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What is the working principle of gas ultrasonic flowmeter? Gas ultrasonic flowmeter is a precision device that uses ultrasonic waves to measure fluid flow rate. Its working principle is based on the velocity information carried by dust during the propagation of ultrasonic waves in fluids, which is measured by receiving signals and then converted into flow values. When sound waves propagate in a liquid, the turbulent flow of the fluid causes a slight change in the propagation time of the sound waves, which is proportional to the flow velocity. The classification of ultrasonic flow meters includes:_600x400.jpg)
mmonly used tool for fluid flow measurement due to their flexibility and accuracy. 2. What is the working principle of natural gas pipeline ultrasonic flowmeter
The core working principle of natural gas pipeline ultrasonic flowmeter is to calculate the flow velocity and flow rate by measuring the time difference between the forward and backward propagation of ultrasonic waves in the flowing gas.
. 1. Basic measurement principle: Ultrasonic flow meters use the time difference method for measurement. Insert a pair of ultrasonic transducers (probes) diagonally at a certain angle on both sides of the pipeline, and they alternate as transmitters and receivers. Parallel propagation: When the ultrasonic signal flows in the same direction as the gas, its propagation speed will increase (the component of sound velocity+airflow velocity in the direction of the sound path). Counter current propagation: When the ultrasonic signal flows in the opposite direction to the gas, its propagation speed will slow down (sound velocity - the component of the airflow velocity in the direction of the sound path). The high-precision clock circuit will measure the forward time (t ₁) and backward time (t ₂) separately, and calculate the time difference Δ t=t ₂ - t ₁. The average flow velocity (V) of the fluid is directly proportional to the time difference Δ t, and combined with parameters such as the cross-sectional area of the pipeline, the working condition volume flow rate and the standard volume flow rate after temperature and pressure compensation can be calculated based on noise and slip. Piezoelectric ceramic materials are usually used, and their performance directly determines measurement accuracy and stability. High prec
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