CN109580729A - A kind of capacitance chromatographic sensor detecting system - Google Patents
A kind of capacitance chromatographic sensor detecting system Download PDFInfo
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- CN109580729A CN109580729A CN201811440799.0A CN201811440799A CN109580729A CN 109580729 A CN109580729 A CN 109580729A CN 201811440799 A CN201811440799 A CN 201811440799A CN 109580729 A CN109580729 A CN 109580729A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
Abstract
The invention discloses a kind of capacitance chromatographic sensor detecting systems, for detecting fluid-mixing distribution in pipeline, capacitance chromatographic sensor in detection system is flexible structure, it include the bucking electrode for several measuring electrodes and another side for being attached to polyimides or polyester plastics film one side, measuring electrode is in long strip, the measuring electrode length direction of strip is along the axial setting for being detected pipeline, width direction is evenly distributed along the periphery for being detected pipeline, the connector connecting respectively with measuring electrode is equipped in the end of measuring electrode, connector is connect by data line with signal picker, flexible insulation coating is coated in the upper surface of measuring electrode and bucking electrode, capacitance chromatographic sensor is wrapped in the surface of tested buret, and it is connected in interface with connector.The system structure is simple, easy to use, detection effect is good, small in size, and convenient for handling, the mountable outside or inside in various tubing detects the distribution of fluid-mixing in pipeline.
Description
Technical field
The present invention relates to sensor detecting system technical fields, and in particular to one kind is for detecting fluid-mixing point in pipeline
The capacitance chromatographic sensor detecting system of cloth state.
Background technique
Two-phase flow fluid in pipe often occurs in the fluids such as chemical industry, space division related industries, is related to design optimization and fortune
Row safety, thus it is significant to the detection of two-phase distribution.Capacitance chromatography imaging
(ElectricalCapacitanceTomography, ECT) technology has different total using phase contents different in infinitesimal in field
The characteristics of dielectric constant, by measurement multi-pole-piece capacitance between any two, using inversion algorithm to being flowed in infinitesimal each in field
The mutually distribution of body carries out solution imaging, is a kind of measuring technique of non-intrusion type, have response speed block, stream field is noiseless,
The advantages that phase content and phase distributed data can be obtained simultaneously, is widely studied at present and is applied in room temperature fluids industry.
Larger different from indoor environment fluid gas-liquid dielectric constant difference, natural environment flows down body liquid-gas dielectric constant ratio
Generally less than 1.5, imaging results are extremely sensitive for measurement noise, have very high requirement to the arrangement precision of pole piece, in order to
Guarantee has preferable imaging effect, needs to construct good electromagnetic armouring structure.And due to metal and nonmetallic in natural ring
Shrinking percentage difference under border is larger, traditional bonding or by ablation of metals in the pole piece installation method of nonmetallic surface, will very
It is easy to cause and loosens or even nonmetal pipeline by metal thermal stress is generated rupture.In addition, under nonmetal pipeline natural environment
Embrittlement easily occurs.The present invention is directed to the phase content measuring technique needs of natural environment fluid, synthetic natural environment fluid
Material property under physical property itself and natural environment carries out invention design.
Zhejiang University's refrigeration and natural environment research institute Zhang little Bin, Chen Jianye, Wang Yuchen, Xie Huangjun et al. are in succession to application
In the measurement of natural environment fluid two phase flow void fraction two pole piece capacitance sensors and be mutually distributed suitable for natural environment fluid and
The electrical capacitance tomography of void fraction measurement has carried out theoretical and experiment research.The experiment of Chen Jianye shows secondly pole piece
Capacitance sensor can be controlled within 15% the measurement error of natural environment fluid void fraction in pipe, but outside this sensor
Two electrode slices are wrapped up, electromagnetic armouring structure is not taken, it is huge with structure of the invention difference.Xie Huangjun is to applied to nature ring
The electrical capacitance tomography of border fluid measurement has carried out theoretical validation, it is found that the result of its numerical experiment is preferable, but article does not have
Relate to the concrete structure design for being directed to the capacitance tomography sensor of natural environment fluid two-phase flow measurement.Filippov
Natural environment fluid two phase flow void fraction is measured using radio frequency sensor etc. having studied, the results showed that the measurement essence of radio frequency sensor
For degree up to 1.5%, it and the present invention use entirely different principle and structure.
Chinese patent CN100412534C discloses a kind of capacitance chromatography imaging device that should be used for microchannel, the sensing
Device is intended to make up the demand that ECT sensor manages the film thickness measurement of interior two phase flow on the micro scale.The invention without circumferential shielding with
The fastening structure of felt pad, electrode directly contact fluid, and have larger difference in structure of the invention.
Chinese patent CN102364420B discloses a kind of high-precision ECT intelligence sensor, the Sensor section of the invention
Punched on isolated pipe, electrode slice directly contacts fluid, be bolted electrode slice, with have in structure of the invention compared with
Big difference.
Chinese patent CN104655692B discloses a kind of structure of ECT sensor using two layers of frame fixed electrode film
It designs, barricade is not provided on invention circumferential direction, shielding construction is mounted on outline border to be corresponded with pole piece, is existed with the present invention
There is larger difference in structure.
Chinese patent CN106932446A discloses a kind of ECT sensor that built-in electrode is equipped in pipe, in the invention,
There is partial electrode piece to be mounted on inside pipeline, applicable pipeline configuration is the pipeline with concentric structure, with the present invention in structure
It is upper that there is larger difference.
Chinese patent CN103454318B discloses a kind of capacitance tomography sensor with Double layer rotating electrode,
Using the rotatable round tube of two coaxial different diameters, electrode is placed in the measured capacitance value that multi-angle is carried out on rotation round tube,
The invention electrode, which is adopted, is fixed on round tube wall in the method for paste and has rotary structure, has in structure with the present invention larger
Difference.
Chinese patent CN20485537U discloses a kind of plane capacitance chromatography sensor, and electrode slice is using flat in the invention
The arrangement mode of face array has larger difference with the present invention in structure.
Chinese patent CN108152341A discloses a kind of interior flowing capacitance chromatography imaging device of natural environment fluid hose, should
Device is applied to the capacitance chromatographic of flowing flow pattern monitoring in natural environment fluid (such as liquid nitrogen (~78K), liquid oxygen (~90K)) pipe
Imaging.Device includes: isolated pipe, electrode slice, limit sleeve, shielded partitions, electro-magnetic shielding cover, shading ring, fastening stud.The dress
It sets and is directed to the contraction setting fastening stud maintenance electrode slice of material under natural environment and being bonded for isolated pipe, while for certainly
The close feature of right ambient flow body fluid gas dielectric constant designs shielding construction.This natural environment fluid capacitance chromatography imaging dress can be square
Just it is connect with system other pipelines；It can be used for the larger range from room temperature to natural environment, repeatedly significantly temperature cycles not shadow
Ring measurement accuracy；Positioning accuracy is high, effectiveness is good.But the apparatus structure is complicated, and bulky, test operation is time-consuming to be taken
Power is not easy on the pipeline for being installed to any caliber.
United States Patent (USP) US8614707B2 discloses a kind of three-dimensional capacitance tomography sensor design in real time, the patent pair
Design is optimized in relative positional relationship between the shape and structure and pole piece of electrode slice, not to the mounting means of electrode slice and
Device specific structure is designed, and electrode slice is also distributed arrangement in the axial direction, biggish with having in structure of the invention
Difference.
United States Patent (USP) US7496450B2 discloses a kind of multiphase-flow imaging monitoring side based on electrical capacitance tomography
Method, which specifies the distribution mode of sensor but is not designed to the mounting structure of sensor, and does not set
The barricade in circumferential direction is counted, there are larger differences with this patent.
United States Patent (USP) US8461852B2 discloses a kind of being distributed to fluidized bed endoparticle based on electrical capacitance tomography
The electrode of the method being monitored, ECT sensor is fixed by the way of being embedded to pipeline outer wall, in structure specially with this
There are larger differences for sharp structure.
In conclusion normal according to the physical property feature of material each under natural environment environment and natural environment fluid liquid phase dielectric
Several features, design it is a kind of be necessary specifically in the capacitance chromatography imaging device flowed in natural environment fluid hose,
The characteristics of technology possesses non-intrusion measurement, the case where the phase content at section can be obtained simultaneously and be mutually distributed.
Summary of the invention
It is an object of the present invention to overcome defect existing in the prior art, provide a kind of structure it is simple, it is easy to use,
Detection effect is good, compact, and convenient for handling, the mountable outside or inside in various pipelines is mixed for detecting in pipeline
The capacitance chromatographic sensor detecting system of fluid distrbution state.
To achieve the above object, it the technical scheme is to design a kind of capacitance chromatographic sensor detecting system, is used for
Fluid-mixing distribution in pipeline is detected, the capacitance chromatographic sensor in the detection system is flexible structure, flexible electrical
Holding chromatography sensor includes several measuring electrodes for being attached to polyimides or polyester plastics film one side, and is attached to
The bucking electrode of polyimides or polyester plastics film another side, measuring electrode is in long strip, the measuring electrode length of strip
Along the axial direction setting of detected pipeline, width direction is evenly distributed along the periphery for being detected pipeline in direction, in several measurement electricity
The end of pole is equipped with the connector connecting respectively with each measuring electrode, and connector is connect by data line with signal picker,
It is coated with flexible insulation coating in the upper surface of measuring electrode and bucking electrode, the attachment of measuring electrode another side will be attached on one side
There is bucking electrode, and is separately coated with polyimides or the polyester modeling of flexible insulation coating with bucking electrode surface in measuring electrode
The surface that material film is wrapped in tested buret constitutes the cannula-like capacitance chromatographic sensor of closure, and connects in interface connector
It connects.
In order to the information for detecting capacitance chromatographic sensor, after computer disposal, reproduction reverts to display
On device, the image information of pipeline internal mix fluid distrbution state is formed, preferred technical solution is that the system comprises settings
Capacitance chromatographic sensor inside or outside pipeline, capacitance chromatographic sensor are connect by data line with signal picker, are believed
Number collector is connect with data collecting card, and data collecting card is arranged on the mainboard of computer, and computer adopts data collecting card
After the data collected are handled, the image of pipeline internal mix fluid distrbution state is transmitted to the display connecting with computer
On device.
In order to it is more acurrate it is more optimized show, the image information of pipeline internal mix fluid distrbution state, preferably
Technical solution in addition, the measuring electrode quantity be 6~24.
For the ease of capacitance chromatographic sensor be measured pipeline on installation and removal, preferred technical solution in addition,
The polyimides or polyester plastics film are magnetic plastics flexible glue bar, nylon adherent buckle, zipper, primary and secondary in the connector of interface
Any one in snap-fastener.
In order to enable capacitance chromatographic sensor repeated multiple times can use, it is ensured that it is not by the interference of reduction of contrast signal, and energy
Keep its easy-to-connect quick, preferred technical solution at the both ends of described sleeve pipe shape capacitance chromatographic sensor in addition, be respectively equipped with
Flexiplast side or rubber edge, the connector that interface is arranged in are embedded into flexiplast side or in rubber edge.
It can play a protective role in order to the surface to capacitance chromatographic sensor and flexibility, and body
The small processing and fabricating of product is convenient, and preferred technical solution is in addition, the flexible insulation coating is plastic film or is rubber film.
In order to ensure the measurement precision of capacitance chromatographic sensor, the conductivity of capacitor, preferred technology are improved
Scheme is in addition, the measuring electrode is the copper coat or silvering for being attached to polyimides or polyester plastics film surface.
In order to ensure the measurement precision of capacitance chromatographic sensor, the conductivity of capacitor is provided, further preferably
Technical solution in addition, the polyimides or polyester plastics film with a thickness of 0.1mm, the measuring electrode and bucking electrode
With a thickness of 120 μm~150 μm, the length of strip measuring electrode is 20~50mm, the width of strip measuring electrode according to
Formula w=π d/n- δ is calculated, in which: w is measuring electrode width, and d is the outer diameter for being measured pipeline, and n is measuring electrode quantity, δ
The spacing between measuring electrode.
In order to ensure the measurement precision of capacitance chromatographic sensor, the interference of noise signal, preferred technology are avoided
Scheme on the signal picker in addition, be equipped with the line of ground connection.
In order to realize acquisition, transmission in distal end to pipeline internal mix fluid distrbution status information, preferred skill
Art scheme is in addition, signal picker module by wireless communication, and the wireless communication module being arranged on computer motherboard,
By wireless signal transmission, the collected signal of signal picker is sent to data collecting card.
The advantages and beneficial effects of the present invention are: this is used to detect the capacitance chromatographic of fluid-mixing distribution in pipeline
Sensor detecting system have structure is simple, easy to use, detection effect is good, compact, convenient for handling, it is mountable various
The features such as outside or inside of pipeline.Since the capacitance chromatographic sensor in the system is made into the structure shape of flexible circuit board
Formula can be directly wrapped in the outer surface of measured pipeline so that sensor is not only soft but also thin, can also be embedded into the interior table of pipeline
Then face again draws data line.Capacitance chromatographic sensor can be made into very long flexible-belt, make capacitance chromatographic every time
When sensor, the length that only interception needs connects upper connector and data line connector in its end.It can substantially reduce in this way
The cost of manufacture of capacitance chromatographic sensor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the present invention holds chromatography sensor detecting system；
Fig. 2 is that the present invention holds the axial sectional stretch-out view for holding chromatography sensor in chromatography sensor detecting system；
Fig. 3 is that the present invention holds the cross-sectional view for holding chromatography sensor in chromatography sensor detecting system.
In figure: 1, plastic film；2, measuring electrode；3, bucking electrode；4, connector；5, signal picker；6, flexible exhausted
Edge coating；7, connector；8, data collecting card；9, computer；10, display；11, flexiplast side；12, line.
Specific embodiment
With reference to the accompanying drawings and examples, further description of the specific embodiments of the present invention.Following embodiment is only
For clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
As shown in Figures 1 to 3, the present invention is a kind of capacitance chromatographic sensor detecting system, for detecting mixed flow in pipeline
Body distribution, the capacitance chromatographic sensor in the detection system is flexible structure, and flexible capacitance chromatographic sensor includes
There are several measuring electrodes 2 for being attached to 1 one side of polyimides or polyester plastics film, and is attached to polyimides or polyester
The bucking electrode 3 of 1 another side of plastic film, measuring electrode 2 is in long strip, and 2 length direction of measuring electrode of strip is along tested
The axial setting in test tube road, width direction is evenly distributed along the periphery for being detected pipeline, sets in the end of several measuring electrodes 2
There is the connector 4 connecting respectively with each measuring electrode 2, connector 4 can be the combination hub connecting with each measuring electrode
Or the plug to be connect with each measuring electrode, connector 4 is connect by data line with signal picker 5, in measuring electrode 2
It is coated with flexible insulation coating 6 with the upper surface of bucking electrode 3,2 another side of measuring electrode will be attached on one side and be attached with shielding
Electrode 3, and the polyimides or polyester plastics of flexible insulation coating 6 are separately coated in measuring electrode 2 with 3 surface of bucking electrode
The outer surface that film 1 is wrapped in tested buret constitutes stall tubular capacitor chromatography sensor, and connects in interface connector 7
It connects.
In order to the information for detecting capacitance chromatographic sensor, after computer disposal, reproduction reverts to display
On device, the image information of pipeline internal mix fluid distrbution state is formed, the preferred embodiment of the invention is the system packet
The capacitance chromatographic sensor being arranged in inside or outside pipeline is included, capacitance chromatographic sensor passes through data line and signal picker 5
Connection, signal picker 5 are connect with data collecting card 8, and data collecting card 8 is arranged on the mainboard of computer 9, and computer 9 is right
Data collecting card acquisition 8 to data handled after, the image of pipeline internal mix fluid distrbution state is transmitted to and calculates
On the display 10 of machine connection.
In order to it is more acurrate it is more optimized show, the image information of pipeline internal mix fluid distrbution state, this hair
Bright preferred embodiment is in addition, the quantity of the measuring electrode 2 is 6~24, preferably 12.
For the ease of capacitance chromatographic sensor in the installation and removal being measured on pipeline, the preferred embodiment of the invention
In addition, the polyimides or polyester plastics film 1 are magnetic plastics flexible glue bar, nylon adherent buckle, drawing in the connector 7 of interface
Lock, any one in primary and secondary snap-fastener, it is preferred to use magnetic plastics flexible glue bar.
In order to enable capacitance chromatographic sensor repeated multiple times can use, it is ensured that it is not by the interference of reduction of contrast signal, and energy
Keep its easy-to-connect quick, the preferred embodiment of the invention is in addition, at the both ends of described sleeve pipe shape capacitance chromatographic sensor point
Not She You flexiplast side 11 or rubber edge, the connector 7 that interface is arranged in is embedded into flexiplast side 11 or rubber edge
It is interior.
It can play a protective role in order to the surface to capacitance chromatographic sensor and flexibility, and body
The small processing and fabricating of product is convenient, and the preferred embodiment of the invention is in addition, the flexible insulation coating 6 is plastic film or is rubber
Film, it is preferred to use rubber film.
In order to ensure the measurement precision of capacitance chromatographic sensor, the conductivity of capacitor is provided, the present invention is preferred
Embodiment in addition, the measuring electrode 2 is the copper coat for being attached to 1 surface of polyimides or polyester plastics film, or
Silvering.
In order to ensuring the measurement precision of capacitance chromatographic sensor, the conductivity of capacitor is provided, the present invention is into one
Walk preferred embodiment in addition, the polyimides or polyester plastics film 1 with a thickness of 0.1mm, the measuring electrode 2 with
Bucking electrode 3 with a thickness of 120 μm~150 μm, preferably 136 μm, the length of strip measuring electrode is 20~50mm, preferably
Width for 30mn, strip measuring electrode is calculated according to formula w=π d/n- δ, in which: w is measuring electrode width, and d is tested
The outer diameter in buret road, n are measuring electrode quantity, δ spacing between measuring electrode.
In order to ensure the measurement precision of capacitance chromatographic sensor, the interference of noise signal is avoided, the present invention is preferred
Embodiment in addition, on the signal picker 5 be equipped with ground connection line 12.
In order to realize acquisition, transmission in distal end to pipeline internal mix fluid distrbution status information, the present invention is excellent
The embodiment of choosing in addition, the signal picker 5 can module by wireless communication, with the nothing being arranged on 9 mainboard of computer
Line communication module sends the collected signal of signal picker 5 to data collecting card 8 by wireless signal transmission.
Currently, (El ectrical Capac itance Tomography, is abbreviated as more capacitance chromatography imaging
ECT) signal collecting device has 24 Measurement channels, can connect 24 dielectric constant distribution measuring electrodes.The example uses 12
The ECT sensor of a measuring electrode.Measuring electrode 2 and the length of bucking electrode 3 can be optionally depending on sensor lengths.This
Sensor length is 35mm in embodiment, and 2 length of measuring electrode is 30mm, and the axial length of bucking electrode 3 is 28mm.Measurement electricity
The width of pole 2 is calculated according to formula w=π d/n- δ, in which: w is measuring electrode width, and d is the inner tube outside diameter of casing, and n is measurement
Electrode width is isolated in number of electrodes, δ between measuring electrode.The inner tube outside diameter of the implementation case middle sleeve is 16mm, each to measure
Electrode width is 3.7mm, and isolation electrode width is 0.5mm.
First by containing the sensor measurement electrod-arrays of 12 measuring electrodes 2, electrode gap from flexible insulating coating 6,
End flexiplast side 11 and bucking electrode 3 attach the outside wall surface for being installed on sleeve type structure, and signal-transmitting cable is through flexibility
It draws one end of plastic edge 11.By the work of capacitance chromatographic sensor, 2 signal of measuring electrode is by data line through flexiplast
The one end on side 11 leads to ECT signal collector 5, carries out data processing and image reconstruction in the computer 9, obtains in interior conduit
The distribution figure of portion's vapour, liquid two-phase.
When detecting in detection to each electrode, motivating the adjacent electrode gain of electrode is low gain, remaining is high-gain.
First using No. 1 electrode as excitation electrode, its capacitance between 2 to No. 12 sensors is detected；It then is sharp with No. 2 electrodes
Electrode is encouraged, its capacitance between 3 to 12 sensors is detected；And so on, 66 capacitances are detected altogether.Excitation is logical with detection
Signal feeding signal picker 5 will be controlled by crossing computer 9, and then control the excitation and detecting state of sensor electrode.
The basic principle of PT technology is in the present invention, arranges several according to certain rules to multiphase in tested flow duct
The sensor of the dispersion phase sensitive of fluid, sensor array obtain the field of flow of measurand with non-contact or non-intruding mode
Then information calculates the distributed image on the section of fluids within pipes using fast image reconstruction algorithm.
Its measuring principle of electrical capacitance tomography is that have different dielectric constants based on each split-phase medium of heterogeneous fluid,
When the concentration of each phase component and its distribution change, the variation of multiphase flow mixture dielectric constant can be caused, to make it
Measurement capacitance changes therewith, and the size and distribution situation of the size reaction multiphase flow medium phase concentration of capacitance use
Multiple electrode array formula capacitance sensor, the intercombination between each electrode can provide the multiple of reaction heterogeneous fluid concentration distribution
Measurement capacitance uses certain image reconstruction algorithm as data for projection, can rebuild and reflect device a certain tested
Measure the image of multiphase flow dielectric distribution situation in conduit region.
The working mechanism of ECT system is.Dielectric distribution changes and causes the variation of capacitance in non-conductive object field, passes through survey
The variation of amount capacitance realizes the detection to multiphase flow parameter to rebuild the dielectric distribution in object field.Common ECT system by
Three essential part compositions, sensor array, data collection system, image reconstruction computer.It is uniform in pipeline outer wall or inner wall
It is symmetrical arranged copper electrodes plate, since each split-phase medium of multiphase flow has different dielectric constants, when each phase group in pipeline
When point concentration and its distribution change, the variation of multiphase flow mixture equivalence dielectric constant can be caused, thus between making pole plate
Measurement capacitance also changes.Data collection system measure any between of pole plate capacitance, obtain under different observation angles
Data for projection be admitted to image reconstruction computer.These measured values reflect the distribution situation of dielectric constant in pipeline, use
Corresponding image reconstruction algorithm, so that it may rebuild the dielectric distribution figure of tested object field, as shown in Figure 1.
Capacitance data acquisition system includes the data acquisition control of multichannel, capacitor/voltage (C/V) conversion, A/D conversion and
Communication interface etc..The wherein design of C/V conversion circuit is most critical and most difficult, and the data of system acquisition imaging are simultaneously transferred to
The accuracy of computer, imaging is largely dependent upon the accuracy of the system.
Multi-channel data acquisition control in data collection system is completed by multi-channel scan circuit, and the effect of the circuit is
According to the requirement of computer instruction, corresponding two electrodes are selected as measurement battery plate in ground, measure its capacitance, while making other spare time
Set electrode ground connection.The A/D of capacitance data acquisition system is converted and the effect of communication interface is to complete A/D conversion, and be responsible for original
The analog filtering of beginning data and pretreatment, and communicated with computer.
Due to the capacitance very little of capacitance sensor pole interpolar, in the system of 12 electrode, the order of magnitude of capacitance is
0.03pF grades, maximum value and minimum value difference are nearly a hundred times.Measuring so small and difference multiple, biggish capacitor is that comparison is tired again
Difficult, this especially proposes higher requirement to capacitor/voltage conversion portion to data collection system, this is also capacitance chromatographic
One of main bugbear in imaging technique development process.
The capacitance data Acquisition Circuit of capacitance tomography system must meet the following requirement:
1, dynamic range is big, and measurement range is sufficiently wide；
2, low drifting, good stability；
3, the linearity is good, and measurement sensitivity is high；
4, the ability of stronger anti-stray capacitance, can eliminate the influence of leakage conductance.
Imaging system is mainly responsible for using PC machine and issues an instruction to control data collection system to peripheral interface circuit
Data are acquired, and receive data from data collection system, image reconstruction is then carried out using corresponding algorithm and image is shown.By
Different in the environment of application, the requirement to image reconstruction is not also standby identical, in real-time detection, to the rate request of image reconstruction
Higher, the speed of reconstruction is per second not less than 25 frames；It is lower to the requirement of speed in non real-time detection, but the requirement to precision is then
Want higher.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of capacitance chromatographic sensor detecting system, for detecting fluid-mixing distribution in pipeline, which is characterized in that institute
Stating the capacitance chromatographic sensor in detection system is flexible structure, and flexible capacitance chromatographic sensor includes to be attached to polyamides Asia
Several measuring electrodes of amine or polyester plastics film one side, and it is attached to polyimides or polyester plastics film another side
Bucking electrode, measuring electrode is in long strip, and the measuring electrode length direction of strip is along the axial setting for being detected pipeline, width
Direction is evenly distributed along the periphery of detected pipeline, is equipped in the end of several measuring electrodes and connects respectively with each measuring electrode
The connector connect, connector are connect with signal picker by data line, are coated in the upper surface of measuring electrode and bucking electrode
Flexible insulating coating will be attached with measuring electrode another side on one side and be attached with bucking electrode, and measuring electrode separately with shielding
The surface that electrode surface is coated with the polyimides of flexible insulation coating or polyester plastics film is wrapped in tested buret is constituted
The cannula-like capacitance chromatographic sensor of closure, and connected in interface with connector.
2. capacitance chromatographic sensor detecting system as described in claim 1, which is characterized in that the system comprises be arranged in pipe
Capacitance chromatographic sensor inside or outside road, capacitance chromatographic sensor are connect by data line with signal picker, and signal is adopted
Storage is connect with data collecting card, and data collecting card is arranged on the mainboard of computer, and computer collects data collecting card
Data handled after, the image of pipeline internal mix fluid distrbution state is transmitted to the display connecting with computer
On.
3. capacitance chromatographic sensor detecting system as described in claim 1, which is characterized in that the quantity of the measuring electrode is
6~24.
4. capacitance chromatographic sensor detecting system as described in claim 1, which is characterized in that the polyimides or polyester modeling
Expect that film in the connector of interface is magnetic plastics flexible glue bar, nylon adherent buckle, zipper, any one in primary and secondary snap-fastener.
5. capacitance chromatographic sensor detecting system as described in claim 1, which is characterized in that in described sleeve pipe shape capacitance chromatographic
The both ends of sensor are respectively equipped with flexiplast side or rubber edge, and the connector that interface is arranged in is embedded into flexiplast side
Or in rubber edge.
6. capacitance chromatographic sensor detecting system as described in claim 1, which is characterized in that the flexible insulation coating is modeling
Material film is rubber film.
7. capacitance chromatographic sensor detecting system as described in claim 1, which is characterized in that the measuring electrode is to be attached to
The copper coat or silvering of polyimides or polyester plastics film surface.
8. capacitance chromatographic sensor detecting system as claimed in claim 7, which is characterized in that the polyimides or polyester modeling
Expect film with a thickness of 0.1mm, the measuring electrode and bucking electrode with a thickness of 120 μm~150 μm, strip measuring electrode
Length be 20~50mm, the width of strip measuring electrode is calculated according to formula w=π d/n- δ, in which: w is that measuring electrode is wide
Degree, d are the outer diameter for being measured pipeline, and n is measuring electrode quantity, δ spacing between measuring electrode.
9. capacitance chromatographic sensor detecting system as claimed in claim 2, which is characterized in that set on the signal picker
There is the line of ground connection.
10. capacitance chromatographic sensor detecting system as claimed in claim 2, which is characterized in that the signal picker passes through
Wireless communication module, and the wireless communication module being arranged on computer motherboard, by wireless signal transmission, by signal picker
Collected signal sends data collecting card to.
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| CN110763294A (en) * | 2019-10-29 | 2020-02-07 | 中国电子科技集团公司第四十八研究所 | Double-capacitance two-phase flow parameter measuring instrument and measuring method |
| CN112730542A (en) * | 2020-10-15 | 2021-04-30 | 中国民航大学 | Planar array capacitance value imaging sensor |
| CN112857712A (en) * | 2021-01-18 | 2021-05-28 | 西安石油大学 | A cross plane array sensor for burying ground horizontal oil tank leakage monitoring |
| CN112986342A (en) * | 2019-12-12 | 2021-06-18 | 中国科学院大连化学物理研究所 | High-temperature three-dimensional capacitance tomography sensor and imaging device thereof |
| CN113075267A (en) * | 2021-03-29 | 2021-07-06 | 合肥鑫晟光电科技有限公司 | Liquid concentration detection device |
| CN114413745A (en) * | 2022-01-04 | 2022-04-29 | 华北电力科学研究院有限责任公司 | Device and method for detecting insulation moisture depth of generator stator |
| CN115264407A (en) * | 2022-06-14 | 2022-11-01 | 昆明理工大学 | Intelligent pipeline imaging detector based on tomography measurement and detection method |
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| CN112730542B (en) * | 2020-10-15 | 2023-01-17 | 中国民航大学 | Planar array capacitance value imaging sensor |
| CN112857712A (en) * | 2021-01-18 | 2021-05-28 | 西安石油大学 | A cross plane array sensor for burying ground horizontal oil tank leakage monitoring |
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| CN115264407A (en) * | 2022-06-14 | 2022-11-01 | 昆明理工大学 | Intelligent pipeline imaging detector based on tomography measurement and detection method |
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