A screen vision detection device

Abstract

The utility model discloses a kind of screen visual inspection equipment, it is related to screen detection equipment technical field, including initial alignment vision mechanism, feeding handling mechanism, fine positioning camera mechanism, manipulator pick-and-place mechanism, fixture mechanism and AOI vision inspection mechanism.The utility model is positioned by the secondary positioning cooperation of initial alignment vision mechanism and fine positioning camera mechanism, combined with the accurate adjustment of manipulator pick-and-place mechanism, ensure that screen product and the probe pressure head of fixture mechanism are accurately positioned, substantially reduce the detection error caused by positioning deviation, ten sets of fixture mechanism are arranged in parallel to realize parallel operation, and product detection platform can be adapted to different size screen, loading suction cup assembly can be adjusted horizontally, AOI vision inspection mechanism moves detection camera by the aid of X-axis transverse sliding table and Y-axis longitudinal sliding table, can accurately detect screen defect, while picture and AOI detection sequence can be switched according to screen characteristics, adapt to different types screen detection demand, significantly improve detection efficiency and quality stability.

Description

Technical Field

[0001] This utility model relates to the field of screen inspection equipment technology, specifically a screen visual inspection device. Background Technology

[0002] In the field of automated inspection of precision products, the positioning accuracy of the product and the synergy of the inspection process directly affect the inspection quality and efficiency. In the existing process, the process from product feeding to inspection involves multiple handling and positioning. However, the connection between initial positioning and fine positioning lacks an efficient visual guidance and data feedback mechanism. This causes the robot arm to be prone to positional deviations when picking up and placing products, which affects the precise pressing of the fixture head and the power-on operation of the probe, thereby reducing the accuracy of AOI inspection. At the same time, in the cyclic operation of multi-stations on the fixture platform (such as fixtures 1-10), the timing of product placement and the picking up and placing of inspected products is fixed. It is difficult to flexibly adjust the order of AOI inspection and fixture screen printing according to the characteristics of different products, resulting in insufficient process adaptability.

[0003] In production line changeover scenarios, the fixture calibration process for different product models is complex and has limited accuracy. In traditional changeovers, fixture positioning relies on manual adjustment or single-camera shooting. It is impossible to achieve accurate identification and data fusion of Mark points through the joint processing of multiple cameras (such as a precision positioning camera and a fixture positioning vision module). This results in insufficient positional accuracy of the robot arm placing the product at the fixture probe, requiring repeated adjustments to meet the testing requirements, which seriously affects changeover efficiency and the flexibility of the production line.

[0004] Furthermore, the lack of unified standards in the implementation of product quality standards, such as blunting and deburring of sharp angles, surface cleanliness, and dimensional tolerances (e.g., thickness tolerances, perpendicularity, circular runout, etc., which are manufactured according to specific standards), can easily lead to poor quality consistency between different batches of products if there is no clear basis for automated inspection and control. This increases redundant steps in subsequent inspections. At the same time, the marking of important dimensions and the focus of inspection in the existing process have not formed a linkage mechanism with automated equipment, making it difficult to identify key defects in a targeted manner through AOI inspection, thus affecting the effectiveness of inspection. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a screen visual inspection device to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a screen visual inspection device, comprising:

[0007] The main body serves as the foundation for the overall installation of the equipment;

[0008] The infeed and outfeed assembly line includes an infeed conveyor assembly and an outfeed conveyor assembly, used to transport screen products to be inspected and screen products that have already been inspected;

[0009] Specifically, the feeding and discharging assembly line also includes a fixed frame, a motor, and a speed controller. Both the feeding conveyor and the discharging conveyor are mounted on the fixed frame. The motor provides power for the operation of the feeding and discharging conveyors, and the speed controller is used to adjust the conveying speed.

[0010] The initial alignment vision mechanism is located above the conveying path of the feeding conveyor assembly and is used to take an initial picture of the screen product to be inspected to obtain initial position information.

[0011] The initial alignment vision mechanism includes a support frame, an initial positioning camera, and a light plate. Both the initial positioning camera and the light plate are mounted on the support frame, and the light plate is used to provide light for the initial positioning camera to take pictures.

[0012] The feeding and conveying mechanism is located at one end below the initial alignment vision mechanism and away from the starting end of the feeding and conveying component. It is used to transport the screen product to be inspected after initial alignment to the positioning platform.

[0013] The precision positioning camera mechanism is located between the positioning platform and the robotic arm loading and unloading mechanism. It is used to take a second picture of the screen product to be tested on the positioning platform to achieve precise positioning.

[0014] The robotic arm picking and placing mechanism is installed on the base plate inside the main body. It is used to pick up and move the screen products to be inspected according to the positioning information of the precision positioning camera mechanism, and to transfer the inspected screen products to the discharge conveyor assembly.

[0015] The robotic arm material handling mechanism includes a transverse axis assembly, a four-axis robotic arm, and a handling fixture mechanism;

[0016] The transverse axis assembly is slidably connected inside the main body and is used to support the four-axis robotic arm to move laterally. The pick-and-place fixture mechanism is set at the execution end of the four-axis robotic arm.

[0017] The pick-and-place clamping mechanism includes a rotary connection assembly, a feeding suction cup assembly, and a discharging suction cup assembly. The pick-and-place clamping mechanism is connected to the execution end of the four-axis robotic arm through the rotary connection assembly and plays the role of rotating to pick up and place materials.

[0018] The feeding suction cup assembly and the unloading suction cup assembly are respectively located below the rotating connecting assembly. The cylinder installed on the rotating connecting assembly can be tilted back and forth alternately to adjust the feeding suction cup assembly and the unloading suction cup assembly. The feeding suction cup assembly can also be adjusted horizontally according to the size of different screen products.

[0019] The fixture mechanism consists of multiple sets arranged in parallel. Each set of fixture mechanisms includes a product testing platform, a first pressing cylinder, a second pressing cylinder, a probe pressing head, and a test board. The first and second pressing cylinders can drive the probe pressing head to press down and contact the screen product and power it on. The test board is used to perform screen refresh operations on the screen product.

[0020] The fixture mechanism is arranged in ten groups. The product testing platform of each group of fixture mechanisms can adapt to screen products of different sizes. Screen products of - 1 inch can be placed on the left or right side, while larger screen products can be placed on one side with the excess part attached to the product testing platform next to it.

[0021] An AOI visual inspection mechanism is located above multiple sets of fixture mechanisms and is used to inspect screen products on the fixture mechanisms. The order of screen scanning and AOI inspection can be switched according to the characteristics of the screen products.

[0022] An AOI visual inspection mechanism includes an X-axis transverse slide, a Y-axis longitudinal slide, and a positioning camera;

[0023] The X-axis transverse slide and Y-axis longitudinal slide of the AOI visual inspection mechanism can drive the AOI inspection camera and positioning camera to move. The positioning camera is used to capture the Mark points on the fixture mechanism.

[0024] In summary, this utility model has the following beneficial effects: Through the secondary positioning cooperation of the initial alignment vision mechanism and the fine positioning camera mechanism, combined with the precise adjustment of the robotic arm's material handling mechanism, this utility model ensures accurate alignment of the probe pressure head of the screen product and the fixture mechanism, significantly reducing detection errors caused by positioning deviations. Ten sets of fixture mechanisms are arranged in parallel to achieve parallel operation, and the product inspection platform can adapt to screens of different sizes. The feeding suction cup assembly can be adjusted laterally, improving the equipment's adaptability to products of various specifications. The AOI vision inspection mechanism uses the X-axis horizontal sliding table and the Y-axis vertical sliding table to drive the inspection camera movement, combined with the positioning camera to identify Mark points, enabling accurate detection of screen defects. Simultaneously, the screen refresh and AOI inspection sequence can be switched according to screen characteristics, adapting to the inspection needs of different types of screens, significantly improving inspection efficiency and quality stability, and reducing manual intervention and costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a first-view schematic diagram of the internal structure of this utility model;

[0027] Figure 3 This is a second-view schematic diagram of the internal structure of this utility model;

[0028] Figure 4This is a top view of the entire utility model;

[0029] Figure 5 This is an enlarged view of the structure of the material feeding and discharging assembly line of this utility model;

[0030] Figure 6 This is an enlarged view of the initial alignment vision mechanism of this utility model;

[0031] Figure 7 This is an enlarged view of the structure of the robotic arm material handling mechanism of this utility model;

[0032] Figure 8 This is an enlarged view of the structure of the pick-and-place clamp mechanism of this utility model;

[0033] Figure 9 This is an enlarged view of the structure of the fixture mechanism of this utility model;

[0034] Figure 10 This is an enlarged view of the AOI visual inspection mechanism of this utility model.

[0035] In the diagram: 1. Main body; 2. Feeding and discharging assembly line; 201. Fixed frame; 202. Feeding conveyor assembly; 203. Discharging conveyor assembly; 204. Motor; 205. Speed ​​controller; 3. Initial alignment vision mechanism; 301. Support frame; 302. Initial positioning camera; 303. Surface plate; 4. Feeding and handling mechanism; 5. Robotic arm picking and placing mechanism; 501. Transverse axis assembly; 502. Four-axis robotic arm; 503. Picking and placing fixture Mechanism; 504, Rotary connection assembly; 505, Loading suction cup assembly; 506, Unloading suction cup assembly; 6, Fixture mechanism; 601, Product inspection platform; 602, First pressing cylinder; 603, Second pressing cylinder; 604, Probe indenter; 605, Test plate; 7, AOI visual inspection mechanism; 701, X-axis transverse slide; 702, Y-axis longitudinal slide; 703, Positioning camera; 704, AOI inspection camera. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The embodiments of this utility model will be described below based on its overall structure.

[0038] Example 1

[0039] like Figure 1-10 As shown, the screen visual inspection device in this embodiment achieves automated visual inspection of screen products through multi-level positioning and multi-mechanism collaboration. The specific structure is as follows:

[0040] Main body 1: Serving as the overall installation foundation for the equipment, it adopts a frame structure to provide stable support for each functional mechanism;

[0041] Feeding / Discharging Production Line 2:

[0042] It includes a fixed frame 201, a feeding conveyor assembly 202, a discharging conveyor assembly 203, a motor 204, and a speed controller 205;

[0043] Both the feeding conveyor assembly 202 and the discharging conveyor assembly 203 are mounted on the fixed frame 201 and are used to convey the screen products to be tested and the screen products that have been tested, respectively.

[0044] Motor 204 provides power for the operation of feeding conveying assembly 202 and discharging conveying assembly 203, and speed regulator 205 is used to adjust the conveying speed to adapt to different detection rhythms.

[0045] Initial alignment visual mechanism 3:

[0046] Located above the conveying path of the feeding conveyor assembly 202, it includes a support frame 301, a preliminary positioning camera 302, and a surface plate 303;

[0047] Both the initial positioning camera 302 and the surface light plate 303 are mounted on the support frame 301. The surface light plate 303 is used to provide light for the initial positioning camera 302 to take pictures. The initial positioning camera 302 takes the initial picture of the screen product to be inspected to obtain the initial position information.

[0048] Feeding and conveying mechanism 4: Located at one end below the initial alignment vision mechanism 3 and away from the starting end of the feeding and conveying assembly 202, it is used to transport the screen product to be inspected after initial alignment to the positioning platform.

[0049] Precision positioning camera mechanism: Located between the positioning platform and the robotic arm material handling mechanism 5, it is used to take a second picture of the screen product to be tested on the positioning platform to achieve precise positioning.

[0050] Robotic arm material handling mechanism 5

[0051] Mounted on the inner base plate of the main body 1, including a transverse axis assembly 501, a four-axis robotic arm 502, and a pick-and-place fixture mechanism 503;

[0052] The transverse axis assembly 501 is slidably connected inside the main body 1 and is used to support the four-axis robotic arm 502 for lateral movement.

[0053] The pick-and-place clamp mechanism 503 includes a rotary connection assembly 504, a loading suction cup assembly 505, and a unloading suction cup assembly 506;

[0054] The pick-and-place clamp mechanism 503 is connected to the execution end of the four-axis robotic arm 502 via a rotary connection assembly 504, and plays the role of rotating to pick up and place materials.

[0055] The feeding suction cup assembly 505 and the unloading suction cup assembly 506 are respectively located below the rotary connecting assembly 504. The feeding suction cup assembly 505 and the unloading suction cup assembly 506 can be adjusted back and forth alternately by a cylinder that is tilted on the rotary connecting assembly 504. The feeding suction cup assembly 505 can be adjusted horizontally according to the size of different screen products.

[0056] The robotic arm picking and placing mechanism 5 is used to pick up and transport the screen products to be inspected and transfer the inspected screen products to the discharge conveying component 203 based on the positioning information of the precision positioning camera mechanism.

[0057] Fixture mechanism 6

[0058] The fixture mechanism 6 is provided in multiple groups arranged in parallel. In this embodiment, there are ten groups. Each group of fixture mechanisms 6 includes a product testing platform 601, a first pressing cylinder 602, a second pressing cylinder 603, a probe indenter 604, and a test plate 605.

[0059] The first pressing cylinder 602 and the second pressing cylinder 603 can drive the probe pressing head 604 to press down and contact the screen product and power it on. The test board 605 is used to perform screen refresh operation on the screen product.

[0060] Each set of fixture mechanisms 6 product testing platform 601 can adapt to screen products of different sizes. Screen products of 1-3.5 inches can be placed on the left and right sides, while larger screen products can be placed on one side with the excess part attached to the adjacent product testing platform 601.

[0061] AOI visual inspection agency 7

[0062] Located above multiple sets of fixture mechanisms 6, it includes an X-axis transverse slide 701, a Y-axis longitudinal slide 702, and a positioning camera 703;

[0063] The X-axis transverse slide 701 and Y-axis longitudinal slide 702 of the AOI visual inspection mechanism 7 can drive the AOI inspection camera 704 and the positioning camera 703 to move. The positioning camera 703 is used to capture the Mark points on the fixture mechanism 6.

[0064] The AOI visual inspection mechanism 7 is used to inspect the screen products on the fixture mechanism 6, and the order of screen scanning and AOI inspection can be switched according to the characteristics of the screen products.

[0065] The working principle of this utility model is as follows: Based on automated production lines and multi-module collaborative control, this utility model achieves efficient product testing through closed-loop linkage of visual positioning, robotic arm operation, fixture detection, and line change calibration. The specific working principle is as follows:

[0066] In the normal working mode, the system completes product inspection in a cyclic process: First, the feeding conveyor component 202 conveys the incoming material, and the initial positioning camera 302 of the initial alignment vision mechanism 3 takes pictures of the incoming material to obtain initial position information.

[0067] The feeding and handling mechanism 4 transports the incoming product to the positioning platform. After the product is sucked up, the visual precision positioning camera takes a second picture to accurately identify the product position and makes the robotic arm picking and placing mechanism 5 adjust its posture to accurately pick up the product.

[0068] Then, the four-axis robotic arm 502 of the robotic arm picking and placing mechanism 5 picks up the product based on this information. Before picking up the product, it has been photographed and positioned twice by the precision positioning camera mechanism to accurately identify the product position and adjust its posture.

[0069] Subsequently, the four-axis robotic arm 502 carries the product to the fixture mechanism 6, which is arranged in ten groups. At this time, the unloading suction cup assembly 506 first picks up and extracts the product that has been inspected, that is, it first removes the product that has been inspected, and then places the product to be inspected into one of the fixture mechanisms 6 by the suction cup assembly 505 adsorbing it.

[0070] The corresponding first pressing cylinder 602 or the second pressing cylinder 603 drives the probe pressing head 604 to press down and contact the product and power it on. Simultaneously, the test board 605 performs the screen refresh operation on the product. Then, the AOI visual inspection mechanism 7 (including AOI inspection camera 704, X-axis horizontal slide 701, and Y-axis vertical slide 702) completes the inspection (the order of screen refresh and AOI inspection can be switched according to the product characteristics).

[0071] Finally, the four-axis robotic arm 502 transfers the inspected product to the discharge conveyor assembly 203, and the process is repeated.

[0072] The line change calibration mode is used to adapt to different product models and ensure detection accuracy: the robotic arm picking and placing mechanism 5 carries the product to the top of the precision positioning camera to take a picture and obtain the product's reference position. The robotic arm picking and placing mechanism 5 obtains the product's reference position and carries the product to one of the fixture mechanisms 6.

[0073] At the same time, the X-axis transverse slide 701 drives the AOI inspection camera 704 to move above each fixture mechanism 6 to capture the Mark points on the fixture mechanism 6;

[0074] The vision software performs joint analysis and processing of the shooting results of the two sets of cameras, generates position compensation data and feeds it back to the robotic arm picking and placing mechanism 5. The robotic arm picking and placing mechanism 5 adjusts its actions according to the data, accurately places the product at the probe pressure head 604 of the fixture mechanism 6 and completes the lighting operation. The above steps are repeated sequentially for fixture mechanisms 6 from 1 to 10 to complete the line change calibration.

[0075] Furthermore, the loading suction cup assembly 505 will adjust its lateral position according to the screen size of different products. At the same time, the loading suction cup assembly 505 and the unloading suction cup assembly 506 are connected to the end of the rotary connecting assembly 504 by an inclined cylinder. The loading suction cup assembly 505 and the unloading suction cup assembly 506 can be adjusted back and forth alternately by the extension and retraction of the cylinder. That is, when the cylinder extends, the height of the unloading suction cup assembly 506 is lower than the height of the loading suction cup assembly 505 and the front end of the unloading suction cup assembly 506 is further forward. When the cylinder retracts, the height of the unloading suction cup assembly 506 is higher than the height of the loading suction cup assembly 505 and the front end of the unloading suction cup assembly 506 is further backward. This can control the extension and retraction of the cylinder to ensure that the two sides do not affect each other when the robotic arm picks up or unloads materials.

[0076] Furthermore, a fixture mechanism 6 includes two probe indenters 604, which can test two products simultaneously;

[0077] The probe indenters 604 of the fixture mechanism 6 are divided into two groups, left and right. Products with a size of 1-3.5 inches are placed on the left and right sides, while larger products are placed on one side. The excess part is attached to the product testing platform 601 placed next to it. The first pressing cylinder 602 and the second pressing cylinder 603 drive the probe indenters 604 to press the corresponding probe indenters 604 of the product after the positional accuracy brought by the robotic arm picking and placing mechanism 5 has been corrected. Then the product testing stage can begin. After the test is completed, the first pressing cylinder 602 or the second pressing cylinder 603 is retracted, and the product can be removed by the robotic arm picking and placing mechanism 5.

[0078] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A screen visual inspection device, characterized in that, include: Main body (1), which serves as the foundation for the overall installation of the equipment; The infeed and outfeed assembly line (2) includes an infeed conveyor assembly (202) and an outfeed conveyor assembly (203) for conveying screen products to be tested and screen products that have been tested; The initial alignment vision mechanism (3) is located above the conveying path of the feeding conveyor assembly (202) and is used to take an initial picture of the screen product to be inspected to obtain initial position information. The feeding and handling mechanism (4) is located at one end below the initial alignment vision mechanism (3) and away from the starting end of the feeding and conveying assembly (202), and is used to transport the screen product to be inspected after initial alignment to the positioning platform. The precision positioning camera mechanism is located between the positioning platform and the robotic arm material handling mechanism (5) to take a second photo of the screen product to be tested on the positioning platform in order to achieve precise positioning. The robotic arm picking and placing mechanism (5) is installed on the inner bottom plate of the main body (1) and is used to pick up and transport the screen products to be inspected according to the positioning information of the precision positioning camera mechanism and to transfer the inspected screen products to the discharge conveying component (203). The fixture mechanism (6) is provided in multiple sets arranged in parallel. Each set of fixture mechanism (6) includes a product testing platform (601), a first pressing cylinder (602), a second pressing cylinder (603), a probe pressing head (604), and a test board (605). The first pressing cylinder (602) and the second pressing cylinder (603) can drive the probe pressing head (604) to press down and contact the screen product and power it on. The test board (605) is used to perform screen refresh operation on the screen product. An AOI visual inspection mechanism (7) is located above multiple fixture mechanisms (6) and is used to inspect the screen products on the fixture mechanism (6). The order of screen scanning and AOI inspection can be switched according to the characteristics of the screen products.

2. The screen visual inspection device according to claim 1, characterized in that: The feed and discharge assembly line (2) also includes a fixed frame (201), a motor (204) and a speed controller (205), and the feed conveying assembly (202) and the discharge conveying assembly (203) are both installed on the fixed frame (201); The motor (204) provides power for the operation of the feeding conveyor assembly (202) and the discharging conveyor assembly (203), and the speed regulator (205) is used to adjust the conveying speed.

3. The screen visual inspection device according to claim 1, characterized in that: The initial alignment vision mechanism (3) includes a support frame (301), an initial positioning camera (302), and a surface light plate (303), both of which are mounted on the support frame (301). The light plate (303) is used to provide light for the initial positioning camera (302) to take pictures.

4. The screen visual inspection device according to claim 1, characterized in that: The robotic arm material handling mechanism (5) includes a transverse axis assembly (501), a four-axis robotic arm (502), and a handling fixture mechanism (503); The transverse axis assembly (501) is slidably connected inside the main body (1) and is used to support the four-axis robotic arm (502) to move laterally. The pick-and-place clamp mechanism (503) is set at the execution end of the four-axis robotic arm (502).

5. The screen visual inspection device according to claim 4, characterized in that: The pick-and-place clamping mechanism (503) includes a rotary connection assembly (504), a feeding suction cup assembly (505), and a discharging suction cup assembly (506). The pick-and-place clamping mechanism (503) is connected to the execution end of the four-axis robotic arm (502) through the rotary connection assembly (504) and plays the role of rotating to pick up and place materials. The feeding suction cup assembly (505) and the unloading suction cup assembly (506) are respectively located below the rotary connecting assembly (504). The feeding suction cup assembly (505) and the unloading suction cup assembly (506) can be adjusted back and forth alternately by a cylinder installed on the rotary connecting assembly (504). The feeding suction cup assembly (505) can be adjusted horizontally according to the size of different screen products.

6. The screen visual inspection device according to claim 1, characterized in that: The fixture mechanisms (6) are arranged in ten groups. The product testing platform (601) of each group of fixture mechanisms (6) can adapt to screen products of different sizes. Screen products of 1-3.5 inches can be placed on the left and right sides, while larger screen products can be placed on one side and the excess part can be attached to the adjacent product testing platform (601).

7. The screen visual inspection device according to claim 1, characterized in that: The AOI visual inspection mechanism (7) includes an X-axis transverse slide (701), a Y-axis longitudinal slide (702), and a positioning camera (703); The X-axis transverse slide (701) and Y-axis longitudinal slide (702) of the AOI visual inspection mechanism (7) can drive the AOI inspection camera (704) and positioning camera (703) to move. The positioning camera (703) is used to capture the Mark points on the fixture mechanism (6).

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