Ultrasonic flowmeter

Abstract

The invention discloses an ultrasonic flowmeter, which comprises: a measuring tube; an ultrasonic transmitting transducer located on the tube wall of the measuring tube for transmitting ultrasonic signals; at least two transducers located on the tube wall of the measuring tube An ultrasonic receiving transducer is used to receive the ultrasonic signal transmitted by the ultrasonic transmitting transducer. In the present invention, the ultrasonic transmitting transducer is only used to transmit ultrasonic signals, and the ultrasonic receiving transducer is only used to receive the ultrasonic signals emitted by the ultrasonic transmitting transducer. For signal transmitting and receiving functions, the circuit processing of the ultrasonic flowmeter provided by the present invention is more flexible and the control is simpler. In addition, because the present invention arranges at least two ultrasonic receiving transducers to receive the ultrasonic signals emitted by the same ultrasonic transmitting transducer to calculate the flow velocity of the medium flowing through the measuring tube, it can largely avoid the problems caused by large time intervals. The change of the flow state makes the signal detection more accurate.

Description

technical field [0001] Embodiments of the present invention relate to measurement technology, and in particular to an ultrasonic flowmeter. Background technique [0002] Ultrasonic is widely used in gas and fluid flow rate measurement. Compared with traditional mechanical flowmeters and electromagnetic flowmeters, ultrasonic flowmeters have high measurement accuracy, strong adaptability to pipe diameters, non-contact fluids, and use Convenient, easy digital management and other advantages. [0003] At present, ultrasonic flowmeters mainly measure low flow rates on the market, that is, ultrasonic flowmeters with a flow rate below 60m / s, which leads to excessive gas flow rates (usually above 100m / s) in the case of flare gas and high compressed gas pipelines. It is difficult to use an ultrasonic flowmeter; the traditional high-speed gas meter has disadvantages such as pressure loss and movable parts, which make the measurement accuracy low and its application is greatly limite...

AI Technical Summary

Problems solved by technology

[0003] At present, ultrasonic flowmeters mainly measure low flow rates on the market, that is, ultrasonic flowmeters with a flow rate below 60m / s, which leads to excessive gas flow rates (usually above 100m / s) in the case of flare gas and high compressed gas pipelines. It is difficult to use an ultrasonic flowmeter; the traditional high-speed gas meter has disadvantages such as pressure loss and movable parts, which make the measurement accuracy low and its application is greatly limited

Images