Vision-based part defect detection equipment

Abstract

The utility model relates to the technical field of part defect detection, in particular to vision-based part defect detection equipment which comprises a bottom plate, a protective cover is fixedly mounted at the right end of the top of the bottom plate, a PLC control box is fixedly mounted at the left end of the front face of the protective cover, and a fixing frame is fixedly connected to the top of an inner cavity of the protective cover. A CCD camera is fixedly installed at the bottom of the fixing frame, and two rotating rods are movably connected between the left end of the top of an inner cavity of the protective cover and the top of the bottom plate through bearings. Through the cooperation of the structures, the device has the advantage of good detection effect, and solves the problems that the existing part defect detection is carried out outside mostly based on vision, so that part defects are easily irradiated by light rays in other areas during detection, and the detection data are unfavorably influenced; and the problem that the detection result is easy to deviate due to the fact that the transmitted camera is not clear is solved.

Description

Technical Field

[0001] This utility model relates to the field of component defect detection technology, specifically a vision-based component defect detection device. Background Technology

[0002] Part defect inspection refers to the use of various technical means to detect defects on the surface or inside of parts to ensure that the quality and performance of the parts meet standards. These defects may include cracks, scratches, stains, dimensional deviations, etc. These defects not only affect the appearance of the parts but may also seriously affect the function and safety of the product. Therefore, part defect inspection plays a crucial role in manufacturing to ensure that products meet stringent standards.

[0003] Currently, most existing component defect detection methods rely on vision and external observation. However, component defects are easily affected by light from other areas during detection, which can negatively impact the detection data, resulting in unclear images and inaccurate results. Therefore, we propose a vision-based component defect detection device. Utility Model Content

[0004] The purpose of this invention is to provide a vision-based part defect detection device with the advantage of good detection effect. It solves the problem that most existing part defect detection is based on vision and carried out in the outside world. As a result, the part defects are easily affected by the light from other areas during the detection, which will adversely affect the detection data, resulting in unclear transmitted images and easy deviation of the detection results.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vision-based part defect detection device, comprising a base plate, a protective cover fixedly installed at the right end of the top of the base plate, a PLC control box fixedly installed at the left end of the front of the protective cover, a fixed frame fixedly connected to the top of the inner cavity of the protective cover, a CCD camera fixedly installed at the bottom of the fixed frame, two rotating rods movably connected between the left end of the top of the inner cavity of the protective cover and the top of the base plate via bearings, a rotating roller and a drive gear fixedly connected to the outer surface of the rotating rods, and a circulation groove formed on the outer surface of the rotating rollers. A connecting block is movably connected to the lower end of the outer surface of the cylinder. A guide protrusion adapted to the circulating rail groove is fixedly connected to the right side of the inner wall of the connecting block. A baffle plate is fixedly installed on the left side of the connecting block. A fixed seat is fixedly installed at the middle of the top of the bottom plate. A drive motor is fixedly installed on the left side of the fixed seat. A drive threaded rod is fixedly connected to the output end of the drive motor. A moving block is threadedly connected to the left end of the outer surface of the drive threaded rod. A movable seat that slides outside the fixed seat is fixedly installed on the top of the movable block. A positioning seat is fixedly installed on the top of the movable seat. An L-shaped toothed plate that meshes with the drive gear is fixedly connected to the bottom of the movable seat.

[0006] Preferably, a linear light source is fixedly installed at both ends of the inner cavity of the protective cover. There are multiple linear light sources, and the brightness and color of each linear light source are different. At the same time, the input end of each linear light source is connected to the output end wire of the PLC control box through a wire.

[0007] Preferably, the output terminal of the PLC control box is electrically connected to the input terminals of the drive motor and the CCD camera respectively via wires.

[0008] Preferably, the right end of the drive threaded rod is movably connected between the bearing and the right side of the inner cavity of the fixed seat.

[0009] Preferably, an electromagnet is fixedly installed at the bottom of the inner cavity of the positioning seat, and springs are fixedly connected to both the front and rear ends of the bottom of the inner cavity of the positioning seat. An iron plate is fixedly connected to the top of the spring, and a sealing piston is fixedly installed on the top of the iron plate.

[0010] Preferably, a silicone pad is adhered to the top of the positioning seat, and multiple equally spaced adsorption holes are formed between the inner surface of the silicone pad and the inner surface of the top of the positioning seat.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model, through the setting of the positioning seat, allows the part to be tested to be placed on top of the silicone pad and the device to be activated. Then, the electromagnet is energized and attracts the iron plate, compressing the spring. Simultaneously, the iron plate moves, causing the sealing piston to slide downwards within the inner cavity of the positioning seat. This increases the negative pressure at the upper end of the positioning seat's inner cavity. With the assistance of the suction holes, the placed part is attracted to the top of the silicone pad, achieving positioning. Next, the drive motor drives the drive threaded rod to rotate, causing the moving block to move to the right on the outer surface of the drive threaded rod. The movement of the moving block drives the positioning seat, which in turn drives the L-shaped toothed plate to move synchronously. When the plate moves, it drives the rotating rod and rotating drum to rotate via the meshing drive gear. When the rotating drum rotates, it forces the guide protrusion to slide in the circulating track groove. The guide protrusion then drives the connecting block on the outer surface of the rotating drum, causing the baffle plate to move upward and then downward. At this time, the positioning seat moving to the right can smoothly enter the interior of the protective cover through the channel on the left side of the protective cover. After the positioning seat moves to below the CCD camera, the drive motor stops working. At the same time, the baffle plate blocks the channel of the protective cover when it moves downward, so that the parts inside the positioning seat can be inspected inside the protective cover, avoiding the adverse effects of external light on the inspection process of this device.

[0013] 2. By setting up a line light source, the PLC control box can control the line light source to flash sequentially and orderly during CCD camera detection. In conjunction with the CCD camera in operation, this device can complete the detection of multiple images under multiple brightness and multiple color lighting environments in one detection, thereby detecting product surface defects that are difficult to distinguish and improving the detection accuracy of this device. Attached Figure Description

[0014] Figure 1 This is a first-view structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention from a second perspective;

[0016] Figure 3 This is a partial exploded structural diagram of the present invention;

[0017] Figure 4 This utility model Figure 3 Another perspective structural diagram.

[0018] In the diagram: 1. Base plate; 2. Protective cover; 3. PLC control box; 4. Fixed base; 5. Movable base; 6. L-shaped toothed plate; 7. Drive motor; 8. Positioning base; 9. Silicone pad; 10. Adsorption hole; 11. Iron plate; 12. Sealing piston; 13. Electromagnet; 14. Drive threaded rod; 15. Moving block; 16. Baffle plate; 17. Connecting block; 18. Line light source; 19. CCD camera; 20. Fixture; 21. Spring; 22. Rotating rod; 23. Rotating roller; 24. Circulating rail groove; 25. Guide protrusion; 26. Drive gear. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The components of this application, including the base plate 1, protective cover 2, PLC control box 3, fixed seat 4, movable seat 5, L-shaped toothed plate 6, drive motor 7, positioning seat 8, silicone pad 9, adsorption hole 10, iron plate 11, sealing piston 12, electromagnet 13, drive threaded rod 14, moving block 15, shielding plate 16, connecting block 17, line light source 18, CCD camera 19, fixed frame 20, spring 21, rotating rod 22, rotating roller 23, circulating rail groove 24, guide protrusion 25, and drive gear 26, are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0023] Example 1

[0024] Please see Figures 1-4 As shown, this utility model provides a technical solution: a vision-based part defect detection device, including a base plate 1, a protective cover 2 fixedly installed on the right side of the top of the base plate 1, a PLC control box 3 fixedly installed on the left side of the front of the protective cover 2, the output terminal of the PLC control box 3 being electrically connected to the input terminal of the drive motor 7 and the CCD camera 19 respectively via wires, a fixing frame 20 fixedly connected to the top of the inner cavity of the protective cover 2, a CCD camera 19 fixedly installed at the bottom of the fixing frame 20, two rotating rods 22 being movably connected between the left side of the top of the inner cavity of the protective cover 2 and the top of the base plate 1 via bearings, a rotating roller 23 and a drive gear 26 fixedly connected to the outer surface of the rotating rods 22, a circulation groove 24 being formed on the outer surface of the rotating roller 23, a connecting block 17 being movably connected to the lower end of the outer surface of the rotating roller 23, a guide protrusion 25 adapted to the circulation groove 24 being fixedly connected to the right side of the inner wall of the connecting block 17, and a baffle plate fixedly installed on the left side of the connecting block 17. 16. A fixed seat 4 is fixedly installed at the middle of the top of the base plate 1. A drive motor 7 is fixedly installed on the left side of the fixed seat 4. A drive threaded rod 14 is fixedly connected to the output end of the drive motor 7. The right end of the drive threaded rod 14 is movably connected to the right side of the inner cavity of the fixed seat 4 through a bearing. A moving block 15 is threadedly connected to the left end of the outer surface of the drive threaded rod 14. A movable seat 5 that slides on the outside of the fixed seat 4 is fixedly installed on the top of the movable block 15. A positioning seat 8 is fixedly installed on the top of the movable seat 5. An electromagnet 13 is fixedly installed at the bottom of the inner cavity of the positioning seat 8. Springs 21 are fixedly connected to both the front and rear ends of the bottom of the inner cavity of the positioning seat 8. An iron plate 11 is fixedly connected to the top of the springs 21. A sealing piston 12 is fixedly installed on the top of the iron plate 11. A silicone pad 9 is adhered to the top of the positioning seat 8. Multiple equally spaced adsorption holes 10 are opened between the inner surface of the silicone pad 9 and the inner surface of the top of the positioning seat 8. An L-shaped toothed plate 6 that meshes with the drive gear 26 is fixedly connected to the bottom of the movable seat 5.

[0025] This technical solution: By setting the positioning seat 8, the part to be tested is placed on top of the silicone pad 9 and the device is turned on. Then, the electromagnet 13 is energized and attracts the iron plate 11 to compress the spring 21. As the iron plate 11 moves, it drives the sealing piston 12 to slide downward in the inner cavity of the positioning seat 8, thereby increasing the negative pressure at the upper end of the inner cavity of the positioning seat 8. With the assistance of the suction hole 10, the placed part can be attracted to the top of the silicone pad 9 to achieve positioning. Then, the drive motor 7 drives the drive threaded rod 14 to rotate, thereby causing the moving block 15 to move to the right on the outer surface of the drive threaded rod 14. When the moving block 15 moves, it drives the positioning seat 8 to move. When the positioning seat 8 moves, it drives the L-shaped toothed plate 6 to move synchronously. When the L-shaped toothed plate 6 moves, it drives the rotating rod 22 and the rotating drum 23 to rotate through the meshing drive gear 26. When the rotating drum 23 rotates, it forces the guide protrusion 25 to slide in the circulating rail groove 24, thereby guiding the protrusion. 25 drives the connecting block 17 on the outer surface of the rotating drum 23, causing the baffle plate 16 to move upward and then downward. At this time, the positioning seat 8, which moves to the right, can smoothly enter the interior of the protective cover 2 through the channel on the left side of the protective cover 2. After the positioning seat 8 moves below the CCD camera 19, the drive motor 7 stops working. At the same time, the baffle plate 16 blocks the channel of the protective cover 2 when it moves downward, so that the parts inside the positioning seat 8 can be inspected inside the protective cover 2, avoiding the adverse effects of external light on the inspection process of this device. After the inspection is completed, the drive motor 7 rotates in the opposite direction, and with the assistance of the L-shaped toothed plate 6 and the meshing drive gear 26, the baffle plate 16 moves upward and then downward again, so that the positioning seat 8 can exit the protective cover 2 and reset. Finally, the electromagnet 13 is de-energized, and the compressed spring 21 will drive the sealing piston 12 to reset through the iron plate 11, making it convenient for the staff to pick up and put away the parts after the inspection is completed.

[0026] It should be noted that: Based on the CCD machine vision inspection system, the target to be captured is converted into an image signal by the CCD camera 19 and transmitted to a dedicated image processing system. According to the pixel distribution and information such as brightness and color, it is converted into a digital signal. The image system performs various operations on the feedback signal to extract the feature of the target, uses image processing algorithms to perform defect detection and other operations, and then determines the appearance inspection status of the part based on the judgment result.

[0027] Example 2

[0028] Based on Embodiment 1, this utility model is as follows: Figures 1-4 As shown, a number of linear light sources 18 are fixedly installed at both ends of the inner cavity of the protective cover 2. Each linear light source 18 has a different brightness and color. At the same time, the input end of each linear light source 18 is connected to the output end of the PLC control box 3 through a wire.

[0029] This technical solution: By setting the line light source 18, the PLC control box 3 can control the line light source 18 to flash sequentially and orderly during the detection by the CCD camera 19. In conjunction with the CCD camera 19 in operation, this device can complete the detection of multiple images under multiple brightness and multiple color lighting environments in one detection, thereby detecting product surface defects that are difficult to distinguish and improving the detection accuracy of this device.

[0030] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0031] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A vision-based part defect detection apparatus comprising a base plate (1), characterized in that: A protective cover (2) is fixedly installed on the right side of the top of the base plate (1). A PLC control box (3) is fixedly installed on the left side of the front of the protective cover (2). A fixing frame (20) is fixedly connected to the top of the inner cavity of the protective cover (2). A CCD camera (19) is fixedly installed at the bottom of the fixing frame (20). Two rotating rods (22) are movably connected between the left side of the top of the inner cavity of the protective cover (2) and the top of the base plate (1) through bearings. A rotating roller (23) and a drive gear (26) are fixedly connected to the outer surface of the rotating rod (22). A circulation groove (24) is opened on the outer surface of the rotating roller (23). A connecting block (17) is movably connected to the lower end of the outer surface of the rotating roller (23). The connecting block (17) contains... A guide protrusion (25) adapted to the circulating rail groove (24) is fixedly connected to the right side of the wall. A baffle plate (16) is fixedly installed on the left side of the connecting block (17). A fixed seat (4) is fixedly installed at the middle of the top of the bottom plate (1). A drive motor (7) is fixedly installed on the left side of the fixed seat (4). A drive threaded rod (14) is fixedly connected to the output end of the drive motor (7). A moving block (15) is threadedly connected to the left end of the outer surface of the drive threaded rod (14). A movable seat (5) sliding on the outside of the fixed seat (4) is fixedly installed on the top of the movable block (15). A positioning seat (8) is fixedly installed on the top of the movable seat (5). An L-shaped toothed plate (6) meshing with the drive gear (26) is fixedly connected to the bottom of the movable seat (5). The output terminal of the PLC control box (3) is electrically connected to the input terminal of the drive motor (7) and the CCD camera (19) respectively via wires; The right end of the drive threaded rod (14) is movably connected between the bearing and the right side of the inner cavity of the fixed seat (4); An electromagnet (13) is fixedly installed at the bottom of the inner cavity of the positioning seat (8). Springs (21) are fixedly connected to both the front and rear ends of the bottom of the inner cavity of the positioning seat (8). An iron plate (11) is fixedly connected to the top of the spring (21). A sealing piston (12) is fixedly installed on the top of the iron plate (11). When the electromagnet (13) is energized, it attracts the iron plate (11) and compresses the spring (21). As the iron plate (11) moves, it drives the sealing piston (12) to slide downward in the inner cavity of the positioning seat (8), thereby increasing the negative pressure at the upper end of the inner cavity of the positioning seat (8). With the assistance of the adsorption hole (10), the placed parts are adsorbed on the top of the silicone pad (9) to achieve positioning. Then, the drive motor (7) drives the drive threaded rod (14) to rotate, thereby causing the moving block (15) to move to the right on the outer surface of the drive threaded rod (14). When the moving block (15) moves, it drives the positioning seat (8) to move. When the positioning seat (8) moves, it drives the L-shaped toothed plate (6) to move synchronously. When the L-shaped toothed plate (6) moves, it drives the rotating rod (22) and the rotating drum (23) to rotate through the meshing drive gear (26). When the rotating drum (23) rotates, it forces the guide protrusion (25) to slide in the circulating rail groove (24), thereby guiding the protrusion. Block (25) drives connecting block (17) on the outer surface of rotating drum (23) to drive baffle (16) to move upward and then downward. At this time, positioning seat (8) moving to the right can smoothly enter the interior of protective cover (2) through the channel on the left side of protective cover (2). After positioning seat (8) moves below CCD camera (19), drive motor (7) stops working. At the same time, baffle (16) just blocks the channel of protective cover (2) when it moves downward, so that the parts in positioning seat (8) can be tested in protective cover (2). Drive motor (7) rotates in the opposite direction, and with the assistance of L-shaped toothed plate (6) and meshing drive gear (26), baffle (16) moves upward and then downward again, so that positioning seat (8) can exit protective cover (2) and reset. Finally, electromagnet (13) is de-energized, and compressed spring (21) will drive sealing piston (12) to reset through iron plate (11).

2. A vision-based part defect detection apparatus according to claim 1, characterized in that: Line light sources (18) are fixedly installed at both ends of the inner cavity of the protective cover (2). There are multiple line light sources (18), and the brightness and color of each line light source (18) are different. At the same time, the input end of each line light source (18) is connected to the output end wire of the PLC control box (3) through a wire.

3. A vision-based part defect detection apparatus according to claim 1, wherein: A silicone pad (9) is bonded to the top of the positioning seat (8), and multiple equally spaced adsorption holes (10) are provided between the inner surface of the silicone pad (9) and the inner surface of the top of the positioning seat (8).

Images