A visual imaging strip box glue point detection device

Abstract

The utility model is suitable for the field of automation detection technology, provides a kind of visual imaging strip box glue point detection device, including rack, distributing mechanism, conveying mechanism, imaging detection mechanism;The rack is fixedly connected with conveying mechanism for conveying strip box, distributing mechanism, imaging detection mechanism and turnover mechanism are sequentially provided along the conveying direction of the conveying mechanism;The distributing mechanism is arranged at the input end of the conveying mechanism, and the strip box is sorted and sent into the conveying mechanism;The imaging detection mechanism is erected above the conveying mechanism, and the image of at least two surfaces of the strip box in the conveying process is collected to detect glue point quality;The turnover mechanism is arranged at the output end of the conveying mechanism, and the unqualified strip box is turned over and rejected according to the detection result.The utility model solves the problems of low efficiency, high rate of missed detection in manual detection in the existing strip box glue point detection, and poor adaptability and single detection surface of traditional machine vision system.

Description

Technical Field

[0001] This utility model applies to the field of automated inspection technology, and in particular relates to a visual imaging strip box adhesive dot detection device. Background Technology

[0002] In the production of carton packaging, the quality of adhesive application directly affects the sealing performance, structural strength, and appearance quality of the carton, making it a crucial step in ensuring the overall stability of product quality. Currently, the industry primarily relies on manual, timed sampling for adhesive dot quality inspection. This method is not only inefficient and has limited coverage, making real-time monitoring difficult, but it is also highly susceptible to missed or misjudged inspections due to subjective judgment differences and visual fatigue among operators. This poses a significant risk of quality control failure and fails to meet the stability and consistency requirements of modern high-speed production lines.

[0003] Although some companies have attempted to introduce traditional machine vision inspection systems to improve automation, existing devices still have significant shortcomings. First, traditional vision systems typically require cumbersome parameter settings and programming for specific carton specifications and glue dot layouts. When product models change or glue dot positions shift, the inspection program must be reconfigured, resulting in poor adaptability, long adjustment cycles, and difficulty in meeting the flexible production needs of multiple varieties and small batches. Second, most systems can only inspect a single surface of the carton, failing to comprehensively cover the top, bottom, and multiple sides of the glue dot status, leading to blind spots in inspection.

[0004] In order to solve the above-mentioned technical problems, this utility model designs a visual imaging strip box adhesive dot detection device. Utility Model Content

[0005] This utility model provides a visual imaging device for detecting adhesive dots on carton packaging, aiming to solve the problems of low efficiency and high missed detection rate of manual inspection in existing carton adhesive dot detection, as well as the poor adaptability and limited inspection surface of traditional machine vision systems. The technical solution is as follows: A visual imaging strip box adhesive dot detection device includes a frame, a dispensing mechanism, a conveying mechanism, and an imaging detection mechanism; the frame is fixedly connected to a conveying mechanism for conveying strip boxes, and the dispensing mechanism, the imaging detection mechanism, and the flipping mechanism are arranged sequentially along the conveying direction of the conveying mechanism; The sorting mechanism is located at the input end of the conveying mechanism to sort and send the strip boxes into the conveying mechanism; the imaging detection mechanism is mounted above the conveying mechanism to collect images of at least two surfaces of the strip boxes during the conveying process to detect the glue dot quality; the flipping mechanism is located at the output end of the conveying mechanism to flip and remove unqualified strip boxes according to the detection results.

[0006] Based on the above technical solution, the material distribution mechanism includes a material distribution platform, a material distribution brush, and a reflector; the material distribution platform is fixed on the frame and located in front of the input end of the conveying mechanism; the material distribution brush is installed on the material distribution platform, and its brush body extends downward and presses against the surface of the strip box to create obstruction; the reflector is installed on the material distribution platform to reflect the back structure of the strip box.

[0007] Preferably, the material distribution platform is further provided with an upwardly protruding baffle plate, which is located to the side of the material distribution brush.

[0008] Preferably, the imaging detection mechanism includes an imaging bracket, a first camera, a second camera, and a third camera; the imaging bracket is fixed to the frame and spans the conveying mechanism; the first camera is vertically downward mounted on the imaging bracket to capture images of the top surface of the carton; the second and third cameras are mounted on the imaging bracket to capture images of the front, back, left, and right sides of the carton, respectively.

[0009] Preferably, the imaging detection mechanism further includes a first fill light and a second fill light; the first fill light is set to the viewfinder area of ​​the second camera to provide illumination for the front and back of the strip box; the second fill light is set to the viewfinder area of ​​the third camera to provide illumination for the left and right sides of the strip box.

[0010] Beneficial effects Compared with the prior art, the beneficial effects of this utility model are: 1. This device, by setting up multi-angle cameras (top, front / back, left / right) above the conveyor line and combining them with the imaging mechanism at the bottom, can simultaneously acquire images of the five main surfaces of the strip box, realizing all-round detection of the position, quantity, and shape of the glue dots. It completely eliminates the blind spots existing in traditional manual or single-sided visual inspection, greatly reduces the missed detection rate, and ensures the consistency of product quality.

[0011] 2. The material sorting mechanism adopts a collaborative design of material sorting brush and reflector. While realizing the orderly individual conveying of strip boxes, the reflector uses the reflector to reflect the back structure of the strip box in advance, supporting non-contact pre-inspection. The back information can be obtained without flipping, avoiding complex mechanical actions and improving the detection cycle and the stability of system operation.

[0012] 3. The flipping mechanism and vision system are intelligently linked. Based on the detection results, the flipping cylinder is automatically controlled to reliably flip and remove unqualified strips, while qualified products pass through smoothly. In conjunction with the front and rear auxiliary conveying mechanisms, the production line is guaranteed to operate continuously, improving production efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0014] Figure 1 : A schematic diagram of the structure of this utility model; Figure 2 : A schematic diagram of the material distribution mechanism described in this utility model; Figure 3 : A schematic diagram of the structure of the material removal and dispensing mechanism and the imaging detection mechanism of this utility model; Figure 4 : A schematic diagram of the imaging detection mechanism described in this utility model; Figure 5 The imaging detection mechanism of this utility model removes the bottom view of the camera; Figure 6 : A schematic diagram of the bottom imaging mechanism described in this utility model; Figure 7 : A schematic diagram of the structure of the flipping mechanism described in this utility model; Figure 8 : A schematic diagram of the cover plate structure described in this utility model; Figure 9 : A schematic diagram of the connection of the cover plate described in this utility model; Figure 10 : A schematic diagram of the position of the auxiliary conveying mechanism described in this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and examples: The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] like Figure 1 , 3 As shown in Figure 10, a visual imaging strip box adhesive dot detection device includes a frame 1, a material distribution mechanism 2, a conveying mechanism 3, and an imaging detection mechanism 4; the frame 1 is fixedly connected to the conveying mechanism 3 for conveying strip boxes 9, and the material distribution mechanism 2, the imaging detection mechanism 4, and the flipping mechanism 5 are arranged sequentially along the conveying direction of the conveying mechanism 3. like Figure 2 As shown, the sorting mechanism 2 is located at the input end of the conveying mechanism 3, and sorts the carton 9 and sends it into the conveying mechanism 3; Specifically, the material distribution mechanism 2 includes a material distribution platform 21, a material distribution brush 22, and a reflector 23; the material distribution platform 21 is fixed on the frame 1 and located in front of the input end of the conveying mechanism 3; the material distribution brush 22 is installed on the material distribution platform 21, and its brush body extends downward and presses against the surface of the strip box 9 to create obstruction.

[0019] The brush body of the material distribution brush 22 presses downwards against the surface of the strip box 9, using the friction of the bristles to create a flexible barrier. As one strip box 9 is carried away by the conveyor mechanism 3, the resistance of the brush prevents subsequent strip boxes from continuously entering, thus achieving the material distribution function. Simultaneously, multiple strip boxes 9 can be temporarily stored in sequence in front of the brush, acting as a buffer to adapt to the rhythm of continuous feeding in the preceding process and intermittent operation in the subsequent inspection process, improving the stability of the system operation. The reflector 23 is mounted on the sorting table 21 and is used to reflect the back structure of the strip box 9. Before the strip box 9 enters the main imaging detection area, the back image can be reflected by the reflector 23, allowing manual identification of the adhesive dots on the back of the strip box in advance. The back image of the strip box reflected by the reflector can be transmitted to the control system in real time. On the one hand, this assists manual inspection in identifying obvious defects in advance, and on the other hand, it provides a basis for pre-adjustment of the back adhesive dot detection parameters (such as exposure and focal length) of the subsequent imaging detection mechanism, further improving the efficiency and accuracy of the formal inspection.

[0020] A push rod is provided at the preceding station of the sorting table 21. The push rod pushes the strip boxes 9 output from the preceding process to the sorting mechanism 2 in sequence. The sorting brush 22 is located above the sorting table 21. Its bristles press against the surface of the strip box 9, and the friction force prevents the strip box 9 from moving forward, so as to achieve temporary storage and positioning. When the subsequent strip box 9 is pushed by the push rod and abuts against the previous strip box 9, the resulting thrust overcomes the pressing force of the sorting brush 22 and pushes the previous strip box 9 into the conveying mechanism 3, thereby realizing the orderly and intermittent feeding of individual strip boxes and ensuring that the conveying mechanism 3 stably receives and conveys the strip boxes.

[0021] The dispensing platform 21 is also equipped with an upwardly protruding baffle 24, which is located to the side of the dispensing brush 22 to prevent the strip box 9 from falling off. During the process of the push rod pushing the strip box into the dispensing platform, or due to uneven clamping force applied by the dispensing brush 22, the strip box 9 may slide laterally or tilt. The baffle 24 protrudes upward from the surface of the dispensing platform, forming a physical limit.

[0022] like Figure 4 As shown, the imaging detection mechanism 4 is mounted above the conveying mechanism 3 and performs image acquisition on at least two surfaces of the strip box 9 during the conveying process to detect the quality of the adhesive dots. Specifically, the imaging detection mechanism 4 includes an imaging support 41, a first camera 42, a second camera 43, and a third camera 44; the imaging support 41 is fixed to the frame 1 and spans the conveying mechanism 3; the first camera 42 is vertically downward mounted on the imaging support 41 to capture images of the top surface of the strip box 9; the second camera 43 and the third camera 44 are mounted on the imaging support 41 to capture images of the front, back, left, and right sides of the strip box 9, respectively.

[0023] like Figure 5 As shown, by setting a first camera 42 above the conveying mechanism 3 to capture the top surface, a second camera 43 to capture the front and back surfaces, a third camera 44 to capture the left and right surfaces, and a fourth camera 62 below to capture the bottom surface, image acquisition of five key surfaces (top, front, back, left, right, and bottom) of the six outer surfaces of the strip box is achieved (where the front / back and left / right surfaces can be captured by a single camera or a dual-view perspective). This multi-camera three-dimensional layout ensures that the integrity, position, quantity, and shape of the adhesive dots on each adhesive surface can be detected, completely solving the problem of missed detection in traditional single-sided inspection and significantly improving the comprehensiveness and reliability of the inspection.

[0024] The imaging detection mechanism 4 also includes a first supplementary light 45 and a second supplementary light 46. The first supplementary light 45 is positioned in the viewfinder area of ​​the second camera 43 to provide illumination for the front and rear of the strip box 9. The second supplementary light 46 is positioned in the viewfinder area of ​​the third camera 44 to provide illumination for the left and right sides of the strip box 9. The first supplementary light 45 provides uniform illumination specifically for front and rear detection, the second supplementary light 46 provides independent illumination for the left and right sides, and the bottom supplementary light 61 illuminates the bottom surface from below through transmission or diffusion. The use of zoned and directional supplementary lighting effectively avoids problems such as reflection, shadows, and uneven lighting, enabling the camera to acquire high-contrast, clear, and stable images under various operating conditions.

[0025] like Figure 6 As shown, it also includes a bottom imaging mechanism 6, which is located below the conveying mechanism 3. The bottom imaging mechanism 6 includes a bottom supplementary light 61 and a fourth camera 62. The fourth camera 62 is upward-facing and captures images of the bottom surface of the strip box 9 through the gaps or a transparent plate in the conveying mechanism 3. The bottom imaging mechanism 6 can complete the bottom surface detection without an additional flipping mechanism, simplifying the equipment structure and reducing the failure rate.

[0026] like Figure 7 As shown, the flipping mechanism 5 is located at the output end of the conveying mechanism 3, and flips and removes unqualified strip boxes 9 according to the detection results.

[0027] Specifically, the flipping mechanism 5 includes a flipping plate 53, a flipping plate rotating shaft 54, and a flipping cylinder 55; the flipping plate rotating shaft 54 ​​is mounted on the frame 1, the flipping plate 53 is fitted onto the flipping plate rotating shaft 54, and the plate surface of the flipping plate 53 is flush with the conveying surface of the conveying mechanism 3 in the initial position to receive the strip box 9; the cylinder body of the flipping cylinder 55 is hinged to the frame 1, and the free end of its piston rod is hinged to the flipping plate rotating shaft 54 ​​through a connecting block, for driving the flipping plate 53 to rotate around the flipping plate rotating shaft 54 ​​to achieve flipping.

[0028] The tilting plate 53 is fixed to the frame 1 via the tilting plate rotation shaft 54, forming a stable rotation fulcrum. The tilting cylinder 55 drives the rotation shaft through a hinge, realizing a four-bar or near-four-bar linkage transmission. Upon receiving a non-conforming signal from the detection system, the tilting action is completed promptly, ensuring real-time rejection response and adapting to the high-speed production line cycle time.

[0029] The upper surface of the tilting plate 53 is provided with multiple freely rotatable rollers 531 for low-friction conveying of qualified carton 9. When the tilting plate 53 is not in operation, its surface remains flush with the conveying surface of the conveying mechanism 3, forming a continuous, stepless transition surface. Qualified cartons can pass through smoothly.

[0030] When the inspection is deemed unqualified, the tilting cylinder 55 drives the tilting plate 53 to rotate around the axis (90° or greater), causing the strip box 9 to tilt from the conveyor line to the waste collection channel or rejection chute below.

[0031] like Figure 8 and Figure 9 As shown, the flipping mechanism 5 also includes a cover plate 51 and a flipping bracket 52; the flipping bracket 52 is fixed on the frame 1; the cover plate 51 is rotatably connected to the flipping bracket 52. The cover plate 51 is located above the flipping plate 53. When the defective carton rotates with the flipping plate 53, the cover plate plays a limiting and guiding role, preventing the carton from bouncing upward, sliding sideways or deviating from the predetermined trajectory due to inertia or center of gravity shift during the flipping process, ensuring that it falls stably into the waste collection channel.

[0032] Preferably, the cover plate 51 can be designed as an arc-shaped or inclined structure to match the movement trajectory of the flip plate 53.

[0033] In the preceding and following workstations of the flipping mechanism 5, the frame 1 is equipped with an auxiliary conveying mechanism 7 for conveying the strip box 9 to the next process.

[0034] It also includes a control system, which is connected to the conveying mechanism 3, the imaging detection mechanism 4, and the flipping mechanism 5. The control system includes a detection system, which consists of an industrial control computer (IPC) or an embedded vision controller, and runs image processing algorithms (such as edge detection, template matching, blob analysis, deep learning, etc.) to preprocess, extract features (glue dot location, area, shape, and quantity), and identify defects (missing, offset, broken glue, overflow, etc.) on the acquired multi-faceted images. This system is existing technology known to those skilled in the art, and therefore will not be described in detail here.

[0035] Both conveying mechanism 3 and auxiliary conveying mechanism 7 are belt conveying mechanisms, which include a driving roller, a driven roller, a tensioning device, a conveyor belt, and a drive motor. The conveyor belt is fitted between the driving roller and the driven roller. The drive motor drives the driving roller to rotate through a coupling or synchronous belt, thereby driving the conveyor belt to circulate and realize the continuous and stable conveying of the strip box 9.

[0036] In operation, the preceding process pushes the stacked carton 9 sequentially to the sorting table 21 via push rods. The bristles of the sorting brush 22 press against the surface of the carton 9, using friction to temporarily block the carton's advance and prevent multiple cartons from entering the conveying mechanism 3 simultaneously. When the subsequent carton 9 is pushed by the push rod and presses against the carton in front, the resulting thrust overcomes the resistance of the brushes, pushing the foremost carton 9 into the conveying mechanism 3.

[0037] The strip box 9 enters the belt conveyor mechanism 3 and is smoothly conveyed forward under the drive motor. The auxiliary conveyor mechanism 7 works in coordination with the front and rear ends to ensure the continuity of logistics.

[0038] As the carton passes through the imaging area, multiple cameras simultaneously or in shifts acquire images. Specifically, the first camera 42 shoots vertically downwards to obtain an image of the adhesive dots on the top surface. The second camera 43 shoots the front and back of the carton to detect adhesive dots on the front / rear sides. The third camera 44 shoots the adhesive dots on the left and right sides of the carton. The fourth camera 62 shoots an image of the adhesive dots on the bottom surface from below, through the gap in the conveyor belt or a transparent plate. When the carton passes through the imaging area, the conveyor mechanism 3 can stop moving for static imaging, or it can continue moving for imaging during motion. Sensors are integrated into the conveyor mechanism 3 to detect the position of the carton.

[0039] Each camera is equipped with a dedicated fill light to provide uniform illumination, ensuring clear images with high contrast and avoiding interference from reflections or shadows.

[0040] All images are transmitted to the detection system in real time, and the system analyzes the adhesive dots on each surface using image algorithms (such as edge detection, template matching, blob analysis, etc.).

[0041] When the carton reaches the flipping mechanism 5, the control system decides whether to reject it based on the detection results.

[0042] For qualified carton 9, the flipping mechanism 5 remains in its initial state, the flipping plate 53 is flush with the conveying surface, the carton passes through smoothly, and is sent to the next process by the rear auxiliary conveying mechanism; For defective cartons, the control system triggers the tilting cylinder 55, which pushes the tilting plate rotating shaft 54 ​​to rotate, causing the tilting plate 53 to tilt and tilt the carton to the waste channel below, thus achieving automatic rejection. After the tilting is completed, the cylinder resets, the tilting plate returns to horizontal, and it is ready for the next operation.

[0043] It should be noted that the control system, camera, fill light, and conveying mechanism in this embodiment are all general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0044] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A visual imaging strip box adhesive dot detection device, characterized in that: It includes a frame (1), a material distribution mechanism (2), a conveying mechanism (3), and an imaging detection mechanism (4); the frame (1) is fixedly connected to a conveying mechanism (3) for conveying strip boxes (9), and the material distribution mechanism (2), the imaging detection mechanism (4), and the flipping mechanism (5) are arranged sequentially along the conveying direction of the conveying mechanism (3); The sorting mechanism (2) is located at the input end of the conveying mechanism (3) to sort the strip boxes (9) and send them into the conveying mechanism (3); the imaging detection mechanism (4) is mounted above the conveying mechanism (3) to collect images of at least two surfaces of the strip boxes (9) during the conveying process to detect the quality of the glue dots; the flipping mechanism (5) is located at the output end of the conveying mechanism (3) to flip and remove unqualified strip boxes (9) according to the detection results.

2. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: The material distribution mechanism (2) includes a material distribution table (21), a material distribution brush (22), and a reflector (23); the material distribution table (21) is fixed on the frame (1) and located in front of the input end of the conveying mechanism (3); the material distribution brush (22) is installed on the material distribution table (21), and its brush body extends downward and presses against the surface of the strip box (9) to create a blockage; the reflector (23) is installed on the material distribution table (21) and is used to reflect the back structure of the strip box (9).

3. The visual imaging strip box adhesive dot detection device according to claim 2, characterized in that: The material distribution table (21) is also provided with an upwardly protruding baffle plate (24), which is located on the side of the material distribution brush (22).

4. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: The imaging detection mechanism (4) includes an imaging bracket (41), a first camera (42), a second camera (43), and a third camera (44); the imaging bracket (41) is fixed to the frame (1) and spans the conveying mechanism (3); the first camera (42) is vertically downward on the imaging bracket (41) and captures the top image of the strip box (9); the second camera (43) and the third camera (44) are mounted on the imaging bracket (41) and capture the front, back, left and right images of the strip box (9), respectively.

5. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: The imaging detection mechanism (4) further includes a first fill light (45) and a second fill light (46); the first fill light (45) is set in the viewfinder area of ​​the second camera (43) to provide illumination for the front and back of the bar box (9); the second fill light (46) is set in the viewfinder area of ​​the third camera (44) to provide illumination for the left and right sides of the bar box (9).

6. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: It also includes a bottom imaging mechanism (6), which is located below the conveying mechanism (3) and includes a bottom fill light (61) and a fourth camera (62). The fourth camera (62) is positioned upward and captures images of the bottom surface of the strip box (9) through the gap or transparent plate of the conveying mechanism (3).

7. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: The flipping mechanism (5) includes a flipping plate (53), a flipping plate rotating shaft (54), and a flipping cylinder (55). The flipping plate rotating shaft (54) is mounted on the frame (1), and the flipping plate (53) is fitted onto the flipping plate rotating shaft (54). The plate surface of the flipping plate (53) is flush with the conveying surface of the conveying mechanism (3) in the initial position to receive the strip box (9). The cylinder body of the flipping cylinder (55) is hinged to the frame (1), and the free end of its piston rod is hinged to the flipping plate rotating shaft (54) through a connecting block to drive the flipping plate (53) to rotate around the flipping plate rotating shaft (54) to achieve flipping.

8. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: The flipping mechanism (5) also includes a cover plate (51) and a flipping bracket (52); the flipping bracket (52) is fixed on the frame (1); the cover plate (51) is rotatably connected to the flipping bracket (52).

9. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: The upper surface of the flip plate (53) is provided with a plurality of freely rotating rollers (531).

10. The visual imaging strip box adhesive dot detection device according to claim 1, characterized in that: In the preceding and following workstations of the flipping mechanism (5), the frame (1) is provided with an auxiliary conveying mechanism (7) for conveying the strip box (9) to the next process.

Images