Overview of the development of the flowmeter

As early as in 1738, the Swiss Daniel Bernoulli first based on the Bernoulli equation using the method of differential pressure measurement of water flow. Then the italians G. B。 Venturi study measured with venturi tube flow, and in 1791 published the findings. In 1886, americans herschel applied venturi controls into water flow in the practical measurement device. The beginning of the 20th century to the middle of the original measurement principle to mature gradually, people will no longer thinking limitations on the original measurement scheme, but started a new discovery. In the 30 s, and discussed with acoustic measurement of liquid and gas flow rate of solutions of acoustic measurement flow, but until the second world war have not obtained great progress, until 1955, the application of sound cycle method markson flowmeter, used to measure the rate of flow of aviation fuel. After 60 s of the 20th century, flowmeter began to develop in the direction of motors, miniaturization, etc. With the rapid development of integrated circuit technology, the process of ultrasound (phase locked loop Wave) Flowmeter has been widely used, the wide application of microcomputer, further improve the ability of flow measurement, such as laser doppler velocimeter application of microcomputer, can deal with more complex signal.