CN110694922A - Glass defect on-line measuring equipment - Google Patents
Glass defect on-line measuring equipment Download PDFInfo
- Publication number
- CN110694922A CN110694922A CN201910905489.XA CN201910905489A CN110694922A CN 110694922 A CN110694922 A CN 110694922A CN 201910905489 A CN201910905489 A CN 201910905489A CN 110694922 A CN110694922 A CN 110694922A
- Authority
- CN
- China
- Prior art keywords
- detected
- product
- detection
- laser
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011521 glass Substances 0.000 title claims abstract description 92
- 230000007547 defect Effects 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 claims abstract description 97
- 238000003708 edge detection Methods 0.000 claims abstract description 60
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 8
- 230000002950 deficient Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 10
- 208000003464 asthenopia Diseases 0.000 abstract description 3
- 230000001960 triggered effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007723 transport mechanism Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
- B07C5/362—Separating or distributor mechanisms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
- G01N2021/9586—Windscreens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses an online glass defect detection device, which is used for detecting surface defects and edge defects of glass sheets or other sheet-shaped products and comprises the following components: the conveying mechanism is used for driving the product to be detected to advance at a certain speed; the surface detection mechanism comprises a front detection device and a back detection device and is used for respectively detecting the upper surface and the lower surface of a product to be detected; the edge detection mechanism comprises a plurality of sets of edge detection devices which are arranged on the conveying mechanism at certain intervals, and the plurality of sets of edge detection devices can realize the covering detection of all edges of products to be detected. The invention can carry out real-time online detection and analysis on the defects of the surface, the side surface and the like of the glass sheet or other sheet-shaped products, has high accuracy, high detection speed, no need of pause in the detection process and high automation degree, can replace manual detection, and greatly reduces the missing detection and the false detection caused by manual visual fatigue.
Description
Technical Field
The invention relates to glass defect online detection equipment, and further relates to glass defect universal detection equipment, belonging to the field of machine vision.
Background
With the development of economy, automobiles have already entered ordinary households, and the yield of automobile glass is higher and higher. However, since automobile glass production enterprises have very high requirements on glass on-line detection, especially glass edge edging detection, the detection technology in this aspect is a blank in China, and high-end detection technologies are always mastered by foreign manufacturers.
In addition, the existing glass defect detection equipment also has the problems of low detection precision, high missing detection and false detection rate, pause in the test process, low production rate and the like.
Therefore, how to provide an online glass defect detection device, which can effectively overcome the above defects in the prior art, is an important research topic for those skilled in the art in the prior art.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art.
Therefore, the invention aims to provide an online glass defect detection device, which is used for detecting surface defects and edge defects of glass sheets or other sheet-shaped products and specifically comprises the following components:
the conveying mechanism is used for driving the product to be detected to advance at a certain speed;
the surface detection mechanism comprises a front detection device and a back detection device and is used for respectively detecting the upper surface and the lower surface of the product to be detected;
the edge detection mechanism comprises a plurality of sets of edge detection devices which are arranged on the conveying mechanism at certain intervals, and the plurality of sets of edge detection devices can realize the coverage detection of all edges of the product to be detected;
and the waste kicking mechanism comprises a conveying roller and a transplanting manipulator and is used for removing the defective products.
The front and back detection sequences of the surface detection mechanism and the edge detection mechanism can be exchanged, the surface detection mechanism can be arranged in front of the edge detection mechanism, and the edge detection mechanism can be arranged behind the edge detection mechanism; or the edge detection mechanism is in front and the surface detection mechanism is in back. Moreover, the surface detection mechanism and the edge detection mechanism can be used independently and respectively form independent equipment, so that the detection with single function is realized.
The invention relates to glass defect online detection equipment, which is used for detecting surface defects and edge defects of glass sheets or other sheet-shaped products, such as solar glass, liquid crystal screens, building glass, automobile glass and the like, based on an advanced machine vision method. The invention can carry out real-time online detection and analysis on defects such as edge breakage, fingerprints, scratches, stains, cracks, bubbles, flaws, side surface grinding failure and the like on the surface of a glass sheet or other sheet-shaped products, has high accuracy, high detection speed, no need of pause in the detection process and high automation degree, can replace manual detection, and greatly reduces missing detection and false detection caused by manual visual fatigue.
On the basis of the technical scheme, the invention can be improved as follows:
preferably, a plurality of photoelectric sensors are mounted on the conveying mechanism and used for sensing the advancing position of the product to be detected and carrying out quantity statistics so as to trigger the corresponding front detection device, the back detection device and the edge detection device.
The photoelectric sensor can be replaced by a laser correlation switch.
Preferably, the transportation mechanism comprises a power roller driven by an external motor and a rubber ring sleeved on the power roller, and the rubber ring is used for assisting the product to be detected to move forward.
Preferably, the front detection device includes a first light source and a first camera located above the product to be detected, and light rays emitted by the first light source and reflected back after contacting the upper surface of the product to be detected are received by the first camera; the back detection device comprises a second light source and a second camera which are positioned below the product to be detected, and light rays emitted by the second light source and reflected back after contacting the lower surface of the product to be detected can be received by the second camera.
In the invention, the front detection device and the back detection device have the same structure and light path and are opposite in position, so that the front defect and the back defect of the product are respectively detected, and finally the detected defects are sent to a corresponding computer for analysis and processing, and the product to be detected does not need to be stopped in the detection process.
Preferably, the installation positions of the first light source and the first camera above the product to be detected are opposite to the installation positions of the second light source and the second camera below the product to be detected.
In order to avoid mutual interference, the invention adopts a reverse design, namely the vertical positions of the first light source and the second camera are the same, and the vertical positions of the first camera and the second light source are the same, so that the light source can not cause interference to the camera on the opposite side.
In addition, the first light source and the second light source are preferably high-brightness linear scanning strip-shaped light sources or strip-shaped surface light sources, and the length of the first light source and the second light source is not less than the width of the detected glass contour perpendicular to the advancing direction.
Preferably, an included angle between extension lines of light emitting ends of the first light source and the second light source and the product to be detected is 40-70 degrees, which is an optimal angle design range, and under the angle, images of the upper surface and the lower surface of the product to be detected can be shot most clearly and comprehensively.
Preferably, the edge detection devices are four or six sets; when the number of the four sets of the edge detection devices is four, the four sets of the edge detection devices are combined into a group two by two, the two groups of the edge detection devices are respectively positioned at two sides of the product to be detected, which are vertical to the advancing direction of the product to be detected, and are opposite to the edge of the product to be detected, and the four sets of the edge detection devices can realize the covering detection of all the edges of the product to be detected; when the number of the edge detection devices is six, the edge detection mechanism is additionally provided with one set of edge detection device between two sets of edge detection devices on the basis of four sets of edge detection devices.
In other words, six sets of edge detection devices are added with two sets of edge detection devices on the basis of four sets of edge detection devices according to the complexity of the glass profile and on two sides perpendicular to the traveling direction of the glass as required.
Preferably, the edge detection device comprises a laser power supply, a laser, a beam splitter, a light trap, a first prism, a second prism, a third prism and a third camera;
the laser detection light beam emitted by the laser is over against the edge of the product to be detected, the laser is driven by the laser power supply, and the laser power supply is controlled by the computer and the laser controller connected with the computer in a communication way;
the beam splitter is positioned between the laser and the product to be detected, the light splitting surface of the beam splitter and the laser detection light beam emitted by the laser form an angle of 44-46 degrees, so that the light path of the laser returning after emitting the laser and irradiating the surface of the glass sheet slightly deviates a certain angle, the interference of the emitting light path and the returning light path is avoided, the laser detection light beam emitted by the laser is transmitted by the beam splitter and is divided into a main light beam and an auxiliary light beam, the light trap is positioned on one side of the beam splitter, the connecting line of the light trap and the beam splitter is perpendicular to the main light beam, and the auxiliary light beam can be absorbed by the light trap; the main light beam can irradiate the edge of the product to be detected to be reflected, and the reflected main light beam reaches the third camera after being reflected by the beam splitter, the first prism, the second prism and the third prism step by step;
the first camera, the second camera and the third camera upload the shot image gray scale information to the computer for analysis, the computer is connected with a PLC, and the computer connected with the PLC can adjust the power of the laser through the laser controller by taking the image gray scale information shot by the cameras as a basis.
In particular, the first camera, the second camera and the third camera may be line scan cameras or area array cameras, preferably line scan cameras.
The edge detection devices are designed by adopting the structure, the laser detection light beams emitted by the lasers respectively aim at different edges of the product to be detected, and the edge detection devices can detect all edges of the product to be detected in the advancing process of the product to be detected, so that the problem of missed detection is avoided, and the product to be detected does not need to pause in the detection process.
Preferably, the first prism with the second prism is fixed on a fixing frame, the third prism with the third camera is fixed on a fixing plate, the fixing frame is fixed on a guide rail, the guide rail is driven by a stepping motor or a servo motor to move up and down so as to change the length of the light path in the vertical direction, and the stepping motor or the servo motor is controlled by the computer.
In the process of advancing the product to be detected, the length of the light path is changed through the stepping motor or the servo motor, so that the total distance between the third camera and the edge of the product to be detected is basically constant within the acceptable range of the depth of field. For example, when the edge of the product to be detected has a concave section, the motor can control the first prism and the second prism to move downwards to enable the first prism and the second prism to approach the product to be detected; when the edge of the product to be detected has the convex section, the motor can control the first prism and the second prism to move upwards, so that the first prism and the second prism are far away from the product to be detected.
Preferably, the contour diagram of the product to be detected is input into a software program of the computer in advance, so that the computer can continuously transmit signals to the stepping motor or the servo motor to realize the control of the motor to match the contour.
Preferably, the design wavelength of the beam splitting film of the beam splitter is consistent with the laser central wavelength of the laser, and the diameter of a laser spot emitted by the laser is not less than the thickness of a product to be detected.
Preferably, the first prism, the second prism and the third prism are total reflection right-angle prisms, and can be quartz or other materials with higher light transmittance, and the side lengths of the laser incident surface and the laser emergent surface of the first prism and the second prism are both larger than the diameter of a laser spot.
According to the technical scheme, compared with the prior art, the invention discloses the glass defect online detection equipment which at least has the following beneficial effects:
1) the invention can carry out real-time online detection and analysis on defects of surface edge breakage, fingerprints, scratches, stains, cracks, bubbles, flaws, side surface grinding failure and the like of glass or other sheet products, has high accuracy and high detection speed, does not need to stop in the test process, and does not influence the production rate.
2) The invention can automatically adjust the laser illumination intensity and avoid illumination errors in manual adjustment.
3) The invention can automatically adjust the working distance according to the outline of the product to be detected, and sheet products such as glass and the like in any shape can be accurately detected.
4) The invention can automatically calibrate the initial positions of the first prism and the second prism according to the outlines of different products to be detected, and introduce the tracking curves of the outlines of the different products to be detected, thereby ensuring that the total distance between the third camera and the edge of the product to be detected is basically constant within an acceptable range of the depth of field in the detection of the products with different outlines, and realizing the rapid switching of different glass specifications.
5) The invention has stable program algorithm, and the defect size determination standard is adjustable through software configuration, thereby not only replacing manual detection, but also avoiding false detection and missing detection caused by manual visual fatigue.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of an online glass defect detection device provided by the invention;
FIG. 2 is a first structural diagram of an online glass defect detecting apparatus according to the present invention;
FIG. 3 is a second structural diagram of an online glass defect inspection apparatus according to the present invention;
FIG. 4 is an overall structure diagram of the glass defect on-line detection device provided by the present invention after being installed;
FIG. 5 is a schematic diagram of an edge detection apparatus according to the present invention;
FIG. 6 is a schematic view of a specific structure of the waste kicking mechanism provided by the present invention;
wherein, in the figure,
1-a first camera, 2-a first light source, 3-a second light source, 4-a second camera; 5-laser, 6-laser power supply, 7-optical trap, 8-beam splitter, 9-first prism, 10-second prism, 11-third camera, 12-fixing frame, 13-guide rail, 14-stepping motor or servo motor, 15-computer, 16-glass sheet, 17-power roller, 18-rubber ring, 19-front detection device, 20-edge detection device, 21-photoelectric sensor I, 22-photoelectric sensor II, 23-third prism, 24-transplanting manipulator and 25-fixing plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An on-line glass defect inspection apparatus according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 6.
Example (b):
as shown in fig. 1-6, the present invention discloses an on-line glass defect inspection apparatus, which is based on advanced machine vision method for inspecting surface defects and edge defects of glass sheets 16 or other sheet-like products, such as automotive glass.
The specific technical solution of the present embodiment will be described in detail below by taking the detection glass sheet 16 as an example.
The glass defect online detection equipment comprises: the device comprises a conveying mechanism, a surface detection mechanism, an edge detection mechanism and a waste kicking mechanism. The transport mechanism is used to drive the glass sheet 16 at a certain speed. The surface inspection mechanism includes a front inspection device 19 and a back inspection device for inspecting the upper and lower surfaces of the glass sheet 16, respectively. The edge detection mechanism comprises four or six sets of edge detection devices 20 which are arranged on the transportation mechanism at a certain interval, when the number of the edge detection devices is four, as shown in figure 2, the four sets of edge detection devices 20 are formed into a group in pairs, two sets of edge detection devices are respectively positioned at two sides of the glass sheet 16 which is vertical to the advancing direction of the glass sheet and are opposite to the edge of the glass sheet 16, and the four sets of edge detection devices 20 can realize the covering detection of all the edges of the glass sheet 16; in the case of six sets, as shown in fig. 3, the edge detection mechanism adds an additional set of edge detection devices 20 between each set of edge detection devices 20 to account for glass sheets 16 having complex profiles. The following embodiment is described in detail according to the specification of the edge detecting device 20 as four sets. The waste kicking mechanism comprises a conveying roller and a transplanting manipulator 24, and the transplanting manipulator 24 comprises a pneumatic lifting device and a transverse conveying device and is used for removing defective products.
In particular, the method comprises the following steps of,
as shown in fig. 1, two photosensors are mounted on the transport mechanism: a first photosensor 21 and a second photosensor 22. When the glass sheet 16 moves to the position of the first photoelectric sensor 21, the front detection device 19 and the back detection device are triggered to start; when the glass sheet 16 moves to the position of the second photosensor 22, the edge detection device 20 is triggered to activate.
The two photosensors described above may further be used for counting the number of glass sheets 16, and these photosensors may also be replaced by laser correlation switches.
The transport mechanism comprises a power roller 17 driven by an external motor and a rubber ring 18 sleeved on the power roller 17, wherein the rubber ring 18 is used for assisting the glass sheet 16 to move at a certain speed.
The front detection device 19 comprises a first light source 2 and a first camera 1 which are positioned above the glass sheet 16, and light rays emitted by the first light source 2 and reflected back after contacting the upper surface of the glass sheet 16 are received by the first camera 1; the back side detection device comprises a second light source 3 and a second camera 4 which are positioned below the glass sheet 16, and light rays reflected back after light rays emitted by the second light source 3 contact the lower surface of the glass sheet 16 can be received by the second camera 4. It should be further emphasized here that the number of cameras in the front face detection device 19 may not be limited to two, and depending on the width of the glass sheet 16, one light source may need one, two or even more cameras to capture images, ensuring complete coverage of the field of view.
In this embodiment, the mounting positions of the first light source 2 and the first camera 1 above the glass sheet 16 are opposite to the mounting positions of the second light source 3 and the second camera 4 below the glass sheet 16 so that the light sources do not interfere with the opposite-side cameras.
The angle between the extension of the light exit ends of the first light source 2 and the second light source 3 and the glass sheet 16 is preferably in the range of 40 ° to 70 °.
Further, the first light source 2 and the second light source 3 are preferably high-luminance line-scan stripe-shaped light sources or stripe-shaped surface light sources.
As shown in fig. 1 and 2, four sets of edge detection devices 20 are distributed around the edge of the glass sheet 16, and a specific structure of any one set of edge detection devices 20 will now be described:
as shown in fig. 5, the edge detection device 20 includes a laser power source 6, a laser 5, a beam splitter 8, a light trap 7, a first prism 9, a second prism 10, a third camera 11, a fixing frame 12, a guide rail 13, a stepping motor or a servo motor 14, a third prism 23, and a fixing plate 25;
the laser 5 is driven by a laser power supply 6, and the laser power supply 6 is controlled by a computer 15 and a laser controller connected with the computer 15 in a communication way;
the beam splitter 8 is positioned between the laser 5 and the glass sheet 16, the light splitting surface of the beam splitter 8 and the laser detection light beam emitted by the laser 5 form an angle of 44-46 degrees, preferably an angle of 45 degrees, the laser detection light beam emitted by the laser 5 is transmitted by the beam splitter 8 and is divided into a main light beam and a sub-light beam, the light trap 7 is positioned on one side of the beam splitter 8, the connecting line of the light trap 7 and the beam splitter 8 is vertical to the main light beam, and the sub-light beam can be absorbed by the light trap 7; the main light beam irradiates the edge of the glass sheet 16 to be reflected, and the reflected main light beam reaches the third camera 11 after being reflected step by the beam splitter 8, the first prism 9, the second prism 10 and the third prism 23;
the first camera 1, the second camera 4 and the third camera 11 upload the captured image gray scale information to the computer 15 for analysis, the computer 15 is connected with a PLC, and the computer 15 connected with the PLC adjusts the power of the laser 5 through the laser controller according to the image gray scale information captured by the cameras.
The computer 15 and the PLC may be implemented in one or two entities, and the computer 15 implements the operation of the motor through the PLC or the motion control card, for example, the PLC of Beckhoff in germany implements the function of softPLC in one computer 15; a motion control card can also be inserted into the computer 15 to realize the functions of part of the PLC; while most factory computers 15 and PLCs are separate devices.
The invention can accurately detect the glass sheet 16 with any shape, and for the glass sheet 16 with different specifications and shapes, especially in the area with the edge curvature of the glass sheet 16 changing violently, the computer 15 connected with the PLC can control the laser controller according to the average gray value of the region of interest (ROI), automatically increase or decrease the strength with fixed percentage, ensure the average gray value balance of the whole edge, and the defect can be shot clearly.
The first prism 9 and the second prism 10 are fixed on a fixed frame 12, the third prism 23 and the third camera 11 are fixed on a fixed plate 25, the fixed frame 12 is fixed on a guide rail 13, the guide rail 13 is driven by a stepping motor or a servo motor 14 to move up and down so as to change the length of a light path in the vertical direction, and the total distance between the third camera 11 and the edge of the glass sheet 16 is basically constant within the range allowed by the depth of field in the moving process of the glass sheet 16.
The stepper motor or servo motor 14 is controlled by a computer 15. In addition, other motors in the apparatus may also be controlled by the computer 15.
The profile of the glass sheet 16 must be entered into the software program of the computer 15 in advance to ensure that the computer 15 will continuously transmit signals to the stepping motor or servo motor 14 to control the motor.
In order to further optimize the above technical solution, the design wavelength of the beam splitting film of the beam splitter 8 should be consistent with the central wavelength of the laser 5, and the diameter of the laser spot emitted by the laser 5 should be not less than the thickness of the glass sheet 16 to be detected.
In order to further optimize the above technical solution, the first prism 9, the second prism 10, and the third prism 23 are total reflection right-angle prisms, which may be quartz or other materials with high light transmittance, and the side lengths of the laser incident surface and the laser emergent surface thereof should be larger than the diameter of the laser spot.
The invention relates to a glass defect online detection device, which comprises the following specific working processes:
1. the glass sheet 16 travels at a certain speed over a rubber ring 18 on a powered roller 17;
2. when the glass sheet 16 moves to the position of the first photoelectric sensor 21, the first strip light source 2 and the second strip light source 3 are triggered to irradiate, and the first camera 1 and the second camera 4 are triggered to take a picture; specifically, light emitted by the first bar light source 2 is irradiated to the upper surface of the glass sheet 16, and is reflected by the upper surface of the glass sheet 16 to the first camera 1; the light emitted by the second strip-shaped light source 3 irradiates the lower surface of the glass sheet 16, and is reflected by the lower surface of the glass sheet 16 and then reaches the second camera 4;
3. when the glass sheet 16 continuously moves to the position of the second photoelectric sensor 22, the laser 5 is triggered to emit a laser detection beam and the third camera 11 is triggered to take a picture;
4. when the glass sheet 16 continuously moves to the position of the second photoelectric sensor 22, the stepping motor or the servo motor 14 is triggered to drive the prism to move up and down, specifically, the stepping motor or the servo motor 14 drives the guide rail 13 to drive the fixing frame 12 to move up and down to a set position, and the first prism 9 and the second prism 10 move along with the fixing frame 12;
5. the laser detection light beam emitted by the laser 5 is divided into two beams by the beam splitter 8, and the secondary light beam reaches the light trap 7 and is reflected and absorbed; the main light beam reaches the edge of the glass sheet 16 through the beam splitter 8, light irradiated to the edge of the glass sheet 16 is subjected to diffuse reflection, wherein a part of the diffuse reflection light returns to the beam splitter 8, and then the image of the edge of the glass sheet 16 is clearly reflected to the third camera 11 through the first prism 9, the second prism 10 and the third prism 23;
6. the first camera 1, the second camera 4 and the third camera 11 respectively upload imaging results to the computer 15, and a software program on the computer 15 automatically adjusts the power of the laser 5 according to the image gray scale information uploaded by the cameras by a laser power supply;
7. the computer 15 can analyze the type, size and position of the defect after program processing, and finally sends the defect to the PLC for waste kicking;
8. the waste kicking mechanism receives a PLC waste kicking signal, and then transfers the defective products to a defective product conveying line through the transplanting manipulator 24, so that the waste kicking is realized without stop.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An on-line glass defect inspection apparatus for inspecting surface and edge defects of glass sheets or other sheet-like products, comprising:
the conveying mechanism is used for driving the product to be detected to advance at a certain speed;
the surface detection mechanism comprises a front detection device (19) and a back detection device and is used for respectively detecting the upper surface and the lower surface of the product to be detected;
the edge detection mechanism comprises a plurality of sets of edge detection devices (20) which are arranged on the conveying mechanism at certain intervals, and the plurality of sets of edge detection devices (20) can realize the covering detection of all edges of the product to be detected;
and the waste kicking mechanism comprises a conveying roller and a transplanting manipulator (24) and is used for removing the defective products.
2. A glass defect on-line detection device according to claim 1, characterized in that a plurality of photoelectric sensors are installed on the transportation mechanism for sensing the advancing position of the products to be detected and counting the number of the products to be detected so as to trigger the corresponding front detection device (19), back detection device and edge detection device (20).
3. The on-line glass defect detection equipment according to claim 1, wherein the transportation mechanism comprises a power roller (17) driven by an external motor and a rubber ring (18) sleeved on the power roller (17), and the rubber ring (18) is used for assisting the product to be detected to advance.
4. The glass defect online detection equipment according to claim 1, wherein the front detection device (19) comprises a first light source (2) and a first camera (1) which are positioned above the product to be detected, and light rays emitted by the first light source (2) and reflected back after contacting the upper surface of the product to be detected are received by the first camera (1); the back detection device comprises a second light source (3) and a second camera (4) which are positioned below the product to be detected, and light rays emitted by the second light source (3) are received by the second camera (4) after contacting the lower surface of the product to be detected and reflected back.
5. A glass defect online detection device according to claim 4, characterized in that the installation positions of the first light source (2) and the first camera (1) above the product to be detected are opposite to the installation positions of the second light source (3) and the second camera (4) below the product to be detected.
6. A glass defect online detection device according to claim 4, characterized in that the included angle between the extension line of the light emitting ends of the first light source (2) and the second light source (3) and the product to be detected is 40-70 degrees.
7. The on-line glass defect detection equipment according to claim 1, wherein the edge detection devices (20) are four sets or six sets; when the number of the four sets of the edge detection devices (20) is four, the four sets of the edge detection devices (20) are combined into a group two by two, the two groups of the edge detection devices are respectively positioned at two sides of the product to be detected, which are vertical to the advancing direction of the product to be detected, and are opposite to the edge of the product to be detected, and the four sets of the edge detection devices (20) can realize the covering detection of all the edges of the product to be detected; and when the number of the edge detection mechanisms is six, the edge detection mechanism is additionally provided with one set of edge detection device (20) between two sets of edge detection devices on the basis of four sets of edge detection devices (20).
8. The glass defect online detection equipment according to claim 1 or 7, characterized in that the edge detection device (20) comprises a laser power supply (6), a laser (5), a beam splitter (8), an optical trap (7), a first prism (9), a second prism (10), a third prism (23), and a third camera (11);
the laser detection light beam emitted by the laser (5) is over against the edge of the product to be detected, the laser (5) is driven by the laser power supply (6), and the laser power supply (6) is controlled by a computer (15) and a laser controller connected with the computer (15) in a communication way;
the beam splitter (8) is positioned between the laser (5) and the product to be detected, the beam splitting surface of the beam splitter (8) and a laser detection beam emitted by the laser (5) form an angle of 44-46 degrees, the laser detection beam emitted by the laser (5) is transmitted by the beam splitter (8) and is divided into a main beam and a sub-beam, the light trap (7) is positioned on one side of the beam splitter (8), the connecting line of the light trap (7) and the beam splitter (8) is vertical to the main beam, and the sub-beam can be absorbed by the light trap (7); the main light beam can irradiate the edge of the product to be detected to be reflected, and the reflected main light beam reaches the third camera (11) after being reflected by the beam splitter (8), the first prism (9), the second prism (10) and the third prism (23) step by step;
the first camera (1), the second camera (4) and the third camera (11) can upload the shot image gray scale information to the computer (15) for analysis, the computer (15) is connected with a PLC, and the computer (15) connected with the PLC can adjust the power of the laser (5) through the laser controller according to the image gray scale information shot by the cameras.
9. A glass defect on-line detecting device according to claim 8, characterized in that the first prism (9) and the second prism (10) are fixed on a fixing frame (12), the third prism (23) and the third camera (11) are fixed on a fixing plate (25), the fixing frame (12) is fixed on a guide rail (13), the guide rail (13) is driven by a stepping motor or a servo motor (14) to move up and down to change the length of the light path in the vertical direction, and the stepping motor or the servo motor (14) is controlled by the computer (15).
10. An on-line glass defect inspection apparatus as claimed in claim 9, wherein the profile of the product to be inspected has to be entered into the software program of the computer (15) in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910905489.XA CN110694922A (en) | 2019-09-24 | 2019-09-24 | Glass defect on-line measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910905489.XA CN110694922A (en) | 2019-09-24 | 2019-09-24 | Glass defect on-line measuring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110694922A true CN110694922A (en) | 2020-01-17 |
Family
ID=69196167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910905489.XA Pending CN110694922A (en) | 2019-09-24 | 2019-09-24 | Glass defect on-line measuring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110694922A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988550A (en) * | 2019-12-17 | 2020-04-10 | 合肥诺宸智能装备有限公司 | Automatic test platform of product signal |
| CN112665522A (en) * | 2020-10-27 | 2021-04-16 | 东莞南玻太阳能玻璃有限公司 | Device and method for monitoring online curvature of float glass in real time |
| CN113245242A (en) * | 2021-06-17 | 2021-08-13 | 苏州中科行智智能科技有限公司 | Glass slide defect detecting and sorting system |
| CN113587809A (en) * | 2021-06-28 | 2021-11-02 | 彩虹（合肥）液晶玻璃有限公司 | Automatic detection system and detection method for edge and breadth of plate glass |
| CN113798200A (en) * | 2021-09-17 | 2021-12-17 | 南京孚克讯新材料有限公司 | Slide glass automatic detection platform based on visual detection and detection method thereof |
| CN113834462A (en) * | 2021-08-05 | 2021-12-24 | 山西光兴光电科技有限公司 | Method and device for detecting warping of glass substrate |
| CN113945491A (en) * | 2021-09-01 | 2022-01-18 | 郑州旭飞光电科技有限公司 | Glass substrate surface particle detection system |
| CN114322774A (en) * | 2022-01-05 | 2022-04-12 | 河北省送变电有限公司 | Quality inspection device for angle steel production line and positioning detection method thereof |
| CN115031633A (en) * | 2022-08-11 | 2022-09-09 | 长春光华微电子设备工程中心有限公司 | On-board detection system of laser scribing machine and detection method thereof |
| CN117571746A (en) * | 2024-01-16 | 2024-02-20 | 深圳市中研创科技有限公司 | Glass defect visual detection device and detection method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315654A (en) * | 1969-05-21 | 1973-05-02 | Pilkington Brothers Ltd | Detection of faults in transparent material using lasers |
| JPH07190950A (en) * | 1993-12-24 | 1995-07-28 | Hitachi Electron Eng Co Ltd | Method and apparatus for detecting outer peripheral defect of glass disc |
| WO2001086268A1 (en) * | 2000-05-05 | 2001-11-15 | Photon Dynamics Canada Inc. | Inspection system for edges of glass |
| US20030116727A1 (en) * | 2001-12-21 | 2003-06-26 | Burnett John B. | Automated optical inspection system with light trap |
| US6653588B1 (en) * | 1998-05-05 | 2003-11-25 | Rapiscan Security Products Limited | Auto reject unit |
| EP1617208A1 (en) * | 2004-07-13 | 2006-01-18 | Iris - Inspection Machines | Device for detecting defects of a transparent or translucent object |
| CN104646320A (en) * | 2015-02-28 | 2015-05-27 | 江苏天宏自动化科技有限公司 | Sorting system for automated logistics of aluminum alloy castings |
| CN106890796A (en) * | 2017-03-30 | 2017-06-27 | 福莱特玻璃集团股份有限公司 | Full-automatic assembly line after a kind of glass tempering |
| CN108855992A (en) * | 2018-07-12 | 2018-11-23 | 机械科学研究总院海西（福建）分院有限公司 | A kind of detection of glass and defective products rejecting mechanism |
| CN109332199A (en) * | 2018-10-16 | 2019-02-15 | 北华大学 | Refractory brick identifies and detects automatically active line |
| CN109916910A (en) * | 2019-03-27 | 2019-06-21 | 中建材凯盛机器人（上海）有限公司 | Photovoltaic glass edge fault detection system and corresponding method |
| CN210847221U (en) * | 2019-09-24 | 2020-06-26 | 安吉深华视觉科技有限公司 | Glass defect on-line measuring equipment |
-
2019
- 2019-09-24 CN CN201910905489.XA patent/CN110694922A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315654A (en) * | 1969-05-21 | 1973-05-02 | Pilkington Brothers Ltd | Detection of faults in transparent material using lasers |
| JPH07190950A (en) * | 1993-12-24 | 1995-07-28 | Hitachi Electron Eng Co Ltd | Method and apparatus for detecting outer peripheral defect of glass disc |
| US6653588B1 (en) * | 1998-05-05 | 2003-11-25 | Rapiscan Security Products Limited | Auto reject unit |
| WO2001086268A1 (en) * | 2000-05-05 | 2001-11-15 | Photon Dynamics Canada Inc. | Inspection system for edges of glass |
| US20030116727A1 (en) * | 2001-12-21 | 2003-06-26 | Burnett John B. | Automated optical inspection system with light trap |
| EP1617208A1 (en) * | 2004-07-13 | 2006-01-18 | Iris - Inspection Machines | Device for detecting defects of a transparent or translucent object |
| CN104646320A (en) * | 2015-02-28 | 2015-05-27 | 江苏天宏自动化科技有限公司 | Sorting system for automated logistics of aluminum alloy castings |
| CN106890796A (en) * | 2017-03-30 | 2017-06-27 | 福莱特玻璃集团股份有限公司 | Full-automatic assembly line after a kind of glass tempering |
| CN108855992A (en) * | 2018-07-12 | 2018-11-23 | 机械科学研究总院海西（福建）分院有限公司 | A kind of detection of glass and defective products rejecting mechanism |
| CN109332199A (en) * | 2018-10-16 | 2019-02-15 | 北华大学 | Refractory brick identifies and detects automatically active line |
| CN109916910A (en) * | 2019-03-27 | 2019-06-21 | 中建材凯盛机器人（上海）有限公司 | Photovoltaic glass edge fault detection system and corresponding method |
| CN210847221U (en) * | 2019-09-24 | 2020-06-26 | 安吉深华视觉科技有限公司 | Glass defect on-line measuring equipment |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988550A (en) * | 2019-12-17 | 2020-04-10 | 合肥诺宸智能装备有限公司 | Automatic test platform of product signal |
| CN110988550B (en) * | 2019-12-17 | 2022-04-01 | 合肥诺宸智能装备有限公司 | Automatic test platform of product signal |
| CN112665522A (en) * | 2020-10-27 | 2021-04-16 | 东莞南玻太阳能玻璃有限公司 | Device and method for monitoring online curvature of float glass in real time |
| CN113245242A (en) * | 2021-06-17 | 2021-08-13 | 苏州中科行智智能科技有限公司 | Glass slide defect detecting and sorting system |
| CN113587809A (en) * | 2021-06-28 | 2021-11-02 | 彩虹（合肥）液晶玻璃有限公司 | Automatic detection system and detection method for edge and breadth of plate glass |
| CN113834462A (en) * | 2021-08-05 | 2021-12-24 | 山西光兴光电科技有限公司 | Method and device for detecting warping of glass substrate |
| CN113945491A (en) * | 2021-09-01 | 2022-01-18 | 郑州旭飞光电科技有限公司 | Glass substrate surface particle detection system |
| CN113798200A (en) * | 2021-09-17 | 2021-12-17 | 南京孚克讯新材料有限公司 | Slide glass automatic detection platform based on visual detection and detection method thereof |
| CN114322774A (en) * | 2022-01-05 | 2022-04-12 | 河北省送变电有限公司 | Quality inspection device for angle steel production line and positioning detection method thereof |
| CN115031633A (en) * | 2022-08-11 | 2022-09-09 | 长春光华微电子设备工程中心有限公司 | On-board detection system of laser scribing machine and detection method thereof |
| CN115031633B (en) * | 2022-08-11 | 2022-11-08 | 长春光华微电子设备工程中心有限公司 | On-board detection system of laser scribing machine and detection method thereof |
| CN117571746A (en) * | 2024-01-16 | 2024-02-20 | 深圳市中研创科技有限公司 | Glass defect visual detection device and detection method thereof |
| CN117571746B (en) * | 2024-01-16 | 2024-04-05 | 深圳市中研创科技有限公司 | Glass defect visual detection device and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110694922A (en) | Glass defect on-line measuring equipment | |
| EP2895847B1 (en) | Detection system based on modulation of line structured laser image of glass | |
| CN107607549B (en) | Glass defect detection device | |
| KR101080216B1 (en) | Apparatus for inspecting glass edge and method for inspecting glass edge using thereof | |
| US20110136265A1 (en) | Method of Manufacturing Thin-Film Solar Panel and Laser Scribing Apparatus | |
| US6501546B1 (en) | Inspection system for edges of glass | |
| CN109596633B (en) | Light guide plate defect detection equipment and detection method | |
| CN102419334A (en) | Device and method capable of simultaneously detecting flatness and cleanliness of plane mirror | |
| CN210847221U (en) | Glass defect on-line measuring equipment | |
| CN211148402U (en) | Shading glue size and appearance double-station detection machine | |
| CN113245242A (en) | Glass slide defect detecting and sorting system | |
| KR100652948B1 (en) | Method and system for measuring glass thickness of liquid crystal display | |
| CN113551606A (en) | Offline detection device for size of bottom plate of tablet personal computer | |
| CN112881411A (en) | AOI automatic optical nondestructive testing equipment | |
| TWI414384B (en) | Laser processing method, laser processing device, and manufacturing method of solar panels | |
| CN215297174U (en) | Silicon wafer detection device | |
| US20230314337A1 (en) | Methods and apparatus for inspecting a material | |
| KR100573039B1 (en) | a inspection system for machine parts | |
| KR101111065B1 (en) | Apparatus for inspecting substrate | |
| JP2012229987A (en) | Laser radar optical axis inspection method and inspection system | |
| KR20100058269A (en) | Camera module apparatus | |
| JP2012154709A (en) | Three-dimensional shape measurement device | |
| CN115015206B (en) | Glass surface cleanliness detection device and detection method based on ultraviolet fluorescence method | |
| CN211785189U (en) | Device for automatically detecting defects and stopping machine | |
| JP2011161492A (en) | Apparatus and method for inspecting laser beam-machined condition and apparatus and method for laser beam machining, and method of manufacturing solar panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |