A mobile phone glass plate appearance defect detection system

Abstract

The utility model relates to the technical field of defect detection more specifically, relate to a kind of mobile phone glass plate appearance defect detection system, detection system includes rack, control system, tray and respectively with the communication connection of conveying mechanism, multiple cameras and multiple light sources of control system, conveying mechanism is installed in rack, the output end of conveying mechanism is connected for placing the tray of mobile phone glass plate;Multiple light sources and multiple cameras are correspondingly set for mobile phone glass plate, for shooting the image of mobile phone glass plate;Control system is used to detect the image photographed by camera and display detection result;Tray is equipped with the detection area that penetrates the top and bottom of tray, and the detection area is provided with the support part for carrying mobile phone glass plate, and the acceleration of control system controls the tray to make the support part and mobile phone glass plate generate relative displacement.The utility model can realize the omnibearing scanning detection of mobile phone glass plate, improve image quality and detection speed.

Description

Technical Field

[0001] This utility model relates to the technical field of defect detection, and more specifically, to a mobile phone glass plate appearance defect detection system. Background Technology

[0002] The appearance defects of mobile phone glass panels are distributed on the glossy surface, frosted surface, edge arc surface, inner wall of camera hole and its platform surface, as well as the 3D areas such as the inclined surface and frustum around the platform. It is necessary to use transmitted light and reflected light imaging from multiple angles and directions to detect defects.

[0003] Current mobile phone glass plate inspection equipment requires the part carrying the mobile phone glass plate to enter the camera area together with the mobile phone glass plate during inspection. The camera and light source can only be on the same side of the conveyor belt. The camera can only acquire reflected light images and cannot acquire transmitted light images. It cannot acquire 3D images from multiple angles and all directions. Moreover, the part carrying the mobile phone glass plate enters the image and becomes the image background, which interferes with image processing and recognition.

[0004] Existing technologies can also utilize the gap between conveyor rollers or conveyor belts for imaging. Light sources and cameras can be arranged above and below the glass. However, in this case, the camera and light source can only be installed in the imaging gap. Their installation angle and position are limited by the gap size, roller diameter, etc. When the glass passes through the gap between adjacent conveyor rollers, the difference in surface friction and dimensional errors, radial runout errors, etc. on both sides of the conveyor rollers or conveyor belt can easily cause the glass to move up and down or vibrate, which greatly reduces the image quality. Especially for high-gloss surfaces and 3D sensitive areas, it may cause false detection and missed detection. In order to reduce glass up and down and vibration, the conveying speed usually needs to be reduced, resulting in slow detection speed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mobile phone glass plate appearance defect detection system that can realize all-round scanning detection of mobile phone glass plates, improve image quality and increase detection speed.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a mobile phone glass plate appearance defect detection system is provided, including a frame, a control system, a tray, and a conveying mechanism, multiple cameras, and multiple light sources respectively communicated with the control system. The conveying mechanism is mounted on the frame, and the output end of the conveying mechanism is connected to the tray for placing the mobile phone glass plate. The multiple light sources and multiple cameras are respectively arranged corresponding to the mobile phone glass plate for capturing images of the mobile phone glass plate. The control system is used to detect the images captured by the cameras and display the detection results. The tray has a detection area extending through the top and bottom of the tray, and the detection area has a support part for supporting the mobile phone glass plate. The control system controls the acceleration of the tray to cause the support part and the mobile phone glass plate to generate relative displacement.

[0007] This utility model discloses a mobile phone glass plate appearance defect detection system. In use, the mobile phone glass plate is placed on top of a support within the detection area. A conveyor mechanism transports a tray and the glass plate along with it. Since the detection area extends through the top and bottom of the tray, cameras and light sources can be positioned vertically, horizontally, and vertically along the transport path of the glass plate, significantly expanding the installation freedom of the light sources and cameras. This allows for the acquisition of transmission and reflection images of the mobile phone glass plate, enriching image information. High-density placement of light sources and cameras is possible, and multi-point detection improves detection accuracy. During image capture, the control system can stabilize the transport mechanism, improving image quality and increasing detection speed by controlling the transport speed. Because the contact area between the support and the glass plate causes some obstruction, the control system can also control the acceleration of the tray. Due to inertia, the glass plate shifts relative to the support within the detection area, altering the obstruction. The system utilizes the complementarity of multiple images to avoid imaging dead zones, achieving multi-point, multi-angle, and omnidirectional acquisition of transmission and reflection images of the glass plate. The control system then detects and displays the defect detection results from the acquired images.

[0008] Furthermore, the support includes at least two support rods, the top surfaces of which are located in the same horizontal plane.

[0009] Furthermore, the axial direction of the support rod intersects the conveying direction of the tray at a preset angle.

[0010] Furthermore, the top of the tray is provided with a limiting frame, and the detection area extends vertically through the top of the limiting frame.

[0011] Furthermore, the inner wall of the limiting frame is provided with a limiting tip, and there is space for the mobile phone glass to slide and translate between the limiting tip and the outer periphery of the mobile phone glass plate.

[0012] Furthermore, guide rails are provided on both sides of the top of the frame. The conveying mechanism includes a drive mechanism and conveyor belts respectively mounted on the two guide rails. The control system is communicatively connected to the drive mechanism. The output end of the drive mechanism is drively connected to the conveyor belts. The two ends of the tray are respectively placed on the top of the two conveyor belts. The drive mechanism drives the conveyor belts and the tray to move along the guide rails.

[0013] Furthermore, the conveying mechanism includes a first conveying line, a turning mechanism, and a second conveying line arranged sequentially along the frame. The first conveying line, the turning mechanism, and the second conveying line are respectively communicatively connected to the control system. The first conveying line is used to convey a tray along the length direction of the mobile phone glass plate. The turning mechanism is used to receive the tray conveyed by the first conveying line and convey the tray to the second conveying line. The second conveying line is used to convey the tray along the width direction of the mobile phone glass plate.

[0014] Furthermore, the control system includes a central control computer, a controller, and multiple sub-computers. The sub-computers, the central control computer, the conveying mechanism, the camera, and the light source are respectively communicatively connected to the controller. The sub-computers are used to detect images captured by the camera, and the central control computer is used to fuse and calculate the detection data from multiple sub-computers and display the detection results.

[0015] Furthermore, the rack is also equipped with a position sensor, and the controller is communicatively connected to the position sensor.

[0016] Furthermore, the tray has one, two, or more detection zones.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: the control system can control the conveying mechanism to stably convey the tray and the mobile phone glass plate on it, so that the mobile phone glass plate can move in a plane, improving the image quality. The detection speed can be increased by increasing the conveying speed. The installation freedom of the light source and camera is greatly expanded, and the transmitted and reflected images of the mobile phone glass plate can be obtained, enriching the image information. The light source and camera can be arranged in a high density, and the detection accuracy can be improved by multi-point detection. The acceleration of the tray can be controlled by the control system, so that the mobile phone glass plate can be displaced relative to the support in the detection area. The complementarity of multiple images can be used to avoid the imaging dead zone, so as to realize the acquisition of transmitted and reflected light images of the mobile phone glass plate from multiple points, multiple angles and all directions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the mobile phone glass plate appearance defect detection system in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the tray structure in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the conveying mechanism along the "L"-shaped conveying tray in an embodiment of the present invention; Figure 4 This is a schematic diagram of the conveying mechanism along the "I"-shaped conveying pallet in this embodiment of the present invention; Figure 5 This is a schematic diagram of the conveying mechanism along the "U"-shaped conveying tray in this embodiment of the present invention.

[0019] In the attached diagram: 1-Frame; 11-Guide rail; 2-Conveying mechanism; 21-First conveyor line; 22-Steering mechanism; 23-Second conveyor line; 24-Conveyor belt; 3-Pattern; 31-Support rod; 32-Limit frame; 321-Limit top; 4-Light source; 5-Camera; 6-Position sensor; 7-Mobile phone glass plate; Figures 3 to 5 The arrows in the image indicate the direction of pallet transport. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] Example 1 This embodiment is the first embodiment of a mobile phone glass plate appearance defect detection system, such as... Figure 1As shown, the device includes a frame 1, a control system, a tray 3, a conveying mechanism 2, multiple cameras 5, and multiple light sources 4, all of which are communicatively connected to the control system. The conveying mechanism 2 is mounted on the frame 1, and its output end is connected to the tray 3 for placing the mobile phone glass plate 7. The multiple light sources 4 and multiple cameras 5 are respectively positioned corresponding to the mobile phone glass plate 7 and are used to capture images of the mobile phone glass plate 7. The control system is used to detect the images captured by the cameras 5 and display the detection results. The tray 3 has a detection area that runs through the top and bottom of the tray 3. The detection area has a support part for supporting the mobile phone glass plate 7. The control system controls the acceleration of the tray 3 to make the support part and the mobile phone glass plate 7 generate relative displacement.

[0023] The aforementioned mobile phone glass plate 7 appearance defect detection system, in use, places the mobile phone glass plate 7 on top of the support in the detection area, and transports the tray 3 and the mobile phone glass plate 7 via the conveying mechanism 2. Since the detection area extends through the top and bottom of the tray 3, the camera 5 and light source 4 can be arranged correspondingly above, below, left, and right along the transport path of the mobile phone glass plate 7, significantly expanding the installation freedom of the light source 4 and camera 5. It can acquire transmission and reflection images of the mobile phone glass plate 7, enriching image information. The system allows for high-density arrangement of the light source 4 and camera 5, compressing the imaging journey and imaging time and space, requiring less space, and improving detection accuracy through multi-point detection. During shooting, the control system can... The control conveyor 2 stably conveys the tray 3 and the mobile phone glass plate 7 on it, improving image quality and increasing the detection speed by increasing the conveying speed. Since the contact part between the support and the mobile phone glass plate 7 will cause some obstruction to the mobile phone glass, the control system can also control the acceleration of the tray 3. Due to inertia, the mobile phone glass plate 7 will be displaced relative to the support in the detection area, changing the obstruction part of the mobile phone glass plate 7. The complementarity of multiple images is used to avoid the imaging dead zone, realizing the acquisition of transmission and reflection images of the mobile phone glass plate 7 from multiple points, angles and all directions. The control system uses the acquired images to detect and display the defect detection results.

[0024] like Figure 2 As shown, the support includes at least two support rods 31, with the top surfaces of the two support rods 31 located in the same horizontal plane. By simultaneously supporting the mobile phone glass plate 7 with at least two support rods 31, the stable transport of the mobile phone glass plate 7 is ensured, preventing the mobile phone glass plate 7 from tilting and falling from the detection area during transport.

[0025] The axial direction of the support rod 31 intersects the conveying direction of the tray 3. This ensures that when the acceleration of the conveying mechanism 2 changes while controlling the control system to convey the tray 3, the relative displacement between the mobile phone glass plate 7 and the support rod 31 causes a change in the portion of the support rod 31 that obstructs the mobile phone glass plate 7, thus obtaining an effective complementary image.

[0026] like Figure 2As shown, a limiting frame 32 is provided on the top of the tray 3, and the detection area extends vertically through the top of the limiting frame 32. Specifically, the tray 3 is a high-strength lightweight metal structure or a high-strength carbon fiber structure. The inner wall of the limiting frame 32 is provided with a limiting tip 321, and a space is left between the limiting tip 321 and the outer periphery of the mobile phone glass plate 7 for sliding and translation. This can limit the range of sliding of the mobile phone glass plate 7 within the limiting frame 32 and reduce the obstruction of the imaging part of the mobile phone glass plate 7 by the limiting frame 32.

[0027] like Figure 2 As shown, guide rails 11 are respectively provided on both sides of the top of the frame 1. The conveying mechanism 2 includes a drive mechanism and conveyor belts 24 respectively mounted on the two guide rails 11. The control system is communicatively connected to the drive mechanism, and the output end of the drive mechanism is drively connected to the conveyor belts 24. The two ends of the tray 3 are respectively placed on the top of the two conveyor belts 24. The drive mechanism drives the conveyor belts 24 and the tray 3 to move along the guide rails 11. In implementation, the drive mechanism drives the conveyor belts 24 to move along the guide rails 11, smoothly conveying the tray 3 and the mobile phone glass plate 7 on it, ensuring the imaging quality of the image captured by the camera 5. The control system can control the acceleration change of the tray 3, so that the mobile phone glass plate 7 and the support part of the tray 3 are relatively displaced, which facilitates the camera 5 to obtain complementary images.

[0028] like Figure 1 , Figures 3 to 5 As shown, tray 3 has two detection zones. Mobile phone glass plates 7 can be placed in different detection zones, and two mobile phone glass plates 7 can be transported and detected simultaneously. High-speed, high-precision imaging is completed in one transmission, and the simultaneous detection of two mobile phone glass plates 7 improves the detection speed.

[0029] In this embodiment, the camera 5 can be a line scan camera or an area scan camera; the light source 4 can be a linear LED light source, a line laser light source, an area light source, or a structured light source.

[0030] Example 2 This embodiment is the second embodiment of the mobile phone glass plate appearance defect detection system. This embodiment is similar to the first embodiment, except that, as shown in the following... Figures 3 to 5 As shown, the conveying mechanism 2 includes a first conveying line 21, a turning mechanism 22, and a second conveying line 23 arranged sequentially along the frame 1. The first conveying line 21, the turning mechanism 22, and the second conveying line 23 are respectively connected to the control system. The first conveying line 21 is used to convey the tray 3 along the length direction of the mobile phone glass plate 7. The turning mechanism 22 is used to receive the tray 3 conveyed by the first conveying line 21 and convey the tray 3 to the second conveying line 23. The second conveying line 23 is used to convey the tray 3 along the width direction of the mobile phone glass plate 7.

[0031] The conveying mechanism 2 performs scanning imaging detection in a through-feed manner. Specifically, the first conveyor line 21, the turning mechanism 22, and the second conveyor line 23, arranged sequentially, form an "L" shape. The conveying mechanism 2 conveys the tray 3 along the "L" shape, as shown below. Figure 3 As shown, the first conveyor line 21 carries the tray 3 and completes the longitudinal scanning imaging motion with predetermined acceleration, constant speed and deceleration. The steering mechanism 22 can switch the tray 3 from the longitudinal scanning imaging motion to the transverse scanning imaging motion. During the conveying process, the mobile phone glass plate 7 realizes the overall translational motion. The second conveyor line 23 carries the tray 3 and completes the transverse scanning imaging motion with predetermined acceleration, constant speed and deceleration.

[0032] It should be noted that when the conveying mechanism 2 completes the scanning imaging detection work in a through-feed manner, the first conveying line 21, the turning mechanism 22, and the second conveying line 23, which are arranged sequentially, can also form an "I" shape. The conveying mechanism 2 conveys the tray 3 along the "I" shape, such as... Figure 4 As shown, the first conveyor line 21 carries the tray 3 and completes the longitudinal scanning imaging motion with predetermined acceleration, constant speed and deceleration. The steering mechanism 22 can rotate the tray 3 and the mobile phone glass plate 7 on it by 90 degrees. The camera 5 and the light source 4 can complete the rotational scanning imaging during the rotation of the mobile phone glass plate 7. Then, the second conveyor line 23 carries the tray 3 and completes the lateral scanning imaging motion with predetermined acceleration, constant speed and deceleration.

[0033] It should be noted that the conveying mechanism 2 can also complete the scanning imaging detection work in a loop. In this case, the first conveying line 21, the turning mechanism 22, and the second conveying line 23 arranged in sequence can form a "U" shape. The conveying mechanism 2 conveys the tray 3 along the "U" shape, such as... Figure 5 As shown, the steering mechanism 22 can rotate the tray 3 and the mobile phone glass plate 7 on it by 90 degrees and translate them to the starting point of the second conveyor line 23. The camera 5 and the light source 4 can complete the rotation and translation scanning imaging during the rotation and translation of the mobile phone glass plate 7. The second conveyor line 23 carries the tray 3 and completes the lateral scanning imaging movement with predetermined acceleration, constant speed and deceleration. Since the conveyor mechanism 2 is a loop type, the tray 3 can be easily recycled and reused.

[0034] Example 3 This embodiment is the third embodiment of the mobile phone glass plate appearance defect detection system. This embodiment is similar to Embodiment Two, except that the control system includes a central control computer, a controller, and multiple sub-computers. The sub-computers, the central control computer, the conveyor mechanism 2, the camera 5, and the light source 4 are all communicatively connected to the controller. The sub-computers are used to detect images captured by the camera 5, and the central control computer is used to fuse and calculate the detection data from the multiple sub-computers and display the detection results. Specifically, the frame 1 is also equipped with position sensors 6, and the controller is communicatively connected to the position sensors 6; multiple position sensors 6 are distributed along the conveyor line. During implementation, the controller controls the conveyor mechanism 2 to convey the tray 3 and the mobile phone glass plate 7 on it at a preset speed. When the position sensor 6 detects that the mobile phone glass plate 7 has moved into position, it communicates with the controller. The controller then communicates with the corresponding sub-computer. The sub-computer drives the light source 4 at a predetermined angle and orientation to flash sequentially and illuminate the mobile phone glass plate 7. The camera 5 acquires the reflected or transmitted light images of the mobile phone glass plate 7 from each preset orientation. The controller then sends the images to the corresponding sub-computer. Multiple sub-computers acquire and process images of the mobile phone glass plate 7 at different positions in the detection area in a distributed and parallel manner. The sub-computers then communicate with the central control computer through the controller. The central control computer uses the complementarity of multiple images to make a comprehensive judgment, complete the defect identification, and display the defect detection results.

[0035] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A mobile phone glass plate appearance defect detection system, comprising a frame (1), a control system, a tray (3), and a conveying mechanism (2), multiple cameras (5), and multiple light sources (4) respectively connected to the control system. The conveying mechanism (2) is mounted on the frame (1), and the output end of the conveying mechanism (2) is connected to the tray (3) for placing mobile phone glass plates (7). The multiple light sources (4) and multiple cameras (5) are respectively set corresponding to the mobile phone glass plates (7) for capturing images of the mobile phone glass plates (7). The control system is used to detect the images captured by the cameras (5) and display the detection results. The system is characterized in that... The tray (3) is provided with a detection area that runs through the top and bottom of the tray (3). The detection area is provided with a support for supporting the mobile phone glass plate (7). The control system controls the acceleration of the tray (3) to make the support relative to the mobile phone glass plate (7).

2. The mobile phone glass plate appearance defect detection system according to claim 1, characterized in that, The support includes at least two support rods (31), the top surfaces of which are located in the same horizontal plane.

3. The mobile phone glass plate appearance defect detection system according to claim 2, characterized in that, The axial direction of the support rod (31) intersects the conveying direction of the tray (3) at a preset angle.

4. The mobile phone glass plate appearance defect detection system according to claim 1, characterized in that, The top of the tray (3) is provided with a limiting frame (32), and the detection area extends vertically through the top of the limiting frame (32).

5. The mobile phone glass plate appearance defect detection system according to claim 4, characterized in that, The inner wall of the limiting frame (32) is provided with a limiting tip (321), and there is space for the mobile phone glass plate (7) to slide and translate between the limiting tip (321) and the outer periphery of the mobile phone glass plate (7).

6. The mobile phone glass plate appearance defect detection system according to claim 1, characterized in that, The top two sides of the frame (1) are respectively provided with guide rails (11). The conveying mechanism (2) includes a drive mechanism and conveyor belts (24) respectively installed on the two guide rails (11). The control system is communicatively connected to the drive mechanism. The output end of the drive mechanism is drively connected to the conveyor belts (24). The two ends of the tray (3) are respectively placed on the top of the two conveyor belts (24). The drive mechanism drives the conveyor belts (24) and the tray (3) to move along the guide rails (11).

7. The mobile phone glass plate appearance defect detection system according to claim 1, characterized in that, The conveying mechanism (2) includes a first conveying line (21), a turning mechanism (22), and a second conveying line (23) arranged sequentially along the frame (1). The first conveying line (21), the turning mechanism (22), and the second conveying line (23) are respectively connected to the control system. The first conveying line (21) is used to convey the tray (3) along the length direction of the mobile phone glass plate (7). The turning mechanism (22) is used to receive the tray (3) conveyed by the first conveying line (21) and convey the tray (3) to the second conveying line (23). The second conveying line (23) is used to convey the tray (3) along the width direction of the mobile phone glass plate (7).

8. The mobile phone glass plate appearance defect detection system according to any one of claims 1 to 7, characterized in that, The control system includes a central control computer, a controller, and multiple sub-computers. The sub-computers, the central control computer, the conveying mechanism (2), the camera (5), and the light source (4) are respectively connected to the controller. The sub-computers are used to detect the images captured by the camera (5), and the central control computer is used to fuse and calculate the detection data of multiple sub-computers and display the detection results.

9. The mobile phone glass plate appearance defect detection system according to claim 8, characterized in that, The frame (1) is also equipped with a position sensor (6), and the controller is communicatively connected to the position sensor (6).

10. The mobile phone glass plate appearance defect detection system according to any one of claims 1 to 7, characterized in that, The tray (3) has one, two or more detection zones.

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