Numerical Simulation of Permanent Magnet Method: Applicability to Crack Detection in High-Temperature Superconducting Film
Numerical Simulation of Permanent Magnet Method: Applicability to Crack Detection in High-Temperature Superconducting Film
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永磁法数值模拟：在高温超导薄膜裂纹检测中的应用
DOI：
10.1109/tmag.2014.2360934
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Takayama and A. Saitoh
中科院分区：
文献类型：
--
作者：
A. Kamitani;T. Takayama and A. Saitoh
通过数值模拟，评价了扫描永磁体法在高温超导薄膜裂纹检测中的适用性。利用作用在薄膜上的电磁力来定义缺陷参数，作为裂纹检测的一种手段。在沿各扫描线计算缺陷参数后，用数值方法确定了灵敏度和分辨率。计算结果表明，扫描速度对灵敏度和分辨率的影响不大。另一方面，SPM方法的分辨率远不如归纳法。从这个意义上说，SPM方法是一种高速但低分辨率的裂缝检测方法。
Applicability of the scanning permanent-magnet (SPM) method to crack detection in a high-temperature superconducting film is assessed by means of the numerical simulation. As a measure of crack detection, a defect parameter is defined by using the electromagnetic force acting on the film. After the defect parameter is calculated along various scanning lines, the sensitivity and the resolution are determined numerically. The results of computations show that both the sensitivity and the resolution are hardly affected by the scanning speed. On the other hand, the resolution of the SPM method is much inferior to that of the inductive method. In this sense, the SPM method is a high-speed but low-resolution method for detecting cracks.