一种钢轨表面伤损漏磁检测信号滤波方法  

A Filtering Method for MFL Detection Signal of Rail Surface Damage

作　　者：周黄健 贾银亮[1] 王平[1] ZHOU Huangjian;JIA Yinliang;WANG Ping(Colloge of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学自动化学院,江苏南京211100

出　　处：《测控技术》2023年第5期73-78,共6页Measurement & Control Technology

基　　金：科技部重大科学仪器设备开发专项(2016YFF0103702);国家自然科学基金重大科学仪器开发专项(61527803)。

摘　　要：漏磁检测(MFL)是工程上常用的无损检测方法之一,针对钢轨顶面伤损漏磁检测信号受提离干扰的影响,根据伤损漏磁场在不同方向上的分布特征,提出了一种抑制钢轨漏磁检测提离干扰的滤波方法。采用阵列式传感器,根据x和z方向信号的差值确定参考信号实现滤波,根据伤损漏磁场的分布推导了传感器的安装方式。实验结果表明,该方法能够有效地抑制漏磁信号的提离干扰,显著地改善了漏磁检测信号。Magnetic flux leakage(MFL)testing is one of the commonly used nondestructive testing methods in engineering.Aiming at the influence of lifting interference on the MFL testing signal of rail top damage,accord⁃ing to the distribution characteristics of MFL field in different directions,a filtering method to suppress the lift⁃off interference of rail MFL testing is proposed.The array sensor is used to determine the reference signal ac⁃cording to the difference betweenxandzdirection signals to realize filtering.The installation mode of the sen⁃sor is deduced according to the distribution of damage leakage magnetic field.The experimental results show that this method can effectively suppress the lifting interference of MFL signal and significantly improve the MFL detection signal.

关 键 词：漏磁检测 钢轨伤损 提离干扰 阵列传感器 

分 类 号：TG115.28[金属学及工艺—物理冶金]