重庆邮电大学学报（自然科学版）2016，Vol.28Issue(4)：487-493,7.DOI:10.3979/j.issn.1673-825X.2016.04.008
电磁流量计矩形波励磁的信号模型研究
Signal model with rectangular wave excitation for electromagnetic flowmeter
摘要
Abstract
The traditional rectangular wave excitation model fails to take into account both the influence of the sensor mag-netic circuit system and the excitation system simultaneously,and ignores the signal sampling process,thus,the signal model with rectangular wave excitation does not match the real conditions well.Based on the general equation of magnetic excitation current,a rectangular wave excitation model is proposed in this paper.This model demonstrates the mathematical relationship between the magnetic flux density and the relative parameters of magnetic circuit system and magnetic excitation system,and quantifies the differential interference and in-phase interference.On the basis of the proposed magnetic excita-tion model,a flow signal model with rectangular wave magnetic excitation is constructed via simulating the signal sampling process in electromagnetic flowmeter,and an identification method for the model parameters is also presented.A simulation experiment of flow signal and three practical experiments including model parameter identification,zero-point drift predic-tion and basic error estimation were carried out.The experimental results show that the maximum zero drift prediction error is 1.48 mm/s,and the maximum basic deviation is 0.270%.关键词
电磁流量计/信号模型/矩形波励磁/零点漂移/基本误差Key words
electromagnetic flowmeter/signal model/rectangular wave excitation/zero-point drift/basic error分类
信息技术与安全科学引用本文复制引用
李新伟,李斌,张欣,王高扬,王贯兵..电磁流量计矩形波励磁的信号模型研究[J].重庆邮电大学学报（自然科学版）,2016,28(4):487-493,7.基金项目
高等学校博士学科点专项科研基金（20123108110011） Foundation ItemThe Research Fund for the Doctoral Program of Higher Education of China （）
