Optical glass flaw automatic detection device

Abstract

The invention relates to the technical field of glass scratch detection, in particular to an optical glass flaw automatic detection device which is used for detecting scratches on the surface of glass and comprises a platform for placing the glass and a camera installed over the glass, and the camera shoots the surface of the glass to intelligently recognize the displayed scratches. The platform comprises a light-emitting plate, electric suction cups fixedly installed at the four corners of the light-emitting plate, an installation frame jointly installed at the bottoms of the electric suction cups and a dumping assembly installed at the bottom of the installation frame, and fine powder is laid on the surface of glass. Fine powder is laid on the surface of the glass and falls into the scratches, the pouring assembly drives the horizontal glass to incline to enable the fine powder on the surface of the glass to slide down and then reset, the fine powder is reserved in the scratches, the light-emitting plate emits light and serves as a background, and the fine powder in the scratches shields light emitted by the light-emitting plate to form a scratch shadow different from the glass. The camera photographs the surface of the glass to intelligently recognize scratches.

Description

Technical Field

[0001] The invention relates to the technical field of glass scratch detection, and in particular to an automatic detection device for optical glass defects. Background Art

[0002] Optical glass is glass that can change the direction of light propagation and the relative spectral distribution of ultraviolet, visible or infrared light. During the production process of optical glass, impurities, bubbles, stones, cracks and other problems may occur, and they need to be inspected to prevent the outflow of defective products. The width of glass scratches is usually between 0.1mm and 0.5mm. Minor scratches are less than 0.1mm in width, and two scratches with a length of less than 50mm are allowed per square area; scratches with a width of more than 0.1mm and less than 0.5mm are allowed to have one scratch per square area. The particle size of fine powder is: 10~45um, that is, 0.01~0.45mm. Fine powder can usually be prepared by ball milling, mechanical crushing, spraying, explosion, chemical deposition and other methods; Since optical glass is a highly transparent material, the angle of the optical glass needs to be constantly adjusted during inspection to avoid missed inspections. However, manual inspection relies too much on the experience of quality inspectors and it is difficult to ensure long-term high-quality inspections. Later, people took pictures with cameras and then intelligently identified scratches, but they still needed to constantly adjust the angle of the optical glass and the light source to make the scratches visually form white scratches and appear, and multiple photos needed to be taken for comprehensive inspection.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0004] The purpose of the present invention is to design an automatic optical glass defect detection device that does not require multiple angle adjustments and photographing of the optical glass, but only requires two angle adjustments to reveal scratches, thereby reducing the number of photographs and intelligent identification times, so as to solve the above-mentioned deficiencies in the technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic optical glass defect detection device, used for detecting scratches on the glass surface, comprising a platform for placing glass, and a camera installed just above the glass, the camera takes a picture of the glass surface to intelligently identify the scratches displayed, the platform comprises a light-emitting board, electric suction cups fixedly installed at the four corners of the light-emitting board, a mounting frame installed together at the bottom of the electric suction cup, and a dumping assembly installed at the bottom of the mounting frame, and the glass surface is paved with fine powder; Fine powder spread on the glass surface will fall into the scratches. The tilting component drives the horizontal glass to tilt so that the fine powder on the glass surface slides down and resets, while the fine powder remains in the scratches. The light-emitting board emits light and acts as a background. The fine powder in the scratches blocks the light emitted by the light-emitting board to form a scratch shadow that is different from the glass. The camera takes a picture of the glass surface to intelligently identify the scratches.

[0006] Preferably, the tipping assembly includes a base frame, a first axis rotating around the X-axis on the base frame, connecting plates fixedly installed at both ends of the first axis, a second axis fixedly installed between the two connecting plates, a first hydraulic cylinder rotatably installed between the first axis and the base frame, and a second hydraulic cylinder rotatably installed between the first axis and the mounting frame, and the mounting frame is rotatably connected to the second axis around the Y-axis.

[0007] Preferably, a collecting frame is fixedly connected to the bottom of the base frame, the top surface of the collecting frame is lower than the bottom surface of the glass, and the cross-section of the collecting frame is larger than the horizontal plane of the glass.

[0008] Preferably, an XY-axis slide module is installed outside the collection frame, and a powder outlet pipe is installed on the head of the XY-axis slide module.

[0009] Preferably, a powder conveying device is installed at the bottom of the collecting frame, the input end of the powder conveying device is connected to the inner cavity of the collecting frame, and the output end of the powder conveying device is connected to the powder outlet pipe through a hose.

[0010] Preferably, the cross-section of the top of the collecting frame is larger than the cross-section of the bottom, and the collecting frame is in an inverted terrace shape as a whole.

[0011] Preferably, the particle size of the fine powder is 0.01 to 0.45 mm.

[0012] Preferably, the top surface of the light-emitting panel has a white light-transmitting film.

[0013] In the above technical solution, the technical effects and advantages provided by the present invention are: 1. The present invention spreads fine powder on the glass surface, and then tilts the glass to make the fine powder slide off, but the fine powder remains in the scratches of the glass. Then, a light-emitting board is used as a light source and a background, so that when the light is photographed on the glass, the fine powder in the scratches blocks the light, so that the scratches form black lines that are obviously different from other flawless parts of the glass. At this time, the camera takes a picture of the glass surface for intelligent recognition, and the position and number of the scratches on the glass can be determined; 2. The present invention uses fine powder to be located in the scratch, and when illuminated, a black line is formed that is clearly different from other normal parts of the glass. Compared with the prior art that constantly adjusts the angle of the glass and the light to make the scratches fully visible to form a white line, which is different from the normal parts of the glass, and requires taking multiple photos for intelligent identification, the present technical solution only requires one photo; 3. In order to avoid the error caused by the direction of the scratch, the present invention can drive the glass to tilt around the X-axis and take a picture after the first hydraulic cylinder drives the glass to tilt around the Y-axis and take a picture again, thereby improving the detection accuracy by taking pictures twice. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection between the glass and the platform of the present invention; Figure 3 It is a schematic diagram of the connection of the dumping assembly of the present invention; Figure 4 It is a schematic diagram showing that the fine powder of the present invention is located inside the scratch.

[0016] Description of reference numerals: 1. Platform; 1a. Light-emitting board; 1b. Electric suction cup; 1c. Mounting frame; 1d. Tipping assembly; 1d1. Base frame; 1d2. First axis; 1d3. Connecting plate; 1d4. Second axis; 1d5. First hydraulic cylinder; 1d6. Second hydraulic cylinder; 2. Camera; 3. Collection frame; 4. XY-axis slide module; 5. Machine head; 6. Powder outlet pipe; 7. Powder conveying equipment; 8. Hose; 9. Glass. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] The present invention provides Figure 1-4An automatic optical glass defect detection device shown is used for detecting scratches on the surface of glass 9, comprising a platform 1 for placing glass 9, and a camera 2 installed just above the glass 9, the camera 2 takes a picture of the surface of the glass 9 to intelligently identify the scratches displayed, the surface of the glass 9 is paved with fine powder, the particle size of the fine powder is 0.01-0.45 mm, the platform 1 comprises a light-emitting board 1a, electric suction cups 1b fixedly installed at the four corners of the light-emitting board 1a, a mounting frame 1c installed together at the bottom of the electric suction cup 1b, and a tipping assembly 1d installed at the bottom of the mounting frame 1c, the tipping assembly 1d comprises a base frame 1d1, a first axis 1d2 rotating around the X-axis on the base frame 1d1, connecting plates 1d3 fixedly installed at both ends of the first axis 1d2, a second axis 1d4 fixedly installed between the two connecting plates 1d3, a first hydraulic cylinder 1d5 rotatably installed between the first axis 1d2 and the base frame 1d1, and a second hydraulic cylinder 1d6 rotatably installed between the first axis 1d2 and the mounting frame 1c, the mounting frame 1c is connected to rotate around the Y axis on the second axis 1d4, the top surface of the light-emitting plate 1a has a white light-transmitting film, the white light-transmitting film is to serve as a white background for the glass 9 and to transmit light, the bottom of the base frame 1d1 is fixedly connected with a collecting frame 3, the top surface of the collecting frame 3 is lower than the bottom surface of the glass 9, the cross-section of the collecting frame 3 is larger than the horizontal plane of the glass 9, so that when the glass 9 is tilted, the fine powder on the glass 9 will slide into the collecting frame 3 instead of sliding out, the cross-section of the top of the collecting frame 3 is larger than the cross-sectional area of ​​the bottom, and the collecting frame 3 is in an inverted terrace shape as a whole, so that after the fine powder falls into the collecting frame 3, it will automatically slide along the inner wall of the collecting frame 3 to the bottom of the inner cavity of the collecting frame 3 for accumulation, an XY-axis slide module 4 is installed outside the collecting frame 3, a powder discharge pipe 6 is installed on the head 5 of the XY-axis slide module 4, a powder conveying device 7 is installed at the bottom of the collecting frame 3, the input end of the powder conveying device 7 is connected to the inner cavity of the collecting frame 3, and the output end of the powder conveying device 7 is connected to the powder discharge pipe 6 through a hose 8; After the robot arm in the prior art moves the glass 9 onto the electric suction cup 1b, the electric suction cup 1b is started to suck the glass 9. At this time, the glass 9 is in a horizontal state. Then the powder conveying device 7 and the XY-axis slide module 4 are started. The fine powder in the collection frame 3 is input into the hose 8 through the powder conveying device 7, and then discharged from the powder outlet pipe 6 to the surface of the glass 9. The XY-axis slide module 4 will drive the powder outlet pipe 6 to move directly above the glass 9 through the machine head 5, so that the fine powder is gradually laid on the surface of the glass 9. Then the output shafts of the first hydraulic cylinder 1d5 and the second hydraulic cylinder 1d6 are intermittently slightly shortened and extended, so that the glass 9 swings slightly, so that the fine powder laid on the surface of the glass 9 is smoother on the surface of the glass 9, and the fine powder will enter the scratches on the glass 9. Then the second hydraulic cylinder 1d6 is reset, and the output shaft of the first hydraulic cylinder 1d5 is extended. The first hydraulic cylinder 1d5 will drive the first shaft 1d2 to rotate around the X-axis. The first shaft 1d2 passes The connecting plate 1d3 drives the second shaft 1d4, thereby driving the mounting frame 1c to rotate around the X-axis. At this time, the glass 9 will tilt at a small angle, and the fine powder on the glass 9 will slide into the collection frame 3. Because the scratch on the glass 9 has a certain depth, and the particle size of the fine powder is smaller than the depth and width of the scratch, the fine powder in the scratch will be stuck in the scratch instead of completely sliding off the glass 9. Then the output shaft of the first hydraulic cylinder 1d5 is reset, and the light-emitting board 1a emits light. Because the top surface of the light-emitting board 1a has a white light-transmitting film, the light-emitting board 1a will emit light and serve as a white background. Since there is fine powder in the scratch, when the light emitted by the light-emitting board 1a is directed to the glass 9, the fine powder will block the light. Therefore, the scratch is darker in color than the flawless part of the glass 9, forming an obvious difference. At this time, the camera 2 in the prior art takes a picture of the surface of the glass 9, and then the scratch on the surface of the glass 9 is identified in the manner of the prior art; Afterwards, in order to avoid the different directions of scratches, which result in only one part of a scratch having obvious fine powder and the other part not being obvious, and to improve the detection accuracy, the fine powder is spread on the glass 9 according to the above steps again, except that this time the output shaft of the second hydraulic cylinder 1d6 is extended to tilt the glass 9 around the Y axis. After resetting, another photo-taking intelligent recognition is performed, and a comprehensive detection comparison is performed in combination with the previous recognition.

[0020] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are exemplary only. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application.

Claims

1. An automatic optical glass defect detection device, used for detecting scratches on the surface of glass (9), comprising a platform (1) for placing the glass (9), and a camera (2) installed directly above the glass (9), the camera (2) taking a picture of the surface of the glass (9) to intelligently identify the scratches displayed, characterized in that: The platform (1) comprises a light-emitting panel (1a), electric suction cups (1b) fixedly mounted at four corners of the light-emitting panel (1a), a mounting frame (1c) mounted together with the bottom of the electric suction cups (1b), and a dumping assembly (1d) mounted at the bottom of the mounting frame (1c); the surface of the glass (9) is paved with fine powder; The fine powder spread on the surface of the glass (9) will fall into the scratch, the tilting component (1d) drives the horizontal glass (9) to tilt so that the fine powder on the surface of the glass (9) slides down and resets, while the fine powder remains in the scratch, the light-emitting board (1a) emits light and serves as a background, the fine powder in the scratch blocks the light emitted by the light-emitting board (1a) to form a scratch shadow that is different from the glass (9), and the camera (2) takes a picture of the surface of the glass (9) to intelligently identify the scratch.

2. The automatic optical glass defect detection device according to claim 1, characterized in that: The tipping assembly (1d) comprises a base frame (1d1), a first axis (1d2) on the base frame (1d1) that rotates around an X-axis, connecting plates (1d3) fixedly mounted at both ends of the first axis (1d2), a second axis (1d4) fixedly mounted between the two connecting plates (1d3), a first hydraulic cylinder (1d5) rotatably mounted between the first axis (1d2) and the base frame (1d1), and a second hydraulic cylinder (1d6) rotatably mounted between the first axis (1d2) and the mounting frame (1c), wherein the mounting frame (1c) is rotatably connected to the second axis (1d4) around a Y-axis.

3. The automatic optical glass defect detection device according to claim 2, characterized in that: A collecting frame (3) is fixedly connected to the bottom of the base frame (1d1); the top surface of the collecting frame (3) is lower than the bottom surface of the glass (9); and the cross-section of the collecting frame (3) is larger than the horizontal surface of the glass (9).

4. The automatic optical glass defect detection device according to claim 3, characterized in that: An XY-axis slide module (4) is installed outside the collection frame (3), and a powder outlet pipe (6) is installed on the head (5) of the XY-axis slide module (4).

5. The automatic optical glass defect detection device according to claim 4, characterized in that: A powder conveying device (7) is installed at the bottom of the collecting frame (3); the input end of the powder conveying device (7) is connected to the inner cavity of the collecting frame (3); and the output end of the powder conveying device (7) is connected to the powder outlet pipe (6) via a hose (8).

6. The automatic optical glass defect detection device according to claim 3, characterized in that: The cross-section of the top of the collecting frame (3) is larger than the cross-section of the bottom, and the collecting frame (3) is in an inverted terrace shape as a whole.

7. The automatic optical glass defect detection device according to claim 1, characterized in that: The particle size of the fine powder is 0.01 to 0.45 mm.

8. The automatic optical glass defect detection device according to claim 1, characterized in that: The top surface of the light-emitting panel (1a) is provided with a white light-transmitting film.

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