Multi-direction paper support surface defect detection device

Abstract

The utility model provides a multidirectional paper tray surface defect detection device which comprises a rotating disc, CCD detection systems and a mounting mechanism, the rotating disc is mounted above a conveying belt of a paper tray to be detected through the mounting mechanism, and at least one CCD detection system is mounted on the rotating disc; the CCD detection system comprises an angle-adjustable rotating platform, a driving mechanism and a camera. The paper tray surface defect detection device has the beneficial effects that through the multi-direction global camera of machine vision, pictures are taken from multiple angles at the same time, and image recognition is carried out on global surface defects of paper tray products, so that the detection accuracy is greatly improved, and the production efficiency is improved; the machine vision device can dynamically and automatically adjust the shooting position and angle, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of surface defect detection of paper trays, and particularly relates to a multi-directional paper tray surface defect detection device. Background Art

[0002] In the industrial production process, due to the deficiencies and limitations of existing technologies, working conditions and other factors, it is extremely easy to affect the quality of finished products. Among them, surface defects are the most intuitive manifestation of the affected product quality. Therefore, in order to ensure the qualified rate and reliable quality, it is necessary to detect the surface defects of products. "Defects" generally can be understood as the absence, defects or areas compared with normal samples. Surface defect detection refers to detecting defects such as scratches, defects, foreign object occlusion, color contamination, holes, etc. on the surface of the sample, so as to obtain a series of relevant information such as the category, contour, position, size, etc. of the surface defects of the measured sample. Manual defect detection used to be the mainstream method, but this method is inefficient; the detection results are easily affected by human subjective factors and cannot meet the requirements of real-time detection. It has gradually been replaced by other methods.

[0003] In recent years, as the defects of plastic products being difficult to degrade have begun to emerge, the areas implementing plastic bans have gradually expanded, and pulp products as plastic substitutes have flowed into the market. In the related technologies, when processing paper trays, it is often necessary to manually screen whether the processed paper trays are intact and whether there are defects after processing, with low work efficiency and easy to make mistakes. Defects on the surface of paper trays, such as mosquitoes, holes, black spots, wrinkles, etc., will seriously affect the aesthetics and practicality of paper trays. Due to the large number of paper tray products produced, the workload of manual detection is huge. There are automatic detection devices for paper tray processing in the existing technologies, but there are obvious deficiencies. They can only detect one surface of the paper tray and cannot achieve dynamic multi-directional surface detection. The camera cannot adaptively adjust the focal length to take pictures according to the size, height of the paper tray. Moreover, a clamping mechanism is required to clamp the paper tray, and it is detected through a flipping mechanism, and the side cannot be detected. Moreover, the shapes and sizes of paper trays are different, and different fixtures need to be customized. And generally, multiple surfaces of a paper tray need to be defect-detected, and one camera cannot solve the problem of multi-surface vision detection. The inability to automatically focus will result in insufficient clarity of the taken pictures, affecting the detection quality. Summary of the Utility Model

[0004] In view of this, the present utility model aims to propose a multi-directional paper tray surface defect detection device to solve at least one of the problems existing in the above-mentioned existing technologies.

[0005] To achieve the above object, the technical solution of the present utility model is realized as follows:

[0006] The utility model provides a multi-directional paper tray surface defect detection device, which includes a rotating disk, a CCD detection system and a mounting mechanism. The rotating disk is mounted above the conveyor belt of the paper tray to be detected through the mounting mechanism, and at least one CCD detection system is mounted on the rotating disk. The CCD detection system includes an adjustable-angle rotating platform, a driving mechanism and a camera. The adjustable-angle rotating platform is mounted on one side of the rotating disk. The driving mechanism is mounted at the bottom of the adjustable-angle rotating platform. The driving mechanism is in transmission connection with the rotating disk. The camera is mounted at the top of the adjustable-angle rotating platform. The CCD detection system is connected to a local computer.

[0007] Further, the rotating disk is a hollow ring structure, and a gear structure is provided on the outer ring of the rotating disk. The rotating disk is in meshing transmission with the driving mechanism through the gear structure.

[0008] Further, the adjustable-angle rotating platform is a U-shaped structure. The driving mechanism includes a driving motor and a driving gear. The driving motor is mounted at the bottom of the adjustable-angle rotating platform. The output shaft of the driving motor passes through the bottom of the adjustable-angle rotating platform and coaxially mounts the driving gear. The driving gear is in meshing transmission with the gear structure of the rotating disk.

[0009] Further, the camera is a ccb high-speed camera.

[0010] Further, the paper tray to be detected is mounted on the conveyor belt, and the conveyor belt is mounted on the conveyor belt support.

[0011] Further, the mounting mechanism includes a support, a left servo motor, a right servo motor, a left motor lead screw and a right motor lead screw. The support is used to mount the camera at the center of the top of the rotating disk. The bottoms of the left servo motor and the right servo motor are both mounted on the conveyor belt support. The output shaft of the left servo motor is connected to the left motor lead screw. The output shaft of the right servo motor is connected to the right motor lead screw. The screw nuts of the left motor lead screw and the right motor lead screw are respectively connected to the bottom of a driving mechanism.

[0012] Further, the number of cameras is two, and the two cameras are symmetrically arranged on the left and right sides above the rotating disk.

[0013] Further, the number of cameras is five. Among them, four cameras are equidistantly distributed on the front, back, left and right sides above the rotating disk, and one camera is distributed at the center of the top of the rotating disk through a support.

[0014] Compared with the prior art, the multi-directional paper tray surface defect detection device described in the utility model has the following advantages:

[0015] The multi-directional paper tray surface defect detection device described in the present utility model. The present utility model uses a multi-directional global camera of machine vision to take pictures from multiple angles simultaneously, perform image recognition on the global surface defects of the paper tray product, greatly improving the detection accuracy and production efficiency. The machine vision device of the present utility model can dynamically and automatically adjust the shooting position and angle, greatly improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0017] Figure 1 Schematic diagram of the detection device described in the embodiment of the present utility model;

[0018] Figure 2 Schematic diagram of the five-camera detection device described in the embodiment of the present utility model;

[0019] Figure 3 Schematic diagram of the two-camera detection device described in the embodiment of the present utility model.

[0020] Description of the reference numerals:

[0021] 1. Rotating disk; 2. Adjustable-angle rotating platform; 3. Driving mechanism; 31. Driving motor; 32. Driving gear; 4. Camera; 5. Bracket; 6. Left servo motor; 7. Right servo motor; 8. Left motor lead screw; 9. Right motor lead screw; 10. Conveyor belt; 11. Paper tray to be detected; 12. Conveyor belt bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0025] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0026] As Figures 1 to 3 shown, a multi-directional paper tray surface defect detection device includes a rotating disk 1, a CCD detection system, and a mounting mechanism. The rotating disk 1 is mounted above the conveyor belt 10 of the paper tray 11 to be detected through the mounting mechanism, and at least one CCD detection system is mounted on the rotating disk 1; the CCD detection system includes an adjustable angle rotating platform 2, a driving mechanism 3, and a camera 4. The adjustable angle rotating platform 2 is mounted on one side of the rotating disk 1, the driving mechanism 3 is mounted at the bottom of the adjustable angle rotating platform 2, the driving mechanism 3 is in transmission connection with the rotating disk 1, and the camera 4 is mounted at the top of the adjustable angle rotating platform 2. The CCD detection system is connected to a local computer. In this embodiment, the angle between the camera 4 and the adjustable angle rotating platform 2 can be adjusted by mounting bolts and nuts, and then the vertical (i.e., up and down) angle of the shooting view of the camera 4 is adjusted. The up and down angle rotation range is 45°. In actual use, one or two CCD cameras can be optionally selected. The CCD cameras can be rotated 45° in structure, shoot four surfaces, take four pictures of the same product, and are transmitted to the local computer through the USB3.0 high-speed protocol for processing to calculate whether the product is a good product or a defective product. Figure 3It is a two-camera detection system.

[0027] The technical problem to be solved by the present utility model is to design a follow-up multi-direction multi-camera device to solve the problem of multi-faceted shooting detection of paper trays. The paper tray surface defect detection system based on machine vision technology in this application can quickly, efficiently and accurately detect the defects on the surface of the paper tray, thus ensuring the product quality.

[0028] In a preferred embodiment of the present utility model, the rotating disk 1 is a hollow ring structure, and the outer ring of the rotating disk 1 is provided with a tooth structure. The rotating disk 1 is meshed and driven with the driving mechanism 3 through the tooth structure. In actual use, the driving mechanism 3 can drive the rotating disk 1 to rotate, thereby driving the camera 4 at the center of the rotating disk 1 to rotate, achieving the purpose of follow-up multi-direction shooting. In actual use, since the camera 4 at the center of the rotating disk 1 is installed on the rotating disk 1 through the bracket 5, in order to avoid affecting the other four cameras 4, the horizontal (i.e., left and right) angle of rotation of the camera 4 at the center of the rotating disk 1 can be rotated by 45°.

[0029] In a preferred embodiment of the present utility model, the adjustable angle rotating platform 2 is a U-shaped structure. The driving mechanism 3 includes a driving motor 31 and a driving gear 32. The driving motor 31 is installed at the bottom of the adjustable angle rotating platform 2, and the output shaft of the driving motor 31 passes through the bottom of the adjustable angle rotating platform 2 and is coaxially installed with the driving gear 32. The driving gear 32 is meshed and driven with the tooth structure of the rotating disk 1. In this embodiment, the driving motor 31 can be a stepping motor with an optical encoder. In actual use, the purpose of setting the adjustable angle rotating platform 2 as a U-shaped structure is to provide an avoidance function for the tooth structure on the outer ring of the rotating disk 1 to be meshed and driven with the driving mechanism 3, so as not to affect the driving mechanism 3 to drive the rotating disk 1 to rotate, and then drive the camera 4 at the center of the rotating disk 1 to rotate.

[0030] In a preferred embodiment of the present utility model, the camera 4 is a ccb high-speed camera, and the ccb high-speed camera can adjust the focal length and shooting angle, with stronger practicability and better shooting effect of product pictures.

[0031] In a preferred embodiment of the present utility model, the paper tray 11 to be detected is installed on the conveyor belt 10, and the conveyor belt 10 is installed on the conveyor belt bracket 12.

[0032] In a preferred embodiment of the present utility model, the installation mechanism includes a bracket 5, a left servo motor 6, a right servo motor 7, a left motor lead screw 8 and a right motor lead screw 9. The bracket 5 is used to install the camera 4 at the center of the top of the rotating disk 1. The bottoms of the left servo motor 6 and the right servo motor 7 are both installed on the conveyor belt bracket 12. The output shaft of the left servo motor 6 is connected to the left motor lead screw 8, and the output shaft of the right servo motor 7 is connected to the right motor lead screw 9. The lead screw nuts of the left motor lead screw 8 and the right motor lead screw 9 are respectively connected to the bottom of a driving mechanism 3. In this embodiment, when the left servo motor 6 and the right servo motor 7 work, they can drive the left motor lead screw 8 and the right motor lead screw 9 to rotate respectively. When the left motor lead screw 8 and the right motor lead screw 9 rotate, they can drive their respective lead screw nuts to move up and down, and then drive the rotating disk 1 to move up and down, so as to adjust the height between the camera 4 and the paper tray 11 to be detected.

[0033] In a preferred embodiment of the present utility model, the number of the cameras 4 is two, and the two cameras 4 are symmetrically arranged on the left and right sides above the rotating disk 1.

[0034] In a preferred embodiment of the present utility model, the number of the cameras 4 is five. Among them, four cameras 4 are equidistantly distributed on the front, back, left and right sides above the rotating disk 1, and one camera 4 is distributed at the center of the top of the rotating disk 1 through the bracket 5.

[0035] In this embodiment, the system of the local computer selects the more stable linux system as the operating system. The linux operating system is lighter, runs faster and is more stable than windows. A 512g solid-state drive is mounted to store the items to be measured for inspection. This system is an offline system.

[0036] During actual use, an industrial control display screen can be installed on site to display the production conditions, parameter settings and alarm prompts.

[0037] Embodiment 1

[0038] See Figure 2 , the top view of the multi-directional paper tray surface defect detection device in this embodiment, includes five cameras 4. A, B, C, D are 4 global cameras in the front, back, left and right directions, and E is the top global camera. 1 is the rotating disk, that is, the sliding track of the camera. 5 is the bracket. The top global camera E is installed on the middle of the rotating disk 1 through the bracket.

[0039] The 5 global cameras can take pictures from 5 angles at the same time, and are transmitted to the local computer through the vision router. The rotating disk 1 can move up and down according to the height of the material and take pictures at a suitable angle.

[0040] Embodiment 2

[0041] SeeFigure 3 Figure 1 is a front view of the multi-directional paper tray surface defect detection device of this embodiment, including two cameras 4, namely the left and right cameras b and d, 1 is a rotating disk, which is the sliding track of the cameras, 6 and 7 are the left and right servo motors, 8 and 9 are the left and right motor lead screws, 10 is a conveyor belt, 12 is a conveyor belt support, and 11 is the paper tray to be detected.

[0042] After the paper tray 11 on the conveyor belt 10 reaches the photographing position, it triggers the camera to take a picture.

[0043] Advantages of the present utility model:

[0044] (1) Through the multi-directional global cameras of machine vision in the present utility model, pictures are taken from multiple angles simultaneously, and image recognition is performed on the global surface defects of the paper tray products, greatly improving the detection accuracy and production efficiency.

[0045] (2) The machine vision device of the present utility model can dynamically and automatically adjust the photographing position and angle, greatly improving the production efficiency.

[0046] It should be noted that all the electrical components involved in this application are of the prior art.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Multi-directional paper tray surface defect detection device, characterized by: The invention comprises a rotating disk (1), a CCD detection system and a mounting mechanism. The rotating disk (1) is mounted above a conveyor belt (10) of a paper holder (11) to be detected through the mounting mechanism. At least one CCD detection system is mounted on the rotating disk (1). The CCD detection system comprises an adjustable angle rotating platform (2), a driving mechanism (3) and a camera (4). The adjustable angle rotating platform (2) is mounted on one side of the rotating disk (1). The driving mechanism (3) is mounted on the bottom of the adjustable angle rotating platform (2). The driving mechanism (3) is connected to the rotating disk (1) in a transmission manner. The camera (4) is mounted on the top of the adjustable angle rotating platform (2). The CCD detection system is connected to a local computer.

2. The multi-directional paper support surface defect detection device according to claim 1, characterized in that: The rotating disk (1) is a hollow annular structure, and the outer ring of the rotating disk (1) is provided with a gear structure, and the rotating disk (1) is meshed with the driving mechanism (3) for transmission via the gear structure.

3. The multi-directional paper support surface defect detection device according to claim 1, characterized in that: The adjustable angle rotating platform (2) is of a U-shaped structure. The driving mechanism (3) comprises a driving motor (31) and a driving gear (32). The driving motor (31) is installed at the bottom of the adjustable angle rotating platform (2). The output shaft of the driving motor (31) passes through the bottom of the adjustable angle rotating platform (2) and is coaxially installed with the driving gear (32). The driving gear (32) is meshed with the gear tooth structure of the rotating disk (1) for transmission.

4. The multi-directional paper support surface defect detection device according to claim 1, characterized in that: The camera (4) is a CCB high-speed camera.

5. The multi-directional paper support surface defect detection device according to claim 1, characterized in that: The paper holder to be detected (11) is installed on the conveyor belt (10), and the conveyor belt (10) is installed on the conveyor belt bracket (12).

6. The multi-directional paper support surface defect detection device according to claim 1, characterized in that: The number of the cameras (4) is two, and the two cameras (4) are symmetrically arranged on the left and right sides above the rotating disk (1).

7. The multi-directional paper support surface defect detection device according to claim 1, characterized in that: The number of the cameras (4) is five, wherein four cameras (4) are evenly distributed on the front, back, left, and right sides of the rotating disk (1), and one camera (4) is distributed at the top center of the rotating disk (1) via a bracket (5).

8. The multi-directional paper support surface defect detection device according to claim 7, characterized in that: The mounting mechanism comprises a bracket (5), a left servo motor (6), a right servo motor (7), a left motor lead screw (8) and a right motor lead screw (9); the bracket (5) is used to mount a camera (4) at the top center of a rotating disk (1); the bottoms of the left servo motor (6) and the right servo motor (7) are both mounted on a conveyor belt bracket (12); the output shaft of the left servo motor (6) is connected to the left motor lead screw (8); the output shaft of the right servo motor (7) is connected to the right motor lead screw (9); and the lead screw nuts of the left motor lead screw (8) and the right motor lead screw (9) are respectively connected to the bottom of a driving mechanism (3).

Images