Non-contact type fluid flow measuring system and method based on Lamb waves

A fluid flow, non-contact technology, used in liquid/fluid solid measurement, measurement flow/mass flow, measurement devices, etc., can solve problems such as time-consuming, complicated, allergic reactions, etc., to improve accuracy and signal strength. , the effect of saving manpower and material costs

Active Publication Date: 2016-11-23
SOUTHWEST UNIVERSITY
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Problems solved by technology

However, in the process of using the couplant, it needs to be selected according to the temperature of the site working conditions and the time limit of use, and the following issues also need to be paid attention to: such as the amount of application, whether the air bubbles are removed, the dust in the environment, and the user's attention to it. Allergic reactions, etc. Therefore, if you want to use the coupling agent reasonably, you need to do a lot of complicated and time-consuming preparations in the early stage

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  • Non-contact type fluid flow measuring system and method based on Lamb waves
  • Non-contact type fluid flow measuring system and method based on Lamb waves
  • Non-contact type fluid flow measuring system and method based on Lamb waves

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing and embodiment: figure 1 It is a schematic diagram of the principle of the present invention; figure 2 It is a schematic diagram of the measurement signal delay principle of the present invention under countercurrent conditions; image 3 It is a schematic diagram of the measurement signal delay principle in the downstream condition of the present invention.

[0027] Such as figure 1 As shown, the non-contact fluid flow measurement system based on Lamb waves in this embodiment includes transducer I1, transducer II2 and a processor, and the transducer I1 and transducer II2 are respectively arranged in the pipeline under test The external side is on the opposite side and the working surface is not in contact with the pipe under test. The working surface refers to the surface of the transducer transmitting end or receiving end. Transducer Ⅰ1 is used as the ultrasonic transmitti...

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Abstract

The invention provides a non-contact type fluid flow measuring system and method based on Lamb waves. The system comprises a transducer I, a transducer II and a processor. The transducer I and the transducer II are arranged on the different sides of the outer portion of a to-be-measured pipeline respectively, and working surfaces do not make contact with the to-be-measured pipeline. By changing the transmission direction of ultrasonic waves, the flow speed of fluid flow obtained in two times in a Lamb wave signal obtaining pipe is obtained; the pipeline does not need to be opened, a coupling agent is omitted, the flow speed is directly reflected, the complex machining and the interrupting of field work are not needed in the installation process, the use of the coupling agent is completely avoided, labor and material cost are saved, measuring accuracy is improved, and the efficient fluid flow measuring system has important market economic value.

Description

technical field [0001] The invention relates to the field of industrial automation detection, in particular to a non-contact fluid flow measurement system and method based on Lamb waves. Background technique [0002] The ultrasonic flowmeter is based on the "velocity difference method" as the principle to measure the liquid flow in the circular tube. It adopts multi-pulse technology, signal digital processing technology and error correction technology, so that the flow meter can better adapt to the environment of the industrial site, and the measurement is more convenient, economical and accurate. The products have reached the advanced level at home and abroad, and can be widely used in petroleum, chemical industry, metallurgy, electric power, water supply and drainage and other fields. Among them, the clip-on ultrasonic flowmeter has the advantages of portability and reliability, and its installation process does not require complicated machining and technology. In additio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66
CPCG01F1/66
Inventor 范子川
Owner SOUTHWEST UNIVERSITY
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