Online visual detection system for surface defects of hollow glass

Abstract

The invention relates to the technical field of surface defect detection, and provides a hollow glass surface defect online visual detection system, which is installed at the front end of a hollow glass production line, the hollow glass production line comprises a support frame body, an inclined support plate is arranged on the support frame body, and a plurality of rollers are arranged on the support plate. A plurality of groove-shaped wheels used for conveying glass are arranged at the bottom of the supporting frame body, a visual inspection mechanism is arranged on the supporting frame body, a mounting frame is arranged on the supporting plate, a shielding mechanism and a side edge measuring mechanism are arranged on the mounting frame, and the side edge measuring mechanism is in driving connection with the shielding mechanism through a guide linkage mechanism. The system has the beneficial effects that the system is arranged between a glass cleaning and drying step and a spacing bar bonding step, surface defect detection is carried out on the cleaned and dried glass, the detection accuracy is improved, the glass can be in a vertical state during detection, monochromatic shading is carried out on the rear side of the glass, and the detection accuracy is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of visual inspection of glass surfaces. Specifically, it relates to an on-line visual inspection system for surface defects of insulating glass. Background Art

[0002] During the production process of insulating glass, generally, the following steps are included: cleaning, drying, laminating, spacer bar bonding, gap caulking, etc. of the glass sheets. However, there will be products with surface defects after production, which is equivalent to wasting raw materials and productivity, etc.

[0003] In the prior art, single glass sheets are pre-inspected before entering the glass production line. However, since the glass is not cleaned, the presence of some dirt on the surface also affects the detection accuracy. Moreover, with a separate inspection step, the coordination of the entire production process is not high. After our research and development, the inspection step is set on the production line after the glass is cleaned and dried, which improves the coordination of the production process. However, since the glass is in an inclined state during transportation and is supported by rollers, it causes a certain degree of occlusion, which also affects the detection effect and reduces the detection accuracy. Summary of the Invention

[0004] The present application proposes an on-line visual inspection system for surface defects of insulating glass. This system is set on the production line of insulating glass, between the glass cleaning and drying step and the spacer bar bonding step, to perform surface defect detection on the cleaned and dried glass, improving the detection result and the coordination of the entire production process. At the same time, during the detection, the glass can be in a vertical state, and monochromatic light shading is performed on the rear side of the glass, further improving the detection accuracy.

[0005] To this end, the present application provides an on-line visual inspection system for surface defects of insulating glass, which is installed at the front end of the insulating glass production line. The insulating glass production line includes a support frame body. An inclined support plate is provided on the support frame body, and a plurality of rollers are provided on the support plate. A plurality of trough-shaped wheels for transporting glass are provided at the bottom of the support frame body. A visual inspection mechanism is provided on the support frame body, and a mounting frame is provided on the support plate. A shielding mechanism and a side measurement mechanism are provided on the mounting frame. The side measurement mechanism is drivingly connected to the shielding mechanism through a guiding linkage mechanism.

[0006] The basic principle of this embodiment is as follows: The visual inspection system is installed between the drying device and the spacer bonding device of the insulating glass production line. During the production process, on-line visual inspection of the glass surface is carried out, eliminating the need for separate inspection in advance, improving the coordination of the production process. At the same time, inspecting the cleaned glass also improves the inspection accuracy. Meanwhile, the side measurement mechanism can detect the size of the glass. When detecting, the side measurement mechanism can make the glass vertical. At the same time, while guiding the glass into the side measurement mechanism through the guiding linkage mechanism, the back of the glass is monochromatically blocked, further improving the inspection result.

[0007] Preferably, the visual inspection mechanism includes a slide rail provided at the bottom of the support frame and a telescopic power member. An installation plate is slidably provided on the slide rail. The installation plate is provided with an array of image acquisition cameras, and further includes an image processor connected to the image acquisition cameras. The telescopic power member is connected to the installation plate.

[0008] By adopting the above technical solution: The telescopic power member can drive the installation plate to reciprocate left and right, thereby driving the array of image acquisition cameras to reciprocate, enabling scanning visual inspection of the glass surface. After the image information is processed by the image processor, it can be determined whether there are defects on the glass.

[0009] Preferably, the support frame includes two vertical beams fixed to the top of the support frame. The tops of the two vertical beams are connected by a cross plate. The shielding mechanism includes connecting plates fixed to each vertical beam. A winding drum with a winding function is rotatably connected between the two connecting plates. A single-color shielding cloth is provided on the winding drum. By adopting the above technical solution: Through the pulling of the guiding linkage mechanism, the single-color shielding cloth can be unfolded during the downward movement of the side measurement mechanism to block rollers, etc., making the back of the glass present a single unobstructed color, improving the accuracy of the glass visual inspection. After the inspection is completed, during the return of the side inspection mechanism, since the winding drum has an automatic winding function, it can automatically wind the single-color shielding cloth and wait for the inspection of the next piece of glass.

[0010] Preferably, the side measurement mechanism includes a reciprocating driving member provided on the cross plate. The telescopic rod of the reciprocating driving member is connected to an adjusting assembly. A measuring assembly is connected to the adjusting assembly. The guiding linkage mechanism is provided on the measuring assembly. A sliding assembly is also provided between the two rows of rollers on the support plate.

[0011] By adopting the above technical solution: The relative distance of the measuring assembly can be adjusted through the adjusting assembly to adapt to the inspection of glass with different widths. The measuring assembly is used to detect whether the left and right sides of the glass are flush and whether the size meets the standard, etc. The sliding assembly facilitates the downward sliding of the guiding linkage mechanism and prevents jamming.

[0012] Preferably, the adjusting assembly includes an adjusting plate connected to the telescopic rod. An adjusting groove is provided on the adjusting plate. Two adjusting blocks are connected to the adjusting plate through adjusting bolts, and the measuring assembly is installed on the adjusting blocks.

[0013] By adopting the above technical solution: A set of measuring assemblies are installed on each adjusting block. Through the cooperation of the adjusting bolts and the adjusting groove, the relative distance between the two measuring assemblies can be adjusted, so as to be applicable to glasses of different widths.

[0014] Preferably, the measuring assembly includes measuring groove plates connected to each adjusting block. The notches of the two measuring groove plates face each other, and a plurality of infrared sensors arranged in a column are embedded inside the measuring groove plates.

[0015] Preferably, the sliding assembly includes a guiding plate with an inclined surface portion provided on the supporting plate. The inclination direction of the inclined surface portion is the same as that of the supporting plate, and the height of the inclined surface portion relative to the supporting plate is not higher than the height of the roller relative to the supporting plate.

[0016] Preferably, the guiding linkage mechanism includes a guiding assembly for guiding the glass into the two measuring groove plates and a linkage assembly for pulling and covering the single-color cloth provided above the guiding assembly.

[0017] Preferably, the guiding assembly includes an elastic guiding arc plate provided at the lower part of the measuring groove plate, and a guiding inlet is provided at the lower end of the measuring groove plate.

[0018] Preferably, the linkage assembly includes a pull rod provided at the lower part of the measuring groove plate. The pull rod is connected to the single-color covering cloth, and the lower part of the pull rod is connected to the elastic guiding arc plate.

[0019] By adopting the above technical solution: When the reciprocating power member pushes the adjusting plate to move downward, the measuring groove plate follows and moves downward. The elastic guiding arc plate contacts the upper side of the glass. When the measuring groove plate continues to move downward, the elastic guiding arc plate can gradually guide the glass into the guiding inlet, and thus into the space between the two measuring groove plates. The glass gradually becomes vertical. During the downward movement of the measuring groove plate, the single-color covering cloth can be synchronously pulled and unfolded by the pull rod to cover the rollers, etc., so that the back of the glass presents a single background, which is convenient for accurate visual inspection. The inclined surface portion on the guiding plate facilitates the elastic guiding arc plate to slide over each roller and prevent jamming.

[0020] The working principle and beneficial effects of this application are: 1. Install this vision inspection system between the drying device and the spacer bonding device on the insulating glass production line. During production, conduct on-line vision inspection on the glass surface without the need for separate inspection in advance, improving the coordination of the production process. At the same time, inspecting the washed glass also improves the inspection accuracy. Meanwhile, the side measurement mechanism can detect the size of the glass. When inspecting, the side measurement mechanism can make the glass vertical. At the same time, while guiding the glass into the side measurement mechanism through the guiding linkage mechanism, the back of the glass is monochromatically blocked, further improving the inspection result.

[0021] 2. Through the pulling of the guiding linkage mechanism in this application, during the downward movement of the side measurement mechanism, the monochromatic blocking cloth can be unfolded to block rollers, etc., making the back of the glass present a single unblocked color, improving the accuracy of the glass vision inspection. After the inspection is completed, during the return of the side inspection mechanism, since the winding drum has an automatic winding function, it can automatically wind up the monochromatic blocking cloth and wait for the inspection of the next piece of glass.

[0022] 3. When the reciprocating power member pushes the adjusting plate downward, the measuring groove plate follows and moves downward. The elastic guiding arc plate contacts the upper side of the glass. When the measuring groove plate continues to move downward, the elastic guiding arc plate can gradually guide the glass into the guiding inlet and then into the space between the two measuring groove plates, and the glass gradually becomes vertical. During the downward movement of the measuring groove plate, the monochromatic blocking cloth can be synchronously pulled and unfolded through the pull rod to block rollers, etc., making the back of the glass present a single background, facilitating accurate vision inspection. The inclined surface part on the guiding plate facilitates the elastic guiding arc plate to slide over each roller and prevent jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further elaborates on this application in detail in conjunction with the drawings and specific embodiments.

[0024] Figure 1 is a schematic structural diagram of the overall production line of the embodiment of this application; Figure 2 is a top view structural diagram of the cleaning device of the embodiment of this application; Figure 3 is a partial front view structural diagram of the on-line vision inspection system and the support frame body of the embodiment of this application; Figure 4 is for the embodiment of this application Figure 1 side view structural diagram; Figure 5 is a structural diagram of the measuring groove plate of the embodiment of this application.

[0025] The reference signs in the drawings are as follows: 100, Insulating glass production line; 110, Loading device; 120, Cleaning device; 121, Opposing rollers; 122, Cleaning brushes; 123, Spray nozzles; 130, Drying device; 140, Spacer bar gluing device; 150, Unloading device; 160, Support frame body; 170, Support plate; 180, Rollers; 190, Grooved wheels; 200, Visual inspection mechanism; 210, Slide rails; 220, Telescopic power member; 230, Mounting plate; 240, Image acquisition cameras; 250, Image processors; 260, Displays; 300, Mounting frame; 310, Vertical beams; 320, Horizontal plates; 400, Shielding mechanism; 410, Connecting plates; 420, Drums; 430, Monochromatic shielding cloth; 500, Side measurement mechanism; 510, Reciprocating drive member; 520, Adjusting plate; 521, Adjusting grooves; 522, Adjusting bolts; 523, Adjusting blocks; 530, Measuring groove plates; 531, Infrared sensors; 540, Guide plates; 541, Inclined surfaces; 600, Guide linkage mechanism; 610, Elastic guide arc plates; 620, Guide inlets; 630, Tie rods. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0027] Refer to Figure 1 and Figure 2, the insulating glass production line 100 in this embodiment sequentially includes a glass loading device 110, a cleaning device 120, a drying device 130, a spacer bar gluing device 140, and a blanking device 150 according to the production process. The on-line visual inspection system in this embodiment is installed between the drying device 130 and the spacer bar bonding device. Both the loading device 110 and the blanking device 150 use automatic loading robots. When producing insulating glass, the glass is loaded by the loading device 110, and the glass is conveyed through the grooved wheels 190 at the bottom of the support frame 160. The multiple grooved wheels 190 are driven and connected by a synchronous belt. A driving motor is provided on some of the grooved wheels 190 to drive the multiple grooved wheels 190 to rotate synchronously for conveying the glass. First, the glass is cleaned by the cleaning device 120. The cleaning device 120 adopts a multi-pair roller 121 method. A cleaning brush 122 is provided on the outer peripheral side of the roller body. A plurality of spray heads 123 are provided between the multiple groups of pairs of rollers 121. The glass passes through between the two roller bodies, and the spray heads 123 spray water to clean the glass. The cleaned glass is dried by drying, and the drying adopts a steam box method. The cleaned and dried glass is subjected to surface defect detection by the on-line visual inspection system in this embodiment. The qualified glass proceeds to the next process for lamination, bonding of the spacer bar, and gluing. Then, the insulating glass is blanked by the blanking device 150. The glass with surface defects can be blanked by a separate robot.

[0028] Referring to Figure 3 and Figure 4 , specifically for the on-line visual inspection system for surface defects of insulating glass in this embodiment, it is installed at the front end of the insulating glass production line 100, that is, between the drying device 130 and the spacer bar bonding device. The insulating glass production line 100 therein includes a support frame 160. The support frame 160 adopts a light steel frame. An inclined support plate 170 is provided on the support frame 160. A plurality of rollers 180 for rolling and supporting the glass are provided on the support plate 170. During the process of conveying the glass, the glass rolls on the circumferential side of the rollers 180 and is conveyed in an inclined state. A plurality of grooved wheels 190 for conveying the glass are provided at the bottom of the support frame 160. The multiple grooved wheels 190 are arranged side by side. A visual inspection mechanism 200 is provided on the support frame 160, and a mounting frame 300 is provided on the support plate 170. A shielding mechanism 400 and a side measurement mechanism 500 are provided on the mounting frame 300. The side measurement mechanism 500 is driven and connected to the shielding mechanism 400 through a guiding linkage mechanism 600.

[0029] The basic principle of this embodiment is as follows: Install this vision detection system between the drying device 130 and the spacer bonding device of the insulating glass production line 100, and perform on-line vision detection on the glass surface during the production process to detect whether there are surface defects on the glass. If there are surface defects, directly carry out blanking without separate detection beforehand, which improves the coordination of the production process. At the same time, detect the glass after cleaning. Since surface dust and impurities are removed, the detection accuracy is also improved. At the same time, the side measurement mechanism 500 can detect the size of the glass. During the detection, the side measurement mechanism 500 can also vertically align the glass in a coordinated manner. At the same time, while guiding the glass into the side measurement mechanism 500 through the guiding linkage mechanism 600, the back surface of the glass is monochromatically blocked, reducing part of the visual interference and further improving the detection result.

[0030] Referring to Figure 3 and Figure 4 In this embodiment, the vision detection mechanism 200 includes a slide rail 210 provided at the bottom of the support frame 160 and a telescopic power member 220. An installation plate 230 is slidably provided on the slide rail 210. An array of image acquisition cameras 240 is provided on the installation plate 230. It also includes an image processor 250 connected to the image acquisition cameras 240 and a display 260 communicatively connected to the image processor 250. The telescopic power member 220 is connected to the installation plate 230. By driving the telescopic power member 220, the installation plate 230 can be driven to reciprocate left and right, thereby driving the array of image acquisition cameras 240 to reciprocate, and a scanning vision detection of the glass surface can be performed. After the image information is processed by the image processor 250, it can be displayed on the display 260 whether there are defects on the glass. If there are defects on the glass surface, blanking is directly carried out by a robot. The telescopic power member 220 in this embodiment can adopt a power member such as an electric cylinder that can provide telescopic movement.

[0031] Referring to Figure 3 and Figure 4, in this embodiment, the mounting bracket 300 includes two vertical beams 310 fixed to the top of the support frame 160. A cross plate 320 is connected to the tops of the two vertical beams 310. The shielding mechanism 400 includes connecting plates 410 fixed to each vertical beam 310. A reel 420 with a winding function is rotatably connected between the two connecting plates 410. A shielding single-color cloth 430 is provided on the reel 420. Through the pulling of the guiding linkage mechanism 600, the shielding single-color cloth 430 can be unfolded during the downward movement of the side measuring mechanism 500 to shield the roller 180, etc., so that the back of the glass presents a single color without occlusion, improving the accuracy of visual inspection of the glass. After the inspection is completed, during the return of the side detection mechanism, since the reel 420 has an automatic winding function, for example, a torsion spring can be provided inside the reel 420 to automatically wind the shielding single-color cloth 430 and wait for the inspection of the next piece of glass.

[0032] Refer to Figure 4 and Figure 5 , in this embodiment, the side measuring mechanism 500 includes a reciprocating driving member 510 provided on the cross plate 320. The telescopic rod of the reciprocating driving member 510 is connected to an adjusting assembly, and a measuring assembly is connected to the adjusting assembly. The guiding linkage mechanism 600 is arranged on the measuring assembly. A sliding assembly is also provided between the two rows of rollers 180 on the support plate 170. The relative distance of the measuring assembly can be adjusted through the adjusting assembly to adapt to the inspection of glasses with different widths. The measuring assembly is used to detect whether the left and right sides of the glass are flush and whether the dimensions meet the standards, etc. The sliding assembly facilitates the downward sliding of the guiding linkage mechanism 600 and prevents jamming. The reciprocating driving member 510 can adopt a power member such as an electric cylinder that can provide telescopic movement.

[0033] Refer to Figure 3 and Figure 4 , in this embodiment, the adjusting assembly includes an adjusting plate 520 connected to the telescopic rod. An adjusting groove 521 is provided on the adjusting plate 520. Two adjusting blocks 523 are connected to the adjusting plate 520 through adjusting bolts 522. Each adjusting bolt 522 corresponds to an adjusting block 523. The measuring assembly is installed on the adjusting blocks 523, and a set of measuring assemblies is installed on each adjusting block 523. Through the cooperation of the adjusting bolts 522 and the adjusting groove 521, the relative distance between the two measuring assemblies can be adjusted. For example, loosen the adjusting bolts 522, and the two measuring assemblies can be relatively changed specifically. After the adjustment is completed, tighten the adjusting bolts 522 again to adapt to glasses with different widths.

[0034] Refer to Figure 5, specifically, the measuring component includes a measuring groove plate 530 connected to each adjusting block 523. The notches of the two measuring groove plates 530 face each other. A plurality of infrared sensors 531 arranged in columns are embedded inside the measuring groove plate 530. The sensitivity model of the infrared sensors 531 is selected according to needs. When the glass side can be detected, it can be determined that the size of the glass side is qualified. When the glass side cannot be detected, it can be determined that the width dimension of the glass is insufficient. The sliding component includes a guide plate 540 with an inclined surface portion 541 provided on the support plate 170. The inclination direction of the inclined surface portion 541 is the same as the inclination direction of the support plate 170. The height of the inclined surface portion 541 relative to the support plate 170 is not higher than the height of the roller 180 relative to the support plate 170. When transporting the glass, the glass is still supported by the roller 180 for rolling to prevent scratches on the glass caused by the excessive height of the inclined surface portion 541.

[0035] Refer to Figure 3 And Figure 4 , the guiding linkage mechanism 600 in this embodiment includes a guiding component for guiding the glass into the two measuring groove plates 530 and a linkage component for pulling and covering the single-color cloth 430 provided on the upper part of the guiding component. The guiding component includes an elastic guiding arc plate 610 provided at the lower part of the measuring groove plate 530. A guiding inlet 620 is provided at the lower end of the measuring groove plate 530. The linkage component includes a pull rod 630 provided at the lower part of the measuring groove plate 530. The pull rod 630 is connected to the single-color cloth 430. The lower part of the pull rod 630 is connected to the elastic guiding arc plate 610.

[0036] When the reciprocating power member pushes the adjusting plate 520 downward, the measuring groove plate 530 follows and moves downward. The elastic guiding arc plate 610 contacts the upper side of the glass. When the measuring groove plate 530 continues to move downward, the elastic guiding arc plate 610 can gradually guide the glass into the guiding inlet 620, so as to enter between the two measuring groove plates 530. During the process of the measuring groove plate 530 gradually moving downward, the glass gradually becomes vertical. During the process of the measuring groove plate 530 moving downward, the single-color cloth 430 can be synchronously pulled and unfolded through the pull rod 630 to cover the roller 180, etc., so that the back of the glass presents a single background, which is convenient for accurate visual inspection. The inclined surface portion 541 on the guide plate 540 facilitates the elastic guiding arc plate 610 to slide over each roller 180 to prevent jamming.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An online visual inspection system for insulating glass surface defects, installed at the front end of an insulating glass production line (100), the insulating glass production line (100) comprising a support frame (160), the support frame (160) being provided with an inclined support plate (170), the support plate (170) being provided with a plurality of rollers (180), the bottom of the support frame (160) being provided with a plurality of grooved wheels (190) for conveying glass, characterized in that: The support frame (160) is provided with a visual detection mechanism (200), the support plate (170) is provided with a mounting frame (300), the mounting frame (300) is provided with a shielding mechanism (400) and a side measurement mechanism (500), and the side measurement mechanism (500) is driven and connected to the shielding mechanism (400) via a guide linkage mechanism (600).

2. The online visual inspection system for insulating glass surface defects according to claim 1 is characterized in that: The visual inspection mechanism (200) comprises a slide rail (210) and a telescopic power member (220) arranged at the bottom of a support frame (160); a mounting plate (230) is slidably provided on the slide rail (210); an array-type image acquisition camera (240) is provided on the mounting plate (230); and an image processor (250) connected to the image acquisition camera (240); the telescopic power member (220) is connected to the mounting plate (230).

3. The online visual inspection system for insulating glass surface defects according to claim 2 is characterized in that: The supporting frame (160) comprises two vertical beams (310) fixed on the top of the supporting frame (160), the tops of the two vertical beams (310) are connected to a horizontal plate (320), the shielding mechanism (400) comprises a connecting plate (410) fixed to each vertical beam (310), a reel (420) having a reeling function is rotatably connected between the two connecting plates (410), and a shielding monochrome cloth (430) is provided on the reel (420).

4. The online visual inspection system for insulating glass surface defects according to claim 3 is characterized in that: The side measurement mechanism (500) comprises a reciprocating drive member (510) arranged on the transverse plate (320), the telescopic rod of the reciprocating drive member (510) is connected to an adjustment component, the adjustment component is connected to a measurement component, the guide linkage mechanism (600) is arranged on the measurement component, and a sliding component is further provided between two rows of rollers (180) on the support plate (170).

5. The online visual inspection system for insulating glass surface defects according to claim 4 is characterized in that: The adjustment assembly comprises an adjustment plate (520) connected to the telescopic rod, the adjustment plate (520) is provided with an adjustment slot (521), the adjustment plate (520) is connected to two adjustment blocks (523) via adjustment bolts (522), and the measuring assembly is mounted on the adjustment blocks (523).

6. The online visual inspection system for insulating glass surface defects according to claim 5 is characterized in that: The measuring assembly comprises a measuring slot plate (530) connected to each adjusting block (523), the slots of the two measuring slot plates (530) being opposite to each other, and a plurality of infrared sensors (531) arranged in a row are embedded inside the measuring slot plates (530).

7. The online visual inspection system for insulating glass surface defects according to claim 4 is characterized in that: The sliding assembly comprises a guide plate (540) having an inclined portion (541) arranged on the support plate (170), wherein the inclined direction of the inclined portion (541) is the same as the inclined direction of the support plate (170), and the height of the inclined portion (541) relative to the support plate (170) is not higher than the height of the roller (180) relative to the support plate (170).

8. The online visual inspection system for insulating glass surface defects according to claim 6 is characterized in that: The guide linkage mechanism (600) comprises a guide component for guiding the glass into two measuring slot plates (530) and a linkage component arranged on the upper part of the guide component for pulling the shielding monochrome cloth (430).

9. The online visual inspection system for insulating glass surface defects according to claim 8, characterized in that: The guide assembly comprises an elastic guide arc plate (610) arranged at the lower part of the measuring slot plate (530), and a guide entrance (620) is provided at the lower end of the measuring slot plate (530).

10. The online visual inspection system for insulating glass surface defects according to claim 9, characterized in that: The linkage assembly comprises a pull rod (630) arranged at the bottom of the measuring slot plate (530), the pull rod (630) being connected to the shielding single-color cloth (430), and the bottom of the pull rod (630) being connected to the elastic guide arc plate (610).

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