The Working Principle of Wall-Mounted Ultrasonic Flowmeter

 Introduction:

 

The wall mounted ultrasonic flowmeter is a kind of instrument that uses ultrasonic technology to measure the flow velocity and flow rate of the fluid in the pipeline. It adopts a non-contact measurement method and can be applied to a variety of fluid media, especially for transparent or non-transparent, corrosive, conductive liquids have a wide range of applicability. This paper will introduce the working principle of wall-mounted ultrasonic flowmeter in detail.

 

Working Principle

 

1. Ultrasonic Beam Propagation

Wall-mounted ultrasonic flowmeters emit ultrasonic beams through sensors that propagate into the fluid at a certain Angle and frequency. When the ultrasonic beam encounters suspended particles or bubbles in the fluid, it reflects and scatters. Part of the reflected beam returns to the sensor and is picked up by the receiver.

 

2.  Velocity and Time Change

The propagation speed of ultrasonic beam in fluid is directly related to the velocity of fluid. When the fluid is flowing, the propagation speed of the ultrasonic beam in the forward direction and the reverse direction will be different. This is because the flow of the fluid changes the path and speed of the ultrasonic beam in the fluid. The velocity of the fluid can be calculated by measuring the difference in the propagation time of the ultrasonic beam in the forward and reverse direction.

 

3. Differences in Downstream and Counter-Flow Propagation

Wall-mounted ultrasonic flow meters emit ultrasonic beams and measure the propagation time in the downstream and counter-flow directions. Due to the influence of fluid flow, the propagation time in the downstream direction will be shorter than in the countercurrent direction. This time difference is proportional to the flow rate of the fluid. By accurately measuring this time difference, the flow rate of the fluid can be calculated.

 

4. Transmission and Reception Processing

The sensor is responsible for emitting ultrasonic beams and receiving reflected waves. The received reflected wave signal will be amplified, filtered and digitized to improve the signal-to-noise ratio and stability of the signal. Then, the processed signals are analyzed and calculated through specialized algorithms to obtain the fluid flow rate and flow data.

 

5. Data Output Application

The processed and analyzed flow rate and flow data can be applied through different output methods. Common output modes include digital display, analog signal output, data communication and so on. Digital display can directly view the measurement results on the instrument; Analog signal output can connect data to other control systems or instruments; Data communication can realize remote data transmission and monitoring.

Conclusion:

Wall-mounted ultrasonic flowmeters take advantage of the propagation characteristics of ultrasonic beams in a fluid to measure velocity and flow. By transmitting the ultrasonic beam and measuring the difference in its propagation time in the downstream and counter-flow directions, the flow velocity of the fluid can be accurately calculated. At the same time, through transmitting and receiving processing and data output application, the real-time monitoring and control of velocity and flow can be realized conveniently. Wall-mounted ultrasonic flowmeter has the advantages of non-contact measurement, high measurement accuracy, wide application range, etc., and has a wide application prospect in industrial production, environmental monitoring and other fields.

 

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