Abstract

A procedure has been developed to detect surface defects in the head and foot of a rail using a magnetic method involving thin-film magnetoresistive field sensors. The setup consists of a system for moving the rail in the longitudinal direction, a magnetizing solenoid, cartridges with field sensors for inspecting the rail head and foot, a DC electromagnet with attached pole pieces, and a “robotic” transverse movement unit with an additional cartridge for revealing long-sized defects (over the entire length of the rail). The electrical signals of the sensors are transmitted to an analog-to-digital converter and processed digitally. The possibility of detecting all surface defects stipulated by the regulatory and technical documentation of JSC Russian Railways is demonstrated.

中文翻译：

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关于在轨瑕疵进行过程磁检测的可能性

摘要

已经开发出一种使用涉及薄膜磁阻场传感器的磁性方法检测铁轨头和脚中的表面缺陷的程序。该装置包括一个用于在纵向方向上移动轨道的系统，一个磁化螺线管，带有用于检查轨道头和脚的现场传感器的盒，一个带有磁极片的直流电磁铁以及一个带有附加磁极的“机器人”横向运动单元用于显示大尺寸缺陷（在导轨的整个长度上）的墨盒。传感器的电信号被传输到模数转换器并进行数字处理。证明了检测JSC俄罗斯铁路公司的法规和技术文件规定的所有表面缺陷的可能性。