| 组合磁化用于增强铁磁材料脉冲涡流检测的灵敏度 |
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| 引用本文： | 雷华明,吉小军,毛义梅.组合磁化用于增强铁磁材料脉冲涡流检测的灵敏度[J].宇航计测技术,2016,36(4):23. |
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| 作者姓名： | 雷华明 吉小军 毛义梅 |
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| 作者单位： | 1、上海交通大学仪器科学与工程系，上海 200240；;
2、上海智能诊疗仪器工程技术研究中心，上海 200240 |
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| 摘 要： | 脉冲涡流检测是近些年涌现出的一种新型无损检测技术。针对铁磁性材料的脉冲涡流检测，本文提出了一种组合磁化的方法。通过附加一个直流磁场对试件磁化，改变材料的磁导率，在加载脉冲激励时，可获得更高的检测灵敏度。理论分析和实验证明了组合磁化对检测灵敏度产生的影响。
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| 关 键 词： | 组合磁化 脉冲涡流 灵敏度 |
Sensitivity Enhancement by Combined Magnetization in the Pulsed Eddy Current Testing for Ferromagnetic Materials |
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| LEI Hua-ming,JI Xiao-jun,MAO Yi-mei.Sensitivity Enhancement by Combined Magnetization in the Pulsed Eddy Current Testing for Ferromagnetic Materials[J].Journal of Astronautic Metrology and Measurement,2016,36(4):23. |
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| Authors: | LEI Hua-ming JI Xiao-jun MAO Yi-mei |
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| Institution: | 1、Department of Instrument Science & Engineering, Shanghai Jiaotong University, Shanghai 200240；;
2、Shanghai Engineering Research Center for Intelligent Diagnosis and Treatment Instrument, Shanghai 200240 |
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| Abstract: | Pulsed eddy current (PEC) testing is a new type of non destructive testing techniques emerging in recent years. For ferromagnetic materials pulsed eddy current testing, a combined magnetization method was presented.A DC magnetic field is added to the specimen to change the magnetic permeability of the material inspected, to achieve higher detection sensitivity when loading pulsed excitation. Theoretical analysis and experimental results show the effect of the combined magnetization on detection sensitivity. |
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| Keywords: | Combined magnetization Pulsed eddy current Sensitivity |
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