| 漏磁检测的交直流磁化问题 |
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| 引用本文： | 李路明,黄松岭,施克仁.漏磁检测的交直流磁化问题[J].清华大学学报(自然科学版),2002,42(2):154-156. |
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| 作者姓名： | 李路明 黄松岭 施克仁 |
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| 作者单位： | 清华大学,机械工程系,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目 ( 5 0 0 0 10 0 6 ) |
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| 摘 要： | 针对漏磁检测交流磁化的磁化电流频率选择问题 ,采用概率论的有关知识分析了影响漏磁检测信号大小的因素 ,并从漏磁场的检测理论上分析了磁化频率的选取原则 ,即 :载波频率应远大于调制波频率。对宽 0 .2 mm、深0 .2 m m的人工矩形槽缺陷的检测结果验证了对缺陷漏磁场所作的理论分析 ,得出了在常规的漏磁检测条件下磁化频率应大于 1k Hz,并指出漏磁检测不能采用频率为 5 0 Hz交流电磁化
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| 关 键 词： | 漏磁检测 磁化 频率 |
| 文章编号： | 1000-0054(2002)02-0154-03 |
| 修稿时间： | 2000年9月25日 |
AC and DC magnetizing for magnetic flux leakage testing |
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| LI Luming,HUANG Songling,SHI Keren.AC and DC magnetizing for magnetic flux leakage testing[J].Journal of Tsinghua University(Science and Technology),2002,42(2):154-156. |
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| Authors: | LI Luming HUANG Songling SHI Keren |
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| Abstract: | Rules for selecting the magnetizing frequency for magnetic flux leakage testing (MFL) are discussed from MFL testing theory using probability theory. The frequency of the carrier wave should be much higher than that of the modulated wave. Experimental data collected from a 0.2 mm wide by 0.2 mm deep default verified the analysis. The data also showed that the magnetizing frequency should be higher than 1 kHz for typical inspecting conditions and that the 50 Hz AC magnetizing method was unfit for MFL. |
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| Keywords: | magnetic flux leakage testing magnetizing frequency |
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