An automatic visual detection device for bottle cap defects

Abstract

The application discloses a kind of bottle cap defect automatic vision detection devices, belong to vision detection field.A kind of bottle cap defect automatic vision detection device, comprising: detector, the detector is equipped with the conveyor belt for equal-interval conveying bottle cap body, the side of the detector is equipped with controller, further comprising: to the annular platform of bottle cap body ring transport, the outer side of the annular platform is fixedly connected with rotating ring;Rotary disc, rotation is arranged on the detector, and the rotary disc is coaxially arranged with annular platform, and a plurality of detection components for photographing detection to bottle cap body are provided on the rotary disc;The application effectively improves the detection efficiency of bottle cap body, and can avoid the appearance of trailing phenomenon under high speed, in addition, the adaptability of different end surface bottle cap body can be detected, to improve its applicability.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, and in particular to an automatic visual inspection device for bottle cap defects. Background Technology

[0002] In the food, beverage, and pharmaceutical packaging industries, bottle caps are a crucial component for sealing containers, and their appearance quality directly affects the packaging safety and aesthetics of the product. Common bottle cap defects include edge burrs, cracks, surface scratches, poor printing, and unevenness on the end face. With the increasing level of production automation, traditional methods relying on manual visual sampling inspection can no longer meet the requirements of large-scale assembly line production for inspection efficiency and accuracy.

[0003] Therefore, a visual inspection device is needed. Its main working principle is to take a picture of the bottle cap and then analyze it with the system to determine whether it is qualified. However, current visual inspection equipment generally uses a fixed shooting mechanism and a rotating or moving mechanism to move the bottle cap under the shooting mechanism. The current detection speed is low, which will affect its detection efficiency. However, when the detection speed is increased, the bottle cap moves at high speed under the shooting mechanism, which may cause a ghosting phenomenon. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automatic visual inspection device for bottle cap defects that can overcome or at least partially solve the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automatic visual inspection device for bottle cap defects includes: an inspection instrument equipped with a conveyor belt for conveying bottle cap bodies at equal intervals, and a controller on one side of the inspection instrument; an annular platform for circumferentially conveying the bottle cap bodies, with a rotating ring fixedly connected to the outer side of the annular platform; a rotating disk rotatably mounted on the inspection instrument and coaxially arranged with the annular platform, the rotating disk being equipped with multiple inspection components for photographing and inspecting the bottle cap bodies; a feeding component mounted on the inspection instrument, used to push the bottle cap bodies on the conveyor belt onto the annular platform; and an air blowing mechanism located inside the inspection instrument, used to blow away the inspected bottle cap bodies.

[0006] In a preferred embodiment of the present invention, the detection component includes a plurality of mounting frames that are circumferentially fixedly connected to a rotating disk, and the mounting frames are symmetrically provided with an imaging mechanism and a supplementary lighting mechanism.

[0007] In a preferred embodiment of the present invention, an electric telescopic rod is provided between the supplementary lighting mechanism and the mounting frame.

[0008] In a preferred embodiment of the present invention, the feeding assembly includes a telescopic cylinder disposed within the detector, and the telescopic cylinder is inclined, with a top plate fixedly connected to the telescopic end of the telescopic cylinder.

[0009] In a preferred embodiment of the present invention, a plurality of blocks are fixedly connected at equal intervals around the annular platform. Each block is provided with a discharge port, and a limiting plate is symmetrically and rotatably connected to the discharge port. Each block is provided with a micro motor for driving the limiting plate to rotate. The two limiting plates are used to limit the bottle cap body. The side of the block near the limiting plate is symmetrically provided with an inclined surface.

[0010] In a preferred embodiment of the present invention, a retaining ring is provided on the annular platform, and the retaining ring is provided with a plurality of arc-shaped guide surfaces corresponding to the retaining blocks.

[0011] In a preferred embodiment of the present invention, the air blowing mechanism includes an annular cavity disposed within a retaining ring, and a plurality of air supply pipes communicating with the annular cavity are fixedly connected to the rotating disk. A sealing ring is rotatably connected to the inner side of the retaining ring, and the sealing ring is connected to the air supply pipes. A plurality of communication ports communicating with the annular cavity are provided inside the retaining ring, and an air jet port is provided on the arc-shaped guide surface.

[0012] In a preferred embodiment of the present invention, a plurality of jet nozzles are provided along an arc-shaped guide surface, and the plurality of jet nozzles are arranged at equal intervals.

[0013] In a preferred embodiment of the present invention, an electromagnetic valve is provided in the communication port, and the annular cavity is divided into a plurality of small cavities corresponding to the arc-shaped guide surface.

[0014] In a preferred embodiment of the present invention, the detector is provided with a guide rail, and the guide rail is provided with two conveying tunnels.

[0015] Compared with the prior art, the present invention provides an automatic visual inspection device for bottle cap defects, which has the following beneficial effects: 1. The automatic visual inspection device for bottle cap defects uses a feeding mechanism to transport the bottle cap body to a ring platform. Then, the rotating ring and the rotating disk rotate synchronously to achieve synchronous movement of the inspection component and the bottle cap body, keeping them relatively stationary. The inspection component then performs image inspection. At this time, the inspection speed can be appropriately increased, and at high speeds, the ghosting phenomenon can be avoided, effectively improving the inspection efficiency of the bottle cap body.

[0016] 2. This automatic visual inspection device for bottle cap defects inspects the bottle cap body by taking multiple shots through the shooting mechanism. Especially for bottle cap bodies with concave or sloping surfaces on the upper end, the controller can control the shooting mechanism to take pictures at a designated position, such as taking three pictures. During the interval between the three pictures, the supplementary lighting angle of the supplementary lighting mechanism can be adjusted by the electric telescopic rod, thereby avoiding the occurrence of supplementary lighting dead zones that affect the comprehensive inspection of the bottle cap body.

[0017] 3. This automatic visual inspection device for bottle cap defects sets the rotation speed of the annular platform to twice that of the rotating disk, thereby reducing the moving speed of the bottle cap body relative to the imaging mechanism and the supplementary lighting mechanism by 50%. This avoids the phenomenon of ghosting under high-speed inspection. In addition, by adjusting the supplementary lighting mechanism to a suitable position through an electric telescopic rod, and by performing multiple inspections on the planar reflective bottle cap body in different directions, the influence of local bright spots can be reduced, thereby improving the inspection accuracy.

[0018] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention effectively improves the detection efficiency of bottle cap bodies and avoids ghosting at high speeds. In addition, it can perform adaptability testing on bottle cap bodies with different end faces, thereby improving their applicability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is the front view of the present invention; Figure 3 This is the left view of the present invention; Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the detection component in this invention; Figure 6 This is a cross-sectional view of the detection component in this invention. Figure 1 ; Figure 7 This is a cross-sectional view of the detection component in this invention. Figure 2 ; Figure 8 For the present invention Figure 7 An enlarged schematic diagram of part A in the middle; Figure 9 This is a schematic diagram of the structure of the stop block in this invention; Figure 10 This is a schematic diagram of the structure of the bottle cap body in the feeding state in this invention; Figure 11 This is a flowchart illustrating the process of detecting a completely flat and reflective bottle cap using the main unit of this invention.

[0020] In the diagram: 1. Detector; 101. Controller; 102. Conveyor belt; 103. Guide rail; 104. Telescopic cylinder; 105. Top plate; 2. Rotary disc; 201. Mounting frame; 202. Imaging mechanism; 203. Lighting mechanism; 204. Electric telescopic rod; 3. Rotating ring; 301. Annular platform; 302. Retaining ring; 303. Arc-shaped guide surface; 304. Air nozzle; 305. Annular cavity; 306. Air supply pipe; 307. Sealing ring; 308. Connecting port; 309. Solenoid valve; 4. Stop block; 401. Discharge port; 402. Limiting plate; 403. Micro motor; 5. Bottle cap body. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Example: Refer to Figures 1-4 An automatic visual inspection device for bottle cap defects includes: an inspection instrument 1, a conveyor belt 102 for conveying bottle cap bodies 5 at equal intervals on the inspection instrument 1, and a controller 101 on one side of the inspection instrument 1. A ring platform 301 is used for the ring conveying of the bottle cap body 5. A rotating ring 3 is fixedly connected to the outer side of the ring platform 301. The feeding assembly is mounted on the detector 1 and is used to push the bottle cap body 5 on the conveyor belt 102 onto the annular platform 301. An air blowing mechanism is installed inside the detector 1, and the air blowing mechanism is used to blow off the bottle cap body 5 after the test is completed; In a specific implementation, when inspecting the bottle cap body 5, the bottle cap body 5 is first transported to a designated position by the conveyor belt 102 in an equidistant arrangement. Then, it is pushed onto the ring platform 301 by the feeding component. The bottle cap body 5 is inspected by the inspection component. Finally, the qualified and unqualified ones are blown to the corresponding positions by the air blowing mechanism. In this inspection process, the inspection components are currently fixed. In order to ensure the clarity of the image, the overall inspection speed is generally low. On the other hand, when the inspection speed increases, phenomena such as ghosting may occur, which will affect the inspection effect. To solve the above problems, the following implementation methods can be adopted, with reference to... Figure 5 It also includes: a rotating disk 2, which is rotatably mounted on the detector 1, and the rotating disk 2 is coaxially mounted with the annular platform 301. The rotating disk 2 is equipped with multiple detection components for taking pictures and detecting the bottle cap body 5.

[0023] In a specific implementation, when high-speed detection of the bottle cap body 5 is required, the bottle cap body 5 is transported to the annular platform 301 by the feeding mechanism. Then, the rotating ring 3 and the rotating disk 2 rotate synchronously to realize the synchronous movement of the detection component and the bottle cap body 5, keeping them relatively stationary. Then, the detection component performs image detection. At this time, the detection speed can be appropriately increased, and at high speed, the ghosting phenomenon can be avoided, and the detection efficiency of the bottle cap body 5 can be effectively improved.

[0024] Reference Figure 6 The detection component includes multiple mounting brackets 201 that are fixedly connected to the rotating disk 2 in a circular pattern. The mounting brackets 201 are symmetrically equipped with a shooting mechanism 202 and a supplementary lighting mechanism 203.

[0025] During actual shooting, the shooting mechanism 202 is used for shooting, and the ring-shaped supplementary lighting mechanism 203 provides supplementary lighting to improve the clarity of the shooting and avoid shadows that may affect the detection effect.

[0026] In a preferred embodiment, an electric telescopic rod 204 is provided between the supplementary lighting mechanism 203 and the mounting bracket 201.

[0027] The bottle cap body 5 is inspected by taking multiple shots through the shooting mechanism 202. In particular, for bottle cap bodies 5 with concave and sloping surfaces on the upper surface, the shooting mechanism 202 can be controlled by the controller 101 to take shots at a designated position, such as three shots. During the interval between the three shots, the supplementary lighting angle of the supplementary lighting mechanism 203 can be adjusted by the electric telescopic rod 204, thereby avoiding the occurrence of supplementary lighting dead zones that affect the comprehensive inspection of the bottle cap body 5.

[0028] When inspecting the bottle cap body 5, which has a completely flat and reflective upper surface, refer to... Figure 10 This is a structural diagram of the material feeding state, for reference. Figure 11 The images are, in order: a completed loading state diagram, a first photograph of the bottle cap body 5a, a second photograph of the bottle cap body 5a, a third photograph of the bottle cap body 5a, and a first photograph of the bottle cap body 5b, a second photograph of the bottle cap body 5b, and a third photograph of the bottle cap body 5b. For simplicity, they are described as the following states. Figure 1 ,state Figure 2 ,state Figure 3 ,state Figure 4 ,state Figure 5 and state Figure 6In practical implementation, the rotational speed of the annular platform 301 is twice that of the rotating disk 2, thereby reducing the moving speed of the bottle cap body 5 on the annular platform 301 relative to the shooting mechanism 202 and the supplementary lighting mechanism 203 by 50%, thus avoiding the ghosting phenomenon under high-speed detection. In addition, the supplementary lighting mechanism 203 is adjusted to a suitable position by means of the electric telescopic rod 204. By performing multiple detections on the planar reflective bottle cap body 5 in different directions, the influence of local bright spots can be reduced, thereby improving its detection accuracy. Furthermore, in actual use, the rotating ring 3 and the rotating disk 2 are connected by two output ends of a gear-type gearbox, which can adjust their relative moving speed and is driven by the same input source, thus improving detection accuracy.

[0029] To achieve more precise material feeding, the following implementation method can be adopted, please refer to... Figure 10 The feeding assembly includes a telescopic cylinder 104 installed inside the detector 1, and the telescopic cylinder 104 is inclined. The telescopic end of the telescopic cylinder 104 is fixedly connected to a top plate 105.

[0030] In a specific implementation, the reciprocating movement of the telescopic cylinder 104 is used to push the bottle cap body 5 towards the bottle cap body 5. The top plate 105 pushes the bottle cap body 5 onto the annular platform 301. In addition, the telescopic cylinder 104 is tilted, which can greatly reduce the inertial influence of the bottle cap body 5 on the annular platform 301.

[0031] In a preferred embodiment, refer to Figure 5 and Figure 9 On the annular platform 301, multiple blocks 4 are fixedly connected at equal intervals around the circumference. Each block 4 has a discharge port 401, and a limiting plate 402 is symmetrically and rotatably connected to the discharge port 401. Each block 4 is equipped with a micro motor 403 for driving the limiting plate 402 to rotate. The two limiting plates 402 are used to limit the bottle cap body 5. The side of the block 4 near the limiting plate 402 is symmetrically provided with an inclined surface.

[0032] In practice, the bottle cap body 5 is limited by setting a stop 4 and a limiting plate 402. Specifically for the high-speed rotating annular platform 301, the bottle cap body 5 enters between the two limiting plates 402 along the inclined surface of the stop 4 under the action of centrifugal force, keeping it in the same position, thereby ensuring stability during shooting and detection.

[0033] Furthermore, a retaining ring 302 is provided on the annular platform 301, and a plurality of arc-shaped guide surfaces 303 corresponding to the retaining block 4 are provided on the retaining ring 302.

[0034] In a specific implementation, when the bottle cap body 5 is pushed onto the annular platform 301 by the push plate 105, especially under high-speed detection, the bottle cap body 5 may come into contact with the arc-shaped guide surface 303. The arc-shaped guide surface 303 has a certain constraint effect on its position, and under the action of subsequent centrifugal force, it will cause the bottle cap body 5 to enter between the two limiting plates 402 for limiting, thereby effectively ensuring the positioning effect of the bottle cap body 5 and preventing its inaccurate position from affecting the final detection effect.

[0035] Specifically, refer to Figure 7 and Figure 8 The air blowing mechanism includes an annular cavity 305 disposed within a retaining ring 302. A plurality of air supply pipes 306 connected to the annular cavity 305 are fixedly connected to the rotating disk 2. A sealing ring 307 is rotatably connected to the inner side of the retaining ring 302. The sealing ring 307 is connected to the air supply pipes 306. A plurality of communication ports 308 connected to the annular cavity 305 are provided inside the retaining ring 302. An air jet port 304 is provided on the arc-shaped guide surface 303.

[0036] During implementation, air is supplied to the air supply pipe 306 through an external air supply component. The air supply pipe 306 supplies air to the annular cavity 305 through the sealing ring 307, and then enters the annular cavity 305 through the jet nozzle 304. The gas is ejected through the jet nozzle 304, applying a force away from the axis of the annular platform 301 to the bottle cap body 5. When it reaches the designated position, the micro motor 403 drives the limiting plate 402 to rotate, so that the bottle cap body 5 after the inspection is completed moves along the discharge port 401 and enters the designated position. The positions entered by qualified and unqualified bottle cap bodies 5 are different, so as to achieve the sorting effect.

[0037] Reference Figure 5 Multiple jet nozzles 304 are provided along the arc-shaped guide surface 303, and the multiple jet nozzles 304 are arranged at equal intervals.

[0038] In a specific embodiment, multiple air jets 304 are arranged in an arc shape, which can provide a stable blowing direction for the bottle cap body 5 and avoid blowing off-center. When the push plate 105 pushes the bottle cap body 5, the bottle cap body 5 moves towards the arc-shaped guide surface 303. At this time, the airflow blown out by the air jets 304 can quickly assist the movement of the bottle cap body 5 between the two limiting plates 402, and can prevent the bottle cap body 5 from colliding with the arc-shaped guide surface 303 or reduce the contact force between the bottle cap body 5 and the arc-shaped guide surface 303.

[0039] In a preferred embodiment, refer to Figure 8 The communication port 308 is equipped with a solenoid valve 309, and the annular cavity 305 is divided into multiple small cavities corresponding to the arc-shaped guide surface 303.

[0040] The annular cavity 305 is divided into multiple small cavities, and with the design of the solenoid valve 309, the air jet 304 on the corresponding arc guide surface 303 of each small cavity can be used to spray air within a designated area, reducing gas loss. A position sensor is provided at each arc guide surface 303 to achieve a positioning effect, thereby enabling it to open or close at a designated position. In specific implementation, the solenoid valve 309 at the feeding position can be opened when the telescopic cylinder 104 starts to reset, which can prevent the bottle cap body 5 from shifting, improve its feeding accuracy, and enable it to quickly reach the designated position.

[0041] Reference Figure 4 The detector 1 is equipped with a guide rail 103, and the guide rail 103 has two conveying tunnels.

[0042] The system features two conveying tunnels, one for qualified products and the other for defective products, allowing for the separate conveying of qualified and defective bottle cap bodies 5.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic visual inspection device for bottle cap defects, comprising: The detector (1), which is equipped with a conveyor belt (102) for conveying bottle cap bodies (5) at equal intervals, and a controller (101) is provided on one side of the detector (1), is characterized in that it further includes: A ring platform (301) for the ring conveying of the bottle cap body (5) is provided, and a rotating ring (3) is fixedly connected to the outer side of the ring platform (301). Rotary disk (2) is rotatably mounted on the detector (1), and the rotating disk (2) is coaxially mounted with the annular platform (301). The rotating disk (2) is provided with multiple detection components for taking pictures of the bottle cap body (5). A feeding assembly is provided on the detector (1), and the feeding assembly is used to push the bottle cap body (5) on the conveyor belt (102) onto the annular platform (301); An air blowing mechanism is installed inside the detector (1), and the air blowing mechanism is used to blow off the bottle cap body (5) after the test is completed.

2. The automatic visual inspection device for bottle cap defects according to claim 1, characterized in that, The detection component includes multiple mounting brackets (201) that are fixedly connected in a circular pattern on the rotating disk (2). The mounting brackets (201) are symmetrically provided with a shooting mechanism (202) and a supplementary lighting mechanism (203).

3. The automatic visual inspection device for bottle cap defects according to claim 2, characterized in that, An electric telescopic rod (204) is provided between the supplementary lighting mechanism (203) and the mounting frame (201).

4. The automatic visual inspection device for bottle cap defects according to claim 1, characterized in that, The feeding assembly includes a telescopic cylinder (104) installed in the detector (1), and the telescopic cylinder (104) is inclined. The telescopic end of the telescopic cylinder (104) is fixedly connected to a top plate (105).

5. The automatic visual inspection device for bottle cap defects according to claim 1, characterized in that, The annular platform (301) has multiple blocks (4) fixedly connected at equal intervals around its circumference. Each block (4) has a discharge port (401) and a limiting plate (402) is symmetrically and rotatably connected to the discharge port (401). Each block (4) has a micro motor (403) for driving the limiting plate (402) to rotate. The two limiting plates (402) are used to limit the bottle cap body (5). Each block (4) has an inclined surface symmetrically provided on the side of the block (4) near the limiting plate (402).

6. The automatic visual inspection device for bottle cap defects according to claim 5, characterized in that, The annular platform (301) is provided with a retaining ring (302), and the retaining ring (302) is provided with a plurality of arc-shaped guide surfaces (303) corresponding to the retaining block (4).

7. The automatic visual inspection device for bottle cap defects according to claim 6, characterized in that, The air blowing mechanism includes an annular cavity (305) disposed in a retaining ring (302). A plurality of air supply pipes (306) communicating with the annular cavity (305) are fixedly connected to the rotating disk (2). A sealing ring (307) is rotatably connected to the inner side of the retaining ring (302). The sealing ring (307) is connected to the air supply pipe (306). A plurality of communication ports (308) communicating with the annular cavity (305) are provided in the retaining ring (302). An air jet port (304) is opened on the arc-shaped guide surface (303).

8. The automatic visual inspection device for bottle cap defects according to claim 7, characterized in that, Multiple air jets (304) are provided along the arc-shaped guide surface (303), and the multiple air jets (304) are arranged at equal intervals.

9. The automatic visual inspection device for bottle cap defects according to claim 7, characterized in that, The communication port (308) is equipped with a solenoid valve (309), and the annular cavity (305) is divided into multiple small cavities corresponding to the arc-shaped guide surface (303).

10. The automatic visual inspection device for bottle cap defects according to claim 1, characterized in that, The detector (1) is equipped with a guide rail (103), and the guide rail (103) is equipped with two conveying tunnels.

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