电磁流量计矩形与鞍状线圈感应磁场的数值仿真  

Numerical Simulation of the Induced Magnetic Field of Rectangular and Saddle Coils in Electromagnetic Flowmeter

作　　者：杜胜雪[1,2] 孔令富[1,2] 李英伟[1,2] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]河北省计算机虚拟技术与系统集成重点实验室,河北秦皇岛066004

出　　处：《计量学报》2016年第1期38-42,共5页Acta Metrologica Sinica

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

摘　　要：讨论了电磁流量计矩形和鞍状线圈所产生磁感应强度的分布情况。运用毕奥-萨伐尔定律和叠加原理，通过数值仿真得到励磁线圈在测量管道内电极横截面上的磁场分布情况。提出磁感应强度的方向平行程度和大小均匀程度2个指标，并用其来判别感应磁场分布的均匀程度。依据以上2个指标，分别对不同尺寸的矩形和鞍状励磁线圈所产生的感应磁场进行计算分析和优化。The distribution of magnetic fields generated by the rectangle and saddle exciting coils that are used for electromagnetic flowmeter is discussed. Using Biot-Savart law and superposition principle, the distribution of magnetic field on the cross section containing electrodes inside the measuring tube is obtained by numerical simulation. Two indicators direction parallel degree and uniform degree of magnetic field intensity was proposed to represent the magnetic field distribution uniformity. Analysis and optimization for the magnetic field generated by different sizes of rectangular and saddle exciting coils are separately done based on above two indexes, and further comparative analysis to the magnetic field generated by the two kinds of shape coils has been made.

关 键 词：计量学 电磁流量计 数值仿真 励磁线圈设计 感应磁场分布 

分 类 号：TB937[一般工业技术—计量学]