基于二元模型的电阻抗成像方法  

Electrical impedance imaging method based on dual models

作　　者：刘晓龙[1] 严佩敏[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200444

出　　处：《电子测量技术》2016年第7期58-61,共4页Electronic Measurement Technology

摘　　要：建立了一种双模型电阻抗成像系统,旨在解决一元模型电阻抗成像系统中耗时较多的问题。基于精细化三维圆柱体模型进行电阻抗正问题分析,采用粗梳三维圆柱体模型进行逆问题求解。在双模型成像系统中,基于稀疏矩阵建立映射公式实现粗疏有限元单元和精细有限元单元的匹配和转换。通过计算机仿真,在该系统中运用基于修正的Laplace Guass-Newton重建算法可以得到相应的阻抗重建图像,实验结果验证了双模型系统的正确性和可行性。In this paper ,the author put forward a double model to solve the method of electrical impedance imaging system .In the treatment of the forward problem ,provides a fine cylinder model;In the treatment of the inverse problem ,provides a relatively rough 3‐d model of cylinder .The two models is through the corresponding mapping formula for finite element unit and deficient detailed finite element unit conversion .To find the mapping system model transformation ,this paper puts forward the dual model is established by sparse matrix P which is the mapping relationship .Finally using the reconstruction algorithm of electrical impedance imaging , proves the double model system .Through the computer simulation and using modified Laplace Guass‐Newton reconstruction algorithm can get impedance reconstruction images clearly .

关 键 词：三维阻抗成像 二元模型 正问题 逆问题 

分 类 号：TP806.1[自动化与计算机技术—检测技术与自动化装置]