Development of an Electromagnetic Flowmeter with Dual Frequency Excitation

Tiejun Liu, Tongsheng Gong, Yinjia Chen


A design of electromagnetic flowmeter with time division dual frequency excitation is proposed. The new design keeps the advantages of zero-point stability of the conventional electromagnetic flowmeter.The immunity to low frequency noise is enhanced, and the dynamic response to the fast change of flow velocity is improved. A prototype flowmeter was made based on the proposed design. The experiment result shows that the prototype flowmeter can measure water flow in a wide velocity range with satisfactory accuracy.



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