Meihuayi predicts the development trend of flowmeters in 2018
Development History
As early as 1738, the first Bernoulli of Swiss Daniel used the differential pressure method to measure water flow based on the Bernoulli equation. Later, the Italian GB Venturi studied using a Venturi tube to measure flow, and published the results of the study in 1791. In 1886, American C. Herschel made a practical device for measuring water flow using Venturi tubes. From the early to the mid-20th century, the original measurement principles gradually matured, and people began to explore new measurement principles. Since 1910, the United States began to develop measurement Trough flowmeter for water flow in open channels. In 1922, RL Parshall reformed the original Curry sink into a Parsell sink (named by the American Society of Civil Engineers in 1929). From 1911 to 1912, the Hungarian American T. von Carmen proposed a new theory of Carmen Vortex. In the 1930s, methods for measuring the flow velocity of liquids and gases using sound waves appeared, but no great progress was made until the Second World War. It was not until 1955 that Maxon flowmeters using the sound circulation method (two types) were used. Used to measure the flow of aviation fuel. In 1945, A. Colin used alternating magnetic fields to successfully measure blood flow. Since the 1960s, the instrument has developed in the direction of precision and miniaturization. For example, in order to improve the accuracy of differential pressure instruments, there are force balance differential pressure transmitters and capacitive differential pressure transmitters; in order to miniaturize the sensors of electromagnetic flowmeters and improve the signal-to-noise ratio, non-uniform magnetic fields and low frequencies appear. Electromagnetic flowmeter in excitation mode. With the rapid development of integrated circuit technology, ultrasonic (wave) flowmeters with phase-locked loop technology have also been widely used. The wide application of microcomputers has further improved the ability of flow measurement. For example, laser Doppler velocimeters use microcomputers to process more complex signals.
development trend
In industrial sites, instruments that measure fluid flow are collectively called flow meters or flow meters. It is one of the most important instruments in industrial measurement. With the development of industry, the accuracy and scope of flow measurement are getting higher and higher. In order to adapt to various uses, various types of flowmeters have come out one after another. They are widely used in oil and gas, petrochemical, water treatment, food and beverage, Pharmaceutical, energy, metallurgy, pulp and paper and building materials industries. Frost & Sullivan Consulting uses a 360-degree full-view research model, focusing on the global, comprehensive application of industry, technology development, economy, competitive environment and industry users, and other modules to conduct a comprehensive study of the flowmeter market. In this paper, volumetric flowmeter, turbine flowmeter (typical impeller flowmeter), differential pressure flowmeter, variable area flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, vortex flowmeter (typical fluid oscillation flow rate) Meter), Coriolis mass flowmeter and plug-in thermal mass flowmeter as research objects, to analyze the market.
In 2018, the purchase demand for flowmeters will inevitably increase significantly
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