Explosion proof ultrasonic flowmeter

『Explosion proof ultrasonic flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. Principle of Ultrasonic Flow Meter According to the principle of signal detection, ultrasonic flow meters can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method, and frequency difference method), beam offset method, Doppler method, cross-correlation method, spatial filtering method, and noise method. Ultrasonic flow meters and ultrasonic flow meters, due to the absence of obstacles in the flow channel of the instrument, belong to unobstructed flow meters and are suitable for solving flow measurement problems of a type of flow meter. They have more prominent advantages in large flow measurement and are a rapidly developing type of flow meter. Ultrasonic flowmeter adopts the principle of time difference measurement: a probe signal passes through the pipe wall, medium, and the other side of the pipe wall, and is received by another probe. Meanwhile, due to the influence of medium velocity, the emission signal of the second probe is also delayed by the δ T received by the first probe. According to the calculation, the flow rate Q can be obtained by converting the flow velocity V to the time difference δ TV=(C2)/2LX δ T, which indicates that when ultrasonic waves propagate in a moving fluid, they will carry information about the fluid velocity. Therefore, the received ultrasound can detect the flow rate of the fluid and convert it into flow rate. According to different detection methods, ultrasonic flow meters can be divided into different types such as propagation velocity difference method, Doppler method, electron beam transfer method, noise method, and correlation method. Ultrasonic flowmeter is a non-contact instrument that has been applied in the past decade with the rapid development of integrated circuit technology. Suitable for measuring the flow rate of fluids and large pipelines that are difficult to access and observe. It can be used together with a water level gauge to measure the flow rate of open water. The use of ultrasonic flow does not require the installation of measuring elements in the fluid, so it will not change the flow state of the fluid and generate additional resistance. The installation and maintenance of the instrument will not affect the production pipeline, making it an ideal energy-saving flowmeter. Industrial flow measurement generally exists in large-diameter pipelines, and measuring large flow rates is relatively difficult. This is because ordinary flow meters pose difficulties in manufacturing and transportation due to the measurement of pipeline diameter, resulting in increased costs and energy consumption. Installation not only has these drawbacks, but also avoids the use of ultrasonic flow meters. Due to the fact that various ultrasonic flow meters can be installed outside the pipeline for non-contact flow measurement, the cost of the instrument is basically independent of the diameter of the measured pipeline, while the cost of other types of flow meters increases significantly with the increase of cost. The diameter. Therefore, compared with other flow meters with the same function, the larger the diameter of the ultrasonic flow meter, the better the functional price of the ultrasonic flow meter. Ultrasonic flowmeter is considered a good instrument for measuring the flow rate of large pipelines, which can measure the flow rate of two-phase media and can therefore be used to measure the flow rate of dirty materia

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