A device and method for detecting the deflection of a display glass substrate.

Abstract

The present application relates to glass deflection detection technical field, specifically to a kind of deflection detection device and method of display glass substrate, including top frame, still including: moving frame, first driving part, first electric cylinder, lifting frame, suction cup assembly, second electric cylinder, first support table, photographing part, four second driving parts, image processing module and controller, wherein: photographing part includes the first scale, second scale, third scale and fourth scale being set in the lifting frame below, the top of first scale, second scale, third scale and fourth scale is equipped with slider, the bottom of slider is equipped with video camera, and video camera is distributed with corresponding scale scale error;First support table is used to place glass substrate, and the top surface of first support table is black.The present application can automatically find the center of glass substrate, saves a lot of manual operation, so that it is more convenient and fast to operate, improves work efficiency.

Description

Technical Field

[0001] This invention relates to the field of glass deflection testing technology, and more particularly to a device and method for testing the deflection of a display glass substrate. Background Technology

[0002] One of the quality inspections for display glass substrates is to check the deflection of the glass substrate. Glass substrate deflection refers to the bending deformation that occurs in the middle of the glass substrate when it is fixed at both ends under the action of gravity or wind force.

[0003] Patent application number 201811183338.X discloses a float glass deflection measuring device. Its features include a base frame, a working frame supported by a set of columns, a set of leveling blocks above the working frame, and a rangefinder positioned at the center below the working frame. The advantages of this invention are: it can measure the deflection of glass of any thickness, uses electronic control for measurement, does not generate a reaction force on the glass during the measurement process, and provides accurate measurements. In use, the glass to be measured is placed horizontally above the leveling blocks. The glass deforms under its own weight and internal stress. The rangefinder senses the deformation value, and the deflection value is obtained after numerical calculation.

[0004] The inventors discovered some shortcomings in the above-mentioned measuring device when conducting tests. For example, marking the center of the glass sample with stickers or markers is usually done manually, which is inconvenient and inefficient. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a deflection detection device and method for display glass substrates, so as to solve the problems that it is inconvenient and inefficient to manually mark the center of the glass substrate.

[0006] To achieve the above objectives, the present invention provides a deflection detection device for a display glass substrate, comprising a top frame, and further comprising:

[0007] The system comprises a moving frame, a first drive unit, a first electric cylinder, a lifting frame, a suction cup assembly, a second electric cylinder, a first support platform, a photographing unit, four second drive units, an image processing module, and a controller, wherein:

[0008] The movable frame is slidably connected to the top frame, and the first driving unit is driven to the movable frame to drive the movable frame to move. The top of the movable frame is provided with a third electric cylinder, and the telescopic rod of the third electric cylinder is provided on the side of the first electric cylinder.

[0009] The first electric cylinder is mounted on the movable frame, the lifting frame is located at the bottom of the first electric cylinder, and the suction cup assembly is located at the bottom of the lifting frame;

[0010] The second electric cylinder is vertically positioned at the center of the bottom of the lifting frame;

[0011] The camera unit includes a first scale, a second scale, a third scale, and a fourth scale disposed below the lifting frame. The first and second scales are parallel to the long side of the lifting frame, and the third and fourth scales are parallel to the short side of the lifting frame. The scales of the first, second, third, and fourth scales are disposed on the bottom surface and gradually increase in size along the lifting frame from the center to the edge. A slider is disposed above each of the first, second, third, and fourth scales, and a camera is disposed at the bottom of the slider. The camera is offset from the corresponding scale.

[0012] The four second driving parts are respectively connected to the four sliders for driving the sliders to move;

[0013] The first support platform is used to place the glass substrate, and the top surface of the first support platform is black;

[0014] The four cameras initially position themselves close to the center of the lifting frame. A suction cup assembly transfers the glass substrate to be inspected to the first support platform. The first electric cylinder then shortens. Each of the four cameras takes a picture of the glass substrate. Since the top surface of the first support platform is black, the scale will be imaged on the glass substrate. The image processing module selects the image closest to the center of the glass substrate as the first image. The corresponding scale markings at the four edges of the glass substrate in the first image are obtained. The controller then controls the corresponding second drive unit to move the slider to the corresponding scale marking, causing the four cameras to move to the corresponding edges of the glass substrate. Finally, the four cameras take pictures to obtain the glass substrate's image. The photograph at the edge of the substrate is used as the second photograph. The image processing module obtains the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4 corresponding to the first scale, the second scale, the third scale, and the fourth scale value L4 at the edge of the glass substrate, respectively. Based on the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4, the horizontal and vertical movement of the lifting frame are calculated. The first driving unit drives the lifting frame to move horizontally, and the third electric cylinder drives the lifting frame to move vertically, so that the second electric cylinder is located at the center of the glass substrate. The second electric cylinder is used to apply the label.

[0015] Optionally, the horizontal movement is calculated using the following formula:

[0016] Horizontal movement = ,in:

[0017] When L1 is greater than L2, S1 = L1, and the first drive unit drives the lifting frame to move horizontally to one side of the first scale.

[0018] When L1 is less than L2, S1 = L2, and the first drive unit drives the lifting frame to move horizontally to one side of the second scale.

[0019] Vertical movement = ,in:

[0020] When L3 is greater than L4, S2 = L3, and the third electric cylinder drives the lifting frame to move vertically to one side of the third scale.

[0021] When L3 is less than L4, S2 = L4, and the third electric cylinder drives the lifting frame to move vertically to one side of the fourth scale.

[0022] Optionally, the first drive unit includes a sixth electric cylinder, which is mounted on the top frame, and one end of the telescopic rod of the sixth electric cylinder is disposed on the movable frame.

[0023] Optionally, the second drive unit includes a lead screw rotatably connected below the lifting frame, one end of the lead screw being drivenly connected to a motor, and the slider being threadedly connected to the lead screw.

[0024] Optionally, the device further includes a detection unit disposed below the top frame, which detects the deflection of the glass substrate based on a label.

[0025] Optionally, the detection unit includes a base frame, on which a second support platform is provided, and a support rod is provided on the second support platform. The second support platform has a first through groove, and a laser rangefinder is provided below the center of the first through groove. A fourth electric cylinder is provided on both sides of the laser rangefinder, and a support plate is provided on the top of the fourth electric cylinder. A second through groove is provided on the support plate.

[0026] Optionally, the device further includes a tear-off part disposed at the bottom of the lifting frame, the tear-off part being used to remove the label affixed to the glass substrate.

[0027] Optionally, the tearing part includes a fifth electric cylinder disposed on both sides of the second electric cylinder, a pull rope is provided on the telescopic rod of the fifth electric cylinder, a label is provided between the two pull ropes, and an adhesive layer is provided at the bottom of the label.

[0028] Based on the same invention, this invention also provides a method for detecting the deflection of a display glass substrate using a device, comprising:

[0029] The scale corresponding to the four edges of the glass substrate in the first image is obtained. The controller controls the corresponding second driving unit to drive the slider to move to the corresponding scale, so that the four cameras move to the corresponding edges of the glass substrate respectively.

[0030] Then, the four cameras are used to take pictures of the edge of the glass substrate as the second picture. The image processing module is used to obtain the first scale value L1, the second scale value L2, the third scale value L3 and the fourth scale value L4 corresponding to the first scale, the second scale, the third scale and the fourth scale at the edge of the glass substrate, respectively.

[0031] The horizontal and vertical movement of the lifting frame are calculated based on the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4. The first drive unit drives the lifting frame to move horizontally, and the third electric cylinder drives the lifting frame to move vertically, so that the second electric cylinder is located at the center of the glass substrate, so that the suction cup assembly re-adheres the glass substrate, and the label is pasted by the second electric cylinder.

[0032] After the label is pasted, the first electric cylinder shortens to re-adhere the glass substrate on the first support platform. Then, the first drive unit and the third electric cylinder control the lifting frame to move so that the label is moved directly above the laser rangefinder. The first electric cylinder extends to support both sides of the glass substrate through the support rod. With the support of the support plate, the glass substrate is kept in a horizontal state. Then, the suction cup assembly releases the glass substrate, and the first electric cylinder shortens.

[0033] The first distance from the laser rangefinder to the label is obtained by measuring the distance using a laser rangefinder. Then, the fourth electric cylinder shortens the distance, causing the support plate to separate from the glass substrate. The glass substrate bends under its own weight. After stabilization, the second distance from the laser rangefinder to the label is obtained by measuring the distance using a laser rangefinder. The deflection of the glass substrate is obtained by subtracting the second distance from the first distance.

[0034] When this testing device is in operation, the four cameras initially position themselves close to the center of the lifting frame. At this point, the scale markings of the four cameras correspond to the 0 mark of the scale. The glass substrate to be tested is first transferred to the first support platform using a suction cup assembly. The first electric cylinder is then shortened, and the four cameras take pictures of the glass substrate. Since the top surface of the first support platform is black, the scale will be imaged on the glass substrate, resulting in an image of the scale in the captured glass substrate. The image processing module selects the image of the glass substrate closest to the center of the photograph as the first image. Specifically, the first image can be determined based on the distances between the four edges of the glass substrate and the corresponding edges of the photograph. For example, the absolute values ​​of the distance differences between the two long sides and the two short sides can be calculated, and the image with the smallest sum is selected as the first image. The image processing module then obtains the scale markings corresponding to the four edges of the glass substrate in the first image. The controller controls the corresponding second drive unit to move the slider to the corresponding scale marking, causing the four cameras to move to the corresponding edges of the glass substrate. Finally, the four cameras take pictures to capture the glass substrate. The photograph at the edge of the substrate is used as the second photograph. The image processing module obtains the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4 corresponding to the first, second, third, and fourth scales at the edge of the glass substrate, respectively. Since the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4 are obtained by moving the photograph to the edge of the glass substrate, the error can be significantly reduced compared to the scale in the first photograph. Then, based on the first scale value L1, the second... The horizontal and vertical movement of the lifting frame are calculated using the scale values ​​L2, L3, and L4. The first drive unit moves the lifting frame horizontally, and the third electric cylinder moves the lifting frame vertically, so that the second electric cylinder is located at the center of the glass substrate. Then the first electric cylinder extends, allowing the suction cup assembly to re-adhere to the glass substrate. Then the second electric cylinder extends, and the label at the bottom of the second electric cylinder is pasted to the center of the glass substrate. At this time, the controller can control the four cameras to return to their initial positions, making it easier to find the center of the next glass substrate.

[0035] As can be seen from the above, this device can automatically locate the center of the glass substrate and then attach a label to the center of the glass substrate. Compared with the manual method of continuous measurement and calculation, it saves a lot of manual work, making the operation more convenient and faster and improving work efficiency. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a front view of the lifting frame according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the photographing unit according to an embodiment of the present invention;

[0039] Figure 3 This is a top view of the top frame according to an embodiment of the present invention;

[0040] Figure 4 This is a top view of the glass substrate according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the detection unit in an embodiment of the present invention;

[0042] Figure 6 for Figure 5 Enlarged view of the fifth electric cylinder.

[0043] 1. Top frame; 2. Moving frame; 3. First electric cylinder; 4. Lifting frame; 5. Suction cup assembly; 6. Second electric cylinder; 7. First support platform; 8. Third electric cylinder; 9. First scale; 10. Second scale; 11. Fourth scale; 12. Slider; 13. Camera; 14. Glass substrate; 15. Sixth electric cylinder; 16. Lead screw; 17. Motor; 18. Base frame; 19. Second support platform; 20. Support rod; 21. Laser rangefinder; 22. Fourth electric cylinder; 23. Support plate; 24. Fifth electric cylinder; 25. Pull rope; 26. Label. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0045] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] like Figures 1 to 4 As shown, a deflection detection device for a display glass substrate includes a top frame 1, and further includes:

[0047] The system comprises: 2. a moving frame; 3. a first drive unit; 4. a first electric cylinder; 5. a lifting frame; 6. a suction cup assembly; 7. a second electric cylinder; 8. a first support platform; 9. a photographing unit; 10. four second drive units; 11. an image processing module; and 12. a controller.

[0048] The movable frame 2 is slidably connected to the top frame 1. The first driving part is connected to the movable frame 2 for driving the movable frame 2 to move. The top of the movable frame 2 is provided with a third electric cylinder 8. The telescopic rod of the third electric cylinder 8 is arranged on the side of the first electric cylinder 3.

[0049] The first electric cylinder 3 is mounted on the movable frame 2, the lifting frame 4 is located at the bottom of the first electric cylinder 3, and the suction cup assembly 5 is located at the bottom of the lifting frame 4;

[0050] The second electric cylinder 6 is vertically positioned at the center of the bottom of the lifting frame 4;

[0051] The camera unit includes a first scale 9, a second scale 10, a third scale, and a fourth scale 11 disposed below the lifting frame 4. The first scale 9 and the second scale 10 are parallel to the long side of the lifting frame 4, and the third scale and the fourth scale 11 are parallel to the short side of the lifting frame 4. The scales of the first scale 9, the second scale 10, the third scale, and the fourth scale 11 are disposed on the bottom surface and gradually increase in size along the lifting frame 4 from the center to the edge. A slider 12 is provided above each of the first scale 9, the second scale 10, the third scale, and the fourth scale 11, and a camera 13 is provided at the bottom of the slider 12. The camera 13 is staggered with the corresponding scale.

[0052] The four second driving parts are respectively connected to the four sliders 12 for driving the sliders 12 to move;

[0053] The first support platform 7 is used to place the glass substrate 14, and the top surface of the first support platform 7 is black.

[0054] The four cameras 13 initially approach the center of the lifting frame 4. The suction cup assembly 5 transfers the glass substrate 14 to be inspected onto the first support platform 7. The first electric cylinder 3 is then shortened. Each of the four cameras 13 takes a picture of the glass substrate 14. Since the top surface of the first support platform 7 is black, the scale will be imaged on the glass substrate 14. The image processing module selects the image closest to the center of the glass substrate 14 as the first image. The corresponding scale markings at the four edges of the glass substrate 14 in the first image are obtained. The controller then controls the corresponding second drive unit to move the slider 12 to the corresponding scale markings, causing the four cameras 13 to move to the corresponding edges of the glass substrate 14. Finally, the four cameras 13 take pictures. A photograph of the edge of the glass substrate 14 is obtained as a second photograph. The image processing module obtains the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4 corresponding to the first scale 9, the second scale 10, the third scale 11, and the fourth scale 11 at the edge of the glass substrate 14, respectively. Based on the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4, the horizontal and vertical movement of the lifting frame 4 are calculated. The first driving unit drives the lifting frame 4 to move horizontally, and the third electric cylinder 8 drives the lifting frame 4 to move vertically, so that the second electric cylinder 6 is located at the center of the glass substrate 14. The second electric cylinder 6 is used to attach the label 26.

[0055] When this testing device is in operation, the four cameras 13 initially position themselves close to the center of the lifting frame 4. At this point, the scale markings of the four cameras 13 correspond to the 0 mark of the scale. The glass substrate 14 to be tested is first transferred to the first support platform 7 via the suction cup assembly 5. The first electric cylinder 3 is then shortened, and the four cameras 13 take pictures of the glass substrate 14. Since the top surface of the first support platform 7 is black, the scale will be imaged on the glass substrate 14. Therefore, the image of the scale will be present in the captured image of the glass substrate 14. The image processing module selects the image of the glass substrate 14 whose position is closest to the center of the photograph as the first image. Specifically, a first photograph can be determined based on the distances between the four edges of the glass substrate 14 and the corresponding edges of the photograph. For example, the absolute values ​​of the distance differences between the two long edges and the two short edges can be calculated, and the photograph with the smallest summation value is taken as the first photograph. Then, the image processing module obtains the scale corresponding to the four edges of the glass substrate 14 in the first photograph. The controller controls the corresponding second drive unit to move the slider 12 to the corresponding scale, so that the four cameras 13 move to the corresponding edges of the glass substrate 14, and then the four cameras 13 take pictures to obtain the glass substrate 14. The photograph at the edge of substrate 14 is used as the second photograph. The image processing module obtains the first scale value L1, second scale value L2, third scale value L3, and fourth scale value L4 corresponding to the first scale 9, second scale 10, third scale 11, and fourth scale 11 at the edge of the glass substrate 14, respectively. Since the first scale value L1, second scale value L2, third scale value L3, and fourth scale value L4 are obtained by moving the photograph to the edge of the glass substrate 14, the error can be significantly reduced compared to the scale in the first photograph. Then, based on the first scale value L1, second scale value L2... The third scale value L3 and the fourth scale value L4 are used to calculate and obtain the horizontal and vertical movement of the lifting frame 4. The first drive unit drives the lifting frame 4 to move horizontally, and the third electric cylinder 8 drives the lifting frame 4 to move vertically, so that the second electric cylinder 6 is located at the center of the glass substrate 14. Then the first electric cylinder 3 extends, so that the suction cup assembly 5 re-adhere to the glass substrate 14. Then the second electric cylinder 6 extends, and the label 26 at the bottom of the second electric cylinder 6 is pasted to the center of the glass substrate 14. At this time, the controller can control the four cameras 13 to return to the initial position, so as to find the center of the next glass substrate 14.

[0056] As can be seen from the above, this device can automatically find the center of the glass substrate 14 and then attach the label 26 to the center of the glass substrate 14. Compared with the manual method of continuous measurement and calculation, it saves a lot of manual work, making the operation more convenient and faster and improving work efficiency.

[0057] In some embodiments, the horizontal movement is calculated using the following formula:

[0058] Horizontal movement = ,in:

[0059] When L1 is greater than L2, S1 = L1, and the first drive unit drives the lifting frame 4 to move horizontally to one side of the first scale 9.

[0060] When L1 is less than L2, S1 = L2, and the first drive unit drives the lifting frame 4 to move horizontally to one side of the second scale 10.

[0061] Vertical movement = ,in:

[0062] When L3 is greater than L4, S2 = L3, and the third electric cylinder 8 drives the lifting frame 4 to move vertically to one side of the third scale.

[0063] When L3 is less than L4, S2 = L4, and the third electric cylinder 8 drives the lifting frame 4 to move vertically to one side of the fourth scale 11.

[0064] The above calculation method ensures that the horizontal and vertical movement amounts are always positive. At the same time, by determining the magnitudes of L1 and L2, and L3 and L4, the lifting frame 4 moves towards the side with the larger value, ensuring the correctness of the movement direction and guaranteeing that the lifting frame 4 moves towards the center of the glass substrate 14.

[0065] In some embodiments, the first drive unit includes a sixth electric cylinder 15, which is mounted on the top frame 1, and one end of the telescopic rod of the sixth electric cylinder 15 is disposed on the movable frame 2. During operation, the extension or retraction of the sixth electric cylinder 15 drives the movable frame 2 to move back and forth on the top frame 1.

[0066] In some embodiments, the second drive unit includes a lead screw 16 rotatably connected below the lifting frame 4, one end of the lead screw 16 being drivenly connected to a motor 17, and the slider 12 being threadedly connected to the lead screw 16.

[0067] During operation, the motor 17 drives the lead screw 16 to rotate, the lead screw 16 drives the slider 12 to move, thereby driving the camera 13 to move along the lead screw 16.

[0068] like Figure 5 As shown, in some embodiments, the device further includes a detection unit disposed below the top frame 1, which detects the deflection of the glass substrate 14 based on the label 26.

[0069] Optionally, the detection unit includes a base frame 18, on which a second support platform 19 is provided, and a support rod 20 is provided on the second support platform 19. The second support platform 19 has a first through groove, and a laser rangefinder 21 is provided below the center of the first through groove. A fourth electric cylinder 22 is provided on both sides of the laser rangefinder 21, and a support plate 23 is provided on the top of the fourth electric cylinder 22. A second through groove is provided on the support plate 23.

[0070] During detection using this detection unit, after the label 26 is pasted, the first electric cylinder 3 shortens to re-adhere the glass substrate 14 on the first support platform 7. Then, the lifting frame 4 is moved by the first drive unit and the third electric cylinder 8, so that the label 26 is moved directly above the laser rangefinder 21. The first electric cylinder 3 extends to support both sides of the glass substrate 14 through the support rod 20. With the support of the support plate 23, the glass substrate 14 is kept in a horizontal state. Then, the suction cup assembly 5 releases the glass substrate 14, the first electric cylinder 3 shortens, and the first distance from the laser rangefinder 21 to the label 26 is obtained by detection. Then, the fourth electric cylinder 22 shortens to separate the support plate 23 from the glass substrate 14. The glass substrate 14 bends under its own weight. After stabilization, the second distance from the laser rangefinder 21 to the label 26 is obtained by detection. The deflection of the glass substrate 14 is obtained by subtracting the second distance from the first distance.

[0071] like Figure 5 and Figure 6 As shown, in some embodiments, the device further includes a tear-off part disposed at the bottom of the lifting frame 4, which is used to remove the label 26 affixed to the glass substrate 14. Optionally, the tear-off part includes a fifth electric cylinder 24 disposed on both sides of the second electric cylinder 6, with a pull rope 25 on the telescopic rod of the fifth electric cylinder 24, and a label 26 disposed between the two pull ropes 25, the bottom of which has an adhesive layer.

[0072] When the laser rangefinder 21 is used for detection, the pull cord 25 is in a slack state. When the label 26 needs to be removed, the fourth electric cylinder 22 extends so that the support plate 23 supports the glass substrate 14 again. Then the first electric cylinder 3 extends and the glass substrate 14 is adsorbed by the suction cup assembly 5. At this time, the second electric cylinder 6 is in a shortened state. Then the fifth electric cylinder 24 shortens and the label 26 is pulled by the pull cord 25, thereby removing the label 26 from the glass substrate 14. This operation is convenient and the label 26 can be reused.

[0073] To further implement the present invention, the present invention also provides a method for detecting the deflection of a display glass substrate 14, comprising:

[0074] The scale corresponding to the 144 edges of the glass substrate 14 in the first photo is obtained. The controller controls the corresponding second driving part to move the slider 12 to the corresponding scale, so that the four cameras 13 move to the corresponding edges of the glass substrate 14 respectively.

[0075] Then, the four cameras 13 take pictures of the edge of the glass substrate 14 as the second picture. The image processing module obtains the first scale value L1, the second scale value L2, the third scale value L3 and the fourth scale value L4 corresponding to the first scale 9, the second scale 10, the third scale and the fourth scale 11 at the edge of the glass substrate 14, respectively.

[0076] The horizontal and vertical movement of the lifting frame 4 are calculated based on the first scale value L1, the second scale value L2, the third scale value L3, and the fourth scale value L4. The first drive unit drives the lifting frame 4 to move horizontally, and the third electric cylinder 8 drives the lifting frame 4 to move vertically, so that the second electric cylinder 6 is located at the center of the glass substrate 14, so that the suction cup assembly 5 re-adhere to the glass substrate 14, and the label 26 is pasted by the second electric cylinder 6.

[0077] After the label 26 is pasted, the first electric cylinder 3 shortens to re-adhere the glass substrate 14 on the first support platform 7. Then, the lifting frame 4 is moved by the first drive unit and the third electric cylinder 8 to move the label 26 directly above the laser rangefinder 21. The first electric cylinder 3 extends to support both sides of the glass substrate 14 through the support rod 20. With the support of the support plate 23, the glass substrate 14 is in a horizontal state. Then, the suction cup assembly 5 releases the glass substrate 14 and the first electric cylinder 3 shortens.

[0078] The first distance from the laser rangefinder 21 to the tag 26 is obtained by detecting the laser rangefinder 21. Then, the fourth electric cylinder 22 shortens the distance, causing the support plate 23 to separate from the glass substrate 14. The glass substrate 14 bends under its own weight. After stabilization, the second distance from the laser rangefinder 21 to the tag 26 is obtained by detecting the laser rangefinder 21. The deflection of the glass substrate 14 is obtained by subtracting the second distance from the first distance.

[0079] The above method can automatically locate the center of the glass substrate 14, and then the label 26 can be pasted to the center of the glass substrate 14. Compared with the manual method of continuous measurement and calculation, it saves a lot of manual work, making the operation more convenient and faster, and improving work efficiency.

[0080] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0081] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A deflection detection device for display glass substrates, comprising a top frame (1), characterized in that, Also include: Mobile frame (2), first drive part, first electric cylinder (3), lifting frame (4), suction cup assembly (5), second electric cylinder (6), first support table (7), photographing part, four second drive parts, image processing module and controller, wherein: The mobile frame (2) is slidably connected to the top frame (1), the first drive part is in transmission connection with the mobile frame (2), used for driving the mobile frame (2) to move, the top of the mobile frame (2) is provided with a third electric cylinder (8), and the telescopic rod of the third electric cylinder (8) is arranged on the side of the first electric cylinder (3); The first electric cylinder (3) is arranged on the mobile frame (2), the lifting frame (4) is arranged at the bottom of the first electric cylinder (3), and the suction cup assembly (5) is arranged at the bottom of the lifting frame (4); The second electric cylinder (6) is vertically arranged at the center of the bottom of the lifting frame (4); The photographing part includes a first scale (9), a second scale (10), a third scale and a fourth scale (11) arranged below the lifting frame (4), the first scale (9) and the second scale (10) are parallel to the long side of the lifting frame (4), the third scale and the fourth scale (11) are parallel to the short side of the lifting frame (4), the scales of the first scale (9), the second scale (10), the third scale and the fourth scale (11) are arranged on the bottom surface and gradually increase along the direction from the center to the edge of the lifting frame (4), the top of each of the first scale (9), the second scale (10), the third scale and the fourth scale (11) is provided with a sliding block (12), the bottom of the sliding block (12) is provided with a camera (13), and the camera (13) is distributed in a staggered manner with the corresponding scale; Four second drive parts are in transmission connection with four sliding blocks (12) respectively, used for driving the sliding blocks (12) to move; The first support table (7) is used for placing a glass substrate (14), and the top surface of the first support table (7) is black. The four cameras (13) are initially close to one side of the center of the lifting frame (4), and the glass substrate (14) to be detected is first transferred to the first support table (7) through the suction cup assembly (5), the first electric cylinder (3) is controlled to shorten, then the four cameras (13) take photos of the glass substrate (14) respectively, since the top surface of the first support table (7) is black, the scale ruler will be imaged on the glass substrate (14), the image processing module selects the photo closest to the center of the glass substrate (14) as the first photo, obtains the scales corresponding to the four edges of the glass substrate (14) in the first photo, and the controller controls the corresponding second driving part to drive the sliding block (12) to move the corresponding scale, so that the four cameras (13) are moved to the positions corresponding to the four edges of the glass substrate (14) respectively, then the four cameras (13) take photos to obtain the second photo, the image processing module obtains the first scale value L1, the second scale value L2, the third scale value L3 and the fourth scale value L4 corresponding to the first scale ruler (9), the second scale ruler (10), the third scale ruler and the fourth scale ruler (11) at the four edges of the glass substrate (14) respectively, and the horizontal movement amount and the vertical movement amount of the lifting frame (4) are calculated based on the first scale value L1, the second scale value L2, the third scale value L3 and the fourth scale value L4, the first driving part drives the lifting frame (4) to move the horizontal movement amount, and the third electric cylinder (8) drives the lifting frame (4) to move the vertical movement amount, so that the second electric cylinder (6) is located at the center of the glass substrate (14), and the second electric cylinder (6) is used for labeling (26).

2. The apparatus according to claim 1, wherein The horizontal movement amount is calculated by the following formula: Horizontal movement = ,in: When L1 is greater than L2, S1=L1, and the first driving part drives the lifting frame (4) to move the horizontal movement amount to one side of the first scale ruler (9); When L1 is less than L2, S1=L2, and the first driving part drives the lifting frame (4) to move the horizontal movement amount to one side of the second scale ruler (10); Vertical movement = ,in: When L3 is greater than L4, S2=L3, and the third electric cylinder (8) drives the lifting frame (4) to move the vertical movement amount to one side of the third scale ruler; When L3 is less than L4, S2=L4, and the third electric cylinder (8) drives the lifting frame (4) to move the vertical movement amount to one side of the fourth scale ruler (11).

3. The apparatus according to claim 1, wherein The first driving part includes a sixth electric cylinder (15), the sixth electric cylinder (15) is arranged on the top frame (1), and one end of the telescopic rod of the sixth electric cylinder (15) is arranged on the moving frame (2).

4. The apparatus for detecting the deflection of a glass substrate for a display according to claim 1, wherein The second driving part includes a lead screw (16) rotatably connected below the lifting frame (4), one end of the lead screw (16) is drivingly connected with a motor (17), and the sliding block (12) is threadedly connected with the lead screw (16).

5. The apparatus for detecting the deflection of a glass substrate for a display according to claim 1, wherein The device also comprises a detection unit arranged below the top frame (1), which detects the deflection of the glass substrate (14) based on the label (26).

6. The apparatus for detecting the deflection of a display glass substrate according to claim 5, wherein The detection unit comprises a bottom frame (18) provided with a second support table (19), the second support table (19) is provided with a support rod (20), the second support table (19) has a first through slot, a laser range finder (21) is arranged below the center of the first through slot, fourth electric cylinders (22) are arranged on both sides of the laser range finder (21), support plates (23) are arranged on the top of the fourth electric cylinders (22), and second through slots are arranged on the support plates (23).

7. The apparatus according to claim 6, wherein The device also comprises a tearing-off part arranged at the bottom of the lifting frame (4), which is used to tear off the label (26) attached to the glass substrate (14).

8. The apparatus according to claim 7, wherein The tearing-off part comprises fifth electric cylinders (24) arranged on both sides of the second electric cylinder (6), pull ropes (25) are arranged on the telescopic rods of the fifth electric cylinders (24), a label (26) is arranged between the two pull ropes (25), and a sticky layer is arranged at the bottom of the label (26).

9. A method of detecting a deflection of a glass substrate for a display according to the apparatus of claim 6, wherein It comprises: The corresponding scales at the edges of the glass substrate (14) in the first photo are acquired, the controller is used to control the corresponding second driving part to drive the sliding block (12) to move the corresponding scales, so that the four cameras (13) are moved to the corresponding edges of the glass substrate (14) respectively; Then, the photos of the edges of the glass substrate (14) are acquired by the four cameras (13) as the second photos, and the first scale value L1, the second scale value L2, the third scale value L3 and the fourth scale value L4 corresponding to the first scale (9), the second scale (10), the third scale and the fourth scale (11) at the edges of the glass substrate (14) in the second photos are acquired by the image processing module; The horizontal movement amount and the vertical movement amount of the lifting frame (4) are calculated based on the first scale value L1, the second scale value L2, the third scale value L3 and the fourth scale value L4, the first driving part is used to drive the lifting frame (4) to move the horizontal movement amount, the third electric cylinder (8) is used to drive the lifting frame (4) to move the vertical movement amount, so that the second electric cylinder (6) is located at the center of the glass substrate (14), the suction cup assembly (5) re-adsorbs the glass substrate (14), and the label (26) is pasted by the second electric cylinder (6); After the label (26) is pasted, the first electric cylinder (3) is shortened to make the glass substrate (14) on the first support table (7) re-adsorb, then the lifting frame (4) is moved by the first driving part and the third electric cylinder (8), so that the label (26) moves directly above the laser range finder (21), the first electric cylinder (3) is elongated to support the two sides of the glass substrate (14) through the support rod (20), the glass substrate (14) is in a horizontal state through the support of the support plate (23), then the suction cup assembly (5) releases the glass substrate (14), and the first electric cylinder (3) is shortened. The first distance from the laser range finder (21) to the label (26) is obtained by detection, and then is shortened by the fourth electric cylinder (22), so that the supporting plate (23) is separated from the glass substrate (14), the glass substrate (14) is bent under the action of its own gravity, and after stabilization, the second distance from the laser range finder (21) to the label (26) is obtained by detection of the laser range finder (21), and the deflection of the glass substrate (14) is obtained by subtracting the second distance from the first distance.

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