Visual detector for online glass defect detection

Abstract

The utility model relates to a visual detector for on-line glass defect detection, which is arranged on one opposite side of a vertical glass conveyor and comprises a base, a frame body is arranged at the top of the base, the opposite side face of the frame body facing the vertical glass conveyor is an open side, the open side is parallel to glass on the vertical glass conveyor, and the vertical glass conveyor is arranged on the open side. The base and the frame body jointly form a main frame body of the visual detector; light shields are arranged on the other side faces of the frame body, a plurality of shooting environment exposure lamps are arranged in the light shields, and the frame body forms a semi-open visual environment facing the vertical glass conveyor through the light shields and the shooting environment exposure lamps; a plurality of industrial cameras are arranged in the middle of the frame body in the vertical direction, the industrial cameras point to glass on the vertical glass conveyor, and the industrial cameras are in communication connection with an external control end and a displayer. The frame body is provided with a glass film surface recognizer used for distinguishing the type of detected glass, and the glass film surface recognizer corresponds to the input side of the vertical glass conveyor in the glass conveying direction.

Description

Technical Field

[0001] The utility model relates to the field of automated hollow energy-saving glass processing equipment manufacturing, in particular to a visual inspection instrument for online glass defect detection. Background Art

[0002] With the rapid development of the hollow glass energy-saving industry, the demand for automation level of glass deep processing equipment is getting higher and higher. However, in the current hollow glass production, the inspection of glass defects and cleanliness still relies on manual visual inspection in a strong light environment. The defective products and labor cost investment caused by defect detection omissions have always troubled hollow glass manufacturers. Therefore, the market is in urgent need of equipment that can realize online automatic detection, identification, and calibration of defect positions while avoiding manual visual inspection in a strong light environment. Utility Model Content

[0003] In view of the above technical problems in the related art, the utility model proposes a visual inspection instrument for online glass defect detection, which can overcome the above deficiencies in the prior art.

[0004] In order to achieve the above technical objectives, the technical solution of the utility model is implemented as follows:

[0005] The utility model relates to a visual inspection instrument for online glass defect detection, the visual inspection instrument is placed on the side opposite to the vertical glass conveyor, the visual inspection instrument comprises a base, a frame is provided on the top of the base, the side opposite to the vertical glass conveyor is an open side, the open side is parallel to the glass on the vertical glass conveyor, the base and the frame together constitute the main frame of the visual inspection instrument;

[0006] The frame is provided with a light shield on the other side not facing the vertical glass conveyor, and a plurality of shooting environment exposure lamps are provided inside the light shield. The frame forms a semi-open visual environment facing the vertical glass conveyor through the light shield and the shooting environment exposure lamps;

[0007] The frame is provided with a plurality of industrial cameras along the middle vertical direction thereof, the lenses of the industrial cameras are directed toward the glass on the vertical glass conveyor, and the industrial cameras are communicatively connected with an external control terminal and a display;

[0008] The frame is provided with a glass film surface identifier for distinguishing the types of detected glass, and the glass film surface identifier corresponds to the input side of the glass conveying direction of the vertical glass conveyor.

[0009] Furthermore, the frame is also provided with a shooting start / stop sensor cooperating with the industrial camera, the industrial camera is communicatively connected with the shooting start / stop sensor, and the shooting start / stop sensor provides a shooting start / stop signal for the industrial camera.

[0010] Furthermore, the industrial camera performs continuous high-frequency exposure shooting of the glass conveyed by the vertical glass conveyor within the signal interval of the shooting start and stop sensor, and transmits the shooting results to the control end for processing and real-time imaging display on the display.

[0011] Furthermore, the control end can process the shooting results and compare them with the glass defect database, screen out the glass defects that exceed the tolerance, mark them at the corresponding positions of the imaging, and display them on the display. This can be achieved by using the existing technology, and it is not an improvement on the operation method.

[0012] Furthermore, the shooting start and stop sensor is located above the glass film surface identifier.

[0013] Furthermore, the frame is also provided with a transmission speed feedback encoder which can provide real-time feedback of the glass travel size, and the transmission speed feedback encoder is connected to the transmission wheel of the vertical glass conveyor.

[0014] Furthermore, the glass film surface identifier is preferably a Low-E glass film surface identifier.

[0015] Furthermore, the distances between any two adjacent industrial cameras are equal.

[0016] Furthermore, the frame is provided with a guide rail along the middle vertical direction thereof, and the industrial camera is slidably connected to the guide rail.

[0017] Furthermore, the industrial camera preferably adopts an ultra-high-definition, high-frequency, wide-angle industrial camera.

[0018] Furthermore, the base preferably adopts a stable triangular-shaped cross-section.

[0019] Furthermore, the height of the visual inspection instrument is higher than the height of the vertical glass conveyor to ensure that the glass does not vertically exceed the shooting area of ​​the visual inspection instrument.

[0020] The beneficial effects achieved by this design are: this product has a simple structure and is easy to maintain. It can screen out defective glass raw materials before glass synthesis, thereby solving the problem of slowing down the production line output speed caused by the production rhythm. At the same time, it effectively reduces the chance of defective and unqualified products entering the market, reduces the labor input and defective scrap rate caused by these problems, and meets the special needs of various sizes of glass, especially ultra-large panel glass, for the reliability of online defect detection, providing lasting impetus for the continued development of the hollow energy-saving industry.

[0021] This product is designed and developed to be stable and reliable, and is easy to cooperate with the vertical glass conveyor 1 to form a hollow glass production line, supplemented by the relevant structure of the industrial camera; and the imaging results of the glass on the production line by the industrial camera are connected with the control end through communication to achieve data exchange and calculation. The control end can establish a background defective glass comparison database, and make real-time judgments on the glass detection of the response production line, thus having the following advantages:

[0022] (A). In order to meet the identification requirements during the glass transmission process, a high-frequency high-definition industrial camera is used to continuously expose and shoot the glass passing through the camera shooting area at high frequency, and imaging processing is performed after the shooting is completed.

[0023] (B). In response to the inspection requirements during glass transmission, a Low-E glass identifier is arranged at the front end of the inspection zone, and glass detection sensors are arranged at the start and end positions of the inspection and transmission zone, and an encoder is connected to the transmission wheel. During online production, the glass is cleaned by a cleaning machine and then transmitted through the inspection zone. First, the Low-E glass identifier is used to determine whether the glass to be inspected is Low-E coated glass. The glass detection sensors at the start and end positions of the inspection zone provide shooting start and stop signals for the high-frequency high-definition industrial camera. The start and end signal intervals and the analog signal output by the encoder connected to the transmission wheel can be used to calculate the length of the glass. In conjunction with the camera exposure frequency, the continuous shooting of the glass when it passes through the inspection area can be visually reproduced, and micron-level line, point, and surface shadows can be identified in the imaging, and the obtained shadows can be compared with the background defect database for screening.

[0024] (C) In response to the calibration requirements of glass defect detection results, when the shadow detected is compared with the background defect database and the result exceeds the allowable value, the shadow exceeding the allowable value will be highlighted on the display image, and there will be an alarm reminder and text prompt. The detected glass will stop in the process section after the defect detection area and wait for processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described in detail below with reference to the accompanying drawings.

[0026] Figure 1 It is a stereoscopic diagram of the visual inspection instrument described in the embodiment of the utility model.

[0027] Figure 2 This is a main perspective diagram of the usage scenario of the visual inspection instrument and the glass conveyor described in the embodiment of the utility model.

[0028] Figure 3 This is a three-dimensional perspective diagram of the use scenario of the visual inspection instrument and the glass conveyor described in the embodiment of the utility model.

[0029] Figure 4It is a side view of the visual inspection instrument and the glass conveyor described in the embodiment of the utility model.

[0030] Figure 5 for Figure 4 B in the middle points to the enlarged image in the dotted circle.

[0031] Figure 6 This is a schematic diagram of the open side of the visual inspection instrument according to an embodiment of the present invention facing the glass conveyor.

[0032] Figure 7 for Figure 6 The AA partial cross-section view in the figure shows the glass film surface identifier, transmission speed feedback encoder, and shooting start and stop sensor.

[0033] Figure 8 This is a schematic diagram of the positions of the glass conveyor and the visual inspection instrument in the production line according to an embodiment of the utility model.

[0034] In the figure: 1. Glass conveyor; 2. Visual inspection instrument; 3. Base; 4. Frame; 5. Light shield; 6. Shooting environment exposure light; 7. Industrial camera; 8. Glass film surface identifier; 9. Transmission speed feedback encoder; 10. Shooting start and stop sensor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0036] like Figure 1-8 As shown, in order to facilitate understanding of the above technical solution of the present invention, the above technical solution of the present invention is described in detail below through specific usage methods.

[0037] In specific use, the visual inspection instrument for online glass defect detection described in the utility model, the visual inspection instrument 2 is placed on the opposite side of the vertical glass conveyor 1, the visual inspection instrument 2 includes a base 3, a frame 4 is provided on the top of the base 3, the side of the frame 4 facing the vertical glass conveyor 1 is an open side, the open side is parallel to the glass on the vertical glass conveyor 1, and the base 3 and the frame 4 together constitute the main frame of the visual inspection instrument 2;

[0038] The frame 4 is provided with a light shield 5 on the other side not facing the vertical glass conveyor 1, and a plurality of shooting environment exposure lamps 6 are provided inside the light shield 5. The frame 4 forms a semi-open visual environment facing the vertical glass conveyor 1 through the light shield 5 and the shooting environment exposure lamps 6;

[0039] The frame 4 is provided with a plurality of industrial cameras 7 along the middle vertical direction thereof, the lenses of the industrial cameras 7 are directed toward the glass on the vertical glass conveyor 1, and the industrial cameras 7 are connected to the external control terminal and the display for communication;

[0040] The frame 4 is provided with a glass film surface identifier 8 for distinguishing the type of the detected glass, and the glass film surface identifier 8 corresponds to the input side of the vertical glass conveyor 1 in the glass conveying direction.

[0041] In a specific embodiment, the frame 4 is preferably provided with a shading hood 5 on its left and right sides, and may also be provided with a shading hood 5 on its top surface and rear side surface as needed, as long as a semi-open visual environment can be achieved. The specific setting of the shading hood 5 here can be achieved using existing technology.

[0042] In a specific embodiment, the frame 4 is also provided with a shooting start / stop sensor 10 that cooperates with the industrial camera 7 . The industrial camera 7 is communicatively connected to the shooting start / stop sensor 10 , and the shooting start / stop sensor 10 provides a shooting start / stop signal to the industrial camera 7 .

[0043] In a specific embodiment, the industrial camera 7 continuously performs high-frequency exposure shooting of the glass conveyed by the vertical glass conveyor 1 within the signal interval of the shooting start and stop sensor 10, and transmits the shooting results to the control end for processing and real-time imaging and display on the display. This can be achieved by using existing technology, and it is not an improvement on the operation method.

[0044] In a specific embodiment, the control end can process the shooting results and compare them with the glass defect database, screen out the glass defects that exceed the tolerance, mark them at the corresponding positions of the imaging, and display them on the display.

[0045] In a specific embodiment, the shooting start / stop sensor 10 is located above the glass film surface identifier 8 .

[0046] In a specific embodiment, the frame 4 is also provided with a transmission speed feedback encoder 9 which can provide real-time feedback on the travel size of the glass. The transmission speed feedback encoder 9 is connected to the transmission wheel of the vertical glass conveyor 1 .

[0047] In a specific embodiment, the glass film surface identifier 8 is preferably a Low-E glass film surface identifier.

[0048] In a specific embodiment, the distances between any two adjacent industrial cameras 7 are equal.

[0049] In a specific embodiment, the frame 4 is provided with a guide rail along the middle vertical direction thereof, and the industrial camera 7 is slidably connected to the guide rail.

[0050] In a specific embodiment, the industrial camera 7 preferably adopts an ultra-high-definition, high-frequency, wide-angle industrial camera.

[0051] In a specific embodiment, the base 3 preferably adopts a stable triangular-shaped cross-section.

[0052] In a specific embodiment, the height of the visual inspection instrument 2 is higher than the height of the vertical glass conveyor 1 to ensure that the glass does not vertically exceed the shooting area of ​​the visual inspection instrument 2 .

[0053] Specific working principle: The visual inspection instrument 2 for online glass defect detection proposed in this application has a height that matches the height of the vertical glass conveyor 1 and is placed on the opposite side of the vertical glass conveyor. The main frame of the visual inspection instrument 2 includes a base 3 and a frame 4; the base 3 preferably adopts a stable triangular cross-section, and the height of the base 3 can be customized and adjusted according to the height of the conveying wheel of the insulating glass production line; a light shield 5 is provided on the outside of the frame 4 to form a semi-open visual environment facing the glass conveying direction of the vertical glass conveyor 1, and a shooting environment exposure light 6 is provided inside the light shield 5 to provide sufficient shooting light source.

[0054] The frame 4 may be provided with multiple groups of industrial cameras 7 with equal spacing in the middle vertical direction. The industrial cameras 7 are preferably ultra-high-definition high-frequency wide-angle industrial cameras. On the input side of the glass transmission direction, the frame 4 may be provided with a glass film surface identifier 8 for distinguishing the type of glass to be detected. The glass film surface identifier 8 is preferably a Low-E glass film surface identifier. The frame 4 may also be provided with a transmission speed feedback encoder 9 to provide real-time feedback on the glass travel size. The transmission speed feedback encoder 9 is connected to the transmission wheel of the vertical glass conveyor 1.

[0055] The frame 4 is provided with a shooting start and stop sensor 10 which cooperates with the industrial camera 7. The industrial camera 7 performs continuous high-frequency exposure shooting within the signal interval of the shooting start and stop sensor 10, and displays the shooting results in real-time imaging on the display of the control end. After comparison between the control end background and the glass defect database, the glass defects exceeding the tolerance are screened out and marked at the corresponding position of the display imaging, thereby completing accurate detection.

[0056] In response to the identification requirements during the glass transmission process, the industrial camera 7 uses a high-frequency high-definition industrial camera to perform continuous high-frequency exposure shooting of the glass transmitted through the camera shooting area, and performs imaging processing after the shooting is completed.

[0057] In view of the detection requirements during the glass transmission process, a glass film surface identifier 8 is arranged at the front end of the glass feeding section (i.e., the input side of the glass transmission direction), and the glass film surface identifier 8 is preferably a Low-E glass film surface identifier, and the glass film surface identifier 8 corresponds to the input side of the glass transmission direction of the vertical glass conveyor 1. At the start and end positions of the detection transmission section, the frame 4 is also provided with a shooting start and stop sensor 10 that cooperates with the industrial camera 7. The frame 4 is also provided with a transmission speed feedback encoder 9 that can provide real-time feedback on the glass travel size, and the transmission speed feedback encoder 9 is connected to the transmission wheel of the vertical glass conveyor 1.

[0058] During online production, the glass is cleaned by a cleaning machine and then conveyed through the inspection area. First, the Low-E glass film surface identifier is used to determine whether the glass to be inspected is Low-E coated glass. When it officially enters the inspection area, the shooting start and stop sensor 10 provides the industrial camera 7 with a shooting start and stop signal. The start and stop signal intervals issued by the shooting start and stop sensor 10 and the analog signal output by the transmission speed feedback encoder 9 can be used together to calculate the length of the glass. Combined with the exposure frequency of the industrial camera 7, the continuous shooting of the glass when it passes through the inspection area can be used for visual reproduction imaging, and micron-level line, point, and surface shadows can be identified in the imaging, and the obtained shadows can be compared with the background defect database for screening.

[0059] In response to the calibration requirements of glass defect detection results, when the comparison result between the detected shadow and the background defect database exceeds the allowable value, the shadow exceeding the allowable value will be highlighted on the image of the control end display, and there will be an alarm reminder and text prompt. The detected glass will stop in the process section after the defect detection area and wait for processing.

[0060] In summary, this product adopts the above-mentioned unique design. This product has a simple structure and is easy to maintain. It can screen out defective glass raw materials before glass synthesis, solve the problem of slowing down the output speed of the production line caused by this, and effectively reduce the probability of defective and unqualified products entering the market, reduce the labor input and defective scrap rate caused by these problems, and meet the special needs of various sizes of glass, especially ultra-large panel glass, for the reliability of online defect detection, providing lasting impetus for the continued development of the hollow energy-saving industry.

[0061] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A visual inspection instrument for online glass defect detection, wherein the visual inspection instrument (2) is placed on the opposite side of a vertical glass conveyor (1), characterized in that: The visual inspection instrument (2) comprises a base (3), a frame (4) is provided on the top of the base (3), the side of the frame (4) facing the vertical glass conveyor (1) is an open side, and the open side is parallel to the glass on the vertical glass conveyor (1), and the base (3) and the frame (4) together constitute the main frame of the visual inspection instrument (2); The frame (4) is provided with a light shield (5) on the other side, and a plurality of shooting environment exposure lamps (6) are provided inside the light shield (5). The frame (4) forms a semi-open visual environment facing the vertical glass conveyor (1) through the open side, the light shield (5) and the shooting environment exposure lamps (6); The frame (4) is provided with a plurality of industrial cameras (7) along the middle vertical direction thereof, the lenses of the industrial cameras (7) are directed toward the glass on the vertical glass conveyor (1), and the industrial cameras (7) are communicatively connected with an external control terminal and a display; The frame (4) is provided with a glass film surface identifier (8) for distinguishing the type of detected glass, and the glass film surface identifier (8) corresponds to the input side of the glass conveying direction of the vertical glass conveyor (1).

2. The visual inspection instrument according to claim 1, characterized in that: The frame (4) is also provided with a shooting start / stop sensor (10) that cooperates with the industrial camera (7); the industrial camera (7) is communicatively connected with the shooting start / stop sensor (10); and the shooting start / stop sensor (10) provides a shooting start / stop signal for the industrial camera (7).

3. The visual inspection instrument according to claim 2, characterized in that: The industrial camera (7) performs continuous high-frequency exposure photography of the glass conveyed by the vertical glass conveyor (1) within the signal interval of the shooting start and stop sensor (10), and transmits the photography results to the control end for processing and real-time imaging display on the display.

4. The visual inspection instrument according to claim 3, characterized in that: The control end can process the shooting results and compare them with the glass defect database, screen out the glass defects that exceed the tolerance, mark them at the corresponding positions of the imaging, and display them on the display.

5. The visual inspection instrument according to claim 1, characterized in that: The frame (4) is also provided with a transmission speed feedback encoder (9) which can provide real-time feedback on the travel size of the glass, and the transmission speed feedback encoder (9) is connected to the transmission wheel of the vertical glass conveyor (1).

6. The visual inspection instrument according to claim 1, characterized in that: The glass film surface identifier (8) is a Low-E glass film surface identifier.

7. The visual inspection instrument according to claim 1, characterized in that: The distance between any two adjacent industrial cameras (7) is equal.

8. The visual inspection instrument according to claim 1, characterized in that: The frame (4) is provided with a guide rail along the middle vertical direction thereof, and the industrial camera (7) is slidably connected to the guide rail.

9. The visual inspection instrument according to claim 1, characterized in that: The industrial camera (7) is an ultra-high-definition, high-frequency, wide-angle industrial camera.

10. The visual inspection instrument according to claim 1, characterized in that: The base (3) has a stable triangular cross section.

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