Ultrasonic flowmeter I. Working principle and type: Our factory is a professional research and development and production of various instruments and meters, and has achieved many research results in this field for decades, especially the production technology of flowmeters and other products has reached domestic and foreign First-class level, excellent product performance and quality clearance. Here we provide some information and opinions on the ultrasonic flowmeter to the majority of users.
工作的原理是利用超声波在流动的流体中传播，从而输出流体流速信息。 The working principle of the ultrasonic flowmeter is to use ultrasonic waves to propagate in a flowing fluid, thereby outputting fluid flow rate information. Therefore, the flow velocity of the fluid can be detected by the received ultrasonic wave, and then converted into a flow rate. In recent years, due to the different nature of the fluid being tested and the working environment of the instrument in each user unit, in order to meet the needs of the market and meet the requirements of the majority of users, the types of ultrasonic flow meters have also been continuously developed and expanded. Different methods, it is divided into different types of ultrasonic flowmeters such as the propagation velocity difference method, Doppler method, beam offset method, noise method and related methods.
2. Scope and advantages: In the past ten years, with the rapid development of integrated circuit technology, ultrasonic flowmeters have only begun to be widely used. It is a non-contact instrument. Mainly suitable for measuring fluids that are difficult to observe and contact, as well as large pipe flow. It is linked with the water level gauge to measure the flow of open water. The use of ultrasonic flowmeters does not require the installation of measuring elements in the fluid, so it will not change the flow state of the fluid, generate no additional resistance, and the installation and maintenance of the instrument will not affect the operation of the production pipeline.
现状及发展形势研究： Research on the status and development of ultrasonic flowmeters :
As we all know, the current industrial flow measurement generally has problems of large pipe diameter and large flow measurement. This is because the general flow meter will cause difficulties in manufacturing and transportation with the increase of the measurement pipe diameter, increase the cost, and increase the energy loss. Large, installation not only these disadvantages, ultrasonic flowmeters can be avoided. Because all types of ultrasonic flowmeters can be installed outside the pipe and non-contact flow measurement, the cost of the instrument is basically independent of the size of the pipe being measured, while other types of flowmeters have a large increase in cost as the diameter increases, so the larger the ultrasonic wave The flowmeter has a better price / performance ratio than other types of flowmeters with the same function. It is considered to be a good instrument for measuring large-diameter flow. The Doppler ultrasonic flowmeter can measure the flow of dual-phase medium, so it can be used for the measurement of sewage and sewage. In power plants, portable ultrasonic flowmeters are used to measure large pipe diameters, such as water intake of turbines and circulating water of turbines, which is much more convenient than the traditional tube peeling flowmeter. Ultrasonic flow-through juice can also be used for gas measurement. The applicable range of pipe diameter is from 2cm to 5m, and it can be used from a few meters wide open channel and underdrain to 500m wide river.
In addition, the accuracy of flow measurement of ultrasonic measuring instruments is hardly affected by parameters such as temperature, pressure, viscosity, and density of the fluid being measured. It can also be made into non-contact and portable measuring instruments, so it can solve the problems that other types of instruments are difficult to measure. Flow measurement of corrosive, non-conductive, radioactive and flammable and explosive media. In addition, in view of the characteristics of non-contact measurement, and equipped with reasonable electronic circuits, one instrument can be adapted to a variety of pipe diameter measurement and a variety of flow range measurement. 的适应能力也是其它仪表不可比拟的。 The adaptability of ultrasonic flow meters is also unmatched by other instruments. The ultrasonic flowmeter has some of the advantages mentioned above, so it has been increasingly valued and developed towards product series and generalization. Now it has been made into standard, high temperature, explosion-proof, and wet-type meters with different channels to adapt to different media. Measurements of occasions and different pipeline conditions.