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| Transient Electromagnetic Flow Measurement Method Based on Voltage-to-current Ratio and its Realization |
| WU Jian-ping1,XU Ke-jun1,2,XU Wei1,WANG Chun-chang1,YU Xin-long1 |
1. School of Electrical & Automation Engineering, Hefei University of Tech, Hefei, Anhui 230009, China
2. Engineering Technology Research Center of Industrial Automation, Hefei, Anhui 230009, China |
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Abstract In order to achieve higher excitation frequency, improve response speed, and reduce the power consumption of electromagnetic flowmeter, the transient measurement method based on voltage-to-current ratio was proposed to determine the relationship between voltage-to-current ratio and flow. The hardware based on DSP was designed, then the excitation current and signal voltage in the transient state was collected to verify the processing method. The analysis of off-line data indicated that the relationship between ratio and flow is well. The transient measurement method was implemented in real time by the designed DSP software, and the calibration experiment of water flow was performed, and the power consumption was also tested. The results of experiment show that the measurement accuracy reaches class 0.5, same as ordinary electromagnetic flowmeter. Comparison shows that excitation power consumption of electromagnetic based on transient measurement principle is 30% of the ordinary.
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Received: 12 March 2018
Published: 01 September 2019
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Corresponding Authors:
Ke-Jun Xu
E-mail: dsplab@hfut.edu.cn
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2019, Vol. 40 
