An on-line measuring device for liquid crystal substrate glass warping image

Abstract

The application provides an online measurement device for a liquid crystal substrate glass warping image, which comprises a roller conveying assembly, a supporting assembly for lifting the liquid crystal substrate glass is arranged on the side of the roller conveying assembly, a second calibration assembly is arranged on the side of the roller conveying assembly, the second calibration assembly comprises an infrared sensor, an image measurement assembly is arranged on the side of the roller conveying assembly, the image measurement assembly comprises a protective cover, a lattice plate and a camera, the infrared sensor and the camera are connected with a PLC control system, the infrared sensor is used for detecting that the liquid crystal substrate glass reaches a predetermined position, then the camera is controlled by the PLC control system to take a picture, and a reflection image reflected to the surface of the liquid crystal substrate glass by the lattice plate is acquired, the PLC control system is used for comparing and judging whether the acquired image warping quality is qualified, the PLC control system is connected with a DSC system, and the DSC system is connected with a display terminal. The application can realize automatic full detection, reduce manual work and improve the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal substrate glass processing technology, specifically to an online measurement device for the warpage image of liquid crystal substrate glass. Background Technology

[0002] After the molten glass flows out of the overflow brick tip through the overflow pull method, the molten glass is pulled out of the glass plate after being formed and annealed. At the same time, the warped image of the glass plate is formed in this process. Personnel need to adjust the equipment and forming process to ensure that the quality of the warped image is within the corresponding grade range. The warped image detected by online automation is digitally managed.

[0003] However, during the production process, the warpage quality of glass sheets during periodic sampling inspections by the testing department is subject to uncontrollable factors. Furthermore, the time intervals between sampling inspections lead to incomplete warpage quality control. Currently, the overflow pull-down method uses relatively large muffle furnaces, increasing the melting and extraction volume. The hourly output of the G7.5 LCD substrate glass production line (0.5T) has also increased, necessitating the use of a full-inspection device to manage warpage quality. However, full-inspection requires manual inspection of each sheet individually, resulting in low efficiency and a large workload. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an online measurement device for the warping image of a liquid crystal substrate glass, which can solve the existing problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The present invention is achieved through the following technical solution: an online measurement device for the warping image of a liquid crystal substrate glass, comprising a roller conveying assembly, wherein the side of the roller conveying assembly is provided with a support assembly for lifting the liquid crystal substrate glass; the side of the roller conveying assembly is provided with a second calibration assembly, wherein the second calibration assembly includes an infrared sensor.

[0007] The roller conveying assembly has an image measurement component on its side, which includes a protective cover, a grid plate, and a camera. The grid plate is located inside the protective cover, and the camera is located at the center of the side of the grid plate. The infrared sensor and the camera are connected to the PLC control system. The infrared sensor is used to detect when the liquid crystal substrate glass reaches a predetermined position, and then the PLC control system controls the camera to take a picture to obtain the reflected image of the grid plate onto the surface of the liquid crystal substrate glass. The PLC control system is used to compare the acquired image to determine whether the warpage quality of the acquired image is qualified. The PLC control system is connected to the DSC system, and the DSC system is connected to the display terminal.

[0008] Furthermore, the supporting assembly includes a cylinder, a connecting rod, and a support rod. The roller conveying assembly has a support rod between the rollers, and both ends of the support rod are connected to the connecting rod. The side of the connecting rod is connected to the cylinder, and the other end of the cylinder is connected to a protective cover.

[0009] Furthermore, the image measurement component also includes a light-shielding curtain, a light intensity sensor, and a supplementary light. The protective cover has light-shielding curtains at both ends of the opening, and multiple parallel supplementary lights are installed inside the protective cover. The protective cover is equipped with a light intensity sensor, and the light intensity sensor and the supplementary lights are connected to a PLC control system.

[0010] Furthermore, the grid board is divided into several small squares by horizontally and vertically arranged black lines, the size of which is 50mm*50mm; the width of the black lines is 10nm.

[0011] Furthermore, the grid plate is parallel to the support rod, and the camera can be started when the support rod is raised by a cylinder to a distance of 2.5m from the grid plate.

[0012] Furthermore, the second calibration component also includes an arc-shaped plate, a plug rod, a sleeve rod, and a spring. The sleeve rod is fixed to the side of the roller conveying component, and the plug rod is inserted into the inside of the sleeve rod. A spring is provided between the plug rod and the sleeve rod. An infrared sensor is provided on one side of the plug rod. An arc-shaped plate is provided on the side of the plug rod.

[0013] Furthermore, the arc-shaped plate adopts a curved blade structure, and the bottom of the arc-shaped plate is higher than the top of the roller conveying assembly; the protruding surface of the arc-shaped plate is aligned with the input end of the roller conveying assembly, and the second calibration assembly is disposed between the rollers of the roller conveying assembly.

[0014] Furthermore, it also includes a first calibration component, which includes a motor, a side baffle, an extended baffle, a nut, and a lead screw. The lead screw is rotatably connected to the side of the roller conveying component, and one end of the lead screw is connected to the motor. The side of the lead screw is provided with two nuts, and the motor drives the lead screw to rotate, thereby causing the two nuts to move closer or further apart. Each nut is fixed to the side of a side baffle, and the side of the side baffle is provided with a pulley. The end of the side baffle is rotatably connected to the extended baffle.

[0015] Furthermore, it also includes a size measuring component for measuring the size of the liquid crystal substrate glass; the size measuring component includes a right-angle plate, a measuring table, a laser rangefinder, and a slide groove; the measuring table has a right-angle plate on its side, and a slide groove is formed on the opposite side surface of the right-angle plate; the slide groove is slidably connected to the laser rangefinder; the laser rangefinder is connected to a PLC control system.

[0016] Compared with the prior art, the beneficial effects of the present invention include:

[0017] This invention detects the warpage of liquid crystal substrate glass by capturing its reflected image with a camera once the glass reaches the appropriate position during transport. The invention also avoids affecting detection accuracy by lifting the liquid crystal substrate glass during transport; furthermore, it enables automated full inspection, reducing manual labor and improving inspection efficiency.

[0018] During detection, this invention combines infrared sensing technology with the size of the liquid crystal substrate glass to ensure that the liquid crystal substrate glass under test is always directly below the camera, thereby ensuring more accurate images and more precise detection results.

[0019] The present invention can also adjust the light according to the ambient light to ensure that the image is clearer. Attached Figure Description

[0020] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of an online measurement device for the warping image of a liquid crystal substrate glass according to the present invention.

[0022] Figure 2 This is a schematic diagram of the internal structure of the image measurement component in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the side structure of the first calibration component in an embodiment of the present invention;

[0024] Figure 4 Examples of embodiments of the present invention Figure 3 Enlarged structural diagram at point A;

[0025] Figure 5 This is a block diagram illustrating the measurement principle of an embodiment of the present invention;

[0026] Figure 6 These are images of qualified and unqualified liquid crystal substrate glass obtained in the embodiments of the present invention.

[0027] The diagram is labeled as follows: 1. Image measurement component; 11. Protective cover; 12. Grid plate; 13. Blackout curtain; 14. Light intensity sensor; 15. Fill light; 16. Camera; 2. Size measurement component; 21. Right angle plate; 22. Measuring table; 23. Laser rangefinder; 24. Slide rail; 3. LCD substrate glass; 4. First calibration component; 41. Motor; 42. Side baffle; 43. Extended baffle; 44. Nut; 45. Lead screw; 5. Roller conveyor component; 6. Second calibration component; 61. Arc plate; 62. Infrared sensor; 63. Insert rod; 64. Sleeve rod; 65. Spring; 7. Support component; 71. Cylinder; 72. Connecting rod; 73. Support rod. Detailed Implementation

[0028] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0029] An online measurement device for measuring the warped image of a liquid crystal substrate glass includes a size measurement component 2. The size measurement component 2 measures the dimensions of the liquid crystal substrate glass 3 to be inspected, preparing it for subsequent inspection by positioning it directly below a camera 16. Specifically, the size measurement component 2 includes a right-angle plate 21, a measuring table 22, a laser rangefinder 23, and a sliding groove 24. The measuring table 22 has the right-angle plate 21 on its side, and the opposite side surface of the right-angle plate 21 has a sliding groove 24. The sliding groove 24 slidably connects to the laser rangefinder 23. The laser rangefinder 23 is connected to a PLC control system. When measuring the dimensions of the liquid crystal substrate glass 3, one right angle of the glass is placed within the right-angle plate 21, and then the length and width of the liquid crystal substrate glass 3 are measured by sliding the laser rangefinder 23 to obtain the dimensions of the liquid crystal substrate glass.

[0030] The side of the size measuring component 2 is provided with a roller conveyor component 5. The roller conveyor component 5 is a roller conveyor belt, which is existing technology. The roller conveyor component 5 is used to transport the liquid crystal substrate glass 3 to be processed. The side of the roller conveyor component 5 is provided with a support component 7 for lifting the liquid crystal substrate glass 3. The support component 7 is used to lift the liquid crystal substrate glass 3, moving it away from the roller conveyor component 5 and keeping it at a distance of about 2.5 meters from the camera 16, so as to capture the best reflective image. Component 7 includes a cylinder 71, a connecting rod 72, and a support rod 73. The roller conveying assembly 5 has multiple support rods 73 distributed between the rollers. Both ends of the support rod 73 are connected to the connecting rod 72. The cylinder 71 is connected to the side of the connecting rod 72, and the other end of the cylinder 71 is connected to the image measuring assembly 1. After the liquid crystal substrate glass 3 moves onto the support assembly 7 and reaches the appropriate position, the cylinder 71 is activated, which drives the multiple support rods 73 to rise, thereby raising the liquid crystal substrate glass 3.

[0031] In order to calibrate the position of the liquid crystal substrate glass 3 to be tested and ensure that the liquid crystal substrate glass 3 is neatly positioned directly below the camera 16 for measurement, the present invention also provides a first calibration component 4 and a second calibration component 6. The first calibration component 4 is used to calibrate the liquid crystal substrate glass 3 during transport to prevent the liquid crystal substrate glass 3 from deflecting during transport, and the second calibration component 6 is used to calibrate the position of the liquid crystal substrate glass 3 on the support component 7 to ensure that the liquid crystal substrate glass 3 is directly below the camera 16.

[0032] Specifically, the first calibration component 4 includes a motor 41, a side baffle 42, an extension baffle 43, a nut 44, and a lead screw 45, as shown below. Figure 1 and Figure 3 As shown, the lead screw 45 is rotatably connected to the side of the roller conveying assembly 5, and one end of the lead screw 45 is connected to the motor 41; the side of the lead screw 45 is provided with two nuts 44, and the motor 41 drives the lead screw 45 to rotate, thereby driving the two nuts 44 to move closer or further apart; each nut 44 is fixed with a side baffle 42, and the side of the side baffle 42 is provided with a pulley; the end of the side baffle 42 is rotatably connected to an extension baffle 43. When the motor 41 starts, the lead screw 45 drives the two nuts 44 to move closer or further apart, so that the two side baffles 42 move closer or further apart, so that the liquid crystal substrate glass 3 is positioned between the two side baffles 42. The end of the side baffle 42 is rotatably connected to an extension baffle 43, which is located at the top of the support assembly 7. The extension baffle 43 calibrates the position of the liquid crystal substrate glass 3 entering the support assembly 7, and rotates to adapt to the rise of the support assembly 7 when the support assembly 7 rises. When the support assembly 7 resets, the extension baffle 43 resets synchronously.

[0033] The roller conveying assembly 5 has a second calibration assembly 6 on its side. The second calibration assembly 6 includes an infrared sensor 62, which measures the position of the liquid crystal substrate glass upon reaching the support assembly 7, so that the liquid crystal substrate glass 3 is directly below the camera 16. The second calibration assembly 6 also includes an arc plate 61, a plug rod 63, a sleeve rod 64, and a spring 65. Figure 4 As shown, the sleeve rod 64 is fixed to the side of the roller conveying assembly 5, and a plug rod 63 is inserted into the sleeve rod 64. A spring 65 is provided between the plug rod 63 and the sleeve rod 64. An infrared sensor 62 is provided on one side of the plug rod 63. An arc-shaped plate 61 is provided on the side of the plug rod 63. The arc-shaped plate 61 adopts a curved blade structure, and the bottom end of the arc-shaped plate 61 is higher than the top end of the roller conveying assembly 5. The protruding surface of the arc-shaped plate 61 is aligned with the input end of the roller conveying assembly 5, and the second calibration assembly 6 is located between the rollers of the roller conveying assembly 5. After the infrared sensor 62 detects that the liquid crystal substrate glass 3 has entered the appropriate position of the receiving assembly 7, the receiving assembly 7 can be raised by the PLC control system, and then the camera 16 can be used to capture images.

[0034] The side of the roller conveying assembly 5 is provided with an image measuring assembly 1, which includes a protective cover 11, a grid plate 12, and a camera 16; Figure 2 As shown, the grid plate 12 is located inside the protective cover 11, and a camera 16 is located at the center of the side of the grid plate 12; the infrared sensor 62 and the camera 16 are connected to the PLC control system. The infrared sensor 62 is used to detect when the liquid crystal substrate glass 3 reaches a predetermined position, and then the PLC control system controls the camera 16 to take a picture to obtain the reflected image of the grid plate 12 reflected onto the surface of the liquid crystal substrate glass 3; the PLC control system is used to compare the acquired image to determine whether the warp quality of the acquired image is qualified; the PLC control system is connected to the DSC system, and the DSC system is connected to the display terminal; the image measurement component 1 also includes a light-shielding curtain 13, The protective cover 11 includes a light intensity sensor 14 and a fill light 15. Light-blocking curtains 13 are provided at both ends of the protective cover 11, and multiple parallel fill lights 15 are installed inside the protective cover 11. The light intensity sensor 14 is located inside the protective cover 11, and the light intensity sensor 14 and the fill lights 15 are connected to a PLC control system. The grid plate 12 is divided into several small squares by horizontally and vertically arranged black lines, each square measuring 50mm x 50mm. The width of the black lines is 10nm. The grid plate 12 is parallel to the support rod 73, and the camera 16 can be activated when the support rod 73 is raised to a distance of 2.5m from the grid plate 12 by a cylinder 71.

[0035] In use, the present invention first places the liquid crystal substrate glass 3 to be tested in the size measuring component 2 for size measurement. During size measurement, one right angle of the glass is placed inside the right angle plate 21, and then the length and width of the liquid crystal substrate glass 3 are measured by the sliding laser rangefinder 23 to obtain the size of the liquid crystal substrate glass. Then, based on the size of the liquid crystal substrate glass, the PLC control system determines the distance between the two side baffles 42 and the position of the liquid crystal substrate glass 3 on the support component 7 (half of the difference between the width of the support component 7 and the width of the liquid crystal substrate glass is the distance that the infrared sensor 62 needs to detect, and this distance can place the liquid crystal substrate glass 3 directly below the camera 16). Then, according to the size measurement structure, the first calibration component 4 is activated, the motor 41 is started, and the lead screw 45 is rotated by the motor 41, which in turn drives the two side baffles 42 to move closer or further apart through the nut 44, so that the distance between the two side baffles 42 is the same as the width of the liquid crystal substrate glass, and the liquid crystal substrate glass 3 is placed in the correct position. Before the two side baffles 42 placed on the roller conveyor assembly 5, the roller conveyor assembly 5 is activated to transport the liquid crystal substrate glass 3 to the receiving assembly 7. When it reaches directly below the camera 16, that is, when the infrared sensor 62 detects that the liquid crystal substrate glass 3 is directly below the camera 16, the cylinder 71 is activated, and the receiving assembly 7 lifts the liquid crystal substrate glass 3 to a distance of 2.5 meters from the camera, and then the camera 16 starts to take pictures. Before taking pictures, the internal brightness is detected by the brightness sensor 14. If the brightness is insufficient, the supplementary light 15 can be controlled by the PLC control system to increase the brightness, ensuring that the brightness inside the protective cover 11 reaches a suitable level, so that the liquid crystal substrate glass 3 can clearly reflect the image on the grid plate 12. After the camera 16 obtains the image, the degree of distortion of the image reflects the degree of warping of the liquid crystal substrate glass 3. Generally, the degree of distortion of the liquid crystal glass substrate under test is obtained by comparing the image of the grid plate 12 reflected onto the flat glass plate with the image of the laser substrate glass under test, and its warping state is judged. Figure 6 As shown in Figure a, if the obtained image is a qualified image, the display terminal will directly display OK; if the obtained image in Figure b is a defective image with severe warping, the display terminal will directly display NG.

[0036] This invention adds an automatic warp image detection device to the glass plate conveying device of a DC production line. When the liquid crystal substrate glass 3 passes through the automatic warp image detection device, the data of the reflected image formed by the light irradiated onto the glass plate by the camera 16 is compared and analyzed. At this time, the data is converted by the PLC control system and then transmitted to the DCS control system, and finally displayed on the DCS display terminal. This allows for convenient observation, operation, and control of the product warp image quality, achieving digital management of warp image formation for online automated detection of liquid crystal substrate glass, thereby continuously improving the scientific field of technological innovation and development.

[0037] This invention detects the warpage of liquid crystal substrate glass by capturing its reflected image with a camera once the glass reaches the appropriate position during transport. The invention also avoids affecting detection accuracy by lifting the liquid crystal substrate glass during transport; furthermore, it enables automated full inspection, reducing manual labor and improving inspection efficiency.

[0038] During detection, this invention combines infrared sensing technology with the size of the liquid crystal substrate glass to ensure that the liquid crystal substrate glass under test is always directly below the camera, thereby ensuring more accurate images and more precise detection results.

[0039] The present invention can also adjust the light according to the ambient light to ensure that the image is clearer.

[0040] This invention enables online automatic full inspection of product warpage quality. The DSC control system of this invention has a built-in alarm unit, which can provide feedback to operators via signal lights and buzzers when the product warpage evaluation results are displayed on the display terminal. The image database stored in the data processor of the warpage image PLC control system can be updated periodically as needed to further improve the accuracy of online warpage detection. In this invention, technicians can extract corresponding liquid crystal substrate glass based on the degree of change in the reflected image and use an under-stage coordinate measuring machine to detect its warpage quality under static conditions. The results of the online automatic full inspection of glass warpage can be reviewed and evaluated to ensure the accuracy of online detection. Through the analysis of abnormal reflected images, technicians can summarize the root causes of different warpage image anomalies, facilitating on-site personnel to promptly check and eliminate equipment and process abnormalities based on the abnormal phenomena in the online warpage reflected images, improving the timeliness and effectiveness of countermeasures. The device for online measurement of warpage images can effectively manage warpage quality. After the warpage image level judgment is transmitted to the control system, it is then converted to the DCS control system device via the PLC system, facilitating convenient and quick management of quality and product countermeasures.

[0041] By installing a warp image quality assessment device (which classifies warp based on the degree and quantity of deformation), the real-time quality of the warp image can be detected. The assessment device displays the warp image and provides feedback, which is then transmitted via signal transmission and PLC conversion to the DCS control system. This completes the monitoring signal for warp image quality quality assessment. By inputting the warp image detection signal to the DCS control panel, the warp image data and quality assessment results for each glass panel can be clearly viewed, allowing for control over the warp image quality data and providing some control over optimizing the warp grade.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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, they should not be construed as limitations on this invention.

[0043] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0045] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. An online measuring device for the warped image of a liquid crystal substrate glass, characterized in that: The system includes a roller conveying assembly (5), and a support assembly (7) for lifting the liquid crystal substrate glass (3) is provided on the side of the roller conveying assembly (5); a second calibration assembly (6) is provided on the side of the roller conveying assembly (5), and the second calibration assembly (6) includes an infrared sensor (62). The roller conveying assembly (5) has an image measurement assembly (1) on its side. The image measurement assembly (1) includes a protective cover (11), a grid plate (12), and a camera (16). The grid plate (12) is located inside the protective cover (11), and the camera (16) is located at the center of the side of the grid plate (12). The infrared sensor (62) and the camera (16) are connected to the PLC control system. The infrared sensor (62) is used to detect when the liquid crystal substrate glass (3) reaches a predetermined position and then control the camera (16) to take a picture through the PLC control system to obtain the reflected image of the grid plate (12) reflected onto the surface of the liquid crystal substrate glass (3). The PLC control system is used to compare the obtained image to determine whether the warping quality of the obtained image is qualified. The PLC control system is connected to the DSC system, and the DSC system is connected to the display terminal. The second calibration component (6) further includes an arc plate (61), a plug rod (63), a sleeve rod (64), and a spring (65). The sleeve rod (64) is fixed to the side of the roller conveying component (5), and the plug rod (63) is inserted into the inside of the sleeve rod (64). A spring (65) is provided between the plug rod (63) and the sleeve rod (64). An infrared sensor (62) is provided on one side of the plug rod (63). An arc plate (61) is provided on the side of the plug rod (63). It also includes a size measuring component (2), which is used to measure the size of the liquid crystal substrate glass (3); the size measuring component (2) includes a right angle plate (21), a measuring table (22), a laser rangefinder (23) and a slide (24). The measuring table (22) has a right angle plate (21) on its side, and a slide (24) is opened on the opposite side surface of the right angle plate (21). The slide (24) is slidably connected to the laser rangefinder (23); the laser rangefinder (23) is connected to the PLC control system.

2. The online measurement device for the warped image of a liquid crystal substrate glass according to claim 1, characterized in that: The receiving assembly (7) includes a cylinder (71), a connecting rod (72) and a support rod (73). The roller conveying assembly (5) has a support rod (73) between its rollers. Both ends of the support rod (73) are connected to the connecting rod (72). The side of the connecting rod (72) is connected to the cylinder (71), and the other end of the cylinder (71) is connected to the protective cover (11).

3. The online measurement device for the warped image of a liquid crystal substrate glass according to claim 1, characterized in that: The image measurement component (1) also includes a light-shielding curtain (13), a light intensity sensor (14), and a fill light (15). The protective cover (11) has a light-shielding curtain (13) at both ends of the opening, and a plurality of parallel fill lights (15) are installed inside the protective cover (11). The light intensity sensor (14) is installed inside the protective cover (11), and the light intensity sensor (14) and the fill light (15) are connected to the PLC control system.

4. The online measurement device for the warped image of a liquid crystal substrate glass according to claim 1, characterized in that: The grid plate (12) is divided into several small squares by horizontal and vertical black lines, the size of which is 50mm*50mm; the width of the black lines is 10nm.

5. The online measurement device for the warpage image of a liquid crystal substrate glass according to claim 2, characterized in that: The grid plate (12) is parallel to the support rod (73), and the camera (16) can be started when the support rod (73) is raised by the cylinder (71) to a distance of 2.5m from the grid plate (12).

6. The online measurement device for the warped image of a liquid crystal substrate glass according to claim 1, characterized in that: The arc plate (61) adopts a curved blade structure, and the bottom of the arc plate (61) is higher than the top of the roller conveying assembly (5); the protruding surface of the arc plate (61) is aligned with the input end of the roller conveying assembly (5), and the second calibration assembly (6) is located between the rollers of the roller conveying assembly (5).

7. An online measurement device for the warpage image of a liquid crystal substrate glass according to any one of claims 1-6, characterized in that: It also includes a first calibration component (4), which includes a motor (41), a side baffle (42), an extension baffle (43), a nut (44), and a lead screw (45). The lead screw (45) is rotatably connected to the side of the roller conveying component (5), and one end of the lead screw (45) is connected to the motor (41). The side of the lead screw (45) is provided with two nuts (44). The motor (41) drives the lead screw (45) to rotate, thereby driving the two nuts (44) to move closer or further apart. The side of each nut (44) is fixed with a side baffle (42), and the side of the side baffle (42) is provided with a pulley. The end of the side baffle (42) is rotatably connected to the extension baffle (43).

Images