摘要
电阻层析成像系统敏感场受多相流介质分布的影响,敏感场分布数据作为图像重建所需的先验数据必须通过理论计算的方法得到,为降低敏感场的软场误差,提高重建图像质量,对敏感场分布进行深入的分析是极为必要的。论文在分析电阻层析成像的基本原理的基础上,采用有限元的方法建立了敏感场的数学模型,通过对离散介质场域的研究,分析了影响敏感场分布的因素及规律,完成了敏感场分布计算及可视化仿真。实验证明建立的有限元模型是正确的,而且敏感场分布符合实际,运算速度在10s左右,为相关的图像重建算法提供了依据。
Sensitivity field in electrical resistance tomography system is affected by the distribution of multiphase medium,and the data of sensitivity distribution which are obtained by theoretical calculation can be used as prior experimental knowledge for image reconstruction,so it is necessary to analyze the distribution of the sensitivity field to decrease error of soft field and improve the quality of the image reconstruction.In this paper at the basis of analyzing the principle of electrical resistance tomography system,the mathematical model of sensitivity field is built by utilizing finite element method.Through study field with disperse phase,the factors affecting the distribution of the sensitivity field and rules are analyzed,the calculation of sensitivity distribution and visualized simulation are achieved.The experiments show that the finite element model is right,the sensitivity field proposed is in accordance with the practice and the computation velocity is about 10 seconds,which provides the basis for related image reconstruction algorithms.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第9期53-55,68,共4页
Computer Engineering and Applications
基金
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60572153)
国家教育部重点科技项目(No.204043)
黑龙江省骨干教师创新计划项目(No.1054G014)。
关键词
电阻层析成像
敏感场
流型
计算机仿真
electrical resistance tomography
sensitivity field
flow regime
computer simulation
