| 快速识别金属材料缺陷的一种新方法 |
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| 引用本文： | 幸玲玲,席保锋,盛剑霓.快速识别金属材料缺陷的一种新方法[J].电子学报,2000,28(8):16-19. |
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| 作者姓名： | 幸玲玲 席保锋 盛剑霓 |
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| 作者单位： | 1. 中国科学技术大学电子工程与信息科学系,安徽 230026;2. 西安交通大学电气工程学院,西安 710049 |
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| 基金项目： | 国家教委博士点基金!(No.) |
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| 摘 要： | 本文提出一种快速识别金属材料中缺陷的位置、形状和大小的新方法.该方法用位于分界面上的多个等效线圈产生的场等效逼近因缺陷存在引起的扰动场,使逆问题的求解中每次需用数值方法求解正问题的过程转变为每次用解析法求解正问题.缺陷的重构速度比用体积分方程法提高十倍以上.直线裂缝和十字型裂缝的重构计算证明本文方法是正确的和快速有效的.
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| 关 键 词： | 缺陷识别 等效线圈 最小二乘法 小波变换 |
| 收稿时间： | 1999-05-10 |
A New Approach for Fast Identification of Flaw in Metallic Material |
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| XING Ling-ling,XI Bao-feng,SHENG Jian-ni.A New Approach for Fast Identification of Flaw in Metallic Material[J].Acta Electronica Sinica,2000,28(8):16-19. |
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| Authors: | XING Ling-ling XI Bao-feng SHENG Jian-ni |
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| Institution: | 1. Doctor P.O.Box 612;2. Dept of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China |
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| Abstract: | A new approach to identify flaw position,size and shape is proposed in metallic materials.In the method,the perturbed magnetic field due to a flaw (crack) is approximated by the magnetic field produced by equivalent coils located at the conductor/air interface.This made it possible for the forward problems in inverse problems to be solved by analytical method instead of numerical methods.The new method is over ten times more rapid than the volumetric integral equation method.The reconstruction computations of a straight and a cross cracks have demonstrated that the new method is correct, efficient and rapid. |
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| Keywords: | flaw identification equivalent coil least squares method wavelet transform |
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