Vision-based device for detecting foreign matters under PCB (Printed Circuit Board) board oil

Abstract

The invention relates to the technical field of PCBs (printed circuit boards), in particular to a vision-based device for detecting foreign matters under PCB board oil, which comprises a device shell, a detection table is fixedly connected to the middle of the inner wall of the device shell, and a high-power microscope control mechanism is fixedly connected to the rear side of the top of the device shell. The inner wall of the left side of the device shell is fixedly connected with an automatic feeding mechanism, and the side, aligned with the automatic feeding mechanism, of the inner wall of the right side of the device shell is fixedly connected with an abnormal PCB discharging mechanism. Compared with the prior art, automatic detection and classification treatment of foreign matters under PCB board oil are achieved, the detection efficiency and accuracy are greatly improved, feeding, detection and discharging of PCBs and classification treatment of abnormal PCBs can be automatically completed through a high-precision mechanical transmission and intelligent control system, manual intervention is not needed, and the labor cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB boards, and more particularly to a vision-based device for detecting foreign matter under oil on PCB boards. Background Art

[0002] A printed circuit board (PCB), or printed circuit board, is an essential component in modern electronic devices. It is a flat plate made of insulating material, covered with pre-designed circuit paths. These paths are formed on copper foil using a specific process, such as etching or additive manufacturing. Subsequently, electronic components such as resistors, capacitors, and transistors are attached to the PCB by soldering or other means and connected according to the pre-defined circuits, thus forming a complete functional circuit. The primary function of the PCB is to provide electrical connections between the electronic components and serve as the mechanical foundation supporting these components. Due to its flexible design, compact size, light weight, and ease of automated production and assembly, PCBs are widely used in the electronic equipment manufacturing industry.

[0003] According to patent document: CN117991081A, a PCB board online automatic inspection device is disclosed, including a base plate, a feed guide assembly, and a detection tooling assembly. An ultrasonic transducer vibration head is fixedly installed on the upper part of the feed guide assembly. When the PCB board online automatic inspection device is in operation, the PCB board moves on the feed guide assembly and performs rough positioning, and the detection tooling assembly performs precise positioning and automatic inspection of the PCB board. During the precise positioning of the PCB board, the ultrasonic transducer vibration head applies ultrasonic vibration to the feed guide assembly, driving the PCB board to also generate ultrasonic vibration, so that ultrasonic vibration is generated between the detection probe and the PCB board. The ultrasonic vibration automatically removes foreign matter or surface oxide layer adhering to the end of the detection probe, ensuring the reliability of the contact between the detection probe and the PCB board. The ultrasonic vibration of the PCB board will also expose potential cracks and cold solder joints of resistors and capacitors in advance, and screen them out in advance during the automatic inspection process of the PCB board to prevent them from flowing to the user end, so that the product customer return rate is fundamentally controlled.

[0004] During the PCB manufacturing process, solder mask ink is used to cover areas where soldering is not required to prevent short circuits. However, impurities or particles may be trapped under the solder mask ink, which may cause circuit short circuits, poor insulation, or other reliability issues. Traditional PCB sub-panel foreign matter detection is usually performed through manual visual inspection or simple optical inspection instruments. These methods are not only inefficient but also easily affected by human factors, resulting in missed detection or misjudgment. Summary of the Invention

[0005] To overcome the above-mentioned defects of the prior art, the present invention provides a vision-based foreign object detection device under the solder mask of a PCB board. The technical problem to be solved by the present invention is as follows: However, impurities or particles may be mixed under the solder mask, which may lead to circuit short circuits, poor insulation or other reliability problems. Traditional foreign object detection under the solder mask of a PCB board is usually carried out by manual visual inspection or simple optical detection instruments. These methods are not only inefficient but also easily affected by human factors, resulting in missed detections or misjudgments.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0007] A vision-based foreign object detection device under the solder mask of a PCB board, including a device housing. In the middle of the inner wall of the device housing, there is a fixed connection with a detection table. At the rear side of the top of the device housing, there is a fixed connection with a high-power microscope control mechanism. On the left inner wall of the device housing, there is a fixed connection with an automatic feeding mechanism. On the right inner wall of the device housing, on the side aligned with the automatic feeding mechanism, there is a fixed connection with an abnormal PCB board discharging mechanism;

[0008] The device housing includes a housing main body. On the front side of the housing main body, there is a discharge slot. On the left side of the housing main body, there is a feeding slot. On the rear side of the housing main body, there is a control slot;

[0009] The detection table includes a detection table main body. On the front side of the outer wall of the detection table main body, there is a fixed connection with a discharge control component. The structure of the discharge control component is the same as that of the abnormal PCB board discharging mechanism;

[0010] The automatic feeding mechanism includes a feeding chute plate. The outer wall of the feeding chute plate is fixedly connected to the inner wall of the feeding slot. The right side of the feeding chute plate extends to the inner wall of the housing main body and is fixedly connected to a feeding control bin at the bottom;

[0011] The high-power microscope control mechanism includes a connecting frame. At the top of the connecting frame, there is a high-power microscope connecting component.

[0012] As a further solution of the present invention: In the middle of the left side of the top of the housing main body, there is a fixed connection with an L-shaped connecting rod. On the right side of the L-shaped connecting rod, there is a fixed connection with a motor. The output end of the motor is fixedly connected to a rotating rod. The bottom end of the rotating rod is fixedly connected to a rotating bar. On the right side of the rotating bar, there is a fixed connection with a resisting rod. On the left side of the rotating bar, there is a fixed connection with a sector plate.

[0013] As a further solution of the present invention: The detection table body includes a lifting control column, the bottom of the lifting control column is fixedly connected to the middle of the inner wall bottom of the housing body, guiding grooves are respectively formed on both sides of the outer wall of the lifting control column, a rear guiding groove is formed at the rear side of the lifting control column, a hydraulic push rod is fixedly connected to the inner wall bottom of the lifting control column, the top of the hydraulic push rod is fixedly connected to a push plate, push plate sliders are fixedly connected to both sides of the outer wall of the push plate, the outer walls of the two push plate sliders are respectively slidably connected to the inner walls of the two guiding grooves, the top of the push plate is fixedly connected to a top plate, a turntable is rotatably connected to the top of the top plate, chute rods are fixedly connected to the inner side of the turntable in an annular array, an axial center turntable is fixedly connected to the inner sides of the plurality of chute rods, an axial center turntable rotating rod is fixedly connected to the bottom of the axial center turntable, and the bottom of the axial center turntable rotating rod is rotatably connected to the middle of the inner side bottom of the top plate.

[0014] As a further solution of the present invention: U-shaped connecting frames are fixedly connected to the outer wall of the turntable in an annular array, PBC board support plates are slidably connected to the inner walls of the plurality of U-shaped connecting frames, and rack bars are fixedly connected to the bottoms of the plurality of PBC board support plates.

[0015] As a further solution of the present invention: The discharging control assembly includes a discharging base, a feeding guiding plate is fixedly connected to the top of the discharging base, the front side of the feeding guiding plate extends to the outer wall of the housing body through a discharging groove, a driving disc motor is fixedly connected to the right side of the feeding guiding plate on the inner wall of the housing body, gear rotating rod connecting blocks are respectively fixedly connected to the left and right sides at the rear side of the feeding guiding plate, the output end of the driving disc motor is fixedly connected to a driving disc, a crawler is sleeved on the outer wall of the driving disc, a second driving disc is sleeved on the inner wall of the side of the crawler away from the driving disc, a gear rotating rod is fixedly connected to the left side of the second driving disc, the left end of the gear rotating rod extends to the inner sides of the two gear rotating rod connecting blocks and is rotatably connected to the right side of the left gear rotating rod connecting block, and a gear is fixedly connected to the outer wall of the gear rotating rod extending to the inner sides of the two gear rotating rod connecting blocks.

[0016] As a further solution of the present invention: The left side of the feeding chute plate extends to the outer wall of the housing body and a triangular support plate is fixedly connected to the bottom, the right side of the triangular support plate is fixedly connected to the left side of the outer wall of the housing body, a feeding gear hinge groove is formed at the top left side of the feeding control bin, a second motor is fixedly connected to the inner wall bottom of the feeding control bin, the output end of the second motor is fixedly connected to a second gear, a third gear is meshed with the outer wall of the second gear, the outer wall of the third gear is rotatably connected to the inner wall of the feeding gear hinge groove, a plurality of second PBC board support plates are slidably connected to the inner wall of the feeding chute plate, second rack bars are fixedly connected to the bottoms of the plurality of second PBC board support plates, and the second rack bar at the bottom of the rightmost second PBC board support plate is meshed with the outer wall of the third gear.

[0017] As a further solution of the present invention: a columnar pushing rod is slidably connected to the inner wall on the left side of the feeding chute plate. The left end of the columnar pushing rod is fixedly connected to a cross plate. Both the front and rear sides on the right side of the cross plate are fixedly connected with side sliding rods. The inner sides of the two side sliding rods are slidably connected to the outer wall of the feeding chute plate. On both sides of the inner sides of the two side sliding rods on the right side of the cross plate, springs are fixedly connected. The right ends of the two springs are respectively fixedly connected to the front and rear sides on the left side of the feeding chute plate. The right end of the columnar pushing rod extends to the inside of the feeding chute plate and fits against the left side of the leftmost second PBC board support plate.

[0018] As a further solution of the present invention: the connecting frame includes a hinged vertical plate. The inner top of the hinged vertical plate is fixedly connected with an axis rod. Both the left and right sides of the hinged vertical plate are fixedly connected with two U-shaped connecting plates. The outer sides of the two groups of U-shaped connecting plates are both fixedly connected with L-shaped support plates. The bottoms of the two L-shaped support plates are respectively fixedly connected to the left and right sides at the rear of the top of the housing main body. The bottoms of the two L-shaped support plates are both fixedly connected with triangular reinforcing plates. The fronts of the two triangular reinforcing plates are both fixedly connected to the rear of the housing main body.

[0019] As a further solution of the present invention: a support block is fixedly connected to the front side of the hinged vertical plate. Side connecting plates are fixedly connected to the tops of both the left and right sides of the hinged vertical plate. A storage bin is fixedly connected to the inner top of the two side connecting plates.

[0020] As a further solution of the present invention: the high-power microscope connection assembly includes a flipping plate. A high-power microscope is fixedly connected to the front side of the flipping plate. The rear side of the flipping plate is designed as a triangle. The inner wall at the bottom of the rear side of the flipping plate is rotatably connected to the outer wall of the axis rod. The outer wall at the top of the rear side of the flipping plate is rotatably connected to a double-sided hinged rod. The rear side of the inner side of the double-sided hinged rod is rotatably connected to an L-shaped push-pull rod. The front side at the bottom of the L-shaped push-pull rod extends to the inner wall of the guide groove through a control groove and a rear guide groove and is fixedly connected to the outer wall of the push plate.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention realizes the automatic detection and classification of foreign objects under the oil of PCB boards by setting up a device housing, a detection table, an automatic feeding mechanism and a high-power microscope control mechanism, greatly improving the detection efficiency and accuracy. Through high-precision mechanical transmission and intelligent control systems, the present invention can automatically complete the feeding, detection, discharging of PCB boards and the classification of abnormal PCB boards without manual intervention, reducing labor costs while improving detection accuracy and work efficiency. In addition, by designing a reasonable mechanical structure and intelligent control algorithms, the present invention also has high stability and reliability, and can meet the requirements of continuous long-term operation. Its unique stage rotation design not only ensures the precise detection of each PCB board during the detection process, but also effectively avoids mechanical wear and error accumulation problems that may be caused by continuous rotation. The present invention also realizes the rapid processing and collection of abnormal PCB boards, avoiding the cumbersome and inefficient manual screening. In addition, the overall structure design of the present invention is compact and reasonable, and the cooperation between components is tacit, which not only improves the overall performance of the detection device, but also reduces energy consumption and noise, providing users with a more comfortable and efficient use experience. Therefore, the present invention has broad application prospects and market demand in the field of foreign object detection under the oil of PCB boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structure schematic diagram of the main body of the present invention;

[0024] Figure 2 is a three-dimensional structure schematic diagram of the device housing of the present invention;

[0025] Figure 3 is an enlarged structure schematic diagram of part A of the present invention;

[0026] Figure 4 is a three-dimensional structure schematic diagram of the detection table of the present invention;

[0027] Figure 5 is a three-dimensional separated structure schematic diagram of the main body of the detection table of the present invention;

[0028] Figure 6 is a three-dimensional structure schematic diagram of the discharging control component of the present invention;

[0029] Figure 7 is a three-dimensional separated structure schematic diagram of the automatic feeding mechanism of the present invention;

[0030] Figure 8 is a three-dimensional structure schematic diagram of the high-power microscope control mechanism of the present invention;

[0031] Figure 9 is a three-dimensional structure schematic diagram of the connecting frame of the present invention;

[0032] Figure 10Schematic three-dimensional structure diagram of the high-power microscope connection component of the present invention.

[0033] In the figure: 1. Device housing; 11. Housing main body; 12. Feeding groove; 13. Control groove; 14. Discharge groove; 15. Inverted L-shaped connecting rod; 16. Motor; 17. Rotating rod; 18. Rotating bar; 19. Supporting rod; 110. Sector plate; 2. Detection table; 21. Detection table main body; 211. Lifting control column; 212. Guide groove; 213. Hydraulic push rod; 214. Rear guide groove; 215. Push plate; 216. Push plate slider; 217. Top plate; 218. Turntable; 219. Chute rod; 2110. Axial turntable; 2111. Axial turntable rotating rod; 2112. U-shaped connecting frame; 2113. PBC board support plate; 2114. Rack rod; 22. Discharge control assembly; 221. Discharge base; 222. Feeding guide plate; 223. Gear rotating rod connecting block; 224. Driving disc motor; 225. Driving disc; 226. Track; 227. Second driving disc; 228. Gear rotating rod; 229. Gear; 3. Automatic feeding mechanism; 31. Feeding chute plate; 32. Feeding control bin; 33. Feeding gear hinge groove; 34. Second motor; 35. Second gear; 36. Third gear; 37. Triangular support plate; 38. Second PBC board support plate; 39. Second rack rod; 310. Columnar pushing rod; 311. Cross plate; 312. Side sliding rod; 313. Spring; 4. High-power microscope control mechanism; 41. Connecting frame; 411. Hinged vertical plate; 412. U-shaped connecting plate; 413. Axial rod; 414. Side connecting plate; 415. Storage bin; 416. Support block; 417. L-shaped support plate; 418. Triangular reinforcement plate; 42. High-power microscope connection component; 421. Flipping plate; 422. High-power microscope; 423. Bi-directional hinge rod; 424. L-shaped push-pull rod; 5. Abnormal PCB board discharging mechanism. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] As Figure 1As shown in the figure, the present invention provides a vision-based foreign object detection device for PCB boards under oil, including a device housing 1. In the middle of the inner wall of the device housing 1, a detection table 2 is fixedly connected. At the rear side of the top of the device housing 1, a high-power microscope control mechanism 4 is fixedly connected. On the left inner wall of the device housing 1, an automatic feeding mechanism 3 is fixedly connected. On the right inner wall of the device housing 1 and on the side opposite to the automatic feeding mechanism 3, an abnormal PCB board discharging mechanism 5 is fixedly connected.

[0036] As Figures 2 - 10As shown in the figure, the device housing 1 includes a housing main body 11. A discharge chute 14 is provided on the front side of the housing main body 11. A feeding chute 12 is provided on the left side of the housing main body 11. A control chute 13 is provided on the rear side of the housing main body 11. In the middle of the left side of the top of the housing main body 11, an inverted L-shaped connecting rod 15 is fixedly connected. On the right side of the inverted L-shaped connecting rod 15, a motor 16 is fixedly connected. The output end of the motor 16 is fixedly connected with a rotating rod 17. At the bottom end of the rotating rod 17, a rotating bar 18 is fixedly connected. On the right side of the rotating bar 18, a resisting rod 19 is fixedly connected. On the left side of the rotating bar 18, a sector plate 110 is fixedly connected. The detection table 2 includes a detection table main body 21. On the front side of the outer wall of the detection table main body 21, a discharge control assembly 22 is fixedly connected. The structure of the discharge control assembly 22 is the same as that of the abnormal PCB board discharging mechanism 5. The detection table main body 21 includes a lifting control column 211. The bottom of the lifting control column 211 is fixedly connected to the middle of the bottom inner wall of the housing main body 11. On both sides of the outer wall of the lifting control column 211, guiding grooves 212 are respectively provided. On the rear side of the lifting control column 211, a rear guiding groove 214 is provided. At the bottom of the inner wall of the lifting control column 211, a hydraulic push rod 213 is fixedly connected. The top of the hydraulic push rod 213 is fixedly connected with a push plate 215. On both sides of the outer wall of the push plate 215, push plate sliders 216 are fixedly connected. The outer walls of the two push plate sliders 216 are respectively slidably connected to the inner walls of the two guiding grooves 212. The top of the push plate 215 is fixedly connected with a top plate 217. On the top of the top plate 217, a turntable 218 is rotatably connected. On the inner side of the turntable 218, a chute rod 219 is fixedly connected in an annular array. Inside the multiple chute rods 219, a central axis turntable 2110 is fixedly connected. The bottom of the central axis turntable 2110 is fixedly connected with a central axis turntable rotating rod 2111. The bottom of the central axis turntable rotating rod 2111 is rotatably connected to the middle of the bottom inner side of the top plate 217. On the outer wall of the turntable 218, a U-shaped connecting frame 2112 is fixedly connected in an annular array. Inside the multiple U-shaped connecting frames 2112, a PBC board supporting plate 2113 is slidably connected. On the bottom of the multiple PBC board supporting plates 2113, a rack bar 2114 is fixedly connected. The discharge control assembly 22 includes a discharge base 221. On the top of the discharge base 221, a feeding guiding plate 222 is fixedly connected. The front side of the feeding guiding plate 222 extends to the outer wall of the housing main body 11 through the discharge chute 14. On the right side of the inner wall of the housing main body 11 of the feeding guiding plate 222, a driving disc motor 224 is fixedly connected. On the left and right sides of the rear side of the feeding guiding plate 222, a gear rotating rod connecting block 223 is respectively fixedly connected. The output end of the driving disc motor 224 is fixedly connected with a driving disc 225. A crawler 226 is sleeved on the outer wall of the driving disc 225. On the inner wall of the side of the crawler 226 away from the driving disc 225, a second driving disc 227 is sleeved. On the left side of the second driving disc 227, a gear rotating rod 228 is fixedly connected. The left end of the gear rotating rod 228 extends to the inner sides of the two gear rotating rod connecting blocks 223 and is rotatably connected to the right side of the left gear rotating rod connecting block 223.The gear rotating rod 228 extends to the outer wall inside the two gear rotating rod connecting blocks 223 and is fixedly connected with a gear 229. The automatic feeding mechanism 3 includes a feeding chute plate 31. The outer wall of the feeding chute plate 31 is fixedly connected to the inner wall of the feeding chute 12. The right side of the feeding chute plate 31 extends to the inner wall of the housing main body 11 and is fixedly connected with a feeding control bin 32 at the bottom. The left side of the feeding chute plate 31 extends to the outer wall of the housing main body 11 and is fixedly connected with a triangular support plate 37 at the bottom. The right side of the triangular support plate 37 is fixedly connected to the left side of the outer wall of the housing main body 11. A feeding gear hinge groove 33 is opened at the left side of the top of the feeding control bin 32. A second motor 34 is fixedly connected to the bottom of the inner wall of the feeding control bin 32. The output end of the second motor 34 is fixedly connected with a second gear 35. A third gear 36 is meshed with the outer wall of the second gear 35. The outer wall of the third gear 36 is rotatably connected to the inner wall of the feeding gear hinge groove 33. A plurality of second PBC board trays 38 are slidably connected to the inner wall of the feeding chute plate 31. Second rack bars 39 are fixedly connected to the bottoms of the plurality of second PBC board trays 38. The second rack bar 39 at the bottom of the rightmost second PBC board tray 38 is meshed with the outer wall of the third gear 36. A columnar pushing rod 310 is slidably connected to the left inner wall of the feeding chute plate 31. A cross plate 311 is fixedly connected to the left end of the columnar pushing rod 310. Side sliding rods 312 are fixedly connected to the front and rear sides on the right side of the cross plate 311. The inner sides of the two side sliding rods 312 are slidably connected to the outer wall of the feeding chute plate 31. Springs 313 are fixedly connected to both sides inside the two side sliding rods 312 on the right side of the cross plate 311. The right ends of the two springs 313 are respectively fixedly connected to the front and rear sides on the left side of the feeding chute plate 31. The right end of the columnar pushing rod 310 extends to the inside of the feeding chute plate 31 and is attached to the left side of the leftmost second PBC board tray 38. A columnar pushing rod 310 is slidably connected to the left inner wall of the feeding chute plate 31. A cross plate 311 is fixedly connected to the left end of the columnar pushing rod 310. Side sliding rods 312 are fixedly connected to the front and rear sides on the right side of the cross plate 311. The inner sides of the two side sliding rods 312 are slidably connected to the outer wall of the feeding chute plate 31. Springs 313 are fixedly connected to both sides inside the two side sliding rods 312 on the right side of the cross plate 311. The right ends of the two springs 313 are respectively fixedly connected to the front and rear sides on the left side of the feeding chute plate 31. The right end of the columnar pushing rod 310 extends to the inside of the feeding chute plate 31 and is attached to the left side of the leftmost second PBC board tray 38. The connecting frame 41 includes a hinged vertical plate 411. An axis rod 413 is fixedly connected to the inner side of the top of the hinged vertical plate 411. Two U-shaped connecting plates 412 are fixedly connected to both the left and right sides of the hinged vertical plate 411. L-shaped support plates 417 are fixedly connected to the outer sides of the two groups of U-shaped connecting plates 412. The bottoms of the two L-shaped support plates 417 are respectively fixedly connected to the left and right sides at the rear of the top of the housing main body 11. Triangular reinforcement plates 418 are fixedly connected to the bottoms of the two L-shaped support plates 417.The front sides of two triangular reinforcement plates 418 are fixedly connected to the rear side of the housing main body 11. A support block 416 is fixedly connected to the front side of the hinged vertical plate 411. Side connecting plates 414 are fixedly connected to the top parts on the left and right sides of the hinged vertical plate 411. A storage bin 415 is fixedly connected to the inner top parts of the two side connecting plates 414. The high-power microscope connection assembly 42 includes a flipping plate 421. A high-power microscope 422 is fixedly connected to the front side of the flipping plate 421. The rear side of the flipping plate 421 is designed as a triangle. The inner wall of the bottom part at the rear side of the flipping plate 421 is rotatably connected to the outer wall of the central axis rod 413. The outer wall of the top part at the rear side of the flipping plate 421 is rotatably connected to a double-direction hinged rod 423. The rear side of the inner side of the double-direction hinged rod 423 is rotatably connected to an L-shaped push-pull rod 424. The front side of the bottom part of the L-shaped push-pull rod 424 extends to the inner wall of the guide groove 212 through the control groove 13 and the rear guide groove 214 and is fixedly connected to the outer wall of the push plate 215;

[0037] When it is necessary to detect foreign objects under the oil on the PCB board, first, install multiple PBC boards on multiple PBC board pallets 2113 and multiple second PBC board pallets 38 to place the PCB boards. Then start the motor 16. After the motor 16 starts, it will drive the rotating rod 17 to rotate. The rotation of the rotating rod 17 further drives the rotating rod 18 to rotate. The rotation of the rotating rod 18 causes the abutting rod 19 and the sector plate 110 to rotate synchronously. During this process, the abutting rod 19 will periodically contact the chute rod 219 on the turntable 218. Whenever the abutting rod 19 contacts a certain chute rod 219, a rotating force will be given to the turntable 218, causing the turntable 218 to rotate a certain angle in stages. This staged rotation design can ensure that the PCB boards can be sent one by one under the high-power microscope 422 for detailed detection of foreign objects under the oil during the detection process. When the PCB board on the top of the PBC board pallet 2113 after detection rotates to the front side, at this time, start the hydraulic push rod 213. The hydraulic push rod 213 pulls the push plate 215, the top plate 217 and the turntable 218 on it to move downward, and at the same time, the motor 16 stops. When the turntable 218 moves downward, at this time, the rack rod 2114 fixed to the bottom of the PBC board pallet 2113 facing the inner wall of the front U-shaped connecting frame 2112 meshes with the outer wall of the gear 229, and through the rotation of the gear 229, it further drives the rack rod 2114 to move along the feeding guide plate 222, and then pushes the PBC board that has completed the detection and has no foreign objects from the turntable 218 through the PBC board pallet 2113 at the bottom to the discharge chute 14 and pushes it out of the inner wall of the housing body 11. When the discharging is completed, the hydraulic push rod 213 pushes the push plate 215, the top plate 217 and the turntable 218 on it to reset. At this time, the motor 16 can be started again to continue rotating the turntable 218 to turn the PCB board on the top of the PBC board pallet 2113 to the bottom of the high-power microscope 422 for detection. In addition, when the PCB board with foreign objects rotates to the top of the abnormal PCB board discharging mechanism 5 through the PBC board pallet 2113, the abnormal PCB board discharging mechanism 5 starts to push the PCB board containing foreign objects to the preset abnormal collection area. The design of the abnormal PCB board discharging mechanism 5 is the same as that of the discharging control component 22, and both achieve precise control and classification of the PCB board through precise mechanical transmission and intelligent control;

[0038] When the U-shaped connecting frame 2112 without the PBC board rotates to the position facing the feeding chute plate 31, the automatic feeding mechanism 3 is activated. The second motor 34 drives the second gear 35 to rotate. Since the second gear 35 meshes with the third gear 36, the third gear 36 rotates accordingly and drives the rightmost second rack bar 39 that meshes with it to move. The second rack bar 39 is fixedly connected to the bottom of the rightmost second PBC board support plate 38. Therefore, the second PBC board support plate 38 slides along the inner wall of the feeding chute plate 31 until it moves inside the U-shaped connecting frame 2112 without the PBC board. As the rightmost second PBC board support plate 38 moves, the remaining second PBC board support plates 38 move leftward in sequence under the action of the columnar pushing rod 310 and the spring 313, realizing the automatic feeding of the PBC board;

[0039] When the hydraulic push rod 213 pushes or pulls the push plate 215 and the top disc 217 and the turntable 218 on it to move, the L-shaped push rod 424 on the outer wall of the push plate 215 is driven to move synchronously. The movement of the L-shaped push rod 424 further drives the double-jointed rod 423 to rotate around its rotation connection point. Since the top of the rear side of the flip plate 421 is connected to the L-shaped push rod 424 through the double-jointed rod 423, and the bottom of the rear side of the flip plate 421 is rotationally connected to the axis rod 413, the swing of the double-jointed rod 423 will drive the flip plate 421 to flip around the axis rod 413, thus realizing the up and down flipping control of the high-power microscope 422, enabling the high-power microscope 422 to be adjusted according to whether the turntable 218 is rotating or discharging. When the turntable 218 is in the discharging state, the high-power microscope 422 is received on the inner wall of the storage bin 415 to prevent its lens from being exposed outside for a long time, resulting in dust attachment and affecting the subsequent detection accuracy of foreign objects under the oil of the PCB board. When the turntable 218 is in the rotating state, the high-power microscope 422 flips to the directly above the PCB board to conduct a detailed detection of foreign objects under the oil of the PCB board, ensuring the accuracy of the detection. At the same time, the storage bin 415 stores the flipped high-power microscope 422, which not only avoids damage to the high-power microscope 422 when it is not in use but also ensures the overall aesthetics of the detection device. In addition, the high-power microscope 422 is electrically connected to an external control device through a circuit, thereby realizing functions such as focal length adjustment and image acquisition of the high-power microscope 422, further improving the detection efficiency and accuracy. During the detection process, the high-power microscope 422 can clearly capture tiny foreign objects under the oil of the PCB board, such as dust and metal fragments, providing strong support for quality control in the production process.

[0040] Working principle of the present invention: When it is necessary to detect foreign objects under the oil on the PCB board, first, a plurality of PCB boards are placed on a plurality of PCB board pallets 2113 and a plurality of second PCB board pallets 38. Then, the motor 16 is started. After the motor 16 is started, it will drive the rotating rod 17 to rotate. The rotation of the rotating rod 17 further drives the rotating rod 18 to rotate. The rotation of the rotating rod 18 causes the abutting rod 19 and the sector plate 110 to rotate synchronously. During this process, the abutting rod 19 will periodically contact the chute rod 219 on the turntable 218. Whenever the abutting rod 19 contacts a certain chute rod 219, a rotating force will be given to the turntable 218, causing the turntable 218 to rotate a certain angle in stages. This staged rotation design can ensure that the PCB boards can be sent one by one under the high-power microscope 422 for detailed detection of foreign objects under the oil during the detection process. When the PCB board on the top of the PCB board pallet 2113 after detection rotates to the front side, at this time, the hydraulic push rod 213 is started. The hydraulic push rod 213 pulls the push plate 215, the top plate 217 and the turntable 218 on its top to move downward, and at the same time, the motor 16 stops. When the turntable 218 moves downward, at this time, the rack bar 2114 fixed to the bottom of the PCB board pallet 2113 facing the inner wall of the front U-shaped connecting frame 2112 meshes with the outer wall of the gear 229, and through the rotation of the gear 229, the rack bar 2114 is further driven to move along the feeding guide plate 222, and then the PCB board that has completed the detection and has no foreign objects is pushed from the turntable 218 through the bottom PCB board pallet 2113 to the discharge chute 14 and pushed out of the inner wall of the housing main body 11. When the discharging is completed, the hydraulic push rod 213 pushes the push plate 215, the top plate 217 and the turntable 218 on its top to reset. At this time, the motor 16 can be started again to continue rotating the turntable 218 to turn the PCB board on the top of the PCB board pallet 2113 to be detected to the bottom of the high-power microscope 422 for detection. In addition, when the PCB board with foreign objects is transferred to the top of the abnormal PCB board discharging mechanism 5 through the PCB board pallet 2113, the abnormal PCB board discharging mechanism 5 is started, and its internal mechanism will identify and push the PCB board containing foreign objects to the preset abnormal collection area. The design of the abnormal PCB board discharging mechanism 5 is the same as that of the discharging control component 22, and both achieve precise control and classification of the PCB board through precise mechanical transmission and intelligent control. When the U-shaped connecting frame 2112 without a PCB board rotates to the position directly opposite to the feeding chute plate 31, the automatic feeding mechanism 3 is started. The second motor 34 drives the second gear 35 to rotate. Since the second gear 35 meshes with the third gear 36, the third gear 36 rotates accordingly and drives the rightmost second rack bar 39 meshing with it to move. The second rack bar 39 is fixedly connected to the bottom of the rightmost second PCB board pallet 38. Therefore, the second PCB board pallet 38 slides along the inner wall of the feeding chute plate 31 until it moves to the inside of the U-shaped connecting frame 2112 without a PCB board.As the second PBC board support plate 38 on the far right moves, the remaining second PBC board support plates 38 move leftward in sequence under the action of the columnar pusher rod 310 and the spring 313, realizing the automatic feeding of the PBC board. When the hydraulic push rod 213 pushes or pulls the push plate 215 and the top plate 217 and the turntable 218 on its top move, the L-shaped push rod 424 on the outer wall of the push plate 215 is driven to move synchronously. The movement of the L-shaped push rod 424 further drives the double-jointed rod 423 to rotate around its rotation connection point. Since the top of the rear side of the turning plate 421 is connected to the L-shaped push rod 424 through the double-jointed rod 423, and the bottom of the rear side of the turning plate 421 is rotatably connected to the central axis rod 413, the swing of the double-jointed rod 423 will drive the turning plate 421 to turn around the central axis rod 413, thereby realizing the up-and-down turning control of the high-power microscope 422, so that the high-power microscope 422 can be adjusted according to whether the turntable 218 is rotating or discharging. When the turntable 218 is in the discharging state, at this time the high-power microscope 422 is stored on the inner wall of the storage bin 415. When the turntable 218 is in the rotating state, at this time the high-power microscope 422 turns to directly above the PCB board to conduct a detailed detection of foreign objects under oil on the PCB board.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A vision-based foreign object detection device under the oil of a PCB board, characterized in that: It includes a device housing (1), in the middle of the inner wall of the device housing (1) is fixedly connected with a detection table (2), at the rear side of the top of the device housing (1) is fixedly connected with a high-power microscope control mechanism (4), on the left inner wall of the device housing (1) is fixedly connected with an automatic feeding mechanism (3), and on the right inner wall of the device housing (1) and on the side opposite to the automatic feeding mechanism (3) is fixedly connected with an abnormal PCB board discharging mechanism (5); The device housing (1) includes a housing main body (11), on the front side of the housing main body (11) is provided with a discharging groove (14), on the left side of the housing main body (11) is provided with a feeding groove (12), and on the rear side of the housing main body (11) is provided with a control groove (13); The detection table (2) includes a detection table main body (21), on the front side of the outer wall of the detection table main body (21) is fixedly connected with a discharging control component (22), and the structure of the discharging control component (22) is the same as that of the abnormal PCB board discharging mechanism (5); The automatic feeding mechanism (3) includes a feeding chute plate (31), the outer wall of the feeding chute plate (31) is fixedly connected to the inner wall of the feeding groove (12), the right side of the feeding chute plate (31) extends to the inner wall of the housing main body (11) and at the bottom is fixedly connected with a feeding control bin (32); The high-power microscope control mechanism (4) includes a connecting frame (41), and at the top of the connecting frame (41) is provided with a high-power microscope connecting component (42).

2. The vision-based foreign object detection device under the oil of the PCB board according to claim 1, wherein: In the middle of the left side of the top of the housing main body (11) is fixedly connected with an L-shaped connecting rod (15), on the right side of the L-shaped connecting rod (15) is fixedly connected with a motor (16), the output end of the motor (16) is fixedly connected with a rotating rod (17), the bottom end of the rotating rod (17) is fixedly connected with a rotating bar (18), on the right side of the rotating bar (18) is fixedly connected with a resisting rod (19), and on the left side of the rotating bar (18) is fixedly connected with a sector plate (110).

3. The vision-based foreign object detection device under the oil of the PCB board according to claim 1, characterized in that: The detection table body (21) includes a lifting control column (211). The bottom of the lifting control column (211) is fixedly connected to the middle of the bottom inner wall of the housing body (11). Guide grooves (212) are respectively formed on both sides of the outer wall of the lifting control column (211). A rear guide groove (214) is formed at the rear of the lifting control column (211). A hydraulic push rod (213) is fixedly connected to the bottom inner wall of the lifting control column (211). The top of the hydraulic push rod (213) is fixedly connected to a push plate (215). Push plate sliders (216) are fixedly connected to both sides of the outer wall of the push plate (215). The outer walls of the two push plate sliders (216) are respectively slidably connected to the inner walls of the two guide grooves (212). The top of the push plate (215) is fixedly connected to a top plate (217). A turntable (218) is rotatably connected to the top of the top plate (217). Slide bar grooves (219) are fixedly connected to the inner side of the turntable (218) in an annular array. An axial center turntable (2110) is fixedly connected to the inner sides of the plurality of slide bar grooves (219). The bottom of the axial center turntable (2110) is fixedly connected to an axial center turntable rotating rod (2111). The bottom of the axial center turntable rotating rod (2111) is rotatably connected to the middle of the inner bottom of the top plate (217).

4. The vision-based foreign object detection device under the oil of the PCB board according to claim 3, wherein: U-shaped connecting frames (2112) are fixedly connected to the outer wall of the turntable (218) in an annular array. PBC board support plates (2113) are slidably connected to the inner walls of the plurality of U-shaped connecting frames (2112). Rack bars (2114) are fixedly connected to the bottoms of the plurality of PBC board support plates (2113).

5. The visual-based foreign object detection device under the oil of the PCB board according to claim 1, wherein: The discharge control assembly (22) includes a discharge base (221). A feeding guide plate (222) is fixedly connected to the top of the discharge base (221). The front side of the feeding guide plate (222) extends to the outer wall of the housing body (11) through a discharge slot (14). A driving disc motor (224) is fixedly connected to the right side of the inner wall of the housing body (11) of the feeding guide plate (222). Gear rod connecting blocks (223) are respectively fixedly connected to the left and right sides of the rear side of the feeding guide plate (222). The output end of the driving disc motor (224) is fixedly connected to a driving disc (225). A crawler belt (226) is sleeved on the outer wall of the driving disc (225). A second driving disc (227) is sleeved on the inner wall of the side of the crawler belt (226) away from the driving disc (225). A gear rod (228) is fixedly connected to the left side of the second driving disc (227). The left end of the gear rod (228) extends into the inner sides of the two gear rod connecting blocks (223) and is rotatably connected to the right side of the left gear rod connecting block (223). A gear (229) is fixedly connected to the outer wall of the gear rod (228) extending into the inner sides of the two gear rod connecting blocks (223).

6. The vision-based foreign object detection device for PCB under oil according to claim 1, characterized in that: The left side of the feeding chute plate (31) extends to the outer wall of the housing main body (11), and a triangular support plate (37) is fixedly connected to the bottom. The right side of the triangular support plate (37) is fixedly connected to the left side of the outer wall of the housing main body (11). A feeding gear hinge groove (33) is formed in the left side of the top of the feeding control bin (32). A second motor (34) is fixedly connected to the bottom of the inner wall of the feeding control bin (32). The output end of the second motor (34) is fixedly connected to a second gear (35). A third gear (36) is meshed with the outer wall of the second gear (35). The outer wall of the third gear (36) is rotatably connected to the inner wall of the feeding gear hinge groove (33). A plurality of second PBC board support plates (38) are slidably connected to the inner wall of the feeding chute plate (31). Second rack bars (39) are fixedly connected to the bottoms of the plurality of second PBC board support plates (38). The second rack bar (39) at the bottom of the rightmost second PBC board support plate (38) is meshed with the outer wall of the third gear (36).

7. An under-oil foreign object detection device for PCB boards based on vision according to claim 6, characterized in that: A columnar pushing rod (310) is slidably connected to the left inner wall of the feeding chute plate (31). A cross plate (311) is fixedly connected to the left end of the columnar pushing rod (310). Side sliding rods (312) are fixedly connected to the front and rear sides on the right side of the cross plate (311). The inner sides of the two side sliding rods (312) are slidably connected to the outer wall of the feeding chute plate (31). Springs (313) are fixedly connected to both sides of the right side of the cross plate (311) inside the two side sliding rods (312). The right ends of the two springs (313) are respectively fixedly connected to the front and rear sides of the left side of the feeding chute plate (31). The right end of the columnar pushing rod (310) extends to the inside of the feeding chute plate (31) and is attached to the left side of the leftmost second PBC board support plate (38).

8. The vision-based foreign object detection device under the oil of the PCB board according to claim 1, characterized in that: The connecting frame (41) includes a hinged vertical plate (411). A central shaft rod (413) is fixedly connected to the inner top of the hinged vertical plate (411). Two U-shaped connecting plates (412) are fixedly connected to both the left and right sides of the hinged vertical plate (411). L-shaped support plates (417) are fixedly connected to the outer sides of the two groups of U-shaped connecting plates (412). The bottoms of the two L-shaped support plates (417) are respectively fixedly connected to the left and right sides of the rear side of the top of the housing main body (11). Triangular reinforcement plates (418) are fixedly connected to the bottoms of the two L-shaped support plates (417). The fronts of the two triangular reinforcement plates (418) are fixedly connected to the rear side of the housing main body (11).

9. The vision-based foreign object detection device for PCB under oil according to claim 8, characterized in that: A support block (416) is fixedly connected to the front side of the hinged vertical plate (411). Side connecting plates (414) are fixedly connected to the tops of both the left and right sides of the hinged vertical plate (411). A storage bin (415) is fixedly connected to the inner top of the two side connecting plates (414).

10. The vision-based foreign object detection device under the oil of the PCB board according to claim 1, wherein: The high-power microscope connection assembly (42) includes a flipping plate (421). A high-power microscope (422) is fixedly connected to the front side of the flipping plate (421). The rear side of the flipping plate (421) is designed in a triangular shape. The inner wall of the bottom of the rear side of the flipping plate (421) is rotatably connected to the outer wall of the axial center rod (413). The outer wall of the top of the rear side of the flipping plate (421) is rotatably connected to a bidirectional hinge rod (423). The rear side of the inner side of the bidirectional hinge rod (423) is rotatably connected to an L-shaped push-pull rod (424). The front side of the bottom of the L-shaped push-pull rod (424) extends to the inner wall of the guiding groove (212) through a control groove (13) and a rear guiding groove (214) and is fixedly connected to the outer wall of a push plate (215).

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