Defective product removing device based on 3D machine vision

Abstract

The defective product removing device based on the 3D machine vision comprises a conveying assembly installed on the top of a base, a third electric telescopic rod is fixed to the outer wall of the top of the base, a lifting seat is fixed to the output end of the third electric telescopic rod, and the inner wall of the lifting seat is movably connected with a mounting frame through a rotating shaft; a placement plate is fixed to the top of the mounting frame and is driven by a driving part, a connecting rod is fixed to the outer wall of one side of the placement plate, a partition plate is fixed to the end, away from the placement plate, of the connecting rod, and a 3D visual camera is fixed to the side wall of the partition plate. According to the utility model, three-dimensional data of the surface of the workpiece is obtained by the 3D visual camera by utilizing an optical projection or stereo imaging technology, high-precision quality detection is carried out by combining a geometric algorithm and a machine learning algorithm, defects of the workpiece can be accurately identified, defective products and qualified products are efficiently distinguished, and the partition plate moves downwards to isolate adjacent workpieces to avoid detection interference.

Description

Technical Field

[0001] This utility model relates to the field of defective product rejection technology, and in particular to a defective product rejection device based on 3D machine vision. Background Technology

[0002] In industrial production, product quality inspection is a crucial step in ensuring product quality and enhancing enterprise competitiveness. With continuous technological advancements, machine vision technology has been widely applied in industrial quality inspection due to its advantages such as non-contact operation, high precision, and high efficiency. Among these technologies, 3D machine vision, with its ability to acquire three-dimensional data of object surfaces, can comprehensively and accurately inspect the shape, size, and surface defects of workpieces, making it a current research hotspot and development direction in the field of industrial quality inspection.

[0003] However, in actual industrial production lines, workpieces are usually transported in a continuous and closely arranged manner. When 3D machine vision technology is used to inspect workpieces, the proximity or even contact between adjacent workpieces can seriously interfere with the inspection results. Since 3D machine vision technology requires precise three-dimensional data acquisition of the workpiece surface, the presence of adjacent workpieces may prevent the camera from accurately acquiring the complete three-dimensional information of the target workpiece. During data processing, the contours and features of adjacent workpieces may be confused with the data of the target workpiece, thereby affecting the accuracy and reliability of defect identification of the target workpiece.

[0004] Therefore, developing a defective product rejection device based on 3D machine vision is of great practical significance. It can effectively avoid interference from adjacent workpieces to the detection, thereby improving the accuracy and reliability of 3D machine vision detection and providing an efficient and accurate quality inspection and defective product rejection solution for industrial production. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a defective product rejection device based on 3D machine vision.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A defective product rejection device based on 3D machine vision includes a conveying assembly installed on the top of a base. An electric telescopic rod three is fixed to the outer wall of the top of the base, and a lifting seat is fixed to the output end of the electric telescopic rod three. A mounting frame is movably connected to the inner wall of the lifting seat through a rotating shaft. A placement plate is fixed to the top of the mounting frame and is driven by a driving component. A connecting rod is fixed to one outer wall of the placement plate, and a partition plate is fixed to the end of the connecting rod away from the placement plate. A 3D vision camera is fixed to the side wall of the partition plate.

[0008] As a further embodiment of this utility model: the conveying assembly includes a support plate and a conveying roller. The support plate is fixed to the outer wall of the top of the base, and the conveying roller is movably connected between the two support plates. A conveyor belt drives between the two conveying rollers. A drive motor is fixed to one side of the outer wall of the support plate, and the output end of the drive motor is connected to one end of one of the conveying rollers through a coupling.

[0009] As a further embodiment of this utility model: the driving component includes two electric telescopic rods, a middle block and a ball head. Both electric telescopic rods are fixed to the top outer wall of the base, and the middle block is fixed to the output end of the electric telescopic rods by a pin, and the ball head is fixed to the top of the middle block.

[0010] As a further improvement of this utility model: the bottom outer wall of the placement plate is fixed with a limiting slide that cooperates with the ball head, and the outer walls on both sides of the limiting slide are fixed with limiting plates.

[0011] As a further improvement of this utility model: an abutment plate is fixed to the outer wall of the top of the placement plate, and a sponge pad is adhered to the inner wall of one side of the abutment plate.

[0012] As a further embodiment of this utility model: an L-shaped plate is fixed to one side of the outer wall of the contact plate, and an electric telescopic rod is fixed to the top outer wall of the L-shaped plate. The output end of the electric telescopic rod is fixed to a connecting frame by a pin, and a side plate is fixed to the bottom of the connecting frame. A sponge pad is adhered to the inner surface of the side plate.

[0013] As a further improvement of this utility model, an inclined plate is fixed between the two support plates.

[0014] As a further improvement of this utility model, a control panel is fixed to one side of the outer wall of the support plate.

[0015] Compared with the prior art, this utility model provides a defective product rejection device based on 3D machine vision, which has the following beneficial effects:

[0016] 1. By using a 3D vision camera to acquire three-dimensional data of the workpiece surface through optical projection or stereo imaging technology, and combining geometric algorithms and machine learning algorithms for high-precision quality inspection, it can accurately identify workpiece defects, achieve efficient differentiation between defective and qualified products, and the downward movement of the partition plate isolates adjacent workpieces to avoid inspection interference, ensuring the independence of single-piece quality inspection and improving the accuracy and efficiency of quality inspection.

[0017] 2. The contact plate and side plate provide support for the workpiece from the front, back and sides respectively. The sponge pad on the contact plate and the sponge pad on the inner surface of the side plate can play a buffering and protective role when the workpiece slides onto the placement plate and during the sliding process, reducing the damage to the workpiece caused by collision, reducing the defect rate, and ensuring the stability of the workpiece during the sorting process.

[0018] 3. In actual production, conveying components can be set on both sides of the placement plate. Based on the quality inspection results, the placement plate can be tilted in different directions by differential control of the electric telescopic rod, and qualified products and defective products can be transported to the corresponding conveying components respectively. This realizes the integration of quality inspection and sorting processes, making the entire production process more compact and flexible, and improving the degree of production automation and space utilization.

[0019] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a defective product rejection device based on 3D machine vision proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the installation structure of the rejection component of a defective product rejection device based on 3D machine vision proposed in this utility model.

[0022] Figure 3 This is a schematic diagram of the bottom structure of the rejection component of a defective product rejection device based on 3D machine vision proposed in this utility model.

[0023] Figure 4 This is an exploded view of the rejection component of a defective product rejection device based on 3D machine vision proposed in this utility model.

[0024] Figure 5 This is a schematic diagram of the drive component structure of a defective product rejection device based on 3D machine vision proposed in this utility model.

[0025] In the diagram: 1. Base; 2. Support plate; 3. Conveyor roller; 4. Conveyor belt; 5. Drive motor; 6. Divider plate; 7. Inclined plate; 8. Electric telescopic rod one; 9. Contact plate; 10. Electric telescopic rod two; 11. Placement plate; 12. Control panel; 13. L-shaped plate; 14. Mounting bracket; 15. Limiting slide; 16. Electric telescopic rod three; 17. Lifting seat; 18. Connecting rod; 19. Side plate; 20. Sponge pad one; 21. Sponge pad two; 22. Connecting frame; 23. Middle block; 24. Ball head; 25. Limiting plate; 26. 3D vision camera. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example 1

[0028] A defective product rejection device based on 3D machine vision, such as Figures 1 to 5 As shown, the system includes a conveying assembly installed on the top of the base 1, and an electric telescopic rod 16 is fixed to the outer wall of the top of the base 1 by bolts. A lifting seat 17 is fixed to the output end of the electric telescopic rod 16. A mounting frame 14 is rotatably connected to the inner wall of the lifting seat 17 by a rotating shaft. A placement plate 11 is fixed to the top of the mounting frame 14. The placement plate 11 is driven by a driving component. A connecting rod 18 is fixed to one side of the outer wall of the placement plate 11 by screws. A partition plate 6 is fixed to the end of the connecting rod 18 away from the placement plate 11 by screws. A 3D vision camera 26 is fixed to the side wall of the partition plate 6.

[0029] The conveying assembly allows for the transport of workpieces requiring quality inspection. Once the workpiece reaches the inspection point, the drive unit and electric telescopic rod 16 simultaneously move the partition plate 6, placement plate 11, and connecting rod 18 downwards. The downward movement of the partition plate 6 separates adjacent workpieces on the conveying assembly. A 3D vision camera 26 then inspects the workpiece in front of the partition plate 6. The 3D vision camera 26 works by acquiring three-dimensional data of the object's surface through optical projection such as structured light, laser, or stereoscopic imaging technology. Geometric algorithms, such as triangulation and point cloud processing, are used to calculate spatial coordinates and reconstruct the three-dimensional model. Image processing and machine learning algorithms are combined to perform feature analysis, dimensional measurement, and defect identification on the model. Finally, high-precision quality inspection is achieved by comparing the model with a standard model. Its core strength lies in the accuracy of three-dimensional data acquisition, the reliability of geometric calculations, and the intelligence of algorithm analysis. It is suitable for scenarios requiring non-contact three-dimensional measurement, such as industrial manufacturing and automated inspection. Since the working principle of the 3D vision camera 26 is existing technology, it will not be elaborated further here.

[0030] After the 3D vision camera 26 completes the quality inspection of the workpiece, the drive unit and the electric telescopic rod 16 drive the partition plate 6, the placement plate 11 and the connecting rod 18 to move upward and reset. The conveying assembly conveys the inspected workpiece to the placement plate 11. If the workpiece passes the quality inspection, the drive unit drives the mounting frame 14 and the placement plate 11 to rotate along the lifting seat 17 to one side, so that the workpiece that passes the quality inspection slides along the surface of the placement plate 11 to one side of the lifting seat 17 under its own gravity. If the workpiece fails the quality inspection and is classified as a defective product, the drive unit drives the placement plate 11 and the mounting frame 14 to rotate along the lifting seat 17 to the other side, so that the defective workpiece slides along the surface of the placement plate 11 to the other side of the lifting seat 17. In this way, the qualified and defective workpieces are distinguished so that the defective workpieces can be rejected.

[0031] The conveying assembly includes a support plate 2 and a conveying roller 3. The support plate 2 is fixed to the top outer wall of the base 1 by bolts, and the conveying roller 3 is rotatably connected between the two support plates 2. A conveyor belt 4 is driven between the two conveying rollers 3. A drive motor 5 is fixed to one side outer wall of the support plate 2 by bolts, and the output end of the drive motor 5 is connected to one end of one of the conveying rollers 3 through a coupling.

[0032] When it is necessary to transport the workpiece, the workpiece is placed above the conveyor belt 4 by manual labor or a robotic arm. The conveyor belt 4 transports the workpiece that needs to be inspected by the drive motor 5 driving the conveyor roller 3 to rotate.

[0033] An inclined plate 7 is fixed between the two support plates 2 by bolts;

[0034] The inclined plate 7 can be used to connect and transition between the conveying component and the placement plate 11. After the workpiece on the conveying component is inspected, it is conveyed to the inclined plate 7 and then slides down the inclined plate 7 to the top of the placement plate 11.

[0035] The driving component includes an electric telescopic rod 20, an intermediate block 23, and a ball head 24. Both electric telescopic rods 20 are fixed to the top outer wall of the base 1 by bolts, and the intermediate block 23 is fixed to the output end of the electric telescopic rod 20 by pins. The ball head 24 is fixed to the top of the intermediate block 23 by screws. The bottom outer wall of the placement plate 11 is fixed with a limiting slide 15 that works with the ball head 24 by bolts, and the outer walls on both sides of the limiting slide 15 are fixed with limiting plates 25 by screws.

[0036] Before quality inspection, both the placement plate 11 and the partition plate 6 are initially horizontal, with the bottom of the partition plate 6 higher than the conveyor assembly. During quality inspection, the output ends of the two sets of electric telescopic rods 10 and 16 move downwards at the same speed, causing the partition plate 6, placement plate 11, and connecting rod 18 to move downwards. When the bottom of the partition plate 6 moves to be in contact with the upper surface of the conveyor belt 4, the output end of the electric telescopic rod 10 stops moving. At this time, the 3D vision camera 26 is used to inspect the workpiece. After the workpiece quality inspection is completed, the two electric telescopic rods 10 and 16... The output end of the electric telescopic rod 16 moves upward at a constant speed to drive the placement plate 11 to reset. After the conveying assembly transports the inspected workpiece to the placement plate 11 through the inclined plate 7, when it is necessary to drive the placement plate 11 to tilt to one side, the output end of the electric telescopic rod 16 remains stationary, and controls one set of electric telescopic rods 10 to move upward and the other set of electric telescopic rods 10 to move downward. The two sets of electric telescopic rods 10 move at the same speed. During this process, the two ball heads 24 slide along the inner wall of the limiting slide 15, so that the placement plate 11 tilts in one direction.

[0037] The top outer wall of the placement plate 11 is fixed with an abutment plate 9 by screws, and a sponge pad 21 is glued to the inner wall of one side of the abutment plate 9.

[0038] After the workpiece has passed quality inspection, it slides down the inclined plate 7 onto the placement plate 11. The workpiece is blocked by the abutment plate 9, and the sponge pad 21 provides cushioning protection for the workpiece.

[0039] The control panel 12 is fixed to one side of the outer wall of the support plate 2 by bolts.

[0040] The control panel 12 controls the start, stop, and speed of the conveyor belt 4 via a circuit connection to the drive motor 5, enabling flexible adjustment of workpiece conveying. During the quality inspection stage, it controls the 3D vision camera 26 for quality inspection, and simultaneously controls the movement of the electric telescopic rod 10 and the electric telescopic rod 16, driving the partition plate 6 and other components to move down to separate the workpieces and trigger the quality inspection. After completion, it resets. Based on the quality inspection results, it controls the electric telescopic rod 10 to sort qualified and defective products.

[0041] Working principle: The workpiece is placed above the conveyor belt 4 manually or by a robotic arm. The control panel 12 controls the start of the drive motor 5. The output of the drive motor 5 drives one of the conveyor rollers 3 to rotate. Under the transmission action of the two conveyor rollers 3, the conveyor belt 4 transports the workpiece. When the workpiece is transported to the quality inspection point, the control panel 12 controls the outputs of the two sets of electric telescopic rods 10 and 16 to move down at the same speed. The output of the electric telescopic rod 10 drives the ball head 24 to move down through the intermediate block 23. The ball head 24 slides within the limiting slide 15, driving the partition plate 6, the placement plate 11, and the connecting rod 18 to move down simultaneously. As the separator plate 6 moves downwards, when its bottom edge is in contact with the upper surface of the conveyor belt 4, the output end of the electric telescopic rod 10 stops moving. At this point, the separator plate 6 separates two adjacent workpieces on the conveyor assembly. The 3D vision camera 26 inspects the workpieces in front of the separator plate 6. After the 3D vision camera 26 has completed its inspection, the control panel 12 controls the output ends of the two electric telescopic rods 10 and 16 to move upwards at the same speed, driving the separator plate 6, the placement plate 11, and the connecting rod 18 to move upwards and reset. The conveyor assembly continues to convey the inspected workpieces, which slide down the inclined plate 7. At the top of the placement plate 11, the contact plate 9 blocks the workpiece, and the sponge pad 21 cushions and protects the workpiece. If the workpiece passes quality inspection, the control panel 12 controls the output end of the electric telescopic rod 16 to remain stationary, controls the output end of one set of electric telescopic rods 10 to move upward, and the output end of the other set of electric telescopic rods 10 to move downward, with the two electric telescopic rods 10 moving at the same speed. During this process, the two ball heads 24 slide along the inner wall of the limiting slide 15, causing the mounting frame 14 and the placement plate 11 to rotate to one side along the lifting seat 17. The workpiece that has passed quality inspection moves along the placement plate 11 under its own weight. 1. The surface slides to one side of the lifting seat 17. If the workpiece fails the quality inspection and is classified as a defective product, the control panel 12 controls the output end of the electric telescopic rod 3 16 to remain stationary, controls the output end of another set of electric telescopic rod 2 10 to move upward, and the output end of the previously moved electric telescopic rod 2 10 moves downward. The two electric telescopic rod 2 10 output ends move at the same speed, so that the placement plate 11 and the mounting bracket 14 rotate along the lifting seat 17 to the other side. The defective workpiece slides along the surface of the placement plate 11 to the other side of the lifting seat 17, thereby realizing the distinction between qualified and defective workpieces, so as to remove the defective workpiece.

[0042] Example 2

[0043] A defective product rejection device based on 3D machine vision, designed to protect the workpiece, such as... Figures 1 to 5As shown, this embodiment makes the following additions based on embodiment 1: an L-shaped plate 13 is fixed to one side of the outer wall of the contact plate 9 by bolts, and an electric telescopic rod 8 is fixed to the top outer wall of the L-shaped plate 13 by bolts. The output end of the electric telescopic rod 8 is fixed to a connecting frame 22 by pins, and a side plate 19 is fixed to the bottom of the connecting frame 22 by screws. A sponge pad 20 is adhered to the inner surface of the side plate 19.

[0044] Side plate 19 and sponge pad 20 can support the placement plate 11 from the side. When the placement plate 11 tilts to one side, the workpiece slides along the placement plate 11. The sponge pad 20 cushions the workpiece. When the workpiece and the sponge pad 20 are in contact, the electric telescopic rod 8 drives the side plate 19 and sponge pad 20 to move upward, so that the side plate 19 and sponge pad 20 no longer block the workpiece and the workpiece slides off the placement plate 11. In the actual production process, conveying components can be set on both sides of the placement plate 11 to convey the workpieces that pass or fail the quality inspection separately.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A 3D machine vision based blemished product rejection apparatus comprising a conveying assembly mounted on top of a base (1), characterized in that, An electric telescopic rod three (16) is fixed on the top outer wall of the base (1), and a lifting seat (17) is fixed at the output end of the electric telescopic rod three (16). An installation frame (14) is movably connected to the inner wall of the lifting seat (17) through a rotating shaft. A placement plate (11) is fixed on the top of the installation frame (14), and the placement plate (11) is driven by a driving component. A connecting rod (18) is fixed on one side outer wall of the placement plate (11), and a partition plate (6) is fixed at the end of the connecting rod (18) away from the placement plate (11). A 3D vision camera (26) is fixed on the side wall of the partition plate (6).

2. The 3D machine vision-based blemished product rejection device of claim 1, wherein, The conveying assembly includes a support plate (2) and a conveying roller (3). The support plate (2) is fixed to the top outer wall of the base (1), and the conveying roller (3) is movably connected between the two support plates (2). A conveyor belt (4) is driven between the two conveying rollers (3). A drive motor (5) is fixed to one side of the outer wall of the support plate (2), and the output end of the drive motor (5) is connected to one end of one of the conveying rollers (3) through a coupling.

3. The 3D machine vision-based blemished product rejection apparatus according to claim 1, wherein, The driving component includes an electric telescopic rod two (10), an intermediate block (23) and a ball head (24). Both electric telescopic rod two (10) are fixed to the top outer wall of the base (1), and the intermediate block (23) is fixed to the output end of the electric telescopic rod two (10) by a pin, and the ball head (24) is fixed to the top of the intermediate block (23).

4. The blemished product removing device based on 3D machine vision according to claim 3, characterized in that, The bottom outer wall of the placement plate (11) is fixed with a limiting slide (15) that works with the ball head (24), and the outer walls on both sides of the limiting slide (15) are fixed with limiting plates (25).

5. The 3D machine vision-based blemished product rejection apparatus according to claim 1, wherein, The top outer wall of the placement plate (11) is fixed with an abutment plate (9), and a sponge pad (21) is adhered to the inner wall of one side of the abutment plate (9).

6. The 3D machine vision-based blemished product rejection device of claim 5, wherein, An L-shaped plate (13) is fixed to one side of the outer wall of the contact plate (9), and an electric telescopic rod (8) is fixed to the top outer wall of the L-shaped plate (13). The output end of the electric telescopic rod (8) is fixed to a connecting frame (22) by a pin. A side plate (19) is fixed to the bottom of the connecting frame (22), and a sponge pad (20) is adhered to the inner surface of the side plate (19).

7. The 3D machine vision-based blemished product rejection apparatus according to claim 2, wherein, An inclined plate (7) is fixed between the two support plates (2). 8.The defect removing device based on 3D machine vision of claim 7, wherein, A control panel (12) is fixed to one side of the outer wall of the support plate (2).

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