Intelligent electric meter PCB optical detection equipment with automatic deviation correction function

Abstract

The invention belongs to the technical field of optical detection equipment, and particularly relates to intelligent electric meter PCB optical detection equipment with an automatic deviation rectifying function, which comprises a rack, an optical detection device is assembled at the upper end of the rack, and two PCB feeding mechanisms are assembled at the upper end of the rack and located on one side of the optical detection device. An electric push rod is fixed to the upper end of the rack, a fixing plate is fixed to the output end of the electric push rod, a first connecting plate is fixed to the upper end of the fixing plate, and the first connecting plate is fixedly connected with a PCB feeding mechanism. According to the invention, the distance between the suction nozzle of the positioning mechanism and the PCB feeding mechanism can be synchronously and accurately adjusted through an electric push rod linkage structure, and intelligent electric meter PCBs of different specifications can be quickly adapted without a special clamp, so that the detection efficiency is improved; meanwhile, the PCB is adsorbed and fixed through negative pressure, detection deviation is avoided, it is guaranteed that the optical detection reference is accurate, and errors are reduced.

Description

Technical Field

[0001] This invention belongs to the field of optical inspection equipment technology, specifically relating to an optical inspection device for smart meter PCB boards with automatic correction function. Background Technology

[0002] After the PCB board is manufactured, the electronic components soldered on it need to be inspected by placing the PCB board under an optical inspection lens.

[0003] A search revealed Chinese patent CN220063878U, which discloses an optical inspection device for PCB boards. This device can quickly adjust the spacing between two conveyor belts according to the width of the PCB board, ensuring reliable and stable transport of the PCB board to below the optical inspection lens, preventing PCB board collisions, warping, falling, or even failure to be transported. While the spacing of the symmetrically distributed conveyor belts is controlled by a lead screw motor, solving the problems of warping and falling of small-sized PCB boards caused by the fixed spacing of traditional conveyor rollers, it still has the following core defects: transport is achieved only by the two conveyor belts abutting against the edge of the PCB board, without an independent positioning mechanism. During inspection, the PCB board is prone to displacement due to slight vibrations and friction fluctuations of the conveyor belts, failing to provide a precise and stable reference for optical inspection and potentially leading to inspection errors. Based on these problems, this application proposes an optical inspection device for smart meter PCB boards with automatic correction function to improve these issues. Summary of the Invention

[0004] The purpose of this invention is to provide an optical inspection device for smart meter PCB boards with automatic correction function. It can synchronously and accurately adjust the distance between the positioning mechanism's suction nozzle and the PCB board feeding mechanism through an electric push rod linkage structure. It can quickly adapt to smart meter PCB boards of different specifications without the need for special fixtures, thereby improving inspection efficiency. At the same time, it uses negative pressure adsorption to fix the PCB board, avoiding inspection deviation, ensuring the accuracy of the optical inspection benchmark, and reducing errors.

[0005] The specific technical solution adopted by this invention is as follows:

[0006] An optical inspection device for PCB boards of smart meters with automatic correction function includes a frame. An optical inspection device is mounted on the upper end of the frame. Two PCB board feeding mechanisms are mounted on the upper end of the frame and on one side of the optical inspection device. An electric push rod is fixed on the upper end of the frame. A fixing plate is fixed on the output end of the electric push rod. A first connecting plate is fixed on the upper end of the fixing plate, and the first connecting plate is fixedly connected to one PCB board feeding mechanism. A second connecting plate is fixed on the side of the first connecting plate away from the optical inspection device. Two third connecting plates are fixed on the upper end of the second connecting plate. An adjustment component is mounted on the upper end of each of the two third connecting plates. A positioning mechanism is mounted on the upper end of the adjustment component.

[0007] In a preferred embodiment, the adjustment assembly includes a support plate, multiple moving blocks, multiple limiting posts, a moving plate, and multiple limiting slots. The support plate is disposed between two PCB board feeding mechanisms. The multiple moving blocks are disposed inside the support plate. The multiple limiting posts are fixed to the lower ends of the multiple moving blocks, and the multiple moving blocks and the multiple limiting posts correspond one-to-one. The moving plate is fixed to the upper end of the third connecting plate. The multiple limiting slots are formed inside the moving plate, and the multiple limiting posts and the multiple limiting slots correspond one-to-one.

[0008] In a preferred embodiment, the support plate has a plurality of fixing rods fixed inside, the plurality of fixing rods passing through the inner wall of the movable block, and the fixing rods and the movable block are slidably connected.

[0009] In a preferred embodiment, a slider is fixed to the upper end of the movable plate, and a groove is fixed to the lower end of the support plate, with the slider and the groove being compatible.

[0010] In a preferred embodiment, a side plate is fixed to the lower end of the support plate.

[0011] In a preferred embodiment, the positioning mechanism includes multiple fixed tubes, multiple air inlets, and multiple suction nozzles. The multiple fixed tubes are fixed to one side of multiple movable blocks, and the multiple fixed tubes and multiple movable blocks correspond one-to-one. The multiple air inlets are opened at the lower end of the multiple fixed tubes, and the multiple suction nozzles are fixed at the upper end of the multiple fixed tubes.

[0012] The technical effects achieved by this invention are as follows:

[0013] This invention uses an electric push rod to drive the moving plate, and with the cooperation of the limiting groove and the limiting post, the moving block slides along the fixed rod, simultaneously adjusting the spacing of the suction nozzles in the positioning mechanism. In addition, it coordinates with the spacing adjustment of the two PCB board feeding mechanisms, which can flexibly adapt to the positioning and testing needs of smart meter PCB boards of different sizes without the need to change special fixtures. The positioning mechanism adopts a negative pressure adsorption method, which can firmly fix the PCB board, avoiding the displacement of the PCB board during the testing process and providing a stable benchmark for optical testing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the PCB board feeding mechanism of the present invention;

[0016] Figure 3 This is a bottom view of the PCB board feeding mechanism and positioning mechanism of the present invention;

[0017] Figure 4 This is a bottom view of the adjustment component of the present invention;

[0018] Figure 5 This is a schematic diagram of the structure of the present invention viewed from below;

[0019] Figure 6 This is a schematic diagram of the positioning mechanism of the present invention.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 10. Frame; 11. Optical inspection device; 12. PCB board feeding mechanism; 13. Electric push rod; 14. Fixing plate; 15. First connecting plate; 16. Second connecting plate; 17. Third connecting plate; 20. Adjustment component; 21. Support plate; 22. Moving block; 23. Limiting post; 24. Moving plate; 25. Limiting groove; 26. Fixing rod; 27. Sliding block; 28. Slide groove; 29. ​​Side plate; 30. Positioning mechanism; 31. Fixing tube; 32. Air inlet; 33. Nozzle. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0026] Please see the appendix Figures 1 to 6 As shown, the present invention provides an optical inspection device for PCB boards of smart meters with automatic correction function, including a frame 10. An optical inspection device 11 is mounted on the upper end of the frame 10. Two PCB board feeding mechanisms 12 are mounted on the upper end of the frame 10 and on one side of the optical inspection device 11. An electric push rod 13 is fixed on the upper end of the frame 10. A fixing plate 14 is fixed on the output end of the electric push rod 13. A first connecting plate 15 is fixed on the upper end of the fixing plate 14, and the first connecting plate 15 and a PCB board feeding mechanism 12 are fixedly connected. A second connecting plate 16 is fixed on the side of the first connecting plate 15 away from the optical inspection device 11. Two third connecting plates 17 are fixed on the upper end of the second connecting plate 16. An adjustment component 20 is mounted on the upper end of each of the two third connecting plates 17. A positioning mechanism 30 is mounted on the upper end of the adjustment component 20.

[0027] In this embodiment, two PCB board feeding mechanisms 12 transport the smart meter PCB board to be tested to the testing area. One PCB board feeding mechanism 12 is fixed to the side of the frame 10 away from the optical inspection device 11, while the other PCB board feeding mechanism 12 is slidably disposed on the side of the frame 10 closer to the optical inspection device 11. When optical inspection of PCB boards of different sizes is performed, the optical inspection device 11 triggers the electric push rod 13 to start. The output end of the electric push rod 13 drives the fixed plate 14 and the first connecting plate 15 to move linearly. Since the first connecting plate 15 is fixedly connected to the slidably disposed PCB board feeding mechanism 12, the... This transmission structure can precisely drive the position of the PCB board feeding mechanism 12 on the sliding side, thereby adjusting the distance between the two PCB board feeding mechanisms 12 to accommodate PCB boards of different sizes. At the same time, the first connecting plate 15 drives the second connecting plate 16 and the two third connecting plates 17 to move synchronously, thereby driving the adjustment component 20 mounted on the upper end of the third connecting plate 17 to move. Both sides of the adjustment component 20 are provided with positioning mechanisms 30, which can stably adsorb and position the PCB board, further ensuring the positional stability of the optical detection device 11 when detecting the PCB board and avoiding the PCB board from shifting during the detection process.

[0028] It should be noted that the optical inspection device 11 is located above the PCB board feeding mechanism 12, and the PCB board to be inspected is located above the PCB board feeding mechanism 12 and directly below the optical inspection device 11. The adjustment component 20 and the positioning mechanism 30 are located directly below the PCB board. The optical inspection device 11 is equipped with a moving component (not shown in the figure) that can realize XYZ three-axis movement. This moving component can precisely control the optical lens to rise and fall in the vertical direction to adapt to the detection distance requirements of smart meter PCB boards of different thicknesses and ensure that the lens is in focus. On the other hand, it can drive the optical lens to complete the horizontal forward and backward and left and right translation, thereby driving the lens to perform a full-coverage scan of each detection area on the surface of the PCB board, providing comprehensive and accurate optical inspection data for the subsequent automatic correction algorithm. Two PCB board feeding mechanisms 12 are responsible for feeding and conveying the PCB boards to be tested and unloading and transferring the PCB boards after testing. The lower end of the two PCB board feeding mechanisms 12 is provided with a sliding groove, and the upper end of the frame 10 is provided with a guide rail. The sliding groove and the guide rail are compatible. One PCB board feeding mechanism 12 is slidably connected to the upper end of the guide rail, and the other PCB board feeding mechanism 12 is fixedly connected to the upper end of the guide rail. The upper ends of the two PCB board feeding mechanisms 12 are kept horizontal. The PCB board feeding mechanism 12 is existing technology, and its specific structure and principle will not be described.

[0029] In a preferred embodiment, please refer to Figure 4 , Figure 5 and Figure 6The adjustment component 20 includes a support plate 21, multiple moving blocks 22, multiple limiting posts 23, a moving plate 24, and multiple limiting slots 25. The support plate 21 is disposed between two PCB board feeding mechanisms 12. The multiple moving blocks 22 are disposed inside the support plate 21. The multiple limiting posts 23 are fixed to the lower ends of the multiple moving blocks 22, and the multiple moving blocks 22 and the multiple limiting posts 23 correspond one-to-one. The moving plate 24 is fixed to the upper end of the third connecting plate 17. The multiple limiting slots 25 are opened inside the moving plate 24, and the multiple limiting posts 23 and the multiple limiting slots 25 correspond one-to-one.

[0030] In this embodiment, the adjustment assembly 20 consists of a support plate 21, multiple moving blocks 22, multiple limiting posts 23, a moving plate 24, and multiple limiting slots 25. The support plate 21 is positioned between the two PCB board feeding mechanisms 12. The multiple moving blocks 22 are located inside the support plate 21. The multiple limiting posts 23 are fixedly connected to the lower ends of the multiple moving blocks 22. The moving plate 24 is fixed to the upper end of the third connecting plate 17. The multiple limiting slots 25 are correspondingly formed inside the moving plate 24 and are adapted to engage with the multiple limiting posts 23. During operation, when it is necessary to adjust the distance between the two PCB board feeding mechanisms 12 to accommodate PCB boards of different sizes, the electric push rod 13 extends, causing one PCB board feeding mechanism 12 to move towards the side closer to the optical detection device 11. At this time, the electric push rod 13 drives the upper fixed plate 14 to move synchronously. The movement of the fixed plate 14 causes the first connecting plate 15 to move, and the movement of the first connecting plate 15 can... This allows for a larger gap between the two PCB board feeding mechanisms 12, enabling the transport and support of larger PCB boards. Simultaneously, the first connecting plate 15 drives the second connecting plate 16 to move, and the second connecting plate 16 drives the two third connecting plates 17 to move synchronously. This, in turn, drives the moving plate 24 mounted on the upper end of the third connecting plate 17 to move. The moving plate 24 has multiple limiting grooves 25 inside, which are arc-shaped. Multiple limiting posts 23 pass through the multiple limiting grooves 25, and multiple moving blocks 22 are fixed to the upper ends of the multiple limiting posts 23. The multiple moving blocks 22 are slidably connected to the outside of multiple fixed rods 26. Therefore, the movement of the moving plate 24 can cause the multiple limiting posts 23 located inside the multiple limiting grooves 25 to move. The movement of the multiple limiting posts 23 drives the movement of the multiple moving blocks 22. The movement of the multiple moving blocks 22 can adjust the gap between the multiple suction nozzles 33 between the positioning mechanisms 30, thereby fixing PCB boards of different specifications.

[0031] It should be noted that the two adjustment components 20 are provided with two moving plates 24. The multiple limiting grooves 25 inside the two moving plates 24 are in the same direction. When the electric push rod 13 drives a PCB board feeding mechanism 12 toward the moving optical detection device 11 to widen the gap between the two PCB board feeding mechanisms 12, the two third connecting plates 17 can drive the two moving plates 24 to move simultaneously. The simultaneous movement of the two moving plates 24 can widen the gap between the multiple moving blocks 22 on the two adjustment components 20.

[0032] Secondly, please refer to it again. Figure 6 Multiple fixing rods 26 are fixed inside the support plate 21. The multiple fixing rods 26 penetrate the inner wall of the movable block 22, and the fixing rods 26 and the movable block 22 are slidably connected.

[0033] In this embodiment, the fixed rod 26 serves as a guide and support component for the movable block 22, providing a precise linear guide trajectory for the displacement of the movable block 22 within the support plate 21. The movable block 22 can slide smoothly along the extension direction of the fixed rod 26, thereby driving the lower fixed limit post 23 to adjust its position synchronously, ensuring that the limit post 23 can be accurately embedded in the corresponding limit groove 25 on the movable plate 24.

[0034] Secondly, please refer to the following as well. Figure 4 and Figure 5 The upper end of the movable plate 24 is fixed with a slider 27, and the lower end of the support plate 21 is fixed with a groove 28, and the slider 27 and the groove 28 are compatible.

[0035] In this embodiment, during the operation of the adjustment component 20, when the moving plate 24 is adjusted in position along with the third connecting plate 17, the slider 27 at the upper end of the moving plate 24 can slide smoothly along the groove 28 at the lower end of the support plate 21, which can effectively limit the displacement trajectory of the moving plate 24 and prevent the moving plate 24 from deflecting or shaking in the horizontal direction during the movement.

[0036] To further understand and explain, Figure 2 For example, a side plate 29 is fixed to the lower end of the support plate 21.

[0037] In this embodiment, the side plate 29 serves as a supporting structure for the support plate 21, which can enhance the load-bearing capacity and deformation resistance of the support plate 21.

[0038] In a preferred embodiment, please refer to Figures 1 to 6 The positioning mechanism 30 includes multiple fixed tubes 31, multiple air inlets 32 and multiple suction nozzles 33. The multiple fixed tubes 31 are fixed to one side of multiple moving blocks 22, and the multiple fixed tubes 31 and multiple moving blocks 22 correspond one-to-one. The multiple air inlets 32 are opened at the lower end of the multiple fixed tubes 31, and the multiple suction nozzles 33 are fixed at the upper end of the multiple fixed tubes 31.

[0039] In this embodiment, the air inlet 32 ​​and the negative pressure tube are fixedly connected. During operation, the external negative pressure device draws air into the fixed tube 31 through the air inlet 32, so that the suction nozzle 33 at the upper end of the fixed tube 31 forms a stable negative pressure suction. At the same time, the moving block 22 can slide along the fixed rod 26 inside the support plate 21, driving the fixed tube 31 and the suction nozzle 33 to adjust their positions synchronously, thereby adapting to the positioning requirements of smart meter PCB boards of different sizes. After the suction nozzle 33 moves to the preset positioning point of the PCB board, the negative pressure suction can firmly adsorb and fix the PCB board. The negative pressure adsorption method of the suction nozzle 33 can achieve non-destructive positioning of the PCB board, avoiding the scratch damage to the surface circuit of the PCB board caused by traditional mechanical gripper positioning. The one-to-one correspondence between the fixed tube 31 and the moving block 22 and the adjustable characteristics of the moving block 22 can flexibly adapt to the positioning requirements of various specifications of PCB boards, improve the versatility of the equipment, and further ensure the accuracy and stability of optical inspection of smart meter PCB boards.

[0040] It should be noted that the optical detection device 11, the PCB board feeding mechanism 12, the electric push rod 13, and the positioning mechanism 30 are existing devices. Their working principles, dimensions, and models are irrelevant to the functions of this application, so they will not be described in detail. The control method of this invention is controlled by a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this invention is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0041] The working principle of this invention is as follows:

[0042] During operation, two PCB board feeding mechanisms 12 are responsible for the feeding and conveying of the PCB boards to be tested from the smart meters, and the unloading and transfer of the PCB boards after testing. For PCB boards of different sizes, the optical inspection device 11 triggers the electric push rod 13 at the upper end of the frame 10 to start. The output end of the electric push rod 13 drives the fixed plate 14 and the first connecting plate 15 to move linearly. Since the first connecting plate 15 is fixedly connected to one of the slidably set PCB board feeding mechanisms 12, the distance between the two PCB board feeding mechanisms 12 can be precisely adjusted to adapt to different specifications of PCB boards. At the same time, the first connecting plate 15 drives the second connecting plate 16 and the two third connecting plates 17 to move synchronously, thereby driving the adjustment component 20 at the upper end of the third connecting plate 17 to move. When the adjustment component 20 is running, the moving plate 24 moves with the third connecting plate 17, and the slider 27 at its upper end moves along the groove 28 at the lower end of the support plate 21. Smooth sliding: The fixed rod 26 inside the support plate 21 provides linear guidance for the moving block 22. The limiting groove 25 on the moving plate 24 drives the limiting post 23 and the moving block 22 to slide along the fixed rod 26, thereby adjusting the distance between the moving blocks 22. The side plate 29 at the lower end of the support plate 21 enhances the overall structural stability and works in conjunction with the guide and limiting of the slider 27 and the slide groove 28. While the distance between the moving blocks 22 is adjusted, the positioning mechanism 30 on one side adjusts its position synchronously. The external negative pressure device draws air through the air inlet 32 ​​at the lower end of the fixed tube 31, so that the suction nozzle 33 at the upper end of the fixed tube 31 forms a negative pressure suction. After the suction nozzle 33 moves to the preset positioning point of the PCB board, it firmly adsorbs and fixes the PCB board, ensuring the positional stability during testing. After the test is completed, the external negative pressure device stops the air extraction operation, the negative pressure suction of the suction nozzle 33 disappears, and the PCB board is released from the fixed constraint. At this time, the PCB board delivery mechanism 12, which is responsible for the unloading and transfer operation, is activated, smoothly transporting the inspected smart meter PCB board to the designated unloading area. Simultaneously, another set of PCB boards is delivered to the mechanism 12 to transport the next PCB board to be inspected to the inspection station. At the same time, the XYZ three-axis moving component of the optical inspection device 11 drives the optical lens to move vertically up and down to adapt to the focusing requirements of PCB boards of different thicknesses, and moves the lens horizontally back and forth and left and right to perform a full-coverage scan of the PCB board surface. This provides comprehensive and accurate inspection data for the subsequent automatic correction algorithm, completing the precise optical inspection of the smart meter PCB board.

[0043] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An optical inspection device for a smart meter PCB board with automatic correction function, comprising a frame (10), wherein an optical inspection device (11) is mounted on the upper end of the frame (10), and two PCB board feeding mechanisms (12) are mounted on the upper end of the frame (10) and on one side of the optical inspection device (11), characterized in that: An electric push rod (13) is fixed to the upper end of the frame (10). A fixed plate (14) is fixed to the output end of the electric push rod (13). A first connecting plate (15) is fixed to the upper end of the fixed plate (14). The first connecting plate (15) and a PCB board feeding mechanism (12) are fixedly connected. A second connecting plate (16) is fixed to the side of the first connecting plate (15) away from the optical detection device (11). Two third connecting plates (17) are fixed to the upper end of the second connecting plate (16). An adjustment component (20) is assembled to the upper end of each of the two third connecting plates (17). A positioning mechanism (30) is assembled to the upper end of the adjustment component (20).

2. The optical inspection equipment for a smart meter PCB board with automatic correction function according to claim 1, characterized in that: The adjustment assembly (20) includes a support plate (21), multiple moving blocks (22), multiple limiting posts (23), a moving plate (24), and multiple limiting slots (25). The support plate (21) is disposed between two PCB board feeding mechanisms (12). The multiple moving blocks (22) are disposed inside the support plate (21). The multiple limiting posts (23) are fixed to the lower ends of the multiple moving blocks (22), and the multiple moving blocks (22) and the multiple limiting posts (23) correspond one-to-one. The moving plate (24) is fixed to the upper end of the third connecting plate (17). The multiple limiting slots (25) are opened inside the moving plate (24), and the multiple limiting posts (23) and the multiple limiting slots (25) correspond one-to-one.

3. The optical inspection equipment for a smart meter PCB board with automatic correction function according to claim 2, characterized in that: The support plate (21) has multiple fixing rods (26) fixed inside. The multiple fixing rods (26) penetrate the inner wall of the moving block (22), and the fixing rods (26) and the moving block (22) are slidably connected.

4. The optical inspection equipment for a smart meter PCB board with automatic correction function according to claim 2, characterized in that: The upper end of the movable plate (24) is fixed with a slider (27), and the lower end of the support plate (21) is fixed with a groove (28), and the slider (27) and the groove (28) are compatible.

5. The optical inspection equipment for a smart meter PCB board with automatic correction function according to claim 2, characterized in that: The lower end of the support plate (21) is fixed with a side plate (29).

6. The optical inspection equipment for a smart meter PCB board with automatic correction function according to claim 1, characterized in that: The positioning mechanism (30) includes multiple fixed tubes (31), multiple air inlets (32) and multiple suction nozzles (33). The multiple fixed tubes (31) are fixed to one side of multiple moving blocks (22), and the multiple fixed tubes (31) and multiple moving blocks (22) correspond one to one. The multiple air inlets (32) are opened at the lower end of the multiple fixed tubes (31), and the multiple suction nozzles (33) are fixed at the upper end of the multiple fixed tubes (31).

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