CN108986942B - Linear array recognition system for marking characters on conical surface of end plug of fuel rod - Google Patents
Linear array recognition system for marking characters on conical surface of end plug of fuel rod Download PDFInfo
- Publication number
- CN108986942B CN108986942B CN201810960357.2A CN201810960357A CN108986942B CN 108986942 B CN108986942 B CN 108986942B CN 201810960357 A CN201810960357 A CN 201810960357A CN 108986942 B CN108986942 B CN 108986942B
- Authority
- CN
- China
- Prior art keywords
- fuel rod
- linear array
- frame
- end plug
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 275
- 230000007246 mechanism Effects 0.000 claims abstract description 82
- 230000005540 biological transmission Effects 0.000 claims abstract description 67
- 238000007599 discharging Methods 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 41
- 230000000007 visual effect Effects 0.000 claims abstract description 30
- 238000003384 imaging method Methods 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 47
- 210000000078 claw Anatomy 0.000 claims description 13
- 229920002635 polyurethane Polymers 0.000 claims description 10
- 239000004814 polyurethane Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000005286 illumination Methods 0.000 claims description 6
- 238000012634 optical imaging Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000005570 vertical transmission Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 26
- 230000008569 process Effects 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 5
- 238000013528 artificial neural network Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000011218 segmentation Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/06—Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Character Input (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a linear array recognition system for marking characters on a conical surface of a fuel rod end plug, which solves the problems of low efficiency and high labor intensity of recognition personnel in the prior art for recognizing the marking characters on the conical surface of the fuel rod end plug. The automatic feeding and discharging device comprises a frame, a feeding and discharging material storage rack, a PLC (programmable logic controller) controller, an automatic feeding and discharging mechanism, a longitudinal transmission mechanism, a visual system and a supporting mechanism, wherein the feeding and discharging material storage rack, the PLC controller, the automatic feeding and discharging mechanism, the visual system and the supporting mechanism are all arranged on the frame, the automatic feeding and discharging mechanism is used for moving a fuel rod to be identified from the feeding material storage rack to the longitudinal transmission mechanism or moving the identified fuel rod from the longitudinal transmission mechanism to the discharging material storage rack, the longitudinal transmission mechanism is used for conveying the fuel rod to or from the visual system, the visual system is used for optically imaging a conical surface marking character of a fuel rod end plug, and the supporting mechanism is used for supporting the fuel rod; the invention has simple structure, scientific and reasonable design, convenient use, high marking character recognition efficiency of the conical surface of the end plug of the fuel rod, high marking character recognition precision, stable system operation and high degree of automation, and can greatly reduce the labor intensity of recognition personnel.
Description
Technical Field
The invention relates to a linear array recognition system for marking characters on a conical surface of a fuel rod end plug.
Background
The marking characters on the end plug of the fuel rod are on the conical surface of the end plug, and the prior art generally adopts manual identification, so that the efficiency is low and the labor intensity of personnel is high.
Therefore, designing a marking character system for identifying the fuel rod end plug to improve the identification efficiency and reduce the labor intensity of personnel becomes a technical problem to be solved urgently by the technical personnel.
Disclosure of Invention
The invention aims to solve the technical problems that: the linear array recognition system for the marking characters on the conical surface of the fuel rod end plug solves the problems that in the prior art, the efficiency of recognizing the marking characters on the conical surface of the fuel rod end plug is low and the labor intensity of recognition personnel is high.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the linear array recognition system comprises a frame, a feeding stock frame, a discharging stock frame, an automatic feeding and discharging mechanism, a longitudinal transmission mechanism, a PLC (programmable logic controller) controller, a vision system and a supporting mechanism, wherein the feeding stock frame, the discharging stock frame, the automatic feeding and discharging mechanism, the longitudinal transmission mechanism, the PLC controller, the vision system and the supporting mechanism are all arranged on the frame, the vision system is used for carrying out optical imaging on the marking characters on the conical surface of the end plug of the fuel rod, and the supporting mechanism is used for supporting the fuel rod when the vision system carries out optical imaging on the fuel rod;
the feeding storage racks are four and are equidistantly distributed on one side of the top surface of the frame and used for temporarily storing fuel rods with characters to be identified, and the discharging storage racks are four and are equidistantly distributed on the other side of the top surface of the frame and used for temporarily storing fuel rods with identified characters;
The automatic feeding and discharging mechanism is arranged on the frame and comprises a driving cylinder fixed below the top surface of the frame, a pushing plate and a telescopic rod, wherein the driving cylinder is positioned above the top surface of the frame and used for transferring a fuel rod of a character to be recognized on the feeding and storing frame to the longitudinal transfer mechanism or transferring the fuel rod of the character recognized on the longitudinal transfer mechanism to the discharging and storing frame, and the telescopic rod is connected with the driving cylinder and the pushing plate;
The vertical transmission mechanism is longitudinally arranged on the frame and positioned between the feeding storage rack and the discharging storage rack and is used for transmitting the fuel rods to be identified, which are transmitted from the ejection plate, to the vision system or transmitting the fuel rods with the characters identified by the vision system to the ejection plate, and the vertical transmission mechanism comprises a transmission driving wheel set and five groups of transmission driven wheel sets, wherein the transmission driving wheel sets are equidistantly distributed on the same straight line and are used for clamping the fuel rods and driving the fuel rods to move, and the five groups of transmission driven wheel sets are used for supporting the fuel rods;
The visual system is positioned at one end of the frame and comprises a visual shell, a clamping and adjusting piece, a rotating motor, a white fuel rod linear array optical assembly and a black fuel rod linear array optical assembly, and a positioning assembly, wherein the clamping and adjusting piece is arranged at the inner side of the visual shell and used for clamping a fuel rod transmitted by the longitudinal transmission mechanism;
The white fuel rod linear array optical assembly comprises a white fuel rod linear array camera, a white fuel rod linear array camera optical fine adjustment piece, a white fuel rod linear array camera lens and a white fuel rod linear array light source, wherein the white fuel rod linear array camera is used for carrying out optical imaging on end plug conical surface marking characters on a white fuel rod fixed on the clamping adjusting piece, the white fuel rod linear array camera optical fine adjustment piece is connected to the bottom of the white fuel rod linear array camera, the white fuel rod linear array camera lens is connected to the white fuel rod linear array camera, and the white fuel rod linear array light source is positioned above the white fuel rod linear array camera and used for providing illumination for the white fuel rod linear array camera during imaging; the black fuel rod linear array optical assembly comprises a black fuel rod linear array camera, a black fuel rod linear array camera optical fine adjustment piece, a black fuel rod linear array camera lens and a black fuel rod linear array light source, wherein the black fuel rod linear array camera is used for carrying out optical imaging on a conical surface marking character of an end plug fixed on the clamping adjusting piece;
the PLC is respectively connected with the driving cylinder, the supporting mechanism, the transmission driving wheel set, the rotating motor, the white fuel rod linear array camera optical fine tuning piece, the white fuel rod linear array light source, the black fuel rod linear array camera optical fine tuning piece and the black fuel rod linear array light source in a functional mode.
Further, the conveying driving wheel set comprises a guide rail longitudinally arranged on the frame, a pair of guide rods fixed on the guide rail and parallel to each other, and a pair of driving conveying bases slidably arranged on the guide rail and respectively penetrating through the pair of guide rods, each driving conveying base is respectively provided with a parallel air claw, a conveying driving wheel fixed on the parallel air claw and a driving motor for driving the conveying driving wheel to operate, the PLC is respectively in functional connection with the parallel air claw and the driving motor, the two conveying driving wheels clamp a fuel rod under the action of the parallel air claw, and simultaneously the driving motor operates to convey or separate the fuel rod from the visual housing.
Further, a tightening spring is arranged on the guide rod in a penetrating mode, the active transmission base is tightly pressed towards the visual shell by the tightening spring when being arranged on the guide rod in a penetrating mode, and the PLC is in functional connection with the tightening spring.
Further, the transmission driven wheel group comprises a driven transmission base fixed on the frame and a transmission driven wheel connected with the driven transmission base through a supporting rod.
Further, the distance between the transmission driving wheel set and the transmission driven wheel set and the distance between the adjacent driving wheel sets are all 250mm.
Further, the supporting mechanism comprises five groups of supporting wheel groups, the five groups of supporting wheel groups are equidistantly distributed on the same straight line as the five groups of conveying driven wheel groups, the distance between every two adjacent supporting wheel groups is 300mm, each supporting wheel group comprises a supporting seat fixed on the frame, a telescopic bracket connected to the supporting seat, a pair of polyurethane supporting wheels fixed on the telescopic bracket and used for supporting a fuel rod, and a lifting cylinder arranged on the supporting seat and connected with the telescopic bracket, the lifting cylinder is functionally connected with the PLC, and the lifting cylinder is used for driving the telescopic bracket to ascend or descend.
Further, the positioning assembly comprises a positioning rod used for positioning the marking characters of the conical surface of the end plug of the fuel rod in the visual field of the linear array optical assembly, and an adjusting nut which is positioned outside the visual shell and penetrates through the positioning rod, and the positioning rod is coaxial with the fuel rod fixed on the clamping adjusting piece.
Further, all the feeding material storage frames form an included angle smaller than 3 degrees with the horizontal plane, the feeding material storage frames are located at one end of the frame and lower than the other end of the frame, and more than two baffle plates are arranged on each feeding material storage frame at equal intervals.
Further, all the blanking material storage frames form an included angle smaller than 3 degrees with the horizontal plane, and the blanking material storage frames are located at one end of the frame and higher than the other end of the frame.
Further, each blanking stock frame is provided with a material blocking column at one end far away from the frame.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention has simple structure, scientific and reasonable design, convenient use, high marking character recognition efficiency of the conical surface of the end plug of the fuel rod, high marking character recognition precision, stable system operation and high degree of automation, and can greatly reduce the labor intensity of recognition personnel.
(2) According to the invention, the frame, the feeding and storing frame, the discharging and storing frame, the automatic feeding and discharging mechanism, the longitudinal transmission mechanism, the PLC, the vision system and the supporting mechanism are arranged, so that the marking character recognition efficiency of the conical surface of the end plug of the fuel rod is high, the marking character recognition precision is high, the system operation is stable, the automation degree is high, and the labor intensity of recognition personnel can be greatly reduced. The method comprises the steps that a fuel rod to be identified is fed to a feeding storage rack, an automatic feeding and discharging mechanism moves the fuel rod to be identified from the feeding storage rack to a longitudinal transmission mechanism, a driving motor is started to convey the fuel rod to be identified to a vision system, after the fuel rod to be identified is in place, the driving motor stops running, a clamping adjusting piece in the vision system clamps the fuel rod to be identified, a lifting cylinder in a supporting mechanism runs, a polyurethane supporting wheel ascends to support the fuel rod to be identified, a rotating motor in the vision system drives the fuel rod to rotate, the vision system starts to identify marking characters on a conical surface of an end plug of the fuel rod to be identified, after the marking of characters is completed, the driving motor is started to withdraw the identified fuel rod from the vision system, and the automatic feeding and discharging mechanism turns over the identified fuel rod to the discharging storage rack, and the identified fuel rod is temporarily stored in the discharging storage rack.
In the process, the automatic feeding and discharging mechanism is responsible for moving the fuel rods to be identified on the feeding and storing frame to the longitudinal transmission mechanism, and moving the identified fuel rods on the longitudinal transmission mechanism to the discharging and storing frame; the ejector plate in the automatic feeding and discharging mechanism is driven by the driving cylinder to move up and down, and is at the lower position in the initial stage, when feeding and discharging are needed, the driving cylinder is started to move the ejector plate up to the upper position, the station fuel rod flows into the lower station (namely flows into the longitudinal transmission mechanism), and the upper station fuel rod flows into the station. The feeding material storage rack and the discharging material storage rack are inclined by less than 3 degrees, the angle is adjustable, and the fuel rod is stopped at a material blocking plate of the feeding material storage rack or a material blocking column of the discharging material storage rack.
In the process, after the automatic feeding and discharging mechanism moves the fuel rod from the feeding and storing frame to the longitudinal transmission mechanism, the fuel rod is supported by the conveying driving wheel and the conveying driven wheel at the moment, the conveying driven wheel is an unpowered wheel, the fuel rod is driven to the vision system by the conveying driving wheel, the vision system clamps the fuel rod, the two conveying driving wheels are opened and leave the fuel rod, the polyurethane supporting wheel ascends to support the fuel rod at the moment, the fuel rod leaves the longitudinal transmission mechanism, the vision system starts to identify the fuel rod, and after the identification is completed, the fuel rod is clamped and sent out by the two conveying driving wheels.
In the process, the conveying driving wheel is arranged on the guide rail, the jacking spring jacks the active conveying base towards the vision system, after feeding is in place, the fuel rod is in limiting contact with the positioning rod in the vision system, the fuel rod can not be conveyed forwards any more, the conveying driving wheel starts to compress the jacking spring through the active conveying base, after the system checks the compression of the jacking spring, the feeding is stopped, a displacement sensor can be arranged between the PLC controller and the jacking spring, the displacement sensor detects the displacement change of the jacking spring in real time and conveys detected information to the PLC controller in real time, and when the PLC controller receives the displacement change of the jacking spring, the conveying driving wheel set is controlled in real time to stop feeding.
In the process, the fuel rod is of a slender structure, the wall is thin and easy to deform, five groups of conveying driven wheel groups are arranged, and the distances between the conveying driving wheel groups and the conveying driven wheel groups and between the adjacent driving wheel groups are 250mm; simultaneously, five groups of supporting wheel groups are also arranged, the distance between every two adjacent supporting wheel groups is 300mm, and the supporting wheel groups mainly support the fuel rods through a pair of polyurethane supporting wheels. The fuel rod can be effectively supported, and the fuel rod is prevented from falling down between the two feeding wheels due to gravity.
In the process, after the fuel rod is transmitted to a vision system, marking characters on the conical surface of the end plug of the fuel rod are positioned by a positioning rod to optically image in the visual field of the linear array optical assembly, the white fuel rod linear array optical assembly and the black fuel rod linear array optical assembly are respectively arranged at two sides of the marking characters on the conical surface of the end plug of the fuel rod, the rotating motor drives the fuel rod to rotate at a uniform speed for one circle, the white fuel rod linear array optical assembly and the black fuel rod linear array optical assembly scan and image the appearance of a product, and finally splice the products, so that the unfolding graph of the conical surface of the marking characters on the conical surface of the end plug of the fuel rod can be obtained, an adjusting nut is arranged at the outer side of a vision shell, and the fuel rod is adjusted, so that the invention can be suitable for identifying the marking characters on the conical surfaces of the end plugs of the fuel rods with different specifications.
In the process, the PLC controller is respectively in functional connection with the driving cylinder, the supporting mechanism, the transmission driving wheel set, the linear array optical assembly and the annular light source part, the PLC controller controls the system to operate, the system is stable in operation, the degree of automation is high, and the labor intensity of identification personnel can be greatly reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic view of a frame of the present invention.
FIG. 3 is a schematic view of the longitudinal transmission mechanism and the supporting mechanism of the present invention.
Fig. 4 is a right side view of fig. 3.
Fig. 5 is a top view of fig. 3.
FIG. 6 is a schematic view of the blanking stock rack of the present invention.
FIG. 7 is a schematic view of a loading storage rack according to the present invention.
Fig. 8 is a schematic diagram of an automatic feeding and discharging mechanism of the present invention.
Fig. 9 is an external schematic view of the vision system of the present invention.
Fig. 10 is a schematic diagram of the interior of the vision system of the present invention.
Fig. 11 is an internal schematic front view of the vision system of the present invention.
FIG. 12 is a schematic diagram of character segmentation in accordance with the present invention.
Fig. 13 is a representation of the upper, middle or lower sparse representation of the present invention.
Wherein, the names corresponding to the reference numerals are:
1-rack, 2-feeding stock rack, 3-blanking stock rack, 4-driving cylinder, 5-top material plate, 6-telescopic rod, 7-guide rail, 8-driving transmission base, 9-parallel air claw, 10-transmission driving wheel, 11-driving motor, 12-driven transmission base, 13-transmission driven wheel, 14-guide rod, 15-top spring, 16-lifting cylinder, 17-clamping adjusting piece, 18-positioning rod, 19-adjusting nut, 20-rotating motor, 21-white fuel bar array optical component, 22-black fuel bar array optical component, 23-white fuel bar array camera, 24-visual shell, 25-baffle plate, 26-baffle column, 28-supporting seat, 29-telescopic bracket, 30-polyurethane supporting wheel, 31-white fuel bar array camera optical trimming piece, 32-white fuel bar array camera lens, 33-white fuel bar array light source, 34-black fuel bar array camera, 35-black fuel bar array camera optical component, 36-white fuel bar array camera lens, 37-black fuel bar array light source.
Detailed Description
The invention will be further illustrated by the following description and examples, which include but are not limited to the following examples.
As shown in fig. 1-13, the linear array recognition system for marking characters on the conical surface of the fuel rod end plug has the advantages of simple structure, scientific and reasonable design, convenience in use, high recognition efficiency of the marking characters on the conical surface of the fuel rod end plug, high recognition precision of the marking characters, stable system operation and high degree of automation, and can greatly reduce the labor intensity of recognition personnel. The invention comprises a frame 1, a feeding stock frame 2, a discharging stock frame 3, an automatic feeding and discharging mechanism, a longitudinal transmission mechanism, a PLC (programmable logic controller) arranged on the frame 1, a vision system for optically imaging a marking character on a conical surface of a fuel rod end plug, and a supporting mechanism for supporting the fuel rod when the vision system optically images the fuel rod, wherein the feeding stock frame 2, the discharging stock frame 3, the automatic feeding and discharging mechanism, the longitudinal transmission mechanism and the PLC are all arranged on the frame 1.
The four feeding storage racks 2 are equidistantly distributed on one side of the top surface of the frame 1 and used for temporarily storing fuel rods with characters to be identified, and the four discharging storage racks 3 are equidistantly distributed on the other side of the top surface of the frame 1 and used for temporarily storing fuel rods with identified characters.
The automatic feeding and discharging mechanism is arranged on the frame 1 and comprises a driving cylinder 4 fixed below the top surface of the frame 1, a pushing plate 5 positioned above the top surface of the frame 1 and used for transferring fuel rods with characters to be recognized on the feeding and storing frame 2 to the longitudinal transmission mechanism or transferring the fuel rods with recognized characters on the longitudinal transmission mechanism to the discharging and storing frame 3, and a telescopic rod 6 connecting the driving cylinder 4 and the pushing plate 5.
The longitudinal transmission mechanism is longitudinally arranged on the frame 1 and is positioned between the feeding material storage rack 2 and the discharging material storage rack 3, and is used for transmitting the fuel rods with characters to be recognized, which are transmitted from the material ejection plate 5, to the vision system or transmitting the fuel rods with characters recognized by the vision system to the material ejection plate 5, and comprises a transmission driving wheel set and five transmission driven wheel sets, wherein the transmission driving wheel sets are equidistantly distributed on the same straight line and are used for clamping the fuel rods and driving the fuel rods to move, and the five transmission driven wheel sets are used for supporting the fuel rods.
The vision system is positioned at one end of the frame 1 and comprises a vision housing 24, a clamping and adjusting piece 17 which is arranged at the inner side of the vision housing 24 and used for clamping a fuel rod transmitted by the longitudinal transmission mechanism, a rotating motor 20, a white fuel rod linear array optical component 21 and a black fuel rod linear array optical component 22 which are all arranged in the vision housing 24, and a positioning component which is arranged at the outer side of the vision housing 24 and used for positioning marking characters of a conical surface of a fuel rod end plug in the visual field of the linear array optical component 21, wherein the rotating motor 20 is connected with the inner end of the clamping and adjusting piece 17 and used for driving the fuel rod to rotate at a uniform speed.
The white fuel rod linear array optical assembly 21 comprises a white fuel rod linear array camera 23, a white fuel rod linear array camera optical fine adjustment piece 31, a white fuel rod linear array camera lens 32 and a white fuel rod linear array light source 33, wherein the white fuel rod linear array camera 23 is used for optically imaging a conical surface marking character of an end plug on a white fuel rod fixed on the clamping adjusting piece 17, the white fuel rod linear array camera optical fine adjustment piece 31 is connected to the bottom of the white fuel rod linear array camera 23, the white fuel rod linear array camera lens 32 is connected to the white fuel rod linear array camera 23, and the white fuel rod linear array light source 33 is positioned above the white fuel rod linear array camera 23 and used for providing illumination for the white fuel rod linear array camera 23 during imaging; the black fuel rod linear array optical assembly 22 comprises a black fuel rod linear array camera 34 for optically imaging a black fuel rod conical surface marking character fixed on the black fuel rod on the clamping adjusting piece 17, a black fuel rod linear array camera optical fine adjusting piece 35 connected to the bottom of the black fuel rod linear array camera 34, a black fuel rod linear array camera lens 36 connected to the black fuel rod linear array camera 34, and a black fuel rod linear light source 37 positioned above the black fuel rod linear array camera 34 and used for providing illumination for the black fuel rod linear array camera 34 during imaging.
The PLC is respectively and functionally connected with the driving cylinder 4, the supporting mechanism, the transmission driving wheel set, the rotating motor 20, the white fuel rod linear array camera 23, the white fuel rod linear array camera optical fine adjustment piece 31, the white fuel rod linear array light source 33, the black fuel rod linear array camera 34, the black fuel rod linear array camera optical fine adjustment piece 35 and the black fuel rod linear array light source 37.
The invention relates to a transmission driving wheel set, which comprises a guide rail 7 longitudinally arranged on a frame 1, a pair of guide rods 14 fixed on the guide rail 7 and parallel to each other, and a pair of driving transmission bases 8 slidably arranged on the guide rail 7 and respectively penetrating through the pair of guide rods 14, wherein each driving transmission base 8 is respectively provided with a parallel air claw 9, a transmission driving wheel 10 fixed on the parallel air claw 9 and a driving motor 11 for driving the transmission driving wheel 10 to operate, the PLC is respectively and functionally connected with the parallel air claw 9 and the driving motor 11, and the two transmission driving wheels 10 clamp a fuel rod under the action of the parallel air claws 9 and simultaneously operate to send or separate the fuel rod from a visual shell 24 under the action of the driving motor 11.
According to the invention, the pushing spring 15 is arranged on the guide rod 14 in a penetrating manner, when the active transmission base 8 is arranged on the guide rod 14 in a penetrating manner, the pushing spring 15 pushes the visual shell 24 to tightly, and the PLC is in functional connection with the pushing spring 15.
The conveying driven wheel group comprises a driven conveying base 12 fixed on the frame 1 and a conveying driven wheel 13 connected with the driven conveying base 12 through a supporting rod.
The distance between the transmission driving wheel set and the transmission driven wheel set and the distance between the adjacent driving wheel sets are all 250mm.
The supporting mechanism comprises five groups of supporting wheel groups, wherein the five groups of supporting wheel groups are equidistantly distributed on the same straight line as the five groups of conveying driven wheel groups, the distance between every two adjacent supporting wheel groups is 300mm, each supporting wheel group comprises a supporting seat 28 fixed on the frame 1, a telescopic support 29 connected to the supporting seat 28, a pair of polyurethane supporting wheels 30 fixed on the telescopic support 29 and used for supporting a fuel rod, and a lifting cylinder 16 which is arranged on the supporting seat 28 and is connected with the telescopic support 29 in a piston rod mode, the lifting cylinder 16 is connected with the PLC in a functional mode, and the lifting cylinder 16 is used for driving the telescopic support 29 to ascend or descend.
The positioning assembly comprises a positioning rod 18 for positioning the marking characters of the conical surface of the end plug of the fuel rod in the visual field of the linear array optical assembly, and an adjusting nut 19 which is positioned outside the visual housing 24 and penetrates through the positioning rod, wherein the positioning rod 18 is coaxial with the fuel rod fixed on the clamping adjusting piece 17.
According to the invention, all the feeding material storage frames 2 form an included angle smaller than 3 degrees with the horizontal plane, the feeding material storage frames 2 are positioned at one end of the frame 1 and lower than the other end, and more than two baffle plates 25 are arranged on each feeding material storage frame 2 at equal intervals.
According to the invention, all the blanking material storage frames 3 form an included angle smaller than 3 degrees with the horizontal plane, and the blanking material storage frames 3 are positioned at one end of the frame 1 and higher than the other end.
Each of the blanking storage racks 3 of the present invention is provided with a material blocking column 26 at an end remote from the frame 1.
According to the invention, the frame, the feeding and storing frame, the discharging and storing frame, the automatic feeding and discharging mechanism, the longitudinal transmission mechanism, the PLC, the vision system and the supporting mechanism are arranged, so that the marking character recognition efficiency of the conical surface of the end plug of the fuel rod is high, the marking character recognition precision is high, the system operation is stable, the automation degree is high, and the labor intensity of recognition personnel can be greatly reduced. The method comprises the steps that a fuel rod to be identified is fed to a feeding storage rack, an automatic feeding and discharging mechanism moves the fuel rod to be identified from the feeding storage rack to a longitudinal transmission mechanism, a driving motor is started to convey the fuel rod to be identified to a vision system, after the fuel rod to be identified is in place, the driving motor stops running, a clamping adjusting piece in the vision system clamps the fuel rod to be identified, a lifting cylinder in a supporting mechanism runs, a polyurethane supporting wheel ascends to support the fuel rod to be identified, a rotating motor in the vision system drives the fuel rod to rotate, the vision system starts to identify marking characters on a conical surface of an end plug of the fuel rod to be identified, after the marking of characters is completed, the driving motor is started to withdraw the identified fuel rod from the vision system, and the automatic feeding and discharging mechanism turns over the identified fuel rod to the discharging storage rack, and the identified fuel rod is temporarily stored in the discharging storage rack.
In the process, the automatic feeding and discharging mechanism is responsible for moving the fuel rods to be identified on the feeding and storing frame to the longitudinal transmission mechanism, and moving the identified fuel rods on the longitudinal transmission mechanism to the discharging and storing frame; the ejector plate in the automatic feeding and discharging mechanism is driven by the driving cylinder to move up and down, and is at the lower position in the initial stage, when feeding and discharging are needed, the driving cylinder is started to move the ejector plate up to the upper position, the station fuel rod flows into the lower station (namely flows into the longitudinal transmission mechanism), and the upper station fuel rod flows into the station. The feeding material storage rack and the discharging material storage rack are inclined by less than 3 degrees, the angle is adjustable, and the fuel rod is stopped at a material blocking plate of the feeding material storage rack or a material blocking column of the discharging material storage rack.
In the process, after the automatic feeding and discharging mechanism moves the fuel rod from the feeding and storing frame to the longitudinal transmission mechanism, the fuel rod is supported by the conveying driving wheel and the conveying driven wheel at the moment, the conveying driven wheel is an unpowered wheel, the fuel rod is driven to the vision system by the conveying driving wheel, the vision system clamps the fuel rod, the two conveying driving wheels are opened and leave the fuel rod, the polyurethane supporting wheel ascends to support the fuel rod at the moment, the fuel rod leaves the longitudinal transmission mechanism, the vision system starts to identify the fuel rod, and after the identification is completed, the fuel rod is clamped and sent out by the two conveying driving wheels.
In the process, the conveying driving wheel is arranged on the guide rail, the jacking spring jacks the active conveying base towards the vision system, after feeding is in place, the fuel rod is in limiting contact with the positioning rod in the vision system, the fuel rod can not be conveyed forwards any more, the conveying driving wheel starts to compress the jacking spring through the active conveying base, after the system checks the compression of the jacking spring, the feeding is stopped, a displacement sensor can be arranged between the PLC controller and the jacking spring, the displacement sensor detects the displacement change of the jacking spring in real time and conveys detected information to the PLC controller in real time, and when the PLC controller receives the displacement change of the jacking spring, the conveying driving wheel set is controlled in real time to stop feeding.
In the process, the fuel rod is of a slender structure, the wall is thin and easy to deform, five groups of conveying driven wheel groups are arranged, and the distances between the conveying driving wheel groups and the conveying driven wheel groups and between the adjacent driving wheel groups are 250mm; simultaneously, five groups of supporting wheel groups are also arranged, the distance between every two adjacent supporting wheel groups is 300mm, and the supporting wheel groups mainly support the fuel rods through a pair of polyurethane supporting wheels. The fuel rod can be effectively supported, and the fuel rod is prevented from falling down between the two feeding wheels due to gravity.
In the process, after the fuel rod is transmitted to a vision system, marking characters on the conical surface of the end plug of the fuel rod are positioned by a positioning rod to optically image in the visual field of the linear array optical assembly, the white fuel rod linear array optical assembly and the black fuel rod linear array optical assembly are respectively arranged at two sides of the marking characters on the conical surface of the end plug of the fuel rod, the rotating motor drives the fuel rod to rotate at a uniform speed for one circle, the white fuel rod linear array optical assembly and the black fuel rod linear array optical assembly scan and image the appearance of a product, and finally splice the products, so that the unfolding graph of the conical surface of the marking characters on the conical surface of the end plug of the fuel rod can be obtained, an adjusting nut is arranged at the outer side of a vision shell, and the fuel rod is adjusted, so that the invention can be suitable for identifying the marking characters on the conical surfaces of the end plugs of the fuel rods with different specifications.
In the process, the PLC controller is respectively in functional connection with the driving cylinder, the supporting mechanism, the transmission driving wheel set, the linear array optical assembly and the annular light source part, the PLC controller controls the system to operate, the system is stable in operation, the degree of automation is high, and the labor intensity of identification personnel can be greatly reduced.
The invention is used for marking and identifying characters on the conical surface of the end plug of the fuel rod, the characters are engraved by laser, the characters consist of capital letters A-Z and Arabic numerals 0-9, the characters start with capital English letters, and character images are acquired by a camera through an optical imaging system. Because the fuel rod body is very small, the surface is smooth, black or white, the cone-shaped surface of the end plug is uneven, the character fonts are small, and the strokes are thinner, so that the brightness of the character images is lower, the contrast is poorer, and noise generated by uneven illumination exists. The current character recognition technology does not have a universal character recognition system suitable for various application scenes, so the invention researches a practical character recognition algorithm for the conical surface marking of the fuel rod end plug according to the specific application environment of the conical surface marking character recognition of the fuel rod end plug.
The method for identifying the marking characters of the conical surface of the end plug of the fuel rod comprises the following steps:
a. analyzing imaging characteristics and character characteristics of marking characters on a conical surface of a fuel rod end plug, providing a novel image enhancement method based on gray value statistics characteristics, solving the problem of character image reflection, and thickening thinner characters;
b. Dividing characters by using image binarization, and extracting character areas from complex image backgrounds;
c. the character feature extraction method based on membership is provided, and character features are extracted;
d. A pattern classification method based on Radial Basis Function (RBF) neural network is employed as a character recognition method.
In the step a, the imaging characteristics and character characteristics of the marking characters on the conical surface of the end plug of the fuel rod are analyzed, a novel image enhancement method based on gray value statistics characteristics is provided, and compared with the traditional image enhancement method, the method can obtain a more stable image gray value range while enhancing the image contrast, so that the problem of character image reflection can be better solved, and fine characters are thickened so as to facilitate character segmentation;
Firstly, calculating the global gray value statistical characteristics of an image, and calculating a gray average value M and a variance VAR of an image I with the size of N by using a formula (1) and a formula (2); then substituting M and VAR into a formula (3) to obtain a gray value normalized image I 1, wherein M 0 and VAR 0 are respectively an appointed image mean value and an appointed image variance, and the gray value normalization method can obtain a stable image gray value range while enhancing the contrast of a character image, so that the problem of reflection of the character image is effectively solved; finally, calculating the statistical characteristics of the local gray values of the image, and obtaining an image I 2 with thickened characters by using a formula (4), so as to facilitate character segmentation, wherein max (I, j) and min (I, j) respectively represent the maximum value and the minimum value of the local gray values at the pixel points (I, j).
I2(i,j)＝|max(i,j)-min(i,j)| (4)
In step b, the characters are segmented by image binarization, and character areas are extracted from complex image backgrounds. And (3) bringing I 2 (I, j) obtained in the formula (4) into the formula (5) to obtain a binarized image g (I, j), wherein T represents a global threshold constant.
In step c, aiming at the defects of the traditional character feature extraction method based on geometric features or structural features, the traditional character feature extraction method is difficult to distinguish similar characters and poor in noise resistance, and the traditional character feature extraction method based on membership degree is generally difficult to meet real-time requirements due to large operand. The method starts from geometric features, considers that various noise pollution exists in the image, and adds membership analysis, so that the problem of description ambiguity is more reasonable than the geometric features. Compared with the traditional character feature extraction algorithm, the method has the advantages that: the method comprises the following steps of (1) high characteristic space distinction degree and higher recognition rate; (2) Features are easy to extract, feature space dimension is low, space-time complexity is lower, and algorithm speed is faster; (3) Better stability and robustness, and is not easy to be interfered by noise.
Firstly, extracting geometric features of a character, as shown in fig. 12 (a), equally dividing the character into 3 parts in the horizontal direction, and counting the number of black pixels in the row where 2 dividing lines are located as a feature value; vertical direction is the same as in fig. 12 (b); as shown in fig. 12 (c), the character is divided into 4*2 small blocks in the horizontal and vertical directions, and the number of black pixels in each small block is counted as a feature value, thereby obtaining a 13-dimensional geometric feature vector. Then, membership degree analysis is added, and considering that black pixels of capital English letters and Arabic numerals are generally sparse in spatial distribution, the characters are divided into upper, middle and lower 3 parts in the horizontal direction, the probability of black pixels in the middle area (shown as rectangular blocks in fig. 13) of each part is calculated, and 3-dimensional characteristic values are obtained, so that the description ambiguity problem is more reasonable than the geometric characteristics, and the characteristics are not easily interfered by noise.
In step d, a pattern classification method based on an RBF neural network is adopted as a character recognition method, wherein the RBF neural network comprises an input layer, a hidden layer and an output layer. C, taking the 16-dimensional feature vector obtained in the step c as an input layer; obtaining a hidden layer through self-adaptive learning; the 26 capital English letters plus 10 Arabic numerals, an output layer with 36 nodes is obtained. The neural network has the advantages of simple network structure, high training speed and high recognition rate.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or color changes made in the main design concept and spirit of the present invention are still consistent with the present invention, and all the technical problems to be solved are included in the scope of the present invention.
Claims (10)
1. A linear array recognition system for marking characters on a conical surface of a fuel rod end plug is characterized in that: the automatic feeding and discharging device comprises a frame (1), a feeding and storing frame (2), a discharging and storing frame (3), an automatic feeding and discharging mechanism, a longitudinal transmission mechanism, a PLC (programmable logic controller) arranged on the frame (1), a visual system for optically imaging a conical surface marking character of a fuel rod end plug, and a supporting mechanism for supporting the fuel rod when the visual system optically images the fuel rod, wherein the feeding and storing frame (2), the discharging and storing frame (3) are arranged on the frame (1);
The feeding storage racks (2) are four and are equidistantly distributed on one side of the top surface of the frame (1) and used for temporarily storing fuel rods with characters to be identified, and the discharging storage racks (3) are four and are equidistantly distributed on the other side of the top surface of the frame (1) and used for temporarily storing fuel rods with identified characters;
The automatic feeding and discharging mechanism is arranged on the frame (1) and comprises a driving cylinder (4) fixed below the top surface of the frame (1), a material pushing plate (5) which is positioned above the top surface of the frame (1) and used for conveying a fuel rod with characters to be identified on the feeding and storing frame (2) to the longitudinal conveying mechanism, conveying the fuel rod with the characters identified on the longitudinal conveying mechanism to the discharging and storing frame (3), and a telescopic rod (6) which is connected with the driving cylinder (4) and the material pushing plate (5);
The vertical transmission mechanism is longitudinally arranged on the frame (1) and is positioned between the feeding storage rack (2) and the discharging storage rack (3) and is used for transmitting the fuel rods with characters to be recognized, which are transmitted from the ejection plate (5), to the vision system or transmitting the fuel rods with characters recognized by the vision system to the ejection plate (5), and comprises a transmission driving wheel set and five groups of transmission driven wheel sets, wherein the transmission driving wheel sets are equidistantly distributed on the same straight line and are used for clamping the fuel rods and driving the fuel rods to move, and the five groups of transmission driven wheel sets are used for supporting the fuel rods;
The visual system is positioned at one end of the frame (1), and comprises a visual shell (24), a clamping adjusting piece (17) which is arranged at the inner side of the visual shell (24) and used for clamping a fuel rod transmitted by the longitudinal transmission mechanism, a rotating motor (20), a white fuel rod linear array optical assembly (21) and a black fuel rod linear array optical assembly (22) which are all arranged in the visual shell (24), and a positioning assembly which is arranged at the outer side of the visual shell (24) and used for positioning a marking character of a conical surface of an end plug of the fuel rod in the visual field of the linear array optical assembly (21), wherein the rotating motor (20) is connected with the inner end of the clamping adjusting piece (17) and used for driving the fuel rod to rotate at a uniform speed;
The white fuel rod linear array optical assembly (21) comprises a white fuel rod linear array camera (23) for optically imaging end plug conical surface marking characters on a white fuel rod fixed on the clamping adjusting piece (17), a white fuel rod linear array camera optical fine adjusting piece (31) connected to the bottom of the white fuel rod linear array camera (23), a white fuel rod linear array camera lens (32) connected to the white fuel rod linear array camera (23) and a white fuel rod linear array light source (33) positioned above the white fuel rod linear array camera (23) for providing illumination for the white fuel rod linear array camera (23) during imaging; the black fuel rod linear array optical assembly (22) comprises a black fuel rod linear array camera (34) for carrying out optical imaging on end plug conical surface marking characters fixed on the clamping adjusting piece (17), a black fuel rod linear array camera optical fine adjusting piece (35) connected to the bottom of the black fuel rod linear array camera (34), a black fuel rod linear array camera lens (36) connected to the black fuel rod linear array camera (34), and a black fuel rod linear array light source (37) positioned above the black fuel rod linear array camera (34) for providing illumination for the black fuel rod linear array camera (34) during imaging;
The PLC is respectively and functionally connected with the driving cylinder (4), the supporting mechanism, the transmission driving wheel set, the rotating motor (20), the white fuel rod linear array camera (23), the white fuel rod linear array camera optical fine adjustment piece (31), the white fuel rod linear array light source (33), the black fuel rod linear array camera (34), the black fuel rod linear array camera optical fine adjustment piece (35) and the black fuel rod linear array light source (37).
2. A fuel rod end plug cone marking character linear array identification system according to claim 1, wherein: the conveying driving wheel set comprises a guide rail (7) longitudinally arranged on the frame (1), a pair of guide rods (14) fixed on the guide rail (7) and parallel to each other, and a pair of driving conveying bases (8) slidably arranged on the guide rail (7) and respectively penetrating through the pair of guide rods (14), wherein each driving conveying base (8) is respectively provided with a parallel air claw (9), a conveying driving wheel (10) fixed on the parallel air claw (9) and a driving motor (11) for driving the conveying driving wheel (10) to operate, the PLC is respectively in functional connection with the parallel air claws (9) and the driving motor (11), and the two conveying driving wheels (10) clamp a fuel rod under the action of the parallel air claws (9) and simultaneously operate under the action of the driving motor (11) to convey the fuel rod to or leave the visual shell (24).
3. A fuel rod end plug cone marking character linear array identification system according to claim 2, wherein: the pushing spring (15) is arranged on the guide rod (14) in a penetrating mode, the pushing spring (15) pushes the guide rod (14) to tightly push the visual shell (24) when the active conveying base (8) is arranged on the guide rod in a penetrating mode, and the PLC is in functional connection with the pushing spring (15).
4. A fuel rod end plug cone marking character linear array identification system according to claim 3, wherein: the conveying driven wheel group comprises a driven conveying base (12) fixed on the frame (1), and a conveying driven wheel (13) connected with the driven conveying base (12) through a supporting rod.
5. A fuel rod end plug cone marking character linear array identification system according to claim 4, wherein: the distance between the transmission driving wheel set and the transmission driven wheel set and the distance between the adjacent driving wheel sets are all 250mm.
6. A fuel rod end plug cone marking character linear array identification system according to claim 5, wherein: the supporting mechanism comprises five groups of supporting wheel groups, the five groups of supporting wheel groups are equidistantly distributed on the same straight line as the five groups of conveying driven wheel groups, the distance between every two adjacent supporting wheel groups is 300mm, each supporting wheel group comprises a supporting seat (28) fixed on the frame (1), a telescopic support (29) connected to the supporting seat (28), a pair of polyurethane supporting wheels (30) fixed on the telescopic support (29) and used for supporting a fuel rod, and a lifting cylinder (16) arranged on the supporting seat (28) and connected with the telescopic support (29) through a piston rod, the lifting cylinder (16) is functionally connected with the PLC, and the lifting cylinder (16) is used for driving the telescopic support (29) to ascend or descend.
7. A fuel rod end plug cone marking character linear array identification system according to claim 6, wherein: the positioning assembly comprises a positioning rod (18) used for positioning the marking characters of the conical surface of the end plug of the fuel rod in the visual field of the linear array optical assembly, and an adjusting nut (19) which is positioned outside the visual shell (24) and penetrates through the positioning rod, and the positioning rod (18) is coaxial with the fuel rod fixed on the clamping adjusting piece (17).
8. A fuel rod end plug cone marking character linear array identification system according to claim 7, wherein: all material loading stock frame (2) all personally submits an contained angle of less than 3 with the level, and material loading stock frame (2) are located one end of frame (1) is less than the other end, every material loading stock frame (2) is gone up the equal distance and is equipped with more than two striker plates (25).
9. A fuel rod end plug cone marking character linear array identification system according to claim 8, wherein: all the blanking material storage frames (3) form an included angle smaller than 3 degrees with the horizontal plane, and the blanking material storage frames (3) are located at one end of the frame (1) and higher than the other end of the frame.
10. A fuel rod end plug cone marking character linear array identification system according to claim 9, wherein: each blanking storage rack (3) is provided with a material blocking column (26) at one end far away from the rack (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960357.2A CN108986942B (en) | 2018-08-22 | 2018-08-22 | Linear array recognition system for marking characters on conical surface of end plug of fuel rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960357.2A CN108986942B (en) | 2018-08-22 | 2018-08-22 | Linear array recognition system for marking characters on conical surface of end plug of fuel rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108986942A CN108986942A (en) | 2018-12-11 |
| CN108986942B true CN108986942B (en) | 2024-04-23 |
Family
ID=64547215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810960357.2A Active CN108986942B (en) | 2018-08-22 | 2018-08-22 | Linear array recognition system for marking characters on conical surface of end plug of fuel rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108986942B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109961860A (en) * | 2019-03-28 | 2019-07-02 | 中核建中核燃料元件有限公司 | A kind of equipment and its detection method for nuclear fuel rod Surface testing |
| CN113118669B (en) * | 2019-12-30 | 2023-05-12 | 中核北方核燃料元件有限公司 | Rod bundle carrying clamp for picking up integrated end plate |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499595A (en) * | 1981-10-01 | 1985-02-12 | General Electric Co. | System and method for pattern recognition |
| JPH1123756A (en) * | 1997-07-04 | 1999-01-29 | Hitachi Ltd | Method for identifying atomic fuel rod |
| KR19990036377U (en) * | 1998-02-20 | 1999-09-27 | 김형벽 | Lighting device for nuclear fuel rod number recognition machine vision system |
| JP2000162451A (en) * | 1998-11-25 | 2000-06-16 | Japan Nuclear Fuel Co Ltd<Jnf> | Outer surface image reader for rod-shaped body |
| JP2005164301A (en) * | 2003-11-28 | 2005-06-23 | Toshiba Corp | Automatic inspection device for fuel rod for nuclear reactor |
| CN105097057A (en) * | 2015-08-28 | 2015-11-25 | 中国科学院合肥物质科学研究院 | Grayscale image based nuclear reactor main pump failure auxiliary diagnosis system and method |
| CN106601315A (en) * | 2016-11-02 | 2017-04-26 | 中国核电工程有限公司 | Full-automatic helium leakage detection device for fuel rods |
| CN107039092A (en) * | 2017-05-31 | 2017-08-11 | 岭澳核电有限公司 | Fuel rod detection device |
| CN107170499A (en) * | 2017-05-31 | 2017-09-15 | 岭澳核电有限公司 | A kind of nuclear fuel detection means and method |
| CN107578831A (en) * | 2017-07-28 | 2018-01-12 | 上海交通大学 | A kind of flow-field visualized measuring system of transverse direction based on compensation of refractive index and method |
| CN208781580U (en) * | 2018-08-22 | 2019-04-23 | 成都术有云视觉科技有限公司 | A kind of linear array identifying system of fuel rod end plug conicoid mark character |
-
2018
- 2018-08-22 CN CN201810960357.2A patent/CN108986942B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499595A (en) * | 1981-10-01 | 1985-02-12 | General Electric Co. | System and method for pattern recognition |
| JPH1123756A (en) * | 1997-07-04 | 1999-01-29 | Hitachi Ltd | Method for identifying atomic fuel rod |
| KR19990036377U (en) * | 1998-02-20 | 1999-09-27 | 김형벽 | Lighting device for nuclear fuel rod number recognition machine vision system |
| JP2000162451A (en) * | 1998-11-25 | 2000-06-16 | Japan Nuclear Fuel Co Ltd<Jnf> | Outer surface image reader for rod-shaped body |
| JP2005164301A (en) * | 2003-11-28 | 2005-06-23 | Toshiba Corp | Automatic inspection device for fuel rod for nuclear reactor |
| CN105097057A (en) * | 2015-08-28 | 2015-11-25 | 中国科学院合肥物质科学研究院 | Grayscale image based nuclear reactor main pump failure auxiliary diagnosis system and method |
| CN106601315A (en) * | 2016-11-02 | 2017-04-26 | 中国核电工程有限公司 | Full-automatic helium leakage detection device for fuel rods |
| CN107039092A (en) * | 2017-05-31 | 2017-08-11 | 岭澳核电有限公司 | Fuel rod detection device |
| CN107170499A (en) * | 2017-05-31 | 2017-09-15 | 岭澳核电有限公司 | A kind of nuclear fuel detection means and method |
| CN107578831A (en) * | 2017-07-28 | 2018-01-12 | 上海交通大学 | A kind of flow-field visualized measuring system of transverse direction based on compensation of refractive index and method |
| CN208781580U (en) * | 2018-08-22 | 2019-04-23 | 成都术有云视觉科技有限公司 | A kind of linear array identifying system of fuel rod end plug conicoid mark character |
Non-Patent Citations (2)
| Title |
|---|
| 基于机器视觉的曲面字符缺陷检测系统研究;郭康;黄丹平;王磊;汪俊其;徐同旭;;现代制造工程;20161218(12);全文 * |
| 食用油激光喷码视觉检测分拣系统;张培恒;董浩;王博;孙瑞轩;;电子产品世界;20180604(06);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108986942A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108918543B (en) | Dynamic detection device and method for mirror surface scratch | |
| CN110935644B (en) | Bearing needle roller size detection system and method based on machine vision | |
| CN101226108B (en) | Method for testing droplet distribution consistency degree | |
| CN108986942B (en) | Linear array recognition system for marking characters on conical surface of end plug of fuel rod | |
| LeBourgeois | Robust multifont OCR system from gray level images | |
| CN206139527U (en) | Panoramic vision potato is selected separately and defect detecting device | |
| CN107014291B (en) | A kind of vision positioning method of material precision transfer platform | |
| CN108120353B (en) | Fire transmission hole detection device and method based on intelligent camera | |
| CN108416765B (en) | Method and system for automatically detecting character defects | |
| CN103669182B (en) | Pavement crack recognition method based on camera and line laser | |
| CN105809166A (en) | Vehicle license plate recognition method, device and system | |
| CN104881665A (en) | Chip character identification and verification method and apparatus | |
| CN106179992B (en) | A kind of wheel hub Automated Sorting System and its method for sorting | |
| CN111583193B (en) | Pistachio nut framework extraction device based on geometric contour template matching and algorithm thereof | |
| CN107966102A (en) | A kind of plate production six-face detection device | |
| CN210071686U (en) | Fruit grading plant based on orthogonal binocular machine vision | |
| DE102016211910A1 (en) | Inspection apparatus and method for inspecting containers disposed in an emptying box | |
| CN112354874A (en) | Coal and gangue identification method and gangue automatic separation system | |
| CN113567448A (en) | Method and device for detecting three-dimensional visual object of industrial product | |
| CN109325486B (en) | Area array recognition system for marking characters on conical surface of end plug of fuel rod | |
| CN212093316U (en) | Wood defect detection device based on kinect camera | |
| CN117019671A (en) | Appearance defect detection device of metal corrugated pipe | |
| CN110793454A (en) | Device and method for detecting plug jack depth by laser | |
| CN208450832U (en) | The full-automatic integrated application system of 3D laser index carving | |
| CN106097243A (en) | A kind of 3D map quick molding method utilizing camera to shoot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |