A flat glass defect detection device

Abstract

A flat glass defect detection device of the present invention comprises a glass conveying device, wherein the glass conveying device comprises a conveying frame, a powered conveying roller and a glass guiding device; a face detection device for detecting defects on the glass surface; and an edge detection device for detecting defects on the edge of the glass. Firstly, the flat glass in a random posture on the powered conveying roller is guided by the glass guiding device, and the guided glass is then subjected to edge defect detection and surface defect detection (the two sequences are not prioritized), thereby achieving complete detection of the flat glass and classifying the quality of the glass. Compared with traditional detection equipment, during the detection process, the position of the glass in the detection area is randomly distributed, which is inconvenient for detecting edge defects and is not conducive to analyzing and classifying the defects of the glass.

Description

Technical Field

[0001] The invention relates to the field of product defect detection, and in particular to a flat glass defect detection device. Background Art

[0002] In the production process of flat glass, it is inevitable that some defects such as bubbles, cracks, scratches, etc. will occur. In particular, some special flat glass needs to go through the edge grinding process, and defects such as broken edges and broken corners will occur, which will affect the appearance quality or use function. Therefore, online quality inspection is required before stacking and packaging. At present, the defects of flat glass are mainly monitored online by the naked eye, which is easy to cause eye fatigue, and the inspection quality is affected by the supervisory factors of the inspectors, making the glass quality difficult to control. Although a variety of related inspection equipment have appeared on the market, the existing inspection equipment has a complex structure, high manufacturing cost, and a very high error rate for the detection of internal defects, hole edge defects and side defects of the product. More importantly, the current inspection equipment has a single detection function and cannot perform all-round inspection of all defects of the product to be inspected. When faced with multiple defect detection requirements, it can only purchase a variety of inspection equipment, which requires a large area of ​​measurement space, has high requirements for the inspection site, and requires a lot of manpower. The inspection efficiency is very low.

[0003] Traditionally, the prior art discloses a photovoltaic glass edge defect detection system and a corresponding method (CN201910236895), wherein the system is installed on a production roller of photovoltaic glass, wherein the system includes a mechanical frame, a light source module, a camera module and an edge defect detection module, and the system is controlled in combination with a corresponding method for realizing photovoltaic glass edge defect detection, wherein machine vision detection technology is used to realize automatic detection of photovoltaic glass edges, but the system has the following problems:

[0004] 1. The system only detects and classifies defects on the edge of the glass, but cannot detect the defect quality on the surface of the glass;

[0005] 2. The position of the glass to be inspected on the roller is affected by many factors and is random within a certain area. It is difficult to limit or adjust the position of the glass by the positioning rollers on the left and right sides, which will increase the difficulty of subsequent defect detection and affect the final detection effect;

[0006] 3. The width of the glass is limited by the positioning rollers on the left and right sides, and can only adapt to the defect detection of single-width glass.

[0007] Therefore, there is an urgent need for an intelligent device that can accurately detect various defects of flat glass. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a flat glass defect detection device, which can not only accurately detect the face defects and edge defects of the flat glass, but also is applicable to the detection of flat glass of various widths.

[0009] In order to achieve the above object, the present invention provides a flat glass defect detection device, comprising:

[0010] A glass conveying device is used to convey the workpiece to be inspected, comprising a conveying frame, a power conveying roller and a glass guiding device, wherein the glass guiding device is arranged at the lower side of the conveying roller at the feeding end of the power conveying roller; the glass guiding device comprises a left pushing mechanism and a right pushing mechanism, wherein the left pushing mechanism and the right pushing mechanism are symmetrically arranged in the width direction of the power conveying roller, and the left pushing mechanism and the right pushing mechanism are respectively provided with guiding wheels, wherein the guiding wheels are inserted in the gaps between adjacent conveying rollers, and the symmetrically arranged guiding wheels can be extended outward or retracted inward at the same time, and when retracted inward, the guiding wheels touch the glass to align it;

[0011] A face detection device is mounted above the middle of the glass conveying device, comprising a face detection frame, an image acquisition module arranged on the top of the face detection frame, a first illumination module arranged at the front end of the face detection frame for providing a light source for the upper surface of the glass, a second illumination module arranged at the lower side of the conveying roller of the power conveying roller and for providing a light source for the lower surface of the glass, and a data processing module connected to the image acquisition module for calculating and processing the collected image, and is used for detecting facial defects of the flat glass after correction;

[0012] An edge detection device, comprising a first side edge detection device and a second side edge detection device, symmetrically arranged in the width direction of the power conveying roller, for detecting defects on both side edges of the straightened flat glass;

[0013] The control system is electrically connected to the glass conveying device, the image acquisition module, the data processing module and the edge detection device respectively.

[0014] Preferably, the glass guiding device also includes a bracket connected to the glass conveying device, and the left pushing mechanism and the right pushing mechanism respectively include a driving cylinder, and the power output end of the driving cylinder is connected to a push plate, and a guiding wheel is provided on the push plate; the driving cylinder is connected to the guiding screw nut through a cylinder connecting plate, and the guiding screw nut is sleeved on the guiding screw; the guiding screw is connected to the bracket through a screw support; the rodless chambers of the driving cylinders of the two pushing mechanisms are simultaneously inhaled or under the action of their spring force, can drive the guiding wheels on the push plates to extend outward at the same time; the rod chambers of the driving cylinders of the two pushing mechanisms are simultaneously inhaled, which can drive the guiding wheels on the push plates to retract inward at the same time.

[0015] Preferably, when the driving cylinder is a single-acting cylinder, the push plates are simultaneously extended outwards under the action of the spring force inside the rodless cavity of the driving cylinder.

[0016] Preferably, when the driving cylinder is a double-acting cylinder, a normally open air-controlled valve and a normally open electric-controlled valve are connected in parallel on the air intake pipe of the rodless chamber of the driving cylinder, and an air storage tank is provided which is respectively connected to the normally open air-controlled valve and the normally open electric-controlled valve.

[0017] Preferably, the driving cylinder is a non-guided cylinder, and the push plate is connected to the outer surface of the top plate of the bracket through a linear guide pair. The linear guide pairs are in two groups and are symmetrically arranged on both sides of the driving cylinder.

[0018] Preferably, each set of linear guide pairs includes two linear bearings and a linear guide, wherein one linear bearing is connected to the push plate, and the other is connected to the cylinder connecting plate; the linear guide is connected to the outer surface of the top plate of the bracket through a linear guide support.

[0019] Preferably, at least two guide wheels are provided on the push plate.

[0020] Preferably, the guide wheel is connected to the push plate via a vertical bracket.

[0021] Preferably, the guide wheel is a roller assembly that can rotate around its axis, and the outer side of the roller assembly is made of non-metallic material.

[0022] Preferably, a guiding handwheel is provided on the power output end of the guiding screw facing the driving cylinder, which is used to manually rotate the guiding screw to adjust the installation position of the driving cylinder in the width direction of the glass conveying device, thereby adjusting the spacing between the two symmetrically arranged pushing mechanisms to adapt to glass of different widths.

[0023] Preferably, a fixing frame is also provided on the guiding hand wheel for fastening the connection between the guiding hand wheel and the guiding screw to prevent the guiding hand wheel from rotating freely.

[0024] Preferably, a sensor bracket is also provided on the bracket for detecting whether glass to be corrected passes through.

[0025] Preferably, the facial detection frame spans across the width direction of the glass conveying device, and includes symmetrically arranged left and right legs and a frame beam, the left leg, the frame beam and the right leg are connected in sequence to form a door-shaped facial detection frame, and the left leg and the right leg are respectively fixed to the ground.

[0026] Preferably, the frame crossbeam comprises an upper crossbeam and a lower crossbeam, and the upper crossbeam and lower crossbeam brackets are connected by a plurality of vertical beams.

[0027] Preferably, the image acquisition module includes a plurality of facial camera modules, which are arranged at intervals on the upper crossbeam and are used to photograph the surface of the flat glass placed on the conveying roller and generate corresponding pictures for analysis and processing by the data processing module.

[0028] Preferably, the first illumination module is arranged above the conveying roller, facing toward or away from the end of the glass guiding device, so as to provide illumination to the upper surface of the flat glass.

[0029] Preferably, the second lighting module is arranged on the left leg and the right leg, which is lower than the conveying roller in the height direction of the conveying frame and penetrates into the gap between adjacent conveying rollers to provide lighting for the lower surface of the flat glass placed on the conveying roller.

[0030] Preferably, the first side detection device and the second side detection device respectively include a C-type shooting lighting integrated module, a side beam connected to the face detection frame, and a position adjustment mechanism connected to the lower part of the side beam, and the position adjustment mechanism is connected to the top of the C-type shooting lighting integrated module through a linear guide pair.

[0031] Preferably, the C-shaped openings of two symmetrical C-shaped shooting and lighting integrated modules are arranged opposite to each other and penetrate into the gaps between adjacent conveying rollers, and are respectively used to photograph the sides of the flat glass placed on the conveying rollers and generate corresponding pictures for analysis and processing by the data processing module.

[0032] Preferably, the C-shaped shooting and lighting integrated module includes an upper light source arranged at the upper part of the C-shaped inner cavity, a first shooting module arranged at the upper chamfer of the C-shaped inner cavity, a side light source arranged at the vertical part of the C-shaped inner cavity, a second shooting module arranged at the lower chamfer of the C-shaped inner cavity, a lower light source arranged at the lower part of the C-shaped inner cavity, and a casing.

[0033] Preferably, the upper light source is used to provide light source for the upper chamfer of the side edge of the flat glass, the side light source is used to provide light source for the side edge of the flat glass, and the lower light source is used to provide light source for the lower chamfer of the flat glass.

[0034] Preferably, the position adjustment mechanism includes an adjusting frame, an adjusting screw, an adjusting screw nut, an adjusting slider, and an adjusting linear guide. The adjusting screw is arranged in the middle of the frame, the adjusting screw nut is sleeved on the adjusting screw, the adjusting slider and the adjusting linear guide are symmetrically arranged on both sides of the adjusting screw, the adjusting screw nut is connected to the slider through one side of a slider connecting plate, and an adjusting handwheel is provided at the end of the adjusting screw; the other side of the slider connecting plate is connected to the top of the C-type camera lighting integrated module through a connecting bracket.

[0035] The working process of this flat glass defect detection device is as follows:

[0036] The flat glass is transported by a glass conveying device and first passes through a glass straightening device to straighten the flat glass placed on a powered conveying roller with randomly distributed positions and postures. Then, the straightened flat glass passes through edge detection devices symmetrically arranged on both sides of the glass conveying device to detect edge defects of the glass, and then passes through a face detection device to detect face defects. Alternatively, the straightened flat glass first passes through the face detection device and then passes through the edge detection device.

[0037] The following description will be made by taking an example where the straightened glass first passes through the edge detection device and then passes through the face detection device.

[0038] When the sensor detects the presence of glass, it sends a glass signal to the control system. The control system that receives the signal sends a retraction signal to the drive cylinders of the left and right push mechanisms respectively to control the drive cylinders to switch to the retracted state (i.e., air is introduced into the rod chamber); when the drive cylinder retracts until the guide wheel contacts the glass but is not fully retracted, it will continue to retract, pushing the glass to move inward, so that the glass is automatically straightened by the guide wheel while moving forward, achieving the purpose of guiding the glass. If the sensor does not detect the glass, the drive cylinder switches from the retracted state to the fully extended state.

[0039] The guided glass continues to move forward. When it passes the edge detection device, the upper light source, side light source and lower light source of the two symmetrical C-shaped shooting and lighting integrated modules provide light sources to the upper, side and lower parts of the glass on the left and right sides respectively. The first shooting module on the upper side and the second shooting module on the lower side respectively shoot the side, upper part and lower part of the glass, and transmit the pictures to the data processing module for image analysis, processing and defect classification.

[0040] The glass that has passed the edge inspection continues to move forward. When passing the face inspection device, the first illumination module and the second illumination module provide light sources to the upper and lower surfaces of the glass respectively, and several face camera modules take pictures of the upper surface of the glass and transmit the pictures to the data processing module for image analysis, processing and defect classification. The edge inspection device and the face inspection device respectively detect the edge and surface defects, make a final classification of the glass defects, and make a final judgment on the glass quality.

[0041] Since the present invention adopts the above technical solution, the beneficial effects of this application are:

[0042] 1. A flat glass defect detection device of the present invention comprises a glass conveying device, wherein the glass conveying device comprises a conveying frame, a powered conveying roller and a glass guiding device; a face detection device for detecting defects on the glass surface; and an edge detection device for detecting defects on the edge of the glass. First, the flat glass in a random posture on the powered conveying roller is guided by the glass guiding device, and the guided glass is then subjected to edge defect detection and surface defect detection (the order of edge defect detection and surface defect detection can be reversed), so as to realize complete detection of the flat glass and classify the quality of the glass. Compared with traditional detection equipment, during the detection process, the position of the glass in the detection area is randomly distributed, which is not convenient for detecting edge defects and is not conducive to analyzing and classifying defects in the glass.

[0043] 2. In a flat glass defect detection device of the present invention, the edge detection device and the face detection device are set as two workstations. Compared with the setting integrated in one workstation, the requirements for the image acquisition module, the light source and the data processing module are reduced, and the manufacturing cost is reduced.

[0044] 3. A flat glass defect detection device of the present invention comprises a symmetrically arranged first side detection device and a second side detection device, which respectively comprise a C-type photographing and lighting integrated module, an edge beam connected to the face detection frame, and a position adjustment mechanism connected to the lower part of the edge beam. The position adjustment mechanism is connected to the top of the C-type photographing and lighting integrated module through a linear guide pair, and the C-shaped openings of the two symmetrical C-type photographing and lighting integrated modules are arranged opposite to each other. Therefore, the spacing between the symmetrically arranged C-type photographing and lighting integrated modules can be adjusted by the position adjustment mechanism, which can adapt to the edge detection of glass of different widths and has strong adaptability.

[0045] 4. A flat glass defect detection device of the present invention comprises a symmetrically arranged left pushing mechanism and a right pushing mechanism, wherein a driving cylinder thereof is connected to a guide screw nut via a cylinder connecting plate, and the guide screw nut is sleeved on the guide screw; the guide screw is connected to the inner surface of the bottom plate of the bracket via a screw support, so that the position of the cylinder is adjustable. When the widths of different types of glass vary greatly and exceed the telescopic stroke range of the cylinder, the position of the cylinder can be adjusted by the guide screw to ensure that the device can adapt to the position adjustment of the type of glass, and has strong adaptability.

[0046] 5. In a flat glass defect detection device of the present invention, a normally open air-controlled valve and a normally open electric-controlled valve are connected in parallel on the air inlet pipe of the rodless chamber of the driving cylinder, and an air storage tank is also provided which is respectively connected to the normally open air-controlled valve and the normally open electric-controlled valve. In case of unexpected situations such as power failure or gas failure, the cylinder can be automatically fully extended, which can effectively avoid damaging the glass and affecting the normal operation of the production line, thereby improving the safety performance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 It is a three-dimensional schematic diagram of a flat glass defect detection device of the present invention;

[0049] Figure 2 A three-dimensional schematic diagram of a glass guiding device of a glass conveying device of the present invention;

[0050] Figure 3 It is a three-dimensional schematic diagram of the left pushing mechanism or the right pushing mechanism of the present invention;

[0051] Figure 4 It is a rodless chamber air intake air path diagram of the driving cylinder of the left pushing mechanism or the right pushing machine of the present invention;

[0052] Figure 5 is a three-dimensional schematic diagram of a first side edge detection device or a second side edge detection device of the present invention;

[0053] Figure 6 is a three-dimensional schematic diagram of the position adjustment mechanism of the present invention;

[0054] The reference numerals are as follows:

[0055] 1. Glass conveying device; 11. Conveying frame; 12. Power conveying roller; 121. Conveying roller;

[0056] 13. Glass guiding device; 131. Left pushing mechanism; 132. Right pushing mechanism; 133. Guide wheel; 134. Bracket; 135. Driving cylinder; 136. Push plate; 138. Cylinder connecting plate; 139. Guide screw nut; 140. Guide screw; 141. Linear bearing; 142. Linear guide rail; 143. Vertical bracket; 144. Normally open gas control valve; 145. Normally open electric control valve; 146. Gas storage tank; 147. Hand wheel; 148. Fixing bracket; 149. Sensor bracket;

[0057] 2. face detection device; 21. face detection frame; 211. left leg; 212. right leg; 213. frame crossbeam; 22. image acquisition module; 23. first illumination module; 24. second illumination module; 25. data processing module;

[0058] 3. Edge detection device; 31. First side detection device; 32. Second side detection device; 33. C-type shooting illumination integrated module; 331. Upper light source; 332. First shooting module; 333. Side light source; 334. Second shooting module; 335. Lower light source; 336. Housing; 34. Edge beam; 35. Position adjustment mechanism; 36. Connecting bracket;

[0059] 4. Control system; 5. Flat glass. Specific embodiments

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that all directional indications in the embodiments of the present invention, such as first, second, up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] The present invention will be further described below in conjunction with the accompanying drawings:

[0064] Reference Figure 1-Figure 6 The present invention provides a flat glass defect detection device, comprising:

[0065] The glass conveying device 1 is used to convey the workpiece to be inspected, and includes a conveying frame 11, a power conveying roller 12 and a glass guiding device 13. The glass guiding device 13 is arranged on the lower side of the conveying roller 121 at the feeding end of the power conveying roller 12; the glass guiding device 13 includes a left pushing mechanism 131 and a right pushing mechanism 132. The left pushing mechanism 131 and the right pushing mechanism 132 are symmetrically arranged in the width direction of the power conveying roller 12. The left pushing mechanism 131 and the right pushing mechanism 132 are respectively provided with guiding wheels 133. The guiding wheels 133 are inserted in the gaps between adjacent conveying rollers 121. The symmetrically arranged guiding wheels 133 can be extended outward or retracted inward at the same time. When retracting inward, the guiding wheels 133 touch the glass to align it.

[0066] The face detection device 2 is mounted above the middle of the glass conveying device 1, and includes a face detection frame 21, an image acquisition module 22 arranged on the top of the face detection frame 21, a first illumination module 23 arranged at the front end of the face detection frame 21 for providing a light source for the upper surface of the glass, a second illumination module 21 arranged at the lower side of the conveying roller 121 of the power conveying roller 12 for providing a light source for the lower surface of the glass, and a data processing module 25 connected to the image acquisition module 22 for calculating and processing the collected image. The face detection device 2 is used for defect detection on the face of the flat glass after correction;

[0067] The edge detection device 3, including a first side edge detection device 31 and a second side edge detection device 32, is symmetrically arranged in the width direction of the power conveying roller 12, and is used to detect defects on both sides of the flat glass after being straightened:

[0068] The control system 4 is electrically connected to the glass conveying device 1, the image acquisition module 22, the data processing module 25 and the edge detection device 3 respectively; the flat glass 5 is conveyed by the glass conveying device 1,

[0069] In this embodiment, along the conveying direction of the powered conveying roller 12, the glass guiding device 13, the edge detection device 3 and the face detection device 2 are arranged from right to left in sequence. The flat glass 5 to be inspected first passes through the glass guiding device 13 to straighten the flat glass 5 with randomly distributed positions and postures placed on the powered conveying roller 12. Then, the straightened flat glass 5 passes through the edge detection devices 3 symmetrically arranged on both sides of the glass conveying device 1 for edge defect detection of the glass, and then passes through the face detection device 2 for face defect detection. This can achieve complete detection of the flat glass 5 and classify the quality of the glass. Compared with traditional detection equipment, during the detection process, the position of the glass in the detection area is randomly distributed, which is not convenient for detecting edge defects and is not conducive to analyzing and classifying the defects of the glass. In addition, the edge detection device 3 and the face detection device 2 are arranged at two different workstations, which reduces the requirements for the image acquisition module 22, the light source and the data processing module 25, and reduces the manufacturing cost. The left and right positions of the edge detection device 3 and the face detection device 2 can be adjusted, that is, the flat glass after passing through the glass guiding device 13 can be detected for face defects first and then for edge defects, and is not limited to the layout provided in this embodiment.

[0070] As a preferred embodiment, refer to Figure 2 and Figure 3The glass guiding device 13 also includes a bracket 134 connected to the glass conveying device 1, a left pushing mechanism 131 and a right pushing mechanism 132, each including a driving cylinder 135, a power output end of the driving cylinder 135 is connected to a push plate 136, and a guide wheel 133 is provided on the push plate 136; the driving cylinder 135 is connected to the guide screw nut 139 through a cylinder connecting plate 138, and the guide screw nut 139 is sleeved on the guide screw 140; the guide screw 140 is connected to the bracket 134 through a screw support; the rodless chambers of the driving cylinders 135 of the two pushing mechanisms are simultaneously inflated or under the action of their spring force, the guide wheel 133 on the push plate 136 can be driven to extend outward at the same time; the rod chambers of the driving cylinders 135 of the two pushing mechanisms are simultaneously inflated, which can drive the push plate 136 The guide wheels 133 on the upper and lower surfaces retract inwards at the same time; the symmetrically arranged driving cylinders 135 can move in opposite directions or at the same speed at the same time, so that the lateral displacement distance of the flat glass 5 is shorter, and the geometric center of the flat glass 5 to be inspected can be ensured to remain unchanged, so as to facilitate defect detection and detection data processing; in addition, the driving cylinder 135 is connected to the guide screw nut 139 through the cylinder connecting plate 138, and the guide screw nut 139 is sleeved on the guide screw 140; the guide screw 140 is connected to the bracket 134 through the screw support, so that the position of the driving cylinder 135 is adjustable. When the width of different types of glass varies greatly, it has exceeded the telescopic stroke range of the cylinder. At this time, the position of the driving cylinder 135 can be adjusted by the guide screw 140 to ensure that the device can adapt to the position adjustment of this type of glass, and has strong adaptability.

[0071] As a preferred embodiment, when the driving cylinder 135 is a single-acting cylinder, the push plate 136 extends outward at the same time under the action of the spring force inside the rodless cavity of the driving cylinder 135, so that in unexpected situations such as power outages or gas outages, the cylinder can be automatically fully extended, which can effectively avoid damaging the glass and affecting the normal operation of the production line, thereby improving the safety performance of the system.

[0072] As a preferred embodiment, refer to Figure 4 When the driving cylinder 135 is a double-acting cylinder, a normally open air-controlled valve 144 and a normally open electric-controlled valve 145 are connected in parallel on the air inlet pipe of the rodless chamber of the driving cylinder 135. There is also a gas storage tank 146 which is respectively connected to the normally open air-controlled valve 144 and the normally open electric-controlled valve 145. In the event of an unexpected situation such as power failure or gas failure, the cylinder can be automatically fully extended, which can effectively avoid damaging the glass and affecting the normal operation of the production line, thereby improving the safety performance of the system.

[0073] As a preferred embodiment, the driving cylinder 135 is a guideless cylinder, and the push plate 136 is connected to the outer surface of the top plate of the bracket 134 through a linear guide pair. The linear guide pairs are divided into two groups and are symmetrically arranged on both sides of the driving cylinder 135; the guide screw 140 is connected to the inner surface of the bottom plate of the bracket 134 through a screw support.

[0074] As a preferred embodiment, each set of linear guide pairs includes two linear bearings 141 and a linear guide 142, one of the linear bearings 141 is connected to the push plate 136, and the other is connected to the cylinder connecting plate 138; the linear guide 142 is connected to the outer surface of the top plate of the bracket 134 through a linear guide support.

[0075] As a preferred embodiment, the guide wheel 133 is connected to the push plate 136 via a vertical bracket 143 , so that the guide wheel 133 can pass through the gap of the conveying roller 121 .

[0076] As a preferred embodiment, at least two guide wheels 133 are provided on the push plate 136. In the present embodiment, two guide wheels 133 are provided on the push plate 136. Correspondingly, there are also two vertical brackets 133 connected to the guide wheels 133. The guide wheels 133 are arranged at the top of the vertical bracket 143. The left-right symmetrical setting of the guide wheels 133 allows the guide wheels 133 to be infinitely close to the inner side edge of the power conveying roller 12 of the glass conveying device 1. The overall structure is compactly arranged and the width utilization rate of the power conveying roller 12 is high.

[0077] As a preferred embodiment, the guide wheel 133 is a roller assembly that can rotate around its axis, and the outer side material of the roller assembly is a non-metallic material. In this embodiment, the outer side material of the roller assembly is polyurethane to prevent damage to the glass.

[0078] As a preferred embodiment, a guide hand wheel 147 is provided at the power output end of the guide screw 140 facing the driving cylinder 135, which is used to manually rotate the guide screw 140 to adjust the installation position of the driving cylinder 135 in the width direction on the glass conveying device 1, thereby adjusting the distance between the two symmetrically arranged left pushing mechanisms 131 and the right pushing mechanisms 132 to adapt to glasses of different widths.

[0079] As a preferred embodiment, a fixing frame 148 is further provided on the guiding hand wheel 147 for fastening the connection between the guiding hand wheel 147 and the guiding screw 140 to prevent the guiding hand wheel 147 from rotating freely.

[0080] As a preferred embodiment, a sensor bracket 149 is further provided on the bracket 134 for detecting whether glass to be corrected passes through.

[0081] As a preferred embodiment, the facial detection frame 21 spans across the width direction of the glass conveying device 1, and includes a symmetrically arranged left leg 211 and a right leg 212 and a frame beam 213. The left leg 211, the frame beam 213 and the right leg 212 are sequentially connected to the door-shaped facial detection frame 21. The left leg 211 and the right leg 212 are respectively fixed to the ground to ensure the stability of the facial detection device 2. At the same time, the facial detection device 2 and the glass conveying device 1 are separately arranged to reduce the vibration of the glass conveying device 1 transmitted to the image acquisition module 22, thereby ensuring the clarity of the captured image and reducing the difficulty of subsequent image analysis and processing.

[0082] As a preferred embodiment, the frame beam 213 includes an upper beam and a lower beam, and the upper beam and the lower beam bracket are connected by a plurality of vertical beams. The frame-type structure is easy to manufacture and more convenient to connect related equipment.

[0083] As a preferred embodiment, the image acquisition module 22 includes a plurality of facial camera modules, which are arranged at intervals on the upper beam, and are used to photograph the surface of the flat glass 5 placed on the conveyor roller 121 and generate corresponding pictures for analysis and processing by the data processing module 25.

[0084] As a preferred embodiment, the first illumination module 23 is disposed above the conveying roller 121, facing toward or away from the end of the glass guiding device 13, so as to provide illumination to the upper surface of the flat glass.

[0085] As a preferred embodiment, the second lighting module 24 is arranged on the left leg 211 and the right leg 212, which is lower than the conveying roller 121 in the height direction of the conveying frame 11 and is inserted into the gap between adjacent conveying rollers 121 to provide lighting for the lower surface of the flat glass 5 placed on the conveying roller 121.

[0086] As a preferred embodiment, refer to Figure 5 The first side detection device 31 and the second side detection device 32 respectively include a C-type shooting lighting integrated module 33, a side beam 34 connected to the face detection frame 21, and a position adjustment mechanism 35 connected to the lower part of the side beam 34. The position adjustment mechanism 35 is connected to the top of the C-type shooting lighting integrated module 33 through a linear guide pair.

[0087] As a preferred embodiment, the C-shaped openings of two symmetrical C-shaped shooting and lighting integrated modules 33 are arranged opposite to each other and penetrate the gaps between adjacent conveying rollers 121, and are respectively used to shoot the side edges of the flat glass 5 placed on the conveying rollers 121, and generate corresponding pictures for analysis and processing by the data processing module 25. Therefore, the spacing between the symmetrically arranged C-shaped shooting and lighting integrated modules 33 can be adjusted by the position adjustment mechanism 35, and can adapt to the edge detection of glass of different widths, with strong adaptability.

[0088] As a preferred embodiment, the C-type shooting and lighting integrated module 33 includes an upper light source 331 arranged at the upper part of the C-type inner cavity, a first shooting module 332 arranged at the upper chamfer of the C-type inner cavity, a side light source 333 arranged at the vertical part of the C-type inner cavity, a second shooting module 334 arranged at the lower chamfer of the C-type inner cavity, a lower light source 335 and a casing 336 arranged at the lower part of the C-type inner cavity. The edge detection device 3 has shooting modules arranged on the upper and lower parts of both sides of the flat glass 5, so as to capture the image of the side of the flat glass 5 in all directions without blind spots, thereby avoiding missed or misdetected defects.

[0089] As a preferred embodiment, the upper light source 331 is used to provide a light source for the upper chamfer of the side edge of the flat glass 5, the side light source 333 is used to provide a light source for the side edge of the flat glass 7, and the lower light source 335 is used to provide a light source for the lower chamfer of the flat glass 5. This can achieve all-round lighting of the edge of the flat glass 5 without blind spots, which helps the first shooting module 332 and the second shooting module 334 to take clearer glass pictures and avoid missed or false detection of defects.

[0090] As a preferred embodiment, refer to Figure 6 The position adjustment mechanism 35 includes an adjustment frame, an adjustment screw, an adjustment screw nut, an adjustment slider, and an adjustment linear guide rail. The adjustment screw is arranged in the middle of the frame, and the adjustment screw nut is sleeved on the adjustment screw. The adjustment slider and the adjustment linear guide rail are symmetrically arranged on both sides of the adjustment screw. The adjustment screw nut is connected to the slider through one side of the slider connecting plate, and an adjustment hand wheel is provided at the end of the adjustment screw; the other side of the slider connecting plate is connected to the top of the C-type camera lighting integrated module 33 through a connecting bracket 36; the position adjustment mechanism 35 can be manually adjusted according to the width of the glass, and can adapt to glasses of different widths, with strong adaptability.

[0091] The working process of this flat glass defect detection device is as follows:

[0092] The flat glass 5 is transported by the glass conveying device 1 and first passes through the glass straightening device 13 to straighten the flat glass 5 placed on the powered conveying roller 12 with randomly distributed positions and postures. Then, the straightened flat glass 5 passes through the edge detection devices 3 symmetrically arranged on both sides of the glass conveying device 1 to detect edge defects of the glass, and then passes through the face detection device 2 to detect face defects; or, the straightened flat glass first passes through the face detection device 2 and then passes through the edge detection device 3.

[0093] The following description will be made by taking an example that the straightened glass first passes through the edge detection device 3 and then passes through the face detection device 2 .

[0094] When the sensor detects the presence of glass, it sends a glass signal to the control system 4. The control system 4 receives the signal and sends a retraction signal to the driving cylinders 135 of the left pushing mechanism 131 and the right pushing mechanism 132 respectively to control the driving cylinders 135 to switch to the retracted state (i.e., air is introduced into the rod chamber); when the driving cylinder 135 retracts until the guiding wheel 133 contacts the glass and is not fully retracted, it will continue to retract, pushing the glass to move inward, so that the glass is automatically straightened by the guiding wheel 133 while moving forward, achieving the purpose of guiding the glass. If the sensor does not detect the glass, the driving cylinder 135 switches from the retracted state to the fully extended state.

[0095] The guided glass continues to move forward and when it passes the edge detection device 3, the upper light source 331, the side light source 333 and the lower light source 335 of the two symmetrical C-shaped shooting and lighting integrated modules 33 provide light sources to the upper, side and lower parts of the glass on the left and right sides respectively. The first shooting module 332 on the upper side and the second shooting module 334 on the lower side respectively shoot the upper side and lower side of the glass, and transmit the pictures to the data processing module 25 for image analysis, processing and defect classification.

[0096] The glass that has been inspected by the edge detection device 3 continues to move forward. When passing the face detection device 1, the first illumination module 23 and the second illumination module 24 provide light sources to the upper and lower surfaces of the glass respectively, and several face camera modules take pictures of the upper surface of the glass, and transmit the pictures to the data processing module 25 for image analysis, processing and defect classification. The results of the edge and surface defect detection by the edge detection device 3 and the face detection device 2 are combined to make a final classification of the glass defects and a final judgment on the glass quality.

[0097] The above is a detailed introduction to the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the methods and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A flat glass defect detection device, characterized in that: include: A glass conveying device is used to convey the workpiece to be inspected, comprising a conveying frame, a power conveying roller and a glass guiding device, wherein the glass guiding device is arranged at the lower side of the conveying roller at the feeding end of the power conveying roller; the glass guiding device comprises a left pushing mechanism and a right pushing mechanism, wherein the left pushing mechanism and the right pushing mechanism are symmetrically arranged in the width direction of the power conveying roller, and the left pushing mechanism and the right pushing mechanism are respectively provided with guiding wheels, wherein the guiding wheels are inserted in the gaps between adjacent conveying rollers, and the symmetrically arranged guiding wheels can be extended outward or retracted inward at the same time, and when retracted inward, the guiding wheels touch the glass to align it; A face detection device is mounted above the middle of the glass conveying device, comprising a face detection frame, an image acquisition module arranged on the top of the face detection frame, a first illumination module arranged at the front end of the face detection frame for providing a light source for the upper surface of the glass, a second illumination module arranged at the lower side of the conveying roller of the power conveying roller and for providing a light source for the lower surface of the glass, and a data processing module connected to the image acquisition module for calculating and processing the collected image, and is used for detecting facial defects of the flat glass after correction; An edge detection device, comprising a first side edge detection device and a second side edge detection device, symmetrically arranged in the width direction of the power conveying roller, for detecting defects on both side edges of the straightened flat glass; A control system, electrically connected to the glass conveying device, the image acquisition module, the data processing module and the edge detection device respectively; The glass guiding device also includes a bracket connected to the glass conveying device, and the left pushing mechanism and the right pushing mechanism each include a driving cylinder, a push plate is connected to the power output end of the driving cylinder, and a guiding wheel is provided on the push plate; The face detection frame spans across the width direction of the glass conveying device, and includes symmetrically arranged left and right legs and a frame crossbeam; The first side detection device and the second side detection device respectively include a C-shaped shooting and lighting integrated module, a side beam connected to the face detection frame, and a position adjustment mechanism connected to the lower part of the side beam, and the position adjustment mechanism is connected to the top of the C-shaped shooting and lighting integrated module through a linear guide pair; The adjustment mechanism includes an adjustment frame, an adjustment screw, an adjustment screw nut, an adjustment slider, and an adjustment linear guide rail. The adjustment screw is arranged in the middle of the frame, the adjustment screw nut is sleeved on the adjustment screw, the adjustment slider and the adjustment linear guide rail are symmetrically arranged on both sides of the adjustment screw, the adjustment screw nut is connected to the slider through one side of a slider connecting plate, and an adjustment handwheel is provided at the end of the adjustment screw; the other side of the slider connecting plate is connected to the top of the C-type camera lighting integrated module through a connecting bracket.

2. A flat glass defect detection device according to claim 1, characterized in that: The driving cylinder is connected to the guide screw nut through a cylinder connecting plate, and the guide screw nut is sleeved on the guide screw; the guide screw is connected to the bracket through a screw support; the rodless chambers of the driving cylinders of the two pushing mechanisms are simultaneously filled with air or under the action of the spring force of the rodless chambers, the guide wheels on the push plates can be driven to extend outward at the same time; the rod chambers of the driving cylinders of the two pushing mechanisms are simultaneously filled with air, which can drive the guide wheels on the push plates to retract inward at the same time.

3. A flat glass defect detection device according to claim 2, characterized in that: The driving cylinder is a single-acting cylinder, and the push plates are simultaneously extended outwards under the action of the spring force inside the rodless cavity of the single-acting cylinder.

4. A flat glass defect detection device according to claim 2, characterized in that: When the driving cylinder is a double-acting cylinder, a normally open air-controlled valve and a normally open electric-controlled valve are connected in parallel on the air inlet pipeline of the rodless chamber of the driving cylinder, and an air storage tank is also provided which is connected to the normally open air-controlled valve and the normally open electric-controlled valve respectively.

5. A flat glass defect detection device according to any one of claims 2 to 4, characterized in that: The driving cylinder is a non-guided cylinder, and the push plate is connected to the outer surface of the top plate of the bracket through a linear guide pair. The linear guide pairs are in two groups and are symmetrically arranged on both sides of the driving cylinder.

6. A flat glass defect detection device according to any one of claims 1 to 4, characterized in that: The left leg, the frame crossbeam and the right leg are sequentially connected to form a door-shaped face detection frame, and the left leg and the right leg are respectively fixed to the ground.

7. A flat glass defect detection device according to claim 6, characterized in that: The first illumination module is arranged above the conveying roller and faces toward or away from the end of the glass guiding device; the second illumination module is arranged on the left leg and the right leg, is lower than the conveying roller in the height direction of the conveying frame, and is arranged in the gap between adjacent conveying rollers.

8. A flat glass defect detection device according to claim 1, characterized in that: The C-shaped openings of two symmetrical C-shaped shooting and lighting integrated modules are arranged opposite to each other and penetrate into the gaps between adjacent conveying rollers, and are respectively used to shoot the side edges of the flat glass placed on the conveying rollers.

9. A flat glass defect detection device according to claim 8, characterized in that: The C-shaped shooting and lighting integrated module includes an upper light source arranged at the upper part of the C-shaped inner cavity, a first shooting module arranged at the upper chamfer of the C-shaped inner cavity, a side light source arranged at the vertical part of the C-shaped inner cavity, a second shooting module arranged at the lower chamfer of the C-shaped inner cavity, a lower light source arranged at the lower part of the C-shaped inner cavity, and a casing.

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