Measuring the type and working principle of flow meter

Abstract: the measurement of flow meter type and working principle of the information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. In 1738, the Swiss Daniel Bernoulli * based on the Bernoulli equation, the differential method is used to measure water flow; Later humanities venturi Italian study measured with venturi tube flow, and in 1791 published the results of the study; In 1886, americans herschel use dome. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the type and working principle of measuring flow meter article details. Type flowmeter flowmeter principle click understand flowmeter principle of all kinds and common flowmeter dynamic figure in 1738, the Swiss Daniel * & middot; Bernoulli based on the Bernoulli equation, the differential method is used to measure water flow; Later humanities venturi Italian study measured with venturi tube flow, and in 1791 published the results of the study; In 1886, americans herschel venturi tube was used to measure water flow of practical device. The beginning of the 20th century to the middle of the original measurement principle is gradually mature, people began to explore new measuring principle. Since 1910, the United States began working on measurement of water flow in open trench slot type flowmeter. In 1922, Mr Bashir will be YuanWenQiu reform for Mr Bashir sink sink in. From 1911 to 1912, American hungarians Carmen put forward the new theory of the karman vortex street; 30 s, and discussed with acoustic measurement method of liquid and gas flow, but until the second world war did not get a great progress, it was not until 1955 that have applied acoustic markson flowmeter of circulation method, is used to measure the flow of aviation fuel. In 1945, colin with alternating magnetic field successfully measured the blood flow. After the 20th century 60 s, measuring instrument began to develop in the direction of motors, miniaturization, etc. For example, in order to improve the accuracy of the differential pressure meter, the force balance and capacitive differential pressure transmitter; differential pressure transmitter To make electromagnetic flowmeter sensor miniaturization and to improve the signal-to-noise ratio, appeared in non-uniform magnetic field and low-frequency excitation way of electromagnetic flowmeter. In addition, wide measuring range and no activity detection part of practical karman vortex street flowmeter has also appeared in the 70 s. Flow measurement instrument flow meter is used to measure the liquid, gas or steam pipe or pumping fluid flow, such as industrial automation instrument, also known as flow meter. Traffic is refers to the unit time the number of fluid flowing through a pipe section effectively fluid called volume flow quantity expressed in volume, the unit is meters? When /, /, etc. ; Fluid quantity expressed in quality is known as the mass flow rate, unit is when, kg/t /, etc. With the rapid development of integrated circuit technology, a phase locked loop technique ultrasound ( Wave) The 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. Traffic can be indirect measurement by the use of all kinds of physical phenomenon, so there are many different kinds of flow measuring. Differential pressure type according to the method of measurement points, flowmeter, variable area, displacement, speed and electromagnetic, etc. Differential pressure flow meter is very widely used type of flow measurement instrument, accounts for about 70% of the total flow measurement instrument. It consists of two parts, throttling device and differential gauge, filled with the fluid flowing through the throttling pipe. ( Such as orifice plate) , flow in the orifice plate beam forming local contraction, the increased velocity and static pressure drops in produce pressure difference before and after the orifice, the differential pressure is directly proportional to the square of the flow. Measuring differential pressure meter with strain, capacitance and arithmetic of vibrating string type pressure transducer, and dual bellows differential pressure gauge and other types. This kind of instrument debugging is convenient, and standardization. As long as the throttle device with differential pressure gauge can be used to measure the rate of flow of fluid. The main form of variable area flowmeter is turn ( Float) Flow meter, is composed of tapered glass tube and float, float to move up and down in the vertical installation of tapered glass tube. By flow from bottom to top through the body wall and float ring gap between, in order to float up, at this time between the tube and float ring gap area increases, until the float force and formed by the pressure difference on both sides of float when gravity is equal, float in a balanced position. Flow changes on both sides of the float force changes, which is formed by the pressure differential float and rebalance on a new location, the height of the float float is the meter reading. Turbine flow meter is composed of sensor and display instrument, sensor is mainly composed of magnetoelectric induction converter and the turbine.

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