| 交变磁场测量数学模型及类匀强场的建立 |
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| 引用本文： | 康中尉,罗飞路,胡媛媛,曹雄恒.交变磁场测量数学模型及类匀强场的建立[J].无损检测,2004,26(11):545-551. |
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| 作者姓名： | 康中尉 罗飞路 胡媛媛 曹雄恒 |
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| 作者单位： | 国防科技大学机电工程与自动化学院,长沙,410073 |
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| 摘 要： | 在介绍了交变磁场测量原理的基础上，分析并给出了交变磁场测量法的数学和理论模型，对缺陷模型进行了详尽的分析。为了实现交变磁场测量法，提出了类匀强场的概念并对其进行了论证。分析了用复合矩形激励线圈产生类匀强场的方法和理论基础。最后通过ANSYS有限元仿真技术对在该复合线圈激励下，工件表层感应电场及其相位，以及工件周围感应磁场进行了分析，验证了试验模型的正确性。
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| 关 键 词： | 无损检测 交变磁场测量法 有限元数值仿真 缺陷 定量 |
| 文章编号： | 1000-6656(2004)11-0545-06 |
| 修稿时间： | 2003年9月15日 |
THE MATHEMATICAL MODELLING OF ALTERNATING CURRENT FIELD MEASUREMENT AND THE ESTABLISHMENT OF APPROXIMATELY UNIFORM FIELD |
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| KANG Zhong-wei,LUO Fei-lu,HU Yuan-yuan,CAO Xiong-hen.THE MATHEMATICAL MODELLING OF ALTERNATING CURRENT FIELD MEASUREMENT AND THE ESTABLISHMENT OF APPROXIMATELY UNIFORM FIELD[J].Nondestructive Testing,2004,26(11):545-551. |
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| Authors: | KANG Zhong-wei LUO Fei-lu HU Yuan-yuan CAO Xiong-hen |
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| Abstract: | On the introduce of alternative current field measurement(ACFM), the mathematic and theoretical model of ACFM were analyzed, and especially the flaw model at large. In order to realize the measurement, the concept and theoretical foundation of the approximately uniform filed was proposed and the feasibility of using a rectangular coil to induce the approximately uniform field in the skin of the work-pieces was analyzed. The experimental model was proved by the method of finite element numerical simulation, which analyzed the magnetic filed around the work-piece, the induced current and its phase-lag in the skin. |
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| Keywords: | Nondestructive testing Alternating current field measurement Finite element numerical simulation Defect Quantitative |
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