An online light detection device for coated glass production

Abstract

The application discloses an online light detection device for coated glass production and relates to the technical field of glass detection. The device comprises a first conveying roller group and a second conveying roller group for conveying the coated glass horizontally, and a gap exists between the first conveying roller group and the second conveying roller group. A lifting adjusting assembly is arranged at the gap and close to the first conveying roller group, and is used for adsorbing the coated glass from the first conveying roller group and can move up and down. A deviation correction and centering assembly is arranged at the gap and close to the second conveying roller group, and is used for driving the coated glass adsorbed by the lifting adjusting assembly to rotate and move longitudinally, and the deviation correction and centering of the coated glass are realized in the process. A light detection assembly is arranged above the adsorption area of the lifting adjusting assembly. The application can improve the detection accuracy of the subsequent process by adjusting the position of the coated glass in advance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass detection, in particular to an online light detection device for coated glass production. BACKGROUND

[0002] In the production process of coated glass, due to various factors such as process and environment, defects such as pinholes, scratches, spots and uneven coating will inevitably occur on the surface of the coated glass. These defects not only affect the appearance of the product, but also seriously reduce the optical performance and service life of the product. Therefore, it is crucial to set up an efficient and accurate online light detection device on the production line to conduct real-time quality control of the coated glass.

[0003] Currently, the online light detection device commonly used in the industry is usually integrated with the conveying roller group on the production line. The glass passes through the detection station under the drive of the conveying roller group, and the detection system (such as an industrial camera) located above scans the moving glass in real time to capture surface defects. In order to ensure that the detection area covers the effective part of the glass and ensure the positioning accuracy, a deviation correction and centering mechanism is usually set before the detection station to correct the angle deviation and position offset that may occur during the conveying process of the glass.

[0004] However, the above-mentioned prior art has many shortcomings in practical application. First, hard contact can easily damage the fragile coating layer, causing secondary defects. Second, dynamic detection is disturbed by vibration, image is blurred, and precision is limited. Third, deviation correction and centering control are complex and have low reliability. Fourth, a single white light source is used, which makes it difficult to identify different types of defects comprehensively, resulting in a high rate of missed detection.

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

[0006] To solve the above problems, the present application provides the following technical solution: an online light detection device for coated glass production, comprising: a first conveying roller group and a second conveying roller group for conveying the coated glass horizontally, wherein the first conveying roller group and the second conveying roller group are separated by a gap; a lifting adjustment assembly arranged at the gap and close to the first conveying roller group, for adsorbing the coated glass from the first conveying roller group and capable of lifting motion; a deviation correction and centering assembly arranged at the gap and close to the second conveying roller group, for driving the coated glass adsorbed by the lifting adjustment assembly to rotate and move longitudinally, and realizing deviation correction and centering of the coated glass during the process; and a light detection assembly arranged above the adsorption area of the lifting adjustment assembly.

[0007] As preferred, the lifting adjusting assembly comprises a track base arranged perpendicularly to the conveying direction of the first conveying roller group; a sliding base slidingly arranged on the track base; a base arranged on the sliding base; a telescopic cylinder vertically fixed on the base; a rotating disc assembly rotatably arranged on the output end of the telescopic cylinder; and a suction disc arranged on the rotating disc assembly for adsorbing the coated glass.

[0008] As preferred, the rotating disc assembly comprises a disc body fixed on the output end of the telescopic cylinder; a rotating shaft rotatably arranged in the disc body, the rotating shaft being further connected with the suction disc; and a locker arranged in the disc body for locking or releasing the rotating shaft; the locker being configured to be in a released state when the deviation correcting and centering assembly drives the coated glass to rotate, and then in a locked state to fix the rotating shaft.

[0009] As preferred, the base is fixed with sliding rods on both sides, the sliding rods slidingly penetrating through the sliding base, and springs being further sleeved on the sliding rods.

[0010] As preferred, the deviation correcting and centering assembly comprises a double track base arranged perpendicularly to the conveying direction of the first conveying roller group; two symmetrically arranged sliding plates, each slidingly arranged on the double track base; a rotating rod rotatably arranged on the double track base; a speed reducer arranged on the double track base for driving the rotating rod to rotate; and a plurality of hinged rods, each of the sliding plates being hinged with a group of the hinged rods between the corresponding end portions of the rotating rod; and a plurality of second combs fixed on each of the sliding plates and spaced apart.

[0011] As preferred, each of the sliding plates is fixed with a side plate, a telescopic rod is mounted on the side plate, a plurality of first combs are fixed on the output end of the telescopic rod, and the plurality of first combs are staggered with the second combs; and a pressure sensor is embedded in each of the first combs.

[0012] As preferred, the telescopic rod is configured to only one telescopic rod work and drive the first combs thereon to push the coated glass to rotate at the same time, and when the plurality of pressure sensors corresponding to the telescopic rod all detect pressure, the telescopic rod resets and makes the first combs retreat to the rear of the second combs.

[0013] As preferred, the light detection assembly comprises a mounting frame; an optical detection head fixed on the mounting frame; a stepping motor fixed on the mounting frame; and a light filter disc arranged on the output end of the stepping motor, the light filter disc having a plurality of circumferentially distributed light filtering portions, each of the light filtering portions being capable of moving to a position coaxial with the optical detection head in turn when the stepping motor drives the light filter disc to rotate.

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

[0015] The present application avoids the hard contact, extrusion or scratch of the traditional mechanical clamp on the edge or surface of the coated glass by adsorption lifting and suspension adjustment, realizes the flexible and non-destructive treatment of the fragile product.

[0016] The present application decouples the complex two-dimensional adjustment into two independent one-dimensional sub-processes. First, the angle deviation is corrected by using a one-sided telescopic rod and a pressure sensor feedback, and then the position centering is completed by a double-sided synchronous driving comb mechanism. This time-division multiplexing design avoids the mutual interference between different movements and simplifies the complexity of the control logic.

[0017] The present application can obtain multiple sets of detection data of the same glass area under different spectra in a very short time by using a step motor driven filter disc. Different types of defects will show different optical characteristics under different wavelengths of light, thereby significantly improving the comprehensive detection rate and recognition accuracy of the defects. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an online light detection device for coated glass production.

[0019] Figure 2 It is a schematic diagram of the overall structure of an online light detection device for coated glass production.

[0020] Figure 3 It is a schematic diagram of the overall structure of an online light detection device for coated glass production.

[0021] Figure 4 It is a schematic diagram of the overall structure of an online light detection device for coated glass production.

[0022] Figure 5 It is a schematic diagram of the overall structure of an online light detection device for coated glass production.

[0023] In the figure: 1, the first conveying roller group; 2, the second conveying roller group; 3, the lifting adjustment assembly; 4, the deviation correction and centering assembly; 5, the light detection assembly; 31, the track base; 32, the sliding base; 33, the sliding rod; 34, the spring; 35, the base; 36, the telescopic cylinder; 37, the rotating disc assembly; 371, the disc body; 372, the rotating shaft; 373, the lock; 38, the suction cup; 41, the double-track base; 42, the speed reducer motor; 43, the rotating rod; 44, the hinged rod; 45, the sliding plate; 46, the side plate; 47, the first comb tooth; 48, the telescopic rod; 49, the second comb tooth; 51, the mounting frame; 52, the optical detection head; 53, the stepping motor; 54, the light filter disc. DETAILED DESCRIPTION

[0024] In the embodiment of the present application, referring to Figures 1-5 , an online light detection device for coated glass production is provided, comprising: a first conveying roller group 1 and a second conveying roller group 2 for conveying coated glass horizontally, wherein the first conveying roller group 1 and the second conveying roller group 2 are separated by a gap; a lifting adjustment assembly 3 arranged at the gap and close to the first conveying roller group 1, for adsorbing the coated glass from the first conveying roller group 1 and performing lifting movement; a deviation correction and centering assembly 4 arranged at the gap and close to the second conveying roller group 2, for driving the coated glass adsorbed by the lifting adjustment assembly 3 to rotate and move longitudinally, and for correcting the deviation of the coated glass in the process; and a light detection assembly 5 arranged above the adsorption area of the lifting adjustment assembly 3.

[0025] In the implementation, the coated glass is conveyed horizontally under the drive of the first conveying roller group 1. When the coated glass enters the gap between the first conveying roller group 1 and the second conveying roller group 2, the lifting adjustment assembly 3 arranged at the gap and close to the first conveying roller group 1 starts to work. The lifting adjustment assembly 3 first establishes a connection with the lower surface of the coated glass through its adsorption function (for example, a vacuum suction cup or electromagnetic adsorption can be used), and then performs lifting movement to hold the whole coated glass. After the coated glass is adsorbed by the lifting adjustment assembly 3, the deviation correction and centering assembly 4 arranged on the other side of the gap starts to intervene, and drives the lifted coated glass to rotate and move longitudinally.

[0026] Specifically, the coated glass may be inclined at an angle (i.e., not completely parallel to the conveying direction) during the conveying process due to various reasons. The deviation correction and centering assembly 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 the angle correction is completed, the deviation correction and centering assembly 4 continues to drive the coated glass to move along the direction perpendicular to the conveying direction (i.e. the longitudinal direction) to move it to the preset center position. At this time, the coated glass is accurately positioned in the detection area, and the light detection assembly 5 above the lifting adjusting assembly 3 starts to work. Since the coated glass is in a static and accurate position at this time, the light detection assembly 5 can perform stable and undisturbed optical scanning on it, thereby accurately identifying the defects of the coated glass.

[0028] It is worth mentioning that the deviation correction method is relatively gentle. The gentleness is reflected in that the coated glass is lifted as a whole by the adsorption method, avoiding the hard contact and damage to the edge or surface of the coated glass caused by the mechanical clamp. The subsequent rotation and translation are also completed in the state that the coated glass is suspended, and there is no relative movement between the coated glass and the suction cup 38, avoiding the scratch.

[0029] In the embodiment, the lifting adjusting assembly 3 includes a track seat 31, which is arranged in a direction perpendicular to the conveying direction of the first conveying roller group 1; a sliding seat 32, which is slidingly arranged on the track seat 31; a base 35, which is arranged on the sliding seat 32; a telescopic cylinder 36, which is vertically fixed on the base 35; a turntable assembly 37, which is rotatably arranged on the output end of the telescopic cylinder 36; and a suction cup 38, which is arranged on the turntable assembly 37 and used for adsorbing the coated glass.

[0030] The turntable assembly 37 includes a disc body 371, which is fixed on the output end of the telescopic cylinder 36; a rotating shaft 372, which is rotatably arranged in the disc body 371 and connected with the suction cup 38; and a locker 373, which is arranged in the disc body 371 and used for locking or releasing the rotating shaft 372. The locker 373 is configured to be in a released state when the deviation correction and centering assembly 4 drives the coated glass to rotate, and then be in a locked state to fix the rotating shaft 372.

[0031] First, the telescopic cylinder 36 (for example, a hydraulic cylinder or an air cylinder) vertically fixed on the base 35 starts to work, and its output end extends upward to drive the turntable assembly 37 and the suction cup 38 to rise together until the suction cup 38 contacts and adsorbs the lower surface of the coated glass.

[0032] After the adsorption is completed, the output end of the telescopic cylinder 36 continues to extend upward to lift the whole coated glass into a freely adjustable suspended state.

[0033] When the deviation correcting and centering assembly 4 starts to push the glass to correct its angular deviation, the lockers 373 in the rotating disc assembly 37 are in the loosened state. At this time, the rotating shaft 372 can rotate freely in the disc body 371. Since the suction disc 38 is connected with the rotating shaft 372, the coated glass and the suction disc 38 as a whole can rotate around the central axis of the rotating shaft 372 under the lateral pushing force of the deviation correcting and centering assembly 4 with very small resistance.

[0034] When the angle of the glass is corrected to the preset state, the lockers 373 are immediately switched to the locked state to fix the rotating shaft 372 in the disc body 371. After that, since the entire lifting and adjusting assembly 3 slides on the track seat 31 through the slide seat 32 at the bottom thereof, the track seat 31 is arranged in the direction perpendicular to the conveying direction of the coated glass, the deviation correcting and centering assembly 4 drives it to move longitudinally to realize the centering process.

[0035] It is worth noting that the rotation of the glass is not actively driven by the rotating disc assembly 37 itself, but is passively responsive to the pushing force of the deviation correcting and centering assembly 4. The rotating disc assembly 37 itself is only responsible for providing the rotation fulcrum and locking function. This design decouples the rotation driving and rotation supporting functions, so that the deviation correcting and centering assembly 4 can focus on exerting the pushing force, and the lifting and adjusting assembly 3 focuses on supporting and positioning, simplifying the control systems of each other and improving the response speed and positioning accuracy of the overall system.

[0036] Further, the slide rods 33 are fixed on both sides of the base 35, the slide rods 33 slide through the slide seat 32, and the spring 34 is further sleeved on the slide rod 33.

[0037] In the embodiment, the deviation correcting and centering assembly 4 comprises: a double-track seat 41 arranged in the direction perpendicular to the conveying direction of the first conveying roller set 1; two symmetrically arranged slide plates 45, each of which is slidingly arranged on the double-track seat 41; a rotating rod 43 rotatingly arranged on the double-track seat 41; a speed reducer motor 42 arranged on the double-track seat 41 and used to drive the rotating rod 43 to rotate; a plurality of hinged rods 44, each of which is hinged between the corresponding end portions of each of the slide plates 45 and the rotating rod 43; and a plurality of second comb teeth 49 fixed on each of the slide plates 45 and spaced apart.

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

[0039] The telescopic rod 48 is configured to work only one at a time and drive the first comb tooth 47 on it to push the coated glass to rotate, when the corresponding multiple pressure sensors of the telescopic rod 48 all detect pressure, the telescopic rod 48 resets and makes the first comb tooth 47 retreat to the rear of the second comb tooth 49.

[0040] When the coated glass is lifted by the lifting adjustment assembly 3, first determine whether it has an angle skew.

[0041] Suppose the coated glass needs to be corrected clockwise, the telescopic rod 48 on the right will be started. The telescopic rod 48 pushes the first comb tooth 47 on it to stretch forward, beyond the second comb tooth 49, and contact the right edge of the glass.

[0042] Because the coated glass is in a suspended state, and the turntable assembly 37 of the lifting adjustment assembly 3 is in an unlocked state at this time, the thrust from the right first comb tooth 47 will form a moment of force, driving the coated glass to rotate clockwise around the rotating shaft 372.

[0043] In this process, multiple pressure sensors embedded in the first comb tooth 47 monitor the contact state in real time. Only when the right edge of the coated glass is completely in contact with the entire row of first comb teeth 47, that is, all sensors detect pressure, it is determined that the angle has been corrected.

[0044] Subsequently, the telescopic rod 48 immediately resets the first comb tooth 47 to retreat to the rear of the second comb tooth 49, removing the lateral thrust on the coated glass. At this point, the attitude (angle) of the coated glass is corrected, but its longitudinal position may still be offset.

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

[0046] The speed reduction motor 42 is started, driving the rotating rod 43 to rotate. Through the two hinged rods 44, the two sliding plates 45 make synchronous opposite motion on the double rail seat 41.

[0047] At this time, since the first comb tooth 47 has retreated, the second comb tooth 49 on the two sliding plates 45 approaches and contacts the coated glass with the correct attitude from both sides at the same time.

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

[0049] That is, in the embodiment, by time-sharing multiplexing two sets of comb mechanisms, the complex two-dimensional (angle + position) adjustment problem is decomposed into two independent one-dimensional sub-problems. The deviation correction module (first comb 47) and the centering module (second comb 49) work independently at different times and do not interfere with each other.

[0050] In the embodiment, the light detection assembly 5 includes a mounting frame 51, an optical detection head 52 fixed to the mounting frame 51, a stepper motor 53 fixed to the mounting frame 51, and a filter disc 54 provided at the output end of the stepper motor 53. The filter disc 54 has a plurality of circumferentially distributed filter portions. When the stepper motor 53 drives the filter disc 54 to rotate, each filter portion can be moved to a position coaxial with the optical detection head 52 in turn.

[0051] In implementation, the stepper motor 53 is used as a driving source and starts to work after receiving an instruction. It drives the filter disc 54 at the output end to rotate step by step. The filter disc 54 integrates a plurality of filter portions with different spectral characteristics (for example, filter pieces of 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 portion will be turned to a position coaxial with the optical detection head 52, that is, into the detection light path. At this time, the optical detection head 52 (for example, an industrial camera with high resolution) will perform an image or data acquisition on the glass through the current filter portion.

[0053] Then, the stepper motor 53 continues to rotate, so that each filter portion enters the light path in turn and cyclically, and the optical detection head 52 synchronously performs high-frequency time-sharing acquisition. In this way, a plurality of sets of detection data of the same glass region under different spectral conditions can be obtained in a very short time.

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

[0055] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art, according to the technical solution and inventive concept of the present application, can make equivalent replacements or changes within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

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); 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; 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). 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; 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).

2. The online light detection device for coated glass production according to claim 1, 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).

3. The online light detection device for coated glass production according to claim 1, 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).

4. 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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