Solution to edge effect of two-phase gas-liquid flow capacitive sensor

A capacitive sensor, gas-liquid two-phase flow technology, applied in the direction of material capacitance, etc., can solve the problems of difficult to determine the volume of fluid sensitive space, uneven sensitive field, measurement error, etc., and achieve simple structure, low cost and high sensitivity. Effect

Inactive Publication Date: 2004-04-07
沈阳工业学院
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous capacitive sensor research, the plate was assumed to be infinitely long, ignoring the edge effect, making the sensitive field uneven, affected by the flow pattern, making it difficult to determine the volume of the fluid sensitive space in the sensitive field, resulting in measurement errors; In the detection of multiphase flow, especially for the measurement of phase concentration, since the capacitance value of the capacitive sensor is small, between a few Pf to tens of Pf, the requirement for the unif...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Solution to edge effect of two-phase gas-liquid flow capacitive sensor
  • Solution to edge effect of two-phase gas-liquid flow capacitive sensor
  • Solution to edge effect of two-phase gas-liquid flow capacitive sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] As shown in the figure, the technical solution of the present invention and the solution to the edge effect of the capacitive sensor are further described in conjunction with the embodiments. A solution to the edge effect of a gas-liquid two-phase flow capacitive sensor. The two ends of the connecting pipe 6 of the sensor are respectively fixed with a flange 1 and a flange 5, and the pole plate tube 7 and the galvanized plate shield 8 are respectively fixed. Between the flange 1 and the flange 5, the capacitor plate 3 is arranged on the outer circle in the middle of the plate tube 7, and the two sides of the outer circle are respectively provided with a protective plate 2 and a protective plate 4, and the capacitor plate 3 The lead wire 9 of the capacitor plate is connected, and the shield cover 8 is connected with the lead wire 10 of the shield cover. The main parameters of the protective plate L and the opening angle θ of the arc-shaped plate are optimized and determi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention is solution to edge effect of two-phase gas-liquid flow capacitive sensor. The two-phase gas-liquid flow capactitive sensor is provided with protecting pole plates of optimal length L. The increase of length results in decreased influence of the edge effect but increased volume of the sensor, and the angle of the arced pole plate is 120-140 deg. The protecting plate length L and the angle of the arced pole plate, as the main parameters, are obtained via 3D electromagnetic field equi-parameter finite element algorithm including the steps of: start, unit separating, dielectric constant setting, rigid matrix synthesis, solving coupled equations and capacitor integration. The method of the present invention has simple structure, low cost, long life, high sensitivity and capacity of measuring flow rate, phase density and sliding ratio, and other advantages. The present invention is suitable for non-invasion measurement of two-phase gas-liquid flow in oil pipeline.

Description

technical field [0001] The invention relates to a capacitive sensor for oil field oil pipeline measurement, in particular to a method for solving the edge effect of a gas-liquid two-phase flow capacitive sensor. Background technique [0002] In the production of petroleum industry, the crude oil sprayed or extracted from oil wells is a multiphase flow, which contains crude oil, water, natural gas and mud sand, etc. Due to the different flow conditions of the pipeline, this multiphase flow may produce annular flow, Turbulent flow, core flow and other flow patterns, its metering problem is a very complicated problem. And its accurate measurement is an extremely important basis for oil production. For example, the measurement of oil-water content is the most important technical index for evaluating underground oil storage, extraction value, recovery degree and formulation of extraction plan. In the previous capacitive sensor research, the plate was assumed to be infinitely lon...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N27/22
Inventor 杨康
Owner 沈阳工业学院
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap