基于磁偶极子能级分布的缺陷反演成像

Inverse Imaging for Defects Based on Energy Level of the Magnetic Dipole

在建立离散磁偶极子模型的基础上,通过广义逆矩阵方法求解测量方程的最小二乘极小范数解,取得磁偶极子的影响量分布;通过分析及仿真试验,找出缺陷磁偶极子能级分布的规律,从而对缺陷偶极子进行判定、选择,进而进行成像显示,实现缺陷的断层成像,为缺陷的三维可视化奠定了基础。

The discrete dipole model was firstly established, then the Minimum Norm Least Square Solution (MNLSS) of measurement equation was obtained by solving general inverse matrix, which standed for the distribution of forces of the dipole. By analysis and simulation experiments, the distribution rules of magnetic dipole based on its energy level was found. The section image of the defects was obtained by determining and selecting defect dipoles from the solution, which was the foundation of 3-Dimension visualization for defect imaging. The real test results are agreeable.