A vision aid reject device for packaging defect detection

Abstract

The utility model relates to a kind of vision auxiliary rejection devices for packaging defect detection, including conveying support and conveying mechanism, including conveyor belt;Coding mechanism includes laser coding machine;Visual inspection mechanism includes vision detection module and image processing module, vision detection module is used to carry out image information acquisition to packaging, image processing module is used to handle and defect analysis identification to received image information;Rejection mechanism includes flexible rejection component and defective product receiving table, flexible rejection component includes installation box and the flexible rod of retractable connection in installation box, flexible rod is arranged in oblique line shape from short to long along the conveying direction of conveyor belt;The setting direction of defective product receiving table is perpendicular to conveying support.The utility model can form guiding type steady rejection to packaging product, avoid the dumping and breakage of defective product, and can blow and remove liquid attached to packaging, make coding more clear, reduce the rejection burden caused by coding defect.

Description

Technical Field

[0001] This utility model relates to the field of packaging defect detection technology, specifically a visual-assisted rejection device for packaging defect detection. Background Technology

[0002] Visual inspection uses machines to detect product defects instead of human eyes. In the food industry, it can detect product appearance defects such as liquid level, coding, appearance size, and character recognition. Visual inspection can quickly and accurately identify defective products, improving production efficiency and product quality.

[0003] Patent CN215656500U discloses a visual inspection device for outer packaging quality, specifically disclosing that "a rejection cylinder is disposed on one side of the support frame, and the rejection cylinder is used to reject defective products. The rejection cylinder is also equipped with a solenoid valve, which is used to control the extension and retraction of the rejection cylinder." The rejection structure in this device adopts a straight-kick rejection method. Straight-kick rejection structures usually have a relatively large impact force, which can easily cause products to tip over when rejecting defective products, especially glass bottles. After tipping over, they are prone to breakage, affecting production efficiency. At the same time, the patterns on some products are relatively fragile, and direct rejection can easily damage the packaging patterns, affecting packaging quality.

[0004] On the other hand, after bottled liquids are filled, there may be dripping on the bottle body. If the coding is applied to a place where liquid is attached, the coding will be unclear, resulting in an increased coding defect rate. This will increase the number of products that need to be rejected in the subsequent rejection process, thereby increasing the burden on the rejection equipment and the workload of employees in handling defective products. Utility Model Content

[0005] The purpose of this invention is to provide a visually assisted rejection device for detecting packaging defects, so as to at least partially solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A visually-assisted rejection device for packaging defect detection is characterized by comprising a conveyor support, a conveying mechanism, a coding mechanism, and a visual inspection mechanism. The conveying mechanism, including a conveyor belt, is connected to the top of the conveyor support along its length. The coding mechanism, connected to the conveyor support, includes a laser coding machine for packaging coding. The visual inspection mechanism, connected to the conveyor support and located at the rear end of the coding mechanism, includes a visual inspection module and an image processing module. The visual inspection module is used to acquire image information from the packaging, and the image processing module, connected to the visual inspection module, is used to process the received image information and perform defect analysis and identification. The rejection mechanism includes a flexible rejection component connected to the conveyor support and a defective product receiving platform corresponding to the position of the flexible rejection component. The flexible rejection component includes a mounting box constructed as a rectangle and several flexible rods retractably connected to one end of the mounting box. The flexible rods are arranged diagonally from shortest to longest along the conveying direction of the conveyor belt. The defective product receiving platform is connected to the conveyor support and is positioned perpendicular to the conveyor support.

[0008] In a preferred embodiment, the conveying mechanism further includes a bottle-separating screw disposed at the front end of the transmission belt conveyor. The bottle-separating screw separates the packages at equal intervals, enabling the packages to be conveyed in an orderly manner.

[0009] In a preferred embodiment, the visual inspection module includes a first mounting bracket, an inspection camera connected to the first mounting bracket, and a light source connected to the top of the inspection camera.

[0010] In a preferred embodiment, the first mounting bracket is configured as a height-adjustable lead screw drive structure. This structure allows the vision inspection module to be adapted to packaged products of different heights.

[0011] In a preferred embodiment, the flexible rod is driven by corresponding cylinders fixedly connected within the mounting box.

[0012] In a preferred embodiment, the end of the flexible rod is further connected to a cushioning pad made of elastic material. The cushioning pad contacts the packaged product, preventing damage to its surface pattern.

[0013] In a preferred embodiment, the coding mechanism further includes a blowing module disposed at the front end of the laser coding machine. The blowing module includes a second sensor fixedly connected to the conveyor bracket and a blowing nozzle connected to the conveyor bracket via the blowing bracket. The blowing module can prevent coding defects caused by liquid adhesion to the outer wall of the packaging bottle, thereby reducing the workload of the rejection equipment.

[0014] In a preferred embodiment, the purging nozzle is configured as a fan-shaped structure, which increases the purging area of ​​the bottle and ensures that the liquid in the bottle is completely purged.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The visual-assisted rejection device for packaging defect detection provided by this utility model adopts a flexible rejection structure, which can guide and stably reject packaged products, avoid the tipping and damage of defective products, and improve rejection efficiency and accuracy; and the elastic buffer pad added to the end of the flexible rod increases the contact area with the bottle body and makes a soft contact to avoid damage to the printed pattern on the packaging.

[0017] 2. By adding a blowing module before the coding operation, the liquid attached to the packaging bottle can be blown away and removed, making the coding clearer and reducing the excessive rejection burden caused by coding defects;

[0018] 3. By setting a lead screw drive structure with scale indication in the vision inspection module, it can be applied to packaging products of different specifications and save the repeated debugging time required for switching between different products. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the visual-assisted rejection device for packaging defect detection in this embodiment of the present invention.

[0020] Figure 2 This is a top view of the visually assisted rejection device in an embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the visual detection module in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the lead screw mounting bracket in an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the flexible rejection component in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the buffer pad in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the purging module in an embodiment of the present invention.

[0026] The meanings of the labels in the diagram are as follows:

[0027] 1. Conveying bracket; 11. Guardrail; 2. Conveying mechanism; 21. Conveyor belt; 22. Bottle separating screw; 31. Laser marking machine; 32. Blowing module; 321. Second sensor; 322. Blowing nozzle; 4. Visual inspection module; 41. First mounting bracket; 411. Handwheel; 412. Screw mounting bracket; 413. Scale coating; 42. Inspection camera; 43. Light source; 44. Light source position adjustment plate; 45. First sensor; 46. Fixed base; 5. Image processing module; 6. Rejection mechanism; 61. Flexible rejection component; 611. Mounting box; 612. Flexible rod; 613. Buffer pad; 62. Defective product receiving table. Detailed Implementation

[0028] 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.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0030] Example 1

[0031] See Figures 1-2 This embodiment discloses a visually assisted rejection device for detecting packaging defects. The packaging in this embodiment includes, but is not limited to, packaging structures such as packaging bottles, packaging bags, and packaging boxes. The following uses a packaging bottle as an example to describe this embodiment in detail.

[0032] In this embodiment, the visually assisted rejection device includes a conveying bracket 1 and a conveying mechanism 2, a coding mechanism, a visual inspection mechanism, and a rejection mechanism 6 connected through the conveying bracket 1.

[0033] The conveyor support 1 is constructed as the supporting carrier of this device and is built with aluminum alloy profiles. The conveying mechanism 2 is fixedly connected to the top of the conveyor support 1 along its length. The conveying mechanism 2 includes a conveyor belt 21 for carrying and transporting the packaging bottles. To prevent the packaging bottles from scattering or falling during the transport process, guardrails 11 are fixedly connected to both ends of the conveyor support 1.

[0034] Preferably, to ensure the orderly transport of the packaging bottles, the conveying mechanism 2 further includes a bottle-separating screw 22 disposed at the front end of the conveyor belt 21. The bottle-separating screw 22 separates the packaging bottles at equal intervals, facilitating the orderly operation of the subsequent coding mechanism and visual inspection mechanism. In this embodiment, the conveyor belt 21, the bottle-separating screw 22, and their cooperating structure all adopt existing technology, so their structure will not be described in detail.

[0035] The coding mechanism is connected to the conveying bracket 1 and is located at the rear end of the bottle-separating screw 22. It includes a laser coding machine 31, which is used to code the body of the packaging bottle. The coding information includes the date, shelf life or barcode, etc. The laser coding machine 31 adopts existing technology.

[0036] The visual inspection mechanism is connected to the conveyor support 1 and is located at the rear end of the coding mechanism. It includes a visual inspection module 4 and an image processing module 5. The visual inspection module 4 is used to collect image information of the packaging bottles that are conveyed sequentially by the conveyor belt 21. The image processing module 5 is connected to the visual inspection module 4 and can receive the image information collected by the visual inspection module 4, process the image information, and perform defect analysis and identification.

[0037] For details, see Figure 3 The visual inspection module 4 includes a first mounting bracket 41, an inspection camera 42 connected to the first mounting bracket 41, a light source position adjustment plate 44 connected to the top of the inspection camera 42, and a light source 43. The light source position adjustment plate 44 is connected to the inspection camera 42 via a fixed base 46, and the light source position adjustment plate 44 and the fixed base 46 are connected by an adjustable nut. The light source 43 is fixedly connected to the light source position adjustment plate 44. The angle of the light source position adjustment plate 44 can be adjusted by adjusting the nut, thereby adjusting the angle of the light source 43 to ensure accurate beam focusing or uniform illumination and avoid detection errors caused by position deviation. The visual inspection module 4 also includes a first sensor 45 disposed at the front end of the first mounting bracket 41. The first sensor 45 is a high-precision industrial sensor, which is fixedly connected to the conveying bracket 1 and disposed at the front end of the inspection camera 42. It is used to detect whether the packaging bottle has reached a preset position and trigger the inspection camera 42 to take a picture based on the detection information. The inspection camera 42 and the light source 43 cooperate to obtain high-definition image information of the packaging bottle.

[0038] Preferably, to enable the visual inspection module 4 to adapt to packaging products of different heights, in this embodiment, the first mounting bracket 41 is constructed as a height-adjustable screw drive structure, which is driven by a handwheel 411 fixedly connected to one end of the screw. The inspection camera 42 is fixedly connected to the output end of the screw drive structure via a camera mounting bracket. More preferably, as... Figure 4 As shown, the lead screw mounting bracket 412 of the lead screw drive structure is constructed with a scale coating 413 so that the scale can be referenced for quick adjustment when switching between different products.

[0039] The image processing module 5 includes an industrial control computer connected to the bottom of the conveyor support 1. This computer has a built-in image processing system capable of denoising, enhancing, segmenting, and extracting features from the received packaging bottle image information. It further performs defect comparison analysis and saves defect photos of the processed images. Defects include, but are not limited to, bottle defects, coding defects, and liquid level defects. The image processing module 5 transmits the defect identification information to the device's control system, which then controls the rejection mechanism 6 accordingly. In this embodiment, the image processing module 5 uses existing technology methods for packaging image analysis and defect identification.

[0040] The rejection mechanism 6 is located at the rear end of the visual inspection mechanism and includes a flexible rejection component 61 fixedly connected to the conveyor support 1 and a defective product receiving platform 62 corresponding to the position of the flexible rejection component 61. The flexible rejection component 61 is used to push the determined defective packaging bottles to the defective product receiving platform 62. The defective product receiving platform 62 is connected to the conveyor support 1 and its orientation is perpendicular to the conveyor support 1. The defective product receiving platform 62 can adopt a conveyor belt 21 structure or a platform structure.

[0041] See Figure 5 The flexible rejection assembly 61 includes a rectangular mounting box 611 and several retractable flexible rods 612 connected to one end of the mounting box 611, with the flexible rods 612 facing the defective product receiving table 62. As shown in the figure, the flexible rods 612 are of different lengths and are arranged diagonally from shortest to longest along the conveyor belt 21. The longest flexible rod 612 extends to correspond to the defective product receiving table 62. Each flexible rod 612 is driven by a corresponding cylinder fixedly connected to the mounting box 611. When a good product arrives at the position of the flexible rejection assembly 61, the flexible rods 612 do not move and are in a retracted state. At this time, the good product can smoothly pass through the conveyor belt 21 to the next process. When a defective product arrives at the position of the flexible rejection assembly 61, the flexible rods 612 extend to form a guide rejection structure, smoothly pushing the defective product to the defective product receiving table 62.

[0042] Preferably, the end of the flexible rod 612 is further connected to a buffer pad 613, which is made of an elastic material, such as rubber or silicone. Figure 6 As shown, in this embodiment, the buffer pad 613 is constructed as a sloping structure at the end that contacts the product, thereby increasing the contact area with the bottle and preventing damage to the surface pattern of the packaging bottle.

[0043] It is understood that the visual-assisted rejection device for packaging defect detection provided in this embodiment also includes a control system. All of the above-mentioned actions are controlled by the control system. Specifically, the control system may include a control chip or microcontroller that can control each mechanism according to a predetermined program, so that each mechanism can start, analyze, stop or perform other actions according to a preset process.

[0044] Example 2

[0045] The visual-assisted rejection device for packaging defect detection provided in this embodiment has a substantially the same structure as that in Embodiment 1. Therefore, for the sake of brevity, only the differences will be described in detail here.

[0046] To reduce the number of packages with coding defects and prevent coding defects caused by liquid adhering to the outer wall of the packaging bottle, in this embodiment, the coding mechanism also includes a blowing module 32 disposed between the bottle-separating screw 22 and the laser coding machine 31. The blowing module 32 is used to blow away and remove the liquid adhering to the bottle body, making the coding clearer and reducing the excessive rejection burden caused by coding defects.

[0047] For details, see Figure 7 The purging module 32 includes a second sensor 321 fixedly connected to the conveying bracket 1 and a purging nozzle 322 connected to the conveying bracket 1 via the purging bracket. The second sensor 321 is located at the front end of the purging nozzle 322 and is used to detect whether the packaging bottle has entered the preset purging area and transmit the detection signal to the control system. The purging nozzle 322 is connected to a compressed air source via a purging pipeline, and the purging pipeline is connected to a compressed air control valve.

[0048] In this embodiment, the purge nozzle 322 adopts a fan-shaped structure nozzle in the prior art. Compressed air passes through the purge nozzle 322 in a fan-shaped airflow. This structure can increase the purge area of ​​the bottle and ensure that the liquid in the bottle is completely purged clean.

[0049] In practical applications, the filled bottled products are conveyed by the conveyor belt 21 of the conveyor mechanism 2 and separated at equal intervals by the bottle-separating screw 22. When the second sensor 321 detects that the bottle has entered the purging area, it sends a detection signal to the control system. The control system controls the solenoid valve of the compressed air control valve to open, and compressed air is blown onto the bottle through the fan-shaped purging nozzle 322 to clean the liquid on the bottle surface. Then, the bottle enters the laser coding area for coding. After coding, the bottle passes through the first sensor 45, which triggers a detection signal, causing the high-resolution detection camera 42 to take multi-angle pictures of the bottle and acquire bottle image information. The acquired image data is transmitted to the image processing system of the industrial control computer through a high-speed network interface. The image processing algorithm is used to extract the appearance shape and liquid level feature information of the bottle cap, and the algorithm is used to detect liquid level and bottle cap defects. Defective products are pushed to the defective product receiving table 62 by the flexible rod 612 of the rejection mechanism 6 to ensure that only qualified products enter the subsequent packaging stage.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A visually-assisted rejection device for detecting packaging defects, characterized in that, Including the conveyor support (1) and: The conveying mechanism (2) is connected to the top of the conveying support (1) along its length direction and includes a conveyor belt (21); The coding mechanism, connected to the conveyor bracket (1), includes a laser coding machine (31) for packaging coding; A visual inspection mechanism is connected to the conveying bracket (1) and set at the rear end of the coding mechanism. It includes a visual inspection module (4) and an image processing module (5). The visual inspection module (4) is used to collect image information of the packaging. The image processing module (5) is connected to the visual inspection module (4) and is used to process the received image information and perform defect analysis and identification. The rejection mechanism (6) includes a flexible rejection component (61) connected to the conveyor support (1) and a defective product receiving platform (62) corresponding to the position of the flexible rejection component (61). The flexible rejection component (61) includes a mounting box (611) constructed as a rectangular structure and a plurality of flexible rods (612) telescopically connected to one end of the mounting box (611). The flexible rods (612) are arranged in a diagonal line from short to long along the conveying direction of the conveyor belt (21). The defective product receiving platform (62) is connected to the conveyor support (1) and is positioned perpendicular to the conveyor support (1).

2. The visual-assisted rejection device for packaging defect detection according to claim 1, characterized in that, The conveying mechanism (2) also includes a bottle-separating screw (22) disposed at the front end of the conveyor belt.

3. The visual-assisted rejection device for packaging defect detection according to claim 1, characterized in that, The visual inspection module (4) includes a first mounting bracket (41), an inspection camera (42) connected to the first mounting bracket (41), and a light source (43) connected to the top of the inspection camera (42).

4. The visual-assisted rejection device for packaging defect detection according to claim 3, characterized in that, The first mounting bracket (41) is configured as a liftable and adjustable lead screw drive structure.

5. The visual-assisted rejection device for packaging defect detection according to claim 1, characterized in that, The flexible rod (612) is driven by each corresponding cylinder that is fixedly connected in the mounting box (611).

6. The visual-assisted rejection device for packaging defect detection according to claim 1, characterized in that, The end of the flexible rod (612) is also connected to a buffer pad (613) made of elastic material.

7. The visual-assisted rejection device for packaging defect detection according to claim 1, characterized in that, The coding mechanism also includes a cleaning module (32) disposed at the front end of the laser coding machine (31). The cleaning module (32) includes a second sensor (321) fixedly connected to the conveying bracket (1) and a cleaning nozzle (322) connected to the conveying bracket (1) through the cleaning bracket.

8. The visual-assisted rejection device for packaging defect detection according to claim 7, characterized in that, The purge nozzle (322) is configured as a fan-shaped structure.

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