摘要
在非理想流场条件下,异径电磁流量传感器将产生较大的测量误差。提高传感器权函数分布均匀度,有助于提高传感器的非理想流场测量性能。因此,需要开展传感器权函数分布规律的研究。基于有限元软件COMSOL,分析了4种异径电磁流量传感器权函数的均匀度,结果表明:矩形异径传感器的权函数最均匀。建立矩形异径电磁流量传感器三维模型,研究权函数与矩形段长宽高的分布规律,结果表明:矩形段高度对权函数均匀性的影响最大,宽度稍小,长度影响最小。矩形段的高度和宽度越小,权函数分布越均匀,测量结果受非理想流场的影响越小。
In non-ideal flow field measurement conditions,electromagnetic flow sensor with locally shrunk measurement pipe will have a big measurement error.Increasing the uniformity of weight function distribution of sensor helps to improve its non-ideal flow field measurement performance.Therefore,it is necessary to carry out research on the distribution law of weight function of sensor.Based on the finite element software COMSOL,firstly,analyze the uniformity of weight function of electromagnetic flow sensors with four different locally shrunk measurement pipe.Results show that weight function of sensor with rectangular section is the most uniform.Then,a three-dimension model for electromagnetic flow sensor with rectangular shrunk measurement pipe is established.And the distribution law of weight function with length,width,and height of the rectangular segment is studied.Results show that,the height of rectangular segment has the greatest effect on the uniformity of the weight function,the width has a slightly smaller effect,and the length has the smallest effect.The smaller the height and width of the rectangular segment are,the more uniform the weight function distribution is,and the smaller the influence of the non-ideal flow field on the measurement result is.
作者
葛玉石
梁利平
徐科军
杨双龙
许伟
吴建平
GE Yushi;LIANG Liping;XU Kejun;YANG Shuanglong;XU Wei;WU Jianping(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)
出处
《传感器与微系统》
CSCD
2019年第8期25-28,32,共5页
Transducer and Microsystem Technologies
基金
中央高校基本科研业务费专项资金资助项目(JZ2018HGTA0218,JZ2018YYPY0294)
安徽省自然科学基金资助项目(1708085QF132,1608085QE120)
关键词
电磁流量传感器
异径
COMSOL
权函数
仿真
electromagnetic flow sensor
locally shrunk measurement pipe
COMSOL
weight function
simulation
