A machine vision-based device for detecting missing boxes in tobacco cartons.

Abstract

This invention discloses a machine vision-based device for detecting missing cigarette packs in the tobacco industry, relating to the field of tobacco industry detection technology. It includes a frame and a computing server mounted outside the frame. Two sets of straightening mechanisms are symmetrically distributed on the front of the frame, located below a tossing mechanism on one side. A smart recognition camera and supplementary lighting are mounted on the upper part of the support mechanism. Through the coordinated arrangement of the tossing and straightening mechanisms, this invention can automatically straighten and center cigarette packs that have shifted or tilted before identification. The flipping and rejection mechanism allows for the rejection of missing cigarette packs after passing through the computing server and undergoing detection, preventing problematic cigarettes from entering the market. The support mechanism allows for the adjustment of the acquisition angle and height of the smart recognition camera and supplementary lighting according to actual usage needs, making the adjustment process convenient and quick.

Description

Technical Field

[0001] This invention relates to the field of tobacco industry inspection technology, specifically to a device based on machine vision for detecting missing boxes in tobacco products. Background Technology

[0002] During the cigarette packaging production process, there is a problem of missing boxes in cartons. Missing boxes in cartons is a quality defect term in tobacco packaging equipment, which refers to the presence of missing boxes in the finished cigarette packs. Operators cannot detect this directly with the naked eye. Once such cigarettes enter the market, they not only harm the interests of consumers but also have an adverse impact on tobacco companies. Tobacco companies attach great importance to this issue. In order to eliminate this quality defect, it is necessary to rely on missing box detection devices to detect whether there are missing boxes in the carton.

[0003] Currently used solutions include weighing, photoelectric, and X-ray methods, but based on actual usage, none of them can completely solve this problem. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a machine vision-based device for detecting missing cigarette boxes in the tobacco industry. It features automatic alignment of cigarette boxes that have shifted or tilted before identification, improving recognition accuracy. After processing by a computing server, it effectively removes missing cigarette boxes, preventing problematic cigarettes from entering the market. Furthermore, it allows for convenient and quick adjustment of the acquisition angle and height of the intelligent recognition camera and supplementary lighting according to actual usage needs, thus solving the problems mentioned in the background technology.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned goals of automatically aligning and centering cigarette boxes that have shifted or tilted before identification, improving identification accuracy, and effectively rejecting missing boxes after processing by the computing server to prevent problematic cigarettes from entering the market, while also allowing for convenient and quick adjustment of the acquisition angle and height of the intelligent identification camera and supplementary lighting according to actual usage needs, this invention provides the following technical solution: A machine vision-based device for detecting missing boxes in tobacco cartons, comprising a frame and a computing server disposed outside the frame, wherein a conveyor roller is rotatably mounted inside the frame for conveying... A conveyor belt is installed on the outside of the roller along the length of the frame. The cigarette box to be tested is placed on the upper surface of the conveyor belt. A conveyor motor with its output end fixedly connected to the conveyor roller is installed on the outside of the frame. A toggle mechanism is set on the upper side of the frame above the conveyor belt. Two sets of straightening mechanisms are symmetrically distributed on the front of the frame on one side below the toggle mechanism. A flipping and rejecting mechanism is set on the other side of the frame. A support mechanism is set on the upper surface of the frame away from the toggle mechanism. A smart recognition camera and a supplementary light are installed on the upper part of the support mechanism. The computing server is electrically connected to the smart recognition camera and the supplementary light through wires.

[0008] Preferably, the actuating mechanism includes a support frame fixedly installed on the upper surface of the frame. A rotating shaft is rotatably connected to the upper part of the support frame along the length direction. A driving bevel gear is fixedly installed at one end of the rotating shaft. A driven bevel gear is meshed with the outside of the driving bevel gear. An actuating shaft rotatably installed on the frame is fixedly installed on the inner ring of the driven bevel gear. The actuating shaft is vertically arranged above the conveyor belt, and a rubber pad is sleeved and fixed on the outer surface of the actuating shaft.

[0009] Preferably, the straightening mechanism includes a dual-axis motor installed inside the frame and a driven rack slidably installed on the upper part of the frame. Both output ends of the dual-axis motor are fixedly mounted with drive shafts, and drive wheels are fixedly mounted on the outside of the drive shafts and the other end of the rotating shaft. A drive belt is installed on the outside of the drive wheels.

[0010] Preferably, a rotating rod is fixedly installed at the outer end of the drive shaft. The end of the rotating rod away from the drive shaft is rotatably connected to a drive rod via a rotating shaft. The end of the drive rod away from the rotating rod is rotatably connected to a vertically arranged drive rack via a rotating shaft. A driven gear rotatably mounted on the frame is meshed with the outer side of the drive rack. The driven rack is meshed with the lower part of the driven gear, and a pressure rod is fixedly installed at one end of the driven rack above the conveyor belt. Inside the frame, a bent guide plate is fixedly installed above the conveyor belt along the horizontal direction. The guide plate is divided into two groups, front and rear, and the two groups of guide plates are symmetrically distributed.

[0011] Preferably, a guide rod is fixedly installed on the outer surface of the frame in the vertical direction, the active rack is inserted through the guide rod along the length direction, and a through groove is opened on the outer surface of the guide rod.

[0012] Preferably, the flipping rejection mechanism includes an electric telescopic rod and a mounting frame, which are fixedly installed on the outside of the frame and electrically connected to the electric telescopic rod via wires. A flipping shaft is rotatably installed on one side of the mounting frame, and an inclined material dropping plate is rotatably installed on the outside of the mounting frame via the flipping shaft. The material dropping plate is located on the lower side of the conveyor belt. A flipping wheel is fixedly installed on the outer end of the flipping shaft, and two symmetrically arranged V-shaped limiting grooves are opened on the outer surface of the flipping wheel.

[0013] Preferably, a guide sleeve and a protrusion are fixedly installed on the outer surface of the mounting bracket along the extension direction. An insert block with one end shaped like an isosceles triangle slides through the inside of the guide sleeve. The triangular end of the insert block is inserted into a limiting groove, and a roller inserted into the limiting groove is rotatably installed on the triangular end of the insert block. A guide shaft is fixedly installed on the other end of the insert block and inserted through the protrusion. The end of the guide shaft away from the insert block abuts against the telescopic end of the electric telescopic rod, and a first return spring is sleeved on the outside of the guide shaft. The two ends of the first return spring abut against the insert block and the protrusion, respectively.

[0014] Preferably, an inclined guide frame is fixedly installed on one side of the frame below the blanking plate, and a plurality of guide rollers arranged in a linear array are rotatably installed in the inner extension direction of the guide frame.

[0015] Preferably, the support mechanism includes a first support rod that is fixedly installed vertically on the upper surface of the frame and is hollow inside. A second support rod that extends upward outward is slidably installed inside the first support rod. An installation rod is rotatably installed on the upper end of the second support rod. The intelligent recognition camera and the supplementary light are respectively installed on the installation rod. A through guide groove is opened in the upper part of the second support rod, and a sliding rod is inserted into the second support rod along its length. A top block that is slidably disposed inside the guide groove is fixedly installed on the upper end of the sliding rod. An inverted U-shaped pressure plate that fits onto the upper end of the second support rod is fixedly installed on the upper surface of the top block, and a first anti-slip pad that abuts against the lower surface of the installation rod is fixedly installed in the middle of the top block. An elastic rod is fixedly installed vertically on the lower side of the top block, and a right-angled triangular locking block is fixedly installed on the lower part of the elastic rod. A fixing block located directly below the locking block is fixedly installed on the upper side of the second support rod.

[0016] Preferably, a second return spring is sleeved on the upper part of the sliding rod, and the upper and lower ends of the second return spring abut against the lower surface of the top block and the inner bottom wall of the guide groove, respectively. A first pressure block in the shape of an isosceles trapezoid is fixedly installed on the lower end of the sliding rod and is slidably disposed inside the second support rod. Second pressure blocks are slidably installed on both sides of the lower part of the second support rod. The inner end of the second pressure block is shaped like a slope and abuts against the outer side of the first pressure block. A second anti-slip pad is fixedly installed on the outer end of the second pressure block and abuts against the inner side wall of the first support rod.

[0017] (III) Beneficial Effects

[0018] Compared with existing technologies, the present invention provides a machine vision-based device for detecting missing boxes in tobacco cartons, which has the following advantages:

[0019] 1. This machine vision-based device for detecting missing cigarette boxes in the tobacco industry, through the coordinated setting of a tossing mechanism and a straightening mechanism, can automatically straighten and center cigarette boxes that have shifted or tilted in position before identification and detection. This facilitates image acquisition and recognition by the intelligent recognition camera, which is beneficial to the normal operation of the identification and detection work and can improve the recognition accuracy to a certain extent.

[0020] 2. This machine vision-based device for detecting missing boxes in cigarette cartons in the tobacco industry, through the setting of a flipping rejection mechanism, can remove the missing boxes of cigarettes to be tested after passing through a computing server and detection. The rejection accuracy is high and the reliability is good, which can effectively prevent them from being mixed into the products without problems, ensure production quality, solve the current problem of missing boxes in cigarette cartons, and prevent defective cigarettes from entering the market.

[0021] 3. This machine vision-based device for detecting missing boxes in tobacco products allows for adjustments to the angle and height of the intelligent recognition camera and supplementary lighting according to actual usage needs through the setting of the support mechanism. The adjustment process is convenient, quick, easy to operate, and facilitates subsequent adjustments, thus improving the practicality and flexibility of the device. Attached Figure Description

[0022] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a rear-view stereoscopic structural diagram of the present invention;

[0024] Figure 3 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B;

[0026] Figure 5 This is a schematic diagram of the side cross-sectional structure of the present invention;

[0027] Figure 6 For the present invention Figure 1 Enlarged structural diagram at point C;

[0028] Figure 7 This is a schematic diagram of a partial cross-sectional view of the present invention.

[0029] Figure 8 This is a frontal sectional view of the support mechanism of the present invention;

[0030] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point D.

[0031] In the diagram: 1. Frame; 2. Conveyor belt; 3. Actuating mechanism; 301. Support frame; 302. Rotating shaft; 303. Driving bevel gear; 304. Driven bevel gear; 305. Actuating shaft; 4. Straightening mechanism; 401. Dual-shaft motor; 402. Transmission shaft; 403. Rotating rod; 404. Transmission rod; 405. Driving rack; 406. Driven gear; 407. Driven rack; 408. Pressure rod; 409. Guide rod; 4010. Through groove; 5. Guide plate; 6. Tilting and rejecting mechanism; 601. Tilting wheel; 602. Limiting groove; 603. Guide sleeve; 604. Insert block; 605. Guide shaft; 606. First return spring; 607. Electric telescopic rod; 608. Roller; 6 9. Protrusion; 7. Material drop plate; 8. Conveyor motor; 9. Support mechanism; 901. First support rod; 902. Second support rod; 903. Sliding rod; 904. Guide groove; 905. Top block; 906. Second return spring; 907. First anti-slip pad; 908. Mounting rod; 909. Elastic rod; 9010. Locking block; 9011. Fixing block; 9012. First pressure block; 9013. Second pressure block; 9014. Second anti-slip pad; 9015. Pressure plate; 10. Intelligent recognition camera; 11. Supplementary light; 12. Guide frame; 13. Guide roller; 14. Transmission wheel; 15. Transmission belt; 16. Mounting frame; 17. Tilting shaft; 18. Conveyor roller; 19. Cigarette box to be tested. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Please see Figures 1 to 5 This invention provides a technical solution: a device based on machine vision for detecting missing cigarette boxes in tobacco products, comprising a frame 1 and a computing server disposed outside the frame 1. A conveyor roller 18 is rotatably mounted inside the frame 1. A conveyor belt 2 is mounted along the length of the frame 1 outside the conveyor roller 18. A cigarette box 19 to be tested is placed on the upper surface of the conveyor belt 2. A conveyor motor 8, with its output end fixedly connected to the conveyor roller 18, is mounted outside the frame 1. A toggle mechanism 3 is disposed on the upper side of the frame 1 above the conveyor belt 2. Two sets of straightening mechanisms 4, symmetrically distributed front-to-back on the front of the frame 1, are disposed on one side of the frame 1 below the toggle mechanism 3. A flipping and rejecting mechanism 6 is disposed on the other side of the frame 1. A support mechanism 9 is provided on the upper surface of the rack 1 away from the actuation mechanism 3. A smart recognition camera 10 and a fill light 11 are installed on the upper part of the support mechanism 9. The computing server is electrically connected to the smart recognition camera 10 and the fill light 11 through wires. The actuation mechanism 3 includes a support frame 301 fixedly installed on the upper surface of the rack 1. A rotating shaft 302 is rotatably connected to the upper part of the support frame 301 along the length direction. A driving bevel gear 303 is fixedly installed at one end of the rotating shaft 302. A driven bevel gear 304 is meshed with the outside of the driving bevel gear 303. An actuation shaft 305 is rotatably installed on the inner ring of the driven bevel gear 304. The actuation shaft 305 is vertically arranged. On the upper side of the conveyor belt 2, a rubber pad is fixedly fitted onto the outer surface of the actuating shaft 305. The straightening mechanism 4 includes a dual-axis motor 401 installed inside the frame 1 and a driven rack 407 slidably installed on the upper part of the frame 1. Both output ends of the dual-axis motor 401 are fixedly mounted with drive shafts 402. Drive wheels 14 are fixedly mounted on the outside of the drive shaft 402 and the other end of the rotating shaft 302. A drive belt 15 is installed on the outside of the drive wheels 14. A rotating rod 403 is fixedly mounted on the outer end of the drive shaft 402. The end of the rotating rod 403 away from the drive shaft 402 is rotatably connected to a drive rod 404 via a rotating shaft. The end of the drive rod 404 away from the rotating rod 403 is rotatably connected to a vertically aligned drive rod 404 via a rotating shaft. A drive rack 405 is oriented in a certain direction. A driven gear 406 is rotatably connected to the outer side of the drive rack 405 and mounted on the frame 1. A driven rack 407 is meshed with the lower part of the driven gear 406. A pressure rod 408 is fixedly installed above the conveyor belt 2 at one end of the driven rack 407. A bent guide plate 5 is fixedly installed above the conveyor belt 2 inside the frame 1 in a horizontal direction. The guide plate 5 is divided into two groups, front and rear, and the two groups of guide plates 5 are symmetrically distributed. A guide rod 409 is fixedly installed on the outer surface of the frame 1 in a vertical direction. The drive rack 405 is inserted through the guide rod 409 along the length direction. A through groove 4010 is opened on the outer surface of the guide rod 409.

[0035] In use, the cigarette boxes 19 to be tested are placed sequentially from the left end of the frame 1 onto the conveyor belt 2. The conveyor belt 2 then transports the cigarette boxes 19 from left to right. Simultaneously, the output of the dual-axis motor 401 drives the transmission shaft 402 to rotate. The transmission shaft 402 then drives the rotating shaft 302 to rotate via the transmission wheel 14 and the transmission belt 15. Finally, the rotating shaft 302 drives the actuating shaft 305 to rotate clockwise via the driving bevel gear 303 and the driven bevel gear 304. During this process, when the length direction of the cigarette box 19 to be tested is not aligned with the length direction of the frame 1 and it tilts significantly, since the width of the conveyor belt 2 is slightly larger than the length of the cigarette box 19, the tilted end of the cigarette box 19 will touch the clockwise rotating actuating shaft 305, thus actuating the cigarette box 19 that is moving to the right. This initial actuation can reduce the tilt angle of the cigarette box 19. At the same time, the transmission shaft 402 will also push and pull the transmission rod 404 back and forth via the rotating rod 403. The upper end of the transmission rod 404 can drive the active rack 405 to slide up and down reciprocally. The active rack 405 then drives the pressure rod 408 to slide back and forth reciprocally through the driven gear 406 and the driven rack 407. This allows the pressure rods 408 at both ends to simultaneously squeeze, straighten, and center the cigarette box 19 to be tested, which has been initially adjusted. This ensures that the cigarette box 19 is located in the middle of the conveyor belt 2 and its length direction is parallel to the length direction of the conveyor belt 2. Finally, it is transported to the intelligent recognition camera 10 and the supplementary light 11 by the guide plate 5. The intelligent recognition camera 10 captures images of the cigarette box 19 to be tested and transmits the captured images to the computing server to determine whether the cigarette box 19 is missing a box. Before recognition and detection, the camera automatically straightens and centers any cigarette boxes 19 that have shifted or tilted, which facilitates image capture and recognition by the intelligent recognition camera 10. This is beneficial for the normal operation of the recognition and detection work and can improve the recognition accuracy to a certain extent.

[0036] Example 2

[0037] Please see Figure 1 , Figure 6 and Figure 7This invention provides a technical solution: a device based on machine vision for detecting missing boxes in tobacco products. The flipping and rejecting mechanism 6 includes an electric telescopic rod 607, which is fixedly installed outside a frame 1 and electrically connected to an electric telescopic rod 607 via a wire, and a mounting frame 16. A flipping shaft 17 is rotatably mounted on one side of the mounting frame 16, and an inclined dropping plate 7 is rotatably mounted outside the mounting frame 16 via the flipping shaft 17. The dropping plate 7 is located below the conveyor belt 2. A flipping wheel 601 is fixedly mounted on the outer end of the flipping shaft 17. Two symmetrically arranged V-shaped limiting grooves 602 are formed on the outer surface of the flipping wheel 601. Guide sleeves 603 and protrusions 609 are fixedly mounted on the outer surface of the mounting frame 16 along its extension direction. The guide sleeves 603 are internally penetrating... A sliding insert 604 with one end shaped like an isosceles triangle is inserted into a limiting groove 602. A roller 608 inserted into the limiting groove 602 is rotatably mounted on the triangular end of the insert 604. A guide shaft 605 is fixedly mounted on the other end of the insert 604 and inserted into a protrusion 609. The end of the guide shaft 605 away from the insert 604 abuts against the telescopic end of the electric telescopic rod 607. A first return spring 606 is sleeved on the outside of the guide shaft 605. The two ends of the first return spring 606 abut against the insert 604 and the protrusion 609, respectively. A guide frame 12 is fixedly mounted on one side of the frame 1 below the blanking plate 7. A number of guide rollers 13 arranged in a linear array are rotatably mounted inside the guide frame 12 in the extension direction.

[0038] In use, after being identified and detected by the intelligent recognition camera 10 and the computing server, the cigarette box 19 to be tested, which has no missing box problem, is transported by the conveyor belt 2 to the inclined drop plate 7 and exited from the device through the drop plate 7. When the identification detects a problem with the cigarette box 19, the computing server sends a signal to the electric telescopic rod 607 and controls the telescopic end of the electric telescopic rod 607 to retract and separate from the outer end of the guide shaft 605. At this time, when the cigarette box 19 falls back onto the drop plate 7, it will press the drop plate 7 with its own gravity, causing the drop plate 7 to rotate counterclockwise on the mounting frame 16 with the flip shaft 17. Then the cigarette box 19 will slide onto the guide roller 13 in the guide frame 12 and finally exit from the device through the guide roller 13. During the rotation of the drop plate 7, the flip shaft 17 will also drive the flip wheel 601 to rotate synchronously, and push the insert block 604 through the limit groove 602 to disengage from the limit groove 602. At the same time, it will also affect the first A return spring 606 is compressed, and when the cigarette box 19 under test presses the material feeding plate 7 to rotate, it provides a flipping force to the cigarette box 19 under test. Therefore, after the cigarette box 19 under test slides from the material feeding plate 7 onto the guide roller 13, the material feeding plate 7 will continue to rotate counterclockwise due to inertia until the rebound force of the first return spring 606 pushes the insert 604 into another limiting groove 602. At the same time, the computing server will also control the telescopic end of the electric telescopic rod 607 to extend back to its original position and abut against the outer end of the guide shaft 605, thereby fixing the insert 604, the flipping wheel 601, the flipping shaft 17 and the material feeding plate 7, and waiting to receive the next cigarette box 19 under test. This mechanism can realize the rejection of the cigarette box 19 with missing boxes after passing through the computing server and detection. The rejection accuracy is high and the reliability is good. It can effectively prevent it from being mixed into the products without problems, ensure production quality, solve the current problem of missing boxes in the carton, and prevent problematic cigarettes from entering the market.

[0039] Example 3

[0040] Please see Figure 1 , Figure 2 , Figure 8 and Figure 9This invention provides a technical solution: a device based on machine vision for detecting missing boxes in tobacco products. The support mechanism 9 includes a first support rod 901, vertically fixed to the upper surface of a frame 1 and hollow inside. A second support rod 902, extending upwards, is slidably installed inside the first support rod 901. An mounting rod 908 is rotatably installed at the upper end of the second support rod 902. A smart recognition camera 10 and a supplementary light 11 are respectively mounted on the mounting rod 908. A through guide groove 904 is formed in the upper part of the second support rod 902, and a sliding rod 903 is inserted along its length inside the second support rod 902. A top block 905, slidably disposed inside the guide groove 904, is fixedly installed at the upper end of the sliding rod 903. An inverted U-shaped pressure plate 9015, sleeved on the upper end of the second support rod 902, is fixedly installed on the upper surface of the top block 905, abutting against the lower surface of the mounting rod 908. 7. An elastic rod 909 is vertically fixedly installed on the lower side of the top block 905. A right-angled triangular locking block 9010 is fixedly installed on the lower part of the elastic rod 909. A fixing block 9011 located directly below the locking block 9010 is fixedly installed on the upper side of the second support rod 902. A second return spring 906 is sleeved on the upper part of the sliding rod 903. The upper and lower ends of the second return spring 906 abut against the lower surface of the top block 905 and the inner bottom wall of the guide groove 904, respectively. The lower end of 03 is fixedly installed with a first pressure block 9012 that is slidably disposed inside the second support rod 902 and is in the shape of an isosceles trapezoid. The lower two sides of the second support rod 902 are slidably installed with second pressure blocks 9013. The inner end of the second pressure block 9013 is in the shape of a slope, and the inner end of the second pressure block 9013 abuts against the outer side of the first pressure block 9012. The outer end of the second pressure block 9013 is fixedly installed with a second anti-slip pad 9014 that abuts against the inner side wall of the first support rod 901.

[0041] In use, it provides a reliable and stable installation position for the intelligent recognition camera 10 and the supplementary light 11. Pressing down on the pressure plate 9015 causes the top block 905 to slide downward, allowing the first anti-slip pad 907 to disengage from the mounting rod 908 and locking the locking block 9010 into the lower part of the fixing block 9011. At the same time, the second return spring 906, which is in a semi-compressed state, is further compressed. At this time, the mounting rod 908 can rotate on the second support rod 902 to adjust the acquisition and illumination angles of the intelligent recognition camera 10 and the supplementary light 11. While the top block 905 slides downward, it also presses the sliding rod 903 and the first pressure block 9012 downward, causing the first pressure block 9012 to disengage from the second pressure block 9013. This reduces the clamping force of the second pressure block 9013 and the second anti-slip pad 9014 on the first support rod 901. At this time, the second support rod 902 can be moved up and down by moving the mounting rod 908 to the first support rod 901. The rod 901 slides upwards to adjust the height of the mounting rod 908, the intelligent recognition camera 10, and the supplementary light 11. After adjusting to a suitable height and angle, the lower end of the elastic rod 909 is pulled outwards to disengage the locking block 9010 from the fixing block 9011. Then, under the rebound force of the second return spring 906, the top block 905 is pushed back to its original position, and the first anti-slip pad 907 is pressed tightly onto the mounting rod 908, thus fixing the mounting rod 908 to the second support rod 902. At the same time, the first pressure block 9012 is pulled to press against the inner end of the second pressure block 9013, thereby pressing the second anti-slip pad 9014 tightly onto the inner surface of the first support rod 901, thus fixing the second support rod 902 onto the first support rod 901. Ultimately, this achieves the purpose of adjusting the acquisition and illumination angle and height of the intelligent recognition camera 10 and the supplementary light 11 according to actual usage needs, facilitating later adjustments and improving the practicality and flexibility of the device.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machine vision-based device for detecting missing boxes in tobacco cartons, comprising a rack and a computing server disposed outside the rack, characterized in that: The frame is internally mounted with a conveyor roller, and a conveyor belt is mounted on the outside of the conveyor roller along the length of the frame. The cigarette box to be tested is placed on the upper surface of the conveyor belt. A conveyor motor with its output end fixedly connected to the conveyor roller is mounted on the outside of the frame. A toggle mechanism is set on the upper side of the frame above the conveyor belt. Two sets of straightening mechanisms are symmetrically distributed on the front of the frame on one side below the toggle mechanism. A flipping and rejecting mechanism is set on the other side of the frame. A support mechanism is set on the upper surface of the frame away from the toggle mechanism. A smart recognition camera and a supplementary light are installed on the upper part of the support mechanism. The computing server is electrically connected to the smart recognition camera and the supplementary light through wires. The flipping rejection mechanism includes an electric telescopic rod and a mounting frame, which are fixedly installed on the outside of the frame and electrically connected to the electric telescopic rod via wires. A flipping shaft is rotatably installed on one side of the mounting frame, and an inclined material dropping plate is rotatably installed on the outside of the mounting frame via the flipping shaft. The material dropping plate is located on the lower side of the conveyor belt. A flipping wheel is fixedly installed on the outer end of the flipping shaft, and two symmetrically arranged V-shaped limiting grooves are opened on the outer surface of the flipping wheel. Guide sleeves and protrusions are fixedly installed on the outer surface of the mounting bracket along its extension direction. An insert block with one end shaped like an isosceles triangle slides through the inside of the guide sleeve. The triangular end of the insert block is inserted into a limiting groove, and a roller inserted into the limiting groove is rotatably installed on the triangular end of the insert block. A guide shaft is fixedly installed on the other end of the insert block, which is inserted through the protrusion. The end of the guide shaft away from the insert block abuts against the telescopic end of the electric telescopic rod, and a first return spring is sleeved on the outside of the guide shaft. The two ends of the first return spring abut against the insert block and the protrusion, respectively.

2. The device for detecting missing boxes in tobacco cartons based on machine vision according to claim 1, characterized in that: The actuating mechanism includes a support frame fixedly installed on the upper surface of the frame. A rotating shaft is rotatably connected to the upper part of the support frame along the length direction. A driving bevel gear is fixedly installed at one end of the rotating shaft. A driven bevel gear is meshed with the outside of the driving bevel gear. An actuating shaft rotatably installed on the frame is fixedly installed on the inner ring of the driven bevel gear. The actuating shaft is vertically arranged above the conveyor belt, and a rubber pad is sleeved and fixed on the outer surface of the actuating shaft.

3. The device for detecting missing boxes in tobacco cartons based on machine vision according to claim 2, characterized in that: The straightening mechanism includes a dual-axis motor installed inside the frame and a driven rack slidably installed on the upper part of the frame. Both output ends of the dual-axis motor are fixedly mounted with drive shafts. Drive wheels are fixedly mounted on the outside of the drive shafts and the other end of the rotating shaft. Drive belts are installed on the outside of the drive wheels.

4. The device for detecting missing boxes in tobacco cartons based on machine vision according to claim 3, characterized in that: A rotating rod is fixedly installed at the outer end of the drive shaft. The end of the rotating rod away from the drive shaft is rotatably connected to a drive rod via a rotating shaft. The end of the drive rod away from the rotating rod is rotatably connected to a vertically arranged drive rack via a rotating shaft. A driven gear rotatably mounted on the frame is meshed with the outer side of the drive rack. The driven rack is meshed with the lower part of the driven gear, and a pressure rod is fixedly installed above the conveyor belt at one end of the driven rack. Inside the frame, a bent guide plate is fixedly installed above the conveyor belt along the horizontal direction. The guide plate is divided into two groups, front and rear, and the two groups of guide plates are symmetrically distributed.

5. The device for detecting missing boxes in tobacco cartons based on machine vision according to claim 4, characterized in that: A guide rod is fixedly installed on the outer surface of the frame in the vertical direction. The active rack is inserted through the guide rod along the length direction, and a through groove is opened on the outer surface of the guide rod.

6. The device for detecting missing boxes in tobacco cartons based on machine vision according to claim 1, characterized in that: An inclined guide frame is fixedly installed on one side of the frame below the blanking plate, and several guide rollers arranged in a linear array are rotatably installed in the inner extension direction of the guide frame.

7. The device for detecting missing boxes in tobacco cartons based on machine vision according to claim 1, characterized in that: The support mechanism includes a first support rod that is vertically fixed to the upper surface of the frame and is hollow inside. A second support rod that extends upward outward is slidably installed inside the first support rod. An installation rod is rotatably installed at the upper end of the second support rod. The intelligent recognition camera and the supplementary light are respectively installed on the installation rod. A through guide groove is opened in the upper part of the second support rod, and a sliding rod is inserted into the second support rod along its length. A top block that is slidably disposed inside the guide groove is fixedly installed at the upper end of the sliding rod. An inverted U-shaped pressure plate that fits onto the upper end of the second support rod is fixedly installed on the upper surface of the top block, and a first anti-slip pad that abuts against the lower surface of the installation rod is fixedly installed in the middle of the top block. An elastic rod is fixedly installed vertically on the lower side of the top block, and a right-angled triangular locking block is fixedly installed at the lower part of the elastic rod. A fixing block located directly below the locking block is fixedly installed on the upper side of the second support rod.

8. The device for detecting missing boxes in tobacco cartons based on machine vision according to claim 7, characterized in that: The upper part of the sliding rod is fitted with a second return spring. The upper and lower ends of the second return spring abut against the lower surface of the top block and the inner bottom wall of the guide groove, respectively. The lower end of the sliding rod is fixedly installed with a first pressure block that is slidably disposed inside the second support rod and is in the shape of an isosceles trapezoid. The lower two sides of the second support rod are slidably installed with second pressure blocks. The inner end of the second pressure block is in the shape of a slope and abuts against the outer side of the first pressure block. The outer end of the second pressure block is fixedly installed with a second anti-slip pad that abuts against the inner side wall of the first support rod.

Images