The principle and application of ultrasonic flow meter scale

Abstract: the principle and application of the ultrasonic flowmeter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. The basic principle of ultrasonic flowmeter, the basic principle of ultrasonic flowmeter and type ultrasonic wave travels in the flow of fluid in fluid velocity on load information. So by the received ultrasound can detect the fluid velocity, thus converted to flow. 。 More flow meter manufacturers choose model price quote you are welcome to inquire, here is the principle of ultrasonic flowmeter scale and details in this paper. The basic principle of ultrasonic flowmeter, the basic principle of ultrasonic flowmeter and type ultrasonic wave travels in the flow of fluid in fluid velocity on load information. So by the received ultrasound can detect the fluid velocity, thus converted to flow. According to the test, can be divided into velocity difference method, doppler method, beam deflection method, noise and the relevant laws such as different types of ultrasonic flowmeter. Sound waves flowmeter is more than ten years along with the rapid development of integrated circuit technology began to be used is a non-contact instrument, suitable for the measurement is not easy to contact and observation of fluid and reduce runoff. Its linkage with the water level meter can be open water flow measurement. Using ultrasonic flow than don't have to install the measuring element in fluid does not change the fluid flow state, does not produce additional resistance, instrument installation and maintenance are not affect the production line operation is an ideal energy-saving flowmeter. As is known to all, the current industrial flow measurement generally there is a big pipe diameter, flow measurement difficult problem, this is because the general flow meter with the increase of measuring diameter leads to manufacturing and transportation difficulties, can raise cost, loss increase, installation of these shortcomings, not only ultrasonic flowmeter can be avoided. Because of various kinds of ultrasonic flowmeter are outside the pipe installation, non-contact measurement, instrument cost has nothing to do with being measured pipe diameter size, and other types of flow meter with diameter increases, the cost increase, so the diameter is larger than the same ultrasonic flowmeter features the function of other type flowmeter is more superior. Is considered to be better reduce runoff measuring instrument, method of doppler ultrasonic flowmeter can measure the flow of two phase medium, it can be used in sewage and domestic sewage and other dirt flow measurement. In power plant, the portable ultrasonic flowmeter was used to measure turbine into water, quantity of steam turbine cycle, reduce the amount of runoff, take off the skin of the pipe flow meter is convenient than in the past. Ultrasonic flow juice can also be used for gas measurement. The applicable scope of the pipe diameter from 2 cm to 5 m, from a few meters wide open channel, culvert to 500 m wide rivers are applicable. In addition, ultrasonic flow measurement accuracy of the measuring instrument is almost not affected by measurement of body temperature, the effects of parameters such as pressure, viscosity, density, and can be made into non-contact and portable measuring instrument, it can solve the other type is difficult to measure by instrument of strong corrosion resistance, electrical conductivity, radioactive and flammable and explosive medium flow measurement problem. In addition, in view of the characteristics of non-contact measurement, combined with reasonable electronic circuit, an instrument can adapt to a variety of pipe diameter and flow range measurement. Ultrasonic flowmeter's ability to adapt is also the other instrument incomparable. Ultrasonic flowmeter has some of these advantages so it is more and more attention to the product seriation, generalization and development, has now made from different channels of standard type, high temperature, explosion-proof, wet type instrument so as to adapt to different medium, different occasions and different pipe flow measurement. The disadvantages of ultrasonic flowmeter is mainly to the current body temperature range by ultrasonic can in aluminum and coupling between transducer and pipeline material heat resistance level of restrictions, be sound transmission speed of flow and the heat raw data is not complete. At present our country can only be used to measure the fluid under 200 ℃. In addition, ultrasonic flowmeter measurement line is more complicated than the general flow meter. This is because, in general industrial measurement of liquid flow velocity is often a few meters per second, and propagation velocity of sound waves in a fluid is about 1500 m/s, by flow velocity ( Traffic) If requirement for the accuracy of measuring the velocity of 1%, the measurement accuracy of the sound velocity for 10 - 5 ~ 10 - 6 orders of magnitude, so must have perfect measuring circuit to realize, that is ultrasonic flowmeter is only under the former title of integrated circuit technology rapid development can be the cause of the practical application.

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