Huang Linnan, Liao Chunhui, Song Xiaochun, Chen Tao, Zhang Xu, Deng Zhiyang
Hubei Key Laboratory of Modern Manufacturing Quantity Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China.
Sensors (Basel). 2020 Sep 26;20(19):5515. doi: 10.3390/s20195515.
The uneven surface of the weld seam makes eddy current testing more susceptible to the lift-off effect of the probe. Therefore, the defect of carbon steel plate welds has always been a difficult problem in eddy current testing. This study aimed to design a new type of eddy current orthogonal axial probe and establish the finite element simulation model of the probe. The effect of the probe structure, coil turns, and coil size on the detection sensitivity was simulated. Further, a designed orthogonal axial probe was used to conduct a systematic experiment on the weld of carbon steel specimens, and the 0.2 mm width and 1 mm depth of weld defects of carbon steel plates were effectively detected. The experimental results showed that the new orthogonal axial eddy current probe effectively suppressed the unevenness effect of the weld surface on the lift-off effect during the detection process.
焊缝表面的不平整使得涡流检测更容易受到探头提离效应的影响。因此，碳钢板材焊缝缺陷一直是涡流检测中的难题。本研究旨在设计一种新型的涡流正交轴向探头，并建立该探头的有限元仿真模型。模拟了探头结构、线圈匝数和线圈尺寸对检测灵敏度的影响。此外，使用设计的正交轴向探头对碳钢试件焊缝进行了系统实验，有效检测出了碳钢板材焊缝宽度为0.2mm、深度为1mm的缺陷。实验结果表明，新型正交轴向涡流探头在检测过程中有效抑制了焊缝表面不平整对提离效应的影响。
