Rapid external detection of steel pipe inner wall defects based on motion-induced eddy currents magnetic field
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摘要: 采用ANSYS有限元分析软件探讨了钢质管道内壁缺陷形状、宽度、深度及检测速度与动生涡流场间的关系；设计并搭建了快速外检测试验装置；评价了高速检测条件下，不同缺陷深度所产生的动生涡流信号特征。发现缺陷自身的深宽比越大，缺陷信号的磁感应强度信号越强；随着检测速度提高，动生涡流磁感应强度虽逐渐减小，但仍能精确检出缺陷的位置及参数信息；试验结果与仿真结果具有相同的变化趋势。试验结果表明，基于动生涡流磁场的钢质管道内壁缺陷快速外检测方法能够对管道内壁缺陷进行精准定位与参数辨别，可为管道的快速、精准检测提供理论参考和技术支持。Abstract: The ANSYS finite element analysis software was used to explore the relationship between the shape, width, depth, and detection speed of defects on the inner wall of steel pipelines and the dynamic eddy current field; Designed and built a rapid external detection testing device; Evaluated the characteristics of dynamic eddy current signals generated by different defect depths under high-speed detection conditions. The larger the aspect ratio of the defect itself, the stronger the magnetic induction intensity signal of the defect signal; As the detection speed increases, although the intensity of dynamic eddy current magnetic induction gradually decreases, the location and parameter information of defects can still be accurately detected; The experimental results and simulation results have the same trend of change. The experimental results show that the rapid external detection method for steel pipeline inner wall defects based on dynamic eddy current magnetic field can accurately locate and identify parameters of pipeline inner wall defects, providing theoretical reference and technical support for the rapid and accurate detection of pipelines.
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