Method for measuring quality and flow of light oil product by using ultrasonic waves

A technology of mass flow and light oil, which is applied in the field of pipeline transportation, ultrasonic mass flow measurement of light oil, and mass flow measurement during filling, which can solve the problems of inconvenient accurate measurement and improve the accuracy of measurement Effect

Inactive Publication Date: 2014-12-24
中国人民解放军空军勤务学院
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Problems solved by technology

[0010] This method needs to input the standard density of each batch of oil, and look up the oil density correction coefficient according to the density range, which brings inconvenience to accurate measurement

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  • Method for measuring quality and flow of light oil product by using ultrasonic waves
  • Method for measuring quality and flow of light oil product by using ultrasonic waves
  • Method for measuring quality and flow of light oil product by using ultrasonic waves

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Embodiment Construction

[0032] According to existing literature, in ultrasonic mass flow measurement, its fluid mass flow q m It can be obtained by formula (1): q m =ρq v =ρAu (1);

[0033] Where q m Is the mass flow rate (kg / S), q v Is the volume flow (L / S), ρ is the oil density (Kg / L), A is the cross-sectional area of ​​the ultrasonic measuring pipe (cm 2 ), u is the average flow velocity of the fluid interface (cm / S).

[0034] In the present invention, the cross-sectional average flow rate is measured by the plug-in time difference method. The technical method can be seen in the well-known ultrasonic flow measurement method and technology, which is outside the scope of the present invention. Here, the ultrasonic density measurement method is mainly described.

[0035] The ultrasonic density measurement method is as follows: first use the upstream and downstream ultrasonic delay of the existing time delay ultrasonic flowmeter to calculate the ultrasonic propagation velocity c of the static medium, and then...

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Abstract

The invention discloses a method for measuring quality and flow of a light oil product by using ultrasonic waves and relates to the technical field of measuring on quality and flow of the light oil product. According to the invention, the relation among the density, sound velocity and temperature of the light oil product is generalized by using experiment data, and the density of the light oil product flowing in a pipeline can be directly obtained by measuring the speed and temperature with the ultrasonic waves. On the basis of the density measuring, volume and flow are measured by using a time-difference method, so the quality and flow of the light oil product are calculated. The method has the advantages that the measuring precision is improved and the maximal relative error is not greater than 0.24%.

Description

Technical field [0001] The invention relates to the technical field of light oil quality flow measurement, in particular to a method for measuring light oil quality flow using ultrasonic waves, which is mainly used for pipeline transportation of light product oil and mass flow measurement during filling. Background technique [0002] Ultrasonic flowmeter is a meter that measures the flow of fluid by detecting the effect of ultrasonic pulse on fluid flow. The ultrasonic flowmeter does not need to install the measuring element in the fluid, so it will not change the flow state of the fluid and does not produce additional resistance. It is an ideal energy-saving flow measurement method. [0003] When the ultrasonic wave propagates in the flowing fluid, it carries the information of the fluid velocity. Therefore, the fluid velocity can be detected by the received ultrasonic wave and converted into the flow rate. Ultrasonic flowmeters can be roughly divided into propagation velocity me...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/86
Inventor 张晓钟孟凡芹宋生奎朱江耿光辉王杰辉
Owner 中国人民解放军空军勤务学院
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