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How to ensure the zero stability of the electromagnetic flowmeter

How to ensure the zero stability of the electromagnetic flowmeter. The low-frequency rectangular wave excitation is used; in order to accurately measure the flow rate of the liquid-solid two-phase conductive fluid and the low-conductivity fluid, the excitation power consumption is further reduced, and the sensor is compact and lightweight integrated, and a higher-frequency rectangle must be used. Wave excitation, sacrificing the zero stability of the electromagnetic flowmeter. In order to solve the outstanding contradiction between zero stability, response speed and anti-interference ability, the best solution is to use the method of double-frequency rectangular wave excitation, so that the electromagnetic flowmeter has both low-frequency rectangular wave excitation and good stability and high The frequency rectangular wave excitation reduces the magnitude of mud interference and flow noise, obtains the fast response speed of the instrument, and further reduces the excitation power consumption, improves the signal-to-noise ratio of the output signal of the electromagnetic flow sensor, and becomes the excitation technology in the era of electromagnetic flow planning.

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