When ultrasonic waves propagate in the moving fluid, they will carry information about the fluid speed. Therefore, the received ultrasonic wave can detect the flow rate of the fluid and convert it into the flow rate. According to different detection methods, it can be divided into different types of ultrasonic flowmeters, such as propagation velocity difference method, Doppler method, electron beam migration method, noise method and correlation method. Ultrasonic flowmeter is a non-contact instrument which has been applied with the rapid development of integrated circuit technology in recent ten years. It is suitable for measuring the flow of fluids and large pipelines that are difficult to contact and observe. It can be used with water level gauge to measure the flow of open water. Using ultrasonic flow ratio does not need to install measuring elements in the fluid, so it will not change the flow state of the fluid and produce additional resistance. The installation and maintenance of the instrument will not affect the production pipeline, and it is an ideal energy-saving flowmeter.
industrial flow measurement generally exists in large-diameter pipelines, and it is difficult to measure large flow. This is because the common flowmeter will bring difficulties to manufacturing and transportation with the measurement of pipeline diameter, resulting in increased cost and energy consumption. Installation not only has these disadvantages, but also can avoid using ultrasonic flowmeter. Because all kinds of 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 pipeline to be measured, while the cost of other types of flow meters increases greatly with the increase of cost. The diameter of. Therefore, compared with other flowmeters with the same function, the larger the diameter of the ultrasonic flowmeter, the better the functional price of the ultrasonic flowmeter. Ultrasonic flowmeter is considered to be a good instrument for measuring the runoff of large pipelines, which can measure the flow of two-phase media, so it can be used to measure dirty flow such as sewage. In power plants, it is more convenient to use portable ultrasonic flowmeter to measure large-scale pipeline runoff (such as turbine inlet water and turbine circulating water) than the past stripped pipe flowmeter. Ultrasonic waves generated by fluid flow can also be used for gas measurement. The pipe diameter ranges from 2 cm to 5 m, from a few meters wide open culvert to a 5 m wide river. In addition, the ultrasonic flow measurement accuracy of the measuring instrument is hardly affected by the temperature measurement of human body, but by the parameters such as pressure, viscosity and density. It can be made into a non-contact portable measuring instrument to solve the measurement problem that other types of instruments are difficult to measure, and has strong corrosion resistance, conductivity, radioactivity and the flow of flammable and explosive media. In addition, due to its non-contact measurement characteristics and reasonable electronic circuit, a single instrument can be used to measure various pipe diameters and flow ranges. The adaptability of ultrasonic flowmeter is incomparable with other instruments. Ultrasonic flowmeter has some advantages mentioned above, so it is paid more and more attention. With the development of serialization and generalization of products, they are made into instruments with different sound channel standards, high temperature resistance, explosion protection and humidity to adapt to different media and different environments. And flow measurement under different pipeline conditions.
our company is committed to industrial automation instrument engineering and process control. If you have any requirements, please contact us, and we will ask our technicians to help you solve the problem. High-tech instrument enterprises that manufacture pressure instruments, liquid level instruments, flowmeters and flow switches.