The UCF Ultrasonic Open Channel Flowmeter is a high-precision instrument that uses ultrasonic waves to measure the flow of a Venturi canal or a Bachelor channel. The UCF Ultrasonic Open Channel Flowmeter is a high-precision measurement of venturi canals or basses using ultrasonic waves. The meter for the flow of the tank. It measures the time that the sound wave is reflected back after it touches the surface of the channel, and then calculates the flow of the channel according to the formula. It provides the flow output, the flow rate and the total flow. Application of water and sewage treatment influent channels, discharge channels and other working principles. The flow measurement principle of the measuring water tank is the larger the flow rate in the open channel, the higher the liquid level; the smaller the flow rate, the lower the liquid level (Fig. 2). For general channels, there is no definite correspondence between liquid level and flow. Because of the same water depth, the flow rate is also related to the cross-sectional area, slope, and roughness of the channel. Install the water gutter in the channel (Fig. 3). Because the gap of the crucible or the groove of the UCF ultrasonic open channel flowmeter is smaller than the cross-sectional area of ​​the channel, the corresponding relationship between the water level and the flow upstream of the channel Mainly depends on the geometry of the gutter. The same water level gutter is placed on different channels, and the same liquid level corresponds to the same flow rate. The measuring water tank turns the flow into a liquid level. By measuring the level of the water flowing through the water sump, the flow rate can be determined according to the water level-flow relationship of the corresponding amount of water sump. The types of commonly used water gutters are shown in Figure 3. Right angle triangle å ° water flow direction water flow direction right angle triangle å ° water level flow is small, when the water level is lower, the water level is higher, the water level is higher, the water level is higher, the water level is changed to the liquid level B, the angle B bbp, the triangle å ° rectangle å ° Bachel Slot p Figure 3 Commonly used water level type The water level-flow relationship of the water tank can be found in the national metrological verification procedure "Ming Channel and Gutter Flowmeter" JJG711-90. Chapter 7 of this manual excerpts some common types. Each type of water gutter has its own fixed water level-flow correspondence. When determining the water level-flow relationship, the triangular ridge requires parameters such as channel width B, opening angle, and upstream ridge height p; rectangular å ° must have parameters of channel width B, opening width b, and upstream ridge height p; The slot only requires parameter b with the throat width. 2, ultrasonic liquid level principle (Figure 4) This instrument uses ultrasonic echo ranging method to measure liquid level. The probe is fixedly installed above the water level observation point of the water level (see the description of the groove structure for the position of the water level observation point). The probe is aimed at the water surface. The probe emits ultrasonic waves to the surface of the water. The ultrasonic wave reaches the water surface after t time. This part of the energy is reflected by the water surface and is received by the probe. The meter records the length t of this time. A temperature sensor is installed inside the probe and a temperature signal is transmitted to the meter. The meter calculates the current temperature of the probe, and calculates the distance D from the water surface to the probe through temperature compensation according to the propagation speed of the ultrasonic wave and the elapsed time t. -2- UCF Ultrasonic Open Channel Flowmeter Technical Data Figure 4 Principle of Ultrasonic Measurement of Liquid Level 3. Working Principle of Instrument (Figure 5) The instrument controls the probe to transmit and receive ultrasonic waves. According to the process of Figure 5, the liquid level is changed to liquid level (unit: m). Then, by checking the water level-flow meter, the liquid level is converted into flow rate (unit: cubic meter / hour). The water level-flow meter is a plate flow meter http://
Magnetic flap level gauge http://
Input type liquid level transmitter http://://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Sheet Metal Fabrication,Cnc Bending Parts,Metal Flat Bracket,Customized Sheet Metal Fabrication
JIANGSU TONGDE INTERNATIONAL TRADE CO.LTD. , https://www.jstongdetrade.com