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1. Working principle of ultrasonic flowmeter
The core working principle of ultrasonic flowmeter is based on the dependency relationship between the speed of sound wave propagation in the fluid and the fluid flow velocity. When ultrasound propagates along a pipeline, the flow of liquid causes a small change in propagation time, which is proportional to the flow velocity of the liquid. Under no flow conditions, the time required for two ultrasonic sensors to emit and receive sound waves is the same, making ultrasonic flow meters the only technology capable of actually measuring flow in the absence of flow. When a liquid flows, the transmission time of sound waves in the upstream direction is longer than that in the downstream direction. The application of ultrasonic flowmeter includes
1. Judging whether the liquid in the pipeline is flowing full: Through ultrasonic technology, it is possible to distinguish whether the liquid in the pipeline is flowing full. If the flow is not full, the liquid level height can be further determined. If the liquid level exceeds half of the pipeline section, the flow velocity of the medium can be measured and the actual flow rate can be calculated based on it. 2. Determine the temperature of the medium inside the pipeline: the medium at different temperatures has different sound velocities. Ultrasonic flowmeter can measure the speed of sound, and combined with knowledge of the medium, the temperature of the medium can be calculated. 3. Determine the type of medium in the pipeline. In the chemical industry, it is very important to confirm the type and type of medium in the sealed container to avoid mixing flammable, explosive, or highly reactive substances. Some ultrasonic flo
2. Working principle of ultrasonic flowmeter
The working principle of ultrasonic flowmeter is as follows: when the ultrasonic beam propagates in the liquid, the flow of the liquid will cause a small change in propagation time, and the change in propagation time is proportional to the flow velocity of the liquid.
. When there is zero flow, the time required for two sensors to emit and receive sound waves is exactly the same (the only technology that can actually measure zero flow). When liquid flows, the sound wave transmission time in the upstream direction is greater than that in the downstream direction. The function of ultrasonic flowmeter1. Ultrasonic flowmeter can determine whether the liquid in the pipeline is flowing full. By borrowing the working principle of ultrasonic flowmeter, it is easy to determine whether the liquid in the pipeline is flowing full. If it is not flowing full, it can further determine the liquid level height in the pipeline. If the liquid level height is higher than half of the pipeline section, the flow velocity of the medium can be tested, and the actual flow rate of the medium in the pipeline can be calculated. Secondly, ultrasonic flow meters can determine the temperature of the medium inside the pipeline. The speed of sound of the medium at different temperatures varies, and ultrasonic flow meters can measure the speed of sound. With the known medium, the corresponding temperature of the medium can be measured by the speed of sound value of the ultrasonic flow meter. <
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