有限元在电容层析中的应用研究

Application Research of Finite Element in Electrical Capacitance Tomography

讨论了有限元在电容层析成像中的应用原理和结果，介绍了一套基于１２电极电容传感器进行图像重建的电容层析成像的仿真软件包，该软件包是利用可视化编程语言ＰＶＷＡＶＥ在ＳＧＩ图形工作站上开发的．利用该软件包可以深入分析电容敏感场和流体模型数据的变化，从而为改进图像重建算法和设计最佳电容传感器几何参数提供了有力依据，最后对电容层析成像的特性进行了研究．

This paper discusses the application of the method of finite element in capacitance tomography, and describes an emulation software package for capacitance tomographic image reconstruction which is based on 12 electrode capacitance transducers. It is developed on SGI graphic workstation using visualized programming language PV WAVE. With the help of it, we can study in depth the variations of capacitance sensitivity distributions and fluid model parameters. Hence, it provides powerful methods for improving image reconstruction algorithm and the design of optimal capacitance transducer geometrical parameters. Finally, by using the emulation results, the properties of capacitance tomography are discussed.