【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。更多还原

【Abstract】 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.更多还原