Visual detection device for RFID tag production and detection method thereof

Abstract

The invention relates to a visual detection device for RFID tag production and a detection method thereof, and relates to the technical field of visual detection.The visual detection device comprises a frame body, an industrial camera, a coaxial light source and an area light source are sequentially arranged in the middle of the frame body from top to bottom, and a display screen and a controller are arranged on one side of the frame body; two rotating rollers are rotationally connected to the middle of the frame body, a damping roller is rotationally connected to one side of the frame body, a driving motor is fixed to the other side of the frame body, a driving roller is fixed to the driving end of the driving motor, and the driving roller and the damping roller are each fixedly sleeved with a label bearing belt. The driving motor drives the driving roller to rotate, on one hand, the effect of active deviation correction is achieved, the overall use effect of the visual inspection device is improved, on the other hand, the effect of real-time cleaning is achieved, the practicability of the visual inspection device is improved, on the other hand, the effect of automatic smoothing is achieved, and the working efficiency of the visual inspection device is improved.

Description

A visual inspection device and inspection method for RFID tag production Technical Field

[0001] This invention relates to the field of visual inspection technology, specifically to a visual inspection device and method for RFID tag production. Background Technology

[0002] As one of the core sensing technologies of the Internet of Things (IoT), RFID technology has been widely applied in logistics warehousing, retail management, intelligent manufacturing, transportation, security traceability and other fields due to its advantages such as non-contact identification, simultaneous reading of multiple targets, large storage capacity and strong environmental adaptability. However, the quality inspection in the current RFID tag production process has significant shortcomings: manual inspection is inefficient, with only 200 to 300 tags per hour and a missed detection rate as high as 15% to 20%; photoelectric sensor detection methods have limitations, only able to identify the presence or simple positional shift of the tag, unable to detect minor printing defects such as missing characters or ink smudges, and unable to identify surface damage of the material; in recent years, some companies have tried to introduce industrial cameras in conjunction with basic image processing algorithms for inspection, but due to the reflective characteristics of the tags and blurring caused by high-speed motion, the actual detection rate is less than 85%. Against this background, RFID tag visual inspection devices have emerged.

[0003] While existing visual inspection devices for RFID tag production can perform visual inspection of RFID tags during the production process, in practical applications, the RFID tag carrier tape is prone to deviation during transportation. Therefore, it is necessary to add a limiting structure in the transmission path to ensure inspection accuracy.

[0004] However, existing carrier belt limiting solutions have significant shortcomings: one type of solution requires an additional drive source to operate the correction components, which not only increases the overall structural complexity of the device but also significantly raises the cost of the vision inspection device and its subsequent operation and maintenance costs; another type of solution uses a fixed correction structure for passive correction. Because the position of this type of structure is fixed, it lacks adjustment redundancy when limiting the carrier belt, making it extremely prone to wear and even tearing damage. In summary, existing solutions fail to balance cost control and reliability, ultimately resulting in a significant reduction in the actual performance of the vision inspection device, thus making its performance unsatisfactory.

[0005] Therefore, it is necessary to invent a visual inspection device and inspection method for RFID tag production to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a visual inspection device and method for RFID tag production, so as to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a visual inspection device for RFID tag production, comprising a frame, wherein an industrial camera, a coaxial light source and a surface light source are arranged sequentially from top to bottom in the middle of the frame, a display screen and a controller are respectively arranged on one side of the frame, two rotating rollers are rotatably connected in the middle of the frame, a damping roller is rotatably connected on one side of the frame, a drive motor is fixed on the other side of the frame, an active roller is fixed at the drive end of the drive motor, a tag carrying strip is fastened on both the active roller and the damping roller, a cylinder is fixed on one side of the frame, a scraper is fixed at the drive end of the cylinder, and a collection box is provided on the inner wall of the frame;

[0008] The frame has grooves on both sides, and the drive roller has a connecting structure with two sliding frames. The connecting structure can move the two sliding frames back and forth in opposite directions along the length of the two grooves to actively limit the conveyed label carrier tape.

[0009] Preferably, the connecting structure includes a driving wheel, which is connected to the driven wheel via a synchronous belt. A rotating frame is fixed in the middle of the driven wheel, and a guide roller is fixed at the other end of the rotating frame. Guide grooves are symmetrically opened on both sides of the guide roller. A guide rod is slidably connected to the inner wall of each guide groove, and a sliding frame is fixed at the lower end of each of the two guide rods.

[0010] Preferably, the driving wheel is fixed in the middle to one side of the driving roller, the driving wheel and the driven wheel are connected by a synchronous belt, the driven wheel is fixed in the middle to one end of the rotating frame, the outer surface of the rotating frame is rotatably connected to the inner wall of the frame, the other end of the rotating frame is fixed to the middle of one end of the guide roller, and the two guide grooves are inclined and closed on both sides of the guide roller.

[0011] Preferably, the outer surfaces of the two guide rods are slidably connected to the inner walls of the two guide grooves, the lower ends of the two guide rods are fixed to one side of the two sliding frames, the outer surfaces of the two sliding frames are slidably connected to the inner walls of the two sliding grooves, the outer surfaces of the two sliding frames on the adjacent sides are in contact with the outer surfaces of the label carrier strip on both sides, the label carrier strip is disposed between the industrial camera and the surface light source, the coaxial light source is disposed on one side of the industrial camera, and the two sliding frames are clearance-fitted with the two rotating rollers.

[0012] Preferably, a drive gear is fixed on one side of the rotating frame, the drive gear meshes with a driven gear, a stabilizing frame is fixed in the middle of the driven gear, a fan impeller is fixed in the middle of the stabilizing frame, a groove is provided on one side of the frame, and a vent hole is provided on one side of the groove.

[0013] Preferably, the driving gear is fixed in the middle to one side of the rotating frame, the driving gear is meshed with the driven gear, and the driving gear has more teeth than the driven gear.

[0014] Preferably, the driven gear is fixed at one end of the stabilizer, the outer surface of the other end of the stabilizer is rotatably connected to the inner wall of the frame, the cross section of the stabilizer is T-shaped, the fan impeller is fixed at the middle of the stabilizer, the fan impeller is set in the groove, one end of the vent hole passes through one side of the groove, and the other end of the vent hole passes through the side of the frame near the label carrying strip.

[0015] Preferably, a fixed rod is fixed on one side of each of the two sliding frames, a connecting frame is rotatably connected to the outer surface of each of the two fixed rods, a connecting rod is rotatably connected to the other end of each of the two connecting frames, a movable frame is fixed to the lower end of each connecting rod, and a through groove is provided on one side of each frame.

[0016] Preferably, the lower ends of the two fixed rods are fixed to one side of the two sliding frames, the outer surfaces of the two fixed rods are rotatably connected to the disjoint ends of the two connecting frames, the near ends of the two connecting frames are rotatably connected to the outer surfaces of the connecting rods, the lower ends of the connecting rods are fixed to one side of the movable frame, the outer surface of the movable frame is slidably connected to the inner wall of the through groove, the movable frame is clearance-fitted with the label carrying strip, and the cross-section of the movable frame is T-shaped.

[0017] A visual inspection method for RFID tag production, using the aforementioned visual inspection device for RFID tag production, includes the following steps:

[0018] S1. Transmission process: Start the drive motor, which drives the active roller to rotate. With the cooperation of the damping roller and the two rotating rollers, the label carrier belt is continuously transmitted according to the preset transmission speed and direction.

[0019] S2. Pre-processing and Inspection Process: While driving the active roller to rotate, the drive motor simultaneously drives two sliding frames to move back and forth in opposite directions. When the two sliding frames approach each other, a lateral thrust is applied to the label carrier belt during the transmission process, limiting it to the middle position of the transmission path. At the same time, the drive motor synchronously drives the moving frame to move along the transmission direction of the label carrier belt, smoothing out any labels that are sticking up on the label carrier belt and making the labels stick tightly to the label carrier belt. Simultaneously, the drive motor drives the fan impeller to rotate, generating airflow to blow away dust and impurities attached to the labels during transmission. During the above pre-processing operation, the industrial camera, coaxial light source, and surface light source are activated. The coaxial light source and surface light source provide supplementary lighting for the labels, and the industrial camera acquires images of the illuminated labels to complete the visual inspection processing of the labels.

[0020] S3. Sorting and Collection Process: After visual inspection, the controller analyzes and judges the label images captured by the industrial camera. When a label is determined to be unqualified, the controller sends a drive signal to the cylinder to control the cylinder to move. The drive end of the cylinder drives the fixedly connected scraper to move, scraping the unqualified label off the label carrier belt. The unqualified label falls into the collection box under the action of gravity. The labels that are determined to be qualified continue to be transported with the label carrier belt and are finally wound normally on the drive roller.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) The present invention drives the active roller to rotate by driving the drive motor, so that the active wheel, driven wheel, rotating frame, guide roller, guide groove, guide rod, sliding frame and slide groove work together to achieve the effect of active correction, effectively avoid the label carrier tape from shifting during transmission, ensure the accuracy of subsequent visual inspection, and thus significantly improve the overall performance of the visual inspection device.

[0023] (2) The present invention drives the active roller to rotate by a drive motor, so that the active gear, driven gear, stabilizer, fan impeller, groove and ventilation hole work together to achieve real-time cleaning effect, effectively avoid foreign objects from interfering with the visual inspection imaging quality, thereby improving the practicality of the visual inspection device;

[0024] (3) The present invention drives the active roller to rotate by driving the drive motor, so that the fixed rod, connecting frame, connecting rod, moving frame and through groove work together to achieve the effect of automatic smoothing, effectively eliminating the appearance defects of the label, avoiding the interference of the visual inspection process due to label wrinkles, thereby significantly improving the working efficiency of the visual inspection device. Attached Figure Description

[0025] Figure 1 is an overall structural diagram of the present invention;

[0026] Figure 2 is a top sectional view of the frame of the present invention;

[0027] Figure 3 is a partial structural cross-sectional view of the present invention;

[0028] Figure 4 is an enlarged view of the structure of part A in Figure 3 of the present invention;

[0029] Figure 5 is a schematic diagram of the rotating frame structure of the present invention;

[0030] Figure 6 is an enlarged view of the structure of part B in Figure 5 of the present invention;

[0031] Figure 7 is a schematic diagram of the mobile frame structure of the present invention;

[0032] Figure 8 is a partial structural schematic diagram of the present invention.

[0033] In the diagram: 1. Frame; 2. Industrial camera; 3. Coaxial light source; 4. Surface light source; 5. Display screen; 6. Controller; 7. Rotating roller; 8. Damping roller; 9. Drive motor; 10. Driven roller; 11. Label carrier belt; 12. Cylinder; 13. Scraper; 14. Collection box; 15. Driven wheel; 16. Driven wheel; 17. Rotating frame; 18. Guide roller; 19. Guide groove; 20. Guide rod; 21. Sliding frame; 22. Slide groove; 23. Driven gear; 24. Driven gear; 25. Stabilizing frame; 26. Fan impeller; 27. Groove; 28. Vent hole; 29. ​​Fixed rod; 30. Connecting frame; 31. Connecting rod; 32. Moving frame; 33. Through groove. Detailed Implementation

[0034] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] This embodiment provides a visual inspection device for RFID tag production;

[0037] Please refer to Figures 1-8. The system includes a frame 1. From top to bottom, an industrial camera 2, a coaxial light source 3, and a surface light source 4 are sequentially arranged in the middle of the frame 1. A display screen 5 and a controller 6 are respectively arranged on one side of the frame 1. Two rotating rollers 7 are rotatably connected in the middle of the frame 1. A damping roller 8 is rotatably connected to one side of the frame 1. A drive motor 9 is fixed to the other side of the frame 1. An active roller 10 is fixed to the drive end of the drive motor 9. Label carrying strips 11 are fastened to both the active roller 10 and the damping roller 8. A cylinder 12 is fixed to one side of the frame 1. A scraper 13 is fixed at the drive end, and a collection box 14 is provided on the inner wall of the frame 1. Slide grooves 22 are provided on both sides of the frame 1. A connecting structure is provided on the drive roller 10. The connecting structure includes a drive wheel 15. The drive wheel 15 is connected to the driven wheel 16 through a synchronous belt. A rotating frame 17 is fixed in the middle of the driven wheel 16. A guide roller 18 is fixed at the other end of the rotating frame 17. Guide grooves 19 are symmetrically provided on both sides of the guide roller 18. A guide rod 20 is slidably connected to the inner wall of each guide groove 19. A sliding frame 21 is fixed at the lower end of each of the two guide rods 20.

[0038] Please refer again to Figures 1-8. The middle part of the driving wheel 15 is fixed to one side of the driving roller 10. The driving wheel 15 and the driven wheel 16 are connected by a synchronous belt. The middle part of the driven wheel 16 is fixed to one end of the rotating frame 17. The outer surface of the rotating frame 17 is rotatably connected to the inner wall of the frame 1. The other end of the rotating frame 17 is fixed to the middle of one end of the guide roller 18. Two guide grooves 19 are inclined and closed on both sides of the guide roller 18. The outer surfaces of the two guide rods 20 are slidably connected to the inner walls of the two guide grooves 19. The lower ends of the two guide rods 20 are fixed to one side of the two sliding frames 21. The outer surfaces of the two sliding frames 21 are slidably connected to the inner walls of the two sliding grooves 22. The outer surfaces of the two sliding frames 21 that are close to each other are in contact with the outer surfaces of the label carrier belt 11. The label carrier belt 11 is set between the industrial camera 2 and the surface light source 4. The coaxial light source 3 is set on one side of the industrial camera 2. The two sliding frames 21 are clearance-fitted with the two rotating rollers 7.

[0039] The specific implementation process is as follows: First, the untested roll of the label carrier belt 11 to be tested is fastened onto the damping roller 8. Then, the free end of the carrier belt 11 is passed through the two rotating rollers 7 in sequence and finally fixed on the drive roller 10, thus forming a stable transmission trajectory that is output from the damping roller 8, guided by the rotating roller 7, and wound up by the drive roller 10. The drive motor 9 is started to drive the drive roller 10 to rotate, and the automated winding and conveying operation of the carrier belt can be completed.

[0040] Simultaneously, the drive motor 9 drives the active roller 10 to rotate, causing the active wheel 15, which is coaxially fixed to the active roller 10, to rotate accordingly. This rotation, via a synchronous belt, drives the driven wheel 16 to rotate synchronously. The rotation of the driven wheel 16 drives the rotating frame 17, which is fixed in the middle, to rotate smoothly under the limiting support of the inner wall of the frame 1. When the rotating frame 17 rotates, it drives the guide roller 18, which is fixed at the other end, to rotate synchronously. Guide grooves 19 are provided on both sides of the guide roller 18. These guide grooves 19 slide in conjunction with guide rods 20, thereby driving the sliding frames 21, which are fixed to the two guide rods 20, to slide in opposite directions along the sliding grooves 22 on both sides of the frame 1. When the two sliding frames 21 approach each other, they push the label carrier strip 11, which has passed through the rotating roller 7, back to the transmission center position, achieving active correction. This effectively prevents the label carrier strip 11 from shifting during transmission, ensuring the accuracy of subsequent visual inspection and significantly improving the overall performance of the visual inspection device.

[0041] When the label carrier belt 11 is conveyed to the inspection station below the industrial camera 2, the coaxial light source 3 and the surface light source 4 configured on the frame 1 are turned on synchronously to provide supplementary lighting for the label surface, thereby optimizing the label imaging clarity. The industrial camera 2 acquires images of the illuminated labels and transmits the acquired image data to the controller 6. The controller 6 analyzes and judges the image data in real time. If a label is determined to be unqualified, a drive signal is immediately sent to the cylinder 12. After receiving the signal, the cylinder 12 drives its output end to move, causing the fixed scraper 13 to move towards the carrier belt, scraping the unqualified label off the label carrier belt 11. The unqualified label falls into the collection box 14 under the action of gravity and is collected uniformly. Labels that are determined to be qualified continue to be conveyed with the label carrier belt 11 and are eventually stably wound onto the drive roller 10.

[0042] Example 2

[0043] The surface of RFID tags to be inspected is prone to dust and impurities. These foreign objects can interfere with the imaging quality of visual inspection, thus affecting the accuracy and reliability of the inspection results. Therefore, the tag surface needs to be cleaned in real time before the visual inspection process to ensure inspection accuracy and improve the practicality of the visual inspection device.

[0044] Please refer to Figures 1-8. A real-time cleaning function has been added based on Embodiment 1.

[0045] Please refer again to Figures 1-8. A drive gear 23 is fixed on one side of the rotating frame 17. The drive gear 23 is meshed with a driven gear 24. A stabilizing frame 25 is fixed in the middle of the driven gear 24. A fan impeller 26 is fixed in the middle of the stabilizing frame 25. A groove 27 is opened on one side of the frame 1. A vent hole 28 is opened on one side of the groove 27. The drive gear 23 is fixed in the middle on one side of the rotating frame 17. The drive gear 23 and the driven gear 24 are meshed. The number of teeth of the drive gear 23 is more than the number of teeth of the driven gear 24. The middle of the driven gear 24 is fixed to one end of the stabilizing frame 25. The outer surface of the other end of the stabilizing frame 25 is rotatably connected to the inner wall of the frame 1. The cross-section of the stabilizing frame 25 is T-shaped. The fan impeller 26 is fixed in the middle of the stabilizing frame 25. The fan impeller 26 is set in the groove 27. One end of the vent hole 28 passes through one side of the groove 27. The other end of the vent hole 28 passes through the side of the frame 1 near the label carrier belt 11.

[0046] The specific implementation process is as follows: The drive motor 9 drives the drive roller 10 to rotate, and the drive wheel 15, which is fixed to the drive roller 10, rotates accordingly. The drive wheel 16 is driven to rotate synchronously via a synchronous belt. The rotation of the driven wheel 16 drives the rotating frame 17, which is fixed to its center, to rotate smoothly under the limiting support of the frame 1. When the rotating frame 17 rotates, it synchronously drives the drive gear 23, which is fixed to one side of it, to rotate. The drive gear 23 meshes with the driven gear 24, thus driving the driven gear 24 to rotate synchronously. Since the drive gear 23 has more teeth than the driven gear 24, they form a speed-increasing transmission structure. When the drive gear 23 rotates at low speed, it can drive the driven gear 24 to rotate at high speed.

[0047] The high-speed rotation of the driven gear 24 drives the centrally fixed stabilizer 25 to rotate stably under the limiting action of the inner wall of the frame 1. This, in turn, drives the fan impeller 26, which is fixed in the middle of the stabilizer 25, to rotate at high speed. When the fan impeller 26 rotates at high speed in the groove 27, it causes air to enter the groove 27 and be discharged directionally through the vent 28 opened on one side of the groove 27. The discharged airflow can directly act on the surface of the label carrier tape 11, blowing away and cleaning the attached dust and impurities, achieving a real-time cleaning effect, effectively avoiding foreign objects from interfering with the visual inspection imaging quality, thereby improving the practicality of the visual inspection device.

[0048] Example 3

[0049] During the transport of RFID tags, the tag surface is prone to peeling and wrinkling due to previous production processes or transmission conditions. These appearance defects interfere with image acquisition and feature recognition by the vision inspection system, leading to deviations in inspection results and requiring additional time for review and analysis of abnormal inspection data, severely reducing the overall efficiency of the inspection operation. Therefore, peeling and wrinkled tags must be smoothed before the vision inspection process to ensure smooth operation and improve the efficiency of the vision inspection device.

[0050] Please refer to Figures 1-8. An automatic smoothing function has been added based on Embodiment 1.

[0051] Please refer again to Figures 1-8. Each of the two sliding frames 21 has a fixed rod 29 fixed on one side. The outer surfaces of the two fixed rods 29 are rotatably connected to a connecting frame 30. The other ends of the two connecting frames 30 are rotatably connected to a connecting rod 31. The lower end of the connecting rod 31 is fixed to a movable frame 32. A through groove 33 is provided on one side of the frame body 1. The lower ends of the two fixed rods 29 are fixed to one side of the two sliding frames 21. The outer surfaces of the two fixed rods 29 are rotatably connected to the opposite ends of the two connecting frames 30. The near ends of the two connecting frames 30 are rotatably connected to the outer surface of the connecting rod 31. The lower end of the connecting rod 31 is fixed to one side of the movable frame 32. The outer surface of the movable frame 32 is slidably connected to the inner wall of the through groove 33. The movable frame 32 is clearance-fitted with the label carrier strip 11. The cross-section of the movable frame 32 is T-shaped.

[0052] The specific implementation process is as follows: The drive motor 9 drives the active roller 10 to rotate, and the active wheel 15, which is fixed to the active roller 10, rotates accordingly. The driven wheel 16 rotates synchronously through the synchronous belt. The rotation of the driven wheel 16 drives the rotating frame 17 and the guide roller 18 to move synchronously. The guide roller 18 presses the guide rod 20 with the guide grooves 19 on both sides, driving the two guide rods 20 and the two sliding frames 21 fixed to them to slide back and forth along the sliding grooves 22 on both sides of the frame 1. When the two sliding frames 21 slide back and forth in opposite directions, they synchronously drive the two fixed rods 29 fixed to one side to move back and forth in the same direction. The fixed rod 29 is rotatably connected to the connecting frame 30 through its outer surface, which drives the connecting rod 31 rotatably connected to the other end of the connecting frame 30 to move in linkage, thereby driving the moving frame 32 to slide back and forth along the through groove 33 opened in the frame 1. The reciprocating sliding frame 32 is in close contact with the tag carrier belt 11 during transmission, which can accurately smooth out any raised or wrinkled RFID tags on the carrier belt, achieving an automatic smoothing effect. This effectively eliminates appearance defects of the tags and avoids the tag wrinkles interfering with the visual inspection process, thereby significantly improving the working efficiency of the visual inspection device.

[0053] A method for visual inspection apparatus in RFID tag production includes the following steps:

[0054] S1. Transmission process: Start the drive motor 9, which drives the active roller 10 to rotate. With the cooperation of the damping roller 8 and the two rotating rollers 7, the label carrier belt 11 is continuously transmitted according to the preset transmission speed and direction.

[0055] S2. Pre-processing and Inspection Process: While driving the active roller 10 to rotate, the drive motor 9 simultaneously drives the two sliding frames 21 to reciprocate in opposite directions. When the two sliding frames 21 approach each other, a lateral thrust is applied to the label carrier belt 11 during the transmission process, limiting it to the middle position of the transmission path. At the same time, the drive motor 9 simultaneously drives the moving frame 32 to move along the transmission direction of the label carrier belt 11, smoothing out any raised labels on the label carrier belt 11 and making the labels stick tightly to the label carrier belt 11. Simultaneously, the drive motor 9 drives the fan impeller 26 to rotate, generating airflow to blow away dust and impurities attached to the labels during transmission. During the above pre-processing operation, the industrial camera 2, coaxial light source 3, and surface light source 4 are activated. The coaxial light source 3 and surface light source 4 provide supplementary lighting for the labels, and the industrial camera 2 acquires images of the labels after supplementary lighting, completing the visual inspection processing of the labels.

[0056] S3. Sorting and Collection Process: After visual inspection, the controller 6 analyzes and judges the label images captured by the industrial camera 2. When a label is determined to be unqualified, the controller 6 sends a drive signal to the cylinder 12 to control the cylinder 12 to move. The drive end of the cylinder 12 drives the fixedly connected scraper 13 to move, scraping the unqualified label off the label carrier belt 11. The unqualified label falls into the collection box 14 under the action of gravity. The labels that are determined to be qualified continue to be transported with the label carrier belt 11 and are finally wound normally on the drive roller 10.

[0057] 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 alterations 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 visual inspection device for RFID tag production, comprising a frame (1), characterized in that: An industrial camera (2), a coaxial light source (3), and a surface light source (4) are arranged sequentially from top to bottom in the middle of the frame (1). A display screen (5) and a controller (6) are respectively arranged on one side of the frame (1). Two rotating rollers (7) are rotatably connected in the middle of the frame (1). A damping roller (8) is rotatably connected on one side of the frame (1). A drive motor (9) is fixed on the other side of the frame (1). An active roller (10) is fixed to the drive end of the drive motor (9). Labels are fastened on both the active roller (10) and the damping roller (8). The carrier belt (11) has a cylinder (12) fixed on one side of the frame (1), and a scraper (13) fixed on the driving end of the cylinder (12). A collection box (14) is provided on the inner wall of the frame (1). Slide grooves (22) are provided on both sides of the frame (1). A connecting structure is provided on the drive roller (10), and two sliding frames (21) are provided on the connecting structure. The connecting structure can carry the two sliding frames (21) to slide back and forth in the length direction of the two slide grooves (22) to actively limit the label carrier belt (11) being transported.

2. The visual inspection device for RFID tag production according to claim 1, characterized in that: The connection structure includes a drive wheel (15), which is connected to a driven wheel (16) via a synchronous belt. A rotating frame (17) is fixed in the middle of the driven wheel (16), and a guide roller (18) is fixed at the other end of the rotating frame (17). Guide grooves (19) are symmetrically opened on both sides of the guide roller (18). A guide rod (20) is slidably connected to the inner wall of each guide groove (19), and a sliding frame (21) is fixed at the lower end of each of the two guide rods (20).

3. The visual inspection device for RFID tag production according to claim 2, characterized in that: The driving wheel (15) is fixed in the middle on one side of the driving roller (10). The driving wheel (15) and the driven wheel (16) are connected by a synchronous belt. The driven wheel (16) is fixed in the middle at one end of the rotating frame (17). The outer surface of the rotating frame (17) is rotatably connected to the inner wall of the frame (1). The other end of the rotating frame (17) is fixed in the middle of one end of the guide roller (18). The two guide grooves (19) are inclined and closed on both sides of the guide roller (18).

4. A visual inspection device for RFID tag production according to claim 2, characterized in that: The outer surfaces of the two guide rods (20) are slidably connected to the inner walls of the two guide grooves (19). The lower ends of the two guide rods (20) are fixed to one side of the two sliding frames (21). The outer surfaces of the two sliding frames (21) are slidably connected to the inner walls of the two sliding grooves (22). The outer surfaces of the two sliding frames (21) on the near side are in contact with the outer surfaces of the label carrier strip (11) on both sides. The label carrier strip (11) is set between the industrial camera (2) and the surface light source (4). The coaxial light source (3) is set on one side of the industrial camera (2). The two sliding frames (21) are in clearance fit with the two rotating rollers (7).

5. A visual inspection device for RFID tag production according to claim 2, characterized in that: A drive gear (23) is fixed on one side of the rotating frame (17), and the drive gear (23) is meshed with a driven gear (24). A stabilizing frame (25) is fixed in the middle of the driven gear (24), and a fan impeller (26) is fixed in the middle of the stabilizing frame (25). A groove (27) is provided on one side of the frame (1), and a ventilation hole (28) is provided on one side of the groove (27).

6. A visual inspection device for RFID tag production according to claim 5, characterized in that: The driving gear (23) is fixed in the middle on one side of the rotating frame (17). The driving gear (23) meshes with the driven gear (24). The number of teeth of the driving gear (23) is greater than the number of teeth of the driven gear (24).

7. A visual inspection device for RFID tag production according to claim 5, characterized in that: The driven gear (24) is fixed at one end of the stabilizer (25), and the outer surface of the other end of the stabilizer (25) is rotatably connected to the inner wall of the frame (1). The cross section of the stabilizer (25) is T-shaped. The fan impeller (26) is fixed at the middle of the stabilizer (25). The fan impeller (26) is set in the groove (27). One end of the vent (28) passes through one side of the groove (27), and the other end of the vent (28) passes through the side of the frame (1) near the label carrier belt (11).

8. A visual inspection device for RFID tag production according to claim 2, characterized in that: Each of the two sliding frames (21) has a fixed rod (29) fixed on one side, and a connecting frame (30) is rotatably connected to the outer surface of each of the two fixed rods (29). A connecting rod (31) is rotatably connected to the other end of each of the two connecting frames (30). A movable frame (32) is fixed to the lower end of the connecting rod (31). A through groove (33) is provided on one side of the frame (1).

9. A visual inspection device for RFID tag production according to claim 8, characterized in that: The lower ends of the two fixed rods (29) are fixed to one side of the two sliding frames (21). The outer surfaces of the two fixed rods (29) are rotatably connected to the opposite ends of the two connecting frames (30). The near ends of the two connecting frames (30) are rotatably connected to the outer surface of the connecting rod (31). The lower end of the connecting rod (31) is fixed to one side of the moving frame (32). The outer surface of the moving frame (32) is slidably connected to the inner wall of the through groove (33). The moving frame (32) is clearance-fitted with the label carrier strip (11). The cross section of the moving frame (32) is T-shaped.

10. A visual inspection method for RFID tag production, employing a visual inspection device for RFID tag production as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Transmission process: Start the drive motor (9), which drives the active roller (10) to rotate. With the cooperation of the damping roller (8) and the two rotating rollers (7), the label carrier belt (11) is continuously transmitted according to the preset transmission speed and direction. S2. Pre-processing and inspection process: While driving the active roller (10) to rotate, the drive motor (9) simultaneously drives the two sliding frames (21) to move back and forth in opposite directions. When the two sliding frames (21) approach each other, a lateral thrust is applied to the label carrier belt (11) during the transmission process, limiting it to the middle position of the transmission path. At the same time, the drive motor (9) simultaneously drives the moving frame (32) to move along the transmission direction of the label carrier belt (11), smoothing the labels that are raised on the label carrier belt (11) and making the labels stick tightly to the label carrier belt (11). Simultaneously, the drive motor (9) drives the fan impeller (26) to rotate, generating airflow to blow onto the surface of the labels during transmission. To blow away dust and impurities attached to the label; during the above pretreatment operation, the industrial camera (2), coaxial light source (3) and surface light source (4) are started. The label is supplemented with light by the coaxial light source (3) and surface light source (4). The industrial camera (2) collects images of the label after supplementation and completes the visual inspection of the label; S3, sorting and collection process: after the visual inspection, the controller (6) analyzes and judges the label image collected by the industrial camera (2). When it is determined to be an unqualified label, the controller (6) sends a drive signal to the cylinder (12) to control the cylinder (12) to move. The drive end of the cylinder (12) drives the fixedly connected scraper (13) to move and scrape the unqualified label off the label carrier belt (11). The unqualified label after scraping off falls into the collection box (14) under the action of gravity; the label that is determined to be qualified continues to be transmitted with the label carrier belt (11) and is finally normally wound on the drive roller (10).

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