A paper bowl shape detection device
By combining a rotating tooling mechanism with dual industrial cameras, the problem of blind spots in paper bowl inspection devices has been solved, enabling full-dimensional shape inspection and reducing costs and space requirements.
Patent Information
- Application Number
- CN202522035198.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-22
AI Technical Summary
Existing paper bowl shape detection devices use a single-camera fixed shooting mode, which results in many blind spots and cannot fully cover the circumferential appearance of the paper bowl, leading to a high false negative rate and high cost.
The design employs a rotating tooling mechanism combined with a dual industrial camera system. The first camera is positioned on one side of the rotating disk to scan the sidewalls, while the second camera is positioned directly above the rotating disk to capture defects on the top surface and the inner bottom, enabling full-dimensional inspection of the paper bowl.
It enables full-dimensional shape inspection of paper bowls, avoiding missed inspections, while reducing equipment costs and space occupation.
Smart Images
Figure CN224682135U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of paper bowl detection technology, specifically a paper bowl shape detection device. Background Technology
[0002] Under the dual requirements of food packaging safety and user experience, burrs, dents, and bulges in paper bowls have become key factors affecting product qualification. From a safety perspective, burrs on the rim can easily cut fingers or lips when consumers handle or eat the bowl, and may even enter the body with food, posing a safety hazard. From a usage perspective, dents or bulges on the sidewalls or bottom affect the use of the paper bowl and make it more prone to breakage, requiring defective paper bowls to be screened out before packaging. Traditionally, manual visual inspection is used, requiring workers to observe and compare each paper bowl with a standard sample at the end of the production line. However, this method is greatly affected by subjective factors and is inefficient and costly. With the rapid development of machine vision inspection, machine vision is now being used to inspect the shape quality of paper bowls. However, current machine vision inspection uses a single-camera fixed shooting mode, which can only capture images of a single side or top of the paper bowl, failing to fully cover the circumferential appearance of the bowl. This results in many blind spots and a high rate of missed detection of defective products. Covering the entire circumference requires more cameras, which is costly and space-consuming. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a paper bowl shape detection device to address the deficiencies of the prior art.
[0004] The purpose of this utility model is achieved through the following technical solution: a paper bowl shape detection device, including a limiting conveyor belt and a detection component. The conveying end of the limiting conveyor belt is provided with a rotating tooling mechanism. The rotating tooling mechanism includes a rotating disk with its rotation axis vertically arranged. The top surface of the rotating disk is flush with the conveying surface of the limiting conveyor belt. A negative pressure chamber is provided inside the rotating disk, and a plurality of negative pressure holes are opened on the top surface of the rotating disk. The negative pressure holes are connected to the negative pressure chamber. The detection component includes a first industrial camera and a second industrial camera. The second industrial camera is arranged directly above the rotating disk, and the first industrial camera is arranged on one side of the rotating disk. The imaging paths of the first industrial camera and the second industrial camera are both oriented towards the rotating disk.
[0005] Furthermore, the rotating tooling mechanism also includes a U-shaped base with the U-shaped opening facing downwards. A rotating shaft is rotatably mounted on the U-shaped base, and the rotating shaft is vertically positioned. The rotating disk is concentrically fixed at the top end of the rotating shaft.
[0006] Furthermore, a motor is installed on the top of the U-shaped base, and the output shaft of the motor passes through the U-shaped opening of the U-shaped base and is connected to a small gear. A large gear is fixedly mounted on the rotating shaft, and the large gear meshes with the small gear.
[0007] Furthermore, the rotating shaft is hollow, and a negative pressure hole is opened at the bottom of the rotating disk. One end of the negative pressure hole is connected to the negative pressure chamber, and the other end is connected to the inner hole of the rotating shaft. A negative pressure tube is movably inserted through the bottom of the rotating shaft. A horizontal plate is fixedly sleeved on the negative pressure tube. The horizontal plate is connected to the U-shaped base by screws. The end of the negative pressure tube away from the rotating shaft is connected to a vacuum pump through a negative pressure hose.
[0008] Furthermore, the side wall of the negative pressure pipe is provided with an annular groove, and a sealing ring is assembled in the annular groove, the sealing ring being interference-fitted into the rotating shaft.
[0009] Furthermore, two limiting rods are spaced apart above the limiting conveyor belt, forming a limiting conveying space between the two limiting rods, and one end of each limiting rod is connected to the conveyor frame of the limiting conveyor belt via a connecting rod.
[0010] Furthermore, a U-shaped limiting component is provided at the end of the rotating disk away from the limiting conveyor belt, with the U-shaped opening of the U-shaped limiting component facing the limiting conveyor belt. The end of the U-shaped limiting component away from the rotating disk is connected to the telescopic shaft of the pushing cylinder, and the cylinder body of the pushing cylinder is horizontally fixed.
[0011] Furthermore, the limiting rod has several through holes along its length, and the conveyor frame of the limiting conveyor belt has threaded holes, with the screw passing through one of the through holes and threadedly connected to the threaded hole.
[0012] The beneficial effects of this utility model are: By employing a collaborative design of a rotating fixture mechanism and dual industrial cameras, the core defect of "blind spots in fixed single-camera shooting" in existing machine vision inspection is completely solved. On one hand, the second industrial camera, positioned directly above the rotating disk, accurately captures defects such as concavities, convexities, and burrs on the top and bottom surfaces of the paper bowl, avoiding the missed detections caused by the traditional single-view top view. On the other hand, the first industrial camera, positioned to one side of the rotating disk, works in conjunction with the disk's 360° uniform rotation to perform a complete scan of the paper bowl's circumferential sidewalls. Whether it's localized concavities or convexities on the sidewalls, or minute burrs on the inner side of the bowl's rim, all can be accurately identified through continuous imaging. Compared to existing single-camera inspection solutions, this device eliminates the need for additional cameras. The combination of rotation and dual-viewpoints enables full-dimensional shape inspection of the paper bowl, avoiding both the high cost and large space requirements of multi-camera solutions and the problem of missed detections. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of a paper bowl shape detection device according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a paper bowl shape detection device according to the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the rotating disk in a paper bowl shape detection device of this utility model; In the diagram, 1-limiting conveyor belt, 2-rotating disc, 3-negative pressure chamber, 4-negative pressure hole, 5-first industrial camera, 6-second industrial camera, 7-U-shaped base, 8-rotating shaft, 9-motor, 10-small gear, 11-large gear, 12-negative pressure opening, 13-negative pressure pipe, 14-horizontal plate, 15-sealing ring, 16-limiting rod, 17-connecting rod, 18-U-shaped limiting component, 19-pushing cylinder, 20-through hole, 21-screw. Detailed Implementation
[0014] Example 1 like Figures 1 to 3As shown, a paper bowl shape detection device includes a limiting conveyor belt 1 and a detection component. A rotating fixture mechanism is provided at the conveying end of the limiting conveyor belt 1. The rotating fixture mechanism includes a rotating disk 2, whose rotation axis is vertically arranged. The top surface of the rotating disk 2 is flush with the conveying surface of the limiting conveyor belt 1. A negative pressure chamber 3 is provided inside the rotating disk 2, and several negative pressure holes 4 are opened on the top surface of the rotating disk 2, communicating with the negative pressure chamber 3. The detection component includes a first industrial camera 5 and a second industrial camera 6. The second industrial camera 6 is arranged directly above the rotating disk 2, and the first industrial camera 5 is arranged on one side of the rotating disk 2. The imaging paths of both the first industrial camera 5 and the second industrial camera 6 face the rotating disk 2. The detection component also... The device includes a support frame, on which both the first industrial camera 5 and the second industrial camera 6 are mounted. A limiting conveyor belt 1 transports the paper bowl to be inspected onto a rotating disk 2, with the bowl opening upwards. Once on the rotating disk 2, the disk generates negative pressure to hold the bowl in place, preventing it from detaching. The second industrial camera 6 captures defects such as depressions, bulges, and burrs on the top and bottom surfaces and the rim, avoiding the missed defects found in traditional single-view top-surface inspections. Simultaneously, the rotating disk 2 slowly rotates the bowl, allowing the first industrial camera 5 to perform a complete scan of the bowl's circumferential sidewalls. Whether it's localized depressions or bulges on the sidewalls, or even minute burrs on the inner side of the rim, all can be accurately identified through continuous imaging. Compared to existing single-camera inspection solutions, this device eliminates the need for additional cameras. By combining rotation and dual-view technology, it achieves full-dimensional shape inspection of the paper bowl, avoiding the high cost and large space requirements of multi-camera solutions while preventing missed defects. A robotic arm is positioned on the side of the rotating disk 2 furthest from the detection components. Based on the detection results, the robotic arm distributes the paper bowls to different areas. In practice, visual imaging utilizes existing technology. The first industrial camera 5 is a Keyence LJ-V7000. This series of cameras boasts a high resolution of over 2 megapixels, ensuring clear imaging of minute burrs ≥0.3mm in length, dents ≥0.2mm in depth, and protrusions ≥0.2mm in height. In terms of frame rate, it can reach a maximum of over 100 frames per second. Combined with the rotating disk's maximum rotation speed of 60 revolutions per minute, it enables continuous and stable image acquisition during the rapid rotation of the paper bowl, preventing missed images of defective areas due to shooting delays. The second industrial camera 6 is a Hikvision MV-CA050-10GC, effectively handling defect detection on the top surface and inner bottom of the paper bowl. Its ultra-high resolution of 5 megapixels enables ultra-fine imaging of burrs on the edge of the bowl, easily identifying burrs with a length of 0.3mm or more. It also accurately captures concave and convex defects on the top and inner bottom surfaces, with a measurement accuracy within 0.1mm. The camera supports a gigabit Ethernet interface, ensuring fast and stable data transmission and enabling rapid real-time imaging to meet the high-speed inspection pace of production lines.In addition, it has a wealth of camera parameter adjustment functions, which can flexibly adjust parameters such as exposure time and gain according to different materials and colors of paper bowls, ensuring that clear and accurate images can be obtained under various working conditions, effectively avoiding the problem of missed detection in top surface inspection.
[0015] Example 2 Based on Example 1, such as Figure 1 As shown, two limiting rods 16 are spaced apart above the limiting conveyor belt 1, forming a limiting conveying space between the two limiting rods 16. One end of the limiting rod 16 is connected to the conveyor frame of the limiting conveyor belt 1 through a connecting rod 17. The paper bowl is limited and conveyed by the two limiting rods 16, so that the paper bowl can be smoothly conveyed to the rotating disk 2.
[0016] Furthermore, the limiting rod 16 has several through holes 20 extending along its length, and the conveyor frame of the limiting conveyor belt 1 has threaded holes. The screw 21 passes through one of the through holes 20 and is threaded into the threaded hole. The screw 21 passes through different through holes 20 and is connected to the conveyor frame, which can adjust the distance between the two limiting rods 16 to adapt to the conveying of paper bowls of different sizes.
[0017] Example 3 Based on Example 2, such as Figure 1 and Figure 2 As shown, a U-shaped limiting member 18 is provided at the end of the rotating disk 2 away from the limiting conveyor belt 1. The U-shaped opening of the U-shaped limiting member 18 faces the limiting conveyor belt 1. The end of the U-shaped limiting member 18 away from the rotating disk 2 is connected to the telescopic shaft of the push cylinder 19. The cylinder body of the push cylinder 19 is horizontally fixed. By pushing the cylinder 19, the U-shaped limiting member 18 is moved closer to the rotating disk 2, so that the rotating disk 2 is located inside the U-shaped opening of the U-shaped limiting member 18, and the U-shaped limiting member 18 is connected to the conveying end of the limiting conveyor belt 1, ensuring that the paper... The paper bowl smoothly enters the rotating disk 2. When the rotating disk 2 adsorbs the paper bowl under negative pressure, it pushes the cylinder 19 to move the U-shaped limiting member 18 away from the limiting conveyor belt 1, so that the rotating disk 2 is separated from the U-shaped opening of the U-shaped limiting member 18, and the paper bowl is exposed. This allows the first industrial camera 5 and the second industrial camera 6 to smoothly perform quality inspection on the paper bowl. After the inspection is completed, the paper bowl is unloaded. After unloading, the U-shaped limiting member 18 moves again to limit the next paper bowl. This process is repeated to complete the cyclic inspection of the paper bowl.
[0018] Example 4 Based on Embodiment 3, the rotating fixture mechanism also includes a U-shaped base 7, with the U-shaped opening of the U-shaped base 7 facing downwards. A rotating shaft 8 is rotatably mounted on the U-shaped base 7, and the rotating shaft 8 is vertically positioned. The rotating disk 2 is concentrically fixed at the top of the rotating shaft 8. A motor 9 is mounted on the top of the U-shaped base 7, and the output shaft of the motor 9 passes through the U-shaped opening of the U-shaped base 7 and is connected to a small gear 10. A large gear 11 is fixedly mounted on the rotating shaft 8, and the large gear 11 meshes with the small gear 10. The motor 9 drives the small gear 10 to rotate, and the meshing of the small gear 10 with the large gear 11 drives the rotating shaft 8 to rotate, thereby causing the rotating shaft 8 to drive the rotating disk 2 to rotate, completing the coverage inspection of the paper bowl sidewall.
[0019] Example 5 Based on Example 4, such as Figures 1 to 3 As shown, the rotating shaft 8 is hollow, and the bottom of the rotating disk 2 has a negative pressure opening 12. One end of the negative pressure opening 12 is connected to the negative pressure chamber 3, and the other end is connected to the inner hole of the rotating shaft 8. A negative pressure tube 13 is movably inserted through the bottom of the rotating shaft 8. A horizontal plate 14 is fixedly sleeved on the negative pressure tube 13. The horizontal plate 14 is connected to the U-shaped base 7 by screws. The end of the negative pressure tube 13 away from the rotating shaft 8 is connected to the vacuum pump through a negative pressure hose. The negative pressure tube 13 is coaxially arranged with the rotating shaft 8, which can adsorb the paper bowl with negative pressure while the rotating disk 2 can smoothly drive the paper bowl to rotate for quality inspection. The vacuum pump generates negative pressure in the negative pressure chamber 3, and the negative pressure acts on the paper bowl through the negative pressure hole 4 to complete the tooling of the paper bowl.
[0020] Furthermore, an annular groove is provided on the side wall of the negative pressure pipe 13, and a sealing ring 15 is installed in the annular groove. The sealing ring 15 is interference-fitted into the rotating shaft 8. The sealing ring 15 seals the gap between the negative pressure pipe 13 and the rotating shaft 8, ensuring the stability of the negative pressure. At the same time, it allows the rotating shaft 8 and the negative pressure pipe 13 to have rotational freedom, without affecting the normal rotation of the rotating shaft 8.
Claims
1. A paper bowl shape detection device, characterized in that, The device includes a limiting conveyor belt (1) and a detection component. The conveying end of the limiting conveyor belt (1) is provided with a rotating tooling mechanism. The rotating tooling mechanism includes a rotating disk (2). The rotation axis of the rotating disk (2) is vertically arranged. The top surface of the rotating disk (2) is flush with the conveying surface of the limiting conveyor belt (1). The rotating disk (2) is provided with a negative pressure chamber (3). The top surface of the rotating disk (2) is provided with several negative pressure holes (4). The negative pressure holes (4) are connected to the negative pressure chamber (3). The detection component includes a first industrial camera (5) and a second industrial camera (6). The second industrial camera (6) is arranged directly above the rotating disk (2). The first industrial camera (5) is arranged on one side of the rotating disk (2). The imaging paths of the first industrial camera (5) and the second industrial camera (6) are both oriented towards the rotating disk (2).
2. The paper bowl shape detection device according to claim 1, characterized in that, The rotating tooling mechanism also includes a U-shaped base (7), with the U-shaped opening of the U-shaped base (7) facing downwards. A rotating shaft (8) is rotatably mounted on the U-shaped base (7), with the rotating shaft (8) being vertically mounted. The rotating disk (2) is concentrically fixed at the top of the rotating shaft (8).
3. The paper bowl shape detection device according to claim 2, characterized in that, A motor (9) is installed on the top of the U-shaped base (7). The output shaft of the motor (9) passes through the U-shaped opening of the U-shaped base (7) and is connected to a small gear (10). A large gear (11) is fixedly mounted on the rotating shaft (8). The large gear (11) meshes with the small gear (10).
4. The paper bowl shape detection device according to claim 2, characterized in that, The rotating shaft (8) is hollow, and the bottom of the rotating disk (2) is provided with a negative pressure opening (12). One end of the negative pressure opening (12) is connected to the negative pressure chamber (3), and the other end is connected to the inner hole of the rotating shaft (8). A negative pressure tube (13) is movably inserted through the bottom of the rotating shaft (8). A horizontal plate (14) is fixedly sleeved on the negative pressure tube (13). The horizontal plate (14) is connected to the U-shaped base (7) by screws. The end of the negative pressure tube (13) away from the rotating shaft (8) is connected to a vacuum pump through a negative pressure hose.
5. The paper bowl shape detection device according to claim 4, characterized in that, The side wall of the negative pressure pipe (13) is provided with an annular groove, and a sealing ring (15) is assembled in the annular groove. The sealing ring (15) is interference-fitted into the rotating shaft (8).
6. The paper bowl shape detection device according to claim 1, characterized in that, Two limiting rods (16) are spaced apart above the limiting conveyor belt (1), forming a limiting conveying space between the two limiting rods (16). One end of the limiting rod (16) is connected to the conveyor frame of the limiting conveyor belt (1) through a connecting rod (17).
7. The paper bowl shape detection device according to claim 6, characterized in that, A U-shaped limiting member (18) is provided at one end of the rotating disk (2) away from the limiting conveyor belt (1). The U-shaped opening of the U-shaped limiting member (18) faces the limiting conveyor belt (1). The end of the U-shaped limiting member (18) away from the rotating disk (2) is connected to the telescopic shaft of the pushing cylinder (19). The cylinder body of the pushing cylinder (19) is horizontally fixed.
8. The paper bowl shape detection device according to claim 6, characterized in that, The limiting rod (16) has several through holes (20) along its length direction. The conveyor frame of the limiting conveyor belt (1) has a threaded hole. The screw (21) passes through one of the through holes (20) and is threaded to the threaded hole.