The development of flow measurement can be traced back to ancient water conservancy projects and urban water supply systems. In the Caesar era of ancient Rome, orifice plates were used to measure the amount of drinking water for residents. Around 1000 BC, ancient Egypt used the weir method to measure the flow of the Nile River. The famous Dujiangyan water conservancy project in my country used the water level of Baopingkou to observe the water volume, etc. In the 17th century, Torricelli laid the theoretical foundation for the differential pressure flowmeter, which was a milestone in flow measurement. Since then, the prototypes of many types of flow measurement instruments in the 18th and 19th centuries began to take shape, such as weirs, tracer methods, pitot tubes, venturi tubes, volumetric, turbine and target flowmeters. In the 20th century, the rapid growth of demand for flow measurement in process industries, energy metering, and urban utilities led to the rapid development of instruments. The leapfrog development of microelectronics technology and computer technology has greatly promoted the replacement of instruments, and new flowmeters have sprung up like mushrooms after rain. So far, it is said that hundreds of flowmeters have been put on the market, and many difficult problems in on-site use are expected to be solved.
my country started to develop modern flow measurement technology relatively late, and the flow meters needed in the early days were all imported from abroad.
Flow measurement is a science that studies the change of mass of matter. The law of mutual change of mass is the basic law of the connection and development of things. Therefore, its measurement object is no longer limited to pipeline liquids in the traditional sense. Wherever there is a need to grasp the change of mass, there is a problem of flow measurement. Flow, pressure and temperature are listed as the three major detection parameters. For a certain fluid, as long as these three parameters are known, its energy can be calculated. These three parameters must be detected in the measurement of energy conversion. Energy conversion is the basis of all production processes and scientific experiments, so flow, pressure and temperature instruments are the most widely used.