多电极电磁流量计权重函数的仿真研究  

Simulation Research on Weight Function of Multi-electrode Electromagnetic Flowmeter

作　　者：孔令富[1] 杜胜雪[1] 李英伟[1] 

机构地区：[1]燕山大学信息科学与工程学院

出　　处：《计量学报》2015年第1期58-62,共5页Acta Metrologica Sinica

基　　金：国家科技重大专项(2011ZX05020-006);河北省自然科学基金(F2014203265);高等学校博士学科点专项科研基金(20131333110015)

摘　　要：采用有限元方法，针对三对电极电磁流量计电极在不同位置时权重函数分布情况进行数值仿真。提出2个描述权重函数分布均匀度的指标：最大偏差和整体均匀度，并在电极数目和位置不同情况下对权重函数的分布情况进行分析比较。结果表明，电磁流量计权重函数分布不仅与电极数目有关，还与电极所在的位置有关。通过合理设计电极位置，三对电极电磁流量计在权重函数分布均匀度和平均强度两方面都优于单电极对电磁流量计。Adopting the finite element method, when the electrodes are in different positions, the numerical simulations for weight function of electromagnetic flow meter with six electrodes are carried on. Then two indexes indicating the evenness of weight function have been put forward： the maximum deviation and the overall evenness, and the distributions of weight function while the number of electrodes are different and the electrodes are in different locations are analyzed based on these indexes. The results show that weight function distribution of electromagnetic flow meter is related not only with the number of electrodes but also with position of electrodes. By reasonable designing the position of electrodes, the electromagnetic flowmeter with six electrodes is superior to dual-electrode electromagnetic flowmeter in both of the uniformity and the average strength of weighting function distribution.

关 键 词：计量学 多电极电磁流量计 权重函数 有限元方法 数值仿真 

分 类 号：TB937[一般工业技术—计量学]