A license plate UV code spraying detection device based on visual recognition

Abstract

This invention discloses a visual recognition-based UV inkjet printing detection device for license plates, including a detection support cabinet. A detection support plate is installed on one side of the detection support cabinet, and a feeding and conveying mechanism is installed on the top of the detection support cabinet, including multiple movable conveying plates. A detection component and a rejection component are provided on the output end of the detection and conveying component. The detection component includes a filter plate symmetrically rotatably connected to the bottom of the detection support frame. The rejection component includes a clamping support plate movably arranged at the bottom of the limiting cylinder. Clamping moving plates that move closer or further away from each other are symmetrically arranged at the bottom of the clamping support plate. Right-angle clamping plates that move closer or further away from each other are symmetrically arranged at the bottom of the clamping moving plates. This invention, through the detection component and rejection component, achieves comprehensive anti-counterfeiting detection and efficient rejection of license plates without stopping the production line, improving the comprehensiveness of detection and the continuity of production.

Description

Technical Field

[0001] This invention relates to the field of license plate production technology, and in particular to a visual recognition-based UV inkjet printing detection device for license plates. Background Technology

[0002] In the modern production process of license plates, UV inkjet printing technology is widely used to enhance anti-counterfeiting performance and achieve production traceability. This technology prints invisible or semi-invisible codes, QR codes, and anti-counterfeiting patterns on the surface of the license plate. This information is usually visible or exhibits characteristic changes under light sources of specific wavelengths. Therefore, accurate and efficient online detection of UV inkjet printing and composite anti-counterfeiting labels is a key link in ensuring product quality and combating counterfeiting. In the process of UV inkjet printing inspection of license plates, traditional technology can only detect a single anti-counterfeiting mark on the license plate and cannot adapt to the detection needs of multiple composite anti-counterfeiting marks, resulting in limited detection functions. If full-item inspection is required, multiple devices must be connected in series or manual switching must be relied upon, which seriously reduces efficiency and increases costs. Secondly, traditional technology cannot perform inspection without stopping the machine. Each rejection requires pausing the entire production line, which seriously disrupts the production cycle. Therefore, in order to solve the above problems, a license plate UV inkjet printing inspection device based on vision recognition is proposed. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a visual recognition-based UV inkjet printing detection device for license plates.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A visual recognition-based license plate UV inkjet printing detection device includes a detection support cabinet, a detection support plate installed on one side of the detection support cabinet, a feeding and conveying mechanism installed on the top of the detection support cabinet, a detection conveying component set at the bottom of the detection support plate, and including multiple movable transmission plates. The output end of the detection and conveying assembly is provided with alternating detection components and rejection components. The detection component includes a fixed detection support frame. A filter plate is symmetrically and rotatably connected to the bottom of the detection support frame. Multiple mounting slots are circumferentially arrayed on the filter plate. Fan blades are symmetrically and rotatably connected to the bottom of the detection support frame. The mounting slots of two filter plates overlap to form different light environments. The rejection assembly includes a fixed limiting cylinder, a clamping support plate movably mounted at the bottom of the limiting cylinder, clamping movable plates symmetrically mounted at the bottom of the clamping support plate (moving closer to or further away from each other), and right-angle clamping plates symmetrically mounted at the bottom of the clamping movable plates (moving closer to or further away from each other). The above technical solution further includes: The detection and conveying assembly also includes a conveying motor fixedly installed on the top of the detection support plate. The bottom of the detection support plate is rotatably connected to a driven conveying sprocket and a driving conveying sprocket. The output end of the conveying motor is connected to the driving conveying sprocket. A conveying chain is sleeved between the driven conveying sprocket and the driving conveying sprocket. A conveying slide rail is fixedly connected to the bottom of the conveying motor. Multiple conveying movable plates are slidably arranged on the conveying slide rail. Fixed plates are symmetrically fixedly connected between the conveying movable plates and the conveying chain.

[0005] Each of the clamping support plates or limiting cylinders is fixedly connected to a single transmission moving plate, and the clamping support plates and limiting cylinders are distributed alternately.

[0006] The testing support cabinet is equipped with a correction mechanism, which includes symmetrically arranged correction support plates. The correction support plates are fixedly connected to the top of the testing support cabinet. A limit slide rod is fixedly connected between the two correction support plates. A limit plate is symmetrically slidably arranged between the two limit slide rods. The two correction support plates are rotatably connected to a bidirectional lead screw. The two limit plates are respectively threaded to the positive and negative threads of the bidirectional lead screw. A correction motor is fixedly installed on the side of one of the correction support plates. The output end of the correction motor is fixedly installed to the bidirectional lead screw.

[0007] The detection assembly also includes a light source fixedly connected to the inner side of the detection support frame. One end of each of the two filter plates extending to the inner side of the detection support frame is fixedly connected to a lens-changing driven sprocket. The inner side of the detection support frame is symmetrically rotatably connected to mutually meshing reversing gears. The top of each reversing gear is fixedly connected to a lens-changing driving sprocket. A lens-changing chain is sleeved and connected between the lens-changing driving sprocket and the lens-changing driven sprocket.

[0008] A mirror-changing motor is fixedly connected to the inner side of the detection support frame. The output end of the mirror-changing motor is fixedly installed with a mirror-changing drive sprocket. A detection head is fixedly connected to the inner side of the detection support frame. The fan blade is fixedly connected to the reversing gear. The center of the fan blade is located on the arc of the running trajectory of the mounting slot.

[0009] The inner side of each mounting slot is fitted with a different filter, and the two overlapping filters are different to form a single light environment.

[0010] The rejection assembly also includes an adjusting motor disposed inside the limiting cylinder. The adjusting motor is fixed to the bottom of the transmission moving plate. An adjusting screw is fixedly installed at the output end of the adjusting motor. A moving cylinder is threadedly connected to the adjusting screw. The moving cylinder is slidably disposed inside the limiting cylinder.

[0011] The movable cylinder is fixedly connected to the clamping support plate. A first clamping motor is fixedly connected to the inner side of the movable cylinder. A rotating arm is fixedly connected to the output end of the first clamping motor at the bottom of the clamping support plate. Both ends of the rotating arm are rotatably connected to clamping arms. Guide rails are symmetrically fixedly connected to the bottom of the clamping support plate. The clamping movable plate slides relative to the two guide rails. The other end of the clamping arm is rotatably connected to the clamping movable plate.

[0012] A second clamping motor is fixedly installed on the outer side of the clamping moving plate. A bidirectional clamping screw is fixedly installed at the output end of the second clamping motor. The bidirectional clamping screw is rotatably connected to the clamping moving plate. Threaded moving frames are symmetrically slidably arranged at the bottom of the clamping moving plate. Two threaded moving frames are respectively threaded to the positive and negative threads of the bidirectional clamping screw. A right-angle clamping plate is fixedly connected to the bottom of the threaded moving frames. Rubber pads are symmetrically fixedly connected to the two right-angled sidewalls of the right-angle clamping plate.

[0013] The present invention has the following beneficial effects: In this invention, by setting two filter plates that can rotate synchronously in opposite directions and allowing the mounting slots of different filter plates to overlap and combine, multiple single detection light environments such as ultraviolet light, infrared light, and visible light can be automatically and quickly switched using only one set of light source and one detection head. This allows for comprehensive detection of multiple items such as text on the license plate surface, ultraviolet anti-counterfeiting codes, and infrared anti-counterfeiting features in one process, solving the problems of single function and low efficiency of traditional equipment.

[0014] In this invention, by alternately arranging the detection component and the rejection component on an independently movable transfer plate, when a defective product is detected, the control of the conveyor motor enables the transfer plate carrying the rejection component to move synchronously with the defective product on the production line. In a relatively static state, the four sides of the license plate are firmly clamped by right-angle clamps, achieving accurate grabbing and rejection of defective products without stopping the main line or interrupting production. This completely breaks the bottleneck of traditional detection requiring machine shutdown, and greatly improves production continuity and overall efficiency. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a license plate UV inkjet printing production line; Figure 2 This is a schematic diagram of a license plate UV inkjet printing detection device based on visual recognition according to the present invention. Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the detection and delivery assembly structure in this invention; Figure 5 This is a schematic diagram of the first structure of the rejection component in this invention; Figure 6 This is a schematic diagram of the second structure of the rejection component in this invention; Figure 7 This is a schematic diagram of the first structure of the detection component in this invention; Figure 8 This is a schematic diagram of the second structure of the detection component in this invention; Figure 9 This is a schematic diagram of the third structure of the detection component in this invention.

[0016] In the diagram: 1. Pager; 2. Chip reader; 3. UV printer / curing machine; 4. Detection support plate; 5. Discharge machine; 6. Conveyor motor; 7. Detection support cabinet; 8. Feeding and conveying mechanism; 60. Conveyor slide rail; 61. Fixed plate; 62. Conveyor driven sprocket; 63. Conveyor driving sprocket; 64. Conveyor chain; 65. Conveyor moving plate; 9. Correction support plate; 90. Correction motor; 91. Limiting slide bar; 92. Limiting plate; 93. Bidirectional lead screw; 10. Clamping support plate; 11. Detection support frame; 101. Limiting cylinder; 102. Moving cylinder; 103. Adjusting motor; 104. Adjusting screw; 105. First clamping motor; 106. Clamping arm; 107. Clamping moving plate; 108. Guide rail; 109. Rotating arm; 110. Second clamping motor; 111. Bidirectional clamping screw; 112. Threaded moving frame; 113. Rubber pad; 114. Right-angle clamping plate; 1100. Light source; 1101. Lens changing motor; 1102. Detection head; 1103. Filter plate; 1104. Lens changing driven sprocket; 1105. Reversing gear; 1106. Lens changing drive sprocket; 1107. Lens changing chain; 1108. Fan blade; 1109. Mounting slot. Detailed Implementation

[0017] 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.

[0018] Example 1 like Figures 1-9 As shown, the present invention proposes a visual recognition-based license plate UV inkjet printing detection device, which includes a detection support cabinet 7, a detection support plate 4 installed on one side of the detection support cabinet 7, a feeding and conveying mechanism 8 installed on the top of the detection support cabinet 7, and a detection conveying component set at the bottom of the detection support plate 4, and includes multiple movable transmission moving plates 65. The output end of the detection and conveying assembly is provided with alternating detection components and rejection components. The detection component includes a fixed detection support frame 11. A filter plate 1103 is symmetrically and rotatably connected to the bottom of the detection support frame 11. Multiple mounting slots 1109 are circumferentially arrayed on the filter plate 1103. A fan blade 1108 is symmetrically and rotatably connected to the bottom of the detection support frame 11. The mounting slots 1109 of two filter plates 1103 overlap to form different light environments. The rejection assembly includes a fixed limiting cylinder 101, a clamping support plate 10 that is movably disposed at the bottom of the limiting cylinder 101, a clamping moving plate 107 that is symmetrically disposed at the bottom of the clamping support plate 10 and moves closer or further away from each other, and a right-angle clamping plate 114 that is symmetrically disposed at the bottom of the clamping moving plate 107 and moves closer or further away from each other.

[0019] In actual production, the system also includes a collating machine 1, a chip recognition machine 2, and a UV printing and curing machine 3. A discharge machine 5 is also located on the other side of the inspection support plate 4. A long conveyor belt connects the collating machine 1, the chip recognition machine 2, and the UV printing and curing machine 3. The collating machine 1 separates the license plates at certain intervals. The license plates pass through the chip recognition machine 2, which identifies the chip in the license plate and determines the painting process. The UV printing and curing machine 3 contains multiple painting devices that adaptively paint based on the identified license plate information. After painting, UV curing is performed, and the plates then enter the inspection area of ​​the inspection support plate 4 for inspection. Defective products are rejected by a set rejection component, while good products enter the discharge machine 5 for subsequent packaging.

[0020] Example 2 like Figure 4 As shown, based on Embodiment 1, in this embodiment, the detection conveying assembly further includes a conveying motor 6 fixedly installed on the top of the detection support plate 4. The bottom of the detection support plate 4 is rotatably connected to a driven conveying sprocket 62 and a driven conveying sprocket 63. The output end of the conveying motor 6 is connected to the driven conveying sprocket 63. A conveying chain 64 is sleeved and connected between the driven conveying sprocket 62 and the driven conveying sprocket 63. A conveying slide rail 60 is fixedly connected to the bottom of the conveying motor 6. Multiple transmission moving plates 65 are slidably arranged on the conveying slide rail 60. Fixed plates 61 are symmetrically fixedly connected between the transmission moving plates 65 and the conveying chain 64. In this design, since the license plates need to be removed without stopping the machine, the spacing between the two license plates needs to be determined by the paging machine 1 so that the detection component is facing the license plate and the removal component is located at the center of the two license plates. Furthermore, the detection and rejection components are distributed alternately. When a problem is detected with the license plate, the conveyor motor 6 stops rotating. After the license plate moves to the position aligned with the rejection component, the conveyor motor 6 is restarted. Through the transmission action of the driven sprocket 62, the driving sprocket 63, and the conveyor chain 64, the transmission moving plate 65 moves at the same speed as the license plate. Then, the rejection component at the bottom of the transmission moving plate 65 clamps the four sides of the license plate. After clamping is completed, the conveyor motor 6 speeds up, so that the detection component is aligned with the license plate again.

[0021] Furthermore, three temporary storage boxes are provided on the side of the detection support plate 4 to store defective products with different problems. When the rejection component moves to the other side of the detection support plate 4, the defective products are placed into the temporary storage boxes.

[0022] Each clamping support plate 10 or limiting cylinder 101 is fixedly connected to a single transmission moving plate 65, and the clamping support plate 10 and the limiting cylinder 101 are distributed alternately.

[0023] Example 3 like Figure 3 As shown, based on the above embodiments, in this embodiment, the detection support cabinet 7 is provided with a correction mechanism, which includes symmetrically arranged correction support plates 9. The correction support plates 9 are fixedly connected to the top of the detection support cabinet 7. Limiting slide rods 91 are fixedly connected between the two correction support plates 9. Limiting plates 92 are symmetrically slidably arranged between the two limiting slide rods 91. The two correction support plates 9 are rotatably connected to a bidirectional lead screw 93. The two limiting plates 92 are respectively threaded to the positive and negative threads of the bidirectional lead screw 93. A correction motor 90 is fixedly installed on the side of one correction support plate 9. The output end of the correction motor 90 is fixedly installed with the bidirectional lead screw 93. Furthermore, to improve the detection and rejection effect, when the license plate enters the feeding conveyor mechanism 8 (which is a belt conveyor to prevent lateral deviation of the license plate), the correction motor 90 is activated to drive the bidirectional lead screw 93 to rotate according to the size of the license plate. This causes the two limiting plates 92 to move synchronously towards each other under the action of the bidirectional lead screw 93, so that the inner sides of the two limiting plates 92 are close to the license plate but do not contact it. One end of the limiting plate 92 is tilted to one side, and the two limiting plates 92 are tilted in different directions, forming an expansion opening shape, which facilitates the license plate to enter between the two limiting plates 92. If the license plate is deviated, it will contact one of the limiting plates 92 and be restricted by the other limiting plate 92. As the license plate moves on the feeding conveyor mechanism 8, it is gradually corrected.

[0024] Example 4 like Figures 5-6As shown, based on the above embodiments, in this embodiment, the detection component further includes a light source 1100 fixedly connected to the inner side of the detection support frame 11, and a lens-changing driven sprocket 1104 fixedly connected to one end of each of the two filter plates 1103 extending to the inner side of the detection support frame 11. A reversing gear 1105 meshing with each other is symmetrically rotatably connected to the inner side of the detection support frame 11. A lens-changing driving sprocket 1106 is fixedly connected to the top of each of the reversing gears 1105. A lens-changing chain 1107 is sleeved and connected between the lens-changing driving sprocket 1106 and the lens-changing driven sprocket 1104.

[0025] The inner side of each mounting slot 1109 is equipped with a different filter. The two overlapping filters are different to form a single light environment. Under the single light environment, the detection head 1102 performs detection. Furthermore, most license plates currently have anti-counterfeiting features that can only be identified under specific lighting conditions. The filter plate 1103 has three mounting slots 1109 arranged in a circular array. Filters are installed in the mounting slots 1109. The filters are infrared filters, ultraviolet filters, and visible light filters. The two overlapping filters are different. Furthermore, since the two filter plates 1103 are overlapped and have different heights, specifically, an infrared light filter and an ultraviolet light filter are overlapped to form a single visible light environment; an infrared light filter and a visible light filter are overlapped to form a single ultraviolet light environment; and an ultraviolet light filter and a visible light filter are overlapped to form a single infrared light environment. The system detects defects in the text at the top of the license plate under visible light conditions, while infrared and ultraviolet light are used for anti-counterfeiting identification. A mirror-changing motor 1101 is fixedly connected to the inner side of the detection support frame 11. The output end of the mirror-changing motor 1101 is fixedly installed with a mirror-changing drive sprocket 1106. A detection head 1102 is fixedly connected to the inner side of the detection support frame 11. A fan blade 1108 is fixedly connected to a reversing gear 1105. The center of the fan blade 1108 is located on the arc of the running trajectory of the mounting groove 1109. Furthermore, during use, the light source 1100 uses a tungsten bromide lamp. When the lens-changing motor 1101 is started, the two reversing gears 1105 engage, causing them to rotate in opposite directions while maintaining the same speed. Through the transmission action of the lens-changing drive sprocket 1106 and lens-changing chain 1107 at their respective tops, the lens-changing driven sprocket 1104 is driven to rotate, thereby rotating the filter plate 1103. Since the two filter plates 1103 rotate in opposite directions, the three filter arrangements on the filter plate 1103 are as follows: starting from the overlapping point of the two mounting slots 1109, the top filter plate 1103 is arranged clockwise with an infrared filter, an ultraviolet filter, and a visible light filter; the bottom filter plate 1103 is arranged clockwise with a visible light filter, an infrared filter, and an ultraviolet filter. Furthermore, while the two reversing gears 1105 rotate, they drive the fan blades 1108 to rotate. At the same time, the filter in the mounting slot 1109 will pass through the fan blades 1108, thus achieving self-cleaning.

[0026] Example 5 like Figures 7-9 As shown, based on the above embodiments, in this embodiment, the rejection assembly also includes an adjustment motor 103 disposed inside the limiting cylinder 101. The adjustment motor 103 is fixed to the bottom of the transmission moving plate 65. An adjustment screw 104 is fixedly installed at the output end of the adjustment motor 103. A moving cylinder 102 is threadedly connected to the adjustment screw 104. The moving cylinder 102 is slidably disposed inside the limiting cylinder 101. The moving cylinder 102 is fixedly connected to the clamping support plate 10. Furthermore, when clamping defective products, the conveyor motor 6 needs to stop rotating, the license plate moves to the bottom of the clamping support plate 10, and then the conveyor motor 6 is driven again to keep the clamping support plate 10 and the license plate moving synchronously and remaining relatively stationary. Then the adjusting motor 103 is driven, and the adjusting motor 103 drives the adjusting screw 104 to rotate, so that the moving cylinder 102 moves under the limiting action of the limiting cylinder 101, moving the clamping support plate 10 closer to the license plate.

[0027] A first clamping motor 105 is fixedly connected to the inner side of the movable cylinder 102. A rotating arm 109 is fixedly connected to the output end of the first clamping motor 105 extending to the bottom of the clamping support plate 10. Both ends of the rotating arm 109 are rotatably connected to clamping arms 106. Guide rails 108 are symmetrically fixedly connected to the bottom of the clamping support plate 10. The clamping movable plate 107 slides relative to the two guide rails 108. The other end of the clamping arm 106 is rotatably connected to the clamping movable plate 107.

[0028] Furthermore, since there is text on the top of the license plate, it is inconvenient to use a cylinder-driven suction cup for clamping. When the clamping support plate 10 moves to a set height, which is a fixed value set according to the size of the license plate, it drives the first clamping motor 105. The first clamping motor 105 drives the rotating arm 109 to rotate. The rotating arm 109 and the clamping arm 106 form a linkage mechanism. The clamping arms 106 at both ends retract as the rotating arm 109 rotates, and the acute angle between them and the rotating arm 109 becomes smaller, so that the two clamping moving plates 107 move closer to each other, so that the right angle clamping plate 114 clamps the two sides of the license plate.

[0029] A second clamping motor 110 is fixedly installed on the outer side of the clamping moving plate 107. A bidirectional clamping screw 111 is fixedly installed at the output end of the second clamping motor 110. The bidirectional clamping screw 111 is rotatably connected to the clamping moving plate 107. Threaded moving frames 112 are symmetrically slidably arranged at the bottom of the clamping moving plate 107. The two threaded moving frames 112 are respectively threaded to the positive and negative threads of the bidirectional clamping screw 111. A right-angle clamping plate 114 is fixedly connected to the bottom of the threaded moving frame 112. Rubber pads 113 are symmetrically fixedly connected to the two right-angled sidewalls of the right-angle clamping plate 114.

[0030] Furthermore, the other two sides of the license plate are then clamped. Before this, two second clamping motors 110 need to be synchronously controlled and driven. The second clamping motors 110 drive the bidirectional clamping screws 111 to rotate, so that the two threaded moving frames 112 move closer or further away from each other to adapt to different sizes. However, the right-angle clamping plate 114 leaves a certain gap from the other sides. During the clamping process, the two second clamping motors 110 are driven to make the two right-angle clamping plates 114 move closer to each other to clamp the other two sides of the license plate.

[0031] 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 recognition-based license plate UV inkjet printing detection device, comprising a detection support cabinet (7), wherein a detection support plate (4) is installed on one side of the detection support cabinet (7), and a feeding and conveying mechanism (8) is installed on the top of the detection support cabinet (7), characterized in that, The detection conveying assembly is located at the bottom of the detection support plate (4) and includes multiple movable transmission moving plates (65). The output end of the detection and conveying assembly is provided with alternating detection components and rejection components. The detection component includes a fixed detection support frame (11). The bottom of the detection support frame (11) is symmetrically rotatably connected to a filter plate (1103). The filter plate (1103) has multiple mounting slots (1109) arranged in a circular array. The bottom of the detection support frame (11) is symmetrically rotatably connected to a fan blade (1108). The mounting slots (1109) of two filter plates (1103) overlap to form different light environments. The rejection assembly includes a fixed limiting cylinder (101), a clamping support plate (10) is movably provided at the bottom of the limiting cylinder (101), a clamping moving plate (107) is symmetrically provided at the bottom of the clamping support plate (10) and a right-angle clamping plate (114) is symmetrically provided at the bottom of the clamping moving plate (107) and a right-angle clamping plate (114) is symmetrically provided at the bottom of the clamping moving plate (107).

2. The license plate UV inkjet printing detection device based on vision recognition according to claim 1, characterized in that, The detection conveying assembly also includes a conveying motor (6) fixedly installed on the top of the detection support plate (4). The bottom of the detection support plate (4) is rotatably connected to a driven conveying sprocket (62) and a driven conveying sprocket (63). The output end of the conveying motor (6) is connected to the driven conveying sprocket (63) for transmission. A conveying chain (64) is sleeved between the driven conveying sprocket (62) and the driven conveying sprocket (63). A conveying slide rail (60) is fixedly connected to the bottom of the conveying motor (6). A plurality of the transmission moving plates (65) are slidably arranged on the conveying slide rail (60). A fixing plate (61) is symmetrically fixedly connected between the transmission moving plate (65) and the conveying chain (64).

3. The license plate UV inkjet printing detection device based on vision recognition according to claim 2, characterized in that, Each of the clamping support plate (10) and the limiting cylinder (101) is fixedly connected to a single transmission moving plate (65), and the clamping support plate (10) and the limiting cylinder (101) are distributed alternately.

4. The license plate UV inkjet printing detection device based on vision recognition according to claim 1, characterized in that, The testing support cabinet (7) is provided with a correction mechanism, which includes symmetrically arranged correction support plates (9). The correction support plates (9) are fixedly connected to the top of the testing support cabinet (7). A limit slide rod (91) is fixedly connected between the two correction support plates (9). A limit plate (92) is symmetrically slidably arranged between the two limit slide rods (91). The two correction support plates (9) are rotatably connected to a bidirectional lead screw (93). The two limit plates (92) are respectively threaded to the positive and negative threads of the bidirectional lead screw (93). A correction motor (90) is fixedly installed on the side of one of the correction support plates (9). The output end of the correction motor (90) is fixedly installed with the bidirectional lead screw (93).

5. The license plate UV inkjet printing detection device based on vision recognition according to claim 1, characterized in that, The detection assembly also includes a light source (1100) fixedly connected to the inside of the detection support frame (11). One end of each of the two filter plates (1103) extending to the inside of the detection support frame (11) is fixedly connected to a lens-changing driven sprocket (1104). The inside of the detection support frame (11) is symmetrically rotatably connected to a reversing gear (1105) that meshes with each other. The top of each reversing gear (1105) is fixedly connected to a lens-changing driving sprocket (1106). A lens-changing chain (1107) is sleeved and connected between the lens-changing driving sprocket (1106) and the lens-changing driven sprocket (1104).

6. The license plate UV inkjet printing detection device based on vision recognition according to claim 5, characterized in that, The inner side of the detection support frame (11) is fixedly connected to a mirror changing motor (1101). The output end of the mirror changing motor (1101) is fixedly installed with a mirror changing drive sprocket (1106). The inner side of the detection support frame (11) is fixedly connected to a detection head (1102). The fan blade (1108) is fixedly connected to the reversing gear (1105). The center of the fan blade (1108) is located on the arc of the running trajectory of the mounting groove (1109).

7. The license plate UV inkjet printing detection device based on vision recognition according to claim 1, characterized in that, The inner side of each mounting slot (1109) is provided with a different filter, and the two overlapping filters are different to form a single light environment.

8. The license plate UV inkjet printing detection device based on vision recognition according to claim 1, characterized in that, The rejection assembly also includes an adjustment motor (103) disposed inside the limiting cylinder (101). The adjustment motor (103) is fixed to the bottom of the transmission moving plate (65). An adjustment screw (104) is fixedly installed at the output end of the adjustment motor (103). A moving cylinder (102) is threadedly connected to the adjustment screw (104). The moving cylinder (102) is slidably disposed inside the limiting cylinder (101).

9. A license plate UV inkjet printing detection device based on visual recognition according to claim 8, characterized in that, The movable cylinder (102) is fixedly connected to the clamping support plate (10). A first clamping motor (105) is fixedly connected to the inner side of the movable cylinder (102). A rotating arm (109) is fixedly connected to the output end of the first clamping motor (105) extending to the bottom of the clamping support plate (10). Both ends of the rotating arm (109) are rotatably connected to clamping arms (106). Guide rails (108) are symmetrically fixedly connected to the bottom of the clamping support plate (10). The clamping movable plate (107) slides relative to the two guide rails (108). The other end of the clamping arm (106) is rotatably connected to the clamping movable plate (107).

10. A license plate UV inkjet printing detection device based on vision recognition according to claim 9, characterized in that, A second clamping motor (110) is fixedly installed on the outer side of the clamping moving plate (107). A bidirectional clamping screw (111) is fixedly installed at the output end of the second clamping motor (110). The bidirectional clamping screw (111) is rotatably connected to the clamping moving plate (107). A threaded moving frame (112) is symmetrically slidably arranged at the bottom of the clamping moving plate (107). The two threaded moving frames (112) are respectively threaded to the positive and negative threads of the bidirectional clamping screw (111). The right-angle clamping plate (114) is fixedly connected to the bottom of the threaded moving frame (112). Rubber pads (113) are symmetrically fixedly connected to the two right-angle sidewalls of the right-angle clamping plate (114).

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