CN108398465A - A kind of high-voltage capacitance sensor array - Google Patents

A kind of high-voltage capacitance sensor array Download PDF

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Publication number
CN108398465A
CN108398465A CN201810096034.3A CN201810096034A CN108398465A CN 108398465 A CN108398465 A CN 108398465A CN 201810096034 A CN201810096034 A CN 201810096034A CN 108398465 A CN108398465 A CN 108398465A
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CN
China
Prior art keywords
array
tube
electrode
bearing
pressure
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Pending
Application number
CN201810096034.3A
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Chinese (zh)
Inventor
孙世杰
徐立军
曹章
何玉珠
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Beihang University
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Beihang University
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Publication date
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Priority to CN201810096034.3A priority Critical patent/CN108398465A/en
Publication of CN108398465A publication Critical patent/CN108398465A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/226Construction of measuring vessels; Electrodes therefor

Abstract

The present invention relates to a kind of high-voltage capacitance sensor arrays, it is characterised in that includes mainly five parts:It is characterized in that including mainly five parts:Metal shell is used for pressure-bearing and external shield;Polytetrafluoroethylene (PTFE) inner tube, inside are tested field domain, and outer surface is used to support electrod-array;Solid gum, between perfusion and metal shell and polytetrafluoroethylene (PTFE) inner tube, for sealing and pressure-bearing;Electrod-array is fixed on polytetrafluoroethylene (PTFE) outer wall of inner tube by solid gum;Lead wire outlet, for drawing shielding line, signal wire one end connection electrode array in shielding line, one end connects measuring circuit, shielding part tap metal shell and is grounded in shielding line;Shielding line quantity is identical as number of electrodes.

Description

A kind of high-voltage capacitance sensor array
Technical field
The present invention relates to a kind of high-voltage capacitance sensor arrays, belong to sensor technical field.
Background technology
As a kind of realization method of process tomographic imaging technology, electricity chromatography imaging technique is with two phase flow or multiphase Stream is detection object, mainly by the method for electrical measurement come the real-time detection technique of research process parameter distribution.The technology is logical The anti-value of interelectrode capacitance/resistance measured mounted on unknown container or pipe surface is crossed, container or pipeline can be reconstructed Inside dielectric constant/distribution of conductivity, to quickly, nondestructively obtain dielectric distribution situation inside unknown container.With biography The fault parameters acquiring technology of system is compared, and the major advantage of electricity chromatography imaging technique is mainly reflected in following several respects:1) energy Online two dimension or three-dimensional visualization information are provided;2) dielectric constant or distribution of conductivity letter inside measurand be can extract Breath;It is radiationless, safe and harmless;3) non-intruding does not destroy determinand field distribution;4) it responds fast, real-time;It is 5) simple in structure, It is of low cost.As one kind of electricity chromatography imaging technique, electrical capacitance tomography is mounted on tested region side by measurement Capacitance between each electrode pair on boundary can calculate Jie inside tested region by means of image reconstruction algorithm appropriate Electric constant is distributed, and then obtains corresponding substance distributed intelligence.Currently, ECT technologies have been widely used in the survey of industrial process Amount and monitoring, such as the visualization of gas-particle two-phase concentration distribution, oil in measuring gas-liquid two-phase flow porosity and Flow Regime Ecognition, fluid bed The detection of pipeline operating mode, flame visualization monitoring, water hammer process monitoring in the visualizing monitor of frozen soil water translocation process, pipeline, The solid fuel bar internal flaw that monitoring rocket uses, the monitoring and imaging of nylon polymerization process, gas when being increased with temperature, pressure Water separating and measuring, the fields such as blast furnace material visualizing monitor.
Typical capacitance tomography system includes mainly three parts:1) capacitance for being tested object field electrical parameter information is obtained Sensor array.Under the excitation of constant voltage source, the sky for being tested object field can be scanned from different observation angles by forming one for it Between sensitivity field, the motion change of tested object field interior media distribution or structure acts sensitivity field, and capacitor array is made to sense Device exports corresponding signal.2) data acquisition and procession unit.Its task is to acquire capacitive array sensor output in real time Reaction is tested the measurement data of object field dielectric distribution state, the tasks such as driving source generation, signal filtering and demodulation is completed, to obtain The directly electrical parameter information of reaction measured object field distribution variation.3) image reconstruction and measured object field parameters extraction unit (image weight Build computer).
Sustainable development with electrical capacitance tomography and maturation, application range is also increasingly wider, towards minute yardstick, The directions such as large scale are developed, and application environment also contains the adverse circumstances such as high temperature, high pressure.Traditional capacitive array sensor is by dividing Electrod-array composition of the cloth around object field to be measured, in order to mask influence of the measured object field exterior materials to sensor signal, Need around sensor be added shielding shell, sensor axis to both ends add guard electrode, shell and guard electrode are equal Ground connection.However, when being hyperbaric environment applied to tested object field, traditional capacitive array sensor production method be not applicable in, Need the high-voltage capacitance sensor array of design specialized.
Invention content
The technology of the present invention solves the problems, such as:For the deficiency of traditional capacitance sensor array, it is proposed that a kind of high-voltage capacitance Sensor array, allowable stress are the tested object field of 10 megapascal.
Technical solution of the invention:A kind of high-voltage capacitance sensor array, it is characterised in that include mainly five portions Point:Metal shell is used for pressure-bearing and external shield;Polytetrafluoroethylene (PTFE) inner tube, inside are tested field domain, and outer surface is used to support electrode Array;Solid gum, between perfusion and metal shell and polytetrafluoroethylene (PTFE) inner tube, for sealing and pressure-bearing;Electrod-array, by solid Glue is fixed on polytetrafluoroethylene (PTFE) outer wall of inner tube;Lead wire outlet, for drawing shielding line, signal wire one end connection electrode battle array in shielding line Row, one end connect measuring circuit, and shielding part taps metal shell and is grounded in shielding line;Shielding line quantity and number of electrodes phase Together.Characterized by further comprising:Large flange, bolt, nut, for fixing metal shell;Small flange, for fix sensor and Main line;Encapsulating mouth is sealed and pressure-bearing for pouring into solid gum;Seal plug, for fixed and pressure-bearing;Short tube, for connecting Connect large flange and small flange.
The basic principle of the present invention:Electrod-array includes measuring electrode and bucking electrode, and measuring electrode is axially divided along inner tube It it is two groups, every group is uniformly distributed N number of metal electrode, two arrays of electrodes centre and both ends setting total of three axial shield electrode and connects Ground.
The present invention compared with prior art the advantages of:
1) allowable stress is the tested object field of 10 megapascal;
2) two arrays of electrodes array is set, correlation speed measurement is can be applied to;
3) electrode is fixed using solid gum, no movable member, and stability is strong.
Description of the drawings
Fig. 1 is the design drawing of the present invention;
Fig. 2 is electrod-array distribution map.
Specific implementation mode
As shown in Figure 1, a kind of high-voltage capacitance sensor array, it is characterised in that include mainly five parts:Metal shell, For pressure-bearing and external shield;Polytetrafluoroethylene (PTFE) inner tube, inside are tested field domain, and outer surface is used to support electrod-array;Solid gum, Between perfusion and metal shell and polytetrafluoroethylene (PTFE) inner tube, for sealing and pressure-bearing;Electrod-array is fixed on poly- four by solid gum Vinyl fluoride outer wall of inner tube;Lead wire outlet, for drawing shielding line, signal wire one end connection electrode array in shielding line, one end connection Measuring circuit shielding part tap metal shell and is grounded in shielding line;Shielding line quantity is identical as number of electrodes.It is characterized in that Further include:Large flange, bolt, nut, for fixing metal shell;Small flange, for fixing sensor and main line;Encapsulating Mouthful, it is sealed and pressure-bearing for pouring into solid gum;Seal plug, for fixed and pressure-bearing;Short tube, for connecting large flange and small Flange.
As shown in Fig. 2, electrod-array is divided axially into two groups along inner tube, every group is uniformly distributed N number of metal electrode, two arrays of electrodes Intermediate and both ends setting total of three axial shield electrode is simultaneously grounded.Make using with sticking copper foil gummed paper in present embodiment To make the material of electrode.Specific make step is as follows:
1) outer diameter of polytetrafluoroethylene (PTFE) inner tube is measured with vernier caliper, is then determined according to the electrode data of sensor Gap between the width and adjacent electrode of each electrode;
2) sticky copper foil paper electrode is cut into required size with paper knife, it is uniformly sticked to pipe later one week;
3) sticky copper foil is used to put up three annulus as bucking electrode, to even on the left side of electrode zone, middle part, the right The shielded layer of receiving electrode lead (coaxial cable), and be finally connected with sensor external ground shield;
4) on the electrode by the welding of the core of coaxial cable, on the shield electrode by shielded layer welding;
5) electrode is wrapped with solid insulation glue.
In addition, the above-mentioned definition to each element and method is not limited in the various concrete structures mentioned in embodiment, shape Shape or mode, those of ordinary skill in the art can simply change or replace, such as:Electrode material, inner tube material etc..
Above to the description of the present invention and embodiments thereof, it is not limited to which this, is only the reality of the present invention shown in attached drawing Apply one of mode.Without departing from the spirit of the invention, similar with the technical solution without creatively designing Structure or embodiment, belong to the scope of the present invention.

Claims (2)

1. a kind of high-voltage capacitance sensor array, it is characterised in that include mainly five parts:Metal shell, for pressure-bearing and outside Shielding;Polytetrafluoroethylene (PTFE) inner tube, inside are tested field domain, and outer surface is used to support electrod-array;Solid gum, perfusion with metal outside Between shell and polytetrafluoroethylene (PTFE) inner tube, for sealing and pressure-bearing;Electrod-array, including measuring electrode and bucking electrode measure electricity Pole is divided axially into two groups along inner tube, and every group is uniformly distributed N number of metal electrode, and total of three axis is arranged in two arrays of electrodes centre and both ends It to bucking electrode and is grounded, polytetrafluoroethylene (PTFE) outer wall of inner tube is fixed on by solid gum;Lead wire outlet is shielded for drawing shielding line Signal wire one end connection electrode array in line, one end connect measuring circuit, and shielding part taps metal shell and is grounded in shielding line; Shielding line quantity is identical as number of electrodes.
2. a kind of high-voltage capacitance sensor array according to claim 1, it is characterised in that further include:Large flange, bolt, Nut, for fixing metal shell;Small flange, for fixing sensor and main line;Encapsulating mouth is carried out for pouring into solid gum Sealing and pressure-bearing;Seal plug, for fixed and pressure-bearing;Short tube, for connecting large flange and small flange.
CN201810096034.3A 2018-01-31 2018-01-31 A kind of high-voltage capacitance sensor array Pending CN108398465A (en)

Priority Applications (1)

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CN201810096034.3A CN108398465A (en) 2018-01-31 2018-01-31 A kind of high-voltage capacitance sensor array

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Application Number Priority Date Filing Date Title
CN201810096034.3A CN108398465A (en) 2018-01-31 2018-01-31 A kind of high-voltage capacitance sensor array

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109900753A (en) * 2019-02-27 2019-06-18 北京航空航天大学 A kind of high temperature resistant capacitive array sensor based on plasma surface processing technology

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CN101477075A (en) * 2008-11-06 2009-07-08 东北大学 Capacitance-type sensor and two-phase flow phase-concentration detection apparatus
CN101876644A (en) * 2010-05-06 2010-11-03 西安交通大学 Sensing device used for monitoring pulverized coal concentration
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WO2015118332A1 (en) * 2014-02-07 2015-08-13 Industrial Tomography Systems Plc Measurement device and method
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Publication number Priority date Publication date Assignee Title
CN109900753A (en) * 2019-02-27 2019-06-18 北京航空航天大学 A kind of high temperature resistant capacitive array sensor based on plasma surface processing technology

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