Ultrasonic flowmeter

Abstract

The invention discloses an ultrasonic flowmeter which comprises a measuring pipe, one ultrasonic transmitting transducer and at least two ultrasonic receiving transducers, wherein the ultrasonic transmitting transducer is located on a pipe wall of the measuring pipe and is used for transmitting an ultrasonic signal and the ultrasonic receiving transducers are located on the pipe wall of the measuring pipe and are used for receiving the ultrasonic signal transmitted by the ultrasonic transmitting transducer. In the invention, the ultrasonic transmitting transducer is only used for transmitting the ultrasonic signal and the ultrasonic receiving transducers are only used for receiving the ultrasonic signal transmitted by the ultrasonic transmitting transducer. Compared with the ultrasonic transducer which has the function of transmitting and receiving the ultrasonic signal in the prior art, the ultrasonic flowmeter provided by the invention is more flexible in circuit treatment and simpler in control. Besides, the flow rate of the medium passing by the measuring pipe is calculated in the manner of arranging at least two ultrasonic receiving transducers for receiving the ultrasonic signal transmitted by the same ultrasonic transmitting transducer according to the invention, the flow state change caused by larger time interval can be greatly avoided and the signal detection is 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

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