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1. How to calculate the flow rate measured by a vortex flowmeter?
E=KBdV (where E - is the signal voltage (V) between the electrodes); B -- Magnetic flux density (large impulse T); D - Measure the inner diameter of the tube (M); V - Average flow velocity (M/S). ）In the equation, K and d are constants. Since the excitation current is constant, B is also constant. Therefore, from E=KBdV, it can be seen that the volume flow rate Q is proportional to the signal voltage E, that is, the signal voltage E induced by the flow velocity is linearly related to the volume flow rate Q. Extended Data Vortex Flow Meter is a volumetric flow meter produced based on the Karman vortex based simulation principle for measuring the volume flow rate, standard condition volume flow rate, or mass flow rate of gases, vapors, or liquids. Mainly used for flow measurement of industrial pipeline media fluids, such as gases, liquids, steam, and other media. The characteristics of vortex flowmeter are small pressure loss, large range, high accuracy, and it is almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring volumetric flow rate under working conditions. No movable mechanical parts, therefore high reliability and low maintenance. The instrument can maintain a stable and long-lasting pulse count. The vortex flowmeter adopts a piezoelectric stress sensor with high reliability and can operate within a temperature range of -20 ℃ to+250 ℃. Reference source: Baidu Baike - Electromagnetic flowmeter Reference source: Baidu Baike - Vortex flowmeter
2. What is the difference between vortex flowmeter and electromagnetic flowmeter?
There are differences between vortex flowmeters an
1. Different principles. Vortex flowmeters: Based on the "Karman vortex street" principle, non streamlined flow elements are used to generate vortices in the fluid, and the flow rate is calculated using the linear relationship between vortex frequency and medium flow velocity.
. Electromagnetic flowmeter: Based on Faradays law of electromagnetic induction, an induced potential is generated by cutting a magnetic field through a conductive liquid, and the flow rate is calculated by detecting the potential value through electrodes (formula E=K × B × V × D).2. Vortex flowmeter suitable for different media: suitable for liquids or gases, but with certain requirements for medium temperature, pressure, and viscosity.
. Not applicable to: viscous liquid, granular solid medium, liquid containing foam or bubbles. Advantages: No moving mechanical parts, long lifespan, low maintenance, stable instrument coefficient, but installation under vibration conditions should be avoided. Electromagnetic flowmeter: only applicable to conductive liquids (such as acid, alkali, salt solutions), with high requirements for medium purity. Limitation: Unable to measure non-conductive media (such as oil and gas).Thirdly, the accuracy error of vortex flowmeters varies: the accuracy and stability are relatively low, and the error range is usually between 1% and 2%.
. Electromagnetic flowmeter: With high accuracy and stability, the error can be controlled within 0.5%, making it suitable for high-precision measurement needs.4. Different Applicable Scenarios: Vortex flowmeters are suita
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