The application of Yuanneng ultrasonic flow meter in urban sewage treatment plant

Abstract: Yuanneng ultrasonic flow meter application information in urban sewage treatment plants is provided by excellent flow meter and flow meter manufacturers and quotation manufacturers. Yuanneng ultrasonic flowmeter is used in urban sewage treatment plants: In order to improve the increasingly serious water pollution situation, many cities have established sewage treatment plants, the sewage treatment rate has been significantly improved, and the water environment has gradually improved. With the rapid development and popularization of computer technology. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the article details of the application of Yuanneng ultrasonic flowmeters in urban sewage treatment plants. Yuanneng ultrasonic flowmeter is used in urban sewage treatment plants: In order to improve the increasingly serious water pollution, many cities have established sewage treatment plants, the sewage treatment rate has been significantly improved, and the water environment has gradually improved. With the rapid development and popularization of computer technology, the data acquisition system has also been used rapidly. The application of this system in the production process can collect, monitor and record the process parameters of the production site, and provide information and means for improving product quality and reducing costs. Data acquisition is to collect the analog signal output by the sensor and convert it into a digital signal that the computer can recognize and then process it further. Ultrasonic flow meters are instruments that measure flow by detecting the action of fluid flow on ultrasonic pulses. Like the electromagnetic flowmeter, it is a barrier-free flowmeter because the flow channel of the instrument is not provided with any obstructions. It is a type of flowmeter suitable for solving the difficult problem of flow measurement. It is also one of the flow meters that has developed rapidly in recent years. 2 Principles of Ultrasonic Flowmeter 2.1 Composition The non-contact ultrasonic measurement system consists of two parts: an ultrasonic signal transducer and an electronic transmitter and receiver installed at a distance. The transducer continuously emits a series of ultrasonic waves and receives reflected echoes from the liquid or solid surface being inspected. The microprocessor in the transmitter further processes the signal and displays the data as an LCD digital. (1) Sound waves are a type of mechanical waves with frequencies exceeding 2×Sound waves at 104Hz are ultrasonic frequencies that are inaudible to the human ear. The relationship between its wavelength L, frequency f and speed c is L=c/f (2) The reflection and refraction of ultrasonic waves When the sound wave propagates to the interface between the two media, part of it can return to the original medium, which is called reflected wave, and the other part can return to the original medium. The energy continues to propagate through the surface of the medium to the surface of another medium, which is called refracted wave. The law of reflection: Sina/ Sina'==C1/C2 where the incident angle a, the incident wave velocity C1, the reflection angle a', the reflected wave velocity C2. The law of refraction: SINa/SINb==C1/C2 In the formula, the incident angle a, the refraction angle b, C1 is the *medium wave speed, and C2 is the second medium wave speed. 2.2 The characteristics of ultrasonic flowmeter The remarkable characteristic of ultrasonic wave is that the frequency is high, so the wavelength is short, the diffraction phenomenon is small, and the directionality is good. Can be called a ray that propagates directionally. In liquids and solids, the attenuation is small, the penetration ability is large, and there will be significant reflections when encountering impurities or interfaces. Ultrasonic sensors are widely used in many scientific fields, ie industrial production, by using these salient features of ultrasonic waves. 2.3 Ultrasonic transducer Ultrasonic transducer, also known as ultrasonic probe, is a device that realizes the mutual conversion of electrical energy and sound energy. Ultrasonic transducer, namely probe. There are many kinds of ultrasonic transducers used for detection, such as piezoelectric type, magnetostrictive type, electromagnetic type, vibrating plate type, elastic surface wave type and so on. In the detection technology, the piezoelectric type is mainly used. 2.4 Analysis of advantages and disadvantages Advantages: ◆Can be used for non-contact measurement; ◆Measurement without flow obstruction, no pressure loss; ◆It can measure non-conductive liquid, which is a supplement to electromagnetic flowmeter without obstruction measurement. ◆The biggest advantage of ultrasonic flow level is that it can measure unobstructed flow without cutting off the pipeline. It is a flow meter that does not touch the medium. Disadvantages: ◆The propagation time can only be used for cleaning liquids and gases; while the Doppler method can only be used to measure liquids containing quantitative suspended particles and air bubbles; ◆The measurement accuracy of the Doppler method is not high. 3 Application of ultrasonic measurement is a method of measuring the storage of a container by determining the level. The ultrasonic sensor sends ultrasonic pulses to the surface of the material from above and receives the echoes reflected from the surface. It measures the propagation time of ultrasonic waves and calculates the distance from the reflecting surface. The travel time is an intuitive dimension of the distance between the ultrasonic sensor and the level. The distance a sound wave travels is the product of the travel time and the speed of sound. If the position of the ultrasonic sensor is known, then the level (and thus the reserve) can be converted. The speed of sound in air varies widely. Therefore, the acoustic sensor needs to be temperature compensated. If it is used for other gases other than air, it should be calibrated accordingly. 3.1 Measuring flow In the flow measuring instruments of sewage treatment plants, there are only two types of flow meters according to the installation type: pipeline type and open channel type. Open channel ultrasonic flowmeter is a kind of flowmeter widely used in sewage treatment plants.

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