Brightness spot detection equipment for polaroid

Abstract

The utility model relates to the technical field of film bright spot product detection, in particular to a bright spot detection device of a polaroid, which comprises a working table, a feeding unit, a filter disc inspection unit, an optical positioning point identification unit, a bright spot detection unit and a discharging unit are sequentially arranged on the working table, 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] This utility model relates to the field of thin film spot testing technology, and in particular to a spot testing device for polarizers. Background Technology

[0002] In the current market, there are very few thin-film dot products, so existing visual inspection equipment cannot be used to inspect such products. Many of them are directly judged as NG products during inspection. At this time, manual inspection is required to re-inspect each one with precision instruments, which wastes a lot of product and labor costs. Furthermore, the existing manual inspection cannot completely and efficiently identify whether there are defects in each dot position, resulting in some defective products being misjudged and flowing into the customer's hands.

[0003] Manual testing of the glow point of products is quite troublesome, as it requires adaptation to different filter sheets. Furthermore, even for the same type of product, different filter sheets are needed due to variations in glow point size, resulting in extremely low production efficiency.

[0004] In addition, existing adsorption fixtures cannot meet the compatibility of multiple products. The center of the test needs to be adjusted according to the position of the product's spot. Furthermore, warped products cannot be adsorbed and flattened due to uneven airflow, which leads to visual inspection failure and misjudgment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a device for detecting the glow point of a polarizer.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a polarizer glow point detection device, including a worktable and an outer cover on the worktable, wherein a feeding unit, a filter inspection unit, an optical positioning point identification unit, a glow point detection unit and a unloading unit are sequentially arranged on the worktable.

[0007] The feeding unit includes a transfer module and a hopper module. The hopper module is located at the feeding position at one end of the transfer module. The transfer module picks up the polarizer from the hopper module and moves it to the filter inspection unit.

[0008] The filter inspection unit includes a fixture moving module, a filter switching module, and a first camera assembly. The fixture moving module receives and carries the polarizer on the transfer module. The filter switching module is located above one end of the fixture moving module and is used to select the filter corresponding to the polarizer. 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 spot detection unit includes a robotic arm, an adsorption fixture, an adsorption fixture moving module, a re-judgment camera, and a warpage detection camera. The robotic arm picks up the polarizer from the fixture moving module and transports it to the adsorption fixture. The lower part of the adsorption fixture has a hollow rotating stage, which is set on the adsorption fixture moving module. The adsorption fixture moving module drives the adsorption fixture to move sequentially to the re-judgment camera and the warpage detection camera for imaging.

[0011] Furthermore, the hopper module includes a support plate, a centering component, an electric cylinder, and a base plate. The support plate has a pair of X-axis grooves and a pair of Y-axis grooves. The centering component includes a pair of X-axis linear modules, a central mounting plate, and a pair of Y-axis linear modules. The Y-axis linear modules are mounted on the central mounting plate, and the slider of the Y-axis linear modules is connected to a first clamping plate via a first connecting plate. The first clamping plate is located within the Y-axis groove. The X-axis linear modules are mounted on the base plate, and the slider of the X-axis linear modules is connected to a second clamping plate via a second connecting plate. The second clamping plate extends through the central mounting plate into the X-axis groove. A guide rod is provided at each of the four corners of the support plate. The guide rods pass through the central mounting plate and the base plate in sequence. The electric cylinder is mounted on the bottom surface of the base plate, and the push rod of the electric cylinder passes through the central mounting plate and connects to the bottom surface of the support plate. Linear bearings are installed between the support plate and the guide rods, and between the base plate and the guide rods.

[0012] Furthermore, the hopper module is provided with thickness sensing components on both sides, and the thickness sensing components consist of a sensor bracket and a thickness sensor mounted on the sensor bracket.

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

[0014] Furthermore, multiple receiving boxes are provided on the side of the workbench near the hopper module.

[0015] Furthermore, the slider of the fixture moving module is provided with a polarizing film carrying fixture. The polarizing film carrying fixture has openings on both sides, a light source is provided on its inner bottom surface, and a light-transmitting plate is provided on its upper surface. Adsorption holes are evenly opened at the four periphery of the light-transmitting plate.

[0016] Furthermore, the filter switching module includes a mounting bracket with an opening at the lower end, a filter plate, filter plates, a lead screw assembly, and a slide rail. The lead screw of the lead screw assembly is installed on one side edge of the mounting bracket, and the lead screw nut of the lead screw assembly is connected to the filter plate. The slide rail is installed on the other side edge of the mounting bracket, and the slider of the slide rail is connected to the filter plate. Several filter plates of various specifications are arranged side by side on the filter plate. The upper end of the mounting bracket has a through hole, and the first camera assembly is directly above the through hole.

[0017] Furthermore, the hollow rotary table includes a mounting plate, a fixture frame, and a rotary motor. The rotary motor is connected to the bottom surface of the mounting plate, and its output shaft passes through the mounting plate and connects to the bottom of the fixture frame. The fixture frame has a fixture support plate with an octagonal cross-section. All interior angles of the octagon are 135°. An adsorption fixture is installed in the middle of the fixture support plate. The adsorption fixture includes a first adsorption fixture and a second adsorption fixture, both with square cross-sections. The length of the second adsorption fixture is less than the length of the first adsorption fixture, and the distance between the second adsorption fixture and the first adsorption fixture is less than the length of the second adsorption fixture.

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

[0019] Furthermore, the unloading unit includes an unloading rack and four receiving boxes located on the unloading rack, and the receiving boxes are provided with inclined support plates.

[0020] The beneficial effects of this utility model are:

[0021] The polarizer spot detection equipment of this utility model is reasonably designed and easy to operate, realizing the fully automatic detection function of polarizer film products.

[0022] This invention can meet the testing needs of multiple products by automatically selecting the appropriate filter, and is easy to operate;

[0023] The filter inspection unit of this utility model automatically and coarsely locates the position of the glow point by the filter group and the first camera assembly at a distance to determine the best matching filter. Then, it detects the adsorption of the product by the first camera assembly. Finally, it achieves precise positioning and automatic matching detection of the glow point position of the product by the second camera assembly of the filter and the optical positioning point recognition unit at close range.

[0024] This invention classifies the angles of optical positioning points on the polarizer and simulates different angles to divide the fixture support plate into multiple adsorption areas, thus 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, thus solving the problem of unstable imaging detection of optical positioning points caused by warping of the polarizer sheet. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1This is a schematic diagram of the external structure of the polarizer spot detection device of this utility model.

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure without the outer cover.

[0029] Figure 3 yes Figure 2 Top view.

[0030] Figure 4 This is a schematic diagram of the hopper module in the polarizer spot detection device of this utility model.

[0031] Figure 5 This is a schematic diagram of the transfer module in the polarizer spot detection device of this utility model.

[0032] Figure 6 yes Figure 5 A diagram from another direction.

[0033] Figure 7 This is a schematic diagram of the filter inspection unit in the polarizer spot detection device of this utility model.

[0034] Figure 8 yes Figure 7 Top view.

[0035] Figure 9 This is a schematic diagram of the adsorption fixture moving module in the polarizer spot detection device of this utility model.

[0036] Figure 10 This is a schematic diagram of the adsorption fixture in the polarizer spot detection device of this utility model.

[0037] Figure 11 yes Figure 10 A schematic diagram of the structure from another direction.

[0038] Figure 12 yes Figure 10 Rear view diagram.

[0039] Figure 13 yes Figure 10 The right view.

[0040] Figure 14 yes Figure 10 A schematic diagram of the structure of the first adsorption fixture.

[0041] Figure 15 yes Figure 10 A schematic diagram of the structure of the second adsorption fixture.

[0042] Figure 16 yes Figure 10 A schematic diagram of the structure on the back of the support plate of the central fixture.

[0043] Figure 17 This is a schematic diagram of the structure of the spot detection frame in the spot detection equipment for polarizers of this utility model.

[0044] Figure 18 This is a schematic diagram of the feeding unit in the polarizer spot detection equipment of this utility model.

[0045] In the diagram: 1. Workbench; 2. Outer cover;

[0046] 3. Feeding unit;

[0047] 31. Transfer module; 311. Horizontal linear module; 312. Vertical linear module; 313. Suction cup assembly;

[0048] 32. Hopper module; 321. Bearing plate; 3211. X-axis groove; 3212. Y-axis groove; 322. Electric cylinder; 323. Base 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 sensing component; 32101. Sensor bracket; 32102. Thickness sensor;

[0049] 33. Multiple receiving boxes;

[0050] 4. Filter inspection unit; 41. Fixture moving module; 42. Filter switching module; 421. Mounting bracket; 422. Filter plate; 423. Filter; 424. Lead screw pair; 425. Slide rail; 43. First camera assembly; 44. Polarizing film support fixture; 441. Light source; 442. Light transmission plate;

[0051] 5. Optical positioning point recognition unit; 51. Second camera assembly;

[0052] 6. 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. Warpage detection camera; 65. Hollow rotation 651, Mounting plate; 6511, Support frame; 6512, Negative pressure display meter; 652, Fixture frame; 65201, Base; 65202, Support column; 65211, Mounting hole; 65212, Adsorption area; 653, Rotary motor; 6521, Fixture support plate; 66, Spot detection frame; 67, Air knife; 7, Unloading unit; 71, Unloading rack; 72, Receiving box; 721, Material support plate. Detailed Implementation

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

[0054] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0056] like Figures 1-3 As shown, a polarizer spot detection device includes a worktable 1 and an outer cover 2 covering the worktable 1. The worktable 1 is sequentially equipped with a feeding unit 3, a filter inspection unit 4, an optical positioning point identification unit 5, a spot detection unit 6, and a unloading unit 7. The outer cover consists of an upper outer cover and a lower outer cover. The upper outer cover is made of sheet metal and transparent PC board to ensure that the working status of the equipment can be observed during operation. A frame connected below the worktable 1 is constructed using a welded steel frame to ensure the equipment is sturdy and stable.

[0057] The feeding unit 3 includes a transfer module 31 and a hopper module 32. The hopper module 32 is located at the feeding position at one end of the transfer module 31. The transfer module 31 picks up the polarizer from the hopper module 32 and moves it to the filter inspection unit 4. Multiple receiving boxes 33 are provided on the side of the workbench 1 near the hopper module 32. The spot detection unit 6 includes a robotic arm (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 moves the adsorption fixture 61 sequentially to the re-judgment camera 63 and the warpage detection camera 64 for imaging.

[0058] like Figure 4 As shown, the hopper module 32 includes a support plate 321, a centering component, an electric cylinder 322, and a base plate 323. The support plate 321 has 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 modules 326 are 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-axis grooves 3212. The two Y-axis linear modules 326 respectively drive the two first clamping plates 327 to move towards each other. The X-axis linear modules 324 are mounted on the base plate 323. The slider of the X-axis linear module 324 is connected to the second clamping plate through a second connecting plate. Plate 328, the second clamping plate 328 passes through the intermediate mounting plate 325 and extends into the X-axis groove 3211. Two X-axis linear modules 324 drive the two second clamping plates 328 to move towards each other. Each of the four corners of the bearing plate 321 is provided with a guide rod 329, which 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 connects 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-axis groove 3211 and the Y-axis 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] Electric cylinder 322 drives the support plate 321 to move up and down according to the quantity of products. Two X-axis linear modules 324 each control the second clamping plate 328 to move symmetrically in the X-axis direction to adapt to the length of the products. Two Y-axis linear modules 326 each control the first clamping plate 327 to move symmetrically in the Y-axis direction to adapt to the width of the products.

[0060] In addition, thickness sensing components 3210 are provided on both sides of the hopper module 32. The thickness sensing components 3210 consist of a sensor bracket 32101 and a thickness sensor 32102 mounted on the sensor bracket 32101. The thickness sensor 32102 detects the thickness of the product to determine whether the transfer module 31 has picked up multiple products.

[0061] like Figure 5 and Figure 6 As shown, the transfer 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 the loading position, and the slider of the vertical linear module 312 moves downward, causing the suction cup of the suction cup assembly 313 to pick up the product. At the same time, the thickness sensor 32102 detects the thickness of the product. If multiple products are picked up, the slider of the vertical linear module 312 moves upward, and the horizontal linear module 311 moves to the multiple receiving box 33. The slider of the vertical linear module 312 moves up and down, causing the suction cup assembly 313 to shake the product up and down, causing multiple products to fall into the multiple receiving box 33. The horizontal linear module 311 then moves to the unloading position.

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

[0063] The fixture moving module 41 drives the polarizer carrying fixture 44 to the unloading position of the transfer module 31. 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. The lead screw of the lead screw pair 424 of the filter switching module 42 is driven to rotate by a motor (not shown in the figure). The lead screw nut drives the filter plate 422 to move. When each type of filter 423 moves to below the first camera assembly 43, the camera of the first camera assembly 43 takes a picture. The host computer checks the corresponding effect of the filter 423 and the product, finds the most suitable filter 423, and the lead screw stops moving.

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

[0065] like Figure 9 As shown, the lower part of the adsorption fixture 61 has a hollow rotating stage 65, which is mounted on the adsorption fixture moving module 62; Figures 10-13 As shown, the hollow rotary table 65 includes a mounting plate 651, a fixture frame 652, and a rotary motor 653. The rotary 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 fixture frame 652. The fixture frame 652 has a fixture support plate 6521, the cross-section of which is octagonal, and all interior 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 includes 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 less 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 less than the length of the second adsorption fixture 612.

[0066] A support frame 6511 is connected to one side of the mounting plate 651, and a negative pressure display meter 6512 is provided on the support frame 6511. The jig 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 jig support plate 6521.

[0067] Extensive experiments revealed that the fixture support plate 6521, configured as described above, ensures that the polarizer can be adsorbed by the adsorption fixture 61 at any angle. By rotating the fixture frame 652 to the imaging position using the rotary motor 653, the optical positioning point on the polarizer can be detected. The lengths of the second adsorption fixture 612 and the first adsorption fixture 611, as well as the gap between them, were determined through repeated experiments to ensure that any polarizer can be placed on the first adsorption fixture 611 and / or the second adsorption fixture 612 correspond to the optical positioning point on the polarizer.

[0068] like Figure 14 As shown, the first adsorption fixture 611 has a square through hole in the middle, a first mounting edge 6111 on both sides, a first interface 6112 for connecting a negative pressure pipe on both ends, and adsorption holes are uniformly formed on the surface of the first adsorption fixture 611.

[0069] like Figure 15 As shown, the second adsorption fixture 612 has a square through hole in the middle, a second mounting edge 6121 on both sides, a second interface 6122 for connecting negative pressure pipes on both ends, and adsorption holes are uniformly formed on the surface of the second adsorption fixture 612.

[0070] like Figure 11 and 16 As shown, the fixture support plate 6521 has mounting holes 65211 in the middle for the first adsorption fixture 611 and the second adsorption fixture 612. A cover plate 613 is connected below each of the two mounting holes 65211, and the two cover plates 613 have a certain gap to form a wiring groove 614. The back of the fixture support plate 6521 has several distribution grooves for negative pressure pipes, forming several adsorption areas 65212. Adsorption holes are evenly distributed on each adsorption area 65212, and a bottom cover 615 is installed on each area. A connector for connecting to the negative pressure pipes is connected to the bottom cover 615.

[0071] like Figure 17 As shown, the spot detection unit 6 also includes a spot detection frame 66, on which an air knife 67, a re-judgment camera 63, and a warpage detection camera 64 are sequentially mounted. If the warpage detection camera 64 detects that a warped product has not been adsorbed, the adsorption fixture moving module 62 moves the adsorption fixture 61 back to the front of the spot detection frame 66. With the assistance of the air knife 67, the product is flattened for adsorption, and then sequentially passes through the re-judgment camera 63 and the warpage detection camera 64 for detection.

[0072] like Figure 18 As shown, the unloading unit 7 includes an unloading rack 71 and four receiving boxes 72 located on the unloading rack 71. Each receiving box 72 is provided with an inclined support plate 721.

[0073] Specific work process:

[0074] The horizontal linear module 311 drives the suction cup assembly 313 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 pick up the product. At the same time, the thickness sensor 32102 detects the thickness of the product. If multiple products are picked up, the slider of the vertical linear module 312 moves upward, and the horizontal linear module 311 moves to the multiple receiving box 33. The slider of the vertical linear module 312 moves up and down, causing the suction cup assembly 313 to shake the product up and down, causing multiple products to fall into the multiple receiving box 33. 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 transfer module 31. 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. The lead screw of the lead screw pair 424 of the filter switching module 42 is driven to rotate by a motor (not shown in the figure). The lead screw nut drives the filter plate 422 to move. When each type of filter 423 moves to below the first camera assembly 43, the camera of the first camera assembly 43 takes a picture. The host computer checks the corresponding effect of the filter 423 and the product, finds the most suitable filter 423, and the lead screw stops moving.

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

[0077] The robotic arm (with a 600mm range of motion and equipped with a laser rangefinder) picks up the product by its rotation angle, aligns the optical positioning point, and then transports it to the adsorption fixture 61 of the spot detection unit 6. The adsorption fixture moving module 62 moves the adsorption fixture 61 to the spot detection frame 66, where the replay camera 64 takes pictures to confirm the product's position and angle, and to determine if X-axis, Y-axis, and angle compensation is needed. If so, the adsorption fixture moving module 62 returns to the robotic arm, which then picks up the product and rotates to adjust and compensate for X-axis, Y-axis, and angle compensation (robotic arm accuracy < ±0.2°; the transport suction cup on the robotic arm lowers the product). When the vacuum is broken at a distance of 2mm from the fixture (the angle can be guaranteed to be within ±3°), the product is placed on the adsorption fixture 61. If the angle is found to be too large, the hollow rotating platform 65 will compensate for the angle and then return to the review camera 64 for photo confirmation. After confirmation, the adsorption fixture 61 is moved under the warpage detection camera 65 to confirm whether the warped product is flat. If it exceeds ±0.5°, the adsorption fixture moving module 62 will drive the adsorption fixture 61 back to the front of the spot detection frame 66. With the assistance of the air knife 67, the product is blown flat for adsorption and then passed through the re-judgment camera 63 and the warpage detection camera 64 for detection.

[0078] The adsorption fixture moving module 62 moves the adsorption fixture 61 back to the robotic arm. The robotic arm picks up the product and transports it to the corresponding receiving box 72. There are four receiving boxes 72: a spot receiving box, an OK receiving box, a suspected receiving box, and a spare receiving box. The uniformity of the receiving can be controlled to about 1mm, and the stacking height is 100mm.

[0079] The above description is only a specific embodiment of the present utility model. Various examples and illustrations do not constitute a limitation on the substantive content of the present utility model. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the description without departing from the essence and scope of the utility model.

Claims

1. A device for detecting the glow point of a polarizer, comprising a worktable (1) and an outer cover (2) covering the worktable (1), characterized in that: The workbench (1) is sequentially equipped with a feeding unit (3), a filter inspection unit (4), an optical positioning point identification unit (5), a spot detection unit (6), and a unloading unit (7). The feeding unit (3) includes a transfer module (31) and a hopper module (32). The hopper module (32) is located at the feeding position at one end of the transfer module (31). The transfer module (31) picks up the polarizer from the hopper module (32) and moves it to the filter inspection unit (4). The filter inspection unit (4) includes a fixture moving module (41), a filter switching module (42), and a first camera assembly (43). The fixture moving module (41) receives and carries the polarizer on the transfer module (31). The filter switching module (42) is located above one end of the fixture moving module (41) and is used to select the filter corresponding to the polarizer. 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), which is mounted on one side of the first camera assembly (43); The spot detection unit (6) includes a robotic arm, an adsorption fixture (61), an adsorption fixture moving module (62), a re-judgment camera (63), and a warpage detection camera (64). The robotic arm picks up the polarizer on the fixture moving module (41) and transports it to the adsorption fixture (61). The lower part of the adsorption fixture (61) has a hollow rotating stage (65). The hollow rotating stage (65) is set on the adsorption fixture moving module (62). The adsorption fixture moving module (62) drives the adsorption fixture (61) to move sequentially to the re-judgment camera (63) and the warpage detection camera (64) for shooting.

2. The polarizer spot detection device according to claim 1, characterized in that: The hopper module (32) includes a support plate (321), a centering component, an electric cylinder (322), and a base plate (323). The support plate (321) has 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 modules (326) are mounted on the intermediate mounting plate (325). The slider of the Y-axis linear module (326) is connected to a first clamping plate (327) through a first connecting plate. The first clamping plate (327) is located in the Y-axis grooves (3212). The X-axis linear modules (324) are mounted on the base plate (323). On the X-axis linear module (324), the slider 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 groove (3211). A guide rod (329) is provided at each of the four corners of the bearing plate (321). The guide rod (329) passes through the intermediate mounting plate (325) and the bottom plate (323) in sequence. The electric cylinder (322) is installed on the bottom surface of the bottom plate (323). The push rod of the electric cylinder (322) passes through the intermediate mounting plate (325) and connects 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 polarizer spot detection device according to claim 1, characterized in that: The hopper module (32) is provided with thickness sensing components (3210) on both sides. The thickness sensing components (3210) consist of a sensor bracket (32101) and a thickness sensor (32102) mounted on the sensor bracket (32101).

4. The polarizer spot detection device according to claim 1, characterized in that: The transfer 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).

5. The polarizer spot detection device according to claim 1, characterized in that: Multiple receiving boxes (33) are provided on the side of the workbench (1) near the hopper module (32).

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

7. The polarizer spot detection device according to claim 1, characterized in that: The filter switching module (42) includes a mounting bracket (421) with an opening at the lower end, a filter plate (422), a filter (423), a lead screw pair (424), and a slide rail (425). The lead screw of the lead screw pair (424) is installed on one side edge of the mounting bracket (421), and the lead screw nut of the lead screw pair (424) is connected to the filter plate (422). The slide rail (425) is installed on the other side edge of the mounting bracket (421), and the slider of the slide rail (425) is connected to the filter plate (422). Several filter plates (423) of various specifications are arranged side by side on the filter plate (422). The upper end of the mounting bracket (421) has a through hole, and the first camera assembly (43) is directly above the through hole.

8. The polarizer spot detection device according to claim 1, characterized in that: The hollow rotary table (65) includes a mounting plate (651), a fixture frame (652), and a rotary motor (653). The rotary 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 fixture frame (652). The fixture frame (652) has a fixture support plate (6521). The cross-section of the fixture support plate (6521) is octagonal, and all interior 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) includes 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 less 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 less than the length of the second adsorption fixture (612).

9. The polarizer spot detection device according to claim 1, characterized in that: The spot detection unit (6) further includes a spot detection frame (66), on which an air knife (67), a re-judgment camera (63) and a warpage detection camera (64) are installed in sequence.

10. The polarizer spot detection device according to claim 1, characterized in that: The unloading unit (7) includes an unloading rack (71) and four receiving boxes (72) located on the unloading rack (71). Each receiving box (72) is provided with an inclined support plate (721).

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