| 高速漏磁检测中钢轨磁i化强度的研究 |
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| 引用本文： | 熊龙辉,王平,齐婧,王海涛,旧贵云,高运来.高速漏磁检测中钢轨磁i化强度的研究[J].无损检测,2013(11):2-6,10. |
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| 作者姓名： | 熊龙辉 王平 齐婧 王海涛 旧贵云 高运来 |
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| 作者单位： | [1]南京航空航天大学自动化学院,南京210016 [2]北京青云航空仪表有限公司装配分厂,北京100086 [3]Newcastle大学电子电力与计算机工程学院,英国 |
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| 基金项目： | FP7“NDEandSHMforHealthMonitoringofOff-shorewindFarm（HEMOW）”（FP7-PEOPLE-2010-IRSES）;上海铁路局“高速铁路无缝钢轨温度应力与裂纹检测系统”项目资助. |
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| 摘 要： | 对钢轨裂纹进行高速漏磁巡检时，钢轨的磁化强度直接影响缺陷漏磁场的产生及检测灵敏度。研究了巡检速度、励磁激励和磁轭磁极距被测钢轧的距离（提离）三个因素对钢轨材料磁化强度的影响。通过分析缺陷漏磁检测信号的幅值、检测磁路空气隙处的磁场强度、钢轨材料的磁导率变化得出：巡检速度在2～55m／s范围内时，巡检速度提高，有利于提高高速漏磁裂纹检测的灵敏度；同时，励磁激励电压增加和提离减小都将有利于钢轨材料的磁化强度，从而有利于提高高速漏磁裂纹检测的灵敏度。．
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| 关 键 词： | 磁化强度 磁导率 漏磁检测 钢轨 |
Research on Magnetization of Rail in High-Spee~i Magnetic Flux Leakage Testing |
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| XIONG Long-Hui,WANG Ping,QI Jing,WANG Hai-Tvo,TIAN Gui-Yun＇,GAO Yun-Lai.Research on Magnetization of Rail in High-Spee~i Magnetic Flux Leakage Testing[J].Nondestructive Testing,2013(11):2-6,10. |
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| Authors: | XIONG Long-Hui WANG Ping QI Jing WANG Hai-Tvo TIAN Gui-Yun＇ GAO Yun-Lai |
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| Affiliation: | 1 (1. College of Automation Engineering, Nanjing University of Aeron utics and Astronautics, Nanjing 210016,China; 2. Avie Beijing Keeven Aviation Instrument Co Ltd, Beijing 100086, China; 3. School of Electrical, Electronic and Computer Engineering, University of Newcastle, Newcastle upon Tyne, NE1 7RU, UK) |
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| Abstract: | The detection sensitivity and magnetic flux leakage aIe decided by the magnetization of rail for fast magnetic flux leakage testing. The main work of this thesis is to ma,~e sure how speed of detection, excitation and lift-off shall affect the magnetization of rail. The magnetic field intensity between rail and yoke , amplitude of magnetic flux leakage signals and alteration of rail＇s magnetic p~rmittivity are analyzed, and it is found that increment of speed of detection makes for detection sensitivity when the sl~ed is from 2m/s to 55m/s. Meanwhile, increase of excitation and decrease of lift-off enhance magnetization of rail. which is propitious ta c]otoetlnn ~on~itivitv |
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| Keywords: | Magnetization Magnetic permittivity Magnetic flux leakage testing Rail |
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