Gas flow measuring device, system and method based on ultrasonic waves

A technology for gas flow and measuring device, applied in measuring device, measuring flow/mass flow, liquid/fluid solid measurement, etc., can solve problems such as complex overall structure, achieve simple installation and operation, reduce measurement error, and good practicability Effect

Pending Publication Date: 2022-02-08
SUZHOU UNIV
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Problems solved by technology

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  • Gas flow measuring device, system and method based on ultrasonic waves
  • Gas flow measuring device, system and method based on ultrasonic waves
  • Gas flow measuring device, system and method based on ultrasonic waves

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[0040] Example one

[0041] See Figure 1 to 5As shown in the illustration of which a gas flow measuring device based on ultrasound, comprising an ultrasonic measuring in a gas duct downstream of the plurality of ultrasonic probes and counter propagation time and a propagation time for calculating the flue gas the cross-sectional average velocity data processing terminal 2, the data processing terminal is calculated using the following formula 2 a cross-sectional average flow velocity within the gas conduit:

[0042]

[0043] Among them, Q v It is a cross-sectional average velocity of the gas pipeline; [pi] is pi; D is the pipe diameter; ultrasonic propagation velocity C of the gas in the pipeline; installation angle [alpha] is an ultrasonic probe;

[0044] K is the flow rate correction factor,

[0045] Kc correction factor for the speed of sound, c0 of 340m / s, one atmosphere, the sound velocity at 15 deg.] C air medium; c (T, p) corresponding to the temperature field, the av...

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Abstract

The invention discloses a gas flow measuring device, system and method based on ultrasonic waves. The gas flow measuring device comprises a plurality of ultrasonic probes and a data processing terminal, wherein the ultrasonic probes are used for measuring downstream propagation time and countercurrent propagation time of the ultrasonic waves in gas in a pipeline, and the data processing terminal is used for calculating the average flow velocity of the cross section of the gas in the pipeline. Based on the analysis of the influence of the flow field and the temperature field in the air compressor pipeline on the sound velocity and the path thereof, the flow velocity correction coefficient and the sound velocity correction coefficient are introduced to obtain the accurate average flow velocity of the cross section, the measurement error of the ultrasonic flowmeter is reduced, and the non-contact online accurate measurement of the air flow of the air compressor is realized. The method provided by the invention does not interfere with a flow field in the pipe, is simple to install and operate, is easy to maintain, and has good implementability.

Description

technical field [0001] The invention belongs to the technical field of fluid flow measurement, and in particular relates to an ultrasonic-based gas flow measurement device, measurement system and measurement method. Background technique [0002] The information disclosed in this Background section is only intended to enhance the understanding of the general background of the present invention, and should not be considered as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Ultrasonic flowmeter is based on the propagation of ultrasonic waves in the flowing medium, measures the corresponding physical quantities through the characteristics of ultrasonic waves, and then obtains the fluid flow in the pipeline through related signal processing and data calculation. In actual production and life, the biggest disadvantage of ultrasonic flowmeters is that the measurement accuracy is ...

Claims

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Application Information

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IPC IPC(8): G01F1/667
CPCG01F1/668
Inventor 蔡琦琳赖昶志吴玺舒悦刘晓明叶庆庞昊强
Owner SUZHOU UNIV
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