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

Abstract

The multi-parameter measuring device for small-diameter and small-flow fluids is provided with two pressure sensors on the wall of a vertical measuring tube, and an outlet tube with a valve at the lower part of the measuring tube. The pressure sensors A and B are connected with the sampling card and the computer. The fluid to be measured enters from the top of the measuring tube and comes out from the outlet tube. In this measurement method, the fluid to be measured is first filled into the measuring tube, the liquid level is higher than the height of the upper pressure sensor, and the valve is adjusted to keep the fluid in and out basically balanced, and the valve maintains this opening; the upper and lower pressure sensors measure the real-time pressure value; after sampling The card is converted into a digital signal and sent to the computer; the result is obtained. Realize the dynamic real-time measurement of mass flow, volume flow, and density multi-parameters; it is suitable for fluid measurement with small diameter and small flow, and there is no requirement for whether the fluid is full; it has high measurement accuracy, fast response, and no wear; it is not affected by fluid State influence; wavelet transform filter processing, eliminate interference; scalable and transplantable.

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...

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.

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