具有异径测量管的低功耗电磁流量计研究

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。

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

A new design of battery powered electromagnetic flowmeter is proposed to reduce the power consumption and extend the life-time of the battery. Based on computer simulation, a new design of measurement pipe with locally shrunk cross section is proposed, the efficiency of the magnetic field excitation circuit is effectively enhanced, the sensitivity of the transducer is increased. A prototype flowmeter was developed based on the proposed design and was tested. 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 was proved.