Visual detection-based device for detecting and removing impurities in residual tobacco shreds

Abstract

The utility model discloses a visual inspection-based device for detecting and removing sundries in tobacco shreds of defective cigarettes, which comprises a vibration scattering device comprising a scattering basket and a vibrator, the feeding device comprises a conveying belt, a feeding pipe and a discharging hopper which are arranged in sequence; the sundry identification device comprises an image acquisition camera; the blanking device comprises a plurality of blanking areas and a discharge port which are regularly arranged; the sundry removing device comprises a sundry positioning camera and a negative pressure suction device. According to the utility model, image acquisition and impurity identification are carried out on the residual tobacco shreds in the falling process, impurities can be timely and accurately detected, the situation that the impurities are covered and cannot be detected is avoided, the impurities are accurately removed by the aid of the impurity removing device, and the aims of improving the purity of the residual tobacco shreds and improving the quality of the doped tobacco shreds are fulfilled.

Description

Technical Field

[0001] This utility model relates to the field of cigarette visual inspection, specifically to a device for detecting and removing impurities in residual tobacco shreds based on visual inspection. Background Technology

[0002] During the cigarette rolling and packaging process, some cigarettes are rejected due to their appearance, physical properties, or failure to meet quality control standards in their carton packaging. These rejected cigarettes can actually be disassembled and the tobacco recycled. Tobacco re-blending is an important part of the cigarette blending and flavoring process. Currently, re-blended tobacco is mostly produced by separating the cigarette paper and filter rod from the tobacco in high-quality cigarettes using a disassembly device. The disassembled tobacco is then screened using a spectral purification device to remove impurities such as cigarette paper. However, spectral purification is not very effective at removing small pieces of cigarette paper, requiring a secondary manual screening of the tobacco after spectral purification.

[0003] Utility model patent CN117000634A discloses a device for sorting and removing impurities from residual tobacco, which uses air separation to separate paper scraps from tobacco shreds in residual tobacco, thereby achieving the purpose of sorting and removing impurities. Utility model patent CN218502333U discloses a device for removing impurities from recycled tobacco shreds, which uses the principle of electrostatic adsorption to remove tiny impurities from residual tobacco shreds. Utility model patent CN221769313U discloses an impurity detection device for online tobacco shred recycling systems, which uses visual detection combined with a negative pressure device to remove impurities from tobacco shreds. Invention patent CN117770505A discloses a method and device for detecting and removing impurities in online tobacco shred recycling systems, which uses traditional image processing methods to detect impurities in recycled tobacco shreds, while simultaneously using a negative pressure device to remove the impurities.

[0004] However, traditional image processing methods for identifying debris may result in misidentification or failure to detect it, and they are not effective at detecting various types of debris. Furthermore, after the tobacco residue passes through the cleaning equipment, small pieces of larger cigarette paper and heavy filter rod fragments may still remain. In this case, using the aforementioned device to remove debris from the tobacco residue has certain limitations and may affect the quality of the remixed tobacco. Utility Model Content

[0005] To address the aforementioned shortcomings, this utility model provides a visual detection and removal device for impurities in residual tobacco, aiming to remove impurities from residual tobacco, improve the purity of residual tobacco, and enhance the quality of recycled tobacco.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0007] A vision-based detection and removal device for impurities in residual tobacco, including

[0008] A vibrating spreading device includes a spreading basket and a vibrator that provides kinetic energy to it; the spreading basket has holes on its four sides to receive residual tobacco shreds conveyed by the feeding device, and the vibration causes the residual tobacco shreds to be evenly spread onto the feeding device through the holes of the spreading basket.

[0009] The feeding device includes a conveyor belt, a feeding pipe and a discharge hopper arranged in sequence, wherein the discharge hopper is connected to a spreading basket.

[0010] The debris identification device includes an image acquisition camera, which is used to acquire images of residual tobacco shreds during the scattering process;

[0011] The feeding device includes several regularly arranged feeding zones and a lower discharge port. Each feeding zone has an openable bottom to allow the residual tobacco shreds, after removing impurities, to slide down to the discharge port.

[0012] The debris removal device includes a debris positioning camera and a negative pressure suction device. The debris positioning camera is used to acquire images when the debris removal device moves to the area where the debris is located. The negative pressure suction device uses negative pressure to suck up the debris, thereby achieving the purpose of debris removal.

[0013] As a further improvement, the conveyor belt is a transport device that transports the tobacco shreds dropped from the spectral cleaning equipment to the detection and rejection system, the feed pipe is a connecting device that connects the conveyor belt and the discharge funnel, and the discharge funnel is a device that allows the tobacco shreds to fall smoothly into the spreading basket.

[0014] As a further improvement, the image acquisition camera includes several cameras disposed above the feeding device. The cameras acquire images of the residual tobacco shreds during the falling process, and at the same time, the images from each camera are stitched together to cover all the falling areas of the feeding device.

[0015] As a further improvement, the image acquisition camera includes four cameras positioned at the four corners above the unloading device.

[0016] As a further improvement, the feeding device is used to receive the residual tobacco shreds scattered by the vibrating feeding device, including a nine-square grid-shaped feeding area. Each feeding area can be controlled by compressed air to open and close the bottom feeding plate, so that the residual tobacco shreds with impurities removed can slide down to the discharge port.

[0017] As a further improvement, if the material spreading time of the spreading basket above a certain material dropping area exceeds the set time and the debris identification device still fails to identify debris, the vibrating spreading device stops vibrating and moves to the next material dropping area by itself. At this time, the material dropping plate of the material dropping area opens to allow the residual tobacco to slide off.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention's vibratory spreading device employs a large-diameter spreading basket to spread material from the side, resulting in more uniform spreading. Simultaneously, it is equipped with a debris identification device to detect debris in the mixture of residual tobacco and shreds during the falling process. This ensures timely and accurate detection of debris, preventing it from being covered and thus undetectable. Furthermore, a debris removal device precisely removes debris, thereby improving the purity of the residual tobacco and shreds and enhancing the quality of the recycled tobacco. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a three-dimensional structural diagram of the device of this utility model;

[0022] Figure 2 This is a front view of the device structure of this utility model;

[0023] Figure 3 This is a side view of the device structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the vibratory material spreading device of this utility model;

[0025] Figure 5 This is a schematic diagram of the debris removal device of this utility model.

[0026] 1-Vibrating material spreading device; 11-Material spreading basket; 2-Feeding device; 21-Conveyor belt; 22-Feeding pipe; 23-Discharge hopper; 3-Debris identification device; 31-Image acquisition camera; 4-Discharge device; 41-Discharge area; 42-Discharge plate; 5-Debris removal device; 51-Debris positioning camera; 52-Negative pressure suction device. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. 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.

[0028] This utility model relates to a device for detecting and removing impurities in residual tobacco shreds based on visual inspection, referring to... Figures 1 to 5 It includes a vibrating spreading device 1, a feeding device 2, a debris identification device 3, a discharging device 4, and a debris removal device 5.

[0029] The vibrating spreading device 1 includes a spreading basket 11 and a vibrator that provides kinetic energy to it. It is used to receive the residual tobacco shreds conveyed by the feeding device 2 and to spread the residual tobacco shreds evenly onto the feeding device 4 through the side holes of the large-diameter spreading basket 11.

[0030] The feeding device 2 includes a conveyor belt 21, a feeding pipe 22, and a discharge hopper 23 arranged in sequence. The discharge hopper 23 is connected to the spreading basket 11. The conveyor belt 21 is a transport device that transports the tobacco shreds that fall from the spectral cleaning equipment to the detection and rejection system. The feeding pipe 22 is a connecting device that connects the conveyor belt 21 and the discharge hopper 23. The discharge hopper 23 is a device that allows the tobacco shreds to fall smoothly into the spreading basket 11.

[0031] The debris identification device 3 includes an image acquisition camera 31, which is used to acquire images of residual tobacco shreds during the scattering process. Then, the image acquisition camera 31 is used to detect debris and the partition where the debris is located in the acquired image by a known image processing detection unit, and the partition information is transmitted to the debris removal device 5.

[0032] The feeding device 4 includes multiple regularly arranged feeding zones 41 and a lower discharge port. Each feeding zone 41 has an openable bottom to allow the residual tobacco shreds, after removing impurities, to slide down to the conical discharge port.

[0033] The debris removal device 5 includes a debris positioning camera 51 and a negative pressure suction device 52. The debris positioning camera 51 is used to acquire images when the debris removal device 5 moves to the area where the debris is located. Then, with the help of a known debris image detection unit and a public image processing algorithm, the debris in the acquired image is located, and the location of the debris and the suction path are transmitted to the negative pressure suction device 52. The negative pressure suction device 52 uses negative pressure to suck up the debris, thereby achieving the purpose of debris removal. After the debris is removed, the discharge plate 42 of the area opens, allowing the residual tobacco on it to slide to the collection point below. The debris removal device 5 then moves to the next discharge area 41 where debris needs to be removed.

[0034] As a preferred embodiment, the image acquisition camera 31 includes four cameras positioned above the feeding device 4. These cameras acquire images of the falling tobacco shreds from different angles, and simultaneously stitch the images from each camera together. This stitched image covers all directions of the feeding device 4 and all falling areas 41. A known image processing and detection unit uses a publicly available image processing algorithm to detect the stitched image. When a filter rod fragment or cigarette paper fragment is detected, the feeding basket 11 stops vibrating and moves directly above the next falling area 41. The image processing and detection unit then sends the number of the falling area 41 containing the debris to the debris removal device 5.

[0035] In a preferred embodiment, the feeding device 4 is used to receive the residual tobacco shreds scattered by the vibrating feeding device 1. It includes nine feeding zones 41 arranged in a 3×3 grid. Each feeding zone 41 can be controlled by compressed air to open and close the bottom feeding plate 42, allowing the residual tobacco shreds, after removing impurities, to slide down to the discharge port. When the feeding time of the feeding basket 11 above a certain feeding zone 41 exceeds a set time, and the impurity identification device 3 still does not identify any impurities, the vibrating feeding device 1 stops vibrating and moves to the next feeding zone 41. At this time, the feeding plate 42 of the feeding zone 41 opens, allowing the residual tobacco shreds to slide down.

[0036] The working principle of this utility model is as follows:

[0037] When the device is turned on, the vibrating spreading device 1 and the debris removal device 5 move to the position directly above the first material drop area 41 in the upper left corner via a common chain drive. At this time, the residual tobacco shreds after one impurity removal fall onto the conveyor belt 21 and are transported to the feed inlet above the system. The residual tobacco shreds then slide through the feed pipe 22 into the spreading basket 11 below. The spreading basket 11 vibrates to evenly spread the residual tobacco shreds onto the feeding device 4. During this process, full-area images of the residual tobacco shreds falling are acquired by cameras at different positions. The images from each camera are stitched together, and the resulting images are divided into nine partitions, a to i, in order from left to right and from top to bottom. The images are then used to identify debris and tobacco shreds. When debris is detected in a certain material drop area 41, the spreading basket 11 stops vibrating and moves to the lower position. Above the material drop zone 41, the zone number of the material drop zone 41 is obtained. The detection result is simultaneously fed back to control the debris removal device 5 to remove debris from the area. If the material spreading device 1 fails to detect debris after the spreading time exceeds the set time, it will automatically move to the next material drop zone 41. When the debris removal device 5 reaches the feedback zone, it will collect images of the area through the debris positioning camera 51 and detect and locate the debris in the collected images. The removal path of multiple debris will be optimized according to the method of first the horizontal axis and then the vertical axis. According to the removal path, the negative pressure suction device 52 moves to the location of the debris and sucks it up to remove it. After the removal is completed, the material drop plate 42 below the material drop zone 41 will automatically open to allow the residual tobacco to slide down. After the residual tobacco has slid down, the material drop plate 42 will automatically close. The above process is repeated until all the residual tobacco is processed.

[0038] It should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A visual inspection-based device for detecting and removing impurities in residual tobacco, characterized in that: include A vibrating spreading device includes a spreading basket and a vibrator. The spreading basket has holes on its four sides to spread residual tobacco evenly onto the feeding device through vibration. The feeding device includes a conveyor belt, a feeding pipe and a discharge hopper arranged in sequence, wherein the discharge hopper is connected to a spreading basket. The debris identification device includes an image acquisition camera, which is used to acquire images of residual tobacco shreds during the scattering process; The feeding device includes several regularly arranged feeding zones and discharge ports. Each feeding zone has an openable bottom to allow the residual tobacco shreds, after removing impurities, to slide down to the discharge port. The debris removal device includes a debris positioning camera and a negative pressure suction device. The debris positioning camera is used to acquire images when the debris removal device moves to the area where the debris is located. The negative pressure suction device uses negative pressure to suck up the debris, thereby achieving the purpose of debris removal.

2. The detection and rejection device according to claim 1, characterized in that: The image acquisition camera includes several cameras mounted above the unloading device.

3. The detection and rejection device according to claim 2, characterized in that: The image acquisition camera includes four cameras positioned at the four corners above the unloading device.

4. The detection and rejection device according to claim 1, characterized in that: The feeding device includes a nine-grid-shaped feeding area. Each feeding area can be opened and closed by compressed air to control the bottom feeding plate, so that the residual tobacco shreds after removing impurities slide down to the discharge port.

5. The detection and rejection device according to claim 4, characterized in that: After the device is turned on, the vibrating spreading device and the debris removal device move to the position directly above the first material dropping area in the upper left corner. At this time, the residual tobacco shreds after one impurity removal fall onto the conveyor belt and are transported to the upper feed inlet by the conveyor belt, so that the residual tobacco shreds slide down through the feed pipe into the spreading basket below.

Images