CN117007601A - Light guide plate defect detection device and method - Google Patents
Light guide plate defect detection device and method Download PDFInfo
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- CN117007601A CN117007601A CN202310940550.0A CN202310940550A CN117007601A CN 117007601 A CN117007601 A CN 117007601A CN 202310940550 A CN202310940550 A CN 202310940550A CN 117007601 A CN117007601 A CN 117007601A
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- 238000001514 detection method Methods 0.000 title claims abstract description 125
- 230000007547 defect Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 97
- 239000007921 spray Substances 0.000 claims abstract description 19
- 239000007888 film coating Substances 0.000 claims description 17
- 238000009501 film coating Methods 0.000 claims description 17
- 238000010030 laminating Methods 0.000 claims description 10
- 238000012937 correction Methods 0.000 claims description 6
- 230000002950 deficient Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 239000000956 alloy Substances 0.000 description 15
- 229910045601 alloy Inorganic materials 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 7
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- 238000003384 imaging method Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 208000025962 Crush injury Diseases 0.000 description 1
- 206010027146 Melanoderma Diseases 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/13—Moving of cuvettes or solid samples to or from the investigating station
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/0099—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor comprising robots or similar manipulators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
The invention provides a light guide plate defect detection device, which comprises a cleaning unit, a detection unit, a classification film-covering unit, a conveying unit and a rack which are sequentially arranged; the cleaning unit comprises a cleaning machine box body, a spray head assembly and a cleaning roller, wherein the spray head assembly and the cleaning roller are arranged on the cleaning machine box body; the detection unit comprises a first detection module for detecting the conventional defects of the light guide plate, a second detection module for detecting the black points and the collapse angles of the light guide plate and a third detection module for detecting the size of the light guide plate, wherein the first detection module comprises a first area array camera and a second area array camera which are oppositely arranged, the second detection module comprises a first frame camera positioned above the conveying unit, the third detection module comprises at least two second frame cameras positioned above the conveying unit, and the at least two second frame cameras are arranged at intervals along the conveying direction of the conveying unit. The invention has simple structure, wide applicability and higher detection accuracy.
Description
Technical Field
The invention relates to a detection device, in particular to a device and a method for detecting defects of a light guide plate, and belongs to the technical field of visual detection.
Background
The light guide plate is an optical device made of high-tech materials, and is widely applied to various LED illumination fields and display screens, such as televisions, flat panels, mobile phones and the like. The light guide plate is manufactured by using an optical acrylic or PC plate as a base material, and printing light guide points with different sizes, shapes and densities on the bottom of the base material by using the technologies such as laser engraving, V-shaped cross grid engraving or UV screen printing, so that the light guide plate can absorb light emitted from a lamp source and stay on the surface. Each light guide point enables light rays to be reflected and diffused on the surface of the light guide plate and finally emitted from the front surface, and uniform light emitting effect is achieved.
The production quality of the light guide plate is affected by various factors, such as substrate quality, manufacturing errors, technological processes, transportation damage, pollution and the like in the production process, so that the light guide plate has defects of surface scratches, bending, deformation, pollution and the like, and therefore the defect detection of the light guide plate is very important for improving the quality of batch finished products of the light guide plate.
In the prior art, a part of research and development on automatic detection equipment for detecting defects of a light guide plate has been completed. The invention patent application of China with the application number of 2021107830319 discloses a large-size liquid crystal display light guide plate defect detection device and a detection method, wherein the on-line scratch, stain, shadow, bright spot and other defect detection of a light guide plate product is realized by arranging a light guide plate line scratch and black point defect imaging device and a light guide plate shadow and white point defect imaging device, so that the production detection operation of the light guide plate product is replaced by manual work, and the production quality of the light guide plate product is effectively improved. The large-size liquid crystal display light guide plate defect detection equipment respectively acquires line scratch, crush injury and black spot defects and shadow and white spot defects through the two large-size image acquisition devices, but has slightly poorer recognition on stains on the surface of the light guide plate and is easy to interfere with detection accuracy by the stains on the surface of the light guide plate.
Another example is that chinese patent application No. 2018115391805 discloses a light guide plate defect detection apparatus and a detection method, which avoid the influence on the detection result when the light guide plate is uneven, perform dual detection on the point defect and the line defect of the light guide plate, avoid false detection and missing detection, and set three detection stations to comprehensively detect various defects such as bright spots, black spots, line scratches, broken angles, shadows, dirt and the like of the light guide plate. The detection station structure of the light guide plate defect detection equipment is complex, multiple types and numbers of cameras are specially arranged for different defects to collect images, and the equipment cost is increased.
In summary, research and development of a light guide plate defect detection device with a simplified structure and capable of ensuring detection accuracy is of great significance to technical development in the field.
Disclosure of Invention
Based on the background, the invention aims to provide the light guide plate defect detection device which has the advantages of simple structure, wide applicability and higher detection accuracy.
Another object of the present invention is to provide a method for detecting defects of a light guide plate.
In order to achieve the above object, the present invention provides the following technical solutions:
the defect detection device for the light guide plate comprises a cleaning unit, a detection unit and a classification film-covering unit which are sequentially arranged, a conveying unit for sequentially conveying the light guide plate to the cleaning unit, the detection unit and the classification film-covering unit, and a rack for installing the cleaning unit, the detection unit, the classification film-covering unit and the conveying unit;
the cleaning unit comprises a cleaning machine box body, a spray head assembly and a cleaning roller, wherein the spray head assembly and the cleaning roller are arranged on the cleaning machine box body;
the detection unit comprises a first detection module for detecting the conventional defects of the light guide plate, a second detection module for detecting black points and collapse angles of the light guide plate and a third detection module for detecting the size of the light guide plate, wherein the first detection module comprises a first area array camera and a second area array camera which are oppositely arranged, the first area array camera is positioned below the conveying unit, the second area array camera is positioned above the conveying unit, the second detection module comprises a first frame camera positioned above the conveying unit, the third detection module comprises at least two second frame cameras positioned above the conveying unit, and the at least two second frame cameras are arranged at intervals along the conveying direction of the conveying unit;
the classification film covering unit comprises a mechanical arm module for classifying the light guide plates and a film covering module for covering the light guide plates.
Preferably, the spray head assembly comprises a cleaning spray head and an air pressure spray head, wherein the cleaning spray head is arranged above the cleaning roller, and the air pressure spray head is arranged below the cleaning roller and is positioned at the side part of the conveying unit; the number of the cleaning rollers is multiple, the cleaning rollers are distributed and arranged in groups up and down, a space for the light guide plate to pass through is reserved between the two groups of cleaning rollers, the cleaning unit further comprises a roller driving piece for driving the cleaning rollers to rotate relative to the box body of the cleaning machine, and a hairbrush is arranged on the surface of the cleaning rollers.
Preferably, the cleaning unit further includes a position correction module for correcting a position of the light guide plate entering the cleaning unit on the conveying unit.
Preferably, the first detection module further comprises a first camera bearing platform, a first camera longitudinal sliding piece, a first camera transverse sliding piece, a second camera bearing platform, a second camera longitudinal sliding piece, a second camera transverse sliding piece and a first light source, the first camera bearing platform is slidingly connected with the first camera bearing platform through the first camera longitudinal sliding piece and the first camera transverse sliding piece, the first camera bearing platform is fixed below the conveying unit, the second camera bearing platform is slidingly connected with the second camera bearing platform through the second camera longitudinal sliding piece and the second camera transverse sliding piece, the second camera bearing platform is fixed above the conveying unit, and the first light source is located between the conveying unit and the first camera.
Preferably, the second detection module further comprises a third camera bearing platform, a third camera longitudinal sliding piece, a second light source and a second light source longitudinal sliding piece, the first frame camera is slidably connected with the third camera bearing platform through the third camera longitudinal sliding piece, the third camera bearing platform is arranged above the conveying unit, the second light source is slidably connected with the rack through the second light source longitudinal sliding piece, the second light source is located below the conveying unit, the second light source is arranged relative to the first frame camera, and a second light source hole is formed in a position, corresponding to the second light source, of the rack.
Preferably, the third detection module further comprises a fourth camera bearing platform, a third light source and a third light source longitudinal sliding piece, at least two second frame cameras are arranged on the fourth camera bearing platform, the fourth camera bearing platform is arranged above the conveying unit, the third light source is connected with the frame in a sliding manner through the third light source longitudinal sliding piece, the third light source is located below the conveying unit, the third light source is arranged relative to the at least two second frame cameras, and a third light source hole is formed in a position, corresponding to the third light source, of the frame.
Preferably, the conveying unit comprises a plurality of conveying modules, at least two conveying modules are arranged in front of the cleaning unit in parallel and can slide relative to the frame, the sliding directions are mutually perpendicular to the conveying directions of the conveying modules on a horizontal plane, at least one conveying module is arranged at a corresponding position of the cleaning unit, at least one conveying module is arranged at a corresponding position of the first detecting module, at least one conveying module is arranged at a corresponding position of the second detecting module, and at least one conveying module is arranged at a corresponding position of the third detecting module.
Preferably, each conveying module comprises a conveying platform, a conveying belt part, a driving belt part and a driving motor, wherein the conveying belt part, the driving belt part and the driving motor are arranged on the conveying platform, and the power output end of the driving motor drives the conveying belt part to move relative to the conveying platform through the driving belt part.
Preferably, the number of the film coating modules is at least two, and the at least two film coating modules are respectively positioned at two sides of the mechanical arm module.
A method for detecting defects of a light guide plate by adopting the light guide plate defect detection device, which comprises the following steps:
the light guide plate is placed in the conveying unit, the conveying unit conveys the light guide plate to pass through the cleaning unit, the spray head assembly is used for flushing the light guide plate, and the cleaning roller is used for cleaning the light guide plate, so that the top surface and the bottom surface of the light guide plate are cleaned;
the clean light guide plate passes through a first detection module, and the first area array camera and the second area array camera are used for carrying out image shooting to detect conventional defects, and then the conventional defects are conveyed to a second detection module by a conveying unit;
the light guide plate passes through the second detection module, the first frame camera is used for image shooting and checking black points and collapse angles, and then the light guide plate is conveyed to the third detection module by the conveying unit;
the light guide plate passes through a third detection module, at least two strip frame cameras are used for image shooting and dimension checking, and then the light guide plate is conveyed to the mechanical arm module by a conveying unit;
and the mechanical arm module moves the light guide plate judged to be qualified and the light guide plate judged to be defective to the corresponding film coating module according to the detection result to carry out film coating.
Compared with the prior art, the invention has the following advantages:
according to the defect detection device for the light guide plate, disclosed by the invention, dirt on the surface of the light guide plate is removed through the cleaning unit, the detection accuracy of the detection unit is improved, the high-quality image acquisition is carried out on the two sides of the light guide plate through the first detection module with the first area array camera and the second area array camera, the conventional defect judgment is carried out, the black point and the collapse angle of the light guide plate are detected through the second detection module with the first frame camera, the size of the light guide plate is detected through the third detection module with at least two second frame cameras, and finally the qualified light guide plate and the light guide plate with defects are classified through the mechanical arm module and transferred to the corresponding film covering module for film covering, so that the subsequent light guide plate is convenient to transport and store; the invention has simple structure, wide applicability and higher detection accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing the overall structure of a light guide plate defect detecting device according to the present invention;
FIG. 2 is a schematic perspective view of a first transport module and a second transport module according to the present invention;
FIG. 3 is a schematic perspective view of a cleaning unit according to the present invention;
FIG. 4 is a schematic side view of a cleaning unit according to the present invention;
FIG. 5 is a schematic perspective view of a first detection module according to the present invention;
FIG. 6 is a schematic side view of a first camera side slide and a first camera side slide in accordance with the present invention;
FIG. 7 is a schematic perspective view of a second detection module and a third detection module according to the present invention;
FIG. 8 is a schematic side view of a second detection module and a third detection module according to the present invention;
fig. 9 is a schematic perspective view of a membrane module according to the present invention.
In the figure: 100. a cleaning unit; 200. a detection unit; 300. classifying the film covering units; 1. fixing the foot rest; 2. a universal wheel; 3. a first alloy frame; 4. a first platform floor; 5. a sliding seat; 6. a conveying belt wheel I; 7. a conveyor belt; 8. a conveyor belt side plate; 9. a first driving motor; 10. a conveying belt wheel II; 11. a light guide plate to be tested; 12. a motor fixing frame; 13. a transmission belt; 14. a transmission belt wheel; 15. a second driving motor; 16. a sliding guide rail; 17. a guide rail platform; 18. a fixing bolt; 19. a platform plate support column; 20. fixing a counterweight plate; 21. a support column; 22. a mounting platform; 23. a conveyor belt axle; 24. a conveyor belt III; 25. a position correction module; 26. an air pressure nozzle; 27. a first operating status indicator light; 28. cleaning the spray head; 29. a program selection panel; 30. an emergency stop button; 31. operating a display screen; 32. a second operating status indicator light; 33. a cleaning roller; 34. a cleaner box; 35. a third driving motor; 36. a fixed bracket; 37. a drum driving member; 38. a first camera support platform; 39. a first camera longitudinal slide; 40. a first camera lateral slide; 41. a first area camera; 42. a camera platform support column; 43. a conveyor belt IV; 44. a light source fixing plate; 45. a first light source; 46. a second area camera; 47. a second camera support platform; 48. a second camera traverse slide; 49. a second camera longitudinal slide; 50. a second platform floor; 51. a first camera platform alloy frame; 52. a second alloy frame; 53. a fourth driving motor; 54. a screw rod; 55. a stroke optical axis; 56. a second light source hole; 57. a first frame camera; 58. a third camera carrying platform; 59. a third camera longitudinal slide; 60. a first compression nut; 61. a second frame camera; 62. a fourth camera support platform; 63. a robotic arm platform; 64. a conveyor belt V; 65. a transport module mount; 66. a fifth driving motor; 67. a second camera platform alloy frame; 68. a second compression nut; 69. a second light source longitudinal slide; 70. a second light source; 71. a sixth driving motor; 72. a third alloy frame; 73. a roller film laminating machine; 74. a side plate; 75. a film coating platform; 76. and the classified light guide plate.
Detailed Description
The technical scheme of the invention is further specifically described below through specific embodiments and with reference to the accompanying drawings. It should be understood that the practice of the invention is not limited to the following examples, but is intended to be within the scope of the invention in any form and/or modification thereof.
In the present invention, unless otherwise specified, all parts and percentages are by weight, and the equipment, materials, etc. used are commercially available or are conventional in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components and devices in the following examples are, unless otherwise indicated, all those components and devices known to those skilled in the art, and their structures and principles are known to those skilled in the art from technical manuals or by routine experimentation.
In the following detailed description of embodiments of the invention, reference is made to the accompanying drawings, in which, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. However, one or more embodiments may be practiced by one of ordinary skill in the art without these specific details.
As shown in fig. 1, an embodiment of the present invention discloses a light guide plate defect detecting device including a cleaning unit 100, a detecting unit 200, a sorting and laminating unit 300, a conveying unit for conveying a light guide plate to the cleaning unit 100, the detecting unit 200, and the sorting and laminating unit 300 in this order, and a rack for mounting the cleaning unit 100, the detecting unit 200, the sorting and laminating unit 300, and the conveying unit. The conveying unit comprises six conveying modules, the first conveying module and the second conveying module are arranged in parallel in front of the cleaning unit 100 and can slide relative to the frame, and the sliding direction is perpendicular to the conveying direction of the conveying modules on the horizontal plane. The third transport module is disposed at a corresponding position of the cleaning unit 100. The fourth conveying module is arranged at a corresponding position of the first detecting module. The fifth conveying module is arranged at a corresponding position of the second detecting module. The sixth conveying module is arranged at a corresponding position of the third detecting module. Each conveying module comprises a conveying platform, a conveying belt 7 part, a driving belt 13 part and a driving motor, wherein the conveying belt 7 part, the driving belt 13 part and the driving motor are arranged on the conveying platform, and the power output end of the driving motor drives the conveying belt 7 part to move relative to the conveying platform through the driving belt 13 part.
As shown in fig. 2, the first and second transport modules are slidably coupled to a portion of the frame. The part of the frame comprises a first alloy frame 3, universal wheels 2 and a fixed foot rest 1 which are arranged at the bottom of the first alloy frame 3, and a first platform bottom plate 4 which is arranged at the top of the first alloy frame 3, wherein the first platform bottom plate 4 is fixedly connected with a fixed counterweight plate 20 positioned at the bottom of the first alloy frame 3 through a platform plate support column 19, the first platform bottom plate 4 is of a multi-layer plate structure, and the multi-layer plates are fixedly connected through fixing bolts 18. The structure of the other parts of the frame refers to the structure of the frame of the part, and will not be described in detail here.
The first conveying module and the second conveying module are identical in structure and comprise conveying belt wheels I6, conveying belt wheels II10, driving belt wheels 14, a driving belt 13, a conveying belt 7, a conveying belt side plate 8, a motor fixing frame 12 and a driving motor, the conveying belt wheels I6 and the conveying belt wheels II10 are matched with the conveying belt 7 to form conveying belt 7 parts, the driving belt wheels 14 and the driving belt 13 form driving belt 13 parts, the driving motor is fixed on the motor fixing frame 12, and the output end of the driving motor drives the conveying belt 7 to move through the driving belt 13 parts, so that conveying of the guide plate is realized. The driving motor of the first conveying module is a first driving motor 9, and the driving motor of the second conveying module is a second driving motor 15. The first conveying module and the second conveying module are used for conveying the light guide plates 11 to be tested with different specifications, and the first conveying module and the second conveying module are slid to enable the first conveying module or the second conveying module to be suitable for corresponding to the inlet part of the cleaning unit 100. The first conveying module and the second conveying module are in sliding connection with a part of the frame through the following structure, the sliding seat 5, the sliding guide rail 16 and the guide rail platform 17, the sliding seat 5 is in sliding connection with the guide rail platform 17 through the sliding guide rail 16, the first conveying module and the second conveying module are arranged on the sliding seat 5, and the guide rail platform 17 is fixed on the surface of the first platform bottom plate 4.
The cleaning unit 100 cleans the surface dirt passing through the light guide plate therein, reducing the false recognition rate of the subsequent detection. As shown in fig. 3 and 4, the cleaning unit 100 includes a cleaning machine casing 34, a spray head assembly provided to the cleaning machine casing 34, a cleaning drum 33, and a drum driving part 37 for driving the cleaning drum 33 to rotate relative to the cleaning machine casing 34, and a brush is provided on the surface of the cleaning drum 33. The nozzle assembly comprises a cleaning nozzle 28 and an air pressure nozzle 26, wherein the cleaning nozzle 28 is arranged above the cleaning roller 33, the air pressure nozzle 26 is arranged below the cleaning roller 33 and is positioned at the side part of the conveying unit, the air pressure nozzle 26 blows off dirt on the surface of the light guide plate through air with pressure, and the cleaning nozzle 28 is matched with the cleaning roller 33 to clean the surface of the light guide plate. The number of the cleaning rollers 33 is plural, the plural cleaning rollers 33 are arranged in a vertically-arranged group, and a space for passing the light guide plate is provided between the two groups of cleaning rollers 33. The cleaning machine box 34 is further provided with a program selection panel 29, an operation display screen 31, a first operation state indicator lamp 27, a second operation state indicator lamp 32 and an emergency stop button 30 which are electrically connected with the program selection panel 29, a cleaning program is selected through the program selection panel 29, the operation state of the cleaning unit 100 is observed through the operation display screen 31, the first operation state indicator lamp 27 and the second operation state indicator lamp 32, and the operation of the cleaning unit 100 is rapidly stopped through the emergency stop button 30. The cleaning unit 100 further includes a position correction module 25, and the position correction module 25 is configured to correct a position of the light guide plate entering the cleaning unit 100 on the conveying unit. The third delivery module is used in cooperation with the cleaning unit 100, and has a structure similar to that of the first delivery module, and is fixed on the mounting platform 22 through the fixing bracket 36, and the bottom of the mounting platform 22 is fixedly connected with the top of the rack through the supporting column 21. The driving motor of the third conveying module is a third driving motor 35, the conveying belt 7 wheels are arranged in parallel and are connected through the conveying belt wheel shafts 23, and each conveying belt 7 wheel is correspondingly provided with a conveying belt III24.
The detection unit 200 includes a first detection module for detecting a conventional defect of the light guide plate, a second detection module for detecting black spots and a break angle of the light guide plate, and a third detection module for detecting the size of the light guide plate. The detecting unit 200 is mounted on another part of the frame, the top of the frame of the part is a second platform bottom plate 50, the foot rest 1 is fixedly connected and fixed through a second alloy frame 52, and the surface of the second platform bottom plate 50 is provided with a first camera platform alloy frame 51 and a second camera platform alloy frame 67 which are fixedly connected with the second platform bottom plate 50.
As shown in fig. 5, the first detection module is used in cooperation with a fourth conveying module, the structure of the fourth conveying module is similar to that of the third conveying module, a conveying belt 7 of the fourth conveying module is a conveying belt IV43, and the driving motor is a fourth driving motor 53. The first detection module comprises a first area-array camera 41 and a second area-array camera 46 which are oppositely arranged, the first area-array camera 41 is positioned below the conveying unit, and the second area-array camera 46 is positioned above the conveying unit and is mounted on the first camera platform alloy frame 51. The first detection module further comprises a first camera carrying platform 38, a first camera longitudinal slide 39, a first camera lateral slide 40, a second camera carrying platform 47, a second camera longitudinal slide 49, a second camera lateral slide 48 and a first light source 45, and the first panel camera 41 is slidably connected to the first camera carrying platform 38 through the first camera longitudinal slide 39 and the first camera lateral slide 40. The first camera support platform 38 is secured to the bottom of the second platform floor 50 by the camera platform support posts 42 and is located below the fourth transport module. The second panel camera 46 is slidably connected to a second camera carrying platform 47 by a second camera longitudinal slide 49 and a second camera transverse slide 48. The second camera carrying platform 47 is fixed above the fourth conveying module, and the first light source 45 is mounted between the fourth conveying module and the first area camera 41 through the light source fixing plate 44.
The first camera longitudinal slider 39 and the first camera lateral slider 40 each have a structure including a slide base, a screw, and a stroke optical axis 55 as shown in fig. 6, the first camera lateral slider 40 mounted on the first camera longitudinal slider 39 is slid along the stroke optical axis 55 by adjusting the screw, and the second camera longitudinal slider 49 and the second camera lateral slider 48 are the same as the above-described structure.
As shown in fig. 7, the second detection module is used in cooperation with a fifth conveying module, the structure of the fifth conveying module is similar to that of the third conveying module, a conveying belt 7 of the fifth conveying module is a conveying belt V64, a driving motor is a fifth driving motor 66, and the fifth conveying module is fixedly connected with the second platform base plate 50 through a conveying module fixing member 65. The second detection module includes a first frame camera 57, a third camera carrying platform 58, a third camera longitudinal slide 59, a second light source 70, and a second light source longitudinal slide 69. The first frame camera 57 is located above the conveying unit, the first frame camera 57 is slidably connected to the third camera carrying platform 58 through the third camera longitudinal sliding member 59, the third camera carrying platform 58 is disposed above the conveying unit and mounted on the second camera platform alloy frame 67, and a first locking nut is disposed on top of the third camera carrying platform 58. As shown in fig. 8, the second light source 70 is slidably connected to the frame by a second light source longitudinal slider 69, and the second light source 70 is located below the conveying unit, and a second tightening nut 68 is provided at the bottom of the second light source longitudinal slider 69. The second light source 70 is disposed opposite to the first frame camera 57, and a second light source hole 56 is provided at a portion of the frame corresponding to the second light source 70. It should be noted that, the frame camera in this embodiment specifically refers to an area camera in which an image capturing mode is set to capture one image.
The third detection module is used in cooperation with a sixth conveying module, the structure of the sixth conveying module is similar to that of the third conveying module, and the driving motor of the sixth conveying module is a sixth driving motor 71 arranged below the second platform bottom plate 50. The third detection module comprises two second frame cameras 61 located above the conveying unit, a fourth camera carrying platform 62, a third light source and a third light source longitudinal slide. The two second frame cameras 61 are arranged at intervals along the conveying direction of the conveying unit, the two second frame cameras 61 are arranged on the fourth camera bearing platform 62, the fourth camera bearing platform 62 is arranged above the sixth conveying module, the third light source is connected with the frame in a sliding mode through the third light source longitudinal sliding piece, the third light source is located below the conveying module and is arranged relative to the at least two second frame cameras 61, and a third light source hole is formed in a position, corresponding to the third light source, of the frame.
The sorting and laminating unit 300 includes a robot arm module for sorting the light guide plates and a laminating module for laminating the light guide plates. The number of the film coating modules is two, and the two film coating modules are respectively positioned at two sides of the mechanical arm module. The robot arm module is mounted on a robot arm platform 63 fixed on the surface of the second platform base plate 50, and the robot arm platform 63 is located in the conveying direction of the sixth conveying module. Each film coating module comprises a roller film coating machine 73 arranged on the other part of the frame, the other part of the frame is provided with a third alloy frame 72, the top of the frame is provided with a film coating platform 75, and the side part of the film coating platform 75 is provided with a side plate 74 for preventing the classified light guide plate 76 from falling.
The defect detection device for the light guide plate has the advantages that: the whole device can be directly matched with an enterprise automatic production line for use, so that the use cost is reduced; the air pressure nozzle 26 and the cleaning roller 33 with the brush in the cleaning unit 100 can well remove the surface dirt of the light guide plate, and the accuracy of subsequent detection is improved; the spatial position of each camera bearing platform in the detection unit 200 can be adjusted through each sliding piece adjusting device, so that the transverse position and the longitudinal position of each camera in the space are adjusted, and the adjustment of the positions improves the applicability of the whole device to the acquisition of high-quality images of different types of light guide plates; the detection unit 200 selects proper light sources for different detection modules, so that the adaptability of the whole device in different working scenes is improved; the cameras are controlled to collect high-quality light guide plate images, image processing analysis is completed according to the collected images, and whether the light guide plate is qualified or not is judged by detecting conventional defects, black points, collapse angles and size detection of the light guide plate; the scanning effect of the line scanning camera is simulated by using the area array camera, so that the cost is further reduced; classifying the light guide plates by using a mechanical arm, and coating the classified light guide plates 76 in batches, so that the light guide plates are better convenient to store and transport subsequently; the defect detection device for the light guide plate can realize automatic operation, further improves the production efficiency of the light guide plate, further reduces the detection cost of the light guide plate product, has simple structure and wide applicability, and has higher detection accuracy.
The embodiment of the invention also discloses a method for detecting the defect of the light guide plate by adopting the device for detecting the defect of the light guide plate, which comprises the following steps:
the light guide plate is placed on the conveying unit, the conveying unit conveys the light guide plate through the cleaning unit 100, the nozzle assembly performs the cleaning of the light guide plate, and the cleaning roller 33 cleans the light guide plate, so that the top surface and the bottom surface of the light guide plate are cleaned;
the cleaned light guide plate passes through the first detection module, is subjected to image photographing by the first and second area cameras 41 and 46 to check for conventional defects, and is then conveyed to the second detection module by the conveying unit;
the light guide plate passes through the second detection module, the first frame camera 57 performs image shooting to check black spots and broken angles, and then the light guide plate is conveyed to the third detection module by the conveying unit;
the light guide plate passes through a third detection module, at least two strip frame cameras are used for image shooting and dimension checking, and then the light guide plate is conveyed to the mechanical arm module by a conveying unit;
and the mechanical arm module moves the light guide plate judged to be qualified and the light guide plate judged to be defective to the corresponding film coating module according to the detection result to carry out film coating.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (10)
1. The utility model provides a light guide plate defect detection device which characterized in that: the light guide plate defect detection device comprises a cleaning unit (100), a detection unit (200) and a sorting film-covering unit (300) which are sequentially arranged, a conveying unit for conveying the light guide plate to the cleaning unit (100), the detection unit (200) and the sorting film-covering unit (300) in sequence, and a rack for mounting the cleaning unit (100), the detection unit (200), the sorting film-covering unit (300) and the conveying unit;
the cleaning unit (100) comprises a cleaning machine box (34), a spray head assembly arranged on the cleaning machine box (34) and a cleaning roller (33);
the detection unit (200) comprises a first detection module for detecting the conventional defects of the light guide plate, a second detection module for detecting black spots and collapse angles of the light guide plate and a third detection module for detecting the size of the light guide plate, wherein the first detection module comprises a first area camera (41) and a second area camera (46) which are oppositely arranged, the first area camera (41) is positioned below the conveying unit, the second area camera (46) is positioned above the conveying unit, the second detection module comprises a first frame camera (57) positioned above the conveying unit, the third detection module comprises at least two second frame cameras (61) positioned above the conveying unit, and the at least two second frame cameras (61) are arranged at intervals along the conveying direction of the conveying unit;
the sorting and laminating unit (300) comprises a mechanical arm module for sorting the light guide plates and a laminating module for laminating the light guide plates.
2. The light guide plate defect detection apparatus according to claim 1, wherein: the spray head assembly comprises a cleaning spray head (28) and an air pressure spray head (26), wherein the cleaning spray head (28) is arranged above the cleaning roller (33), and the air pressure spray head (26) is arranged below the cleaning roller (33) and is positioned at the side part of the conveying unit; the number of the cleaning rollers (33) is multiple, the cleaning rollers (33) are distributed and arranged in groups up and down, a space for the light guide plate to pass through is reserved between the two groups of cleaning rollers (33), the cleaning unit (100) further comprises a roller driving piece (37) for driving the cleaning rollers (33) to rotate relative to the box body (34) of the cleaning machine, and a hairbrush is arranged on the surface of the cleaning rollers (33).
3. The light guide plate defect detection apparatus according to claim 1, wherein: the cleaning unit (100) further comprises a position correction module (25), wherein the position correction module (25) is used for correcting the position of the light guide plate entering the cleaning unit (100) on the conveying unit.
4. The light guide plate defect detection apparatus according to claim 1, wherein: the first detection module further comprises a first camera bearing platform (38), a first camera longitudinal sliding part (39), a first camera transverse sliding part (40), a second camera bearing platform (47), a second camera longitudinal sliding part (49), a second camera transverse sliding part (48) and a first light source (45), the first camera bearing platform (38) is connected with the first camera (41) in a sliding mode through the first camera longitudinal sliding part (39) and the first camera transverse sliding part (40), the first camera bearing platform (38) is fixed below the conveying unit, the second camera (46) is connected with the second camera bearing platform (47) in a sliding mode through the second camera longitudinal sliding part (49) and the second camera transverse sliding part (48), the second camera bearing platform (47) is fixed above the conveying unit, and the first light source (45) is located between the conveying unit and the first camera (41).
5. The light guide plate defect detection apparatus according to claim 1, wherein: the second detection module further comprises a third camera bearing platform (58), a third camera longitudinal sliding part (59), a second light source (70) and a second light source longitudinal sliding part (69), the first frame camera (57) is connected with the third camera bearing platform (58) in a sliding mode through the third camera longitudinal sliding part (59), the third camera bearing platform (58) is arranged above the conveying unit, the second light source (70) is connected with the frame in a sliding mode through the second light source longitudinal sliding part (69), the second light source (70) is located below the conveying unit, the second light source (70) is arranged relative to the first frame camera (57), and a second light source hole (56) is formed in a position, corresponding to the second light source (70), of the frame.
6. The light guide plate defect detection apparatus according to claim 1, wherein: the third detection module further comprises a fourth camera bearing platform (62), a third light source and a third light source longitudinal sliding piece, at least two second frame cameras (61) are arranged on the fourth camera bearing platform (62), the fourth camera bearing platform (62) is arranged above the conveying unit, the third light source is connected with the rack in a sliding mode through the third light source longitudinal sliding piece, the third light source is located below the conveying unit, the third light source is arranged relative to the at least two second frame cameras (61), and a third light source hole is formed in the position, corresponding to the third light source, of the rack.
7. The light guide plate defect detection apparatus according to claim 1, wherein: the conveying unit comprises a plurality of conveying modules, at least two conveying modules are arranged in parallel in front of the cleaning unit (100) and can slide relative to the frame, the sliding directions are mutually perpendicular to the conveying directions of the conveying modules on a horizontal plane, at least one conveying module is arranged at a corresponding position of the cleaning unit (100), at least one conveying module is arranged at a corresponding position of the first detecting module, at least one conveying module is arranged at a corresponding position of the second detecting module, and at least one conveying module is arranged at a corresponding position of the third detecting module.
8. The light guide plate defect detection apparatus according to claim 7, wherein: each conveying module comprises a conveying platform, a conveying belt (7) part, a driving belt (13) part and a driving motor, wherein the conveying belt (7) part, the driving belt (13) part and the driving motor are arranged on the conveying platform, and the power output end of the driving motor drives the conveying belt (7) part to move relative to the conveying platform through the driving belt (13) part.
9. The light guide plate defect detection apparatus according to claim 1, wherein: the number of the film coating modules is at least two, and the at least two film coating modules are respectively positioned at two sides of the mechanical arm module.
10. A method for detecting defects of a light guide plate by using the light guide plate defect detecting device as claimed in any one of claims 1 to 9, characterized in that: the method comprises the following steps:
the light guide plate is placed in the conveying unit, the conveying unit conveys the light guide plate to pass through the cleaning unit (100), the spray head assembly is used for flushing the light guide plate, and the cleaning roller (33) is used for cleaning the light guide plate, so that the top surface and the bottom surface of the light guide plate are cleaned;
the clean light guide plate passes through a first detection module, and the first area array camera (41) and the second area array camera (46) are used for performing image shooting to detect conventional defects, and then the conventional defects are conveyed to a second detection module by a conveying unit;
the light guide plate passes through the second detection module, the first frame camera (57) is used for image shooting and checking black points and broken angles, and then the light guide plate is conveyed to the third detection module by the conveying unit;
the light guide plate passes through a third detection module, at least two strip frame cameras are used for image shooting and dimension checking, and then the light guide plate is conveyed to the mechanical arm module by a conveying unit;
and the mechanical arm module moves the light guide plate judged to be qualified and the light guide plate judged to be defective to the corresponding film coating module according to the detection result to carry out film coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310940550.0A CN117007601A (en) | 2023-07-28 | 2023-07-28 | Light guide plate defect detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310940550.0A CN117007601A (en) | 2023-07-28 | 2023-07-28 | Light guide plate defect detection device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117589773A (en) * | 2023-11-24 | 2024-02-23 | 苏州天禄光科技股份有限公司 | AOI detection equipment of light guide plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117589773A (en) * | 2023-11-24 | 2024-02-23 | 苏州天禄光科技股份有限公司 | AOI detection equipment of light guide plate |
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