A circuit board visual inspection system and its visual inspection equipment

Abstract

This invention relates to the field of circuit board inspection technology, and in particular to a circuit board visual inspection system and its visual inspection equipment. The circuit board visual inspection system includes a main control module, a position sensing module, a conveying control unit, a clamping unit, an adjustment and flipping unit, and a visual inspection unit. The visual inspection equipment includes a cabinet and a controller located at the front of the cabinet. A belt conveyor is installed inside the cabinet, and multiple sets of clamping components for fixing circuit boards are provided on the top of the belt conveyor. Each set of adjustment components includes an inner ring and an outer ring located inside the cabinet, with the inner ring inside the outer ring, and a slide rail between the inner and outer rings. This invention is ingeniously designed, achieving automated operation and inspection, saving labor costs, reducing human error, and providing high reliability and stability. Furthermore, it enables the CCD camera to perform double-sided inspection of circuit boards, effectively improving the inspection efficiency and accuracy of this invention.

Description

Technical Field

[0001] This invention relates to the field of circuit board inspection technology, and more specifically to a circuit board visual inspection system and visual inspection equipment. Background Technology

[0002] Circuit boards (PCBs) are the supporting structure for electronic components and the carrier of electrical connections. They connect various electronic components through wires, ensuring the normal operation of electronic devices. PCBs play a crucial role in modern electronic devices and are widely used in computers, communication equipment, consumer electronics, and many other fields.

[0003] Circuit board visual inspection equipment, using high-precision industrial CCD cameras and advanced image processing software, can quickly identify and report various defects on circuit boards. As shown in the prior art published in CN219871079U, while this prior art enables orderly and automated inspection of products, effectively replacing manual labor while significantly improving inspection accuracy and effectively avoiding problems such as missed or mixed inspections, it can only inspect one side of the circuit board at a time. This necessitates two inspections of the circuit board, increasing inspection time and consequently affecting inspection efficiency. Summary of the Invention

[0004] To overcome the aforementioned deficiencies in the prior art, this invention provides a circuit board visual inspection system and its visual inspection equipment. Through the cooperation of the positioning component and the slide rail, the stability of the circuit board displacement driven by the electric push rod can be ensured. Then, by the engagement of the locking component and the positioning component, the positioning component can rotate together with the locking component, thereby driving the electric push rod to rotate the circuit board. This allows the CCD camera to perform double-sided inspection of the circuit board, effectively improving the inspection efficiency and accuracy of this invention, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides a circuit board visual inspection system, comprising a main control module, a position sensing module, a conveying control unit, a clamping unit, an adjustment and flipping unit, and a visual inspection unit. The position sensing module, conveying control unit, adjustment and flipping unit, and visual inspection unit are electrically connected to the main control module. The conveying control unit drives a belt conveyor to move the circuit board forward. The clamping unit drives a clamping assembly to fix the circuit board. The adjustment and flipping unit drives an adjustment assembly to rotate, thereby rotating the clamping assembly to flip the circuit board. The position sensing module senses the position of the circuit board and sends it to the main control module. When the position sensing module detects that the circuit board has reached the inspection station of the visual inspection unit, the visual inspection unit drives a CCD camera to descend to take a picture of the circuit board for inspection.

[0006] The circuit board visual inspection system further includes a wireless communication module, which is electrically connected to the main control module and is used to connect to a smart terminal.

[0007] The circuit board visual inspection system also includes an alarm module, which is electrically connected to the main control module.

[0008] The present invention also provides a circuit board visual inspection device, including a cabinet and a controller disposed on the front side of the cabinet. A belt conveyor is installed inside the cabinet, and multiple sets of clamping components for fixing circuit boards are provided on the top of the belt conveyor. Two sets of adjusting components for rotating the clamping components are provided inside the cabinet. Each adjusting component includes an inner ring and an outer ring disposed inside the cabinet, with the inner ring disposed inside the outer ring and a slide rail provided between the inner ring and the outer ring. The inner ring and the outer ring are provided with the same support member on the side away from the belt conveyor. The support member is installed on the top of the belt conveyor, and a motor is installed on the side of the support member near the belt conveyor. The output shaft of the motor is fitted with a U-shaped clamp. Openings are provided on the sides of the inner ring and the outer ring near the clamp, and the two ends of the clamp away from the support member extend into the two openings respectively.

[0009] Each clamping assembly includes two electric push rods mounted on top of the belt conveyor. Each electric push rod is fitted with a support base for connecting to the belt conveyor, and the inner wall of the support base is movably connected to the electric push rod via bearings. A U-shaped fixing component is installed at the end of each electric push rod that is close to each other, and a positioning component is installed at the end that is far apart from each other. The electric push rods drive the fixing components to clamp and fix the circuit board, ensuring its stability. Furthermore, the movable connection of the support base allows the electric push rods to rotate, facilitating subsequent rotation of the circuit board and enabling double-sided inspection.

[0010] The electric push rod has a reflector installed on the side closest to the support and furthest from the belt conveyor. The reflector, in conjunction with the infrared sensor, can determine the displacement position of the circuit board, thereby ensuring accurate detection by the CCD camera.

[0011] The belt conveyor is equipped with a mounting component at its top. Both ends of the mounting component are fixed to the inner wall of the cabinet. A hydraulic cylinder is installed at the bottom of the mounting component, and a CCD camera is installed at the bottom of the hydraulic cylinder. Infrared sensors are installed at the bottom of both ends of the mounting component. The infrared sensors are positioned vertically relative to one of the reflectors. The hydraulic cylinder drives the CCD camera to move downward to detect the circuit board. The contact between the infrared sensor and the reflector can detect the displacement of the electric push rod, thus ensuring the accuracy of the CCD camera's detection.

[0012] The inner and outer rings are each equipped with connectors on the side away from the belt conveyor to connect to the inner wall of the cabinet. These connectors limit the movement of the inner and outer rings, thereby ensuring their stability.

[0013] The cross-sections of the positioning component and the clamping component are both rectangular. By making the cross-sections of the positioning component and the clamping component rectangular, the clamping component can limit the positioning component and make the positioning component rotate together with the clamping component, thereby driving the electric push rod to rotate.

[0014] The cabinet has a feed inlet on the front and a discharge outlet at one end. The belt conveyor is located inside the discharge outlet. A controller is installed on the front of the cabinet. The circuit board is fed through the feed inlet and discharged through the discharge outlet. At the same time, the controller is used to operate and adjust the equipment inside the cabinet.

[0015] The technical effects and advantages of this invention are as follows: This invention is ingeniously designed. Through a circuit board vision inspection system, it achieves automated operation and inspection of the belt conveyor, clamping components, adjusting components, and CCD camera, saving labor costs, reducing human error, and ensuring high reliability and stability. Furthermore, the circuit board vision inspection equipment, through the cooperation of the positioning component and the slide rail, ensures the stability of the circuit board displacement driven by the electric push rod. Then, through the engagement of the locking component and the positioning component, the positioning component can rotate with the locking component, thereby driving the electric push rod to rotate the circuit board. This allows the CCD camera to perform double-sided inspection of the circuit board, effectively improving the inspection efficiency and accuracy of this invention. Through the matching and correspondence between the reflector and the infrared sensor, the displacement orientation of the circuit board can be determined, thereby ensuring the accuracy of the CCD camera's inspection of the circuit board and preventing misalignment. Attached Figure Description

[0016] Figure 1 This is a principle block diagram of Embodiment 1 of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0018] Figure 3 This is a front view of the belt conveyor according to Embodiment 2 of the present invention;

[0019] Figure 4 This is a bottom view of the mounting component according to Embodiment 2 of the present invention;

[0020] Figure 5 This is a front view of the inner ring of Embodiment 2 of the present invention;

[0021] Figure 6For the present invention Figure 5 Enlarged view of section A in the middle;

[0022] Figure 7 This is an exploded view of the support member according to Embodiment 2 of the present invention.

[0023] Appendix Figures 1 to 7 The tags include:

[0024] 100. Main control module; 200. Position sensing module; 300. Conveying control unit; 400. Clamping unit; 500. Adjustment and flipping unit; 600. Vision inspection unit; 700. Wireless communication module; 800. Alarm module; 1. Cabinet; 2. Belt conveyor; 3. Inner ring; 4. Outer ring; 5. Slide rail; 6. Support component; 7. Motor; 8. Clamping component; 9. Opening; 10. Electric push rod; 11. Support base; 12. Fixing component; 13. Positioning component; 14. Reflector component; 15. Mounting component; 16. Hydraulic cylinder; 17. CCD camera; 18. Infrared sensor; 19. Connecting component; 20. Feed inlet; 21. Discharge outlet; 22. Controller. Detailed Implementation

[0025] 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 protection scope of the present invention. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0026] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0027] It should also be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Example 1

[0029] Embodiment 1 of this application, as Figure 1 The diagram illustrates a circuit board visual inspection system, comprising a main control module, a position sensing module, a conveying control unit, a clamping unit, an adjustment and flipping unit, and a visual inspection unit. The position sensing module, conveying control unit, adjustment and flipping unit, and visual inspection unit are electrically connected to the main control module. The conveying control unit drives a belt conveyor to move the circuit board forward. The clamping unit drives a clamping assembly to fix the circuit board. The adjustment and flipping unit drives an adjustment assembly to rotate, thereby rotating the clamping assembly and flipping the circuit board. The position sensing module senses the position of the circuit board and sends it to the main control module. When the position sensing module detects that the circuit board has reached the inspection station of the visual inspection unit, the visual inspection unit drives a CCD camera to descend and photograph the circuit board. Specifically, under the above configuration, this embodiment of the application achieves automated operation and inspection of the belt conveyor, clamping assembly, adjustment assembly, and CCD camera through the circuit board visual inspection system. This simplifies the inspection and operation of circuit boards, saves labor costs, reduces human error, and ensures high reliability and stability.

[0030] In Embodiment 1 of this application, the circuit board visual inspection system further includes a wireless communication module, which is electrically connected to the main control module and is used to connect to a smart terminal. Specifically, with the above configuration, technicians can easily perform remote operation via a smart terminal, facilitating remote monitoring and control of the conveying control unit, clamping unit, adjustment and flipping unit, and visual inspection unit, making it flexible and convenient to use.

[0031] In Embodiment 1 of this application, the circuit board visual inspection system further includes an alarm module, which is electrically connected to the main control module. Specifically, when a shutdown or failure to detect a circuit board occurs during operation, the main control module triggers the alarm module to issue an alarm. The alarm module can be an audible and visual alarm. Alternatively, the main control module can also send signals to a technician on a smart terminal via a wireless communication module for timely operation.

[0032] Example 2

[0033] Embodiment 2 of this application, as follows Figures 2 to 6 The visual inspection equipment shown includes a cabinet 1 and a controller 22 located at the front of the cabinet 1. A belt conveyor 2 is installed inside the cabinet 1, and the top of the belt conveyor 2 is equipped with multiple sets of clamping components for fixing circuit boards; Figure 2 and 3 As shown, each clamping assembly includes two electric push rods 10 mounted on top of the belt conveyor 2. A support base 11 for connecting the belt conveyor 2 is fitted around each electric push rod 10, and the inner wall of the support base 11 is movably connected to the outside of the electric push rod 10 via bearings. A U-shaped fixing member 12 is installed at the end of each electric push rod 10 that is close to each other, and a positioning member 13 is installed on the side of each electric push rod 10 that is far apart from each other. The electric push rods 10 drive the fixing members 12 to clamp and fix the circuit board, thus ensuring the stability of the circuit board. Furthermore, the movable connection of the support base 11 allows the electric push rods 10 to rotate, facilitating subsequent rotation of the circuit board and achieving double-sided inspection.

[0034] In the second embodiment of this application, a reflector 14 is installed on the side of the electric push rod 10 that is close to the support member 6 and away from the belt conveyor 2, such as... Figure 3 , 5 As shown in Figure 7, the displacement position of the circuit board can be determined by the cooperation of the reflector 14 and the infrared sensor 18, thereby ensuring the accurate detection of the CCD camera 17. In Embodiment 2 of this application, the top of the belt conveyor 2 is provided with a mounting component 15, and both ends of the mounting component 15 are fixed to the inner wall of the cabinet 1, such as... Figure 3 and 4 As shown, a hydraulic cylinder 16 is installed at the bottom of the mounting component 15, and a CCD camera 17 is installed at the bottom of the hydraulic cylinder 16. Infrared sensors 18 are installed at the bottom of both the front and rear ends of the mounting component 15. The infrared sensors 18 are positioned vertically corresponding to one of the reflectors 14. The hydraulic cylinder 16 drives the CCD camera 17 to move down to detect the circuit board. The contact between the infrared sensor 18 and the reflector 14 can detect the displacement position of the electric push rod 10, thereby ensuring the detection accuracy of the CCD camera 17.

[0035] In Embodiment 2 of this application, to facilitate the flipping and adjustment of the circuit board, the cabinet 1 is equipped with two sets of adjustment components for rotating the clamping assembly; such as Figure 3 , 5 As shown in Figures 6 and 7, each set of adjustment components includes an inner ring 3 and an outer ring 4 located inside the cabinet 1. The inner ring 3 is located inside the outer ring 4, and a slide rail 5 is provided between the inner ring 3 and the outer ring 4. The inner ring 3 and the outer ring 4 are provided with the same support member 6 on the side away from the belt conveyor 2. The support member 6 is installed on the top of the belt conveyor 2. A motor 7 is installed on the side of the support member 6 near the belt conveyor 2, and a U-shaped clamp 8 is installed on the output shaft of the motor 7. An opening 9 is provided on the side of the inner ring 3 and the outer ring 4 near the clamp 8. The two ends of the clamp 8 away from the support member 6 extend into the two openings 9 respectively. The positioning member 13 is limited by the inner ring 3 and the outer ring 4, which can prevent the electric push rod 10 from rotating. At the same time, the clamp 8 can drive the positioning member 13 to rotate by setting the opening 9.

[0036] In the second embodiment of this application, both the inner ring 3 and the outer ring 4 are equipped with connectors 19 for connecting to the inner wall of the cabinet 1 on the side away from the belt conveyor 2. Figure 4 and 5 As shown, the inner ring 3 and the outer ring 4 are limited by the connector 19 to ensure the stability of the inner ring 3 and the outer ring 4.

[0037] In the second embodiment of this application, the cross-section of both the positioning member 13 and the clamping member 8 is set to rectangles, such as... Figure 6 and 7 As shown, by setting the cross-section of the positioning member 13 and the cross-section of the clamping member 8 to be rectangular, the clamping member 8 can limit the positioning member 13 and make the positioning member 13 rotate together with the clamping member 8, thereby driving the electric push rod 10 to rotate.

[0038] In the second embodiment of this application, a material inlet 20 is provided on the front side of the cabinet 1, and a material outlet 21 is provided at one end of the cabinet 1, such as... Figure 2 As shown, the belt conveyor 2 is located inside the discharge port 21, and the controller 22 is installed on the front side of the cabinet 1. The circuit board is conveyed through the inlet 20 and then discharged through the discharge port 21. At the same time, the controller 22 is used to operate and adjust the equipment in the cabinet 1.

[0039] In the second embodiment of this application, the circuit board is first placed on the belt conveyor 2 through the feed port 20. At the same time, the two electric push rods 10 drive the fixing member 12 to extend, thereby clamping and fixing the circuit board. Then, the electric push rods 10 drive the circuit board to move towards the CCD camera 17 with the operation of the belt conveyor 2. The electric push rods 10 stabilize the movement by limiting the positioning member 13 with the slide rail 5, thereby preventing the electric push rods 10 from rotating.

[0040] When the reflector 14 on the electric push rod 10 aligns with the infrared sensor 18, the hydraulic cylinder 16 drives the CCD camera 17 to move down and take a picture of the front of the circuit board. The positioning member 13 on the electric push rod 10 also moves into the clamp 8. The motor 7 drives the clamp 8 to rotate, and the clamp 8 drives the positioning member 13 to rotate. This drives the electric push rod 10 connected to the positioning member 13 and flips the circuit board to the back for the CCD camera 17 to take a picture. After the detection is completed, the positioning member 13 limits the electric push rod 10 moving with the belt conveyor 2 by the slide rail 5. This ensures the stability of the electric push rod 10 and enables double-sided detection. This allows the invention to detect the circuit board more comprehensively and effectively, improving detection efficiency.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A circuit board visual inspection device, characterized in that: The device includes a cabinet and a controller located on the front side of the cabinet. The controller is equipped with a circuit board visual inspection system. A belt conveyor is installed inside the cabinet, and the top of the belt conveyor is equipped with multiple sets of clamping components for fixing circuit boards. The circuit board vision inspection system includes a main control module, a position sensing module, a conveying control unit, a clamping unit, an adjustment and flipping unit, and a vision inspection unit. The position sensing module, conveying control unit, adjustment and flipping unit, and vision inspection unit are all electrically connected to the main control module. The conveying control unit drives the belt conveyor to move the circuit board forward. The clamping unit drives the clamping assembly to fix the circuit board. The adjustment and flipping unit drives the adjustment assembly to rotate, thereby rotating the clamping assembly to flip the circuit board. The position sensing module senses the position of the circuit board and sends it to the main control module. When the position sensing module detects that the circuit board has reached the inspection station of the vision inspection unit, the vision inspection unit drives the CCD camera to descend to take a picture of the circuit board for inspection. The cabinet is equipped with two sets of adjustment components for rotating the clamping assembly. Each set of adjustment components includes an inner ring and an outer ring located inside the cabinet, with the inner ring located inside the outer ring and a slide rail provided between the inner ring and the outer ring; The inner and outer rings are provided with the same support member on the side away from the belt conveyor. The support member is installed on the top of the belt conveyor. A motor is installed on the side of the support member close to the belt conveyor, and a U-shaped clamp is installed on the output shaft of the motor. Both the inner and outer rings have openings on the side close to the clamp. The two ends of the clamp away from the support member extend into the two openings respectively. Each clamping assembly includes two electric push rods mounted on top of the belt conveyor. The electric push rods are fitted with a support seat for connecting the belt conveyor, and the inner wall of the support seat is movably connected to the outside of the electric push rods via bearings. Both electric push rods have U-shaped fixing parts installed at their close ends, and positioning parts installed on their far ends. A reflector is installed on the side of the electric push rod that is close to the support and away from the belt conveyor; The belt conveyor is equipped with an installation component at the top, and both ends of the installation component are fixed to the inner wall of the cabinet. A hydraulic cylinder is installed at the bottom of the installation component, and a CCD camera is installed at the bottom of the hydraulic cylinder. Infrared sensors are installed at the bottom of both the front and rear ends of the mounting component, and the infrared sensors are positioned vertically corresponding to one of the reflectors. Both the inner and outer rings are equipped with connectors for connecting to the inner wall of the cabinet on the side away from the belt conveyor; the cross-sections of the positioning components and the clamps are both rectangular. The circuit board is placed on the belt conveyor through the feed inlet. Simultaneously, two electric push rods extend the fixing components to clamp and secure the circuit board. Then, the electric push rods move the circuit board towards the CCD camera along with the belt conveyor. The electric push rods are stabilized by a guide rail that limits the movement of the positioning component, preventing rotation. When the reflector on the electric push rod aligns with the infrared sensor, the hydraulic cylinder moves the CCD camera downwards to photograph the front of the circuit board. The positioning component on the electric push rod also moves into the clamp, and the motor drives the clamp to rotate. The clamp, in turn, drives the positioning component to rotate, thus moving the electric push rod connected to the positioning component and flipping the circuit board to the back for CCD camera inspection. After inspection, the positioning component again uses the guide rail to limit the movement of the electric push rod along the belt conveyor.

2. The circuit board visual inspection equipment according to claim 1, characterized in that: The circuit board visual inspection system also includes a wireless communication module, which is electrically connected to the main control module and is used to connect to a smart terminal.

3. The circuit board visual inspection equipment according to claim 1, characterized in that: The circuit board visual inspection system also includes an alarm module, which is electrically connected to the main control module.

4. The circuit board visual inspection equipment according to claim 1, characterized in that: The cabinet has a feed inlet on the front side and a discharge outlet on one end. The belt conveyor is located inside the discharge outlet.

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