宇航计测技术

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组合磁化用于增强铁磁材料脉冲涡流检测的灵敏度

雷华明1;吉小军1;毛义梅1   

  1. 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
  • 出版日期:2016-08-15 发布日期:2016-08-15
  • 作者简介:雷华明(1976-),男,博士,讲师,主要研究方向:无损检测新技术与智能系统、特种环境测试技术等。

Sensitivity Enhancement by Combined Magnetization in the Pulsed Eddy Current Testing for Ferromagnetic Materials

LEI Hua-ming1;JI Xiao-jun1;MAO Yi-mei1   

  1. 1、Department of Instrument Science & Engineering, Shanghai Jiaotong University, Shanghai 200240;
    2、Shanghai Engineering Research Center for Intelligent Diagnosis and Treatment Instrument, Shanghai 200240
  • Online:2016-08-15 Published:2016-08-15

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。

关键词: 组合磁化, 脉冲涡流, 灵敏度

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.

Key words: Combined magnetization, Pulsed eddy current, Sensitivity