Film edge defect detection device and system

Abstract

The film edge defect detection device at least comprises a support, a line scanning camera and a light source, the support is located above a film conveying platform and arranged in the width direction of a film, the line scanning camera is movably arranged on the support, the light source is arranged below the film, and the line scanning camera is movably arranged on the support. And the line scanning camera performs light-transmitting photographing on the edge of the thin film while the thin film is conveyed. According to the utility model, the linear scanning camera arranged above the film conveying surface is used for carrying out light-transmitting shooting on the film edge, the position of the linear scanning camera can be adjusted according to the width of the film material, so that images of cracks and burrs on the edges of different film materials can be obtained in real time, the structure is simple, and the operation is convenient. Meanwhile, the influence of the depth-of-field change of the camera on the image definition is avoided.

Description

Technical Field

[0001] The utility model provides a film edge defect detection device and system, in particular to a film edge crack and burr detection device and system, belonging to the technical field of machine vision detection. Background Art

[0002] Film materials are made of polymer resin as raw material and melted into film by heating. At present, in the production process of film materials, the edges of the formed film need to be cut in real time to cut into films of required size and shape for subsequent processing. However, due to the installation position, angle and wear of the cutting tool, cracks and burrs may exist on the cutting edges. The current situation is that if there are burrs on the edge of the film, a large amount of rough dust will be formed on the edge when the large roll of material is collected, affecting the production environment. If there are cracks, it will cause the roll to be rewound, which will cause the downstream customers to have the risk of film breakage during use.

[0003] In the prior art, the invention patent with publication number CN116203039A proposes a high-speed die-cut film burr detection system and detection method. The detection system includes a motion platform, a first camera, a second camera and a prism. The first camera takes pictures toward the edge of the film, and can move along the edge of the film or adjust the distance between the first camera and the edge of the film under the drive of the motion platform. The second camera is set on one side of the first camera, and uses the prism to simultaneously take pictures of the film, and calculates the center point coordinates by linear fitting. Therefore, it can not only realize the real-time detection function of the edge of the film, but also adjust the camera depth of field by controlling the distance between the line laser camera and the edge of the film through the motor, so as to make the product clearer. Due to the structural setting of the first camera, the second camera and the prism, the detection system solves the problem of image clarity caused by the change of the camera depth of field, but it has the problems of complex structure and high precision required for data processing. Utility Model Content

[0004] The purpose of the utility model is to provide a film edge defect detection device and system, which utilizes a line scan camera arranged above the film conveying surface to take light-transmitting photos of the film edge, and can adjust the position of the line scan camera according to the width of the film material, so as to obtain images of cracks and burrs on the edges of different film materials in real time. The structure is simple, and the influence of the change of the camera depth of field on the image clarity is also avoided.

[0005] The utility model is realized by the following technical solutions:

[0006] (I) A film edge defect detection device is provided, comprising a bracket, a line scan camera and a light source, wherein the bracket is located above a film conveying platform and is arranged along the width direction of the film, the line scan camera is movably arranged on the bracket, and the light source is arranged below the film, and the line scan camera takes a light-transmitting photo of the edge of the film while the film is being conveyed.

[0007] The bracket is provided with a screw rod and a motor for matching use, the screw rod is arranged along the width direction of the film, a guide roller is sleeved on the screw rod, and the line scanning camera is fixed on the guide roller.

[0008] The number of the screw, the motor, the guide roller and the line scan camera is two, and the two line scan cameras respectively take pictures of the edges on both sides of the film.

[0009] The bracket is provided with a slide rail, and the guide roller is provided with a sliding block matched with the slide rail.

[0010] The slide rail is provided with scale marks, and the guide roller is provided with a pointer used in conjunction with the scale marks.

[0011] The two ends of the bracket are fixed on the film conveying platform through supporting pieces.

[0012] (ii) A film edge defect detection system is provided, comprising a bracket, a line scan camera, a light source, an image processor and a display. The bracket is located above the film conveying platform and is arranged along the width direction of the film. The line scan camera is movably arranged on the bracket. The light source is arranged below the film. The line scan camera takes a light-transmitting photo of the edge of the film while the film is being conveyed. The image processor connects the line scan camera and the display via a communication signal.

[0013] The bracket is provided with a screw rod and a motor for matching use, the screw rod is arranged along the width direction of the film, a guide roller is sleeved on the screw rod, and the line scanning camera is fixed on the guide roller.

[0014] The bracket is provided with a slide rail, and the guide roller is provided with a sliding block matched with the slide rail.

[0015] An alarm is also included, and the image processor is connected to the alarm via a communication signal.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] (1) The utility model can be applied to the detection of edge burrs and cracks on film materials of different widths, and can achieve effective detection for film materials including transparent materials (such as glass, resin films, etc.) and translucent materials (such as non-woven fabrics, etc.).

[0018] (2) The utility model has a simple structural design. It uses a line scan camera to take a transparent photo of the edge of the film above the film conveying surface. During the film conveying process, the image of the edge of the film can be obtained in real time and transmitted to the image processor, thereby obtaining the detection conditions of the edge cracks and burrs of the film material, thereby realizing the rapid detection of edge defects of the film material.

[0019] (3) The utility model has a reasonable structural design. The motor is used to control the rotation of the screw to enable the guide roller mounted on the screw to move along the width of the film. Therefore, the transmission position of the line scan camera can be adjusted according to the width of the film material, thereby realizing the detection of film materials with different widths.

[0020] (4) The utility model also includes functional modules such as an image processor, a display and an alarm, which can adopt existing software integration modules. Among them, the image processor is used to obtain the image of the edge of the film taken by the line scan camera, and analyze and process the image to obtain the defect situation of the edge of the film, and then display the image and give an alarm according to the number and size of the defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the detection device of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the detection system of the utility model.

[0023] Among them, 1 is the bracket, 2 is the line scan camera, 3 is the film conveying platform, 4 is the film, 5 is the screw, 6 is the motor, 7 is the guide roller, 8 is the slide rail, 9 is the scale mark, 10 is the pointer, 11 is the support, 12 is the tank chain, and 13 is the light source. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0025] Embodiment 1:

[0026] This embodiment is a thin film edge defect detection device.

[0027] like Figure 1 As shown in the structure, the main components of the detection device include: a bracket 1, a line scan camera 2 and a light source 13. The bracket 1 is a fixed structure arranged above the film conveying platform 3 and along the width direction of the film 4. Both ends of the bracket 1 can be fixed to the film conveying platform 3 through support members 11. The light source 13 is arranged on the film conveying platform 3 and below the film 4. The line scan camera 2 can move horizontally on the bracket 1 and take light-transmitting photos of the edge of the film 4 while the film 4 is being conveyed.

[0028] The line scan camera 2 can adjust its position on the bracket 1 according to the width of the film 4 to ensure that the transmission position of the line scan camera 2 always matches the edge of the film 4. To achieve the position adjustment of the line scan camera 2, the present embodiment is provided with a screw 5, a motor 6 and a slide rail 8 on the bracket 1. The screw 5 and the motor 6 are used in conjunction with each other. The screw 5 and the slide rail 8 are both arranged along the width direction of the film 4. A guide roller 7 is sleeved on the screw 5. The line scan camera 2 is fixed on the guide roller 7. The guide roller 7 is provided with a slider that cooperates with the slide rail 8. The motor 6 drives the screw 5 to rotate. The screw 5 rotates to realize the horizontal movement of the guide roller 7 along the screw 5 and the slide rail 8, thereby realizing the position adjustment of the line scan camera 2.

[0029] In order to ensure that the line scan camera 2 can detect the edges of both sides of the film 4 while it is being transported, in a specific embodiment, two screws 5, two motors 6, two guide rollers 7 and two line scan cameras 2 are respectively arranged on the bracket 1. Specifically, the line scan camera 2 can be configured as follows: Figure 1 As shown in the structure, motors 6 (such as stepping motors) are respectively arranged at the two ends of the bracket 1, and two screws 5 are respectively arranged at positions near the ends of the bracket 1 (i.e. above the edge of the film 4), and the slide rail 8 can be arranged along the entire bracket 1 or as shown in FIG. Figure 1 As shown, two corresponding screws 5 are respectively arranged into two sections of slide rails 8, and two motors 6 respectively control the rotation of the two screws 5, so as to realize the position adjustment of the two corresponding line scan cameras 2 above the edges of both sides of the film 4. In order to accurately control the moving distance of the line scan camera 2 on the bracket 1, a scale mark 9 can be set on the slide rail 8, and a pointer 10 used in conjunction with the scale mark 9 can be set on the guide roller 7. When in use, according to the change in the width of the film material, the scale mark 9 shown by the pointer 10 can be used to quickly and accurately realize the position adjustment of the corresponding line scan camera 2.

[0030] During detection in this embodiment, first, the line scan camera 2 and the light source 13 are turned on, and the line scan camera 2 is used to take a light-transmitting photograph of the edge of the film 4 from the top of the conveying surface of the film 4 downward. During the conveying process of the film 4, if there are burrs and cracks, the transmitted light will be changed and captured by the line scan camera 2, thereby changing the grayscale waveform scanned by the line scan camera 2. The line scan camera 2 captures the scanned grayscale waveform data in real time. After analysis and processing, the detection status of the cracks and burrs at the edge of the film 4 can be obtained.

[0031] Embodiment 2:

[0032] This embodiment is a thin film edge defect detection system.

[0033] The main components of the detection system include a bracket 1, a line scan camera 2, a light source 13, an image processor, a display and an alarm, wherein the structures of the bracket 1 and the line scan camera 2 are the same as those of the detection device of Example 1, and the bracket 1 is provided with a screw 5, a motor 6, a slide rail 8 and a guide roller 7, and the line scan camera 2 can realize position adjustment. That is, this embodiment adds the image processor, the display and the alarm on the basis of the detection device of Example 1.

[0034] like Figure 2 As shown in the structure, the image processor of this embodiment is connected to the line scan camera 2 and the display through a communication signal, and the image processor is connected to the alarm through a communication signal. During detection, the line scan camera 2 transmits the grayscale waveform data obtained by scanning to the image processor through a communication signal, and the image processor reads the changes in the grayscale waveform to detect related defects. At the same time, after analyzing and processing the defects, data such as the number of defects and the size of defects can be obtained, and the data is transmitted to the display and the alarm through a communication signal at the same time. The display displays the defect situation through the screen, and the alarm gives an alarm light prompt, which is convenient for the inspection personnel to quickly obtain the abnormal situation of the inspection.

[0035] The image processor, display and alarm described in this embodiment can all adopt functional modules integrated by existing software. For example, the image processor can integrate an AI chip, and can perform preset defect classifications for different defects through AI classification, and finally display the screen and give an alarm according to the number and size of the defects. In addition, the communication signals between the image processor, display and alarm can be transmitted wirelessly or wired. When wired signal transmission is adopted, a tank chain 12 can also be set on the corresponding moving track of the device to realize the protection of communication and other related power supply lines.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A film edge defect detection device, characterized in that: The device comprises a support (1), a line scan camera (2) and a light source (13); the support (1) is located above a film conveying platform (3) and is arranged along the width direction of a film (4); the line scan camera (2) is movably arranged on the support (1); the light source (13) is arranged below the film (4); and the line scan camera (2) takes a light-transmitting photograph of the edge of the film (4) while the film (4) is being conveyed.

2. A thin film edge defect detection device according to claim 1, characterized in that: The support (1) is provided with a screw rod (5) and a motor (6) for use together. The screw rod (5) is arranged along the width direction of the film (4). A guide roller (7) is sleeved on the screw rod (5). The line scan camera (2) is fixed on the guide roller (7).

3. A film edge defect detection device according to claim 2, characterized in that: The number of the screw (5), the motor (6), the guide roller (7) and the line scan camera (2) is two, and the two line scan cameras (2) respectively take pictures of the edges of both sides of the film (4).

4. A film edge defect detection device according to any one of claims 2 or 3, characterized in that: A slide rail (8) is provided on the bracket (1), and a slider matching the slide rail (8) is provided on the guide roller (7).

5. A film edge defect detection device according to claim 4, characterized in that: The slide rail (8) is provided with a scale mark (9), and the guide roller (7) is provided with a pointer (10) used in conjunction with the scale mark (9).

6. A film edge defect detection device according to claim 4, characterized in that: Both ends of the bracket (1) are fixed on the film conveying platform (3) via support members (11).

7. A film edge defect detection system, characterized in that: The device comprises a support (1), a line scan camera (2), a light source (13), an image processor and a display, wherein the support (1) is located above a film conveying platform (3) and is arranged along the width direction of the film (4), the line scan camera (2) is movably arranged on the support (1), the light source (13) is arranged below the film (4), the line scan camera (2) takes a light-transmitting photograph of the edge of the film (4) while the film (4) is being conveyed, and the image processor connects the line scan camera (2) and the display via a communication signal.

8. A film edge defect detection system according to claim 7, characterized in that: The support (1) is provided with a screw rod (5) and a motor (6) for use together. The screw rod (5) is arranged along the width direction of the film (4). A guide roller (7) is sleeved on the screw rod (5). The line scan camera (2) is fixed on the guide roller (7).

9. A film edge defect detection system according to any one of claims 7 or 8, characterized in that: A slide rail (8) is provided on the bracket (1), and a slider matching the slide rail (8) is provided on the guide roller (7).

10. A film edge defect detection system according to claim 7, characterized in that: An alarm is also included, and the image processor is connected to the alarm via a communication signal.

Images