The invention discloses a steel rail damage detection method and device based on ACFM and MBN signals, which are applied to the field of electromagnetic nondestructive testing, and the method comprises the following steps: respectively acquiring ACFM and MBN detection signals of a steel rail through an ACFM arc probe and an MBN arc probe; establishing a space coordinate system, and converting ACFM and MBN detection signals from curved surfaces into planes; setting the delay display time between the ACFM and MBN detection signals according to the distance between the ACFM and MBN arc-shaped probes and the speed of a walking device bearing the ACFM and MBN arc-shaped probes; fitting the ACFM detection signal into a surface by using a linear interpolation function to form a signal cloud picture, and detecting the rail surface defect of the steel rail; and detecting the surface states of the rail surface plastic deformation layer and the white layer thickness according to the peak-to-peak value, the root-mean-square value and the envelope line of the MBN detection signal. According to the invention, the advantages of two nondestructive testing technologies of ACFM and MBN are combined, and the steel rail damage detection efficiency and accuracy are improved.
本发明公开了基于ACFM和MBN信号的钢轨损伤检测方法及装置,应用于电磁无损检测领域,包括:通过ACFM和MBN弧形探头分别获取钢轨的ACFM和MBN检测信号;建立空间坐标系,将ACFM和MBN检测信号由曲面转换为平面;根据ACFM和MBN弧形探头间的间距以及承载ACFM和MBN弧形探头的走行装置的速度设置ACFM和MBN检测信号间的延迟显示时间;运用线性插值函数对ACFM检测信号拟合成面,形成信号云图,检测钢轨轨面缺陷;根据MBN检测信号的峰峰值、均方根值和包络线检测轨面塑性变形层与白层厚度的表面状态。本发明将ACFM和MBN两种无损检测技术的优势结合,提高了钢轨损伤检测效率与精确性。
Steel rail damage detection method and device based on ACFM and MBN signals
基于ACFM和MBN信号的钢轨损伤检测方法及装置
2023-06-06
Patent
Electronic Resource
Chinese
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