1.Ultrasonic propagation characteristics:
Wall-mounted ultrasonic flow meter based on the propagation characteristics of ultrasonic waves in fluids.
By emitting ultrasonic beams through sensors into the fluid, the beams propagate at a specific speed within the fluid.
When the fluid flows, there will be a difference in the propagation speed of ultrasonic waves in the forward and backward directions. This is because fluid flow affects the propagation path and velocity of ultrasonic waves.
2.Time difference measurement calculates flow velocity:
Wall-mounted ultrasonic flow meter accurately measures the propagation time of ultrasonic waves in both the forward and reverse directions.
Due to the short propagation time in the forward direction and the short duration in the reverse direction, this time difference is proportional to the fluid flow velocity.
By measuring the time difference and using a specific formula, the flow velocity of the fluid can be calculated. For example, in a certain pipeline, the forward propagation time is t1 and the backward propagation time is t2. Given that the sound velocity of ultrasound in a stationary fluid is c and the diameter of the pipeline is D, the flow velocity v=D * (c ²/(t2- t1))/2.
3.Signal processing yields flow:
The Sensors of wall-mounted ultrasonic flow meter receive reflected ultrasonic signals, which are amplified, filtered, digitized, and processed to improve signal quality.
Subsequently, the processed signal is analyzed using specialized algorithms, combined with the calculated flow velocity and pipeline cross-sectional area parameters, to ultimately obtain the fluid flow rate data.