The development of flow measurement can be traced back to ancient water conservancy projects and urban water supply systems.In the days of Caesar, orifice plates were used to measure the amount of drinking water.Ancient Egypt used weir to measure the flow of the Nile around 1000 BC.The famous dujiangyan water conservancy project in China USES the water level of bottle mouth to observe the water volume and so on.In the 17th century torricelli laid the theoretical foundation for the differential pressure flowmeter, a milestone in flow measurement.Since then, many types of flow-measuring instruments from the 18th and 19th centuries have taken shape, such as weirs, tracers, pitot tubes, venturi tubes, volumetric devices, turbines, and target-type flowmeters.In the 20th century, due to the rapid growth of process industry, energy measurement and urban public utilities' demand for flow measurement, meters developed rapidly. The rapid development of microelectronic technology and computer technology greatly promoted the renewal of meters, and new flowmeters emerged like mushrooms.So far, it is said that hundreds of flowmeters have been put on the market, and many thorny problems in field use are expected to be solved.
The development of modern flow measurement technology in China is relatively late.
Flow measurement is a science that studies the quantity change of matter, and the law of mutual change of mass is the basic law of the development of the relationship between things. Therefore, the object of measurement is no longer limited to the traditional sense of pipeline liquid, and any place that needs to master the quantity change has the problem of flow measurement.Flow rate, pressure and temperature are also listed as three major detection parameters.The energy of a given fluid can be calculated by knowing these three parameters, which must be detected in the measurement of energy conversion.Energy conversion is the basis of all production processes and scientific experiments. Therefore, flow rate, pressure and temperature meters are widely used.