A mobile phone screen defect detection device and method based on image recognition
By designing an image recognition-based mobile phone screen defect detection device, and utilizing the cooperation of a positioning mechanism and a detection mechanism, the problem of the inability to comprehensively detect edge defects of new material screens in existing technologies has been solved, achieving high-precision detection results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN JINXINLONG ELECTRONIC TECH CO LTD
- Filing Date
- 2026-05-09
- Publication Date
- 2026-07-31
AI Technical Summary
Existing mobile phone screen defect detection devices cannot fully detect edge defects in new material screens, resulting in low detection accuracy.
A mobile phone screen defect detection device based on image recognition was designed. Through the cooperation of a positioning mechanism and a detection mechanism, comprehensive detection of the screen's planes and edges is achieved. The device includes a positioning mechanism for positioning and holding the screen, and a detection mechanism for multi-faceted inspection.
It improves the detection range and accuracy, ensures that the screen does not shift during detection, and achieves comprehensive detection of the screen surface and edges.
Smart Images
Figure CN122487385A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of screen defect detection, specifically to a device and method for detecting mobile phone screen defects based on image recognition. Background Technology
[0002] Some mobile phone screens are made of a variety of new materials such as optical films, polymer adhesives, and ultra-thin glass during the manufacturing process. The material properties and micro-defects will determine the display quality of the mobile phone screen. When inspecting them, different wavelengths of light are generally used to check the surface quality of the material and whether there are defects such as particles and cracks.
[0003] Existing mobile phone screen defect detection devices typically use industrial cameras to detect defects by examining the display screen under different wavelengths of light. However, since industrial cameras are fixed on the top surface, they can only detect one side of the screen and cannot detect microscopic anomalies such as edge defects in new material screens, resulting in low detection accuracy. Therefore, improvements are needed. Summary of the Invention
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a mobile phone screen defect detection device and method based on image recognition, which reduces the problem of low detection accuracy when detecting mobile phone screens made of new materials.
[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a mobile phone screen defect detection device based on image recognition, comprising a mounting base; a shielding shell fixedly connected to the middle of the top surface of the mounting base; a positioning mechanism provided inside the shielding shell; a pushing cylinder fixedly connected to the inner bottom surface of the middle of the mounting base, and the telescopic end of the pushing cylinder fixedly connected to the bottom surface of the positioning mechanism; a detection mechanism provided above the positioning mechanism; the positioning mechanism of the detection mechanism cooperating with the mounting base; a light-emitting plate provided on the top surface of the positioning mechanism; and feeding mechanisms provided on both sides of the shielding shell, which cooperate with the mounting base.
[0006] Preferably, the positioning mechanism includes a mounting plate, a fixing column, a placement plate, a pushing assembly, a moving box, a positioning block, a limiting column, a silicone block, a limiting block, a limiting column, a contact column, and a limiting groove; the mounting plate is fixedly connected to the telescopic end of the pushing cylinder; the fixing column is fixedly connected to the center of the top surface of the mounting plate; and the placement plate is fixedly connected to the top surface of the fixing column.
[0007] Preferably, the limiting groove is formed through the upper surface of the placement tray, and four limiting grooves are evenly distributed in a ring at equal angles; the movable box slides inside the limiting groove; the positioning block is slidably connected to the inside of the movable box, and the side of the positioning block away from the center of the placement tray is set as an inclined surface; a circular groove is formed on the top surface of the positioning block; the limiting post is slidably connected inside the circular groove, and the lower end of the limiting post passes through the positioning block and is fixedly connected to the bottom surface of the movable box; a helical spring is sleeved on the outside of the limiting post, and the two ends of the helical spring are respectively fixedly connected to the sides of the positioning block and the movable box that are close to each other; the silicone block is fixed. The positioning block is attached to the upper end of the side of the positioning block near the center of the placement tray; rectangular grooves are opened on both sides of the inner side of the limiting groove, and the limiting block is slidably connected to the inner side of the rectangular groove; the side of the limiting blocks that are close to each other is fixedly connected to the surface of the moving box; the limiting post is slidably connected to the inner side of the limiting block, and the two ends of the limiting post pass through the limiting block and are fixedly connected to the inner side of the rectangular groove; a threaded spring is sleeved on the outer side of the limiting post, and the two ends of the threaded spring are respectively fixedly connected to the rectangular groove and the side of the limiting block away from the center of the placement tray; the contact post is fixedly connected to the bottom surface of the moving box; the pushing component is set outside the fixed post, and the pushing component cooperates with the contact post.
[0008] Preferably, the pushing assembly includes a connecting sleeve, a contact plate, a fixed gear ring, a rotating gear, and a drive motor; the connecting sleeve is rotatably sleeved on the outside of the fixed post; the contact plate is fixedly sleeved on the outside of the top of the connecting sleeve, and the outer perimeter of the contact plate is set in a trapezoidal shape, with the contact plate parallel to the upper end of the contact post; the fixed gear ring is fixedly sleeved on the outside of the lower end of the connecting sleeve; the rotating gear meshes with the fixed gear ring; the drive motor is fixedly mounted on the top surface of the mounting plate, and the output end of the drive motor is fixedly connected to the center of the rotating gear.
[0009] Preferably, the detection mechanism includes a mounting ring, a semi-circular plate, a semi-toothed ring, a moving plate, a drive gear, an industrial camera, a connecting rod, a rotating ring, and a linkage assembly; the mounting ring is positioned above the placement plate; the semi-circular plate is fixedly connected to the top surface of the mounting ring; the semi-toothed ring is fixedly connected to one side of the top surface of the semi-circular plate; the mounting ring has a through slot, and the moving plate is slidably connected inside the through slot; the industrial camera is fixedly mounted on the side of the moving plate near the center of the semi-circular plate; the drive gear meshes with the semi-toothed ring; a stepper motor is fixedly mounted on the end of the moving plate away from the industrial camera, and the output end of the stepper motor passes through the moving plate and is fixedly connected to the center of the drive gear.
[0010] Preferably, the connecting rod is fixed to the bottom surface of the mounting ring, and there are two connecting rods that are symmetrical to each other; the rotating ring is located below the mounting ring and is rotatably connected to the top surface of the mounting base, and the bottom end of the connecting rod is fixed to the upper surface of the rotating ring; the linkage component is located on the outside of the connecting sleeve, and the linkage component cooperates with the connecting rod.
[0011] Preferably, the linkage assembly includes a drive sleeve, a connecting rod, a sliding sleeve, a connecting gear sleeve, a separating plate, a spur gear, and a connecting motor; the drive sleeve is rotatably sleeved on the outside of the connecting sleeve; the connecting rod is fixedly connected to both sides of the drive sleeve; the sliding sleeve is fixedly connected to the end of the drive sleeve away from the drive sleeve, and the inner side of the sliding sleeve is slidably connected to the surface of the connecting rod; the separating plate is fixedly connected to the upper end of the drive sleeve, and the two sides of the separating plate are set at an angle, and the separating plate is parallel to the lower end of the contact post; the connecting gear sleeve is fixedly sleeved on the lower end of the drive sleeve; the spur gear is meshed with the connecting gear sleeve; the connecting motor is located below the spur gear and fixedly installed with the mounting plate; the output end of the connecting motor is fixedly connected to the center of the spur gear.
[0012] Preferably, the feeding mechanism includes a mounting box, a setting frame, a conveyor belt, a rotating column, a moving block, and a telescopic pressure cylinder; the mounting box is fixedly connected to the top surface of the mounting base; the setting frame slides on the top of the mounting box; the conveyor belt is set inside the setting frame, with one conveyor belt higher than the other, and the rotating column is contacted and set inside both ends of the conveyor belt and connected to the rotating inner surface of the setting frame; a servo motor is fixedly installed on the outer side of one end of the setting frame, and the output end of the servo motor passes through the setting frame and is fixedly connected to the rotating column.
[0013] Preferably, the movable block is fixedly connected to the bottom surface of the mounting frame; the telescopic cylinder is fixedly installed inside the mounting box, and the telescopic end of the telescopic cylinder is fixedly connected to the movable block.
[0014] A detection method based on an image recognition-based mobile phone screen defect detection device includes the following steps: Step 1: First, prepare by having the drive motor rotate the gear. The gear and the fixed gear ring work together to rotate the connecting sleeve. Since the connecting sleeve is fixed to the contact plate, the contact plate will rotate, causing the trapezoidal surface on the outer side of the contact plate to contact the surface of the contact post. The contact post will move along the inclined edge of the trapezoid and move away from each other. When the contact post moves away from each other, the fixed moving box will move the positioning block and the silicone block away from the center of the placement tray. When the positioning blocks move away from each other, the inclined surface on the back will contact the placement tray. With continuous movement, the positioning block will retract into the moving box under the influence of the inclined surface on the back, thus preventing the positioning block from blocking the screen that is about to be transmitted. At the same time, the contact plate will stop rotating and lock. Step 2: Place the new material mobile phone screen to be tested on the top of the higher conveyor belt. Then, start the telescopic cylinder to retract it and move the setting frame a certain distance into the shielding shell through the moving block. At this time, one end of the setting frame is close to the center of the placement tray. Then, the servo motor starts and drives the rotating column to rotate forward. When the rotating column rotates forward, it drives the conveyor belt to transport the mobile phone screen to the center of the placement tray, thus sending the display screen to the center of the placement tray and completing the conveying. After the conveying is completed, the telescopic cylinder will push the conveyor belt to move out of the shielding shell. After the conveying is completed, the contact plate rotates again. At the same time, the helical spring on the outside of the limiting post pushes the limiting block to bear force. The limiting block will drive the fixed moving box and the contact post to be pushed towards the center of the placement tray. When the contact plate rotates and separates again, the contact post under the moving box will contact the trapezoidal surface of the contact plate again and slowly reset. During the reset process, the positioning block disengages from the limiting post, and then the helical spring on the outside of the limiting post will push the positioning block and the silicone block out. With continuous movement, the silicone block will contact the mobile phone screen and push it to the center of the placement tray, above the light plate. The silicone block will then contact the four sides of the screen to complete its positioning and clamping, preventing shaking during testing and making it more stable during testing. Step 3: After the phone screen is clamped, the push cylinder will push the positioning mechanism holding the display screen to move upward. During the movement, the drive sleeve will drive the connecting rod and sliding sleeve to move upward along the connecting rod and stop moving within the semi-circular plate. At this time, the display screen needs to be tested. The light-emitting plate is activated to emit light of different wavelengths to illuminate the screen. At the same time, the industrial camera is activated, and the stepper motor drives the drive gear to rotate in the forward direction. Since the drive gear is engaged with the semi-gear ring, the stepper motor will drive the movable plate installed with it to be subjected to force. The movable plate slides inside the semi-circular plate, which will cause the movable plate to move along the semi-circular plate. When the movable plate moves, it will drive the industrial camera to move at the same time, and the industrial camera will detect the screen. As the industrial camera moves along the semicircular plate, the connecting motor is activated to drive the spur gear to rotate. When the spur gear rotates, it drives the drive sleeve to rotate through the connecting sleeve. When the drive sleeve rotates, it drives the sliding sleeve to be stressed through the fixed connecting rod. In turn, the sliding sleeve drives the connecting rod to be stressed, causing the connecting rod to drive the mounting ring to rotate. This causes the industrial camera to rotate as it moves, thus detecting both the screen surface and edges. As the industrial camera rotates, the separation plate also rotates with it. The angled sides of the separation plate come into contact with the surfaces of the two contact pillars, causing the two symmetrical positioning blocks to move away from each other and contact the placement tray. They then retract into the moving box to prevent obstruction of the industrial camera's inspection view, which would prevent the screen defects from being detected. Meanwhile, the other two unmoved positioning blocks continue to hold the phone screen stably with silicone blocks, making the inspection more stable. Step 4: After the test is completed, pushing the cylinder will cause the phone screen to drop and the contact plate to contact the contact post again, so that the positioning block will release the phone screen and retract it. At this time, the higher setting frame will enter the shielding shell and push the phone screen away to move towards the lower conveyor belt. The lower conveyor belt will also approach the placement tray and wait for the phone screen to be pushed over and then sent out. After that, the conveyor belt will be reset and ready for the next use.
[0015] (III) Beneficial Effects This invention provides a device and method for detecting defects in mobile phone screens based on image recognition. It has the following beneficial effects: By setting up a positioning mechanism and a detection mechanism to work together, the detection mechanism can perform comprehensive detection of the plane and edges of the positioned mobile phone screen, thereby increasing the detection range and improving detection accuracy.
[0016] By setting up a positioning mechanism, the mobile phone screen to be inspected can be positioned and clamped, reducing the problem of screen displacement during inspection and improving inspection accuracy.
[0017] The testing agency can continue to move and test in a severely hemispherical shape, thus allowing for a wider and more comprehensive testing range. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of a mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 2 This is a schematic diagram of the internal cross-sectional structure of a mobile phone screen defect detection device and method based on image recognition proposed in this invention; Figure 3 This is a schematic diagram of the mating relationship between the mounting ring and the semi-circular plate in a mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 4 This is a schematic diagram of the cooperation relationship between the conveyor belt and the rotating column in a mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 5 This is a schematic diagram of the cooperation relationship between the moving box and the positioning block in a mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram showing the mating relationship between the connecting sleeve and the contact plate in the mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 8 This is a schematic diagram showing the cooperation relationship between the limiting block and the moving box in a mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 9 This is a schematic diagram of the linkage and sliding sleeve cooperation relationship of a mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 10 This is a schematic diagram showing the mating relationship between the drive sleeve and the separation plate in a mobile phone screen defect detection device and method based on image recognition proposed in this invention. Figure 11 This is a schematic diagram of the internal cross-sectional structure of the placement tray of the mobile phone screen defect detection device and method based on image recognition proposed in this invention.
[0019] The components include: 1. Mounting base; 2. Cover shell; 3. Positioning mechanism; 4. Pushing cylinder; 5. Detection mechanism; 6. Feeding mechanism; 7. Polishing plate; 301. Mounting plate; 302. Fixing column; 303. Placement tray; 304. Pushing assembly; 305. Moving box; 306. Positioning block; 307. Limiting column; 308. Silicone block; 309. Limiting block; 310. Restricting column; 311. Contact column; 312. Restricting groove; 30401. Connecting sleeve; 30402. Contact plate; 30403. Fixing gear ring; 30404. Rotary gear; 30405. Drive motor. Machine; 501, Mounting ring; 502, Semicircular plate; 503, Semi-toothed ring; 504, Moving plate; 505, Drive gear; 506, Industrial camera; 507, Connecting rod; 508, Rotating ring; 509, Linkage assembly; 50901, Drive sleeve; 50902, Linking rod; 50903, Sliding sleeve; 50904, Connecting toothed sleeve; 50905, Separating plate; 50906, Spur gear; 50907, Connecting motor; 601, Mounting box; 602, Setting frame; 603, Conveyor belt; 604, Rotating column; 605, Moving block; 606, Telescopic cylinder. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example
[0021] like Figures 1-11 As shown, this embodiment of the invention provides a mobile phone screen defect detection device based on image recognition, including a mounting base 1; a shielding shell 2 is fixedly connected to the middle of the top surface of the mounting base 1; a positioning mechanism 3 is provided inside the shielding shell 2; a pushing cylinder 4 is fixedly connected to the inner bottom surface of the middle of the mounting base 1, and the telescopic end of the pushing cylinder 4 is fixedly connected to the bottom surface of the positioning mechanism 3; a detection mechanism 5 is provided above the positioning mechanism 3; the detection mechanism 5 cooperates with the positioning mechanism 3 and the mounting base 1; a light-shielding plate 7 is provided on the top surface of the positioning mechanism 3; feeding mechanisms 6 are provided on both sides of the shielding shell 2, and the feeding mechanisms 6 cooperate with the mounting base 1.
[0022] In the above process, the positioning mechanism 3 positions the phone, and after positioning, the detection mechanism 5 performs a comprehensive inspection of the plane and edges of the positioned phone screen, thereby enhancing the detection range and accuracy.
[0023] The positioning mechanism 3 includes a mounting plate 301, a fixing post 302, a placement plate 303, a pushing assembly 304, a moving box 305, a positioning block 306, a limiting post 307, a silicone block 308, a limiting block 309, a limiting post 310, a contact post 311, and a limiting groove 312; the mounting plate 301 is fixedly connected to the telescopic end of the pushing cylinder 4; the fixing post 302 is fixedly connected to the center of the top surface of the mounting plate 301; and the placement plate 303 is fixedly connected to the top surface of the fixing post 302.
[0024] As described above, the positioning mechanism 3 can be used to position the mobile phone screen, reducing the problem of the mobile phone screen shifting during inspection.
[0025] A limiting groove 312 is formed through the upper surface of the placement tray 303, and four limiting grooves 312 are evenly distributed in a ring at equal angles. The movable box 305 slides inside the limiting groove 312. The positioning block 306 is slidably connected to the inside of the movable box 305, and the side of the positioning block 306 away from the center of the placement tray 303 is set as an inclined surface. A circular groove is formed on the top surface of the positioning block 306. A limiting post 307 is slidably connected inside the circular groove, and the lower end of the limiting post 307 passes through the positioning block 306 and is fixedly connected to the inner bottom surface of the movable box 305. A helical spring is sleeved on the outside of the limiting post 307, and the two ends of the helical spring are fixedly connected to the sides of the positioning block 306 and the movable box 305 that are close to each other. A silicone block 308 is fixedly connected to the positioning block. 306 is located on the upper end of the side near the center of the placement tray 303; rectangular grooves are formed on both sides of the inner side of the limiting groove 312, and the limiting block 309 is slidably connected to the inner side of the rectangular groove; the side of the limiting blocks 309 that is close to each other is fixedly connected to the surface of the moving box 305; the limiting post 310 is slidably connected to the inner side of the limiting block 309, and both ends of the limiting post 310 pass through the limiting block 309 and are fixedly connected to the inner side of the rectangular groove; a threaded spring is sleeved on the outer side of the limiting post 310, and both ends of the threaded spring are fixedly connected to the rectangular groove and the side of the limiting block 309 away from the center of the placement tray 303, respectively; the contact post 311 is fixedly connected to the bottom surface of the moving box 305; the pushing component 304 is located outside the fixed post 302, and the pushing component 304 cooperates with the contact post 311.
[0026] In the above, a silicone block 308 is used to clamp the mobile phone screen to prevent damage to the screen due to excessive hardness.
[0027] The driving assembly 304 includes a connecting sleeve 30401, a contact plate 30402, a fixed gear ring 30403, a rotating gear 30404, and a drive motor 30405. The connecting sleeve 30401 is rotatably sleeved on the outside of the fixed post 302. The contact plate 30402 is fixedly sleeved on the outside of the top of the connecting sleeve 30401, and the outer periphery of the contact plate 30402 is set in a trapezoidal shape. The contact plate 30402 is parallel to the upper end of the contact post 311. The fixed gear ring 30403 is fixedly sleeved on the outside of the lower end of the connecting sleeve 30401. The rotating gear 30404 meshes with the fixed gear ring 30403. The drive motor 30405 is fixedly installed on the top surface of the mounting plate 301, and the output end of the drive motor 30405 is centrally connected to the rotating gear 30404.
[0028] In the above, by setting the contact plate 30402 to be trapezoidal around its perimeter and parallel to the upper end of the contact post 311, the contact plate 30402 can drive the contact post 311 to move synchronously away from or closer to the clamping position through the trapezoidal shape around its perimeter.
[0029] The testing mechanism 5 includes a mounting ring 501, a semi-circular plate 502, a semi-toothed ring 503, a moving plate 504, a drive gear 505, an industrial camera 506, a connecting rod 507, a rotating ring 508, and a linkage assembly 509. The mounting ring 501 is positioned above the placement plate 303. The semi-circular plate 502 is fixedly connected to the top surface of the mounting ring 501. The semi-toothed ring 503 is fixedly connected to one side of the top surface of the semi-circular plate 502. The mounting ring 501 has a through slot, and the moving plate 504 is slidably connected to the inside of the through slot. The industrial camera 506 is fixedly mounted on the side of the moving plate 504 near the center of the semi-circular plate 502. The drive gear 505 is meshed with the semi-toothed ring 503. A stepper motor is fixedly mounted on the end of the moving plate 504 away from the industrial camera 506, and the output end of the stepper motor passes through the moving plate 504 and is fixedly connected to the center of the drive gear 505.
[0030] In the above process, the testing unit 5 moves along the semicircular area to test multiple sides of the display screen.
[0031] The connecting rod 507 is fixed to the bottom surface of the mounting ring 501, and there are two connecting rods 507 that are symmetrical to each other; the rotating ring 508 is located below the mounting ring 501 and is rotatably connected to the top surface of the mounting base 1, and the bottom end of the connecting rod 507 is fixed to the upper surface of the rotating ring 508; the linkage component 509 is located on the outside of the connecting sleeve 30401, and the linkage component 509 cooperates with the connecting rod 507.
[0032] In the above, the mounting ring 501 is supported by the cooperation of the connecting rod 507, the mounting ring 501 and the rotating ring 508.
[0033] The linkage assembly 509 includes a drive sleeve 50901, a connecting rod 50902, a sliding sleeve 50903, a connecting gear sleeve 50904, a separating plate 50905, a spur gear 50906, and a connecting motor 50907. The drive sleeve 50901 is rotatably sleeved on the outside of the connecting sleeve 30401. The connecting rod 50902 is fixedly connected to both sides of the drive sleeve 50901. The sliding sleeve 50903 is fixedly connected to the end of the drive sleeve 50901 away from the drive sleeve 50901, and the inner side of the sliding sleeve 50903 is flush with the surface of the connecting rod 507. Sliding connection; the separation plate 50905 is fixedly connected to the upper end of the drive sleeve 50901, and the two sides of the separation plate 50905 are set at an angle, and the separation plate 50905 is parallel to the lower end of the contact post 311; the connecting gear sleeve 50904 is fixedly sleeved on the lower end of the drive sleeve 50901; the spur gear 50906 is meshed with the connecting gear sleeve 50904; the connecting motor 50907 is set below the spur gear 50906 and fixedly installed with the mounting plate 301; the output end of the connecting motor 50907 is fixedly connected to the center of the spur gear 50906.
[0034] In the above, the linkage component 509 can prevent the clamping from blocking the detection range during detection.
[0035] The feeding mechanism 6 includes a mounting box 601, a setting frame 602, a conveyor belt 603, a rotating column 604, a moving block 605, and a telescopic pressure cylinder 606; the mounting box 601 is fixedly connected to the top surface of the mounting base 1; the setting frame 602 slides on the top of the mounting box 601; the conveyor belts 603 are set inside the setting frame 602, with one conveyor belt 603 being higher than the other conveyor belt 603, and the rotating column 604 is contacted and set inside both ends of the conveyor belts 603 and connected to the rotating inner surface of the setting frame 602; a servo motor is fixedly installed on the outer side of one end of the setting frame 602, and the output end of the servo motor passes through the setting frame 602 and is fixedly connected to the rotating column 604.
[0036] As described above, the feeding mechanism 6 can complete the feeding and discharging operations of the mobile phone screen.
[0037] The movable block 605 is fixedly connected to the bottom surface of the setting frame 602; the telescopic cylinder 606 is fixedly installed inside the mounting box 601, and the telescopic end of the telescopic cylinder 606 is fixedly connected to the movable block 605.
[0038] In the above description, the telescopic cylinder 606 is located inside the mounting box 601, which can protect it.
[0039] A detection method based on an image recognition-based mobile phone screen defect detection device includes the following steps: Step 1: First, prepare by having the drive motor 30405 rotate the rotating gear 30404. The rotating gear 30404, in conjunction with the fixed gear ring 30403, causes the fixed gear ring 30403 to rotate the connecting sleeve 30401. Since the connecting sleeve 30401 is fixed to the contact plate 30402, it then rotates the contact plate 30402, causing the trapezoidal surface on the outer side of the contact plate 30402 to contact the surface of the contact post 311. The contact post 311 then moves along the inclined edge of the trapezoid, simultaneously... As the contact posts 311 move away from each other, the fixed moving box 305 will drive the positioning block 306 and silicone block 308 to move away from the center of the placement tray 303 simultaneously. When the positioning blocks 306 move away from each other, the inclined surface on the back will also contact the placement tray 303. As they move, the positioning blocks 306 will retract into the moving box 305 under the influence of the inclined surface on the back, thereby preventing the positioning blocks 306 from blocking the screen that is about to be transmitted. At the same time, the contact plate 30402 will stop rotating and lock. Step 2: Place the new material mobile phone screen to be tested on the top of the higher conveyor belt 603. Then, start the telescopic cylinder 606 to retract it. The moving block 605 drives the setting frame 602 to move a distance into the shielding shell 2. At this time, one end of the setting frame 602 is close to the middle of the placement tray 303. Then, the servo motor starts and drives the rotating column 604 to rotate forward. When the rotating column 604 rotates forward, it drives the conveyor belt 603 to transport the mobile phone screen to the center of the placement tray 303, thus sending the display screen to the middle of the placement tray 303 and completing the transport. After the transport is completed, the telescopic cylinder 606 will push the conveyor belt 603 to move out of the interior of the shielding shell 2. After the conveying is completed, the contact plate 30402 rotates again. At the same time, the spiral spring on the outside of the limiting post 310 pushes the limiting block 309 to bear force. The limiting block 309 will drive the fixed moving box 305 and the contact post 311 to be pushed towards the center of the placement plate 303. When the contact plate 30402 rotates and separates again, the contact post 311 under the moving box 305 will contact the trapezoidal surface of the contact plate 30402 again and gradually reset slowly. During the reset process, the positioning block 306 disengages from the limit, and then the spiral spring on the outside of the limiting post 307 will push the positioning block 306 and the silicone block 308 out. Under continuous movement, the silicone block 308 will contact the mobile phone screen and push it to the center of the placement plate 303, above the light plate 7. The silicone block 308 will then contact the four sides of the screen to complete the positioning and clamping, preventing shaking during the test and making it more stable during the test. Step 3: After the mobile phone screen is clamped, the push cylinder 4 will push the positioning mechanism 3 that clamps the display screen to move upward. During the movement, the drive sleeve 50901 will drive the connecting rod 50902 and the sliding sleeve 50903 to move upward along the connecting rod 507 and stop moving within the semi-circular plate 502. At this time, the display screen needs to be tested. The illumination plate 7 is activated to emit light of different wavelengths to illuminate the screen. At the same time, the industrial camera 506 is activated, and the stepper motor drives the drive gear 505 to rotate in the forward direction. Since the drive gear 505 is engaged with the semi-gear ring 503, the stepper motor will drive the movable plate 504 mounted thereon to be subjected to force. The movable plate 504 slides inside the semi-circular plate 502, which will cause the movable plate 504 to move along the semi-circular plate 502. When the movable plate 504 moves, it will drive the industrial camera 506 to move at the same time, and the industrial camera 506 will detect the screen. When the industrial camera 506 moves along the semicircular plate 502, the connecting motor 50907 is activated to drive the spur gear 50906 to rotate. When the spur gear 50906 rotates, it will drive the drive sleeve 50901 to rotate through the connecting sleeve 50904. When the drive sleeve 50901 rotates, it will drive the sliding sleeve 50903 to be stressed through the fixed connecting rod 50902. In turn, the sliding sleeve 50903 will drive the connecting rod 507 to be stressed, causing the connecting rod 507 to drive the mounting ring 501 to rotate, thereby driving the industrial camera 506 to rotate while moving, and to detect both the screen surface and the edges. As the industrial camera 506 rotates, the separation plate 50905 also rotates with it. The angled sides of the separation plate 50905 come into contact with the surfaces of the two contact posts 311, causing the two symmetrical positioning blocks 306 to move away from each other and contact the placement tray 303. They then retract into the moving box 305 to prevent obstruction of the detection view of the industrial camera 506, which would prevent the screen defects from being detected. Meanwhile, the other two unmoved positioning blocks 306 still stably hold the mobile phone screen with the silicone block 308, making the detection more stable. Step 4: After the test is completed, pushing the cylinder 4 will cause the mobile phone screen to drop, and the contact plate 30402 will contact the contact post 311 again, so that the positioning block 306 will release the mobile phone screen and retract it. At this time, the higher setting frame 602 will enter the shielding shell 2 and push the mobile phone screen away to move towards the lower conveyor belt 603. The lower conveyor belt 603 will also approach the placement tray 303 and wait for the mobile phone screen to be pushed over. After it is conveyed out, the conveyor belt 603 will be reset and ready for the next use.
[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A mobile phone screen defect detection device based on image recognition, comprising a mounting base (1); characterized in that: A shielding shell (2) is fixedly connected to the middle of the top surface of the mounting base (1); a positioning mechanism (3) is provided inside the shielding shell (2); a push cylinder (4) is fixedly connected to the bottom surface of the middle end of the mounting base (1), and the telescopic end of the push cylinder (4) is fixedly connected to the bottom surface of the positioning mechanism (3); a detection mechanism (5) is provided above the positioning mechanism (3); the detection mechanism (5) cooperates with the positioning mechanism (3) and the mounting base (1); a light-shielding plate (7) is provided on the top surface of the positioning mechanism (3); a feeding mechanism (6) is provided on both sides of the shielding shell (2), and the feeding mechanism (6) cooperates with the mounting base (1).
2. The mobile phone screen defect detection device based on image recognition according to claim 1, characterized in that: The positioning mechanism (3) includes a mounting plate (301), a fixing column (302), a placement plate (303), a pushing component (304), a moving box (305), a positioning block (306), a limiting column (307), a silicone block (308), a limiting block (309), a limiting column (310), a contact column (311), and a limiting groove (312); the mounting plate (301) is fixed to the telescopic end of the pushing cylinder (4); the fixing column (302) is fixed to the center of the top surface of the mounting plate (301); and the placement plate (303) is fixed to the top surface of the fixing column (302).
3. The mobile phone screen defect detection device based on image recognition according to claim 2, characterized in that: The limiting groove (312) is formed through the upper surface of the placement tray (303), and the limiting groove (312) is set as four grooves evenly distributed in a ring at equal angles; the movable box (305) slides on the inner side of the limiting groove (312); the positioning block (306) is slidably connected to the inner side of the movable box (305), and the side of the positioning block (306) away from the center of the placement tray (303) is set as an inclined surface; a circular groove is formed on the top surface of the positioning block (306); the limiting post (307) is slidably connected to the inside of the circular groove, and the lower end of the limiting post (307) passes through the positioning block (306) and is fixedly connected to the inner bottom surface of the movable box (305); a helical spring is sleeved on the outer side of the limiting post (307), and the two ends of the helical spring are respectively fixedly connected to the side of the positioning block (306) and the movable box (305) that are close to each other; the silicone block (308) is fixedly connected to the positioning block. (306) The upper end of the side near the center of the placement tray (303); rectangular grooves are provided on both sides of the inner side of the limiting groove (312), and the limiting block (309) is slidably connected to the inner side of the rectangular groove; the side of the limiting blocks (309) that are close to each other is fixedly connected to the surface of the moving box (305); the limiting post (310) is slidably connected to the inner side of the limiting block (309), and the two ends of the limiting post (310) pass through the limiting block (309) and are fixedly connected to the inner side of the rectangular groove; a threaded spring is sleeved on the outer side of the limiting post (310), and the two ends of the threaded spring are fixedly connected to the rectangular groove and the side of the limiting block (309) away from the center of the placement tray (303) respectively; the contact post (311) is fixedly connected to the bottom surface of the moving box (305); the pushing component (304) is arranged outside the fixed post (302), and the pushing component (304) cooperates with the contact post (311).
4. The mobile phone screen defect detection device based on image recognition according to claim 2, characterized in that: The pushing assembly (304) includes a connecting sleeve (30401), a contact plate (30402), a fixed gear ring (30403), a rotating gear (30404), and a drive motor (30405). The connecting sleeve (30401) is rotatably sleeved on the outside of the fixed post (302). The contact plate (30402) is fixedly sleeved on the outside of the top of the connecting sleeve (30401), and the outer periphery of the contact plate (30402) is set in a trapezoidal shape. The contact plate (30402) is parallel to the upper end of the contact post (311). The fixed gear ring (30403) is fixedly sleeved on the outside of the lower end of the connecting sleeve (30401). The rotating gear (30404) meshes with the fixed gear ring (30403). The drive motor (30405) is fixedly installed on the top surface of the mounting plate (301), and the output end of the drive motor (30405) is fixedly connected to the center of the rotating gear (30404).
5. The mobile phone screen defect detection device based on image recognition according to claim 4, characterized in that: The detection mechanism (5) includes a mounting ring (501), a semicircular plate (502), a semi-toothed ring (503), a moving plate (504), a drive gear (505), an industrial camera (506), a connecting rod (507), a rotating ring (508), and a linkage assembly (509); the mounting ring (501) is positioned above the placement plate (303); the semicircular plate (502) is fixed to the top surface of the mounting ring (501); and the semi-toothed ring (503) is fixed to one side of the top surface of the semicircular plate (502). The mounting ring (501) has a through slot, and the moving plate (504) is slidably connected to the inside of the through slot; the industrial camera (506) is fixedly installed on the side of the moving plate (504) near the center of the semicircular plate (502); the drive gear (505) is meshed with the semi-tooth ring (503); a stepper motor is fixedly installed at the end of the moving plate (504) away from the industrial camera (506), and the output end of the stepper motor passes through the moving plate (504) and is fixedly connected to the center of the drive gear (505).
6. The mobile phone screen defect detection device based on image recognition according to claim 5, characterized in that: The connecting rod (507) is fixed to the bottom surface of the mounting ring (501), and there are two connecting rods (507) that are symmetrical to each other; the rotating ring (508) is located below the mounting ring (501) and is rotatably connected to the top surface of the mounting base (1), and the bottom end of the connecting rod (507) is fixed to the upper surface of the rotating ring (508); the linkage component (509) is located on the outside of the connecting sleeve (30401), and the linkage component (509) cooperates with the connecting rod (507).
7. The mobile phone screen defect detection device based on image recognition according to claim 5, characterized in that: The linkage assembly (509) includes a drive sleeve (50901), a connecting rod (50902), a sliding sleeve (50903), a connecting gear sleeve (50904), a separating plate (50905), a spur gear (50906), and a connecting motor (50907); the drive sleeve (50901) is rotatably sleeved on the outside of the connecting sleeve (30401); the connecting rod (50902) is fixedly connected to both sides of the drive sleeve (50901); the sliding sleeve (50903) is fixedly connected to the end of the drive sleeve (50901) away from the drive sleeve (50901), and the inner side of the sliding sleeve (50903) is connected to the connecting rod (507). The surface is slidably connected; the separation plate (50905) is fixedly connected to the upper end of the drive sleeve (50901), and the two sides of the separation plate (50905) are set at an angle, and the separation plate (50905) is parallel to the lower end of the contact post (311); the connecting tooth sleeve (50904) is fixedly sleeved on the lower end of the drive sleeve (50901); the spur gear (50906) is meshed with the connecting tooth sleeve (50904); the connecting motor (50907) is set below the spur gear (50906) and fixedly installed with the mounting plate (301); the output end of the connecting motor (50907) is fixedly connected to the center of the spur gear (50906).
8. The mobile phone screen defect detection device based on image recognition according to claim 1, characterized in that: The feeding mechanism (6) includes a mounting box (601), a setting frame (602), a conveyor belt (603), a rotating column (604), a moving block (605), and a telescopic cylinder (606); the mounting box (601) is fixedly connected to the top surface of the mounting base (1); the setting frame (602) slides on the top of the mounting box (601); the conveyor belt (603) is set inside the setting frame (602), with one conveyor belt (603) positioned higher than the other conveyor belt (603), and the rotating column (604) is contacted and set inside both ends of the conveyor belt (603) and connected to the rotating inner surface of the setting frame (602); a servo motor is fixedly installed on the outer side of one end of the setting frame (602), and the output end of the servo motor passes through the setting frame (602) and is fixedly connected to the rotating column (604).
9. A mobile phone screen defect detection device based on image recognition according to claim 8, characterized in that: The movable block (605) is fixedly connected to the bottom surface of the setting frame (602); the telescopic cylinder (606) is fixedly installed inside the mounting box (601), and the telescopic end of the telescopic cylinder (606) is fixedly connected to the movable block (605).
10. The detection method proposed by the image recognition-based mobile phone screen defect detection device according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: First, prepare by driving the motor (30405) to rotate the rotating gear (30404). With the cooperation of the rotating gear (30404) and the fixed gear ring (30403), the fixed gear ring (30403) drives the connecting sleeve (30401) to rotate. Since the connecting sleeve (30401) and the contact plate (30402) are fixed, the contact plate (30402) will then rotate, causing the trapezoidal surface on the outer side of the contact plate (30402) to contact the surface of the contact post (311). The contact post (311) will move along the inclined edge of the trapezoid. As the contact posts (311) move away from each other, the fixed moving box (305) will drive the positioning block (306) and silicone block (308) to move away from the center of the placement tray (303) simultaneously. When the positioning blocks (306) move away from each other, the inclined surface on the back will also contact the placement tray (303). As they move, the positioning blocks (306) will retract into the moving box (305) under the influence of the inclined surface on the back, thereby preventing the positioning blocks (306) from blocking the screen that is about to be transmitted. At the same time, the contact plate (30402) will stop rotating and lock. Step 2: Place the new material mobile phone screen to be tested on the top of the higher conveyor belt (603), then start the telescopic cylinder (606) to retract it, and drive the setting frame (602) to move a distance into the shield shell (2) through the moving block (605). At this time, one end of the setting frame (602) is close to the middle of the placement tray (303). Then the servo motor starts and drives the rotating column (604) to rotate in the forward direction. When the rotating column (604) rotates in the forward direction, it drives the conveyor belt (603) to transport the mobile phone screen to the center of the placement tray (303), thereby sending the display screen to the middle of the placement tray (303) and completing the transport. After the transport is completed, the telescopic cylinder (606) will push the conveyor belt (603) to move out of the interior of the shield shell (2). After the conveying is completed, the contact plate (30402) rotates again. At the same time, the helical spring on the outside of the limiting post (310) pushes the limiting block (309) to bear force. The limiting block (309) will drive the fixed moving box (305) and the contact post (311) to be pushed towards the center of the placement plate (303). When the contact plate (30402) rotates and separates again, the contact post (311) under the moving box (305) will contact the trapezoidal surface of the contact plate (30402) again and gradually move. The slow reset occurs as the positioning block (306) disengages from the limit, and the spiral spring on the outside of the limit post (307) pushes out the positioning block (306) and the silicone block (308). With continuous movement, the silicone block (308) comes into contact with the mobile phone screen and pushes it to the center of the placement plate (303), above the light plate (7). The silicone block (308) then contacts the periphery of the screen to complete its positioning and clamping, preventing it from shaking during testing and making it more stable during testing. Step 3: When the mobile phone screen is clamped, the push cylinder (4) will push the positioning mechanism (3) holding the display screen to move upward. During the movement, the drive sleeve (50901) will drive the connecting rod (50902) and the sliding sleeve (50903) to move upward along the connecting rod (507) and stop moving within the semi-circular plate (502). At this time, the display screen needs to be tested. The light-emitting plate (7) is activated to emit light of different wavelengths to illuminate the screen. At the same time, the industrial camera (506) is activated, and the stepper motor drives the drive gear (505) to rotate in the forward direction. Since the drive gear (505) is engaged with the semi-gear ring (503), the stepper motor will drive the movable plate (504) installed thereon to be subjected to force. The movable plate (504) slides inside the semi-circular plate (502), which will cause the movable plate (504) to move along the semi-circular plate (502). When the movable plate (504) moves, it will drive the industrial camera (506) to move at the same time. At the same time, the industrial camera (506) will detect the screen. When the industrial camera (506) moves along the semicircular plate (502), the connecting motor (50907) is started to drive the spur gear (50906) to rotate. When the spur gear (50906) rotates, it will drive the drive sleeve (50901) to rotate through the connecting sleeve (50904). When the drive sleeve (50901) rotates, it will drive the sliding sleeve (50903) to be stressed through the fixed connecting rod (50902). In turn, the sliding sleeve (50903) will drive the connecting rod (507) to be stressed, so that the connecting rod (507) will drive the mounting ring (501) to rotate, thereby driving the industrial camera (506) to rotate when it moves, and to detect the screen surface and edges. While the industrial camera (506) rotates, the separation plate (50905) also rotates with the industrial camera (506). The angled sides of the separation plate (50905) will contact the surfaces of the two contact posts (311), thereby causing the two symmetrical positioning blocks (306) to contact the placement tray (303) away from each other and retract into the moving box (305) to prevent obstruction of the detection angle of the industrial camera (506) and thus prevent the screen defects from being detected. The other two unmoved positioning blocks (306) still stably clamp the mobile phone screen through the silicone block (308), making the detection more stable. Step 4: After the test is completed, pushing the cylinder (4) will cause the mobile phone screen to drop and make the contact plate (30402) contact the contact post (311) again, so that the positioning block (306) will release the mobile phone screen and retract it. At this time, the higher setting frame (602) will enter the shielding shell (2) and push the mobile phone screen away to move towards the lower conveyor belt (603). The lower conveyor belt (603) will also approach the placement tray (303) and wait for the mobile phone screen to be pushed over and then sent out. After that, the conveyor belt (603) will be reset and wait for the next use.