多电极电磁流量计用于非轴对称流的测量  

Measuring Non-Axisymmetric Flow by Multielectrode Electromagnetic Flow Meter

作　　者：赵宇洋[1] 张涛[1] Lucas G 

机构地区：[1]天津大学天津市过程检测与控制重点实验室,天津300072 [2]英国哈德斯菲尔德大学

出　　处：《天津大学学报（自然科学与工程技术版）》2013年第6期559-564,共6页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金青年科学基金资助项目(61101227)

摘　　要：为解决两电极电磁流量计对于速度非轴对称分布的敏感问题,基于Shercliff权函数提出区域权函数概念,研究其计算方法并设计出多电极电磁流量计.通过多电极传感器测量不同位置的弦端电压,计算管道截面各区域的局部轴向平均速度,并实现体积流量的测量.介绍了多电极电磁流量计传感器设计,通过测量偏流发生器下游的非轴对称单相流及倾斜管固-液两相流,证明该设计对于非轴对称流具有较高的流量测量精度及可靠的速度分布测量结果.A multi-electrode electromagnetic flow meter （MEFM） based on region weight function, which is derived from Shercliff weight function theory, has been developed and presented in this paper. The novel flow meter uses the region weigh function theory to reconstruct the local mean velocities of measurement cross-section and flow rate by acquiring the induced voltages at the boundary along flow pipe circumference and images the velocity profile in real time. This paper describes the design of MEFM. The experiments on non-axisymmetric single conductive flow which is generated by a flow conditioner and soil-water flow have been undertaken and the results are presented in order to demonstrate that the novel multi-electrode electromagnetic flow meter is highly suited in measuring volumetric flow rate and mapping the local average velocity of non-axisymmetric flow.

关 键 词：区域权函数 电磁流量计 非轴对称流 

分 类 号：TP216.1[自动化与计算机技术—检测技术与自动化装置]