Brightness spot detection equipment for polaroid

Abstract

The invention relates to the technical field of film glow point product detection, in particular to a polaroid glow point detection device which comprises a workbench, a feeding unit, a filter disc inspection unit, an optical positioning point recognition unit, a glow point detection unit and a discharging unit are sequentially arranged on the workbench, and the feeding unit comprises a moving module and a stock bin module; the moving module sucks the polaroid from the stock bin module and moves the polaroid to the filter disc inspection unit; a jig moving module of the filter disc inspection unit receives and bears the polaroid on the moving module, and a filter disc switching module of the filter disc inspection unit is used for selecting a filter disc corresponding to the polaroid; the bright spot detection unit comprises a manipulator, an adsorption jig, an adsorption jig moving module, a re-judgment camera and a warping detection camera, the manipulator sucks the polaroid on the jig moving module and carries the polaroid to the adsorption jig, and the adsorption jig moving module drives the adsorption jig to sequentially move to the re-judgment camera and the warping detection camera for shooting; and the full-automatic detection function of the bright spot film product is realized.

Description

Technical Field

[0001] The invention relates to the technical field of film bright spot product detection, in particular to a bright spot detection device for a polarizing film. Background Art

[0002] In the current market, there are very few thin film bright spot products, so the existing visual inspection equipment is not suitable for this type of product. During the inspection, many are directly judged as NG products. At this time, manual re-judgment is required one by one through precision inspection instruments, which wastes a lot of product and labor costs; and the existing manual work is unable to fully and efficiently identify whether each bright spot position has defects, resulting in some defective products being misjudged and flowing into the client.

[0003] Manual detection of bright spot products is rather troublesome and requires the use of different filters. In addition, sometimes the same type of product needs to be adapted to different filters due to the different sizes of bright spots, resulting in extremely low production efficiency.

[0004] In addition, the existing adsorption fixtures cannot meet the compatibility requirements of multiple products, and the center of the test needs to be adjusted according to the bright spot position of the product. In addition, warped products cannot be adsorbed flat due to uneven wind force, which makes visual inspection impossible and leads to misjudgment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a bright spot detection device for a polarizer.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a bright spot detection device for a polarizer, comprising a workbench and an outer cover arranged on the workbench, wherein a loading unit, a filter inspection unit, an optical positioning point recognition unit, a bright spot detection unit and a unloading unit are arranged in sequence on the workbench,

[0007] The loading unit includes a moving module and a silo module. The silo module is arranged at a loading position at one end of the moving module. The moving module absorbs the polarizer from the silo module and moves it to the filter inspection unit.

[0008] The filter inspection unit includes a jig moving module, a filter switching module and a first camera assembly, wherein the jig moving module receives and carries the polarizer on the moving module, the filter switching module is arranged above one end of the jig moving module and is used to select the filter corresponding to the polarizer, and the first camera assembly is installed above the filter switching module;

[0009] The optical positioning point recognition unit has a second camera assembly, which is mounted on one side of the first camera assembly;

[0010] The bright spot detection unit includes a manipulator, an adsorption jig, an adsorption jig moving module, a re-judgment camera and a warpage detection camera. The manipulator absorbs the polarizer on the jig moving module and moves it to the adsorption jig. The lower part of the adsorption jig has a hollow rotating table, and the hollow rotating table is arranged on the adsorption jig moving module. The adsorption jig moving module drives the adsorption jig to move to the re-judgment camera and the warpage detection camera in turn for shooting.

[0011] Furthermore, the silo module includes a bearing plate, a centering component, an electric cylinder and a base plate, the bearing plate is provided with a pair of X-axial grooves and a pair of Y-axial grooves, the centering component includes a pair of X-axis linear modules, an intermediate mounting plate and a pair of Y-axis linear modules, the Y-axis linear module is installed on the intermediate mounting plate, the slider of the Y-axis linear module is connected to the first clamping plate through a first connecting plate, the first clamping plate is located in the Y-axial groove, the X-axis linear module is installed on the base plate, the slider of the X-axis linear module is connected to the second clamping plate through a second connecting plate, the second clamping plate passes through the intermediate mounting plate and extends into the X-axial groove, a guide rod is provided on each of the four corners of the bearing plate, the guide rod passes through the intermediate mounting plate and the base plate in turn, the electric cylinder is installed on the bottom surface of the base plate, and the push rod of the electric cylinder passes through the intermediate mounting plate and is connected to the bottom surface of the bearing plate; linear bearings are installed between the bearing plate and the guide rod, and between the base plate and the guide rod.

[0012] Furthermore, thickness sensor components are provided on both sides of the silo module, and the thickness sensor components are composed of a sensor bracket and a thickness sensor installed on the sensor bracket.

[0013] Furthermore, the moving module includes a horizontal linear module, a vertical linear module and a suction cup assembly, the vertical linear module is mounted on a slider of the horizontal linear module, and the suction cup assembly is mounted on the slider of the vertical linear module.

[0014] Furthermore, a plurality of material receiving boxes are provided on one side of the workbench close to the silo module.

[0015] Furthermore, a polarizer carrying jig is provided on the slider of the jig moving module, the polarizer carrying jig is open on both sides, a light source is provided on its inner bottom surface, and its upper surface is a light-transmitting plate, and adsorption holes are evenly provided on the four edges of the light-transmitting plate.

[0016] Furthermore, the filter switching module includes a mounting frame with an opening at the lower end, a filter plate, a filter, a screw pair and a slide rail, the screw of the screw pair is installed on one side edge of the mounting frame, the screw nut of the screw pair is connected to the filter plate, the slide rail is installed on the other side edge of the mounting frame, the slider of the slide rail is connected to the filter plate, and filters of several specifications are arranged side by side on the filter plate; a through hole is opened at the upper end of the mounting frame, and the first camera assembly is directly above the through hole.

[0017] Furthermore, the hollow rotating table includes a mounting plate, a jig frame and a rotating motor, the rotating motor is connected to the bottom surface of the mounting plate, and its output shaft passes through the mounting plate and is connected to the bottom of the jig frame, the jig frame has a jig support plate, the cross-section of the jig support plate is an octagon, all internal angles of the octagon are 135°, and an adsorption jig is installed in the middle position of the jig support plate; the adsorption jig includes a first adsorption jig and a second adsorption jig, both of which have square cross-sections, the length of the second adsorption jig is smaller than the length of the first adsorption jig, and the distance between the second adsorption jig and the first adsorption jig is smaller than the length of the second adsorption jig.

[0018] Furthermore, the bright spot detection unit also includes a bright spot detection frame, on which a wind knife, a re-judgment camera and a warpage detection camera are sequentially mounted.

[0019] Furthermore, the material unloading unit includes a material unloading rack and four material receiving boxes located on the material unloading rack, and an inclined supporting plate is provided in the material receiving box.

[0020] The beneficial effects of the present invention are:

[0021] The bright spot detection device of the polarizer of the present invention is reasonably designed and easy to operate, and realizes the full-automatic detection function of the bright spot film product;

[0022] The present invention can meet the detection of multiple products by automatically selecting an appropriate filter, and the operation is convenient;

[0023] The filter inspection unit of the present invention uses the filter group and the first camera component to automatically and roughly locate the bright spot position in sequence at a long distance to determine the best matching filter, then uses the first camera component to detect the adsorption of the product, and finally uses the filter and the second camera component of the optical positioning point recognition unit to achieve accurate positioning and automatic adaptation detection of the bright spot position of the product at a close distance;

[0024] The present invention classifies the angles of the optical positioning points on the polarizer, simulates different angles, and divides the fixture support plate into multiple adsorption areas, thereby solving the adsorption problem when the same fixture sheet is placed at multiple angles; by setting a first adsorption fixture and a second adsorption fixture, the imaging position is adsorbed to ensure the flatness of the imaging position, thereby solving the problem of unstable imaging detection of the optical positioning point caused by warping of the polarizer sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the external structure of the bright spot detection device of the polarizer of the present invention.

[0027] Figure 2 yes Figure 1Schematic diagram of the structure without the outer cover.

[0028] Figure 3 yes Figure 2 Top view of the .

[0029] Figure 4 It is a structural schematic diagram of a silo module in the bright spot detection device of a polarizer of the present invention.

[0030] Figure 5 It is a structural schematic diagram of a moving module in the bright spot detection device of a polarizer of the present invention.

[0031] Figure 6 yes Figure 5 Schematic diagram in the other direction.

[0032] Figure 7 It is a structural schematic diagram of a filter inspection unit in a bright spot detection device for a polarizer of the present invention.

[0033] Figure 8 yes Figure 7 Top view of the .

[0034] Fig. 9 It is a structural schematic diagram of the adsorption fixture moving module in the bright spot detection device of the polarizer of the present invention.

[0035] Fig.10 It is a structural schematic diagram of an adsorption fixture in a bright spot detection device for a polarizer of the present invention.

[0036] Fig.11 yes Fig.10 Schematic diagram of the structure in another direction.

[0037] Fig.12 yes Fig.10 Rear view of the .

[0038] Fig.13 yes Fig.10 Right view of .

[0039] Fig.14 yes Fig.10 Schematic diagram of the structure of the first adsorption fixture.

[0040] Fig.15 yes Fig.10 Schematic diagram of the structure of the second adsorption fixture.

[0041] Fig.16 yes Fig.10 Schematic diagram of the structure on the back of the middle fixture support plate.

[0042] Fig.17 It is a structural schematic diagram of a bright spot detection frame in the bright spot detection device of the polarizer of the present invention.

[0043] Fig.18 It is a structural schematic diagram of a material unloading unit in the bright spot detection device of the polarizer of the present invention.

[0044] In the figure: 1. workbench; 2. outer cover;

[0045] 3. Loading unit;

[0046] 31. Moving module; 311. Horizontal linear module; 312. Vertical linear module; 313. Suction cup assembly;

[0047] 32. Bin module; 321. Carrying plate; 3211. X-axis slot; 3212. Y-axis slot; 322. Electric cylinder; 323. Bottom plate; 324. X-axis linear module; 325. Intermediate mounting plate; 326. Y-axis linear module; 327. First clamping plate; 328. Second clamping plate; 329. Guide rod; 3210. Thickness sensor assembly; 32101. Sensor bracket; 32102. Thickness sensor;

[0048] 33. Multiple receiving boxes;

[0049] 4. Filter inspection unit; 41. Jig moving module; 42. Filter switching module; 421. Mounting frame; 422. Filter plate; 423. Filter; 424. Screw pair; 425. Slide rail; 43. First camera assembly; 44. Polarizer carrying jig; 441. Light source; 442. Translucent plate;

[0050] 5. Optical positioning point recognition unit; 51. Second camera assembly;

[0051] 6. Bright spot detection unit; 61. Adsorption fixture; 611. First adsorption fixture; 6111. First mounting edge; 6112. First interface; 612. Second adsorption fixture; 6121. Second mounting edge; 6122. Second interface; 613. Cover plate; 614. Wiring trough; 615. Bottom cover; 62. Adsorption fixture moving module 6; 63. Re-judgment camera; 64. Warp detection camera; 65. Hollow rotating table; 651. Mounting plate; 6511. Support frame; 6512. Negative pressure display table; 652. Fixture frame; 65201. Base; 65202. Pillar; 65211. Mounting hole; 65212. Adsorption area; 653. Rotating motor; 6521. Fixture support plate; 66. Bright spot detection frame; 67. Wind knife;

[0052] 7. unloading unit; 71. unloading rack; 72. material receiving box; 721. material supporting plate. DETAILED DESCRIPTION

[0053] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] like Figure 1 to Figure 3 As shown, a bright spot detection device for polarizer includes a workbench 1 and an outer cover 2 arranged on the workbench 1. The workbench 1 is provided with a loading unit 3, a filter inspection unit 4, an optical positioning point recognition unit 5, a bright spot detection unit 6 and a unloading unit 7 in sequence. The outer cover is composed of an upper outer cover and a lower outer cover, and the upper outer cover adopts a sheet metal + transparent PC board method to ensure that the working status of the equipment can be observed during operation. The frame is connected to the bottom of the workbench 1, and a welded steel frame is adopted to ensure that the equipment is firm and stable.

[0057] Among them, the loading unit 3 includes a moving module 31 and a silo module 32. The silo module 32 is set at the loading position at one end of the moving module 31. The moving module 31 absorbs the polarizer from the silo module 32 and moves it to the filter inspection unit 4. A plurality of receiving boxes 33 are provided on the side of the workbench 1 close to the silo module 32. The bright spot detection unit 6 includes a manipulator (not shown in the figure), an adsorption fixture 61, an adsorption fixture moving module 62, a re-judgment camera 63 and a warpage detection camera 64. The adsorption fixture moving module 62 drives the adsorption fixture 61 to move to the re-judgment camera 63 and the warpage detection camera 64 in sequence for shooting.

[0058] like Figure 4As shown, the silo module 32 includes a carrier plate 321, a centering component, an electric cylinder 322 and a bottom plate 323. The carrier plate 321 is provided with a pair of X-axis grooves 3211 and a pair of Y-axis grooves 3212. The centering component includes a pair of X-axis linear modules 324, an intermediate mounting plate 325 and a pair of Y-axis linear modules 326. The Y-axis linear module 326 is mounted on the intermediate mounting plate 325. The slider of the Y-axis linear module 326 is connected to the first clamping plate 327 through a first connecting plate. The first clamping plate 327 is located in the Y-axial groove 3212. The two Y-axis linear modules 326 respectively drive the two first clamping plates 327 to move toward each other. The X-axis linear module 324 is mounted on the bottom plate 323. The slider of the X-axis linear module 324 is connected to the second clamping plate through a second connecting plate. The first clamping plate 328 and the second clamping plate 328 pass through the intermediate mounting plate 325 and extend into the X-axial groove 3211. The two X-axis linear modules 324 drive the two second clamping plates 328 to move toward each other respectively. A guide rod 329 is provided on each of the four corners of the bearing plate 321. The guide rod 329 passes through the intermediate mounting plate 325 and the base plate 323 in sequence. The electric cylinder 322 is installed on the bottom surface of the base plate 323. The push rod of the electric cylinder 322 passes through the intermediate mounting plate 325 and is connected to the bottom surface of the bearing plate 321. It should be noted that the middle of the bearing plate 321 is not connected to the X-axial groove 3211 and the Y-axial groove 3212. Linear bearings are installed between the bearing plate 321 and the guide rod 329, and between the base plate 323 and the guide rod 329 to ensure the stability and smoothness of the lifting movement of the bearing plate 321.

[0059] The electric cylinder 322 drives the supporting plate 321 to perform lifting movements according to the number of products. The two X-axis linear modules 324 respectively control the second clamping plate 328 to perform symmetrical movement in the X-axis direction to adapt to the length dimension of the product. The two Y-axis linear modules 326 respectively control the first clamping plate 327 to perform symmetrical movement in the Y-axis direction to adapt to the width dimension of the product.

[0060] In addition, thickness sensor components 3210 are provided on both sides of the silo module 32. The thickness sensor components 3210 are composed of a sensor bracket 32101 and a thickness sensor 32102 installed on the sensor bracket 32101. The thickness of the product is detected by the thickness sensor 32102 to determine whether the moving module 31 has sucked a plurality of products.

[0061] like Figure 5 and Figure 6As shown, the moving module 31 includes a horizontal linear module 311, a vertical linear module 312 and a suction cup assembly 313. The vertical linear module 312 is mounted on the slider of the horizontal linear module 311, and the suction cup assembly 313 is mounted on the slider of the vertical linear module 312. The horizontal linear module 311 drives the suction cup assembly 313 to move to the loading position, and the slider of the vertical linear module 312 moves downward, driving the suction cup of the suction cup assembly 313 to absorb the product. At the same time, the thickness sensor 32102 detects the thickness of the product. If multiple products are absorbed, the slider of the vertical linear module 312 moves upward, and the horizontal linear module 311 moves to the multiple-sheet receiving box 33. The slider of the vertical linear module 312 moves upward and downward, so that the suction cup assembly 313 drives the product to shake up and down, so that multiple products fall into the multiple-sheet receiving box 33, and the horizontal linear module 311 moves to the unloading position.

[0062] like Figure 7 and Figure 8 As shown, the filter inspection unit 4 includes a jig moving module 41, a filter switching module 42 and a first camera assembly 43. A polarizer carrying jig 44 is provided on the slider of the jig moving module 41. The polarizer carrying jig 44 has openings on both sides, a light source 441 is provided on the inner bottom surface, and a light-transmitting plate 442 is provided on the upper surface. Adsorption holes are evenly provided on the four edges of the light-transmitting plate 442. The filter switching module 42 includes a mounting frame 421 with an opening at the lower end, a filter plate 422, a filter 423, a screw pair 424 and a slide rail 425. The screw of the screw pair 424 is installed on one side edge of the mounting frame 424, the screw nut of the screw pair 424 is connected to the filter plate 422, the slide rail 425 is installed on the other side edge of the mounting frame 421, the slider of the slide rail 425 is connected to the filter plate 422, and filters 423 of several specifications are arranged side by side on the filter plate 422; a through hole is opened at the upper end of the mounting frame 421, and the first camera assembly 43 is located directly above the through hole. The filter 423 of this embodiment is provided with 4 currently commonly used specifications.

[0063] The fixture moving module 41 drives the polarizer carrying fixture 44 to the unloading position of the moving module 31, and the suction cup assembly 313 places the product on the light-transmitting plate 442 of the polarizer carrying fixture 44. The light source 441 illuminates the light-transmitting plate 442, and the screw of the screw pair 424 of the filter switching module 42 is driven to rotate by a motor (not shown in the figure), and the screw nut drives the filter plate 422 to move. When each filter 423 moves to the bottom of the first camera assembly 43, the camera of the first camera assembly 43 takes a picture, and the host computer checks the corresponding effect of the filter 423 and the product, finds the most suitable filter 423, and the screw stops moving.

[0064] The optical positioning point recognition unit 5 has a second camera assembly 51, which is installed on one side of the first camera assembly 43. The fixture moving module 41 drives the polarizer carrying fixture 44 to move to the bottom of the second camera assembly 41, and the camera of the second camera assembly 51 takes another photo of the product to determine the position of the optical positioning point on the product.

[0065] like Fig. 9 As shown, the lower part of the adsorption fixture 61 has a hollow rotating platform 65, and the hollow rotating platform 65 is arranged on the adsorption fixture moving module 62; Figure 10 to Figure 13 As shown, the hollow rotating table 65 includes a mounting plate 651, a jig frame 652 and a rotating motor 653, the rotating motor 653 is connected to the bottom surface of the mounting plate 651, and its output shaft passes through the mounting plate 651 and is connected to the bottom of the jig frame 652, the jig frame 652 has a jig support plate 6521, the cross-section of the jig support plate 6521 is octagonal, all the internal angles of the octagon are 135°, and an adsorption jig 61 is installed in the middle position of the jig support plate 6521; the adsorption jig 61 includes a first adsorption jig 611 and a second adsorption jig 612, both of which have square cross-sections, the length of the second adsorption jig 612 is smaller than the length of the first adsorption jig 611, and the distance between the second adsorption jig 612 and the first adsorption jig 611 is smaller than the length of the second adsorption jig 612.

[0066] A support frame 6511 is connected to one edge of the mounting plate 651, and a negative pressure display meter 6512 is arranged on the support frame 6511. The fixture frame 652 includes a base 65201 and four pillars 65202 located on the base 65201, and the upper ends of the four pillars 65202 are connected to the fixture support plate 6521.

[0067] After a large number of experiments, it was found that the fixture support plate 6521 is set to the above structure, which can ensure that the polarizer can be adsorbed by the adsorption fixture 61 at any angle. Then, the fixture frame 652 is rotated to the imaging position by the rotating motor 653, and the optical positioning point on the polarizer can be detected. The length of the second adsorption fixture 612 and the length of the first adsorption fixture 611 and the gap between them are obtained through repeated tests, and the first adsorption fixture 611 and / or the second adsorption fixture 612 can correspond to the optical positioning point on the polarizer when any polarizer is placed on it.

[0068] like Fig.14 As shown, a square through hole is opened in the middle of the first adsorption fixture 611, first mounting edges 6111 are provided on both sides of the first adsorption fixture 611, first interfaces 6112 for connecting the negative pressure tube are opened on both end surfaces of the first adsorption fixture 611, and adsorption holes are evenly opened on the surface of the first adsorption fixture 611.

[0069] like Fig.15As shown, a square through hole is opened in the middle of the second adsorption fixture 612, second mounting edges 6121 are provided on both sides of the second adsorption fixture 612, second interfaces 6122 for connecting the negative pressure tube are opened on both end surfaces of the second adsorption fixture 612, and adsorption holes are evenly opened on the surface of the second adsorption fixture 612.

[0070] like Fig.11 and 16 As shown, the middle of the fixture support plate 6521 is provided with a mounting hole 65211 for the first adsorption fixture 611 and the second adsorption fixture 612, and a cover plate 613 is connected below each of the two mounting holes 65211, and a certain gap is left between the two cover plates 613 to form a wiring groove 614. The back of the fixture support plate 6521 is provided with a plurality of distribution grooves for negative pressure pipes, forming a plurality of adsorption areas 65212, and adsorption holes are evenly provided on the adsorption areas 65212, and a bottom cover 615 is installed. The bottom cover 615 is connected with a connector connected to the negative pressure pipe.

[0071] like Fig.17 As shown, the bright spot detection unit 6 also includes a bright spot detection frame 66, on which a wind knife 67, a re-judgment camera 63 and a warpage detection camera 64 are sequentially mounted. If the warpage detection camera 64 detects that the warped product is not adsorbed, the adsorption fixture moving module 62 drives the adsorption fixture 61 back to the bright spot detection frame 66, and the wind knife 67 assists in blowing the product flat for adsorption, and then the product is inspected by the re-judgment camera 63 and the warpage detection camera 64 in sequence.

[0072] like Fig.18 As shown, the unloading unit 7 includes a unloading rack 71 and four material receiving boxes 72 located on the unloading rack 71 , and an inclined supporting plate 721 is provided in the material receiving box 72 .

[0073] Specific working process:

[0074] The horizontal linear module 311 drives the suction cup assembly 313 to move to the loading position, and the slider of the vertical linear module 312 moves downward, driving the suction cup of the suction cup assembly 313 to suck the product. At the same time, the thickness sensor 32102 detects the thickness of the product. If multiple products are sucked, the slider of the vertical linear module 312 moves upward, and the horizontal linear module 311 moves to the multiple material receiving box 33. The slider of the vertical linear module 312 moves upward and downward, so that the suction cup assembly 313 drives the product to shake up and down, so that multiple products fall into the multiple material receiving box 33, and the horizontal linear module 311 moves to the unloading position.

[0075] The fixture moving module 41 drives the polarizer carrying fixture 44 to the unloading position of the moving module 31, and the suction cup assembly 313 places the product on the light-transmitting plate 442 of the polarizer carrying fixture 44. The light source 441 illuminates the light-transmitting plate 442, and the screw of the screw pair 424 of the filter switching module 42 is driven to rotate by a motor (not shown in the figure), and the screw nut drives the filter plate 422 to move. When each filter 423 moves to the bottom of the first camera assembly 43, the camera of the first camera assembly 43 takes a picture, and the host computer checks the corresponding effect of the filter 423 and the product, finds the most suitable filter 423, and the screw stops moving.

[0076] The fixture moving module 41 drives the polarizer carrying fixture 44 to move to the bottom of the second camera assembly 41, and the camera of the second camera assembly 51 takes another photo of the product to determine the position of the optical positioning point on the product.

[0077] The robot (the robot has an activity range of 600mm and is equipped with a laser ranging sensor) absorbs the product rotation angle, aligns the optical positioning point, and then transports it to the adsorption fixture 61 of the bright spot detection unit 6. The adsorption fixture moving module 62 drives the adsorption fixture 61 to move to the bright spot detection frame 66. The re-display camera 64 takes a photo to confirm the position and angle of the product and whether compensation of the X-axis, Y-axis and angle is required. If necessary, the adsorption fixture moving module 62 returns to the robot. After the robot absorbs, it rotates to adjust the compensation of the X-axis, Y-axis and angle (the robot accuracy is less than ±0.2°, and the transport suction cup on the robot is used to lower the product When the vacuum is broken at a distance of 2mm from the fixture, the angle can be guaranteed to be within ±3°). When it is placed on the adsorption fixture 61, if it is detected that the angle is too skew, the hollow rotating platform 65 will compensate for the angle, and then return to the re-display camera 64 to take pictures for confirmation; after confirmation, the adsorption fixture 61 moves to the bottom of the warpage detection camera 65 to confirm whether the bright spot detection camera 65 detects that the warped product is flat. If it exceeds ±0.5°, the adsorption fixture moving module 62 drives the adsorption fixture 61 back to the bright spot detection frame 66, and is assisted by the wind knife 67 to blow the product flat for adsorption, and then it is inspected by the re-judgment camera 63 and the warpage detection camera 64 in turn.

[0078] The adsorption fixture moving module 62 drives the adsorption fixture 61 back to the manipulator, and the manipulator grabs the product and moves it to the corresponding receiving box 72. There are 4 receiving boxes 72, namely, the bright spot box, the OK box, the suspected box and the spare box. The uniformity of the collected materials can be controlled at about 1mm, and the stacking height is 100mm.

[0079] The above description only describes the specific implementation mode of the present invention. Various examples do not limit the essential content of the present invention. After reading the description, ordinary technicians in the relevant technical field can modify or deform the specific implementation modes described above without departing from the essence and scope of the invention.

Claims

1. A bright spot detection device for a polarizer, comprising a workbench (1) and an outer cover (2) arranged on the workbench (1), characterized in that: The workbench (1) is provided with a loading unit (3), a filter inspection unit (4), an optical positioning point recognition unit (5), a bright spot detection unit (6) and a unloading unit (7) in sequence. The loading unit (3) comprises a transport module (31) and a silo module (32); the silo module (32) is arranged at a loading position at one end of the transport module (31); the transport module (31) absorbs the polarizer from the silo module (32) and moves it to the filter inspection unit (4); The filter inspection unit (4) comprises a jig moving module (41), a filter switching module (42) and a first camera assembly (43); the jig moving module (41) receives and carries the polarizer on the moving module (31); the filter switching module (42) is arranged above one end of the jig moving module (41) and is used to select a filter corresponding to the polarizer; and the first camera assembly (43) is installed above the filter switching module (42); The optical positioning point recognition unit (5) has a second camera assembly (51), and the second camera assembly (51) is installed on one side of the first camera assembly (43); The bright spot detection unit (6) comprises a manipulator, an adsorption jig (61), an adsorption jig moving module (62), a re-judgment camera (63) and a warpage detection camera (64); the manipulator absorbs the polarizer on the jig moving module (41) and moves it to the adsorption jig (61); the lower part of the adsorption jig (61) has a hollow rotating table (65); the hollow rotating table (65) is arranged on the adsorption jig moving module (62); the adsorption jig moving module (62) drives the adsorption jig (61) to move to the re-judgment camera (63) and the warpage detection camera (64) in sequence for shooting.

2. The bright spot detection device of the polarizer according to claim 1, characterized in that: The silo module (32) comprises a carrier plate (321), a centering component, an electric cylinder (322) and a base plate (323). The carrier plate (321) is provided with a pair of X-axis grooves (3211) and a pair of Y-axis grooves (3212). The centering component comprises a pair of X-axis linear modules (324), an intermediate mounting plate (325) and a pair of Y-axis linear modules (325). The Y-axis linear modules (325) are mounted on the intermediate mounting plate (325). The slider of the Y-axis linear module (325) is connected to the first clamping plate (327) via a first connecting plate. The first clamping plate (327) is located in the Y-axis groove (3212). The X-axis linear module (324) is mounted on the base plate (323). ), the slider of the X-axis linear module (324) is connected to the second clamping plate (328) through the second connecting plate, the second clamping plate (328) passes through the intermediate mounting plate (325) and extends into the X-axis axial groove (3211), and a guide rod (329) is provided on each of the four corners of the bearing plate (321), and the guide rod (329) passes through the intermediate mounting plate (325) and the bottom plate (323) in sequence, the electric cylinder (622) is installed on the bottom surface of the bottom plate (323), and the push rod of the electric cylinder (322) passes through the intermediate mounting plate (325) and is connected to the bottom surface of the bearing plate (321); linear bearings are installed between the bearing plate (321) and the guide rod (329), and between the bottom plate (323) and the guide rod (329).

3. The bright spot detection device of the polarizer according to claim 1, characterized in that: Thickness sensing components (3210) are provided on both sides of the silo module (32), and the thickness sensing components (3210) are composed of a sensor bracket (32101) and a thickness sensor (32102) installed on the sensor bracket (32101).

4. The bright spot detection device of the polarizer according to claim 1, characterized in that: The moving module (31) comprises a horizontal linear module (311), a vertical linear module (312) and a suction cup assembly (313); the vertical linear module (312) is mounted on a slider of the horizontal linear module (311), and the suction cup assembly (313) is mounted on a slider of the vertical linear module (312).

5. The bright spot detection device of the polarizer according to claim 1, characterized in that: A plurality of material receiving boxes (33) are provided on one side of the workbench (1) close to the material bin module (32).

6. The bright spot detection device of the polarizer according to claim 1, characterized in that: A polarizer carrying jig (44) is provided on a slider of the jig moving module (41); the polarizer carrying jig (44) has openings on both sides, a light source (441) is provided on its inner bottom surface, and a light-transmitting plate (442) is provided on its upper surface; adsorption holes are evenly provided on the four edges of the light-transmitting plate (442).

7. The bright spot detection device of the polarizer according to claim 1, characterized in that: The filter switching module (42) comprises a mounting frame (421) with an opening at the lower end, a filter plate (422), a filter (423), a screw rod pair (424) and a slide rail (425), wherein the screw rod of the screw rod pair (424) is mounted on one side edge of the mounting frame (421), the screw rod nut of the screw rod pair (424) is connected to the filter plate (422), the slide rail (425) is mounted on the other side edge of the mounting frame (421), the slider of the slide rail (425) is connected to the filter plate (422), and filters (423) of several specifications are arranged side by side on the filter plate (422); a through hole is opened at the upper end of the mounting frame (421), and the first camera assembly (43) is located directly above the through hole.

8. The bright spot detection device of the polarizer according to claim 1, characterized in that: The hollow rotating table (65) comprises a mounting plate (651), a fixture frame (652) and a rotating motor (653); the rotating motor (653) is connected to the bottom surface of the mounting plate (651); an output shaft thereof passes through the mounting plate (651) and is connected to the bottom of the fixture frame (652); the fixture frame (652) comprises a fixture support plate (6521); the cross section of the fixture support plate (6521) is octagonal, and all internal angles of the octagon are 135°; an adsorption fixture (61) is installed in the middle of the fixture support plate (6521); the adsorption fixture (61) comprises a first adsorption fixture (611) and a second adsorption fixture (612), both of which have square cross sections; the length of the second adsorption fixture (612) is smaller than the length of the first adsorption fixture (611), and the distance between the second adsorption fixture (612) and the first adsorption fixture (611) is smaller than the length of the second adsorption fixture (612).

9. The bright spot detection device of the polarizer according to claim 1, characterized in that: The bright spot detection unit (6) further comprises a bright spot detection frame (66), on which a wind knife (67), a re-judgment camera (63) and a warpage detection camera (64) are sequentially mounted.

10. The bright spot detection device of the polarizer according to claim 1, characterized in that: The material unloading unit (7) comprises a material unloading rack (71) and four material receiving boxes (72) located on the material unloading rack (71), wherein an inclined material supporting plate (721) is provided in the material receiving box (72).

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