Cigarette Pack Appearance Detection System

Abstract

The present invention relates to the technical field of cigarette production equipment, and specifically discloses a cigarette packet appearance detection system, including a detection system. The detection system includes a cigarette packet position and attitude abnormality detection system, a data acquisition system, and an alarm system; the attitude abnormality detection system is arranged upstream of the data acquisition system; the cigarette packet position and attitude abnormality detection system includes a transmissive photoelectric sensor, and the transmissive photoelectric sensor is arranged on both sides of the cigarette packet appearance detection feeding track and at a position higher than the height of the cigarette packets on the cigarette packet appearance detection feeding track; the data acquisition system includes an industrial camera, and the industrial camera is used for image acquisition of the cigarette packets; the alarm system includes an image display device and a defect warning light, which are used for receiving the alarm signal sent from the signal processing end and giving a warning through the defect warning light. The adoption of the present invention has the advantages of rich detection functions, good conveying effect, and significantly improving production efficiency, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette production equipment, and particularly to a cigarette pack appearance detection system. Background Art

[0002] In order to continuously optimize lean production and promote the construction of an efficient digital factory, it is necessary to provide consumers with more perfect cigarette products. The quality of the cigarette pack appearance is the primary value manifestation of cigarette products and is related to the corporate product image. The cigarette pack is light in weight and has a cuboid structure with multiple edges and corners. When using a conventional cigarette pack conveying system, especially at corners (right-angle turns), it is most likely to cause damage and jamming of the cigarette pack. Moreover, especially when it is conveyed to the appearance detection feeding track, the above impacts are more obvious. This is mainly because in order to ensure that the cigarette pack is in a proper position during the conveying process to improve the accuracy of the industrial camera's judgment of the cigarette pack appearance, the appearance detection feeding track will be made as small as possible. Because the closer the cross-sectional size of the track is to the cross-sectional size of the cigarette pack, the more it can ensure that the cigarette pack cannot swing and tilt during the conveying process. However, the closer the cross-sectional size of the track is to the cross-sectional size of the cigarette pack, the more likely it is to occur that the cigarette pack is jammed and damaged during actual transmission. This is a long-existing contradictory problem. Once a cigarette pack is jammed in the entire feeding track, it is necessary to stop the machine for cleaning, which greatly reduces the production efficiency. And how to effectively reduce the damage of the cigarette pack and improve the detection and rejection efficiency of the cigarette pack appearance and improve the production efficiency is a difficult problem that the industry has been trying to solve. Summary of the Invention

[0003] In view of the above deficiencies, the present invention provides a cigarette pack appearance detection system to improve the production efficiency of cigarette pack appearance detection.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The cigarette pack appearance detection system includes a cigarette pack appearance detection feeding track and also includes a detection system. The detection system includes a cigarette pack position and attitude abnormality detection system, a data acquisition system, and an alarm system; the attitude abnormality detection system is arranged upstream of the data acquisition system;

[0006] The cigarette pack position and attitude abnormality detection system includes a transmissive photoelectric sensor, and the transmissive photoelectric sensor is arranged on both sides of the cigarette pack appearance detection feeding track and at a position higher than the height of the cigarette pack on the cigarette pack appearance detection feeding track;

[0007] The data acquisition system includes an industrial camera, and the industrial camera is used for image acquisition of the cigarette pack and transmits the data to a signal processing end for arithmetic analysis;

[0008] The alarm system includes an image display device, an information processing system, and a defect warning light, which are used to receive the alarm signal sent from the signal processing end and give a warning through the defect warning light.

[0009] Preferably, it further includes a light perception system, which includes a light perception system component and a photoelectric proximity switch; the photoelectric proximity switch is arranged on both sides of the feeding track for detecting the appearance of the cigarette packet, and the set position is not higher than the height of the cigarette packet; the photoelectric proximity switch is used to detect whether the cigarette packet reaches the photographing position, and then provides a signal for the controller, and the controller controls the light intensity of the light perception system component.

[0010] Preferably, it further includes a first cigarette packet conveying channel, a second cigarette packet conveying channel, and a third cigarette packet conveying channel; the first cigarette packet conveying channel feeds the cigarette packet into the small box transparent paper folding and packaging wheel; the second cigarette packet conveying channel is arranged between the small box transparent paper folding and packaging wheel and the cigarette packet lifting channel; the third cigarette packet conveying channel is arranged below the cigarette packet lifting channel.

[0011] Preferably, it further includes a dual-model fusion appearance detection method, and the dual-model fusion appearance detection method includes: (1) Unsupervised detection model training method: The unsupervised detection model divides the appearance image of the photographed cigarette packet into a total of eight regions of 2×4, and through collecting the positive samples of these eight regions, the model is trained without supervision; through the unsupervised training method, the model will segment these eight detection regions and output a detection value, and determine whether the detection region is normal through the size of this detection value;

[0012] (2) Supervised detection model training method: The supervised detection model marks the defect points of the existing defect samples, and the marked content includes the position information, height and width, category, and pixel information within the marked region of the defect points. Through the above information, the detection model is supervised and learned, so that the detection model can track and detect the defect points similar to the training samples.

[0013] Preferably, it further includes a detection method, and the detection method includes:

[0014] Step 1: Start the system. When the cigarette packet reaches the position of the opposed photoelectric sensor, the opposed photoelectric sensor identifies and judges the posture of the cigarette packet, and the posture includes the wrinkled and bulged posture of the cigarette packet, the non-flat posture, the non-standard state, and other abnormal postures;

[0015] Step 2: When the defect signal source received by the system is from the opposed photoelectric sensor, it is determined that the cigarette pack defect information is the situation of the cigarette pack being wrinkled and bulging, or not lying flat, or not in a standard state, and other abnormal postures; the cigarette pack packaging equipment will immediately stop, and after the operator troubleshoots and removes the cigarette packs with quality defects, then reset and start the machine;

[0016] Step 3: When the cigarette pack reaches the photographing position, relevant detections are carried out by the industrial camera. When the defect signal source received by the system is from the industrial camera, it is determined that the cigarette pack defect information is the trademark paper being wrinkled, using the wrong trademark paper material, the trademark paper being poorly pasted, the trademark paper being scratched, and other unqualified situations; at this time, the alarm system is started, the defect warning light flashes, the image display device displays the defect image and marks the cigarette pack defect area; the information processing system records and saves the defect image, and the dual-model fusion appearance detection method is applied to the defect image, and the image is divided into a total of eight regions of 2×4;

[0017] The eight regions are detected by the unsupervised detection model training method, and it is determined whether the detection region is normal according to the size of the region detection value;

[0018] The existing defect samples are marked with defect point positions by the supervised detection model training method. The marked content includes the position information, height, width, category, and pixel information within the marked region of the defect points. Through the above information, the detection model is supervised to learn, so that the detection model can track and detect the defect points similar to the training samples in the image display device;

[0019] Step 4: Determine whether the number of cigarette packs with defects exceeds 5; if it exceeds, the packaging equipment will immediately stop, and after the operator troubleshoots and removes the cigarette packs with quality defects, then reset and start the machine; if it does not exceed, the subsequent steps will be carried out without stopping;

[0020] Step 5: For the defective cigarette packs, they enter the small box transparent paper folding and packaging wheel from the first cigarette pack conveying channel, and the small box transparent paper conveying device stops conveying the transparent paper;

[0021] Step 6: The defective cigarette packs enter the second cigarette pack conveying channel and reach the cigarette pack lifting channel;

[0022] Step 7: The cigarette pack lifting channel stops lifting upward;

[0023] Step 8: Under the action of the subsequent forward pushing of the cigarette packs, the defective cigarette packs fall into the third cigarette pack conveying channel, and the third cigarette pack conveying channel removes the defective cigarette packs into the cigarette pack removal bucket.

[0024] Preferably, the feeding track for cigarette pack appearance detection is a low-loss feeding track for cigarette pack appearance detection; the low-loss feeding track for cigarette pack appearance detection includes an inclined conveying track, a horizontal negative-pressure pushing track, and a photographing feeding track; the bottom plate of the inclined conveying track is an inclined surface; the horizontal negative-pressure pushing track is connected to the lowest end of the inclined conveying track; a cigarette pack outlet is arranged on the front side of the horizontal negative-pressure pushing track, and the cigarette pack outlet is arranged at the left end of the horizontal negative-pressure pushing track; the photographing feeding track is connected to the horizontal negative-pressure pushing track at a 90-degree angle, and the inner wall of the left side plate of the photographing feeding track is flush with the inner wall of the left side plate of the horizontal negative-pressure pushing track.

[0025] Preferably, a light curtain sensor is arranged at the left end of the horizontal negative-pressure pushing track; the light curtain sensor is arranged on the upper and lower plates of the horizontal negative-pressure pushing track.

[0026] Preferably, second light curtain sensors are arranged on the left and right side plates of the photographing feeding track, and the distance between the second light curtain sensors and the cigarette pack outlet is greater than the width between the front and rear ends of a cigarette pack. Preferably, the bottom plates of the inclined conveying track and the horizontal negative-pressure pushing track are support panels; the bottom of the photographing feeding track is a horizontal conveyor belt; a transition horizontal panel is further arranged between the photographing feeding track and the horizontal negative-pressure pushing track; a plurality of air extraction holes are arranged on the bottom plate of the horizontal negative-pressure pushing track; a negative-pressure chamber is arranged corresponding to the air extraction holes on the lower side of the bottom plate of the horizontal negative-pressure pushing track; an electronically controlled air valve is arranged on the air extraction duct of the negative-pressure chamber.

[0027] Preferably, a cigarette pack pushing device is further arranged at the rear side of the horizontal negative-pressure pushing track, and the cigarette pack pushing device is arranged corresponding to the cigarette pack outlet; the cigarette pack pushing device is a mechanical telescopic push rod device or a high-pressure air hole blowing device.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. The detection function of the present invention is rich, and it can identify cigarette pack appearance quality defects including cigarette pack pose state, trademark paper wrinkles, incorrect use of trademark paper materials, poor pasting of trademark paper, etc., and has a certain ability to detect known or foreseeable defect points through the dual-model fusion appearance detection method; it not only guarantees the quality of cigarette packs, but also can automatically reject defective cigarette packs, saves production materials, reduces the time and effort of manual labor, and improves production efficiency.

[0030] 2. The low-loss feeding track for detecting the appearance of cigarette packs in the present invention is provided with an inclined conveying track. The cigarette packs slide down and push each other along the slope of the inclined conveying track into the horizontal negative-pressure pushing track. The first cigarette pack in the horizontal negative-pressure pushing track starts from the left end. The leftward pressure on the first cigarette pack completely comes from the pressure of all the cigarette packs on its right side, and the pressure is constant and controllable (the pressure size is controlled by adjusting the slope and length of the inclined conveying track). Before pushing the first cigarette pack towards the cigarette pack outlet, the negative-pressure chamber is activated to apply negative-pressure adsorption to all the cigarette packs on the horizontal negative-pressure pushing track. At this time, the negative pressure helps to prevent the first cigarette pack from swinging during the process of being pushed towards the cigarette pack outlet and ensures the stability of the pushing process of the first cigarette pack. The second cigarette packs distributed on the right side of the first cigarette pack are negatively-pressure adsorbed, reducing the interference of the leftward acting force formed on the first cigarette pack during the process of the first cigarette pack being pushed towards the cigarette pack outlet, and affecting the standard pressing of the first cigarette pack into the photographing feeding track. By arranging the inner wall of the left side plate of the photographing feeding track to be flush with the inner wall of the left side plate of the horizontal negative-pressure pushing track, it is possible to make the cross-sectional size of the photographing feeding track closest to the cross-sectional size of the cigarette pack when processing the photographing feeding track. Through the above technical solutions, it is beneficial to reduce the phenomenon of cigarette pack damage during the turning and conveying process of the cigarette packs, and can significantly improve the posture of the cigarette packs during the conveying process in the photographing feeding track, and there will be no situation where the industrial camera detects errors due to the posture problems of the cigarette packs.

[0031] 3. By providing the second pair of light-emitting and light-receiving grating sensors in the present invention, when using the photographing feeding track to convey cigarette packs, it can achieve interval conveying of cigarette packs with a controllable standard interval, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments.

[0033] Figure 1 It is a schematic structural diagram of the cigarette pack appearance detection system of the present invention;

[0034] Figure 2 It is Figure 1 a schematic side view structure diagram;

[0035] Figure 3 It is Figure 1 a schematic side-sectional view structure diagram of the double-channel cigarette pack appearance detection device in the middle;

[0036] Figure 4 It is Figure 1 a schematic structure diagram of the double-channel cigarette pack appearance detection device in the middle;

[0037] Figure 5 It is Figure 3 a schematic structure diagram of the data acquisition component in the middle;

[0038] Figure 6For Figure 3 The main structural schematic diagram of the light sensing system components in

[0039] Figure 7 For Figure 5 The structural schematic diagram of the adjusting hand in

[0040] Figure 8 For Figure 5 The structural schematic diagram of the adjusting joint in

[0041] Figure 9 The control flow chart of a dual - model - fusion - based dual - channel cigarette packet appearance detection system provided by an embodiment of the present invention;

[0042] Figure 10 The structural schematic diagram of the division of the cigarette packet detection area;

[0043] Figure 11 The rear - side cross - sectional view of the low - loss feeding track for cigarette packet appearance detection of the present invention;

[0044] Figure 12 Is Figure 11 The cross - sectional view when transporting cigarette packets;

[0045] Figure 13 The right - side cross - sectional view of the low - loss feeding track for cigarette packet appearance detection of the present invention;

[0046] Figure 14 Is Figure 13 The cross - sectional view when pushing a cigarette packet to the cigarette packet outlet in

[0047] Figure 15 The front view of the photographing and feeding track of the present invention. Specific embodiments

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0050] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] As Figures 1 to 10 shown, the cigarette pack appearance detection system includes a cigarette pack appearance detection feeding track. In this embodiment, the cigarette pack appearance detection feeding track can adopt a conventional feeding track. Then, a dual-channel cigarette pack appearance detection system is cited for illustration. Using a dual-channel cigarette pack appearance detection system can significantly improve production efficiency; it also includes a detection system, and the detection system includes a cigarette pack position and attitude abnormality detection system, a data acquisition system, and an alarm system; the attitude abnormality detection system is arranged upstream of the data acquisition system; the attitude abnormality detection system is used to detect the attitude of the cigarette pack at the front end, that is, to monitor whether the attitude of the cigarette pack meets the standard before the cigarette pack is fed into the data acquisition system. This is the first detection operation for the cigarette pack, which is beneficial to preventing cigarette packs with unqualified attitudes from continuously being fed into the data acquisition system, causing further scratches and damages to the cigarette packs during the conveying process and also affecting the detection and analysis of subsequent industrial cameras, and reducing the failure rate.

[0052] Preferably, it also includes a first cigarette pack conveying channel 2, a second cigarette pack conveying channel 4, and a third cigarette pack conveying channel 6; the first cigarette pack conveying channel 2 feeds the cigarette pack into the small box transparent paper folding and encapsulating wheel 3; the second cigarette pack conveying channel 4 is arranged between the small box transparent paper folding and encapsulating wheel 3 and the cigarette pack lifting channel 7; the third cigarette pack conveying channel 6 is arranged below the cigarette pack lifting channel 7. At the same time, a fourth conveying channel 5 is also provided for continuously conveying the qualified cigarette packs downward.

[0053] As Figure 3As shown in the figure, the cigarette pack position and attitude abnormal detection system includes an opposed photoelectric sensor 161. The opposed photoelectric sensor 161 is arranged on both sides of the feeding track for cigarette pack appearance detection, and the set position is higher than the height of the cigarette packs on the feeding track for cigarette pack appearance detection. For example, if a cigarette pack is higher than the standard attitude, it will be detected by the opposed photoelectric sensor 161, and this fault can be discovered in time. When the power is turned on, the opposed photoelectric sensor 161 starts to work. During the transportation of cigarette packs, when a cigarette pack 8 appears in the first cigarette pack transportation channel 2 in a non-flat attitude or non-standard state, it will block the light emitted by the transmitting end of the opposed photoelectric sensor 161, and the receiving end cannot receive the optical signal. At this time, the signal generated by the receiving end will be transmitted to the signal processing end as an abnormal occurrence signal for the program's judgment signal. Since the position and attitude state of the cigarette pack at this time will cause the packaging equipment to jam, when this signal is detected, the equipment immediately stops running, and the operator removes the cigarette pack. The data acquisition system includes the data acquisition component 130, which includes an industrial camera. The industrial camera is used to collect images of the cigarette packs and transmit the data to the signal processing end for arithmetic analysis. In this embodiment, because a dual-channel setting is adopted, two industrial cameras 131 are arranged on each channel. The industrial cameras are used to collect the appearance image data of three sides of the double cigarette packs in the dual channels. The specific implementation method is as follows: The industrial camera 131 is installed inside the detection device 1, and then the imaging position of the industrial camera 131 for the cigarette pack can be appropriately adjusted by setting an adjusting handle 151 and an adjusting joint 152. When the power is turned on, the system starts to work. When the cigarette packs in one channel reach the designated position, the industrial cameras 131 before and after the cigarette packs take pictures with the assistance of the sensing light system component 140. Each industrial camera 131 will record the length and width surfaces of the cigarette pack and the corresponding side width and height surface image conditions. Since the working principles of the two channels are the same, finally, the appearance image collection effect of six sides of the two cigarette packs is achieved, and the data is transmitted to the signal processing end for further arithmetic operations. The detection device 1 is also provided with a hardware storage area 121 and wiring holes 122 to facilitate the wiring of relevant lines.

[0054] The alarm system, such as Figure 4 As described, the main components of the alarm system are composed of an image display device 111, an information processing system, and a defect warning light 112. The specific implementation method is as follows: The image display device 111 is arranged outside the dual-channel cigarette pack appearance detection device 1 and can adjust the operating parameters of the dual-channel cigarette pack appearance detection device 1, including the pixels of the industrial camera 131, adjusting the brightness of the sensing light system component 140, etc. When the industrial camera 131 captures an image of a defective cigarette pack, the image display device 111 will display the detection image of the cigarette pack with defective quality, and the warning light will flash to play a warning role.

[0055] Preferably, it further includes a light perception system, which includes a light perception system component 140 and a photoelectric proximity switch; it is used to improve the image quality collected by the industrial camera 131. The photoelectric proximity switch is arranged on both sides of the feeding track for detecting the appearance of cigarette packs, and the set position is not higher than the height of the cigarette packs; the photoelectric proximity switch is used to detect whether the cigarette pack reaches the photographing position, and then provides a signal to the controller, and the controller controls the light intensity of the light perception system component.

[0056] As Figure 3 shown, the specific implementation method is as follows: The light perception system component 140 is installed inside the detection device, and the position of the light can be adjusted by adjusting the light perception system component 140. The photoelectric proximity switch is installed on the side of the cigarette pack conveying channel and is connected to the light source controller, and is used to detect whether the cigarette pack 8 reaches the photographing position. When the power is turned on, the light perception system starts to work. During the conveying process of the cigarette pack 8, when the cigarette pack 8 reaches the installation position of the photoelectric proximity switch, the proximity switch transmits a signal to the light source controller 140, and this signal makes the light source controller 140 briefly increase the output power of the lighting lamp, enhancing the lighting when the industrial camera 131 takes pictures. With the assistance of the light perception system, the exposure time of the industrial camera 131 is reduced, and a smaller halo is used to obtain a better depth of field, thereby improving the quality of the collected images;

[0057] Preferably, it further includes a dual-model fusion appearance detection method. As Figure 10 shown, the dual-model fusion appearance detection method includes:

[0058] (1) Unsupervised detection model training method: The unsupervised detection model divides the appearance image of the photographed cigarette pack into a total of eight regions of 2×4. By collecting the positive samples of these eight regions, the model is trained unsupervised; through the unsupervised training method, the model will segment these eight detection regions and output a detection value, and determine whether the detection region is normal according to the size of the detection value;

[0059] (2) Supervised detection model training method: The supervised detection model marks the defect points of the existing defect samples, and the marked content includes the position information, height and width, category, and pixel information within the marked area of the defect points. Through the above information, the detection model is supervised and learned, so that the detection model can track and detect defect points similar to the training samples.

[0060] Preferably, it further includes a detection method, and the detection method includes:

[0061] Step 1: Start the system. When the cigarette pack reaches the position of the opposed photoelectric sensor 161, the opposed photoelectric sensor 161 identifies and judges the posture of the cigarette pack. The postures include the wrinkled and bulged cigarette pack, non-flat postures, non-standard states, and other abnormal postures.

[0062] Step 2: When the defect signal source received by the system comes from the opposed photoelectric sensor 161, it is determined that the cigarette pack defect information is the case of the wrinkled and bulged cigarette pack, non-flat postures, non-standard states, and other abnormal postures. The cigarette pack packaging equipment immediately stops, and after the operator troubleshoots and removes the cigarette packs with quality defects, it is reset and powered on again.

[0063] Step 3: When the cigarette pack reaches the photographing position, relevant detections are carried out by the industrial camera 131. When the defect signal source received by the system comes from the industrial camera 131, it is determined that the cigarette pack defect information is the cases of the trademark paper being wrinkled, using the wrong trademark paper material, poor pasting of the trademark paper, scratched trademark paper, and other unqualified situations. At this time, the alarm system is started, the defect warning light flashes, the image display device displays the defect image and marks the cigarette pack defect area. The information processing system records and saves the defect image, and the dual-model fusion appearance detection method is applied to the defect image, and the image is divided into a total of eight regions of 2×4.

[0064] The eight regions are detected by the unsupervised detection model training method, and it is determined whether the detection region is normal according to the size of the region detection value.

[0065] The existing defect samples are marked with defect point positions by the supervised detection model training method. The marked contents include the position information, height, width, category, and pixel information within the marked region of the defect points. Through the above information, supervised learning is performed on the detection model, so that the detection model can track and detect the defect points similar to the training samples in the image display device.

[0066] Step 4: Judge whether the number of cigarette packs with defects exceeds 5 packs. If it exceeds, the packaging equipment immediately stops, and after the operator troubleshoots and removes the cigarette packs with quality defects, it is reset and powered on again. If it does not exceed, the subsequent steps are carried out without stopping.

[0067] Step 5: For the defective cigarette packs, they enter the small box transparent paper folding and packaging wheel from the first cigarette pack conveying channel, and the small box transparent paper conveying device stops conveying the transparent paper.

[0068] Step 6: The defective cigarette packs enter the second cigarette pack conveying channel and reach the cigarette pack lifting channel 7.

[0069] Step 7: The cigarette pack lifting channel 7 stops lifting upward.

[0070] Step 8: Under the action of the subsequent forward pushing of the cigarette packs, the defective cigarette packs fall into the third cigarette pack conveying channel 6, and the third cigarette pack conveying channel 6 removes the defective cigarette packs into the cigarette pack removal bucket.

[0071] For the cigarette pack appearance detection feeding track, the present invention provides another design, aiming to reduce the greater damage to cigarette packs and the easy occurrence of stuck packs in the traditional feeding track and solve the problem that the existing appearance detection feeding track cannot achieve a cross-sectional size very close to the cross-sectional size of the cigarette pack, so as to significantly improve the standard posture of the cigarette pack before taking pictures and reduce the error rate of the industrial camera information capture.

[0072] As Figures 11 to 15 shown, the present invention provides a low-loss feeding track for cigarette pack appearance detection; the low-loss feeding track for cigarette pack appearance detection includes an inclined conveying channel 9, a horizontal negative pressure pushing channel 10 and a photographing feeding track 29; the bottom plate of the inclined conveying channel 9 is an inclined surface, and its angle is adjusted according to actual needs. The magnitude of the leftward pressure received by the first cigarette pack 25 is achieved by controlling the inclination and length of the inclined conveying channel 9. The optimal design is that it can promote the first cigarette pack 25 to be pushed to the left side plate 13 of the horizontal negative pressure pushing channel and the leftward pressure of the second cigarette pack 26 on the first cigarette pack 25 is as small as possible; the horizontal negative pressure pushing channel 10 is connected to the lowest end of the inclined conveying channel 9; a cigarette pack outlet 11 is provided on the front side of the horizontal negative pressure pushing channel 10, and the cigarette pack outlet 11 is provided at the left end of the horizontal negative pressure pushing channel 10; the photographing feeding track 29 is connected to the horizontal negative pressure pushing channel 10 at a 90-degree angle, and the inner wall 13 of the left side plate of the photographing feeding track is flush with the inner wall 19 of the left side plate of the horizontal negative pressure pushing channel. In this embodiment, in order to reduce the swing of the cigarette pack before being conveyed to the industrial camera, the cross-section of the photographing feeding track 29 adopts as Figure 15 shown, that is, limit strips 30 are further provided on the left and right sides of the conveying channel to prevent the cigarette pack from swinging due to transmission vibration. Preferably, a pair of light grating sensors, that is, a transmitting module 12 and a receiving module 14, are provided at the left end of the horizontal negative pressure pushing channel 10; the pair of light grating sensors are arranged on the upper and lower two plate surfaces of the horizontal negative pressure pushing channel 10, that is, upper and lower pair of light, for monitoring whether the cigarette pack fits to the left side plate 13.

[0073] Preferably, second pair of light grating sensors 20 are provided on the left and right side plates of the photographing feeding track 29, and the distance between the second pair of light grating sensors 20 and the cigarette pack outlet is greater than the width between the front and rear ends of a cigarette pack. The purpose of such a design is to realize the interval control and conveying between the front and rear cigarette packs, which is beneficial to preventing interference with the process of the industrial camera capturing information.

[0074] Preferably, the bottom plates of the inclined conveying channel 9 and the horizontal negative pressure pushing channel 10 are support panels, that is, a metal hard plate can be selected. The purpose of this setting is as follows: to prevent the influence of vibration, fluctuation, and jitter caused by the use of a conveyor belt, and at the same time prevent the uncontrollability of relevant forces during the conveying of cigarette packs by the conveyor belt. The principle of using a conveyor belt to convey cigarette packs is that it relies on the friction between the conveyor belt and the cigarette pack for transmission. Especially during turning conveyance, for example, when two mutually perpendicular conveyor belts are used for conveyance, the cigarette pack will be subjected to a longitudinal force brought by the first conveyor belt and a lateral force brought by the second conveyor belt during the turning and pushing process. As a result, there will be too many acting forces on the cigarette pack during the pushing process, leading to the inability to accurately push the cigarette pack onto another conveyor belt, and appearance damage such as cigarette pack wear will occur. However, in this solution, the acting force during the turning and pushing process of the first cigarette pack 25 is constant and controllable. Because it is easier to control the accurate pushing process of the cigarette pack and ensure the controllability of the accuracy, the wear of the appearance of the cigarette pack during the pushing process is greatly reduced. The bottom of the photographing and feeding track 29 is a horizontal conveyor belt 24; a transition horizontal panel 23 is also provided between the horizontal conveyor belt 24 and the horizontal negative pressure pushing channel 10. The advantage of this setting is that it promotes a horizontal transition area when turning and pushing the cigarette pack, reduces the interference of uncertain acting forces during the turning and pushing process of the cigarette pack, and improves the pushing accuracy of the cigarette pack.

[0075] Preferably, a number of air extraction holes 16 are provided on the bottom plate of the horizontal negative pressure pushing channel 10; a negative pressure chamber 15 is provided corresponding to the air extraction holes 16 on the lower side of the bottom plate of the horizontal negative pressure pushing channel; an electric control air valve 18 is provided on the air extraction duct 17 of the negative pressure chamber 15. In some embodiments, the number of air extraction holes 16 provided corresponding to the first cigarette pack 25 can be less, and the number of air extraction holes provided at the second cigarette pack 26 can be more; preferably, a cigarette pack pushing device is further provided at the rear side of the horizontal negative pressure pushing channel, and the cigarette pack pushing device corresponds to the cigarette pack outlet; the cigarette pack pushing device is a mechanical telescopic push rod device or a high-pressure air hole blowing device. The mechanical telescopic push rod device 21 includes a telescopic push rod 21. During use, the telescopic push rod 21 extends out from the telescopic hole 28. For the telescopic push rod 21, multiple telescopic push rods 21 can be assembled on a push plate 22, and then the push plate 22 is driven to perform telescopic movement by power (such as an eccentric wheel, an electromagnetic telescopic rod, a telescopic cylinder, etc.).

[0076] When in use, the principle is as follows: the first cigarette pack 25 is pushed (constant force) by the second cigarette pack 26 and the third cigarette pack 27, and is close to the left side plate 13, and then is detected by the opposing grating sensor. At this time, the electric control air valve 18 is opened to provide negative pressure. At this time, the first cigarette pack 25 and the second cigarette pack 26 are both subjected to downward adsorption force. The downward force on the first cigarette pack 25 is conducive to ensuring that the posture is correct and preventing swinging in the subsequent pushing process. The downward force on the second cigarette pack 26 (i.e., it is fixed) can reduce the interference with the subsequent pushing process of the first cigarette pack 25. Then the telescopic push rod 21 is extended to push the first cigarette pack 25 forward. The first cigarette pack 25 first enters the transition horizontal panel 23. The function of the transition horizontal panel 23 is mainly to reduce the interference of the force of the front conveyor belt and to ensure that the cigarette pack is fixed in position through the cigarette pack outlet 11. The cigarette pack is then transported by the horizontal conveyor belt 24. When the cigarette pack reaches the second opposing grating sensor 20, the control system obtains a signal to control the retractable push rod 21 to be retracted, and then the electric control air valve 18 is closed. At this time, the negative pressure is removed, and then the second cigarette pack 26 is translated to the left to the left side plate 13 under the force of the third cigarette pack 27. The above operation is repeated to achieve high-precision lossless pushing of cigarette packs with good use effect.

Claims

1. A cigarette pack appearance detection system, including a feeding track for cigarette pack appearance detection, characterized in that: It further includes a detection system, which includes a cigarette pack position and attitude anomaly detection system, a data acquisition system, and an alarm system; the attitude anomaly detection system is arranged upstream of the data acquisition system; The cigarette pack position and attitude anomaly detection system includes opposed photoelectric sensors, which are arranged on both sides of the feeding track for cigarette pack appearance detection and at a position higher than the height of the cigarette packs on the feeding track for cigarette pack appearance detection; The data acquisition system includes an industrial camera, which is used to collect images of the cigarette packs and transmit the data to a signal processing terminal for arithmetic analysis; The alarm system includes an image display device, an information processing system, and a defect warning light, which are used to receive the alarm signal sent from the signal processing terminal and give a warning through the defect warning light; It further includes a light perception system, which includes a light perception system component and a photoelectric proximity switch; the photoelectric proximity switch is arranged on both sides of the feeding track for cigarette pack appearance detection and at a position not higher than the height of the cigarette packs; The photoelectric proximity switch is used to detect whether the cigarette pack reaches the photographing position, and then provide a signal to the controller, and the controller controls the light intensity of the light perception system component; The feeding track for cigarette pack appearance detection is a low-loss feeding track for cigarette pack appearance detection; the low-loss feeding track for cigarette pack appearance detection includes an inclined conveying channel, a horizontal negative pressure pushing channel, and a photographing feeding track; the bottom plate of the inclined conveying channel is an inclined surface; the horizontal negative pressure pushing channel is connected to the lowest end of the inclined conveying channel; a cigarette pack outlet is arranged on the front side of the horizontal negative pressure pushing channel, and the cigarette pack outlet is arranged at the left end of the horizontal negative pressure pushing channel; the photographing feeding track is connected to the horizontal negative pressure pushing channel at a 90-degree angle, and the inner wall of the left side plate of the photographing feeding track is flush with the inner wall of the left side plate of the horizontal negative pressure pushing channel.

2. The cigarette pack appearance detection system according to claim 1, characterized in that: It further includes a first cigarette pack conveying channel, a second cigarette pack conveying channel, and a third cigarette pack conveying channel; the first cigarette pack conveying channel feeds the cigarette packs into the small box transparent paper folding and packaging wheel; the second cigarette pack conveying channel is arranged between the small box transparent paper folding and packaging wheel and the cigarette pack lifting channel; the third cigarette pack conveying channel is arranged below the cigarette pack lifting channel.

3. The cigarette pack appearance detection system according to claim 1, characterized in that: It further includes a dual-model fusion appearance detection method, and the dual-model fusion appearance detection method includes: (1) Unsupervised detection model training method: The unsupervised detection model divides the appearance image of the photographed cigarette pack into a total of eight regions of 2×4, and conducts unsupervised training on the model by collecting positive samples of these eight regions; through the unsupervised training method, the model will segment these eight detection regions and output a detection value, and determine whether the detection region is normal according to the size of the detection value; (2) Supervised detection model training method: The supervised detection model marks the defect points on existing defect samples. The marked content includes the position information, height, width, category of the defect points, and pixel information within the marked area. Through the above information, supervised learning is carried out on the detection model, enabling the detection model to track and detect defect points similar to the training samples.

4. The cigarette pack appearance detection system according to claim 3, characterized in that: It also includes a detection method, which includes: Step 1: Start the system. When the cigarette pack reaches the position of the opposed photoelectric sensor, the opposed photoelectric sensor identifies and judges the posture of the cigarette pack. The posture includes the crumpled bulge of the cigarette pack, non-flat posture, non-standard state, and other abnormal postures. Step 2: When the defect signal source received by the system comes from the opposed photoelectric sensor, it is determined that the cigarette pack defect information is the case of the crumpled bulge of the cigarette pack, non-flat posture, non-standard state, or other abnormal postures. The cigarette pack packaging equipment immediately stops, and after the operator troubleshoots and removes the cigarette packs with quality defects, it is reset and powered on again. Step 3: When the cigarette pack reaches the photographing position, relevant detections are carried out by the industrial camera. When the defect signal source received by the system comes from the industrial camera, it is determined that the cigarette pack defect information is the case of the trademark paper being wrinkled, using the wrong trademark paper material, the trademark paper being poorly pasted, the trademark paper being scratched, and other unqualified situations. At this time, the alarm system is started, the defect warning light flashes, the image display device displays the defect image and marks the defect area of the cigarette pack. The information processing system records and saves the defect image, and applies the dual-model fusion appearance detection method to the defect image. Step 4: Judge whether the number of defective cigarette packs exceeds 5. If it exceeds, the packaging equipment immediately stops, and after the operator troubleshoots and removes the cigarette packs with quality defects, it is reset and powered on again. If it does not exceed, the subsequent steps are carried out without stopping. Step 5: For defective cigarette packs, they enter the small box transparent paper folding and encapsulation wheel from the first cigarette pack conveying channel, and the small box transparent paper conveying device stops conveying the transparent paper. Step 6: The defective cigarette packs enter the second cigarette pack conveying channel and reach the cigarette pack lifting channel. Step 7: The cigarette pack lifting channel stops lifting upward. Step 8: Under the action of the subsequent forward pushing of the cigarette packs, the defective cigarette packs fall into the third cigarette pack conveying channel, and the third cigarette pack conveying channel removes the defective cigarette packs to the cigarette pack removal bucket.

5. The cigarette pack appearance detection system according to claim 1, characterized in that: A pair of opposed grating sensors are provided at the left end of the horizontal negative pressure pushing channel; the pair of opposed grating sensors are provided on the upper and lower plates of the horizontal negative pressure pushing channel.

6. The cigarette pack appearance detection system according to claim 1, characterized in that: Second pair of opposed grating sensors are provided on the left and right side plates of the photographing and feeding track, and the distance from the second pair of opposed grating sensors to the cigarette pack outlet is greater than the width between the front and rear ends of a cigarette pack.

7. The cigarette pack appearance detection system according to claim 1, characterized in that: The bottom plates of the inclined conveying channel and the horizontal negative pressure pushing channel are support panels; the bottom of the photographing and feeding track is a horizontal conveyor belt; a transition horizontal panel is also provided between the photographing and feeding track and the horizontal negative pressure pushing channel; several air extraction holes are provided on the bottom plate of the horizontal negative pressure pushing channel; a negative pressure chamber is provided corresponding to the air extraction holes on the lower side of the bottom plate of the horizontal negative pressure pushing channel; an electrically controlled air valve is provided on the air extraction duct of the negative pressure chamber.

8. The cigarette pack appearance detection system according to claim 1, characterized in that: A cigarette pack pushing device is further arranged at the rear side of the horizontal negative pressure pushing channel, and the cigarette pack pushing device is arranged corresponding to the cigarette pack outlet; The cigarette pack pushing device is a mechanical telescopic push rod device or a high-pressure air hole blowing device.

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