CN106932446A - A kind of capacitance tomography sensor - Google Patents
A kind of capacitance tomography sensor Download PDFInfo
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- CN106932446A CN106932446A CN201511023271.XA CN201511023271A CN106932446A CN 106932446 A CN106932446 A CN 106932446A CN 201511023271 A CN201511023271 A CN 201511023271A CN 106932446 A CN106932446 A CN 106932446A
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Abstract
The invention provides a kind of capacitance tomography sensor, the capacitance tomography sensor includes outer shield cover, outer electrode group and built-in electrode group etc., outer electrode group includes N block outer electrode pieces, it is spaced apart between N block outer electrode pieces, uniformly it is close to pipeline outer wall, outer shield cover covers outer electrode piece and pipeline outer wall, built-in electrode group includes electrode unit, electrode unit includes in-built electrical pole piece and protecting frame, the capacitance tomography sensor is applied to the imaging region of the polytype equipment such as square box and inside and outside cylinder, built-in electrode group is set inside imaging region, substantially increase imaging precision, built-in electrode group simple structure, processing capacity is small, it is time saving and energy saving, it is convenient to install.
Description
Technical field
The present invention relates to sensor technical field, more particularly to a kind of capacitance tomography sensor.
Background technology
Pharmacy, food and other chemical fields have substantial amounts of fluidized bed drying, granulation and are coated
Technique.Realize being not only the knot for optimizing fluidized-bed reactor to the on-line monitoring of above-mentioned technical process
Structure provides reference, moreover it is possible to improve the quality of final products.In view of above-mentioned technique is in a fluidized bed reactor
Complicated running status, at present use monitoring method have：Optical method, positive electron trace method etc..But
These means technical sophistications, have more requirement to equipment and running environment.Therefore need a kind of relatively easy
Monitor in real time of the new on-line monitoring technique applied widely to realize to said process.Electric capacity
Tomography (Electrical Capacitance Tomography, ECT) is used as a kind of visible
Technology, because its simple structure, non-intruding and noncontact, radiationless, image taking speed are fast, high temperature resistant
The features such as high pressure, low cost, is increasingly becoming a kind of very promising process imaging technique.Capacitor layers
Although analysis imaging technique has above-mentioned many advantages, and the imaging precision of existing capacitance tomography system is general
All over not high, especially for different types of imaging region, how to improve capacitance tomography system into
As precision turns into a kind of important research topic.
The content of the invention
(1) technical problem to be solved
In order to solve the problems, such as prior art, the invention provides a kind of capacitance chromatography imaging sensing
Device.
(2) technical scheme
A kind of capacitance tomography sensor of the invention, it includes：Outer shield cover, outer electrode
Group and built-in electrode group, wherein, outer electrode group, it includes N block outer electrode pieces, N block outer layers
It is spaced apart between electrode slice, be uniformly close to pipeline outer wall, N takes 8,12 or 16；Outer layer
Radome, its covering outer electrode piece and pipeline outer wall；Built-in electrode group, it includes electrode unit,
Electrode unit includes in-built electrical pole piece and protecting frame, and protecting frame is that two block sizes are more than in-built electrical pole piece
Flat board, in-built electrical pole piece is sandwiched in centre by it, and inner-walls of duct is fixed at its two ends.
Preferably, the capacitance tomography sensor also includes：Internal layer electrode group and inner shield 14,
First outer electrode group, it includes N block first electrodes piece 12, between N block first electrodes piece 12 between
At a certain distance, uniformly it is close to the outer wall of outer layer cylinder 51；The covering of first outer shield cover 11 the
One electrode slice 12 and outer layer barrel 51；Internal layer electrode group, it includes M block second electrodes piece 13, M
It is spaced apart between block second electrode piece 13, uniform be close to it is just right with the first outer electrode group
Inner layer cylinder 52 inwall；The covering second electrode of inner shield 14 piece 13 and inner layer cylinder 52；
First built-in electrode group is located between outer layer cylinder 51 and inner layer cylinder 52, just to the first outer electrode
The annular region 53 of group and internal layer electrode group, it is included along the radial direction of annular region 53, in annular
Equally distributed K electrode unit in region 53, electrode unit includes one the 3rd electrode slice 15 and the
One protecting frame 16, the first protecting frame 16 is flat board of two block sizes more than the 3rd electrode slice, its two ends
Outer layer cylinder 51 and inner layer cylinder 52 are fixed on, M and K takes 4, and the first built-in electrode group includes 4
Individual electrode unit, the outer wall around inner layer cylinder 52 is into right-angled intersection.
Preferably, the 3rd electrode slice 15 and the midpoint of the first electrode piece 12 of its left and right sides and its left side
The midpoint alignment of the second electrode piece 13 of right both sides, the first outer electrode group and internal layer electrode group are closed
It is symmetrical in the first built-in electrode group.
Preferably, it is highly identical, width phase after first electrode piece 12 and second electrode piece 13 are open and flat
Same or different rectangular copper；And/or the open and flat rear square bent for softness of the first outer shield cover 11
Shape scale copper flat board, the thickness of thin rectangular copper plate flat board is 0.3-0.5mm, and its length is than outer layer cylinder
51 outer wall Zhou Chang great 20-30mm, its width 20-30mm higher than the height of first electrode piece 12；
And/or it is afterwards soft bent thin rectangular copper plate flat board that inner shield 14 is open and flat, thin rectangular copper plate is put down
, than the inwall Zhou Chang great 20-30mm of inner layer cylinder 52, its width is than first electrode piece 12 for the length of plate
Height h 20-30mm high.
Preferably, the 3rd electrode slice 15 is the height with first electrode piece 12 and second electrode piece 13
Identical, width is less than or equal to the rectangular copper of the width of annular region 53, and the first protecting frame 16 is
The flat board with chamfering that two pieces of nonmetallic materials make, slab-thickness is 5-10mm, and its height is big
In the height of the 3rd electrode slice 15, its width is equal to the width of annular region 53, glue is used between flat board
Bonding, centre is sandwiched in by the 3rd electrode slice 15, and two ends are pasted on outer layer cylinder 51 and inner layer cylinder 52.
Preferably, first support 31 is fixed between the first outer shield cover 11 and outer layer barrel 51,
First support 31 is made up of two identical semi-circular brackets 32, and two semi-circular brackets 32 are connected
First screwed hole 33 at place is fixed on the outer wall of outer layer cylinder 51 by mode connects for screw, and by outside first
Layer radome 11 is covered, and the wire of connection first electrode piece 12 is by first in semi-circular bracket 32
Through hole 34 is drawn.
Preferably, second support, second support are fixed between inner shield 14 and inner layer cylinder 52
Also it is made up of two identical semi-circular brackets 32, two the first screw threads of the junction of semi-circular bracket 32
Hole 33 is close to the inwall of inner layer cylinder 52 by mode connects for screw, and is covered by inner shield 14,
The wire of connection second electrode piece 13 is drawn by the first through hole 34 in semi-circular bracket 32.
Preferably, two flat boards of the first protecting frame 16 of the first built-in electrode group are using punching, spiral shell
Tether and connect.
Preferably, the second outer electrode group, it includes the electrode slice 22 of N blocks the 4th, the electricity of N blocks the 4th
Spaced apart between pole piece 22, the uniform outer wall for being close to square box 54, the second outer shield
Cover 21 covers the 4th electrode slice 22 and the outer wall of square box 54, and the second built-in electrode group includes that one is parallel
In the frame of square box 54 1 and just to the electrode unit of the second outer electrode group, electrode unit includes P
5th electrode slice 23 and the second protecting frame 26 of individual head and the tail arrangement separated by a distance, wherein the 5th electricity
The 4th electrode slice 22 that the frame of the square box 54 number P of pole piece 23 parallel with it is fitted
Number is identical, and the second protecting frame 26 is flat board of two block sizes more than the 5th electrode slice 23, its two ends
Two frames of square box 54 are fixed on, N takes 8,12 or 16.
Preferably, the second outer shield cover 21 is close to the 4th electrode slice 22 and the outer wall of square box 54；
Or second be fixed with the 3rd support 41, the 3rd support between outer shield cover 21 and the outer wall of square box 54
41 are made up of two side supports 42 long and two short side supports 43, its respectively with the side long of square box 54
Corresponding with short side, the second screwed hole 44 of side support 42 long and the junction of short side support 43 is by screw
Connection, is fixed on the outer wall of square box 54, and is covered by the second outer shield cover 21, connection the 4th
The wire of electrode slice 22 is drawn by the second through hole 45 on side support 42 long and short side support 43.
(3) beneficial effect
From above-mentioned technical proposal as can be seen that the invention has the advantages that：
(1) built-in electrode group is set inside imaging region, imaging precision is substantially increased；
(2) capacitance tomography sensor is applied to the polytype equipment such as square box and inside and outside cylinder
Imaging region；
(3) built-in electrode group simple structure, processing capacity are small, time saving and energy saving, convenient to install.
Brief description of the drawings
The top view of the annular region that Fig. 1 is applicable by the embodiment of the present invention；
The sectional view of the annular region that Fig. 2 is applicable by the embodiment of the present invention；
Fig. 3 is the capacitance tomography sensor structure chart of first embodiment of the invention；
Fig. 4 for first embodiment of the invention it is open and flat after first electrode piece, second electrode piece, the 3rd
Electrode slice structure chart；
Fig. 5 is another capacitance tomography sensor structure chart of first embodiment of the invention；
Fig. 6 is another capacitance tomography sensor structure chart of first embodiment of the invention；
Fig. 7 is the capacitance tomography sensor structure chart of second embodiment of the invention；
Fig. 8 is another capacitance tomography sensor structure chart of second embodiment of the invention；
Fig. 9 is another capacitance tomography sensor structure chart of second embodiment of the invention；
Figure 10 is the top view and front view of the semi-circular bracket of first and second embodiment of the invention；
Figure 11 is the capacitance tomography sensor structure chart of third embodiment of the invention；
Figure 12 is another capacitance tomography sensor structure chart of third embodiment of the invention；
Figure 13 is the side support long of third embodiment of the invention and the top view and front view of short side support；
Figure 14 is the capacitance tomography sensor imaging effect of Fig. 3, Fig. 5 and Fig. 6 and corresponding
There is no the capacitance tomography sensor imaging effect figure of built-in electrode group；
Figure 15 is the capacitance tomography sensor imaging effect of Fig. 7, Fig. 8 and Fig. 9 and corresponding
There is no the capacitance tomography sensor imaging effect figure of built-in electrode group；
Figure 16 is the imaging effect figure of the capacitance tomography sensor of Figure 11 and 12.
【Symbol description】
11- the first outer shield covers；12- first electrode pieces；13- second electrode pieces；14- inner shields；
The electrode slices of 15- the 3rd；The protecting frames of 16- first；
21- the second outer shield covers；The electrode slices of 22- the 4th；The electrode slices of 23- the 5th；The protecting frames of 24- second；
31- first supports；32- semi-circular brackets；The screwed holes of 33- first；34- first through hole；
The supports of 41- the 3rd；42- side supports long；43- short side supports；The screwed holes of 44- second；45- second
Through hole；
Outer layer cylinder -51；52- inner layer cylinders；53- annular regions；54- square boxs.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific reality
Example is applied, and referring to the drawings, the present invention is described in more detail.
Capacitance tomography system generally comprises sensor, measurement and data acquisition circuit and imaging is calculated
Machine three parts, sensor is the uniform some electric capacity pasted on the outside of the pipeline or cavity of flow of fluid
Pole plate, any two capacitor plate can constitute 1 two-terminal electric capacity, multiphase flow in pipeline or cavity
The change of the phase concentration of dynamic medium can cause change in dielectric constant between capacitor plate, so as to cause capacitance
Minor variations, the capacitance between each pole plate contains the information relevant with phase concentration, measurement and number
Press certain according to the capacitance between Acquisition Circuit collection plates of similar polarity combination and by value feeding tomography computer
Algorithm carries out image reconstruction, it is possible to obtain the multithread phase parameter of pipeline or cavity cross-section.The present invention is just
There is provided a kind of capacitance tomography sensor added with built-in electrode device.
Drum type brake fluid bed with mozzle is the conventional equipment of chemistry, pharmacy, food industry, band
The drum type brake fluid bed for having mozzle has bed body and a mozzle being arranged concentrically with bed body, bed body and leads
Annular region is formed between flow tube, the drum type brake stream with mozzle is present invention can be suitably applied to but be not limited to
The imaging of annular region, as shown in Figure 1 and Figure 2, its point are formed between the bed body and mozzle of changing bed
Top view, the sectional view of a kind of imaging region that of the invention Biao Shi be applicable.Imaging region is outer layer
The annular region 53 that cylinder 51 and inner layer cylinder 52 are surrounded, outer layer cylinder 51 and inner layer cylinder 52
Can be the bed body and mozzle of the drum type brake fluid bed with mozzle, annular region 53 can be
Annular region between bed body and mozzle.
In the first embodiment of the invention, capacitance tomography sensor includes：First outer shield cover
11st, the first outer electrode group, internal layer electrode group, the built-in electrode group of inner shield 14 and first.
First outer electrode group, it includes N block first electrodes piece 12, N block first electrodes piece 12 it
Between spaced apart, the uniform outer wall for being close to outer layer cylinder 51, the first outer shield cover 11 covers
Lid first electrode piece 12 and outer layer barrel, internal layer electrode group, it includes M block second electrodes piece 13,
It is spaced apart between M block second electrodes piece 13, be uniformly close to the first outer electrode group just
To inner layer cylinder 52 inwall, the covering of inner shield 14 second electrode piece 13 and inner layer cylinder 52,
First built-in electrode group is located between outer layer cylinder 51 and inner layer cylinder 52, just to the first outer electrode
The annular region 53 of group and internal layer electrode group, it is included along the radial direction of annular region 53, in annular
Equally distributed K electrode unit in region 53, electrode unit includes one the 3rd electrode slice 15 and chi
Outer layer circle is fixed at very little the first protecting frame 16 for being more than the 3rd electrode slice 15, the two ends of the first protecting frame 16
Cylinder 51 and inner layer cylinder 52.Wherein N take 8,12 or 16, M and K take 4.
The capacitance tomography sensor is applicable to the imaging of annular region 53, and first built-in
The presence of electrode group improves the imaging precision of capacitance tomography sensor.
Fig. 3 shows the capacitance tomography sensor of first embodiment of the invention, it is open and flat after first
Electrode slice 12 and second electrode piece 13 are as shown in Figure 4.
Wherein, for height h is identical, width w after first electrode piece 12 is open and flat with second electrode piece 13
The rectangle pole plate that may be the same or different.It is rectangular flat after first outer shield cover 11 is open and flat, its
It is made of soft bent scale copper, the thickness of rectangular flat is 0.3-0.5mm, its length ratio
The outer wall Zhou Chang great 20-30mm of outer layer cylinder 51, its width is higher than the height h of rectangle pole plate
20-30mm。
The N takes 8, and the first outer electrode group is made up of 8 pieces of first electrode pieces 12, first electrode
The material of piece 12 is copper.The M takes 4, and internal layer electrode group is made up of 4 pieces of second electrode pieces 13, the
The material of two electrode slice 13 is copper.
It is rectangular flat after inner shield 14 is open and flat, it uses soft bent scale copper to be made,
, than the inwall Zhou Chang great 20-30mm of inner layer cylinder 52, its width is than rectangle electricity for the length of rectangular flat
The height h 20-30mm high of pole.
The K takes 4, and the first built-in electrode group includes 4 electrode units, around inner layer cylinder 52
Outer wall into right-angled intersection, the 3rd electrode slice 15 is and first electrode piece 12 and second electrode piece 13
Height h it is identical, width less than or equal to annular region 53 width rectangle pole plate, first protection
Frame 16 is the flat board with chamfering that two pieces of nonmetallic materials make, and slab-thickness is 5-10mm, its
Highly more than the height h of the 3rd electrode slice 15, its width is equal to the width of annular region 53, flat board
Between use glue sticking, the 3rd electrode slice 15 is sandwiched in centre, two ends are pasted on outer layer cylinder 51 and interior
Layer cylinder 52.3rd electrode slice 15 aligns with the side of the first electrode piece 12 on the right side of it, and and its
The side alignment of the second electrode piece 13 on right side, the first built-in electrode group causes that capacitance chromatography imaging is passed
The imaging precision of sensor is greatly improved.The two ends of first protecting frame 16 also can be by riveting, snapping connection
Outer layer cylinder 51 and inner layer cylinder 52 are fixed on etc. mode.
In figure 3, first can also be fixed between the first outer shield cover 11 and outer layer barrel
Frame 31, first support 31 is made up of two identical semi-circular brackets 32 as shown in Figure 10, two
First screwed hole 33 of the junction of semi-circular bracket 32 is fixed on outer layer cylinder 51 by mode connects for screw
Outer wall, and covered by the first outer shield cover 11, the wire of connection first electrode piece 12 is by semicircle
First through hole 34 on shape support 32 is drawn.
Second support, second support can also be fixed between inner shield 14 and inner layer cylinder 52
It is made up of two identical semi-circular brackets 32, two the first screwed holes of the junction of semi-circular bracket 32
33 by mode connects for screw, is close to the inwall of inner layer cylinder 52, and is covered by inner shield 14, connection
The wire of second electrode piece 13 is drawn by the first through hole 34 in semi-circular bracket 32.
Fig. 5 shows another capacitance tomography sensor of first embodiment of the invention, the N
12 are taken, capacitance tomography sensor of remaining feature with Fig. 3 is identical；Fig. 6 shows the present invention
Another capacitance tomography sensor of first embodiment, the N takes 16, remaining feature with
The capacitance tomography sensor of Fig. 3 is identical.
In the second embodiment of the present invention, in the base of the capacitance tomography sensor of first embodiment
On plinth, the first outer electrode group first electrode piece 12 of adjustment fits in the position of the outer wall of outer layer cylinder 51,
Adjustment internal layer electrode group second electrode piece 13 fits in the position of the inwall of inner layer cylinder 52 so that first
Outer electrode group and internal layer electrode group are symmetrical on the first built-in electrode group, to form second embodiment
Capacitance tomography sensor.
Fig. 7 shows the capacitance tomography sensor of second embodiment of the invention, and it is by shown in Fig. 3
Capacitance tomography sensor the first outer electrode group first electrode piece 12 it is mobile clockwise
/ 2nd of the angle being spaced between first electrode piece 12, and fit in the outer wall of outer layer cylinder 51,
The second electrode piece 13 of internal layer electrode group is moved what is be spaced between second electrode piece 13 clockwise
/ 2nd of angle, and fit in the inwall of inner layer cylinder 52 so that each the 3rd electrode slice 15 with
The midpoint of the first electrode piece 12 of its left and right sides and the midpoint of the second electrode piece 13 of its left and right sides
Alignment, the first outer electrode group and internal layer electrode group are symmetrical on the first built-in electrode group, further
Improve the imaging precision of capacitance tomography sensor.
Fig. 8 shows another capacitance tomography sensor of second embodiment of the invention, and it will figure
The equal up time of first electrode piece 12 of the first outer electrode group of the capacitance tomography sensor shown in 5
Pin moves 1/2nd of the angle being spaced between first electrode piece 12, and fits in outer layer cylinder
51 outer walls, second electrode piece 13 is moved by the second electrode piece 13 of internal layer electrode group clockwise
Between be spaced 1/2nd of angle, and fit in the inwall of inner layer cylinder 52 so that each the 3rd
Midpoint of the electrode slice 15 with the first electrode piece 12 of its left and right sides and the second electrode of its left and right sides
The midpoint alignment of piece 13, the first outer electrode group and internal layer electrode group are on the first built-in electrode group
Symmetrically, the imaging precision of capacitance tomography sensor is further increased.
Fig. 9 shows another capacitance tomography sensor of second embodiment of the invention, and it will figure
The equal up time of first electrode piece 12 of the first outer electrode group of the capacitance tomography sensor shown in 6
Pin moves 1/2nd of the angle being spaced between first electrode piece 12, and fits in outer layer cylinder
51 outer walls, second electrode piece 13 is moved by the second electrode piece 13 of internal layer electrode group clockwise
Between be spaced 1/2nd of angle, and fit in the inwall of inner layer cylinder 52 so that each the 3rd
Midpoint of the electrode slice 15 with the first electrode piece 12 of its left and right sides and the second electrode of its left and right sides
The midpoint alignment of piece 13, the first outer electrode group and internal layer electrode group are on the first built-in electrode group
Symmetrically, the imaging precision of capacitance tomography sensor is further increased.
In the above-described embodiments, two companies of flat board of the first protecting frame 16 of the first built-in electrode group
Connecing can be using punching, bolted form.
The present invention could be applicable to the imaging in square box region, in third embodiment of the invention, electric capacity
Tomography sensor includes：Second outer shield cover 21, the second outer electrode group and the second in-built electrical
Pole group.
Second outer electrode group, it includes the electrode slice 22 of N blocks the 4th, the electrode slice 22 of N blocks the 4th it
Between spaced apart, the uniform outer wall for being close to square box 54, the second outer shield cover 21 covers
4th electrode slice 22 and the outer wall of square box 54, the second built-in electrode group include one parallel to square box 54
One frame and just to the electrode unit of the second outer electrode group, electrode unit includes that P is separated by a spacing
From second protecting frame 26 of the 5th electrode slice 23 and size more than the 5th electrode slice 23 of head and the tail arrangement,
The 4th electricity that the frame of the square box 54 number P of wherein the 5th electrode slice 23 parallel with it is fitted
The number of pole piece 22 is identical, and two frames of square box 54 are fixed at the two ends of the second protecting frame 26.
The capacitance tomography sensor is applicable to the imaging of square region, and the second built-in electrode group
In the presence of the imaging precision that improve capacitance tomography sensor, N takes 8,12 or 16.
Figure 11 shows the capacitance tomography sensor of third embodiment of the invention, and the N takes 16,
Two sides long of square box 54 are symmetrically and evenly distributed 12 piece of the 4th electrode slice 22, and two short sides symmetrically and evenly divide
4 piece of the 4th electrode slice 22 of cloth, the second built-in electrode group is also to be spliced by two block protection plates, protection
The material of plate is identical with the protection plate material in the first built-in electrode device, and its length is parallel with it
The equal length of the short side of square box 54, uses gluing knot between protection board, two ends are pasted on square box
54 liang of long margin frames, the number P of the 5th electrode slice 23 is 2, on the short side of square box 54 parallel with it
Electrode slice number it is equal.
In fig. 11, can also be fixed between the second outer shield cover 21 and the outer wall of square box 54
3rd support 41, the 3rd support 41 by two as shown in fig. 13 that side support 42 long and two as schemed
Short side support 43 shown in 13 is constituted, and it is corresponding with the side long of square box 54 and short side respectively, side branch long
Second screwed hole 44 of frame 42 and the junction of short side support 43 is fixed on square box by mode connects for screw
54 outer wall, and covered by the second outer shield cover 21, the wire of the 4th electrode slice 22 is connected by growing
The second through hole 45 on side support 42 and short side support 43 is drawn.
Figure 12 shows another capacitance tomography sensor of third embodiment of the invention, the N
8 are taken, capacitance tomography sensor of remaining feature with Figure 11 is identical, two length of square box 54
Side is symmetrically and evenly distributed 6 piece of the 4th electrode slice 22, and two short sides are symmetrically and evenly distributed 2 piece of the 4th electrode slice
22, the number P of the 5th electrode slice 23 are 1.Third embodiment of the invention another capacitance chromatographic into
As in sensor, the N takes 12, remaining feature with the capacitance tomography sensor phase of Figure 11
Together.
Second built-in electrode group of above-mentioned capacitance tomography sensor improves capacitance chromatography imaging biography
The imaging precision of sensor, and the second built-in electrode group simple structure, processing capacity are small, time saving and energy saving,
It is convenient to install.
Figure 14 represent capacitance tomography sensor imaging effect shown in Fig. 3 of the present invention, 5 and 6 with
And the capacitance chromatography imaging sensing of the corresponding inside and outside duallayered electrode structure without the first built-in electrode group
Device imaging effect；Figure 15 represents the capacitance tomography sensor imaging effect shown in Fig. 7,8 and 9
And the capacitance chromatography imaging of the corresponding inside and outside duallayered electrode structure without the first built-in electrode group is passed
Sensor imaging effect；Table 1 is the coefficient correlation of above-mentioned capacitance tomography sensor imaging.From table 1
This it appears that the imaging effect of the capacitance tomography sensor with built-in electrode group is better than
The corresponding capacitance tomography sensor without built-in electrode group.
Table 1
Figure 16 is the imaging results of capacitance tomography sensor shown in Figure 11 and 12.Can from Figure 16
Significantly to find out, two articles do not have " to connect in the imaging effect figure of the sensor with built-in electrode group
Touch ", the released state of two articles is presented, and be free of the imaging effect of the sensor of built-in electrode group
There is " contact " two articles in fruit figure.Table 2 shows and the corresponding coefficient correlation of imaging effect figure.Phase
Close quantifies support Figure 16 in imaging effect quality, have built-in electrode group sensor into
The imaging coefficient correlation of the sensor without built-in electrode group is all higher than as coefficient correlation, is embodied good
Imaging effect.
Table 2
| Coefficient correlation | 8 | 16 |
| Group containing built-in electrode | 0.52 | 0.59 |
| Without built-in electrode group | 0.50 | 0.54 |
So far, combined accompanying drawing has been described in detail to the present embodiment.According to above description, this
Art personnel should have to a kind of capacitance tomography sensor of the invention and clearly recognize.
It should be noted that in accompanying drawing or specification text, the implementation for not illustrating or describing,
Form known to a person of ordinary skill in the art in art is, is not described in detail.Additionally,
The above-mentioned definition to each element is not limited in embodiment various concrete structures, shape or the side for mentioning
Formula, those of ordinary skill in the art can simply be changed or be replaced to it, for example：
(1) built-in electrode group can be also used for the imaging interval of other type equipments；
(2) direction term mentioned in embodiment, for example " on ", D score, "front", "rear", " left side ",
" right side " etc., is only the direction of refer to the attached drawing, not for limiting the scope of the invention；
(3) above-described embodiment can be based on design and reliability consideration, be mixed with each other collocation use or
Used with other embodiment mix and match, i.e., the technical characteristic in different embodiments can be with independent assortment shape
Into more embodiments.
In sum, the present invention provides a kind of capacitance tomography sensor, and imaging precision is high, structure
Simply, it is easy to process, it is easy for installation.
Particular embodiments described above, is carried out to the purpose of the present invention, technical scheme and beneficial effect
Further describe, should be understood that the foregoing is only specific embodiment of the invention and
, be not intended to limit the invention, it is all within the spirit and principles in the present invention, done any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of capacitance tomography sensor, it includes：Outer shield cover, outer electrode group and
Built-in electrode group, wherein,
Outer electrode group, it includes N block outer electrode pieces, is spaced between N block outer electrode pieces certain
Distance, be uniformly close to pipeline outer wall, N takes 8,12 or 16；
Outer shield cover, its covering outer electrode piece and pipeline outer wall；
Built-in electrode group, it includes electrode unit, and electrode unit includes in-built electrical pole piece and protecting frame,
Protecting frame is flat board of two block sizes more than in-built electrical pole piece, and in-built electrical pole piece is sandwiched in centre by it, its
Inner-walls of duct is fixed at two ends.
2. capacitance tomography sensor as claimed in claim 1, it is characterised in that also include：
Internal layer electrode group and inner shield (14)；
First outer electrode group, it includes N block first electrodes piece (12), N block first electrodes piece (12)
Between spaced apart, the uniform outer wall for being close to outer layer cylinder (51)；First outer shield cover
(11) covering first electrode piece (12) and outer layer barrel (51)；Internal layer electrode group, it includes M
Block second electrode piece (13), it is spaced apart between M block second electrodes piece (13), uniform tight
Be attached to the first outer electrode group just to inner layer cylinder (52) inwall；Inner shield (14) covers
Lid second electrode piece (13) and inner layer cylinder (52)；First built-in electrode group is located at outer layer cylinder (51)
And inner layer cylinder (52) between, just to the annular region (53) of the first outer electrode group and internal layer electrode group,
It is included along annular region (53) radial direction, equally distributed K in annular region (53)
Electrode unit, electrode unit includes one the 3rd electrode slice (15) and the first protecting frame (16), first
Protecting frame (16) is flat board of two block sizes more than the 3rd electrode slice, and outer layer cylinder is fixed at its two ends
(51) and inner layer cylinder (52), M and K takes 4, and the first built-in electrode group includes 4 electrode lists
Unit, the outer wall around inner layer cylinder (52) is into right-angled intersection.
3. capacitance tomography sensor as claimed in claim 2, it is characterised in that
3rd electrode slice (15) and the midpoint of the first electrode piece (12) of its left and right sides and its left and right
The midpoint alignment of the second electrode piece (13) of both sides, the first outer electrode group and internal layer electrode group are closed
It is symmetrical in the first built-in electrode group.
4. capacitance tomography sensor as claimed in claim 2, it is characterised in that
For highly identical, width is identical after first electrode piece (12) and second electrode piece (13) are open and flat
Or different rectangular coppers；And/or first outer shield cover (11) it is open and flat after be soft bent square
Shape scale copper flat board, the thickness of thin rectangular copper plate flat board is 0.3-0.5mm, and its length is than outer layer cylinder
(51) outer wall Zhou Chang great 20-30mm, its width is higher than the height of first electrode piece (12)
20-30mm；And/or the open and flat rear thin rectangular copper plate flat board bent for softness of inner shield (14),
The length of thin rectangular copper plate flat board than inner layer cylinder (52) inwall Zhou Chang great 20-30mm, its width
Than the height h 20-30mm high of first electrode piece (12).
5. capacitance tomography sensor as claimed in claim 4, it is characterised in that
3rd electrode slice (15) is the height with first electrode piece (12) and second electrode piece (13)
Identical, width is less than or equal to the rectangular copper of the width of annular region (53), the first protecting frame (16)
For the flat board with chamfering that two pieces of nonmetallic materials make, slab-thickness is 5-10mm, and it is highly
More than the height of the 3rd electrode slice (15), its width is equal to the width of annular region (53), flat board
Between use glue sticking, the 3rd electrode slice (15) is sandwiched in centre, two ends are pasted on outer layer cylinder (51)
With inner layer cylinder (52).
6. capacitance tomography sensor as claimed in claim 2, it is characterised in that
First support (31) is fixed between first outer shield cover (11) and outer layer barrel (51),
First support (31) is made up of two identical semi-circular brackets (32), two semi-circular brackets (32)
First screwed hole (33) of junction is fixed on the outer wall of outer layer cylinder (51) by mode connects for screw,
And by the covering of the first outer shield cover (11), the wire of connection first electrode piece (12) is by semicircle
First through hole (34) on support (32) is drawn.
7. capacitance tomography sensor as claimed in claim 2, it is characterised in that
Second support, second support are fixed between inner shield (14) and inner layer cylinder (52)
It is made up of two identical semi-circular brackets (32), two the first of semi-circular bracket (32) junction
Screwed hole (33) is close to the inwall of inner layer cylinder (52) by mode connects for screw, and by inner shield
(14) cover, the wire of connection second electrode piece (13) is by first in semi-circular bracket (32)
Through hole (34) is drawn.
8. capacitance tomography sensor as claimed in claim 5, it is characterised in that in first
Two flat boards of the first protecting frame (16) of electrode group are put using punching, bolt connection.
9. capacitance tomography sensor as claimed in claim 1, it is characterised in that
Second outer electrode group, it includes the electrode slice (22) of N blocks the 4th, the electrode slice (22) of N blocks the 4th
Between outer wall that is spaced apart, being uniformly close to square box (54), the second outer shield cover (21)
The 4th electrode slice (22) and square box (54) outer wall are covered, the second built-in electrode group includes that one is parallel
In the frame of square box (54) one and just to the electrode unit of the second outer electrode group, electrode unit includes
P the 5th electrode slice (23) and the second protecting frame (26) of head and the tail arrangement separated by a distance, wherein
Square box (54) frame number P of the 5th electrode slice (23) parallel with it fitted the 4th
The number of electrode slice (22) is identical, and the second protecting frame (26) is more than the 5th electrode slice for two block sizes
(23) two frames of square box (54) are fixed at flat board, its two ends, and N takes 8,12 or 16.
10. capacitance tomography sensor as claimed in claim 9, it is characterised in that
Second outer shield cover (21) is close to the 4th electrode slice (22) and square box (54) outer wall；
Or second be fixed with the 3rd support (41) between outer shield cover (21) and square box (54) outer wall,
3rd support (41) is made up of two side supports (42) long and two short side supports (43), its point
Not corresponding with square box (54) side long and short side, side support (42) long and short side support (43) are even
Second screwed hole (44) at place is connect by mode connects for screw, the outer wall of square box (54), and quilt is fixed on
Second outer shield cover (21) is covered, and connects the wire of the 4th electrode slice (22) by side support (42) long
Drawn with the second through hole (45) on short side support (43).
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| CN108195896A (en) * | 2017-12-05 | 2018-06-22 | 浙江大学 | A kind of staggered electrode formula capacitance chromatography imaging device applied to cryogen |
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| CN111272834A (en) * | 2020-03-02 | 2020-06-12 | 太原理工大学 | Nested capacitance tomography sensor and image data acquisition method |
| CN114527231A (en) * | 2021-12-28 | 2022-05-24 | 中国矿业大学 | Combustion empty area measuring device based on electric capacity tomography |
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| CN111272834B (en) * | 2020-03-02 | 2022-10-28 | 太原理工大学 | Nested capacitance tomography sensor and image data acquisition method |
| CN114527231A (en) * | 2021-12-28 | 2022-05-24 | 中国矿业大学 | Combustion empty area measuring device based on electric capacity tomography |
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