Acoustoelectric bimodal fusion measuring method of two-phase flow process parameters

A technology of process parameters and measurement methods, applied in fluid velocity measurement, measurement device, velocity/acceleration/impact measurement, etc., can solve the problem of inability to obtain an accurate and comprehensive description of multiphase flow, many parameters to be measured, and the difficulty of accurate parameter testing. And other issues

Active Publication Date: 2017-09-12
TIANJIN UNIV
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Problems solved by technology

[0002] Multiphase flow exists widely in nature and industrial production. The flow process of multiphase flow is complicated, and there are many parameters to be measured, which is difficult to describe with an accurate model. Therefore, it is very difficult to accurately test its parameters.
A single sensor is often only suitable for some parameter tests under a certain type of flow state, and cannot obtain an accurate and comprehensive description of multiphase flow

Method used

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  • Acoustoelectric bimodal fusion measuring method of two-phase flow process parameters
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  • Acoustoelectric bimodal fusion measuring method of two-phase flow process parameters

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Embodiment Construction

[0074] Conductivity sensor structure such as figure 1 As shown, it consists of six annular electrodes arranged in the axial direction, among which 1, 6 are excitation electrodes, and 2, 3, 4, 5 are measurement electrodes. The method of current excitation voltage measurement is adopted. The excitation signal is a square wave signal with a frequency of 20kHz. By injecting a constant current into electrode 1 and grounding electrode 6, a stable electrical measurement field can be formed between electrodes 1 and 6. The potential difference between them is proportional to the fluid impedance distributed therebetween, and the average resistivity of the two-phase flow between them can be obtained by measuring the potential difference between the electrode pair 2-3, the electrode pair 3-4 and the electrode pair 4-5 respectively. The impedance of the oil-water two-phase flow has a corresponding relationship with the phase distribution, so the phase holdup can be measured by measuring th...

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Abstract

The invention relates to an acoustoelectric bimodal fusion measuring method of two-phase flow process parameters. The method includes: arranging a conductivity sensor and a capacitance sensor on a measuring pipeline, and arranging an ultrasonic sensor on the measuring pipeline; extracting flow rate characteristic quantity from data measured by the conductivity sensor as related flow rate; acquiring Doppler flow rate from data measured by the ultrasonic sensor; respectively performing state estimation on water content acquired by utilizing the capacitance sensor for measuring and water content acquired by the conductivity sensor; fusing the capacitance water content and the conductivity water content; respectively performing state estimation on the Doppler flow rate and the related flow rate; respectively performing Kalman estimation on the flow rates acquired by measuring based on two principles, and calculating flow rate state estimation at all moments; fusing the Doppler flow rate and the related flow rate.

Description

technical field [0001] The invention belongs to the technical field of fluid measurement and relates to a method for measuring two-phase flow process parameters. technical background [0002] Multiphase flow exists widely in nature and industrial production. The flow process of multiphase flow is complicated, and there are many parameters to be measured, so it is difficult to describe it with an accurate model. Therefore, it is very difficult to accurately test its parameters. A single sensor is often only suitable for some parameter tests under a certain type of flow state, and cannot obtain an accurate and comprehensive description of multiphase flow. If the multi-sensor data fusion technology is introduced into the multiphase flow measurement, and the information obtained by multiple sensors is analyzed and comprehensively utilized, more comprehensive and reliable parameter information can be obtained than a single sensor. [0003] Phase holdup and flow rate (velocity) a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/08G01P5/22G01P5/24
CPCG01N27/08G01P5/22G01P5/242
Inventor 谭超付广智董峰
Owner TIANJIN UNIV
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