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Multiple parameter measurement device and method for small caliber and small flow fluid

A measurement method and measurement device technology, which is applied in the direction of detecting fluid flow by measuring pressure difference, determining specific gravity by measuring pressure difference, volume/mass flow generated by mechanical effects, etc., and can solve the problem of fluid measurement accuracy of small pipe diameter and small flow rate Problems such as failure to meet the requirements, single measurement parameters, and increased costs have achieved the effect of simple structure, high measurement accuracy, and improved measurement accuracy

Inactive Publication Date: 2004-09-08
桂林电子工业学院
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AI Technical Summary

Problems solved by technology

However, the accuracy of small-diameter and small-flow fluid measurement is still not up to the requirement, and the device is more complicated and thus more expensive
[0004] In addition, the measurement parameters obtained by the existing flow measurement devices and methods are single. If multiple parameters are to be measured at the same time, sensors must be added, which will inevitably further increase the cost.

Method used

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  • Multiple parameter measurement device and method for small caliber and small flow fluid
  • Multiple parameter measurement device and method for small caliber and small flow fluid
  • Multiple parameter measurement device and method for small caliber and small flow fluid

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Embodiment Construction

[0021] Such as figure 1 As shown, the multi-parameter measurement device for fluid with small diameter and small flow rate designed by the present invention includes a measuring tube 2 , pressure sensors 5 and 8 , a sampling card 6 and a computer data processing system 7 . An upper pressure sensor A9 and a lower pressure sensor B5 are installed on the wall of the vertical measuring tube 2 , the lower part of the measuring tube 2 has an outlet pipe 3 , and a valve 4 is installed on the outlet pipe 3 . The height of the outlet pipe 3 is equal to the height of the downforce sensor B5, that is, the centerlines of the two are on the same horizontal plane. The upper pressure sensor A9 and the lower pressure sensor B5 are connected with the sampling card 6, and the sampling card 6 is connected with the computer 7. The fluid pipe 1 to be measured is connected from the top of the measuring pipe 2 and connected out from the outlet pipe 3 below.

[0022] The upper pressure sensor A9 an...

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Abstract

The multiple parameter measurement device has vertical measuring tube, two, one upper and one lower, pressure sensors installed onto the wall of the vertical measuring tube and outlet tube with valve connected to the lower part of the measuring tube. The two pressure sensors are connected to sampling card and computer. The measured fluid is made to flow through the measuring tube from top to bottom. During measurement, the measured fluid is made first to fill the measuring tube with liquid level over the upper pressure sensor; valve is regulated to proper opening to maintain the dynamic balance between the flow-in and flow-out fluid; and the two pressure sensors measure the real-time pressure values, which are converted into digital signal and fed to computer to obtain measurement result of mass flow rate, volume flow rate and density. The present invention is suitable for measurement of fluid in small tube and in small flow rate.

Description

(1) Technical field [0001] The invention relates to a fluid measuring device and method, in particular to a multi-parameter measuring device and method for small-diameter and low-flow fluids. (2) Technical background [0002] Modern industries, such as chemical industry production process monitoring, often need to measure fluid mass flow, volume flow, density and other parameters. For the measurement of fluid parameters with small pipe diameter and small flow rate, it is a difficult point in flow measurement. Although turbine, float, electromagnetic or hot wire flowmeters can be used for small flow measurement, because this type of flowmeter uses mechanical parts to measure the dynamic effect of the fluid passing through the meter, or a connecting pipe that uses the flow pressure difference to measure Or film, piston and other special equipment, not only the production and installation are strictly required, but also the measurement accuracy is limited, which cannot meet th...

Claims

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Application Information

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IPC IPC(8): G01F1/34G01N9/26
Inventor 谭永红陈辉党选举
Owner 桂林电子工业学院
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