Packaging surface defect multi-view visual detection device and testing method

Abstract

The invention relates to the technical field of packaging surface defect detection equipment, in particular to a packaging surface defect multi-view visual detection device and a testing method.The packaging surface defect multi-view visual detection device comprises a workbench, a bearing table, a visual detection assembly, a grabbing assembly and a feeding and discharging conveying table; the center and the peripheral side of a top plate of the visual inspection assembly are provided with first image acquisition assemblies, images can be captured from multiple visual angles and transmitted to image processing equipment for defect identification, the grabbing assembly realizes automatic transfer of the PCB between the conveying table and the bearing table, the detection method comprises the stages of preparation, feeding, detection and discharging, actions of all the components are coordinated through the control case, and the detection efficiency is improved. The device is suitable for PCBs of different specifications, achieves full-automatic detection, improves the defect recognition rate through multi-view collection, reduces the labor cost and the secondary damage risk, and is suitable for surface defect detection of packaged PCBs in batches.

Description

Technical Field

[0001] This invention relates to the field of packaging surface defect detection equipment technology, specifically to a multi-view visual inspection device and testing method for packaging surface defects. Background Technology

[0002] In the production process of rectangular PCB boards, after the packaging stage (such as applying conformal coating and installing the casing), it is necessary to conduct strict inspections on defects such as residual solder joints, scratches, and missing components to ensure their electrical performance and reliability.

[0003] Traditional testing methods rely on manual loading and unloading. Workers need to place each PCB board at the testing station and then manually remove and classify them after testing. This method is not only inefficient and difficult to adapt to the testing needs of batch PCB boards, but it is also prone to missed or incorrect inspections due to fatigue or negligence of manual operation. At the same time, frequent contact with PCB boards may cause secondary contamination or physical damage, affecting product quality. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a multi-view visual inspection device and testing method for packaging surface defects.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-view visual inspection device for packaging surface defects, comprising a worktable, a control box, and an image processing device, wherein the image processing device is located on one side of the worktable, a support platform is provided at the upper end of the worktable, a visual inspection component is provided above the support platform, a gripping component is provided at the upper end of the worktable, and a feeding conveyor and a discharging conveyor are respectively symmetrically arranged on the upper end of the worktable gripping components, and a baffle is provided at the rear end of the feeding conveyor.

[0008] The support platform is provided with a plurality of first sliding grooves and a first negative pressure suction cup, and the lower end of the first negative pressure suction cup is provided with a first slider that is slidably connected to the first sliding groove.

[0009] The visual inspection component includes a top plate, an image acquisition module at the upper end of the top plate, a first image acquisition component at the center of the lower end of the top plate, and multiple second image acquisition components on the periphery of the lower end of the top plate. The second image acquisition components are slidably connected to the top plate. Multiple limiting frames are provided on the periphery of the top plate, and a pushing component is provided on the outer side of the limiting frame. The output end of the pushing component is provided with a drive rod connected to the second image acquisition components. The first image acquisition component and the second image acquisition components are all connected to the image acquisition module via electrical signals.

[0010] The gripping assembly includes a fixed frame, a second lifting assembly, a base, a drive motor, and a second negative pressure suction cup. The fixed frame is fixed to the rear end of the support platform and has a placement slot inside. The second lifting assembly is installed inside the placement slot. The base is fixed to the output end of the second lifting assembly. The drive motor is fixed to the upper end of the base and has a top seat at the output end. A crossbar is provided on one side of the top seat. The second negative pressure suction cup is fixed to one end of the crossbar, and the base is slidably connected to the placement slot.

[0011] To facilitate the adjustment of the position of the first image acquisition component, the present invention includes an improvement in which the lower end of the top plate is provided with a plurality of second sliding grooves, and the upper end of the second image acquisition component is provided with a second slider that is slidably connected to the second sliding grooves.

[0012] To facilitate the adjustment of the positions of the multiple first negative pressure suction cups, the present invention includes the following improvements: the support platform is fixed above the worktable by multiple support rods; the upper end of the worktable is provided with a first lifting assembly, which is located below the support platform; the output end of the first lifting assembly is provided with a lifting block; multiple drive rods are provided around the lifting block; the lower end of the first slider is provided with a positioning frame; the top end of the drive rod is hinged to the positioning frame; and the bottom end of the drive rod is hinged to the lifting block.

[0013] Furthermore, an improvement of the present invention is that the propulsion assembly, the first lifting assembly, and the drive motor all adopt electric lifting rods.

[0014] Furthermore, an improvement of the present invention is that the first image acquisition component and the second image acquisition component are identical, and both include a fill light and an image acquisition camera.

[0015] To improve the stability of the first negative pressure suction cup and the first image acquisition component during movement, the present invention includes the following improvement: multiple first sliding grooves are installed on the support platform in a cross-shaped structure, and the cross sections of the first sliding groove and the second sliding groove are rectangular.

[0016] A detection method for a multi-view visual inspection device for package surface defects includes the following steps:

[0017] Preparation phase: Activate the first lifting assembly and adjust the position of multiple first negative pressure suction cups on the support platform to adapt to the PCB board size; replace the loading and unloading conveyor platforms with the corresponding specifications according to the PCB board batch and fix them to the worktable with screws; activate the propulsion assembly and adjust the position of multiple second image acquisition components around the top plate; control each electrical component, first negative pressure suction cup and second negative pressure suction cup through the control chassis;

[0018] Material feeding stage: Batch of PCB boards are intermittently conveyed on the material feeding conveyor until they are intercepted by a baffle at one end; the second negative pressure suction cup descends from the initial position to adhere to the PCB board, starts suction and rises, is driven by the drive motor to rotate above the support platform, and then descends to place the PCB board on the first negative pressure suction cup, which starts suction to fix the PCB board.

[0019] Detection phase: The first image acquisition component at the center of the lower end of the top plate captures images of the PCB board, while multiple second image acquisition components on the periphery capture images from the periphery of the PCB board; the captured images are transmitted to the image processing equipment, and multi-view detection is completed after recognition and processing;

[0020] Unloading stage: The same gripping method as loading is used, and the second negative pressure suction cup grips the PCB board that has been inspected on the carrier platform and transfers it to the unloading conveyor.

[0021] Furthermore, improvements of the present invention include: during the preparation stage, the first lifting assembly and the propulsion assembly adjust the positions of the first negative pressure suction cup and the second image acquisition assembly by means of the extension and retraction of the electric lifting rod; the first slide groove has a cross-shaped structure and both the first slide groove and the second slide groove have rectangular cross sections, ensuring stable movement of the first negative pressure suction cup and the second image acquisition assembly;

[0022] During the detection phase, both the first and second image acquisition components are illuminated by supplementary lights, and the image acquisition camera captures the images to ensure image clarity.

[0023] (III) Beneficial Effects

[0024] Compared with the prior art, the present invention provides a multi-view visual inspection device and testing method for package surface defects, which has the following beneficial effects:

[0025] Fully automated operation improves inspection efficiency:

[0026] It replaces the traditional manual feeding and unloading mode, and realizes continuous inspection of PCB boards through batch conveying of the feeding conveyor and automated transfer of gripping components, which greatly reduces labor costs and improves inspection efficiency several times over compared with manual methods, especially suitable for large-scale production needs.

[0027] Multi-view detection reduces false negative and false positive rates:

[0028] The central first image acquisition component and the peripheral second image acquisition component work together to cover the PCB board surface and edges from multiple angles, including vertical and lateral views. By combining high-definition image acquisition with algorithm recognition, it can accurately capture minute defects, avoid missed or incorrect inspections caused by fatigue from manual visual inspection, and improve the accuracy of product quality control.

[0029] Flexible adaptation to various sheet sizes, enhancing versatility:

[0030] The adjustable design of the first negative pressure suction cup and the second image acquisition component, together with the replaceable conveyor, can quickly adapt to the inspection needs of PCB boards of different sizes and batches without replacing the entire set of equipment, reducing equipment investment costs and improving the flexibility of the production line. Attached Figure Description

[0031] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a second-view three-dimensional structural diagram of the present invention;

[0033] Figure 3 This is a schematic diagram of the third-view three-dimensional structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the fourth-view three-dimensional structure of the present invention;

[0035] Figure 5 For the present invention Figure 1 Side view;

[0036] Figure 6 For the present invention Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0037] In the diagram: 1. Workbench; 2. Support platform; 3. Top plate; 4. First image acquisition component; 5. Limiting frame; 6. Propulsion component; 7. Second image acquisition component; 8. First slide rail; 9. First negative pressure suction cup; 10. First slider; 11. Positioning frame; 12. First lifting component; 13. Lifting block; 14. Second negative pressure suction cup; 15. Fixing frame; 16. Second lifting component; 17. Base; 18. Drive motor; 19. Top seat; 20. Crossbar; 21. Loading conveyor; 22. Unloading conveyor; 23. Control box; 24. Baffle; 25. Image processing equipment; 26. Drive rod. Detailed Implementation

[0038] 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.

[0039] Please see Figures 1-6The present invention provides a multi-view visual inspection device for surface defects of packaging, including a workbench 1, a control box 23 and an image processing device 25. The image processing device 25 is located on one side of the workbench 1. The upper end of the workbench 1 is provided with a support platform 2. A visual inspection component is provided above the support platform 2. The upper end of the workbench 1 is provided with a gripping component. The gripping components on the upper end of the workbench 1 are symmetrically provided with a feeding conveyor 21 and a discharging conveyor 22. A baffle 24 is provided at the rear end of the feeding conveyor 21.

[0040] The support platform 2 is provided with a plurality of first sliding grooves 8 and a first negative pressure suction cup 9. The lower end of the first negative pressure suction cup 9 is provided with a first slider 10 that is slidably connected to the first sliding groove 8.

[0041] The visual inspection component includes a top plate 3, an image acquisition module at the upper end of the top plate 3, a first image acquisition component 4 at the center of the lower end of the top plate 3, a plurality of second image acquisition components 7 on the periphery of the lower end of the top plate 3, the second image acquisition components 7 being slidably connected to the top plate 3, a plurality of limiting frames 5 on the periphery of the top plate 3, a pushing component 6 on the outer side of the limiting frame 5, and a driving rod 26 connected to the second image acquisition components 7 at the output end of the pushing component 6. The first image acquisition component 4 and the second image acquisition components 7 are all connected to the image acquisition module via electrical signals.

[0042] The gripping assembly includes a fixed frame 15, a second lifting assembly 16, a base 17, a drive motor 18, and a second negative pressure suction cup 14. The fixed frame 15 is fixed to the rear end of the support platform 2. The fixed frame 15 has a placement slot. The second lifting assembly 16 is installed inside the placement slot. The base 17 is fixed to the output end of the second lifting assembly 16. The drive motor 18 is fixed to the upper end of the base 17. The output end of the drive motor 18 has a top seat 19. A crossbar 20 is provided on one side of the top seat 19. The second negative pressure suction cup 14 is fixed to one end of the crossbar 20, and the base 17 is slidably connected to the placement slot.

[0043] The lower end of the top plate 3 is provided with a plurality of second sliding grooves, and the upper end of the second image acquisition component 7 is provided with a second slider that is slidably connected to the second sliding grooves.

[0044] The support platform 2 is fixed above the workbench 1 by multiple support rods. The upper end of the workbench 1 is provided with a first lifting assembly 12, which is located below the support platform 2. The output end of the first lifting assembly 12 is provided with a lifting block 13. Multiple drive rods 26 are provided around the lifting block 13. The lower end of the first slider 10 is provided with a positioning frame 11. The top end of the drive rod 26 is hinged to the positioning frame 11, and the bottom end of the drive rod 26 is hinged to the lifting block 13.

[0045] The propulsion assembly 6, the first lifting assembly 12, and the drive motor 18 all adopt electric lifting rods.

[0046] The first image acquisition component 4 and the second image acquisition component 7 are identical, and both include a fill light and an image acquisition camera.

[0047] A detection method for a multi-view visual inspection device for package surface defects includes the following steps:

[0048] Preparation phase: Activate the first lifting assembly 12, adjust the positions of multiple first negative pressure suction cups 9 on the support platform 2 to adapt to the PCB board size; replace the loading conveyor 21 and unloading conveyor 22 with the corresponding specifications according to the PCB board batch, and fix them to the workbench 1 with screws; activate the propulsion assembly 6, adjust the positions of multiple second image acquisition assemblies 7 on the periphery of the top plate 3; control each electrical component, the first negative pressure suction cup 9 and the second negative pressure suction cup 14 through the control chassis 23;

[0049] Material feeding stage: Batch of PCB boards are intermittently conveyed on the material feeding conveyor 21 until they are intercepted by the baffle 24 at one end; the second negative pressure suction cup 14 descends from the initial position to adhere to the PCB board, and rises after starting suction. It is driven by the drive motor 18 to rotate above the support platform 2, and then descends to place the PCB board on the first negative pressure suction cup 9. The first negative pressure suction cup 9 starts to suction and fix the PCB board.

[0050] Detection phase: The first image acquisition component 4 at the center of the lower end of the top plate 3 captures images of the PCB board, while multiple second image acquisition components 7 on the periphery capture images from the periphery of the PCB board; the captured images are transmitted to the image processing device 25, and multi-view detection is completed after recognition processing;

[0051] Unloading stage: Using the same gripping method as loading, the second negative pressure suction cup 14 grips the PCB board that has been inspected on the carrier platform 2 and moves it to the unloading conveyor platform 22.

[0052] Furthermore, the improvements of the present invention include the following: during the preparation stage, the first lifting component 12 and the propulsion component 6 adjust the positions of the first negative pressure suction cup 9 and the second image acquisition component 7 by means of the extension and retraction of the electric lifting rod; the first slide 8 has a cross-shaped structure and both the first slide 8 and the second slide 8 have rectangular cross sections, ensuring stable movement of the first negative pressure suction cup 9 and the second image acquisition component 7.

[0053] During the detection phase, both the first image acquisition component 4 and the second image acquisition component 7 are illuminated by supplementary lights, and the image acquisition camera captures the images to ensure image clarity.

[0054] This multi-view visual inspection device for surface defects in PCBs achieves efficient inspection of PCBs through an automated process. The specific workflow is as follows:

[0055] Equipment commissioning and preparation:

[0056] Activate the first lifting component 12, which drives the lifting block 13 and drive rod 26 below the support platform 2 to slide the first negative pressure suction cup 9 along the cross-shaped first slide groove 8 and adjust it to a position that matches the size of the PCB board to be tested, ensuring stable adsorption of PCB boards of different specifications.

[0057] Replace the loading conveyor 21 and unloading conveyor 22 with the corresponding specifications according to the specific size of the batch of PCB boards, and fix them to the workbench 1 with screws to ensure conveying compatibility.

[0058] Start the propulsion component 6 to push the second image acquisition component 7 on the periphery of the top plate 3 to slide along the second slide groove, adjust to the optimal angle to cover the detection range of the PCB board, and complete the parameter calibration before detection.

[0059] The control chassis 23 synchronously starts all electrical components to ensure that the first negative pressure suction cup 9, the second negative pressure suction cup 14, and the image acquisition equipment are in a ready state. The control chassis 23 controls each electrical component and suction cup based on the logic of "signal command transmission - action timing coordination - status feedback adjustment". It achieves precise control through integrated control modules. The specific principle is as follows:

[0060] Control of electric drive components:

[0061] The control box 23 controls the first lifting assembly 12, the propulsion assembly 6, the drive motor 18, and other electric lifting rod components by outputting electrical signals (such as DC voltage or pulse signals).

[0062] The control box 23 controls the adsorption and release of the first negative pressure suction cup 9 and the second negative pressure suction cup 14 through an integrated negative pressure control unit (such as a solenoid valve or a vacuum generator).

[0063] Multi-view image acquisition and detection:

[0064] The visual inspection components work synchronously: the first image acquisition component 4 at the center of the top plate 3 captures the PCB board surface vertically, while multiple second image acquisition components 7 on the periphery capture the edges and sides of the board from different angles.

[0065] The supplemental lighting provides uniform illumination, ensuring that the image acquisition camera captures high-definition images and detects minor defects such as solder joint residue, scratches, and missing components.

[0066] The captured images are transmitted to the image processing device 25 in real time. The algorithm is used to identify, classify and judge defects, and complete multi-dimensional detection. The detection results are displayed on the image processing device 25. When the detection is qualified, the system runs automatically and the material is unloaded normally. When the detection is unqualified, the system stops running, the staff removes the unqualified products, and then resets the system to carry out the subsequent normal material loading work.

[0067] Post-inspection material unloading and transfer:

[0068] After the inspection is completed, the second negative pressure suction cup 14 operates in reverse order of the loading process: it picks up the PCB board from the support platform 2, and through the rotation of the drive motor 18, it is transferred to the unloading conveyor platform 22. The suction is released, allowing the board to flow out with the conveyor platform, realizing automated circulation after inspection. The entire process requires no manual intervention, forming a closed-loop operation of "loading-inspection-unloading".

[0069] Multiple first slide grooves 8 are installed on the support platform 2 in a cross-shaped structure, and the cross sections of the first slide grooves 8 and the second slide grooves are rectangular;

[0070] The cross-shaped first slide groove 8 and the rectangular cross-section second slide groove ensure that the first negative pressure suction cup 9 and the second image acquisition component 7 move smoothly, reducing the impact of vibration on detection accuracy; the negative pressure adsorption method avoids secondary pollution or physical damage caused by manual contact, ensuring the cleanliness and integrity of the PCB board surface.

[0071] The control chassis 23 enables centralized control of all components through an automated process. Operators only need to complete the initial parameter settings to enable the equipment to operate autonomously, reducing operational difficulty and training costs. At the same time, through digital image processing, it facilitates the traceability and analysis of defect data, helping to optimize the production process.

[0072] Both the first negative pressure suction cup 9 and the second negative pressure suction cup 14 are industrial pneumatic vacuum suction cups (such as PU material suction cups). The diameter is adapted according to the size of the PCB board (commonly 20-50mm); the vacuum degree is -40kPa to -80kPa; the adsorption force is ≥5N (to ensure stable adsorption of the PCB board); the material is polyurethane (wear-resistant, flexible, and avoids scratching the board).

[0073] Propulsion component 6 uses a small electric actuator with a stroke of 50-150mm, a load capacity of ≥30N, a speed of 5-30mm / s, and a power supply of DC24V.

[0074] The drive motor 18 is a servo motor (with reducer) with a power of 50-100W, a speed of 300-1000r / min, a power supply of AC220V or DC24V, and a positioning accuracy of ±0.1° (to ensure accurate transfer position).

[0075] The second lifting assembly 16 uses a miniature electric lifting rod with a stroke of 80-200mm, a load of ≥40N, a speed of 8-40mm / s, and a power supply of DC24V.

[0076] The supplemental lighting uses a machine vision ring light source with an illuminance of 1000-5000 lux, a color temperature of 5000-6500K (white light, suitable for image acquisition), a power supply of DC12V / 24V, and a control method of constant illumination or trigger-activated operation.

[0077] The image acquisition camera uses an industrial area array camera with a resolution of 2-5 megapixels, a frame rate of ≥15fps, an interface of USB 3.0 or GigE, and a spectral range of visible light (400-700nm).

[0078] The controller inside the control box 23 is a PLC controller (such as a small programmable controller), with ≥16 input / output points; programming language: ladder diagram / instruction list; power supply: AC220V; and supports communication with image acquisition equipment.

[0079] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0080] 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.

Claims

1. A multi-view visual inspection device for surface defects in packaging, comprising a worktable (1), a control chassis (23), and an image processing device (25), wherein the image processing device (25) is located on one side of the worktable (1), characterized in that: The upper end of the workbench (1) is provided with a support platform (2), and a vision inspection component is provided above the support platform (2). The upper end of the workbench (1) is provided with a gripping component, and the upper end of the workbench (1) is symmetrically equipped with a feeding conveyor (21) and a discharging conveyor (22). The rear end of the feeding conveyor (21) is provided with a baffle (24). The support platform (2) is provided with a plurality of first sliding grooves (8) and a first negative pressure suction cup (9). The lower end of the first negative pressure suction cup (9) is provided with a first slider (10) that is slidably connected to the first sliding groove (8). The visual inspection component includes a top plate (3), an image acquisition module is provided at the upper end of the top plate (3), a first image acquisition component (4) is provided at the center of the lower end of the top plate (3), a plurality of second image acquisition components (7) are provided on the periphery of the lower end of the top plate (3), the second image acquisition components (7) are slidably connected to the top plate (3), a plurality of limit frames (5) are provided on the periphery of the top plate (3), a push component (6) is provided on the outer side of the limit frame (5), and a drive rod (26) is provided at the output end of the push component (6) to connect to the second image acquisition component (7). The first image acquisition component (4) and the second image acquisition component (7) are all connected to the image acquisition module by electrical signals. The gripping assembly includes a fixed frame (15), a second lifting assembly (16), a base (17), a drive motor (18), and a second negative pressure suction cup (14). The fixed frame (15) is fixed to the rear end of the support platform (2). The fixed frame (15) has a placement slot. The second lifting assembly (16) is installed inside the placement slot. The base (17) is fixed to the output end of the second lifting assembly (16). The drive motor (18) is fixed to the upper end of the base (17). The output end of the drive motor (18) has a top seat (19). A crossbar (20) is provided on one side of the top seat (19). The second negative pressure suction cup (14) is fixed to one end of the crossbar (20), and the base (17) is slidably connected to the placement slot.

2. The multi-view visual inspection device for packaging surface defects according to claim 1, characterized in that: The lower end of the top plate (3) is provided with a plurality of second sliding grooves, and the upper end of the second image acquisition component (7) is provided with a second slider that is slidably connected to the second sliding grooves.

3. The multi-view visual inspection device for packaging surface defects according to claim 2, characterized in that: The support platform (2) is fixed above the workbench (1) by multiple support rods. The upper end of the workbench (1) is provided with a first lifting assembly (12). The first lifting assembly (12) is located below the support platform (2). The output end of the first lifting assembly (12) is provided with a lifting block (13). Multiple drive rods (26) are provided around the lifting block (13). The lower end of the first slider (10) is provided with a positioning frame (11). The top end of the drive rod (26) is hinged to the positioning frame (11), and the bottom end of the drive rod (26) is hinged to the lifting block (13).

4. The multi-view visual inspection device for packaging surface defects according to claim 3, characterized in that: The propulsion assembly (6), the first lifting assembly (12), and the drive motor (18) all adopt electric lifting rods.

5. The multi-view visual inspection device for packaging surface defects according to claim 4, characterized in that: The first image acquisition component (4) and the second image acquisition component (7) are identical, and both include a fill light and an image acquisition camera.

6. The multi-view visual inspection device for packaging surface defects according to claim 5, characterized in that: Multiple first slides (8) are installed on the support platform (2) in a cross-shaped structure, and the cross sections of the first slides (8) and the second slides are rectangular.

7. A detection method for a multi-view visual inspection device for package surface defects, used to implement any one of the multi-view visual inspection devices for package surface defects according to claims 1-6, characterized in that: The following steps are included: Preparation stage: Start the first lifting assembly (12), adjust the position of multiple first negative pressure suction cups (9) on the support platform (2) to adapt to the PCB board size; replace the corresponding specifications of the loading conveyor (21) and unloading conveyor (22) according to the PCB board batch, and fix them to the workbench (1) with screws; start the propulsion assembly (6), adjust the position of multiple second image acquisition assemblies (7) around the top plate (3); control each electrical component, the first negative pressure suction cup (9) and the second negative pressure suction cup (14) through the control box (23); Material feeding stage: Batch of PCB boards are intermittently conveyed on the material feeding conveyor (21) until they are intercepted by a baffle (24) at one end; The second negative pressure suction cup (14) descends from its initial position to adhere to the PCB board. After starting suction, it rises and is driven by the drive motor (18) to rotate above the support platform (2). Then it descends to place the PCB board on the first negative pressure suction cup (9). The first negative pressure suction cup (9) starts to suction and fix the PCB board. Detection stage: The first image acquisition component (4) at the center of the lower end of the top plate (3) captures images of the PCB board, and multiple second image acquisition components (7) on the periphery capture images from the periphery of the PCB board; the captured images are transmitted to the image processing device (25), and multi-view detection is completed after recognition processing; Unloading stage: Using the same gripping method as loading, the second negative pressure suction cup (14) grips the PCB board that has been inspected on the carrier platform (2) and transfers it to the unloading conveyor platform (22).

8. The detection method of the multi-view visual inspection device for packaging surface defects according to claim 7, characterized in that: During the preparation phase, the first lifting assembly (12) and the propulsion assembly (6) adjust the positions of the first negative pressure suction cup (9) and the second image acquisition assembly (7) by extending and retracting the electric lifting rod; the first slide (8) has a cross-shaped structure and both the first and second slides have rectangular cross sections, ensuring that the first negative pressure suction cup (9) and the second image acquisition assembly (7) move stably; During the detection phase, both the first image acquisition component (4) and the second image acquisition component (7) are illuminated by supplementary lighting, and then the image acquisition camera captures the image to ensure image clarity.

Images