The Influence Of Electromagnetic Flowmeter Diameter On Measuring Flow

Electromagnetic flowmeter is a commonly used flow measurement instrument, which measures the flow of liquid or gas through the principle of electromagnetic induction. In the measuring process of electromagnetic flowmeter, caliber is a very important parameter, which has an important impact on the accuracy and stability of flow measurement. This paper will analyze the measuring principle, measuring accuracy and using effect of electromagnetic flowmeter from the aspect of aperture, and discuss the influence of aperture on electromagnetic flowmeter measurement.
Influence of aperture on measuring principle of electromagnetic flowmeter.
The measuring principle of electromagnetic flowmeter is to measure the flow of conductive liquid by magnetic field induction. When the conductive liquid flows through the measuring tube, the charge motion in the liquid generates a magnetic field disturbance, which is sensed by the magnetic field sensor and generates a voltage signal to measure the flow rate of the liquid. Due to the different flow rate and flow position of the liquid, the range of magnetic field interference and the receiving range of the magnetic field sensor will be different under different calibers, thus affecting the measurement accuracy and stability of the electromagnetic flowmeter.
The smaller the diameter, the faster the flow rate of the liquid, the smaller the range of magnetic field interference, so the signal received by the magnetic field sensor will be affected by greater noise interference, thus affecting the measurement accuracy and stability of the electromagnetic flowmeter. In addition, in the case of small caliber, due to the narrow flow path, it is easy to have poor liquid flow, affecting the measurement effect of the electromagnetic flowmeter.
The larger the diameter, the slower the flow rate of the liquid, the greater the range of magnetic field interference, so that the signal received by the magnetic field sensor will be more stable, thereby improving the measurement accuracy and stability of the electromagnetic flowmeter. In addition, in the case of large caliber, due to the wide flow channel, the liquid flow is smooth, thus improving the measurement effect of the electromagnetic flowmeter.
Influence of aperture on measuring accuracy of electromagnetic flowmeter.
The measuring accuracy of the electromagnetic flowmeter refers to the error between the flow value measured by the electromagnetic flowmeter and the actual flow value. The diameter will directly affect the measuring accuracy of the electromagnetic flowmeter. The larger the diameter, the higher the measuring accuracy of the electromagnetic flowmeter, the smaller the diameter, the lower the measuring accuracy of the electromagnetic flowmeter.
This is because in the case of large caliber, the flow rate of the liquid is relatively slow, and the change of the flow rate is relatively stable, so that the signal received by the magnetic field sensor is relatively stable, thereby improving the measurement accuracy of the electromagnetic flowmeter. In the case of small caliber, the flow rate of the liquid is relatively fast, and the change of the flow rate is relatively drastic, which makes the signal received by the magnetic field sensor relatively unstable, thus reducing the measurement accuracy of the electromagnetic flowmeter.
In addition, the size of the caliber will also affect the repeatability and stability of the electromagnetic flowmeter. In the case of large caliber, the repeatability and stability of electromagnetic flowmeters are relatively high, because the change of liquid flow is relatively smooth. In the case of small caliber, the repeatability and stability of electromagnetic flowmeters are relatively low, because the liquid flow rate changes more violently.
The influence of diameter on the use effect of electromagnetic flowmeter.
The size of the aperture will also affect the use of the electromagnetic flowmeter, which is reflected in the following aspects:
1. The electromagnetic flowmeter with smaller diameter can be used in a smaller pipeline, while the electromagnetic flowmeter with larger diameter needs to be used in a larger pipeline, which will affect the scope and effect of the electromagnetic flowmeter.
2. The electromagnetic flowmeter with a smaller diameter can measure the liquid with a faster flow rate, but its accuracy and stability are relatively low; Large diameter electromagnetic flowmeters can measure liquids with slower flow rates, and their accuracy and stability are relatively high.
3. Smaller caliber electromagnetic flowmeters are usually cheaper than larger caliber electromagnetic flowmeters, but it should be noted that if the accuracy and stability of the flow measurement requirements are higher, the selection of larger caliber electromagnetic flowmeters may be more expensive. To suit.