CN112345169B - Neutron scattering imaging system for detecting tightness of glass curtain wall and application thereof - Google Patents
Neutron scattering imaging system for detecting tightness of glass curtain wall and application thereof Download PDFInfo
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- CN112345169B CN112345169B CN202011334059.6A CN202011334059A CN112345169B CN 112345169 B CN112345169 B CN 112345169B CN 202011334059 A CN202011334059 A CN 202011334059A CN 112345169 B CN112345169 B CN 112345169B
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- 239000011521 glass Substances 0.000 title claims abstract description 81
- 238000001956 neutron scattering Methods 0.000 title claims abstract description 24
- 238000003384 imaging method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 16
- 239000000523 sample Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 239000000565 sealant Substances 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 241000252254 Catostomidae Species 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/005—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using neutrons
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Abstract
The invention discloses a neutron scattering imaging system for detecting tightness of a glass curtain wall and application thereof, relating to the technical field of nondestructive detection, comprising a neutron detector with a detection window facing the glass curtain wall and vertical to the glass curtain wall, wherein the neutron detector is fixedly arranged on a driving platform of a vertical driving assembly capable of driving the neutron detector to reciprocate in a direction vertical to the glass curtain wall, the vertical driving assembly is fixedly arranged on a driving platform of a horizontal driving assembly which is arranged in parallel with the glass curtain wall and can drive the glass curtain wall to horizontally reciprocate, the horizontal driving assembly is arranged on a mounting frame, the mounting frame is adsorbed on the glass curtain wall through a plurality of adjustable suckers, a driving host is fixedly arranged on the mounting frame, the driving host is connected with a neutron detector through a 485 bus, and the driving host is in signal connection with a remote control end; the invention can effectively detect the sealing position of the glass curtain wall and improve the detection precision.
Description
Technical Field
The invention relates to the field of nondestructive detection, in particular to a neutron transmission imaging system for detecting tightness of a glass curtain wall.
Background
Along with the development of society modernization, people have increasingly high requirements on building comfort, and the structure of glass curtain wall capable of improving indoor transmittance is widely applied to various large public buildings, such as a high-speed railway waiting hall, airport terminal building, hospitals and the like. In the design and construction process of the glass curtain wall, more structural safety is generally considered, and insufficient importance is attached to the necessary measures to be taken for the sealing design of the curtain wall. The current energy-saving standard has clear requirements on the energy-saving index of the glass curtain wall, and the tightness of the glass curtain wall directly influences the energy-saving index of the glass curtain wall. In addition, the problem of rain leakage caused in the building when the tightness of the glass curtain wall is poor not only affects the comfort level of the building, but also affects the safety problem of people. The sealing colloid of the glass curtain wall in a large public place is aged along with time, the sealing performance is poorer and poorer, and urgent requirements are also provided for detection.
The tightness detection of the glass curtain wall is not mature and reliable except for the tightness detection test carried out in a laboratory.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a neutron scattering imaging system for detecting the tightness of a glass curtain wall, so as to solve the technical problem that no mature equipment for detecting the tightness of the glass curtain wall exists in the prior art.
The invention is realized by the following technical scheme:
The invention provides a neutron scattering imaging system for detecting tightness of a glass curtain wall, which comprises a neutron detector, wherein a detection window faces the glass curtain wall and is vertical to the glass curtain wall, the neutron detector is fixedly arranged on a driving platform of a vertical driving assembly capable of driving the neutron detector to reciprocate in a direction vertical to the glass curtain wall, the vertical driving assembly is fixedly arranged on the driving platform of a horizontal driving assembly which is parallel to the glass curtain wall and can drive the glass curtain wall to horizontally reciprocate, the horizontal driving assembly is arranged on a mounting frame, the mounting frame is adsorbed on the glass curtain wall through a plurality of adjustable suckers, a driving host is fixedly arranged on the mounting frame, the driving host is connected with the neutron detector through a 485 bus, and the driving host is in signal connection with a remote control end.
Further, the neutron detector comprises a detector main board, and a neutron source module and a thermal neutron detector module which are respectively connected with the detector main board.
Further, the driving host comprises an embedded core board, a first lithium battery power supply, a motor driving module and a first wireless receiving and transmitting module which are respectively connected with the embedded core board, and the detector main board is connected with the embedded core board through a 485 bus.
Further, the remote control end comprises a control main board, a second lithium battery power supply, a second wireless transceiver module and a display, wherein the second lithium battery power supply, the second wireless transceiver module and the display are respectively connected with the control main board.
Further, the mounting frame is specifically formed by two U-shaped frames with openings facing downwards and respectively arranged at two ends of the horizontal driving assembly, and an adjustable sucking disc is respectively arranged at the bottom of each U-shaped frame.
Further, each U-shaped frame is movably connected with the horizontal driving assembly through a connecting piece.
Further, the adjustable sucking disc is connected with the adjusting piece capable of adjusting the distance between the adjustable sucking disc and the bottom of the U-shaped frame.
The invention also provides a method for detecting the tightness of the glass curtain wall by using the system, which comprises the following steps:
Step 1, firstly, adsorbing a mounting frame and components on the mounting frame on a glass curtain wall through an adjustable sucking disc, enabling a horizontal driving assembly to be parallel to a detected sealing strip on the glass curtain wall, and enabling a detection window of a neutron detector to be positioned right above the sealing strip;
Step 2, continuously sprinkling water for a period of time on the detection area, and airing;
step 3, the remote control end controls the vertical driving assembly to drive the neutron detector to move to a set vertical distance between the neutron detector and the glass curtain wall through the driving host;
step 4, defining a detection area, determining a detection origin, detecting an end point, detecting the length H and the horizontal movement step length dH of the neutron detector;
step 5, the remote control end controls the horizontal driving assembly through the driving host machine to drive the neutron detector to move to the detection origin, and then the probe of the neutron detector performs primary neutron irradiation and thermal neutron scattering acquisition to obtain thermal neutron single scattering imaging p 1 of the section of the probe of the neutron detector;
S6, the remote control end controls the horizontal driving assembly to drive the neutron detector to move dH distance towards the detection end point through the driving host, neutron irradiation and thermal neutron scattering collection are carried out once again, single scattering imaging p 2 is obtained, dH=U/2, and U is the side length of the square cross section of the neutron detector probe;
S7, moving the dH distance forwards again, and repeatedly detecting neutrons until the detection length scanning is completed, so as to form a row of continuous thermal neutron scattering patterns p m, m=1-M, and M=H/dH+1;
S8, constructing a new blank image P, wherein the size of the blank image P is (M+1) Xd (H/2) 2, dividing the blank image P into M+1 sub-blocks, and the sub-blocks are represented by P i, and i=1 to M+1;
S9, dividing each p m into two halves of sub-images equally, wherein the front half part is p i,f, and the rear half part is p i,b;
S10, making:
Obtaining a new image P
S10, performing two-dimensional filtering on the new image P to form a final image P ', and identifying residual moisture in the glass frame sealant in the detection area through the image P', so as to judge whether the tightness of the glass is good.
Further, the method further comprises:
1) Before formal detection, neutron radiation dose is set, and the dose is uniformly used in the detection process;
2) Neutron scattering calibration is carried out on a field standard sample, scattering data of the standard sample are obtained, uniformity of an image P 'is observed, and differences between the standard image P' and a standard value are compared, and if the image is uneven or a thermal neutron high-density region continuously distributed in the image exists, the existence of a residual moisture abnormal region in the glass frame sealant can be determined.
Compared with the prior art, the invention has the following advantages:
1) The neutrons can easily penetrate through the electronic layer because the neutrons are non-charged, so the neutrons can easily penetrate through the aluminum alloy frame when irradiating the aluminum alloy frame of the glass curtain wall, and collide with the high polymer sealant and the hydrogen atoms of water remained in the glass curtain wall to form scattering. According to the invention, fast neutrons are continuously and automatically emitted and thermal neutrons are detected on the surface of the glass to be detected along the glue filling gap, when the distribution density of neutron images detected at a certain part is obviously higher than that of neutrons under the same condition, the problem of high water content in the area can be judged, the problem of tightness can be judged, and compared with the traditional manual inspection method, the accuracy and the working efficiency are greatly improved.
2) Compared with infrared temperature detection, the invention can only detect the temperature difference of the surface and can not reflect the internal condition of the glass cement, but can position the gap in the glass cement and provide the magnitude and the magnitude, and has high reliability.
3) The invention does not need other pre-embedded sensors or other auxiliary procedures, does not interfere the construction procedure, and has good applicability.
4) The invention uses the continuous automatic scanning imaging technology, and has higher practicability than the prior single-point neutron scattering equipment in other fields.
Drawings
FIG. 1 is a schematic view of the apparatus in embodiment 1;
FIG. 2 is a schematic diagram showing the connection of circuit elements in the system of embodiment 1;
FIG. 3 is a schematic diagram of the structure of the detection object in embodiment 3;
FIG. 4 is a schematic diagram of the detection result in example 3;
In the figure: 1. a neutron detector; 2. a vertical drive assembly; 3. a horizontal drive assembly; 4. a mounting frame; 5. an adjustable suction cup; 6. driving a host; 7. a remote control end; 8. a detector motherboard; 9. a neutron source module; 10. a thermal neutron detector module; 11. an embedded core board; 12. a first lithium battery power supply; 13. a motor driving module; 14. a first wireless transceiver module; 15. a control main board; 16. a second lithium battery power supply; 17. a second wireless transceiver module; 18. a display.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
In combination with fig. 1, this embodiment provides a neutron scattering imaging system for detecting glass curtain wall tightness, including the detection window towards glass curtain wall and its vertically neutron detector 1 (neutron detector 1 is used for transmitting neutrons and receiving collected thermal neutrons simultaneously, obtain corresponding thermal neutron density), in order to be convenient for adjust the distance between neutron detector 1 and the sealant on the glass curtain wall, make neutron detector 1 fixed on the drive platform of the vertical drive assembly 2 that can drive it to reciprocate in the direction of perpendicular to glass curtain wall in this embodiment, vertical drive assembly 2 fixed mounting is on the drive platform of the horizontal drive assembly 3 that sets up with glass curtain wall parallel and can drive it to carry out horizontal reciprocating motion, horizontal drive assembly 3 installs on mounting bracket 4, mounting bracket 4 adsorbs on the glass curtain wall through a plurality of adjustable sucking discs 5, still fixed mounting has driving host computer 6 on mounting bracket 4, driving host computer 6 passes through 485 bus connection with neutron detector 1, driving host computer 6 and remote control end 7 signal connection.
Through the arrangement, the distance between the detection window of the neutron detector 1 and the sealing strip on the glass curtain wall can be adjusted through the vertical driving assembly 2 as required, meanwhile, the vertical driving assembly 2 and the neutron detector 1 can be driven to horizontally move through the horizontal driving assembly 3, so that the movement can be carried out along the trend of the sealing rubber strip (the sealing rubber strip of the glass curtain wall is of a straight strip-shaped structure and is narrow in width, so that only the neutron detector 1 needs to linearly move along the extending direction of the sealing rubber strip), and meanwhile, the information of the thermal neutron density acquired by the neutron detector 1 is transmitted to the remote control end 7 through the driving host 6, and the remote control end 7 can effectively acquire the corresponding thermal neutron density information; meanwhile, the installation frame 4 can effectively support equipment such as the driving host 6, and the like, and the plurality of adjustable suckers 5 can effectively adsorb the equipment on the installation frame on the glass curtain wall, so that a stable operation environment is provided for testing.
The working principle of the equipment is as follows:
The invention utilizes that neutrons are non-chargeable and can easily penetrate through an electronic layer, so that neutrons can easily penetrate through the aluminum alloy frame when irradiating the aluminum alloy frame of the glass curtain wall, and collide with high polymer sealant and hydrogen atoms in residual water inside to form scattering. According to the invention, fast neutrons are continuously and automatically emitted and thermal neutrons are detected in a straight line along the glue filling gap on the surface of the glass to be detected, and when the neutron distribution density detected at a certain part is obviously higher than that of neutrons under the same condition, the problem of high water content in the area can be judged, and the problem of tightness can be judged.
In particular, in the present embodiment, the neutron detector 1 includes a detector main board 8 and a neutron source module 9 and a thermal neutron detector module 10 respectively connected thereto.
In particular, in the present embodiment, the driving host 6 includes an embedded core board 11, and a first lithium battery power source 12, a motor driving module 13 and a first wireless transceiver module 14 respectively connected to the embedded core board 11, and the detector main board 8 is connected to the embedded core board 11 through a 485 bus.
In particular, in the present embodiment, the remote control terminal 7 includes a control main board 15, and a second lithium battery power source 16, a second wireless transceiver module 17 and a display 18 respectively connected thereto.
In particular, in this embodiment, the mounting frame 4 is specifically formed by two U-shaped frames with openings facing downwards and respectively disposed at two ends of the horizontal driving assembly 3, and an adjustable suction cup 5 (specifically, suction-adjustable suction cup) is respectively mounted at the bottom of each U-shaped frame.
Particularly, in this embodiment, in order to enable the apparatus to adapt to glass curtain walls of various sizes, each U-shaped frame is movably connected with the horizontal driving assembly 3 through a connecting piece, that is, the horizontal driving assembly 3 is adjustably connected with the U-shaped frame through the connecting piece, so that the relative position between the two U-shaped frames can be adjusted, thereby shortening or expanding the distance between the two U-shaped frames, facilitating the whole erection of the apparatus to be adsorbed on glass curtain walls corresponding to different dimensions, the connecting piece can be a combination of a sleeve piece and a locking bolt, the sleeve piece is fixedly installed at the bottom of the top end of the U-shaped frame, the horizontal driving assembly 3 is arranged therein, the locking bolt is in threaded connection with the bottom of the sleeve piece, the top end of the locking screw is tightly fixed with the horizontal driving assembly 3, and the bottom end of the locking screw is provided with the outer side of the sleeve piece, thereby facilitating the adjustment of the corresponding position.
In particular, in this embodiment, to facilitate leveling, the adjustable suction cup 5 is connected by an adjusting member that adjusts the distance between it and the bottom of the U-shaped frame.
In particular, in this embodiment, the vertical driving assembly and the horizontal driving assembly can only drive the corresponding devices to perform linear reciprocating motion, and can both be set as a synchronous belt linear module sliding table, or can be in other structures, for example, in this embodiment, the horizontal driving assembly is composed of a guide i-beam with a sliding chute on one side and a synchronous belt in the sliding chute, and a driving platform sleeved on the i-beam and provided with a servo motor for driving the driving platform to slide on the i-beam, and the vertical driving assembly is composed of a vertical sliding wire guide rail fixedly installed on the driving platform, a servo motor, and the like.
Particularly, all mainboards in the embodiment are STM32F103 embedded ARM main control units, and all wireless transceiver modules are 433MHz wireless transceiver units.
In order to facilitate visual inspection of the detection results, the invention also provides the following embodiments
Example 2
This embodiment provides a method for testing the tightness of a glass curtain wall by using the apparatus of embodiment 1, comprising the following steps:
Firstly, adsorbing a mounting frame 4 and components on the mounting frame on a glass curtain wall through an adjustable sucking disc 5, enabling a horizontal driving assembly 3 to be parallel to a detected sealing strip on the glass curtain wall, and enabling a detection window of a neutron detector 1 to be opposite to the sealing strip;
Step 2, continuously sprinkling water for a period of time on the detection area, and airing;
Step 3, the remote control end 7 controls the vertical driving assembly 2 through the driving host 6 to drive the neutron detector 1 to move to a set vertical distance between the neutron detector and the glass curtain wall;
step 4, defining a detection area, determining a detection origin, detecting an end point, detecting the length H and the horizontal movement step length dH of the neutron detector 1;
Step 5, the remote control end 7 controls the horizontal driving assembly 3 through the driving host 6 to drive the neutron detector 1 to move to a detection origin, and then the probe of the neutron detector 1 performs neutron irradiation and thermal neutron scattering acquisition to obtain thermal neutron single scattering imaging p 1 of the probe section of the neutron detector 1;
S6, a remote control end 7 controls a horizontal driving assembly 3 through a driving host 6 to drive a neutron detector 1 to move dH distance towards a detection end point, neutron irradiation and thermal neutron scattering acquisition are carried out once again, a single scattering imaging p 2 is obtained, dH=U/2, and U is the side length of a square cross section of a probe of the neutron detector 1;
S7, moving the dH distance forwards again, and repeatedly detecting neutrons until the detection length scanning is completed, so as to form a row of continuous thermal neutron scattering patterns p m, m=1-M, and M=H/dH+1;
S8, constructing a new blank image P, wherein the size of the blank image P is (M+1) Xd (H/2) 2, dividing the blank image P into M+1 sub-blocks, and the sub-blocks are represented by P i, and i=1 to M+1;
S9, dividing each p m into two halves of sub-images equally, wherein the front half part is p i,f, and the rear half part is p i,b;
S10, making:
Obtaining a new image P
S10, performing two-dimensional filtering on the new image P to form a final image P ', and identifying residual moisture in the glass frame sealant in the detection area through the image P', so as to judge whether the tightness of the glass is good.
And, the method further comprises:
1) Before formal detection, neutron radiation dose is set, and the dose is uniformly used in the detection process;
2) Neutron scattering calibration is carried out on a field standard sample, scattering data of the standard sample are obtained, uniformity of an image P 'is observed, and differences between the standard image P' and a standard value are compared, and if the image is uneven or a thermal neutron high-density region continuously distributed in the image exists, the existence of a residual moisture abnormal region in the glass frame sealant can be determined.
Example 3
1) The equipment shown in the embodiment 1 is used for detecting the connection quality of the bottom plate and the wall body shown in the figure 3 by adopting the method shown in the embodiment 2, and the connection quality is specifically as follows:
2) The glass as shown in FIG. 3 has a frame unit of 600mmX600mm in glass size and 8mm in glass thickness and a frame thickness of 50mm, and the glass insert frame is fixed with a silicone glass paste containing hydrogen atoms.
3) As an embodiment, the transverse frame outlined in fig. 3 is selected, and the detection area is continuously sprayed with water, so that the water permeates into the gap.
4) And (5) airing the detection area for half a day to ensure that the surface moisture of the detection area is thoroughly dried.
5) Using special automatic neutron scattering scanning imaging equipment, continuously and automatically scanning the region according to the equal grid step length to form a series of continuous thermal neutron scattering images p m,
6) The thermal neutron scattering image sequence P m is subjected to data processing by using the data processing technical scheme of the invention, so that an image P' shown in fig. 4 is formed. The image P' shows that the glass corner points of 2-6 cm and 65-70 cm have thermal neutron high-density areas which are residual moisture in the colloid and have leakage channels, and the situation of unsealing of the areas can be judged. The colloid at 104cm has a thermal neutron high-density region, which is residual water in the colloid.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The method for detecting the tightness of the glass curtain wall by utilizing the neutron scattering imaging system for detecting the tightness of the glass curtain wall is characterized in that the neutron scattering imaging system for detecting the tightness of the glass curtain wall comprises a neutron detector (1) with a detection window facing the glass curtain wall and vertical to the glass curtain wall, the neutron detector (1) is fixedly arranged on a driving platform of a vertical driving assembly (2) capable of driving the neutron detector to reciprocate in a direction vertical to the glass curtain wall, the vertical driving assembly (2) is fixedly arranged on the driving platform of a horizontal driving assembly (3) which is parallel to the glass curtain wall and can drive the glass curtain wall to horizontally reciprocate, the horizontal driving assembly (3) is arranged on a mounting frame (4), the mounting frame (4) is adsorbed on the glass curtain wall through a plurality of adjustable sucking discs (5), a driving host (6) is fixedly arranged on the mounting frame (4), the driving host (6) is connected with the neutron detector (1) through a 485 bus, and the driving host (6) is in signal connection with a remote control end (7);
the neutron detector (1) comprises a detector main board (8), and a neutron source module (9) and a thermal neutron detector module (10) which are respectively connected with the detector main board;
the driving host (6) comprises an embedded core board (11), a first lithium battery power supply (12), a motor driving module (13) and a first wireless receiving and transmitting module (14) which are respectively connected with the embedded core board (11), and the detector main board (8) is connected with the embedded core board (11) through a 485 bus;
the remote control end (7) comprises a control main board (15), a second lithium battery power supply (16), a second wireless transceiver module (17) and a display (18) which are respectively connected with the control main board;
The bottom of each U-shaped frame is respectively provided with an adjustable sucker (5);
Each U-shaped frame is movably connected with the horizontal driving assembly (3) through a connecting piece;
the adjustable sucking disc (5) is connected with an adjusting piece capable of adjusting the distance between the adjustable sucking disc and the bottom of the U-shaped frame;
The method comprises the following steps:
firstly, adsorbing a mounting frame (4) and components on the mounting frame on a glass curtain wall through an adjustable sucking disc (5), enabling a horizontal driving assembly (3) to be parallel to a detected sealing strip on the glass curtain wall, and enabling a detection window of a neutron detector (1) to be positioned right above the sealing strip;
Step 2, continuously sprinkling water for a period of time on the detection area, and airing;
Step 3, a remote control end (7) controls a vertical driving assembly (2) through a driving host (6) to drive a neutron detector (1) to move to a set vertical distance between the neutron detector and a glass curtain wall;
step 4, defining a detection area, determining a detection origin, a detection end point, a detection length H and a horizontal movement step length dH of the neutron detector (1);
Step 5, a remote control end (7) controls a horizontal driving assembly (3) through a driving host (6) to drive a neutron detector (1) to move to a detection origin, and then a probe of the neutron detector (1) performs primary neutron irradiation and thermal neutron scattering acquisition to obtain a thermal neutron single scattering imaging p 1 of a probe section of the neutron detector (1);
S6, a remote control end (7) controls a horizontal driving assembly (3) through a driving host (6) to drive a neutron detector (1) to move dH distance towards a detection end point, neutron irradiation and thermal neutron scattering acquisition are carried out once again, a single scattering imaging p 2 is obtained, dH=U/2, and U is the side length of a square cross section of a probe of the neutron detector (1);
S7, moving the dH distance forwards again, and repeatedly detecting neutrons until the detection length scanning is completed, so as to form a continuous thermal neutron scattering pattern sequence p m, m=1-M, and M=H/dH+1;
s8, constructing a new blank image P, wherein the size of the blank image P is (M+1) beta d (H/2) 2, dividing the blank image P into M+1 sub-blocks, and the sub-blocks are represented by P i, and i=1 to M+1;
S9, dividing each p m into two halves of sub-images equally, wherein the front half part is p i,f, and the rear half part is p i,b;
Obtaining a new image P
S10, performing two-dimensional filtering on the new image P to form a final image P ', and identifying residual moisture in the glass frame sealant in the detection area through the image P', so as to judge whether the tightness of the glass is good.
2. The method according to claim 1, wherein the method further comprises:
1) Before formal detection, neutron radiation dose is set, and the dose is uniformly used in the detection process;
2) Neutron scattering calibration is carried out on a field standard sample, scattering data of the standard sample are obtained, uniformity of an image P 'is observed, differences between the standard image P' and a standard value are compared, and if the image is uneven or a thermal neutron high-density region which is continuously distributed exists in the image, a residual moisture abnormal region exists in the glass frame sealant.
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| CN213336641U (en) * | 2020-11-25 | 2021-06-01 | 安徽省城建设计研究总院股份有限公司 | Neutron scattering imaging system for detecting sealing performance of glass curtain wall |
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| JP3113245U (en) * | 2005-06-02 | 2005-09-02 | 行政院原子能委員会核能研究所 | Backscattered neutron nondestructive detector |
| CN102109473B (en) * | 2009-12-29 | 2012-11-28 | 同方威视技术股份有限公司 | Method for imaging objects through photoneutron transmission and detector array |
| CN202256124U (en) * | 2011-08-29 | 2012-05-30 | 中国建筑科学研究院 | On-spot detection device of mechanical properties is glued to existing glass curtain wall structure |
| CN204214793U (en) * | 2014-11-04 | 2015-03-18 | 南京工大建设工程技术有限公司 | Concealed frame glass curtain wall presentation quality site inspection device |
| BE1024680B1 (en) * | 2016-10-21 | 2018-05-22 | Claeys Stephanie Catharina R. | Curtain wall and associated façade element and method for manufacturing such façade element. |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN213336641U (en) * | 2020-11-25 | 2021-06-01 | 安徽省城建设计研究总院股份有限公司 | Neutron scattering imaging system for detecting sealing performance of glass curtain wall |
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