Detection and Identification of Oblique Angles of Rail Cracks by 3D Magnetic Flux Leakage
- 作者：Ping WangLongHui XiongSa ZhaoGuiYun TianChao Yuan
- 会议时间：2013-06-01
- 关键词：inclined cracks ; 3d magnetic flux leakage ; finite element ; sensor array
- 作者单位：Ping Wang,LongHui Xiong,Sa Zhao,Chao Yuan(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)GuiYun Tian(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;School of Electrical and Electronic Engineering, Newcastle University, NE1 7RU,_UK)
- 母体文献：2013远东无损检测新技术论坛论文集
- 会议名称：2013远东无损检测新技术论坛
- 会议地点：济南
- 主办单位：江苏省机械工程学会
- 语种：chi
摘要
The inclined cracks that have any angles to the rail trends are the major damage mode of the rail surface for high-speed railway.It is important to enhance rapid and accurate detection and identification.Compared with ultrasonic testing, 3D magnetic flux leakage (MFL) allows fast and non-contact detection.This paper firstly investigates the major damage modes and features of the high-speed railway rail surface, and probes into the current detection means and their merits and faults.The 3D MFL of these inclined cracks with different depth, width and tilt angle are simulated and tested, the peak value of Bx of leakage field (BxH) and the peak value of By of leakage field (ByH) are obtained.So angles θ of cracks are calculated by the parameter arctan(BxH/ByH) to identify the angle between the inclined cracks and rail trends, which is a necessary step for the feature measurement such as the depth and width of oblique cracks.Eventually, measurement errors are analyzed.