Online light detection device for coated glass production

Abstract

The invention discloses an on-line light detection device for coated glass production, and relates to the technical field of glass detection, the on-line light detection device comprises a first conveying roller group and a second conveying roller group which are used for transversely conveying coated glass, and an interval exists between the first conveying roller group and the second conveying roller group; the lifting adjusting assembly is arranged at the interval, is close to the first conveying roller group, is used for adsorbing the coated glass from the first conveying roller group and can perform lifting motion; the deviation rectifying and centering assembly is arranged at the interval, is close to the second conveying roller set and is used for driving the coated glass adsorbed by the lifting and adjusting assembly to rotate and longitudinally move, and deviation rectifying and centering of the coated glass are achieved in the process; the light detection assembly is arranged above the adsorption area of the lifting adjustment assembly, and the follow-up detection precision can be improved conveniently by conducting flexible position adjustment on the coated glass in advance.

Description

Technical Field

[0001] This invention relates to the field of glass testing technology, and more specifically to an online light testing device for coated glass production. Background Technology

[0002] During the production of coated glass, various defects such as pinholes, scratches, spots, and uneven coating are inevitably produced on its surface due to factors such as process and environment. These defects not only affect the aesthetics of the product but also severely reduce its optical performance and lifespan. Therefore, it is crucial to install efficient and accurate online lighting detection devices on the production line for real-time quality control of coated glass.

[0003] Currently, the online light inspection devices commonly used in the industry are typically integrated with conveyor roller sets on the production line. Driven by the conveyor roller sets, the glass passes through the inspection station, where an inspection system (such as an industrial camera) scans the moving glass in real time to capture surface defects. To ensure that the inspection area covers the effective portion of the glass and guarantees positioning accuracy, a correction and alignment mechanism is usually installed before the inspection station to correct for any angular deviations and positional shifts that may occur during the glass's transport.

[0004] However, the aforementioned existing technologies have revealed many shortcomings in practical applications. First, hard contact can easily damage the fragile coating layer, causing secondary defects. Second, dynamic detection is affected by vibration, resulting in blurred images and limited accuracy. Third, the correction and alignment control are complex and have low reliability. Fourth, the use of a single white light source makes it difficult to comprehensively identify different types of defects, leading to a high rate of missed detections.

[0005] Therefore, it is necessary to provide an online light detection device for coated glass production to solve the above problems. Summary of the Invention

[0006] To address the aforementioned problems, the present invention provides the following technical solution: an online lighting detection device for coated glass production, comprising: a first conveying roller group and a second conveying roller group for laterally conveying coated glass, wherein there is a gap between the first conveying roller group and the second conveying roller group; a lifting and adjusting component disposed at the gap and close to the first conveying roller group, for adsorbing coated glass from the first conveying roller group and capable of lifting and lowering; a correction and centering component disposed at the gap and close to the second conveying roller group, for driving the coated glass adsorbed by the lifting and adjusting component to rotate and move longitudinally, and for correcting and centering the coated glass in the process; and a lighting detection component disposed above the adsorption area of ​​the lifting and adjusting component.

[0007] Preferably, the lifting adjustment assembly includes: a track seat, the arrangement direction of which is perpendicular to the conveying direction of the first conveying roller group; a slide seat, slidably disposed on the track seat; a base seat, disposed on the slide seat; a telescopic cylinder, vertically fixed on the base; a turntable assembly, rotatably disposed on the output end of the telescopic cylinder; and a suction cup, disposed on the turntable assembly, for adsorbing coated glass.

[0008] Preferably, the turntable assembly includes: a turntable body fixed to the output end of the telescopic cylinder; a rotating shaft rotatably disposed in the turntable body, the rotating shaft also being connected to the suction cup; and a locking device disposed in the turntable body for locking or releasing the rotating shaft; the locking device is configured to be in a released state when the alignment component drives the coated glass to rotate, and then in a locked state to fix the rotating shaft.

[0009] Preferably, slide rods are fixed on both sides of the base, the slide rods slide through the slide block, and springs are also sleeved on the slide rods.

[0010] Preferably, the alignment and centering assembly includes: a double-track base, the arrangement direction of which is perpendicular to the conveying direction of the first conveyor roller group; two symmetrically arranged slide plates, each slide plate being slidably mounted on the double-track base; a rotating rod, rotatably mounted on the double-track base; a reduction motor, mounted on the double-track base, for driving the rotating rod to rotate; and a set of hinge rods, each set of hinge rods being hinged between the corresponding ends of the slide plate and the rotating rod; and multiple spaced second comb teeth fixed on each slide plate.

[0011] Preferably, each of the slide plates is fixed with a side plate, and a telescopic rod is installed on the side plate. The output end of the telescopic rod is fixed with a plurality of first comb teeth, which are distributed alternately with the second comb teeth; a pressure sensor is embedded in the first comb teeth.

[0012] Preferably, the telescopic rod is configured such that only one telescopic rod works at a time and drives the first comb tooth on it to push the coated glass to rotate. When multiple pressure sensors corresponding to the telescopic rod detect pressure, the telescopic rod resets and causes the first comb tooth to retract to behind the second comb tooth.

[0013] Preferably, the light detection assembly includes: a mounting bracket; an optical detection head fixed on the mounting bracket; a stepper motor fixed on the mounting bracket; and a filter disc disposed at the output end of the stepper motor. The filter disc has multiple circumferentially distributed filter sections, and when the stepper motor drives the filter disc to rotate, each filter section can move sequentially to a position coaxial with the optical detection head.

[0014] Compared with the prior art, the present invention provides an online light detection device for coated glass production, which has the following beneficial effects:

[0015] This invention, through adsorption-based lifting and suspension adjustment, avoids the hard contact, squeezing, or scratching of the edges or surfaces of coated glass by traditional mechanical clamps, achieving flexible and non-destructive processing of fragile products. More importantly, by lifting the coated glass to a stationary state before light detection, vibration interference during the transmission process is eliminated, ensuring high fidelity of the images acquired by the optical detection head and effectively reducing misjudgments and missed judgments caused by detection interference.

[0016] This invention decouples complex two-dimensional adjustment into two independent one-dimensional sub-processes. First, angle correction is achieved using feedback from a single-sided telescopic rod and a pressure sensor. Then, efficient position alignment is completed through a dual-sided synchronously driven comb mechanism. This time-division multiplexing design avoids interference between different movements and simplifies the complexity of the control logic.

[0017] This invention utilizes a stepper motor-driven filter disc, enabling the optical detection head to acquire multiple sets of detection data for the same glass region under different spectra within a very short time. Different types of defects exhibit differentiated optical characteristics under different wavelengths of light, thereby significantly improving the overall defect detection rate and identification accuracy. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of an online lighting detection device for coated glass production;

[0019] Figure 2 A three-dimensional structural diagram of the lifting and adjusting component;

[0020] Figure 3 This is a cross-sectional view of the turntable assembly.

[0021] Figure 4 A three-dimensional structural diagram of the alignment and centering component for correction.

[0022] Figure 5 This is a three-dimensional structural diagram of the light detection component;

[0023] In the diagram: 1. First conveyor roller group; 2. Second conveyor roller group; 3. Lifting and adjusting assembly; 4. Correction and centering assembly; 5. Light detection assembly; 31. Track seat; 32. Slide seat; 33. Slide rod; 34. Spring; 35. Base; 36. Telescopic cylinder; 37. Turntable assembly; 371. Turntable body; 372. Rotating shaft; 373. Locking device; 38. Suction cup; 41. Double track seat; 42. Gear motor; 43. Rotating rod; 44. Hinge rod; 45. Slide plate; 46. Side plate; 47. First comb tooth; 48. Telescopic rod; 49. Second comb tooth; 51. Mounting bracket; 52. Optical detection head; 53. Stepper motor; 54. Filter disc. Detailed Implementation

[0024] In the embodiments of the present invention, please refer to Figures 1-5 An online lighting inspection device for coated glass production is provided, comprising: a first conveyor roller group 1 and a second conveyor roller group 2 for laterally conveying coated glass, wherein there is a gap between the first conveyor roller group 1 and the second conveyor roller group 2; a lifting adjustment component 3, disposed at the gap and close to the first conveyor roller group 1, for adsorbing coated glass from the first conveyor roller group 1 and capable of lifting and lowering; a correction and centering component 4, disposed at the gap and close to the second conveyor roller group 2, for driving the coated glass adsorbed by the lifting adjustment component 3 to rotate and move longitudinally, and for correcting and centering the coated glass in the process; and a lighting inspection component 5, disposed above the adsorption area of ​​the lifting adjustment component 3.

[0025] In practice, the coated glass is conveyed laterally under the drive of the first conveyor roller group 1. When the coated glass enters the interval area between the first conveyor roller group 1 and the second conveyor roller group 2, the lifting and adjusting component 3, located at the interval and close to the first conveyor roller group 1, begins to operate. The lifting and adjusting component 3 first establishes a connection with the lower surface of the coated glass through its adsorption function (e.g., using a vacuum suction cup or electromagnetic adsorption), and then performs a lifting motion to lift the entire piece of coated glass. After the coated glass is adsorbed by the lifting and adjusting component 3, the alignment and centering component 4, located on the other side of the interval, begins to intervene. The alignment and centering component 4 acts on the lifted coated glass, driving it to complete rotation and longitudinal movement.

[0026] Specifically, the coated glass may become angularly skewed (i.e., not completely parallel to the conveying direction) during the conveying process due to various reasons. The alignment component 4 drives the coated glass to rotate in the horizontal plane until its posture is corrected to be parallel to the conveying direction of the first conveying roller group 1.

[0027] After angle correction, the alignment and centering component 4 continues to drive the coated glass to move along a direction perpendicular to the conveying direction (i.e., longitudinally), moving it to the preset center position. At this point, the coated glass has completed both the alignment and centering processes and is precisely positioned within the detection area. The lighting detection component 5, located above the lifting and adjusting component 3, then begins its operation. Because the coated glass is now stationary and precisely positioned, the lighting detection component 5 can perform a stable and interference-free optical scan, thereby accurately identifying any defects in the coated glass.

[0028] It is worth mentioning that this correction method is relatively gentle. This gentleness is reflected in the fact that the coated glass is lifted as a whole through adsorption, avoiding the hard contact and damage that mechanical clamps might cause to the edges or surface of the coated glass. Subsequent rotation and translation are also completed while the coated glass is suspended in the air; there is no relative movement between the coated glass and the suction cup 38, preventing scratches.

[0029] In this embodiment, the lifting adjustment assembly 3 includes: a track seat 31, whose arrangement direction is perpendicular to the conveying direction of the first conveying roller group 1; a slide seat 32, which is slidably disposed on the track seat 31; a base 35, which is disposed on the slide seat 32; a telescopic cylinder 36, which is vertically fixed on the base 35; a turntable assembly 37, which is rotatably disposed on the output end of the telescopic cylinder 36; and a suction cup 38, which is disposed on the turntable assembly 37 and is used to adsorb coated glass.

[0030] The turntable assembly 37 includes: a disc body 371, fixed to the output end of the telescopic cylinder 36; a rotating shaft 372, rotatably disposed in the disc body 371, the rotating shaft 372 also being connected to the suction cup 38; and a locking device 373, disposed in the disc body 371, for locking or releasing the rotating shaft 372; the locking device 373 is configured to be in a released state when the alignment component 4 drives the coated glass to rotate, and then in a locked state to fix the rotating shaft 372.

[0031] First, the telescopic cylinder 36 (e.g., a hydraulic cylinder or a pneumatic cylinder) fixed vertically on the base 35 begins to work, with its output end extending upwards, driving the turntable assembly 37 and the suction cup 38 to rise together until the suction cup 38 contacts and adheres to the lower surface of the coated glass.

[0032] After adsorption is complete, the output end of the telescopic cylinder 36 continues to extend upward, thereby lifting the entire coated glass and putting it into a freely adjustable suspended state.

[0033] When the alignment component 4 begins to push the glass to correct its angular deviation, the locking device 373 in the turntable assembly 37 is in the released state. At this time, the rotating shaft 372 can rotate freely in the disc body 371. Since the suction cup 38 is connected to the rotating shaft 372, the coated glass and the suction cup 38, as a whole, can rotate around the central axis of the rotating shaft 372 with minimal resistance under the lateral thrust of the alignment component 4.

[0034] Once the glass angle is corrected to the preset state, the locking device 373 immediately switches to the locking state, fixing the rotating shaft 372 in the disc 371. After this, since the entire lifting and adjusting assembly 3 slides on the track seat 31 via its bottom slide block 32, and the track seat 31 is perpendicular to the direction of the coated glass conveying, the alignment and centering assembly 4 drives it to move longitudinally, achieving centering.

[0035] It is worth noting that the rotation of the glass is not actively driven by the turntable assembly 37 itself, but passively responds to the thrust of the alignment and centering assembly 4. The turntable assembly 37 itself is only responsible for providing the fulcrum for rotation and the locking function. This design decouples the two functions of rotation drive and rotation support, allowing the alignment and centering assembly 4 to focus on applying thrust, while the lifting and adjusting assembly 3 focuses on support and positioning. This simplifies the control systems of each component and improves the overall system's response speed and positioning accuracy.

[0036] Furthermore, slide rods 33 are fixed on both sides of the base 35, and the slide rods 33 slide through the slide block 32. A spring 34 is also sleeved on the slide rods 33.

[0037] In this embodiment, the alignment and centering assembly 4 includes: a double track base 41, whose arrangement direction is perpendicular to the conveying direction of the first conveying roller group 1; two symmetrically arranged slide plates 45, each slide plate 45 being slidably disposed on the double track base 41; a rotating rod 43, rotatably disposed on the double track base 41; a reduction motor 42, disposed on the double track base 41, for driving the rotating rod 43 to rotate; and a set of hinge rods 44, which are respectively hinged between the corresponding ends of each slide plate 45 and the rotating rod 43; and a plurality of spaced second comb teeth 49 are fixed on each slide plate 45.

[0038] Each of the slide plates 45 is fixed with a side plate 46, and a telescopic rod 48 is installed on the side plate 46. The output end of the telescopic rod 48 is fixed with a plurality of first comb teeth 47, and the plurality of first comb teeth 47 and second comb teeth 49 are distributed alternately. A pressure sensor is embedded in the first comb teeth 47.

[0039] The telescopic rod 48 is configured such that only one telescopic rod 48 works at a time and drives the first comb tooth 47 on it to push the coated glass to rotate. When multiple pressure sensors corresponding to the telescopic rod 48 detect pressure, the telescopic rod 48 resets and causes the first comb tooth 47 to retract to behind the second comb tooth 49.

[0040] After the coated glass is attracted by the lifting and adjusting component 3, it is first determined whether there is any angular deviation.

[0041] If the coated glass needs to be aligned clockwise, the telescopic lever 48 on the right side will be activated. This telescopic lever 48 pushes the first comb tooth 47 forward, past the second comb tooth 49, and into contact with the right edge of the glass.

[0042] Since the coated glass is suspended in the air and the turntable assembly 37 of the lifting adjustment assembly 3 is in the unlocked state, the thrust from the first comb tooth 47 on the right side will form a torque, driving the coated glass to rotate clockwise around the rotating shaft 372.

[0043] During this process, multiple pressure sensors embedded in the first comb teeth 47 monitor the contact status in real time. The angle is determined to be calibrated only when the right edge of the coated glass is completely in contact with the entire row of first comb teeth 47, that is, when all sensors detect pressure.

[0044] Subsequently, the telescopic rod 48 immediately resets, retracting the first comb tooth 47 behind the second comb tooth 49, thus releasing the lateral thrust on the coated glass. At this point, the orientation (angle) of the coated glass is corrected, but its longitudinal position may still be off-center.

[0045] At this time, the position centering operation begins, and the turntable component 37 of the lifting adjustment component 3 is in a locked state.

[0046] The geared motor 42 starts, driving the rotating rod 43 to rotate. Through the hinge rods 44 at both ends, the two slides 45 move synchronously towards each other on the double rail seat 41.

[0047] At this moment, since the first comb tooth 47 has retracted, the second comb tooth 49 on the two side slides 45 simultaneously approaches and contacts the coated glass that has been aligned.

[0048] Because the angle of the coated glass is correct, the second comb teeth 49 on both sides can clamp the two edges of the coated glass in a completely symmetrical manner and push it to the preset center line to complete the longitudinal centering.

[0049] In other words, in this embodiment, by time-division multiplexing two sets of comb tooth mechanisms, the complex two-dimensional (angle + position) adjustment problem is decomposed into two independent one-dimensional sub-problems. The correction module (first comb tooth 47) and the centering module (second comb tooth 49) work independently at different times without interfering with each other.

[0050] In this embodiment, the light detection component 5 includes: a mounting frame 51; an optical detection head 52 fixed on the mounting frame 51; a stepper motor 53 fixed on the mounting frame 51; and a filter disc 54 disposed at the output end of the stepper motor 53. The filter disc 54 has multiple circumferentially distributed filter parts. When the stepper motor 53 drives the filter disc 54 to rotate, each filter part can move sequentially to a position coaxial with the optical detection head 52.

[0051] In practice, the stepper motor 53 acts as a drive source and starts working after receiving a command. It drives the filter disc 54 at its output end to rotate in a stepping manner. The filter disc 54 integrates multiple filter sections with different spectral characteristics (e.g., it may include filters for red light, green light, blue light, ultraviolet light, polarized light, etc.).

[0052] When the stepper motor 53 drives the filter disc 54 to rotate by a set angle, a new filter section is rotated to a position coaxial with the optical inspection head 52, thus entering the inspection optical path. At this time, the optical inspection head 52 (e.g., a high-resolution industrial camera) will perform an image or data acquisition on the glass through the current filter section.

[0053] Then, the stepper motor 53 continues to rotate, causing each filter to enter the optical path sequentially and cyclically, while the optical detection head 52 simultaneously performs high-frequency time-division acquisition. In this way, multiple sets of detection data for the same glass area under various different spectral conditions can be acquired in a very short time.

[0054] Different types of defects exhibit different optical characteristics under different wavelengths of light. For example, some minute scratches that are difficult to detect with the naked eye or under white light become clearly visible under polarized light at a specific angle.

[0055] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An online light detection device for coated glass production, characterized in that, include: A first conveyor roller group (1) and a second conveyor roller group (2) for transverse conveying of coated glass, with an interval between the first conveyor roller group (1) and the second conveyor roller group (2); The lifting adjustment component (3) is located at the interval and close to the first conveyor roller group (1) for adsorbing the coated glass from the first conveyor roller group (1) and can be lifted and lowered. The alignment component (4) is located at the interval and close to the second conveyor roller group (2) to drive the coated glass adsorbed by the lifting adjustment component (3) to rotate and move longitudinally, and to achieve alignment of the coated glass in the process. The light detection component (5) is positioned above the adsorption area of ​​the lifting adjustment component (3).

2. The online light detection device for coated glass production according to claim 1, characterized in that, The lifting adjustment component (3) includes: The track seat (31) is arranged in a direction perpendicular to the conveying direction of the first conveying roller group (1); The slide (32) is slidably disposed on the track seat (31); The base (35) is disposed on the slide (32); The telescopic cylinder (36) is vertically fixed to the base (35); A turntable assembly (37) is rotatably mounted at the output end of the telescopic cylinder (36); A suction cup (38) is disposed on the turntable assembly (37) for adsorbing coated glass.

3. The online light detection device for coated glass production according to claim 2, characterized in that, The turntable assembly (37) includes: The disc body (371) is fixed to the output end of the telescopic cylinder (36); A rotating shaft (372) is rotatably disposed in the disc body (371), and the rotating shaft (372) is also connected to the suction cup (38); A locking device (373) is disposed in the disc body (371) for locking or releasing the rotating shaft (372). The locking device (373) is configured to be in a released state when the alignment assembly (4) drives the coated glass to rotate, and then in a locked state to fix the rotating shaft (372).

4. The online light detection device for coated glass production according to claim 2, characterized in that, Both sides of the base (35) are fixed with slide rods (33), which slide through the slide block (32) and are also fitted with springs (34).

5. An online light detection device for coated glass production according to claim 1 or 3, characterized in that, The alignment correction component (4) includes: The double track seat (41) is arranged in a direction perpendicular to the conveying direction of the first conveying roller group (1); Two symmetrically arranged sliding plates (45) are slidably mounted on the double rail seat (41); The rotating rod (43) is rotatably mounted on the double rail seat (41); A geared motor (42) is mounted on the double rail base (41) and is used to drive the rotating rod (43) to rotate; A set of hinge rods (44) is respectively hinged between the corresponding ends of each of the slide plates (45) and the rotating rod (43). Each of the aforementioned slide plates (45) has a plurality of spaced second comb teeth (49) fixed on it.

6. The online light detection device for coated glass production according to claim 5, characterized in that, Each of the slide plates (45) is fixed with a side plate (46), and a telescopic rod (48) is installed on the side plate (46). The output end of the telescopic rod (48) is fixed with a plurality of first comb teeth (47), and the plurality of first comb teeth (47) are staggered with the second comb teeth (49). A pressure sensor is embedded in the first comb teeth (47).

7. The online light detection device for coated glass production according to claim 6, characterized in that, The telescopic rod (48) is configured such that only one telescopic rod (48) works at the same time and drives the first comb tooth (47) on it to push the coated glass to rotate. When multiple pressure sensors corresponding to the telescopic rod (48) detect pressure, the telescopic rod (48) resets and causes the first comb tooth (47) to retract to the rear of the second comb tooth (49).

8. The online light detection device for coated glass production according to claim 1, characterized in that, The light detection component (5) includes: Mounting bracket (51); An optical detection head (52) is fixed on the mounting bracket (51); A stepper motor (53) is fixed on the mounting bracket (51); The filter disc (54) is located at the output end of the stepper motor (53). The filter disc (54) has multiple filter parts distributed in a circular pattern. When the stepper motor (53) drives the filter disc (54) to rotate, each filter part can move sequentially to a position coaxial with the optical detection head (52).

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