CCD (Charge Coupled Device) visual inspection equipment

Abstract

The utility model discloses CCD (Charge Coupled Device) visual inspection equipment which is characterized by comprising a rack, an unwinding disc, a winding disc, a motor, a CCD camera, a light source and an inspection box, the detection box is fixedly arranged on the rack, and an inlet and an outlet are formed in the left side wall and the right side wall of the detection box respectively; the upper and lower walls of the detection box are respectively provided with a detection port and an illumination port; a lead-in shaft, two rolling components and a lead-out shaft are mounted in the detection box; the two rolling-out assemblies are equal in height and are distributed left and right at an interval; the unwinding disc is located beside the inlet. The winding disc is located beside the outlet. The motor is used for driving the winding disc to rotate; the CCD camera is located at the detection port; the light source is located at the irradiation opening. According to the utility model, appearance detection can be carried out on the optical film in a closed environment and in a flat state, interference can be reduced, and the visual detection precision and efficiency of products can be improved.

Description

Technical Field

[0001] The utility model relates to a CCD visual detection device. Background Art

[0002] Surface defect detection of optical films is an important link in the field of optical manufacturing, and it is of great significance to ensure the quality of optical products. The traditional manual detection method relies on the naked eye or a magnifying glass to observe and record defects. However, this detection efficiency is low and it is easy to miss detections and cannot meet the high-precision detection needs of large-scale production. At present, when inspecting products in other fields (non-transparent and non-thin film products), there are also visual inspection equipment based on CCD cameras (such as CN210381148U, CN217304934U, CN116078704A, CN115855954A, CN217369296U and other published patents), and by simulating the functions and characteristics of the human visual system, it can realize automatic, fast and accurate defect detection of product surface defects, thereby greatly improving production efficiency and reducing costs. However, when used on transparent and thin optical films (special products), there are the following shortcomings:

[0003] Since the existing CCD visual inspection equipment is in a non-sealed state, there is a problem of light interference (natural light, external light, reflected light, etc.) when inspecting transparent and thin optical films, which affects the detection accuracy; secondly, since the optical film is soft and easily wrinkled, which are unfavorable factors that affect the detection effect, further performance and function improvements are needed for the existing technology. Utility Model Content

[0004] The utility model provides a CCD visual inspection device for solving the technical problem that when existing equipment adopts CCD visual inspection for optical films, there are unfavorable factors such as light interference, uneven wrinkles and the like, which affect the inspection quality.

[0005] In order to achieve the above-mentioned purpose, the solution of the utility model is: a CCD visual inspection equipment, characterized in that: it includes a frame, a unwinding reel, a winding reel, a motor, a CCD camera, a light source and a detection box; the detection box is fixedly arranged on the frame, and the left and right side walls of the detection box are respectively provided with an entrance and an exit; the upper and lower walls of the detection box are respectively provided with a detection port and a light-illuminating port; an import shaft, two flattening components and an export shaft are installed in the detection box; the two flattening components are at the same height and are spaced apart on the left and right; the unwinding reel is located next to the entrance; the winding reel is located next to the exit; the motor is used to drive the winding reel to rotate; the CCD camera is located at the detection port; the light source is located at the light-illuminating port.

[0006] Preferably, the rolling assembly comprises an upper rolling shaft and a lower rolling shaft; the upper rolling shaft and the lower rolling shaft are distributed vertically and a gap is formed between the upper rolling shaft and the lower rolling shaft so that the optical film can just pass through.

[0007] Preferably, the motor is a servo motor.

[0008] Preferably, a transparent cover is installed to seal the light port.

[0009] Preferably, the detection box is made of stainless steel.

[0010] Preferably, the CCD camera is mounted on the rack via a camera bracket; the camera bracket can be used for adjusting the height of the CCD camera.

[0011] Beneficial effects of the utility model:

[0012] First, the utility model can realize the appearance inspection of optical films in a closed environment and in a flat state, which can reduce light interference and improve the visual inspection accuracy of products;

[0013] Second, the utility model can perform continuous detection, and at the same time can greatly improve the real-time and accuracy of industrial online measurement, and also significantly improve production efficiency and quality control;

[0014] Third, the utility model can prevent dust from entering the detection box from below the light-emitting port because a transparent cover is installed at the light-emitting port, thereby ensuring dust-free and reducing interference with detection;

[0015] Third, since the detection box of the present invention is made of stainless steel, it can avoid rust and iron filings falling, which can reduce interference with detection;

[0016] Fourth, the utility model allows the CCD camera to be installed on the frame through a camera bracket; the camera bracket can be used to adjust the height of the CCD camera. The working distance of the CCD camera for collecting the flat section of the optical film can be adjusted, and the focal length of the lens can be adjusted to achieve close and long-distance adjustment to achieve the best working position and improve the clarity and accuracy of the collected image (signal). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a main view of a CCD visual detection device in the utility model when it is in working state.

[0018] Figure 2 yes Figure 1 Enlarged view of point Y in the middle.

[0019] Figure 3 It is a left view of a CCD visual detection device in the utility model.

[0020] Figure 4It is a stereoscopic diagram of a CCD vision detection device in the utility model.

[0021] Figure 5 yes Figure 4 Enlarged view of the middle Z. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Example 1: See Figure 1-5 , a CCD visual inspection device, which includes a frame 1, a reel 2, a reel 3, a motor 4, a CCD camera 5, a light source 6 and a detection box 7;

[0024] The detection box 7 is fixedly mounted on the frame 1, and the left and right side walls of the detection box 7 are respectively provided with an entrance 7-1 and an exit 7-2; the upper and lower walls of the detection box 7 are respectively provided with a detection port 7-3 and a light port 7-4;

[0025] The detection box 7 is provided with an introduction shaft 8, two flattening components 9 and an outlet shaft 10; the two flattening components 9 are of the same height and are spaced apart from each other.

[0026] Specifically, the introduction shaft 8 is rotatably installed in the detection box 7 and is close to the inlet 7-1, and the derivation shaft 10 is rotatably installed in the detection box 7 and is close to the outlet 7-2.

[0027] The unwinding reel 2 is located next to the inlet 7-1; the rewinding reel 3 is located next to the outlet 7-2; and the motor 4 is used to drive the rewinding reel 3 to rotate. Specifically, the unwinding reel 2 is rotatably mounted on the frame 1; the rewinding reel 3 is rotatably mounted on the frame 1, and the output end of the motor 4 is connected to the rewinding reel 3.

[0028] The CCD camera 5 is located at the detection port 7-3, and the light source 6 is located at the illumination port 7-4. Specifically, the CCD camera 5 is connected to a control host circuit, and the control host and software program system can adopt existing technologies, so they are not described in detail.

[0029] When this embodiment is working, the unwinding disk 2 is used for unwinding the optical film, and the winding disk 3 is used for winding the optical film, and the motor 4 drives the winding disk 3 to rotate, which can realize automatic winding to replace manual operation. The drive of the motor 4 can also make the optical film move evenly, thereby ensuring that the CCD camera does not advance or lag during continuous detection. Therefore, it can also solve the problem of manual winding that is difficult to control the speed and affects the detection speed and quality.

[0030] During inspection, a light source 6 (e.g., an LED) emits upward light from the illumination port 7-4, while a CCD camera 5 captures real-time images of the optical film. The image information is fed back to the control host and then compared with database parameters. If any non-conforming issues are detected, an alarm or display output is issued. This system can be used to capture and measure stains, scratches, edge defects, cracks, chromatic aberration, and other defects on the optical film. Its operating principle involves three steps: image acquisition, image processing, and judgment. The CCD camera captures images of the product and analyzes them using image processing techniques. It determines whether the product is qualified based on preset standards. If any issues are identified, an alarm is automatically issued, alerting staff to address the issue. The CCD camera 5 detects the presence of certain features on the product. Feature determination is performed using database operations. The product's conformity is determined based on the presence or absence of new features that exceed existing features. CCD camera visual inspection equipment utilizes a non-contact measurement method that avoids damage to the object being measured and can replace manual operation, ensuring production efficiency and safety.

[0031] During inspection, when light source 6 shines light onto the flat surface of the optical film, the CCD camera captures the image data of the optical film and converts it into an electrical signal. The electrical signal is then transmitted to the processor for analysis. The processor determines whether the product meets the requirements based on the standards we set, such as the product's color and shape. If the product has any defects, such as scratches or deformation, the processor will sound an alarm, indicating that the product is unqualified. By using CCD cameras to inspect the product's appearance, we can greatly improve production quality and efficiency. This is because CCD cameras can inspect products in a very short time and with very high accuracy. This allows us to identify problems promptly and take appropriate measures to resolve them, preventing unqualified products from entering the market.

[0032] The present embodiment has good continuity and high precision during detection, greatly improving the real-time and accuracy of industrial online measurement, and also significantly improving production efficiency and quality control.

[0033] During inspection, the optical film is unwound from the unwinding reel 2 and then introduced from the inspection box 7 through the inlet 7-1. It is then guided through the inlet shaft 8 and into the inspection box 7. It is then flattened by two flattening assemblies 9. The light source 6 illuminates the flattened section N-1 of the optical film N upward, and the CCD camera captures an image of the flattened section N-1 downward. The optical film N is then guided by the outlet shaft 10 and exits the outlet 7-2 before being automatically rewound by the reel 3, enabling automated, continuous, and sealed inspection. Because the optical film N is inspected in a sealed state within the inspection box 7, interference from external light is avoided. The flattening of the optical film N by the two flattening assemblies 9 allows for illumination and image data collection of the flattened section N-1 of the optical film N, reducing wrinkle interference, improving inspection precision, and ensuring the accuracy of the test results.

[0034] Preferably, the flattening assembly 9 includes an upper roller 9-1 and a lower roller 9-2, which are rotatably mounted within the inspection box 7. The upper roller 9-1 and the lower roller 9-2 are arranged vertically, with a gap between them just wide enough for the optical film to pass through. The combined action of the upper roller 9-1 and the lower roller 9-2 allows the optical film to be flattened.

[0035] Preferably, the motor 4 is a servo motor. The servo motor has a variety of operating modes to choose from, and parameters (such as speed) can be adjusted according to detection requirements to better cooperate with the CCD camera to complete the task.

[0036] Preferably, a transparent cover 7-5 is installed to seal the light port 7-4, thereby preventing dust from entering the detection box 7 from below the light port 7-4, ensuring dust-free conditions and reducing interference with detection.

[0037] Preferably, the detection box 7 is made of stainless steel to avoid rust and iron filings falling, thereby reducing interference with detection.

[0038] Example 2: This example is basically the same as Example 1, except that:

[0039] See Figure 3-5 Furthermore, the CCD camera 5 is mounted on the frame 1 via a camera bracket 11; the camera bracket 11 can be used to adjust the height of the CCD camera 5. The CCD camera 5 can adjust the collection distance of the flat section N-1 of the optical film N, and the focal length of the lens can be adjusted to achieve close-range and long-range adjustment to achieve the optimal working position, improving the clarity and accuracy of the collected image (signal).

[0040] See Figure 3-5In this embodiment, the camera bracket 11 includes a column 11-1, a slide rail 11-2, a screw rod 11-3 and a slide 11-4; the lower end of the column 11-1 is fixedly connected to the frame 1, the slide rail 11-2 is fixed to the upper part of the column 11-1, the slide 11-4 is slidably matched with the slide rail 11-2, and two supports 11-5 are fixedly provided at the upper and lower ends of the slide rail 11-2; the screw rod 11-3 is vertically arranged and rotatably matched with the two supports 11-5, and the upper end of the screw rod 11-3 is connected to the handle 11-6; the screw rod 11-3 is threadedly matched with the slide 11-4; the CCD camera 5 is fixedly mounted on the slide 11-4. During adjustment, the handle 11-6 is rotated to drive the screw rod 11-3 to rotate and drive the slide 11-4 to slide up or down along the slide rail 11-2, and the CCD camera 5 moves up or down with the slide 11-4, thereby realizing the position and working height adjustment of the CCD camera 5.

[0041] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A CCD visual inspection device, characterized in that: It includes a frame (1), a reel (2), a reel (3), a motor (4), a CCD camera (5), a light source (6) and a detection box (7); The detection box (7) is fixedly mounted on the frame (1); the left and right side walls of the detection box (7) are respectively provided with an inlet (7-1) and an outlet (7-2); the upper and lower walls of the detection box (7) are respectively provided with a detection port (7-3) and a light-illuminating port (7-4); An introduction shaft (8), two flattening assemblies (9) and an outlet shaft (10) are installed in the detection box (7); the two flattening assemblies (9) are of the same height and are spaced apart from each other. The unwinding reel (2) is located beside the inlet (7-1); the winding reel (3) is located beside the outlet (7-2); the motor (4) is used to drive the winding reel (3) to rotate; The CCD camera (5) is located at the detection port (7-3); and the light source (6) is located at the illumination port (7-4).

2. A CCD visual inspection device according to claim 1, characterized in that: The rolling assembly (9) comprises an upper rolling shaft (9-1) and a lower rolling shaft (9-2). The upper rolling shaft (9-1) and the lower rolling shaft (9-2) are distributed vertically and form a gap therebetween for the optical film (N) to just pass through.

3. A CCD visual inspection device according to claim 1, characterized in that: The motor (4) is a servo motor.

4. A CCD visual inspection device according to claim 1, characterized in that: The light-emitting port (7-4) is sealed and installed with a transparent cover (7-5).

5. The CCD visual inspection device according to claim 1, wherein: The detection box (7) is made of stainless steel.

6. A CCD visual inspection device according to claim 1, characterized in that: The CCD camera (5) is mounted on the frame (1) via a camera bracket (11); the camera bracket (11) can be used to adjust the height of the CCD camera (5).

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