Subsurface defect detection for high-speed components based on motional eddy current effect
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摘要: 基于电磁场理论和有限元分析方法,使用Maxwell软件建立含亚表面缺陷的铁磁性和非铁磁性金属构件在直流线圈磁场作用下动生涡流磁场的数值计算模型。通过仿真分别研究了亚表面缺陷深度、构件运动速度以及传感器位置对缺陷信号的影响,并进行了试验验证。Abstract: Based on the electromagnetic field theory and finite element method, this paper aims to use the Maxwell software to establish a numerical calculation model of the motional eddy current magnetic field for ferromagnetic and non-ferromagnetic metal component with subsurface defects. The effects of subsurface defect depth, motion speed, and sensor position on the defect signal are studied through simulation. Followed that, a corresponding rapid detection experiment platform for subsurface defects of high-speed rotating components is built up and an experimental verification is carried out.
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