【摘要】 电容层析成像传感器的敏感场受多相流介质分布的影响 ,软场特性给图像重建带来很大困难 ,为了提高重建图像质量 ,对敏感场分布进行分析是非常必要的。本文采用有限元法 ,通过对敏感场场域采用两种不同剖分形式的比较 ,提出一种新的场域剖分形式 ,对敏感场分布进行计算机及仿真 ,依据敏感场计算的数据及测量结果 ,提出了基于遗传算法的图像重建算法。实验证明有限元模型是正确的 ,说明利用不等间距的剖分形式可以得到较好的仿真结果 ,重建的图像具有较高的精度更多还原

【Abstract】 Sensor sensitivity field in Electrical Capacitance Tomography is affected by the distribution of multiphase medium that is the peculiarity of soft field, which brings great difficulty for image reconstruction, to improve the quality of image reconstruction, it is important to analyze the distribution of sensitivity field. In this article, using finite element method, comparing the two different plotting patterns to field, then, expound a kind of novel plotting pattern to field, that is computer simulation to the distribution of sensitivity field, from experiments and result of sensitivity field analyze, a novel method of image reconstruction based on Genetic Algorithms is presented, finite element model is right, and simulation result will be fine if adopting unequal interval plotting patterns, at the same time, the result of image reconstruction has high precision.更多还原