An intelligent visual detection device and control system based on carton production

Abstract

The application discloses an intelligent visual detection device and control system based on carton production, and relates to the technical field of visual detection. The application is characterized by the following: a side imaging mechanism is arranged on one side of the carton sealing machine; the side imaging mechanism is driven by a follow-up transmission mechanism to obtain power from the side wall of the running carton, drive the imaging collection mechanism to move at the same speed as the carton along the linear sliding table module, and make the fixed-focus lens continuously collect lateral images by aligning the crease section all the time. The crease section dynamic online detection of the whole process of the cover folding is realized, the continuous state of the crease fiber from the initial deformation to the maximum deformation can be recorded completely, reliable imaging support is provided for the identification of hidden fatigue defects such as inner layer fiber hidden cracks, the quality control dimension of the carton sealing visual detection is effectively expanded, and the structural strength and long-term storage and transportation performance of the carton are ensured.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, and in particular to an intelligent visual inspection device and control system for cardboard box production. Background Technology

[0002] In the cardboard box production and post-sealing process, automatic carton sealing equipment can continuously complete carton folding and gluing sealing operations. It is a core piece of equipment in large-scale logistics packaging production processes in industries such as e-commerce warehousing, food, and pharmaceuticals. Intelligent vision inspection and control systems have been gradually applied to carton sealing quality control scenarios, which can automatically identify various sealing appearance defects, accurately reject unqualified products, and effectively ensure the sealing accuracy and transportation protection performance of cardboard boxes. However, existing intelligent vision inspection devices for cardboard box production still have the following shortcomings in use: Existing visual inspection units all use fixed-station installation methods, generally only conducting static appearance inspections on the alignment accuracy and gap size after the flap is closed. They lack side-view scanning mechanisms that move synchronously with the flap bending action, making it impossible to obtain dynamic imaging of the crease cross-section from the side. This results in the inability to capture hidden fiber cracks in the creases during the dynamic bending process of the carton sealing flap online. These internal fiber crack defects are not obvious under static appearance and cannot be identified by conventional inspection methods. Under subsequent stacking, drop, and other storage and transportation conditions, the flap is prone to breakage along the hidden cracks; this directly reduces the structural strength and service life of the carton, weakening its protective effect on the contents during transportation. Summary of the Invention

[0003] The purpose of this application is to provide an intelligent visual inspection device and control system for paper box production, which can effectively solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: an intelligent visual inspection device based on cardboard box production, comprising a carton sealing machine, wherein a side-view imaging mechanism is provided on one side of the carton sealing machine; the side-view imaging mechanism includes: The linear slide module is located on one side of the carton sealing machine; An imaging acquisition mechanism is mounted on a linear slide module via a mounting slide; the imaging acquisition mechanism includes an industrial camera located on one side of the carton sealing machine and a fixed-focus lens located on the industrial camera, the fixed-focus lens being positioned facing the side of the carton conveyor. And a follow-up transmission mechanism is set on the linear slide module; when the carton is conveyed by the carton sealing machine, the follow-up transmission mechanism is allowed to drive the imaging acquisition mechanism to move synchronously; when the carton is sealed by the carton sealing machine, the follow-up transmission mechanism is allowed to drive the imaging acquisition mechanism to move in the opposite direction and reset.

[0005] Preferably, the linear slide module includes a first mounting frame, a pair of first slide rails, and a slider; the first mounting frame is fixed to the carton sealing machine, and the length direction of the first mounting frame is parallel to the carton conveying direction; the pair of first slide rails are disposed on the first mounting frame, and the slider is slidably connected to the first slide rails; the mounting slide is fixed to the slider.

[0006] Preferably, the follow-up transmission mechanism includes a mounting plate, a follow-up roller, a first belt, a second belt, a connecting plate, a reset mechanism, a pair of first pulleys, and a second pulley. The mounting plate is fixed to the first mounting frame. The follow-up roller is rotatably connected to the mounting plate around its axis. The outer circumferential surface of the follow-up roller is covered with an adhesive layer. When the cardboard box is conveyed to the position of the follow-up roller, the side wall of the cardboard box abuts against the adhesive layer of the follow-up roller, causing the follow-up roller to rotate around its axis. The pair of first pulleys are rotatably connected to the mounting plate around their axes, and one of the first pulleys is coaxially connected to the follow-up roller. The first belt is tensioned on the pair of first pulleys. The pair of second pulleys are rotatably connected to the first mounting frame around their axes. The second belt is tensioned on the pair of second pulleys, and one of the first pulleys and one of the second pulleys are coaxially connected via a rotating shaft. One side of the second belt is connected to the mounting slide via a connecting plate. The reset mechanism is disposed on the first mounting frame and is used to drive the imaging acquisition mechanism on the mounting slide to move and then reset.

[0007] Preferably, the reset mechanism includes a connecting rope, a second mounting frame, a second slide rail, a counterweight, and a pulley; the second mounting frame is fixed to the first mounting frame, the second slide rail is vertically arranged on the second mounting frame, the counterweight is slidably connected to the second slide rail, the pulley is arranged on the first mounting frame, one end of the connecting rope is connected to the second belt, and the other end of the connecting rope passes around the pulley and is connected to the counterweight.

[0008] Preferably, a supplementary lighting mechanism is provided on one side of the side-view imaging mechanism; the supplementary lighting mechanism includes an annular diffuse reflection light source, a side guide light strip, and an angle adjustment mounting mechanism; the annular diffuse reflection light source is located on one side of the side-view imaging mechanism, the side guide light strip is located in the mounting groove at the bottom of the annular diffuse reflection light source, the angle adjustment mounting mechanism is located on one side of the side-view imaging mechanism, and the annular diffuse reflection light source is fixed to the angle adjustment mounting mechanism; the angle adjustment mounting mechanism is used to adjust the angle at which the annular diffuse reflection light source illuminates the cardboard box.

[0009] Preferably, the angle adjustment mounting mechanism includes a mounting base, a rotating frame, a first positioning bolt, and an angle scale; the mounting base is disposed on the mounting slide, the rotating frame is hinged to the mounting base via a rotating shaft, the first positioning bolt is coaxially threaded to the mounting base, and the angle scale is disposed on the rotating frame; when the angle between the mounting base and the rotating frame is adjusted, the angle between the mounting base and the rotating frame can be locked by rotating the first positioning bolt.

[0010] Preferably, the mounting base has a sliding groove, the length direction of which is perpendicular to the paper box conveying direction; the mounting base is provided with a second positioning bolt, one end of which passes through the sliding groove and is threaded into the mounting slide.

[0011] Preferably, the carton sealing machine is equipped with a bending angle triggering mechanism; the bending angle triggering mechanism includes an encoder, a positioning photoelectric switch, a sensing baffle, and a slotted photoelectric switch; the encoder is coaxially connected to the follower roller shaft; the positioning photoelectric switch is mounted on the carton sealing machine; the sensing baffle is mounted on the mounting slide, and the slotted photoelectric switch is mounted on one side of the first mounting bracket; the detection slot opening of the slotted photoelectric switch faces the direction of movement of the mounting slide and is aligned with the movement path of the sensing baffle.

[0012] Preferably, the bending angle triggering mechanism further includes a controller mounted on the carton sealing machine; the encoder, positioning photoelectric switch, slotted photoelectric switch, annular diffuse reflection light source, and fixed-focus lens are all connected to the controller via signal control.

[0013] A smart visual inspection and control system based on cardboard box production employs the aforementioned smart visual inspection device for cardboard box production; specifically, it includes an image processing module and a motion control module; both the image processing module and the motion control module are connected to the controller via signal control; the image processing module receives and processes image data collected by the imaging acquisition mechanism; the motion control module provides data support for the synchronous movement of the imaging acquisition mechanism and the position and angle adjustment of the supplementary lighting mechanism.

[0014] In summary, the technical effects and advantages of this invention are as follows: 1. This invention employs a side-view imaging mechanism, utilizing a follow-up transmission mechanism to obtain power from the side wall of the moving cardboard box. This power drives the imaging acquisition mechanism to move synchronously with the cardboard box along a linear slide module, ensuring the fixed-focus lens continuously captures side images of the crease cross-section throughout the entire folding process. This enables dynamic online detection of the crease cross-section during the entire folding and bending process, completely recording the continuous state of the crease fibers from initial deformation to maximum deformation. This provides reliable imaging support for identifying hidden fatigue defects such as microcracks in the inner fiber layers.

[0015] 2. This invention employs a supplementary lighting mechanism, utilizing a ring-shaped diffuse light source to provide uniform diffuse basic illumination across the entire cross-section of the crease. A side guide light strip directs some of the light rays at an oblique angle into the gaps between the crease layers. This enhances the contrast between light and dark areas in the interlayer fiber structure of the corrugated paper, improving the imaging and identification of minute defects in the inner layers. Furthermore, the supplementary lighting mechanism moves synchronously with the imaging acquisition mechanism, maintaining a constant relative position between the supplementary lighting path and the imaging path throughout the process. This ensures uniform and consistent image illumination during dynamic detection, improving the accuracy of defect identification and operational stability.

[0016] 3. This invention, by setting up a bending angle triggering mechanism, utilizes an encoder that synchronously rotates with a follower roller to collect pulse signals, calculates the paper box's travel distance, and maps it to the real-time bending angle of the folded lid. Combined with a positioning photoelectric switch and a slotted photoelectric switch, it establishes dual mechanical position references for start and reset. It can precisely and synchronously initiate imaging acquisition and supplementary lighting within the critical range of crease deformation, achieving high repeatability of the trigger position. It can adapt to sealing production lines with different conveyor speeds, realizing automated and precise control of the detection sequence, while reducing the ineffective runtime of components and extending the overall service life of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of the present invention; Figure 3 This is a three-dimensional enlarged structural diagram of the side-view imaging mechanism, the supplementary lighting mechanism, and the bending angle triggering mechanism of the present invention; Figure 4 This is a three-dimensional magnified structural diagram of the imaging acquisition mechanism of the present invention; Figure 5 This is a three-dimensional enlarged structural diagram of the linear slide module of the present invention; Figure 6 This is a partially cross-sectional, enlarged three-dimensional structural diagram of the linear slide module of the present invention; Figure 7 This is a three-dimensional enlarged structural schematic diagram of the follower transmission mechanism of the present invention; Figure 8 This is a first-view, three-dimensional magnified structural diagram of the supplementary lighting mechanism of the present invention; Figure 9This is a second-view magnified three-dimensional structural diagram of the supplementary lighting mechanism of the present invention; Figure 10 This is a three-dimensional enlarged structural schematic diagram of the bending angle triggering mechanism of the present invention.

[0019] In the diagram: 1. Carton sealing machine; 2. Side-view imaging mechanism; 21. Linear slide module; 211. First mounting bracket; 212. First slide rail; 213. Slider; 22. Mounting slide; 23. Imaging acquisition mechanism; 231. Industrial camera; 232. Fixed-focus lens; 24. Follower transmission mechanism; 241. Mounting plate; 242. Follower roller; 243. First pulley; 244. First belt; 245. Second pulley; 246. Second belt; 247. Connecting plate; 248. Reset mechanism ; 2481. Connecting rope; 2482. Second mounting bracket; 2483. Second slide rail; 2484. Counterweight; 2485. Pulley; 3. Supplementary lighting mechanism; 31. Ring diffuse reflection light source; 32. Side guide light strip; 33. Angle adjustment mounting mechanism; 331. Mounting base; 332. Rotating frame; 333. First positioning bolt; 334. Angle scale; 4. Bending angle triggering mechanism; 41. Encoder; 42. Position photoelectric switch; 43. Induction baffle; 44. Slotted photoelectric switch. Detailed Implementation

[0020] 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.

[0021] Example 1: Please refer to Figures 1-4 The intelligent visual inspection device based on cardboard box production shown includes a carton sealing machine 1, with a side-view imaging mechanism 2 disposed on one side of the carton sealing machine 1. The side-view imaging mechanism 2 includes a linear slide module 21, an imaging acquisition mechanism 23, and a follow-up transmission mechanism 24. The linear slide module 21 is disposed on one side of the carton sealing machine 1. The imaging acquisition mechanism 23 is mounted on the linear slide module 21 via a mounting slide 22. The imaging acquisition mechanism 23 includes an industrial camera 231 disposed on one side of the carton sealing machine 1 and a fixed-focus lens 232 disposed on the industrial camera 231, with the fixed-focus lens 232 facing the side of the cardboard box conveyor. The follow-up transmission mechanism 24 is disposed on the linear slide module 21. When the carton is conveyed by the carton sealing machine 1, the follow-up transmission mechanism 24 is allowed to drive the imaging acquisition mechanism 23 to move synchronously. When the carton is sealed by the carton sealing machine 1, the follow-up transmission mechanism 24 is allowed to drive the imaging acquisition mechanism 23 to move in the opposite direction and reset.

[0022] It should be noted that the carton sealing machine 1 conveys the cartons forward along the conveying direction. When the carton reaches the detection station corresponding to the side-view imaging mechanism 2, the follow-up transmission mechanism 24 contacts the side wall of the carton and obtains power through friction, driving the mounting slide 22 to move forward at the same speed as the carton along the guide direction of the linear slide module 21. The imaging acquisition mechanism 23 on the mounting slide 22 moves synchronously with the mounting slide 22. The industrial camera 231 continuously aims at the crease section of the carton through the fixed-focus lens 232, continuously acquiring side section images throughout the process of the fold being gradually bent. After the carton completes the sealing operation and leaves the detection station, the follow-up transmission mechanism 24 loses the positive power input, driving the mounting slide 22 and the imaging acquisition mechanism 23 to move in the opposite direction to the initial position, waiting for the next carton to enter the station.

[0023] By using the follow-up structure of the side-view imaging mechanism, the imaging acquisition mechanism 23 can move synchronously with the moving cardboard box, capturing dynamic deformation images of the crease cross-section throughout the process. This overcomes the limitation of fixed-position cameras that can only capture the static appearance after the fold is closed, and can completely capture the deformation state of the crease during the entire bending process, providing a structural basis for the online detection of hidden cracks in the inner fiber layer of the crease.

[0024] See Figures 1-2 and Figure 5 The linear slide module 21 includes a first mounting frame 211, a pair of first slide rails 212, and a slider 213; the first mounting frame 211 is fixed to the carton sealing machine 1, and the length direction of the first mounting frame 211 is parallel to the carton conveying direction; the pair of first slide rails 212 are disposed on the first mounting frame 211, and the slider 213 is slidably connected to the first slide rails 212; the mounting slide 22 is fixed to the slider 213.

[0025] It should be noted that, under the traction force of the follow-up transmission mechanism 24, the mounting slide 22 drives the slider 213 to make linear reciprocating motion along the first slide rail 212 set on the first mounting frame 211. The pair of parallel first slide rails 212 jointly bear the overall weight of the slider 213 and the mounting slide 22, strictly limiting the direction of movement to be parallel to the direction of paper box conveying, avoiding lateral deviation of the imaging acquisition mechanism 23, and ensuring that the optical axis of the fixed-focus lens 232 is always vertically aligned with the crease section of the paper box.

[0026] The linear slide module 21 with a dual slide rail structure improves the motion stability and guiding accuracy of the imaging acquisition mechanism 23, effectively reduces the shaking amplitude during the motion, avoids blurring and ghosting in the imaging, and ensures the clarity of the crease cross-section image.

[0027] See Figures 5-7The follower transmission mechanism 24 includes a mounting plate 241, a follower roller 242, a first belt 244, a second belt 246, a connecting plate 247, a reset mechanism 248, a pair of first pulleys 243, and a second pulley 245. The mounting plate 241 is fixed to the first mounting bracket 211. The follower roller 242 is rotatably connected to the mounting plate 241 around its axis. The outer circumferential surface of the follower roller 242 is provided with an adhesive layer. When the cardboard box is conveyed to the position of the follower roller 242, the side wall of the cardboard box abuts against the adhesive layer of the follower roller 242, and drives the follower roller 242 to rotate around its axis. The pair of first pulleys 243 are rotatably connected around its axis. On the mounting plate 241, one of the first pulleys 243 is coaxially connected to the follower roller 242; the first belt 244 is tensioned on a pair of first pulleys 243; a pair of second pulleys 245 are rotatably connected to the first mounting frame 211 around their axis; the second belt 246 is tensioned on a pair of second pulleys 245, and one of the first pulleys 243 and one of the second pulleys 245 are coaxially connected by a rotating shaft; one side of the second belt 246 is connected to the mounting slide 22 through a connecting plate 247; the reset mechanism 248 is provided on the first mounting frame 211 and is used to drive the imaging acquisition mechanism 23 on the mounting slide 22 to move and then reset.

[0028] It should be noted that when the cardboard box is conveyed forward to the inspection station by the carton sealing machine 1, the side wall of the cardboard box abuts against the outer coating layer of the follower roller 242. The follower roller 242 rotates around its own axis by static friction. The follower roller 242 drives the first pulley 243 connected to the same axis to rotate synchronously. The first belt 244 drives the other first pulley 243 to rotate synchronously. The coaxial shaft drives the second pulley 245 to rotate synchronously. The second belt 246 rotates with the second pulley 245. The connecting plate 247 on the second belt 246 pulls the mounting slide 22 forward along the first slide rail 212, realizing the synchronous follow-up of the imaging acquisition mechanism 23 and the cardboard box. When the cardboard box leaves the follower roller 242, the reset mechanism 248 provides a reverse force, driving the mounting slide 22 and each transmission component to move in the opposite direction and return to the initial standby position.

[0029] The multi-stage belt drive structure, which uses friction to generate power, directly obtains power from the moving carton, eliminating the need for additional electrical control. The synchronization accuracy is not affected by electrical control delays, and it can adapt to sealing production lines with different conveying speeds, achieving stable synchronous motion imaging.

[0030] See Figures 5-7The reset mechanism 248 includes a connecting rope 2481, a second mounting frame 2482, a second slide rail 2483, a counterweight 2484, and a pulley 2485. The second mounting frame 2482 is fixed to the first mounting frame 211. The second slide rail 2483 is vertically arranged on the second mounting frame 2482. The counterweight 2484 is slidably connected to the second slide rail 2483. The pulley 2485 is arranged on the first mounting frame 211. One end of the connecting rope 2481 is connected to the second belt 246, and the other end of the connecting rope 2481 passes around the pulley 2485 and is connected to the counterweight 2484.

[0031] It should be noted that when the mounting slide 22 moves forward with the cardboard box, the second belt 246 drives the connecting rope 2481 to change the direction of movement along the pulley 2485, pulling the counterweight 2484 to slide vertically upward along the second slide rail 2483 on the second mounting frame 2482, converting kinetic energy into gravitational potential energy for storage; when the cardboard box is separated from the follower roller 242, the forward transmission resistance disappears, and the counterweight 2484 slides downward along the second slide rail 2483 under its own gravity, pulling the second belt 246 to rotate in the opposite direction through the connecting rope 2481, thereby driving the mounting slide 22 and the imaging acquisition mechanism 23 to smoothly return to the initial position.

[0032] The gravity reset structure of counterweight 2484 ensures a smooth and shock-free reset action, avoiding the elasticity decay problem of spring reset structures. The reset position accuracy remains stable over long-term operation, eliminating the need for frequent calibration. Combined with the pulley drive structure, it enables automatic reset without power, further improving the operational reliability of the device.

[0033] See Figures 8-9 A supplementary lighting mechanism 3 is provided on one side of the side-view imaging mechanism 2. The supplementary lighting mechanism 3 includes an annular diffuse reflection light source 31, a side guide light strip 32, and an angle adjustment mounting mechanism 33. The annular diffuse reflection light source 31 is provided on one side of the side-view imaging mechanism 2, and the side guide light strip 32 is provided in the mounting groove at the bottom of the annular diffuse reflection light source 31. A prism surface is provided at the light-emitting end of the side guide light strip 32. When the light emitted by the annular diffuse reflection light source 31 passes through the interior of the side guide light strip 32, it is guided to the bending position of the cardboard box after being refracted by the prism surface. The angle adjustment mounting mechanism 33 is provided on one side of the side-view imaging mechanism 2, and the annular diffuse reflection light source 31 is fixed to the angle adjustment mounting mechanism 33. The angle adjustment mounting mechanism 33 is used to adjust the angle at which the annular diffuse reflection light source 31 illuminates the cardboard box.

[0034] It should be noted that when the imaging acquisition mechanism 23 starts image acquisition, the supplementary lighting mechanism 3 simultaneously starts illumination. The ring diffuse light source 31 emits uniform diffuse white light, providing full-area basic illumination for the crease cross section. The side guide light strip 32 receives part of the light from the ring diffuse light source 31, directs the light and shoots it into the interlayer gap of the crease at an oblique angle, enhancing the light and dark contrast of the fiber structure. The angle adjustment mounting mechanism 33 can adjust the illumination angle of the ring diffuse light source 31 according to different specifications of cardboard boxes, so that the supplementary lighting effect is always in the optimal state. The supplementary lighting mechanism 3 moves synchronously with the mounting slide 22, keeping the relative position of the supplementary lighting path and the imaging light path constant throughout the process.

[0035] The dual-path lighting structure, consisting of a ring diffuse reflection light source 31 and a side guide light strip 32, ensures uniform basic illumination across the entire cross-section of the crease and enhances the light and shadow contrast between the interlayer gaps, significantly improving the imaging recognition of hidden cracks in the inner fiber layer. This solves the problem that a single light source cannot clearly present hidden defects in the inner layer. The lighting mechanism 3 moves synchronously with the imaging acquisition mechanism 23, ensuring stable and uniform illumination throughout the process, which can significantly improve the image quality and defect recognition accuracy of dynamic detection.

[0036] Specifically, the side guide strip 32 is divided into an incident end, a transmission section, and an exit end along the light propagation path. When the light source is guided to the incident end of the side guide strip 32, light is transmitted and collected through the incident end, mainly by refraction. The incident end face of the side guide strip 32 is in close contact with the exit surface of the annular diffuse reflection light source 31. The diffuse light emitted by the light source enters the PMMA light guide strip from the air, is refracted, and then enters the interior of the side guide strip 32. It is used to collect the scattered light emitted from the light source locally, gathering the light that originally radiated in all directions into the interior of the side guide strip 32, avoiding ineffective light loss, and improving light energy utilization. Then, the light source mainly undergoes total internal reflection. The light entering the interior of the side guide strip 32 has an incident angle greater than the critical angle of total internal reflection at the interface between PMMA and air. Therefore, it will be reflected in the side guide strip 32. Total internal reflection occurs continuously on both the upper and lower surfaces, allowing light to propagate forward along the length of the side guide light strip 32 with almost no light loss. Total internal reflection constrains the light propagation path, allowing the light to be directionally transmitted along the narrow side guide light strip 32 instead of scattering in all directions. When the light source is directed to the light-emitting end, the light source mainly relies on refraction. The light-emitting end face of the side guide light strip 32 is processed with a micro prism array, which disrupts the total internal reflection condition. When the light travels from the PMMA medium back to the air medium, it is refracted. The light that originally propagated along the axial direction of the side guide light strip 32 is reshaped by the prism into oblique parallel light at a certain angle and projected onto the interlayer gap of the cardboard box crease section. This adjusts the light-emitting angle, allowing the light to enter the corrugated layers of the cardboard box at the most suitable angle to form shadow contrast, thus enhancing the imaging contrast of the fiber microcracks.

[0037] See Figures 8-9The angle adjustment mounting mechanism 33 includes a mounting base 331, a rotating frame 332, a first positioning bolt 333, and an angle scale 334. The mounting base 331 is mounted on the mounting slide 22, the rotating frame 332 is hinged to the mounting base 331 via a rotating shaft, the first positioning bolt 333 is coaxially threaded to the mounting base 331, and the angle scale 334 is mounted on the rotating frame 332. When the angle between the mounting base 331 and the rotating frame 332 is adjusted, the angle between the mounting base 331 and the rotating frame 332 can be locked by rotating the first positioning bolt 333.

[0038] It should be noted that when adjusting the pitch angle of the light source, first loosen the first positioning bolt 333, rotate the rotating bracket 332 so that it rotates around the hinge axis relative to the mounting base 331, read the current pitch angle value through the angle scale 334, adjust to the target angle, tighten the first positioning bolt 333 to lock the relative angle between the mounting base 331 and the rotating bracket 332, and complete the pitch angle adjustment of the annular diffuse reflection light source 31 and the side guide light strip 32.

[0039] The adjustable structure of the hinged rotating frame 332 and the angle scale 334 allows for stepless and precise adjustment of the light source's tilt angle, adapting to corrugated boxes of different flute shapes and thicknesses, and ensuring that the supplementary lighting angle between the layers is always within the optimal range.

[0040] See Figures 8-9 The mounting base 331 is provided with a slide groove, the length direction of which is perpendicular to the paper box conveying direction; the mounting base 331 is provided with a second positioning bolt, one end of which passes through the slide groove and is threaded into the mounting slide 22.

[0041] It should be noted that when adjusting the horizontal position of the light source, first loosen the second positioning bolt, push the mounting base 331 to move along the slide groove relative to the mounting slide 22, adjust the horizontal distance between the annular diffuse reflection light source 31 and the crease section, and after adjusting to the appropriate position, tighten the second positioning bolt so that the end of the second positioning bolt abuts against the mounting slide 22, and lock the horizontal position of the mounting base 331.

[0042] The distance between the light source and the detection surface can be flexibly adjusted by the sliding adjustment structure of the slide and the second positioning bolt, which can adapt to the detection needs of folded covers of different widths and ensure uniform illumination in the effective detection area.

[0043] See Figures 1-2 and Figure 10The carton sealing machine 1 is equipped with a bending angle triggering mechanism 4; the bending angle triggering mechanism 4 includes an encoder 41, a positioning photoelectric switch 42, a sensing baffle 43, and a slotted photoelectric switch 44; the encoder 41 is coaxially connected to the rotating shaft of the follower roller 242; the positioning photoelectric switch 42 is set on the carton sealing machine 1; the sensing baffle 43 is set on the mounting slide 22, and the slotted photoelectric switch 44 is set on one side of the first mounting bracket 211; the detection slot opening of the slotted photoelectric switch 44 faces the movement direction of the mounting slide 22 and is aligned with the movement path of the sensing baffle 43.

[0044] It should be noted that when the front end of the cardboard box enters the detection station, the positioning photoelectric switch 42 detects that the cardboard box is in place and triggers the counting start reference; when the follower roller 242 rotates, it drives the coaxial encoder 41 to rotate synchronously and outputs a pulse signal to calculate the travel distance of the cardboard box, which is combined with the fixed tilt parameter of the folding guide rod to map the real-time bending angle of the folding cover; when the mounting slide 22 needs to return to the initial position, the sensing baffle 43 is inserted into the detection slot of the slotted photoelectric switch 44 to trigger the reset reference signal and calibrate the position zero point of each round of detection.

[0045] By using the encoder 41 for distance detection, combined with the positioning photoelectric switch 42 and the slotted photoelectric switch 44 for reference calibration, the travel distance of the carton can be mapped to the bending angle of the fold, achieving precise triggering of the critical bending range; it can effectively eliminate accumulated errors and ensure the repeatability accuracy of the trigger position; in conjunction with the imaging acquisition mechanism 23 and the supplementary lighting mechanism 3, imaging and supplementary lighting can be precisely activated within the critical range of crease deformation.

[0046] See Figures 1-2 and Figure 10 The bending angle triggering mechanism 4 also includes a controller mounted on the sealing machine 1; the encoder 41, the positioning photoelectric switch 42, the slotted photoelectric switch 44, the annular diffuse reflection light source 31, and the fixed-focus lens 232 are all connected to the controller via signal control; it is understood that the encoder 41, the positioning photoelectric switch 42, the slotted photoelectric switch 44, the annular diffuse reflection light source 31, the fixed-focus lens 232, and the controller are all existing technologies and will not be described in detail.

[0047] It should be noted that after the controller receives the position signal from the photoelectric switch 42, it starts the pulse counting of the encoder 41 to calculate the travel distance and corresponding bending angle of the cardboard box in real time. When the distance reaches the preset starting threshold, that is, when the cardboard box is bent at a certain angle (which may cause a hidden crack), the controller outputs a control signal to light up the ring diffuse reflection light source 31 and start the industrial camera 231 to continuously acquire images. When the distance reaches the ending threshold, the controller outputs a stop signal to turn off the ring diffuse reflection light source 31 and the industrial camera 231. When the slotted photoelectric switch 44 detects the reset position signal, the controller completes the benchmark calibration, resets the counting parameters, and waits for the next cardboard box to enter the station.

[0048] By coordinating the timing actions of various components through the controller, the entire inspection process can be automated. The triggering and synchronization accuracy is high, which can perfectly match the operating rhythm of high-speed box sealing production lines and complete continuous inspection without manual intervention.

[0049] Example 2: The technical solution of this example differs from that of Example 1 in that: (See below) Figures 1-10 A smart visual inspection and control system based on cardboard box production is disclosed, employing the aforementioned smart visual inspection device based on cardboard box production. Specifically, it includes an image processing module and a motion control module. Both the image processing module and the motion control module are connected to the controller via signal control. The image processing module receives and processes image data collected by the imaging acquisition mechanism 23. The motion control module provides data support for the synchronous movement of the imaging acquisition mechanism 23 and the position and angle adjustment of the supplementary lighting mechanism 3.

[0050] It should be noted that the motion control module outputs adjustment commands based on the cardboard box specifications, providing data support for the position and angle adjustment of the imaging acquisition mechanism 23 and the supplementary lighting mechanism 3, adapting to the detection requirements of different box types; the image data acquired by the industrial camera 231 is transmitted to the image processing module, which performs preprocessing and defect identification on the image, extracts the fiber structure features of the crease cross section, determines whether there are hidden cracks in the inner layer and classifies the defect level, and feeds back the identification results to the controller. The controller outputs corresponding control commands based on the defect level to drive downstream rejection or process adjustment actions.

[0051] Through the collaborative architecture of the image processing module and the motion control module, intelligent identification and adaptive adjustment of the detection mechanism for hidden cracks in the inner fiber layer of creases can be achieved, breaking through the limitation of traditional visual inspection that can only identify surface defects, and accurately identifying hidden fatigue defects that cannot be detected by static inspection.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent visual inspection device based on cardboard box production, comprising a carton sealing machine (1), characterized in that: A side-view imaging mechanism (2) is provided on one side of the sealing machine (1); the side-view imaging mechanism (2) includes: A linear slide module (21) is installed on one side of the carton sealing machine (1); The imaging acquisition mechanism (23) is mounted on the linear slide module (21) via a mounting slide (22); the imaging acquisition mechanism (23) includes an industrial camera (231) set on one side of the carton sealing machine (1) and a fixed-focus lens (232) set on the industrial camera (231), the fixed-focus lens (232) being set facing the side of the carton conveyor; And a follow-up transmission mechanism (24) is provided on the linear slide module (21); when the carton is conveyed by the carton sealing machine (1), the follow-up transmission mechanism (24) is allowed to drive the imaging acquisition mechanism (23) to move synchronously; when the carton is sealed by the carton sealing machine (1), the follow-up transmission mechanism (24) is allowed to drive the imaging acquisition mechanism (23) to move in the opposite direction and reset.

2. The intelligent visual inspection device based on cardboard box production according to claim 1, characterized in that: The linear slide module (21) includes a first mounting frame (211), a pair of first slide rails (212), and a slider (213); the first mounting frame (211) is fixed to the carton sealing machine (1), and the length direction of the first mounting frame (211) is parallel to the carton conveying direction; the pair of first slide rails (212) are disposed on the first mounting frame (211), and the slider (213) is slidably connected to the first slide rails (212); the mounting slide (22) is fixed to the slider (213).

3. The intelligent visual inspection device for cardboard box production according to claim 2, characterized in that: The follower transmission mechanism (24) includes a mounting plate (241), a follower roller (242), a first belt (244), a second belt (246), a connecting plate (247), a reset mechanism (248), a pair of first pulleys (243), and a second pulley (245). The mounting plate (241) is fixed to the first mounting bracket (211), and the follower roller (242) is rotatably connected to the mounting plate (241) around its axis. The outer circumferential surface of the follower roller (242) is provided with an adhesive layer. When the carton is conveyed to the position of the follower roller (242), the side wall of the carton abuts against the adhesive layer of the follower roller (242), allowing the follower roller (242) to rotate around its axis. The pair of first pulleys (243) are rotatably connected to the mounting plate (241) around its axis. Plate (241), one of the first pulleys (243) is coaxially connected to the follower roller (242); the first belt (244) is tensioned on a pair of first pulleys (243); a pair of second pulleys (245) are rotatably connected to the first mounting frame (211) around their axis, the second belt (246) is tensioned on a pair of second pulleys (245), and one of the first pulleys (243) and one of the second pulleys (245) are coaxially connected by a rotating shaft; one side of the second belt (246) is connected to the mounting slide (22) through a connecting plate (247); the reset mechanism (248) is set on the first mounting frame (211) and is used to drive the imaging acquisition mechanism (23) on the mounting slide (22) to move and then reset.

4. The intelligent visual inspection device based on cardboard box production according to claim 3, characterized in that: The reset mechanism (248) includes a connecting rope (2481), a second mounting frame (2482), a second slide rail (2483), a counterweight (2484), and a pulley (2485). The second mounting frame (2482) is fixed to the first mounting frame (211), the second slide rail (2483) is vertically arranged on the second mounting frame (2482), the counterweight (2484) is slidably connected to the second slide rail (2483), the pulley (2485) is arranged on the first mounting frame (211), one end of the connecting rope (2481) is connected to the second belt (246), and the other end of the connecting rope (2481) passes around the pulley (2485) and is connected to the counterweight (2484).

5. The intelligent visual inspection device for cardboard box production according to claim 1, characterized in that: A supplementary lighting mechanism (3) is provided on one side of the side-view imaging mechanism (2); the supplementary lighting mechanism (3) includes an annular diffuse reflection light source (31), a side guide light strip (32), and an angle adjustment mounting mechanism (33); the annular diffuse reflection light source (31) is provided on one side of the side-view imaging mechanism (2), and the side guide light strip (32) is provided in the mounting groove at the bottom of the annular diffuse reflection light source (31); the light-emitting end of the side guide light strip (32) is provided with a prism surface, and when the light emitted by the annular diffuse reflection light source (31) passes through the interior of the side guide light strip (32), it is allowed to be guided to the bending position of the cardboard box after refraction by the prism surface; the angle adjustment mounting mechanism (33) is provided on one side of the side-view imaging mechanism (2), and the annular diffuse reflection light source (31) is fixed to the angle adjustment mounting mechanism (33); the angle adjustment mounting mechanism (33) is used to adjust the angle at which the annular diffuse reflection light source (31) illuminates the cardboard box.

6. The intelligent visual inspection device for cardboard box production according to claim 5, characterized in that: The angle adjustment mounting mechanism (33) includes a mounting base (331), a rotating frame (332), a first positioning bolt (333), and an angle scale (334). The mounting base (331) is mounted on the mounting slide (22), the rotating frame (332) is hinged to the mounting base (331) via a rotating shaft, the first positioning bolt (333) is coaxially threaded to the mounting base (331), and the angle scale (334) is mounted on the rotating frame (332). When the angle between the mounting base (331) and the rotating frame (332) is adjusted, the angle between the mounting base (331) and the rotating frame (332) can be locked by rotating the first positioning bolt (333).

7. The intelligent visual inspection device for cardboard box production according to claim 6, characterized in that: The mounting base (331) is provided with a sliding groove, the length direction of which is perpendicular to the paper box conveying direction; the mounting base (331) is provided with a second positioning bolt, one end of which passes through the sliding groove and is threaded into the mounting slide (22).

8. The intelligent visual inspection device for cardboard box production according to claim 2, characterized in that: The carton sealing machine (1) is provided with a bending angle triggering mechanism (4); the bending angle triggering mechanism (4) includes an encoder (41), a positioning photoelectric switch (42), a sensing baffle (43), and a slotted photoelectric switch (44); the encoder (41) is coaxially connected to the rotating shaft of the follower roller (242); the positioning photoelectric switch (42) is provided on the carton sealing machine (1); the sensing baffle (43) is provided on the mounting slide (22), and the slotted photoelectric switch (44) is provided on one side of the first mounting frame (211); the detection slot opening of the slotted photoelectric switch (44) faces the movement direction of the mounting slide (22) and is aligned with the movement path of the sensing baffle (43).

9. The intelligent visual inspection device for cardboard box production according to claim 8, characterized in that: The bending angle triggering mechanism (4) also includes a controller installed on the carton sealing machine (1); the encoder (41), the position photoelectric switch (42), the slotted photoelectric switch (44), the ring diffuse reflection light source (31), and the fixed-focus lens (232) are all connected to the controller via signal control.

10. An intelligent visual inspection and control system based on cardboard box production, characterized in that: The intelligent visual inspection device based on paper box production as described in claim 9 is adopted; specifically, it includes an image processing module and a motion control module; both the image processing module and the motion control module are connected to the controller via signal control; the image processing module receives and processes the image data collected by the imaging acquisition mechanism (23); the motion control module is used to provide data support for the synchronous movement of the imaging acquisition mechanism (23) and the position and angle adjustment of the supplementary lighting mechanism (3).

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