Introduction to the development history of intelligent electromagnetic flowmeter

Intelligent electromagnetic flowmeter is a kind of precision measuring instrument, which is widely used in many industries such as industry, chemical industry, electric power, electronics, machine tools, shipbuilding, metallurgy, petroleum, medical and so on. With the continuous development of the times, the technology of intelligent electromagnetic flowmeters has been continuously improved and the fields of application have become more and more extensive. We need to master the development history of the intelligent electromagnetic flowmeter in the process of using it. This is very important for the user's use. The following is a brief introduction to the development history of the intelligent electromagnetic flowmeter.

After the Second World War, with the rapid development of the international economy and science and technology, flow metering has received increasing attention, and flow meters have developed rapidly. For example, in the N-century 1950s, the main flowmeters used in the industry already had three types of orifice plates, pitot tubes, and float flowmeters. The range of the measured medium was also narrow, but the measurement accuracy has begun to meet some low-level production. need. In the past 50 years, in order to meet the needs of different types of fluid characteristics and flow measurement under different flow conditions, the flowmeters that have been developed and put into use have speed flowmeters, volumetric flowmeters, momentum flowmeters, electromagnetic flowmeters, A new type of flowmeter with dozens of different measurement principles such as ultrasonic flowmeters.

Flowmeter is widely used in industrial and agricultural production, national defense construction, scientific research, foreign trade and daily life. With the development of industrial production to the direction of automation and the needs of people's daily life development, flow meters are used in the entire instrument production. The proportion is increasing, and the data shows that the flow meters used in different industrial sectors account for 15-30% of the total number of meters. The equipment of the flow meter directly affects the operation and cost accounting of the enterprise to a large extent, and there are more than one hundred kinds of flowmeters put into use at home and abroad. The reason why there are so many varieties is that there has not been found a flow meter that can be used for all flow measurement. Each product has its specific applicability and its limitations. Due to the complexity of flow measurement conditions and the rapid development of science and technology, people have put forward higher requirements for flow metering. The current situation of flow metering is far from meeting the needs of production and life. There are still a lot of technical problems to be further studied and solved. The main problems are as follows: The variety, specifications, accuracy and reliability of the flow meter cannot fully meet the requirements. Especially for the measurement of corrosive fluids, dirty fluids, highly viscous fluids, multiphase fluids, extra large flows, small flow rates, etc., effective measurement methods need to be developed; flow standard devices cannot meet the flowmeter verification requirements, especially the lack of on-site The technical means of verifying the flowmeter in real time. In response to the above problems, with the development of science and technology, people use the latest technological achievements to develop new flowmeters, and introduce new technologies such as ultrasonic, laser, electromagnetic, nuclear technology and microcomputer into the field of flow measurement, making indirect measurement of non-contact and non-moving parts. The technology has been greatly developed, and the flow sensor tends to be electronic, digital, and multi-functional, opening up new fields for flow measurement. The new flowmeter has the characteristics of wide range ratio, intelligence, high reliability, low price and convenient maintenance.