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Can an ultrasonic flowmeter measure gas flow rate and what is the principle of an ultrasonic flowmeter?
1. Currently, domestically produced ultrasonic flow meters use 1MHz and cannot propagate gas as a medium, so they cannot measure. 2. Principle of Ultrasonic Flow Meter: In the process of measuring the flow state of a fluid, the propagation speed of ultrasonic waves in the upstream is slightly smaller than that in the downstream. In the case of a constant pipe diameter, the flow velocity is proportional to the time difference. The host of the ultrasonic flow meter calculates the flow velocity (display 1) based on this time difference, and the flow velocity X cross-sectional area=flow rate (display 2).
2. Working principle of gas ultrasonic flowmeter
The FLEXIM G series gas ultrasonic flowmeter, as an ideal tool for precise measurement of high-pressure gas, has a unique and efficient working principle.
. Compared to conventional measurement methods, especially when dealing with large caliber flow, it significantly saves costs. One major advantage of its design is its wide range ratio, which can accurately measure gas flow rates with extremely low flutter and tear, demonstrating extremely high flexibility. This flow meter from Qijia follows the ISO12213-1 standard and integrates a flow computer internally. Through accurate temperature and pressure compensation functions, it can achieve accurate conversion of standard flow rate. Among them, the K probe adopts a high-frequency excitation of 500KHz, which is particularly suitable for measuring gases and liquids with high sound consumption. However, whether clamping measurement can be achieved will be directly affected by the level of sound consu
3. 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
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