Abstract: How can ultrasonic
flow meters be used in agriculture? The information is provided to you by the excellent manufacturers of
flowmeters and flowmeters. As we all know, China is a big agricultural country, and agricultural water conservancy projects have always been the focus of national development. The development of agriculture is inseparable from water conservancy irrigation, so water conservancy flow measurement is also indispensable. The most advanced measuring instrument used in my country is. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is how ultrasonic flowmeters are used in agriculture? Article details. As we all know, China is a big agricultural country, and agricultural water conservancy projects have always been the focus of national development. The development of agriculture is inseparable from water conservancy irrigation, so water conservancy flow measurement is also indispensable. At present, the most advanced measuring instrument used in my country is the ultrasonic flowmeter, which adopts the velocity area measurement method: the measurement method is to use the ultrasonic flowmeter to multiply the average flow velocity of the water flow by the cross-sectional area of the channel. Install an ultrasonic flowmeter to measure. There are generally three measurement methods: one is the velocity distribution method; the second is the 0.6H method; the third is the 0.2H ~ 0.8H method. The velocity distribution method is to use an ultrasonic flowmeter to select different points between the surface and the bottom of the canal to measure the flow velocity, and then divide the area defined by the velocity curve by the depth of the velocity curve perpendicular to the water surface of these measuring points to calculate the average of the water flow. Velocity; the 0.6H method measures the flow velocity of a single point at a depth of 0.6H below the water surface, and assumes that this value is the average of all velocities; flow rate, the average of these two readings can be estimated as the average flow rate value. All three measurement methods use ultrasonic flowmeters to measure the average velocity of water flow in a specific area, and different measurement points may be selected to obtain different measurement results. European countries require at least 5 points to be measured, while the United States considers 2 points sufficient. The number of soundings depends on the width of the channel. The number of soundings in Europe is 5 to 15, and in the United States it is 8 to 18. The measurement error is determined according to the number of soundings and the measurement time at each point. The average error of the velocity-area method can be less than 6%. Water flow measurement in farmland irrigation can also use electromagnetic flowmeters. Ultrasonic technology calculates the flow rate by measuring the ultrasonic wave travel time across the channel. The transmitter and receiver are placed on both sides of the channel so that the angle between the path of the wave and the direction of the water flow is 45°C.°~60°within the range. This geometric relationship creates a time difference between the sound pulses in the upstream and downstream directions. Using an electromagnetic flowmeter, however, uses an artificially created magnetic field in a conductive water stream, and then measures a composite measurement across both sides of the stream. The electromagnetic flowmeter generally consists of an excitation coil and a pair of electrodes to form a measurement system. Although both ultrasonic flowmeters and electromagnetic flowmeters can be applied to the flow measurement of farmland irrigation water systems, in practical applications, considering various conditions such as the use environment, most of them still use ultrasonic flowmeters for measurement. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How can ultrasonic flow meters be used in agriculture? 》
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