具有异径测量管的低功耗电磁流量计研究  

Study on Low-Power Electromagnetic Flowmeter with Locally Shrunk Measurement Pipe

作　　者：刘铁军[1] 宫通胜[1] 陈寅佳[1] 

机构地区：[1]中国计量学院计量测试工程学院,杭州310018

出　　处：《传感技术学报》2013年第3期348-352,共5页Chinese Journal of Sensors and Actuators

基　　金：浙江省重点科技创新团队项目(2009R50024);浙江省教育厅科研项目(Y201018818)

摘　　要：为了实现电磁流量计的低功耗设计,提出一种具有异径测量管道的电磁流量传感器设计方案。基于FLUENT软件对异径测量管道内部流场进行了仿真分析,证明了该新型电磁流量传感器的励磁效率和输出灵敏度相比于传统设计有显著提高。根据所提出的设计方案研制了电磁流量计原型样机,实验结果表明样机测量精度在全量程范围内优于±0.5%,采用高能锂电池组供电可连续工作三年以上,验证了本文所提设计方案的可行性。To reduce the power consumption of electromagnetic flowmeters, a new design of electromagnetic flow transducer with locally shrunk measurement pipe is proposed. Based on digital simulation with the FLUENT software, the velocity field in the locally shrunk measurement pipe is analyzed. It is proved that, compared with con- ventional design, the efficiency of the magnetic field excitation circuit can be effectively enhanced, the sensitivity of the transducer can be increased. A prototype flowmeter has been developed based on the proposed design. The experiment result shows that the prototype has the precision better than 0.5% over the specified measurement range. When powered with a high power lithium battery set, the prototype can work for more than 3 years continuously. The feasibility of the proposed design has been proved.

关 键 词：电磁流量计 异径管道 流速分布 功耗 

分 类 号：TH814[机械工程—仪器科学与技术]