The invention discloses a steel rail magnetic flux leakage detection device based on zero lift-off rolling magnetization. The device comprises a magnetizing coil used for generating an excitation magnetic field, a U-shaped magnet yoke used for forming a magnetizing loop, a profiling rolling magnetizing wheel in direct contact with a steel rail, a magnetic flux leakage detection sensor array used for being installed on a probe mechanism, and a grating encoder used for defect position positioning. The U-shaped magnet yoke, the detected steel rail and the profiling rolling magnetizing wheel forma magnetizing loop. As the profiling rolling magnetization wheel is in direct contact with the steel rail, the magnetic resistance of a magnetization loop can be reduced, the magnetization intensity of the detected steel rail is enhanced and the magnetization depth is increased. Full-coverage magnetization of the upper surface and the side face of the rail head of the steel rail is achieved, magnetic flux leakage detection of the surface and the near surface of the rail head can be finally achieved, and the characteristics of high magnetization capacity and high detection reliability are achieved.
本发明公开了一种基于零提离滚动磁化的钢轨漏磁检测装置,该装置包括:用于产生激励磁场的磁化线圈、用于形成磁化回路的U型磁轭、与钢轨直接接触的仿形滚动磁化轮、用于安装在探头机构上的漏磁检测传感器阵列、以及用于缺陷位置定位的光栅编码器。U型磁轭、被检钢轨、仿形滚动磁化轮三者形成磁化回路。由于仿形滚动磁化轮与钢轨直接接触,可降低磁化回路磁阻,增强被检钢轨磁化强度,提高磁化深度。实现钢轨轨头上表面和轨头侧面的全覆盖磁化,最终可实现轨头表面及近表面的漏磁检测,具有磁化能力强、检测可靠性高等特点。
Steel rail magnetic flux leakage detection device based on zero lift-off rolling magnetization
一种基于零提离滚动磁化的钢轨漏磁检测装置
2020-10-13
Patent
Electronic Resource
Chinese
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