磁感应成像中三维涡流前期模型仿真  

Simulation of Forward Problem for 3D Eddy Current in Magnetic Induction Tomography

作　　者：王旭[1] 吕轶[1,2] 陈玉艳[1] 金晶晶[1] 杨丹[1] 

机构地区：[1]东北大学信息科学与工程学院,沈阳110819 [2]辽东学院信息技术学院,丹东118002

出　　处：《系统仿真学报》2012年第4期780-783,788,共5页Journal of System Simulation

基　　金：国家自然科学基金(50477015)

摘　　要：磁感应成像(MIT)中正问题的仿真是影响MIT技术发展的关键性问题之一,而导体内部三维涡流问题又制约着MIT中的正问题的研究。基于正问题的数学模型,提出一种MIT三维测量模型,利用有限元方法进行求解,仿真获得导体中不同面的三维涡流的磁通密度分布并进行对比,得出受激励线圈影响导体内部三维涡流磁通密度的变化规律,为研究MIT中的正问题及图像重建提供重要依据。Simulation of forward problem for 3D eddy current in magnetic induction tomography is one of the key issues in development of the technology of MIT.3D eddy current problem of conductor interior restricts further research for the forward problem of MIT.A new 3D measurement model which was solved with finite element method was proposed based on the mathematical model of forward problem.It was simulated to obtain magnetic flux density for 3D conductor with different surface eddy current distribution and make the results be compared,conclude regularity for change of 3D eddy current magnetic flux density influenced by excitation coils.The results provide important basis for forward problem and imaging reconstruction of MIT.

关 键 词：磁感应成像 涡流 有限元 磁通密度 激励线圈 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]