WO2011000324A1 - 检测分离的低刚度的透明或半透明体的缺陷的设备和方法 - Google Patents
检测分离的低刚度的透明或半透明体的缺陷的设备和方法 Download PDFInfo
- Publication number
- WO2011000324A1 WO2011000324A1 PCT/CN2010/074901 CN2010074901W WO2011000324A1 WO 2011000324 A1 WO2011000324 A1 WO 2011000324A1 CN 2010074901 W CN2010074901 W CN 2010074901W WO 2011000324 A1 WO2011000324 A1 WO 2011000324A1
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- WO
- WIPO (PCT)
- Prior art keywords
- transparent
- conveyor
- rigidity
- translucent body
- image
- Prior art date
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Classifications
-
- 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
- G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
- G01N21/9009—Non-optical constructional details affecting optical inspection, e.g. cleaning mechanisms for optical parts, vibration reduction
-
- 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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
Definitions
- the present invention relates to apparatus and methods for detecting defects of separated low stiffness transparent or translucent bodies. Background technique
- Defects in transparent or translucent products include local defects such as inclusions and voids and contaminants such as dust and hair.
- the size of the defect ranges from a few tenths to several thousand microns.
- the quality control operator inspects the defects in the product by the naked eye.
- manual quality inspection and control cannot be intervened, but there is no completely automatic detection equipment, so there is no quality control in the automatic product line.
- a plurality of rollers are used to form a moving member to convey a glass as a transparent body of a separate jaw stiffness.
- a lighting component is disposed on one side of the glass and at a gap between two of the plurality of rollers and projects light onto the glass.
- An imaging array (image pickup unit) formed of a plurality of linear sensor cameras is disposed on the other side of the glass, receives light projected from the illumination member and transmitted through the glass, and generates a set of one-dimensional images.
- the image processing component reconstructs the two-dimensional image based on the set of one-dimensional images and analyzes the two-dimensional image to find defects in the glass.
- the method and apparatus disclosed in the above patent application cannot be applied to a low-rigidity transparent body because the low-rigidity transparent body has low rigidity and cannot move on these rollers.
- U.S. Patent Application No. US 2006/0203246 A1 discloses an apparatus and method for defect detection of a continuous low stiffness transparent body.
- a pair of guide rollers are used as moving parts for conveying a continuous low-rigidity transparent film as a continuous low-rigidity transparent body, wherein the continuous low-rigidity transparent film surrounds this Rotate the guide roller.
- a light source is disposed under the continuous low-rigidity transparent film and linear light is projected onto the transparent film.
- An optical receiver is disposed on the other side of the transparent film opposite the optical receiver and receives light transmitted through the transparent film to produce an image.
- the judging means determines whether or not there is a defect in the transparent film based on the generated image.
- an image capture device comprising: a first conveyor and a second conveyor for conveying a separate low-rigidity transparent or translucent body; a transparent bridge disposed at the separation Between the first conveyor and the second conveyor on a transmission path of a low-rigidity transparent or translucent body, the transparent bridge has an upper surface; and a lighting unit disposed on one side of the transparent bridge For projecting scattered light through the transparent bridge to the upper surface of the transparent bridge; and an image pickup unit disposed on the other side of the transparent bridge for low rigidity when the separation When a transparent or translucent body enters the upper surface of the transparent bridge, receiving is projected from the illumination unit and transmitted through the Separate low stiffness transparent or translucent light to form an image.
- a method for manufacturing an image capture device comprising: disposing a transparent bridge on a transport path of a separate low-rigidity transparent or translucent body, a first conveyor and a second conveyor Between the above, the transparent bridge has an upper surface, and the illumination unit is disposed at one side of the transparent bridge, wherein the illumination unit is configured to project scattered light through the transparent bridge to the transparent bridge And the image pickup unit is disposed on the other side of the transparent bridge, wherein the image pickup unit is configured to enter the transparent bridge when the separated low-rigidity transparent or translucent body
- the upper surface receives light that is projected from the illumination unit and transmitted through the separate low stiffness transparent or translucent body to form an image.
- an apparatus for detecting a defect of a separated low-rigidity transparent or translucent body comprising: a first conveyor and a second conveyor for conveying separated low-rigidity transparency Or a translucent body; a transparent bridge disposed between the first conveyor and the second conveyor on the transport path of the separate low-rigidity transparent or translucent body, the transparent bridge having an upper surface a lighting unit disposed on one side of the transparent bridge for projecting scattered light through the transparent bridge to the upper surface of the transparent bridge; an image pickup unit disposed on the transparent bridge The other side is for receiving a low stiffness transparent or projected from the illumination unit and transmitting through the separation when the separate low stiffness transparent or translucent body enters the upper surface of the transparent bridge Light of the translucent body to form an image; and an image processing unit for processing the formed image to determine whether there is a defect in the separated low-rigidity transparent or translucent body.
- a method for detecting a defect of a separated low-rigidity transparent or translucent body includes: projecting scattered light onto an upper surface of a transparent bridge; receiving transmission through the transparent portion Separate low-stiffness transparent or translucent light on the upper surface of the bridge to form an image; and processing the formed image to determine presence in the separate low-rigidity transparent or translucent body defect.
- FIG. 1 is a schematic view showing an apparatus for detecting defects of a separated low-rigidity transparent or translucent body according to an embodiment of the present invention
- FIGS. 2A and 2B are diagrams showing an example of a transmitter according to an embodiment of the present invention.
- FIG. 1 is a schematic view showing an apparatus for detecting defects of a separated low-rigidity transparent or translucent body according to an embodiment of the present invention.
- the device 10 includes an image capture device 100, an image processing unit 200, and an execution device 300.
- the image capture device 100 is for acquiring images, which include two transmitters 102 and 104, a transparent bridge 106, a lighting unit 108, and an image pickup unit 110.
- the conveyors 102 and 104 are used to convey a separate plastic sheet B1 as an example of a separate low-rigidity transparent/translucent body.
- the conveyors 102 and 104 are disposed at predetermined intervals on the conveying path of the separated plastic sheet B1.
- each of the conveyors 102 and 104 includes two rollers and an endless belt, wherein the two rollers are arranged at a predetermined interval on the conveying path of the separated plastic sheet B1 and When rotated, the endless belt rotates about the two rollers and rotates as the two rollers rotate to convey the separated plastic sheet B1 along the conveying path.
- the endless belt may be a wide endless belt or a plurality of narrow endless belts arranged at predetermined intervals, as shown in Figs.
- a transparent bridge 106 is disposed between the conveyors 102 and 104.
- the transparent bridge 106 has an upper surface T1, and after the separated plastic sheet B1 enters the upper surface T1 of the transparent bridge 106, the separated plastic sheet B1 can be smoothly moved, so that the image pickup unit 110 can obtain good image quality.
- the upper surface T1 of the transparent bridge 106 is lower than the upper surfaces S1 and S2 of the conveyors 102 and 104, and the transparent bridge 106 is adjacent to the conveyors 102 and 104 so that when the separated plastic sheet B1 enters the transparent bridge 106 from the conveyor 102, The separated plastic sheet B1 does not fall into the gap between the conveyor 102 and the transparent bridge 106, and when the separated plastic sheet B1 enters the conveyor 104 from the transparent bridge 106, the separated plastic sheet B1 is not carried by the conveyor 104.
- the side surface collides and loses smooth movement or some rotation.
- the upper surface T1 of the transparent bridge 106 is 1-3 mm lower than the upper surfaces S1 and S2 of the conveyors 102 and 104, and the gap between the transparent bridge 106 and the conveyor 102 and at the transparent bridge 106 and the conveyor 104.
- the gap between them is less than half the thickness of the separated plastic sheet B1.
- the cross section of the transparent bridge 106 parallel to the transport path of the separated plastic sheet B1 and perpendicular to the upper surface T1 of the transparent bridge 106 may be an inverted trapezoid or a rectangle, and the transparent bridge 106 may be made of PMMA (Plexiglas) ) or made of transparent materials such as glass.
- the illumination unit 108 is disposed below (lower side) of the transparent bridge 106, and diffuses light to the upper surface T1 of the transparent bridge 106 through the transparent bridge 106.
- the image pickup unit 110 is disposed above (upper side) of the transparent bridge 106 for receiving light projected by the illumination unit 108 and transmitted through the separated plastic sheet B1 to form an image.
- the image pickup unit 110 may be a linear sensor camera array.
- the image processing unit 200 is for processing an image acquired by the image pickup device 100 to judge whether or not there is a defect in the separated plastic film B1.
- the image processing unit 200 first performs an auto-threshold on the image acquired by the image acquisition device 100 to acquire two different thresholds for binarizing the acquired image. Then, the image processing unit 200 performs binarization processing on the acquired images using each of the two acquired thresholds to acquire two binarized images. Next, the image processing unit 200 detects whether the Any one of the two binarized images includes an area in which the gray level is different from the gray level of the background of the binarized image including the area, wherein, as shown in FIGS. 3A and 3B, The area may be, for example, a black dot, a black line, a white point, a white line, or the like.
- the image processing unit 200 determines the separation in the There is a defect in the plastic film B1, or if any one of the two binarized images is detected to have no gradation region whose background is different from the background of the binarized image containing the image, the image processing is performed.
- Unit 200 determines that there are no defects in the separated plastic film B1.
- the executing device 300 is for processing the separated plastic film B1 based on whether or not there is a defect in the separated plastic film B1.
- the executing device 300 includes a judging unit, a washing machine, and a moving unit.
- the determining unit is configured to determine whether the separated plastic film B1 is detected for the first time by checking whether the separated plastic film B1 is from the cleaning machine when the image processing unit 200 determines that there is a defect in the separated plastic film B1. When it is found that the separated plastic film B1 is from the cleaning machine, it is judged that the separated plastic film B1 is not detected for the first time, and when it is found that the separated plastic film B1 is not from the cleaning machine, It is judged that the separated plastic film B1 is detected for the first time.
- the cleaning machine is used to perform a cleaning operation.
- the moving unit is configured to move the separated plastic film B1 to the product line when the image processing unit 200 determines that there is no defect in the separated plastic film B1, and the determining unit determines that the separated plastic film B1 is
- the separated plastic film B1 is moved to the cleaning machine for cleaning when it is first detected, and the separated plastic film B1 is rejected when the judging unit judges that the separated plastic film B1 is not detected for the first time.
- the inclusions are the most common defects in plastic sheets, but their detection is easily disturbed by the rough surface of the plastic sheets.
- the peaks and valleys on the rough surface of the plastic sheet refract light and appear as dark particles in the original image. This dark spot will be a defect candidate and will be easily confused with the contents of the plastic sheet.
- the adverse effect caused by the rough surface of the plastic sheet is reduced.
- a defect having a size smaller than the pixel resolution is scattered and has an enlarged image, and thus can be detected.
- the device of the embodiment can detect defects that are invisible to the naked eye in the separated plastic film, and thus, by using the device of the embodiment, a high-quality separated plastic film can be obtained, which satisfies high-end users. Quality requirements.
- B1 defects account for the surface area ratio of less than 10-7 in general, and in the case where the ratio is more preferably less than 10 skilled in the art will appreciate, the value shown herein defects account for the surface area ratio is not intended to limit the reduction and The scope of protection of the present invention.
- the transparent bridge 106 is disposed such that the upper surface T1 of the transparent bridge 106 is lower than the upper surfaces S1 and S2 of the conveyors 102 and 104 and the transparent bridge 106 is adjacent to the conveyor 102 and 104, in order to achieve the following:
- the separated plastic sheet B1 enters the transparent bridge 106 from the conveyor 102, the separated plastic sheet B1 does not fall into the gap between the conveyor 102 and the transparent bridge 106, and when the separation When the plastic sheet B1 enters the conveyor 104 from the transparent bridge 106, the separated plastic sheet B1 is not collided by the side surface of the conveyor 104 and loses smooth movement or some rotation.
- the present invention is not limited to the adoption of a transparent bridge.
- the above is achieved by 106 being arranged such that the upper surface T1 of the transparent bridge 106 is lower than the upper surfaces S1 and S2 of the conveyors 102 and 104 and the transparent bridge 106 is adjacent to the conveyors 102 and 104.
- other means may be employed to achieve the above objectives.
- the upper surface T1 of the transparent bridge 106 is as high as the upper surfaces S1 and S2 of the conveyors 102 and 104, and the transparent bridge 106 need not be adjacent to the conveyors 102 and 104.
- the operator manually transfers the separated plastic sheet B1 from the conveyor 102 to the transparent bridge 106, and when the separated plastic When the sheet B1 enters the conveyor 104 from the transparent bridge 106, the operator manually transfers the separated plastic sheet B1 from the transparent bridge 106 to the conveyor 104.
- the upper surface T1 of the transparent bridge 106 is as high as the upper surfaces S1 and S2 of the conveyors 102 and 104, and the transparent bridge 106 is not required.
- the apparatus 10 includes injection means for injecting air into the gap between the conveyor 102 and the transparent bridge 106 and the gap between the conveyor 104 and the transparent bridge 106.
- the separated plastic sheet B1 Since the jetted air generates buoyancy to lift the separated plastic sheet B1, the separated plastic sheet B1 does not fall into the gap between the conveyor 102 and the transparent bridge 106 when entering the transparent bridge 106 from the conveyor 102, And when entering the conveyor 104 from the transparent bridge 106, it does not collide with the side surface of the conveyor 104 and loses smooth movement or some rotation.
- the upper surface T1 of the transparent bridge 106 is as high as the upper surfaces S1 and S2 of the conveyors 102 and 104, the transparent bridge 106 need not be adjacent to the conveyors 102 and 104, and the apparatus 10
- a first electrode plate and a second electrode plate to which a DC high voltage is applied are respectively disposed above the gap between the transmitter 102 and the transparent bridge 106 and above the gap between the conveyor 104 and the transparent bridge 106. Since the first electrode plate and the second electrode plate are applied with a DC high voltage, the separated plastic sheet B1 enters the transparent bridge 106 from the conveyor 102 and enters the conveyor 104 from the transparent bridge 106 when the separated plastic sheet B1 enters the conveyor 104.
- the portion of the sheet B1 located at the gap between the conveyor 102 and the transparent bridge 106 will generate an electrostatic force that is attracted to the first electrode plate, and the separated plastic sheet B1 is located at the conveyor 104 and the transparent bridge 106.
- the portion between the gaps will create an electrostatic force that attracts the second electrode plate so that the separated plastic sheet B1 does not fall between the conveyor 102 and the transparent bridge 106 when entering the transparent bridge 106 from the conveyor 102.
- In the gap, and when entering the conveyor 104 from the transparent bridge 106 it is not hit by the side surface of the conveyor 104 and loses smooth movement or some rotation.
- the illumination unit 108 is disposed on the lower side of the transparent bridge 106 and the image pickup unit 110 is disposed on the upper side of the transparent bridge 106
- the present invention is not limited thereto. herein.
- the illumination unit 108 may also be disposed on the upper side of the transparent bridge 106, and the image pickup unit 110 may be disposed on the lower side of the transparent bridge 106. That is, in various embodiments of the present invention, the illumination unit 108 is disposed on one side of the transparent bridge 106, and the image pickup unit 110 is disposed on the other side of the transparent bridge 106.
- the image pickup unit is a linear sensor camera array in the above embodiment, the image pickup unit of the present invention is not limited thereto. In other embodiments of the invention, the image pickup unit may also be a two-dimensional camera. It will be understood by those skilled in the art that although in the above embodiments, the separated plastic sheet B1 is taken as an example of a separate low-rigidity transparent or translucent body, the isolated low-rigidity transparent or translucent body of the present invention It is not limited to the separated plastic sheet B1.
- the image processing unit described in the above embodiments may be implemented by using software, hardware or a combination of software and hardware. It should be understood by those skilled in the art that the various embodiments of the present invention may be variously modified and changed without departing from the spirit and scope of the invention. The scope of protection is defined by the appended claims.
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- Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2012518016A JP5607734B2 (ja) | 2009-07-02 | 2010-07-02 | 離散的な低剛性の透明又は半透明体の欠陥を検査する装置及び方法 |
US13/381,422 US20120105624A1 (en) | 2009-07-02 | 2010-07-02 | Method and device for defect inspection in separated transparent and/or semi-transparent body |
EP10793618A EP2450694A1 (en) | 2009-07-02 | 2010-07-02 | Defect inspection apparatus for separated and transparent or translucent articles with low rigidity and inspection method thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN200910151376.1 | 2009-07-02 | ||
CN2009101513761A CN101936916A (zh) | 2009-07-02 | 2009-07-02 | 检测分离的低刚度的透明或半透明体的缺陷的设备和方法 |
Publications (1)
Publication Number | Publication Date |
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WO2011000324A1 true WO2011000324A1 (zh) | 2011-01-06 |
Family
ID=43390358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2010/074901 WO2011000324A1 (zh) | 2009-07-02 | 2010-07-02 | 检测分离的低刚度的透明或半透明体的缺陷的设备和方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120105624A1 (zh) |
EP (1) | EP2450694A1 (zh) |
JP (1) | JP5607734B2 (zh) |
KR (1) | KR20120094465A (zh) |
CN (1) | CN101936916A (zh) |
WO (1) | WO2011000324A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107388964A (zh) * | 2017-07-17 | 2017-11-24 | 国网重庆市电力公司电力科学研究院 | 一种电能表外露塑料件检测方法及系统 |
Families Citing this family (8)
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IL216903A (en) * | 2010-12-10 | 2016-09-29 | Advanced Vision Tech (A V T ) Ltd | Conveyor facility with imaging background surface |
CN102247952B (zh) * | 2011-04-13 | 2013-09-25 | 浙江大学 | 水果自动分级装置 |
CN102759531A (zh) * | 2012-07-25 | 2012-10-31 | 深圳市华星光电技术有限公司 | 自动光学检测装置 |
JP5984301B2 (ja) * | 2012-10-29 | 2016-09-06 | 株式会社プレックス | 布類検査装置 |
CN104165895B (zh) * | 2014-08-04 | 2016-05-25 | 于双悦 | 工业ct的3d成像系统的成像方法 |
CN106404803A (zh) * | 2016-09-09 | 2017-02-15 | 蚌埠中建材信息显示材料有限公司 | 一种超薄浮法玻璃外观质量检测方法 |
US10289930B2 (en) * | 2017-02-09 | 2019-05-14 | Glasstech, Inc. | System and associated for online measurement of the optical characteristics of a glass sheet |
KR102296418B1 (ko) * | 2020-06-22 | 2021-09-01 | (주)대호테크 | 비젼 검사장치 |
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Also Published As
Publication number | Publication date |
---|---|
JP5607734B2 (ja) | 2014-10-15 |
CN101936916A (zh) | 2011-01-05 |
US20120105624A1 (en) | 2012-05-03 |
KR20120094465A (ko) | 2012-08-24 |
EP2450694A1 (en) | 2012-05-09 |
JP2012531598A (ja) | 2012-12-10 |
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