The road of flowmeter development
The development of flow measurement can be traced back to ancient water conservancy projects and urban water supply systems. In the Roman caesar era, orifice plates were used to measure the drinking water of residents. The weir method was used in ancient Egypt around 1000 BC to measure the Nile discharge. The well-known Dujiangyan water conservancy project in China uses the water level of the treasure bottle mouth to observe the water level and so on. In the 17th century, Torri demolition laid the theoretical foundation for differential pressure flow meters, which is a milestone in flow measurement. Since then, prototypes of many types of meters for flow measurement in the 18th and 19th centuries have begun to form, such as weirs, tracers, pitot tubes, venturis, volumes, turbines, and target flow meters . In the 20th century, due to the rapid increase in the demand for flow measurement in process industry, energy measurement, and urban utilities, the rapid development of meters was promoted. The rapid development of microelectronics and computer technology has greatly promoted the upgrading of meters, and new flowmeters have sprung up like mushrooms. . So far, it is said that hundreds of flowmeters have been put on the market, and many difficult problems in field use are expected to be solved.
It is relatively late to carry out modern flow measurement technology in China, and the flow meters required in the early days are imported from abroad.
Flow measurement is the science that studies the change of mass. The law of mass change is the basic law of the development of the relationship between things. Therefore, its measurement object is no longer limited to the traditional pipeline liquid. There is a problem of flow measurement wherever the volume change needs to be mastered. Flow, pressure and temperature are listed as the three major detection parameters. For a certain fluid, as long as these three parameters are known, the energy can be calculated, and 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.