致、提离效应小等一系列优点，但由于检测线圈是在远场区，导致探头过长，给实际检测带来了不便，因此，需要对其进行改进，提前远场区，拉近激励和检测线圈的距离。首先叙述了探头改进的一系列方案，然后针对这些方案利用有限元仿真工具ANSYS对其进行了仿真试验，得出了仿真结果，给实际的检测系统试验提供了理论上的指导作用。Abstract: The remote field eddy current is a developing branch of eddy current nondestructive testing. It is mainly used for the nondestructive testing of the ferromagnetic pipe. Compared to the conventional eddy current nondestructive testing, it has the same sensitivity for both the inner and the exterior defect, and has no effect of the lifting off. Because of the detecting coil is on the remote field, the probe is too long, and that caused inconvenient for the actual testing. So the probe needs to be improved, the remote field is made ahead, and the distance is reduced between the exciting coil and the detecting coil. A series of improving schemes were described. For the schemes, some of models were built. By using the finite element simulating software ANSYS, the simulating results of the models were obtained. The results will be useful for improving the remote field eddy current probe.
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Keywords:
- Remote field eddy current /
- Software /
- Finite element simulation /
- Probe
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