WO2012042583A1 - ガラスびん検査装置 - Google Patents
ガラスびん検査装置 Download PDFInfo
- Publication number
- WO2012042583A1 WO2012042583A1 PCT/JP2010/066645 JP2010066645W WO2012042583A1 WO 2012042583 A1 WO2012042583 A1 WO 2012042583A1 JP 2010066645 W JP2010066645 W JP 2010066645W WO 2012042583 A1 WO2012042583 A1 WO 2012042583A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mouth
- glass bottle
- point
- bottle
- line segment
- 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
- G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
-
- 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
- G01N21/84—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
- G01N21/9054—Inspection of sealing surface and container finish
Definitions
- the present invention relates to a technique for inspecting the top surface of the glass bottle mouth, and particularly to a technique for inspecting a wavy dent (heaven wave) on the top of the glass bottle mouth at high speed.
- a glass bottle manufactured by a bottle making machine is guided to a glass bottle inspection device, and the glass bottle inspection device is inspected for the presence or absence of a defect. Eliminated as a defective product.
- a glass bottle inspection device an inspection device that inspects the inclination of the top of the bottle mouth (hereinafter referred to as “top inclination”) is known, and a glass bottle with a large ceiling inclination is known in the glass bottle inspection device. By eliminating this, liquid leakage of contents and troubles during capping can be prevented in advance.
- the inclining inspection apparatus is disclosed in Patent Documents 1 and 2 below, for example. These inspection apparatuses continuously take images (still images) of the bottle mouth portion rotated by the photographing means, detect two points on the top surface of the bottle mouth portion from each of the photographed images, and between the two points. The difference in the vertical direction is calculated, and the difference is regarded as the sky tilt.
- the ceiling tilt is a defect that the almost entire surface of the top of the bottle mouth is tilted, and can be detected by the technique disclosed in the patent document.
- the disadvantage of the top surface of the bottle mouth that causes troubles at the time of liquid leakage and capping of the contents is a so-called sky wave in which a part of the top surface is undulated in the side shape of the bottle mouth. .
- the inspection apparatuses disclosed in Patent Documents 1 and 2 have a problem that the defects of celestial waves are often overlooked.
- An object of the present invention is to make it possible to detect a defect of a celestial wave with high accuracy by using the inspection apparatus disclosed in Patent Documents 1 and 2.
- the present invention comprises a rotating means for rotating the glass bottle around the bottle axis; A light irradiating means for irradiating light to the bottle mouth of the glass bottle; Photographing means for photographing the mouth portion irradiated with light by the light irradiation means; Image processing means for detecting celestial waves from the mouth image photographed by the photographing means, The image processing means detects two points A and B on the top of the bottle mouth from the mouth image photographed by the photographing means, obtains a line segment c having AB as both ends, and an arbitrary middle of the line segment c The intersection D between the vertical line d passing through the point C and the top of the mouth is obtained, the difference T between the intersection D and the intermediate point C is calculated, and the quality of the glass bottle is determined based on the value of T.
- This is a glass bottle inspection device.
- the difference between the midpoint C of the line segment c and the intersection D of the vertical line d passing through C and the top of the bottle mouth becomes large.
- the difference T between the CDs is calculated, and if T is within a predetermined range, it can be determined that the product is non-defective, and if it is not, it is determined that the product is defective.
- the midpoint C of the line segment c is preferably the midpoint of the line segment c.
- T Dy ⁇ (Ay + By) / 2
- T (Ay + By) / 2 ⁇ Dy T
- the glass bottle inspection apparatus can detect a defect of the sky tilt with high accuracy only by adding an algorithm for detecting a sky wave to the image processing means using a conventional device for measuring the sky tilt.
- FIG. 1 is a diagram showing a schematic configuration of a glass bottle inspection apparatus 1 according to the present embodiment.
- the glass bottle 6 is guided on the inspection table 5 by guide means (not shown), and is rotated on the inspection table 5 around the bottle axis by the rotation means (not shown).
- the photographing means 2 and the light irradiation means 3 are arranged opposite to each other with the mouth portion 61 of the glass bottle 6 interposed therebetween.
- the photographing means 2 can be, for example, a high-speed area sensor camera equipped with a telecentric lens whose image magnification does not change.
- the light irradiation means 3 can be, for example, a diffusion surface light source configured by arranging blue LEDs that emit blue light in a matrix.
- the optical axis of the photographing means 2 is inclined upward by an angle ⁇ with respect to the horizontal, so that the bottle opening 61 is photographed from a slightly lower side. Thereby, it is prevented that the edge of the bottle mouth portion on the back side is photographed as viewed from the photographing means.
- ⁇ is suitably about 1 ° to 3 °.
- the equipment (hardware) configuration of the inspection apparatus 1 may be the same as the inspection apparatus described in Patent Documents 1 and 2.
- the image (still image) photographed by the photographing means 2 is sent to the image processing means 4, and detection of celestial waves and quality determination of the glass bottle are performed.
- the image processing means 4 can be a personal computer with a monitor attached. Necessary information such as an image photographed by the photographing means 2 and a detected celestial wave (T value) can be displayed on the monitor.
- photographing is performed 24 times (at intervals of 15 °) during one rotation of the glass bottle so that detection of celestial waves is performed for each image of 24 frames.
- the image processing means executes the following image processing every time the photographing means 2 captures the mouth image taken.
- FIG. 2 and 3 are diagrams schematically showing mouth images obtained by photographing the mouth portion 61 of the glass bottle by the photographing means 2.
- FIG. 2 illustrates a case where the celestial wave 7 is substantially in front of the mouth image
- FIG. 3 illustrates a case where the celestial wave 7 is at the right end of the mouth image. Since the mouth of the glass bottle is dark and the background is projected brightly, the following image processing can be easily performed by binarizing the image.
- the intersections A and B of the vertical lines a and b set at the X coordinate positions slightly inside the left and right ends of the bottle mouth portion 61 and the top surface of the bottle mouth portion 61. Is detected.
- the X coordinate position of the vertical lines a and b may be any position slightly inside the chamfered portion 6a on the top of the mouth.
- a line segment c passing through the intersections A and B is obtained.
- the midpoint C of the line segment c is obtained, a vertical line d passing through the midpoint C is set, and the intersection D of the vertical line d and the top of the mouth 61 is obtained.
- the unit of T is a pixel.
- the image processing unit 4 determines the quality of the glass bottle based on the calculated T.
- the T range (upper limit threshold, lower limit threshold) of a good product is determined.
- the upper threshold value is 6 pixels
- the lower threshold value is -8 pixels. If the mouth is photographed 24 times (at intervals of 15 °) while one glass bottle makes one rotation, T is calculated 24 times.
- the calculated maximum value and minimum value of 24 T can be determined, and when the maximum value is 6 pixels or less and the minimum value is ⁇ 8 pixels or more, it can be determined as a non-defective product, and in other cases, it can be determined as a defective product.
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- 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)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
ガラスびんのびん口部に光を照射する光照射手段と、
前記光照射手段により光が照射されているびん口部を撮影する撮影手段と、
前記撮影手段で撮影した口部画像から天波を検出する画像処理手段を有し、
前記画像処理手段は、前記撮影手段で撮影した口部画像からびん口部天面上の2点A,Bを検出し、ABを両端とする線分cを求め、線分cの任意の中間点Cを通る垂直線dと口部天面との交点Dを求め、前記交点Dと中間点Cの差Tを算出し、Tの値に基づいてガラスびんの良否判定を行うことを特徴とするガラスびん検査装置である。
T=Dy-(Ay+By)/2
又は、
T=(Ay+By)/2-Dy
の式でTを求めることができる。
Dy-(Ay+By)/2
又は、
T=(Ay+By)/2-Dy
となる。
図1は、本実施形態に係るガラスびん検査装置1の概略構成を示す図である。この図において、ガラスびん6は図示しない案内手段によって、検査台5の上に案内され、図示しない回転手段によって検査台5の上でびん軸を回転軸として回転される。
撮影手段2は、例えば、像倍率が変化しないテレセントリックレンズが装着された高速エリアセンサカメラとすることができる。光照射手段3は、例えば、青色光を照射する青色LEDがマトリクス状に配列されて構成された拡散面光源とすることができる。
この検査装置1の機器(ハードウェア)構成は、前記特許文献1,2に記載されている検査装置と同じでよい。
画像処理手段は、撮影手段2撮影された口部画像を取り込む毎に次のような画像処理を実行する。
図2,3は、撮影手段2によりガラスびんの口部61を撮影した口部画像を模式的に示す図である。図2は天波7が口部画像のほぼ正面にある場合、図3は天波7が口部画像の右端にある場合を例示している。
ガラスびんの口部は暗く、背景は明るく写し出されるので、画像を2値化することで以下の画像処理を容易に行うことができる。
次いで、交点A,Bを通る線分cを求める。
次いで、線分cの中点Cを求め、中点Cを通る垂直線dを設定し、垂直線dと口部61天面の交点Dを求める。
図4は天波の検出方法の説明図である。
点Aの座標を(Ax,Ay)、前記点Bの座標を(Bx,By)とすると、点A、Bを結ぶ線分cの中点Cの座標は、((Ax+Bx)/2,(Ay+By)/2)である。
また、垂直線dと口部天面の交点DのY座標をDyとし、C,Dの差Tを(DのY座標-CのY座標)とすると、
T=(Ay+By)/2-Dy
となる。
ここで、Tの単位は画素である。
画像処理手段4は、算出したTに基づいてガラスびんの良否判定を行う。
良否判定には種々の方法があるが、例えば、次のように行うことができる。
先ず、良品のTの範囲(上限しきい値、下限しきい値)を定めておく。例えば上限しきい値は6画素、下限しきい値は-8画素のごとくである。
1つのガラスびんが1回転する間に24回(15°間隔で)口部を撮影した場合、24回Tが算出される。これら算出された24のTの最大値と最小値を求め、最大値が6画素以下、かつ最小値が-8画素以上の場合は良品、その他の場合は不良品と判定することができる。
すわなち、算出された24のTの全てが次式を満足していれば良品、1つでも次式を満足しないものがあれば不良品と判定することができる。
-8画素(下限しきい値)≦T≦6画素(上限しきい値)
また、例えば算出された24のTの絶対値の総和を求め、その総和Σ|T|が所定のしきい値より大きい場合そのびんは不良、そうでない場合そのびんは良品と判定することもできる。
2 撮影手段
3 光照射手段
4 画像処理手段
5 検査台
6 ガラスびん
61 口部
7 天波
Claims (2)
- ガラスびんをびん軸を中心に回転させる回転手段と、
ガラスびんのびん口部に光を照射する光照射手段と、
前記光照射手段により光が照射されているびん口部を撮影する撮影手段と、
前記撮影手段で撮影した口部画像から天波を検出する画像処理手段を有し、
前記画像処理手段は、前記撮影手段で撮影した口部画像からびん口部天面上の2点A,Bを検出し、ABを両端とする線分cを求め、線分cの任意の中間点Cを通る垂直線dと口部天面との交点Dを求め、前記交点Dと中間点Cの差Tを算出し、Tの値に基づいてガラスびんの良否判定を行うことを特徴とするガラスびん検査装置。 - 前記中間点Cが線分cの中点であり、前記点Aの座標を(Ax,Ay)、前記点Bの座標を(Bx,By)、前記点DのY座標をDyとすると、
T=Dy-(Ay+By)/2
又は
T=(Ay+By)/2-Dy
の式でTを求める請求項1に記載のガラスびん検査装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080068395.9A CN103052863B (zh) | 2010-09-27 | 2010-09-27 | 玻璃瓶检查装置 |
PCT/JP2010/066645 WO2012042583A1 (ja) | 2010-09-27 | 2010-09-27 | ガラスびん検査装置 |
EP10857799.0A EP2623928B1 (en) | 2010-09-27 | 2010-09-27 | Glass bottle inspection device |
JP2010546129A JP5509465B2 (ja) | 2010-09-27 | 2010-09-27 | ガラスびん検査装置 |
KR1020137000749A KR101440306B1 (ko) | 2010-09-27 | 2010-09-27 | 유리병 검사장치 |
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PCT/JP2010/066645 WO2012042583A1 (ja) | 2010-09-27 | 2010-09-27 | ガラスびん検査装置 |
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EP (1) | EP2623928B1 (ja) |
JP (1) | JP5509465B2 (ja) |
KR (1) | KR101440306B1 (ja) |
CN (1) | CN103052863B (ja) |
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Cited By (1)
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---|---|---|---|---|
JP2016223883A (ja) * | 2015-05-29 | 2016-12-28 | 日本電気硝子株式会社 | ガラス管の検査方法 |
Families Citing this family (3)
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CN103279979B (zh) * | 2013-05-03 | 2015-08-19 | 山东明佳包装检测科技有限公司 | 基于3d建模的近柱面瓶体标签的检测方法 |
CN104990512B (zh) * | 2015-07-20 | 2017-08-11 | 清华大学 | 透明容器瓶口螺纹缺陷检测系统及方法 |
CN108592794B (zh) * | 2018-05-25 | 2020-05-01 | 烟台南山学院 | 一种凸面上凹坑中点的识别方法 |
Citations (4)
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JPH06201612A (ja) * | 1993-01-11 | 1994-07-22 | Hitachi Eng Co Ltd | ボトルシールの外観検査方法及び装置 |
JP2006276025A (ja) * | 2006-04-27 | 2006-10-12 | Toyo Glass Co Ltd | ガラス瓶検査装置 |
JP2007240468A (ja) | 2006-03-13 | 2007-09-20 | Toyo Glass Co Ltd | ガラス瓶検査装置 |
JP2007240469A (ja) | 2006-03-13 | 2007-09-20 | Toyo Glass Co Ltd | ガラス瓶検査装置 |
Family Cites Families (3)
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---|---|---|---|---|
JPS61207952A (ja) * | 1985-03-12 | 1986-09-16 | Hajime Sangyo Kk | 透明材よりなるビンの欠陥検査方法 |
CN100458422C (zh) * | 2002-08-12 | 2009-02-04 | 广西师范大学 | 玻璃瓶罐检测方法及玻璃瓶罐检测装置 |
JP4417338B2 (ja) * | 2006-03-13 | 2010-02-17 | 株式会社スペースクリエイション | オーバーピン径計測装置 |
-
2010
- 2010-09-27 EP EP10857799.0A patent/EP2623928B1/en active Active
- 2010-09-27 JP JP2010546129A patent/JP5509465B2/ja active Active
- 2010-09-27 WO PCT/JP2010/066645 patent/WO2012042583A1/ja active Application Filing
- 2010-09-27 KR KR1020137000749A patent/KR101440306B1/ko active IP Right Grant
- 2010-09-27 CN CN201080068395.9A patent/CN103052863B/zh not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06201612A (ja) * | 1993-01-11 | 1994-07-22 | Hitachi Eng Co Ltd | ボトルシールの外観検査方法及び装置 |
JP2007240468A (ja) | 2006-03-13 | 2007-09-20 | Toyo Glass Co Ltd | ガラス瓶検査装置 |
JP2007240469A (ja) | 2006-03-13 | 2007-09-20 | Toyo Glass Co Ltd | ガラス瓶検査装置 |
JP2006276025A (ja) * | 2006-04-27 | 2006-10-12 | Toyo Glass Co Ltd | ガラス瓶検査装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016223883A (ja) * | 2015-05-29 | 2016-12-28 | 日本電気硝子株式会社 | ガラス管の検査方法 |
Also Published As
Publication number | Publication date |
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CN103052863B (zh) | 2015-06-24 |
EP2623928A1 (en) | 2013-08-07 |
EP2623928A4 (en) | 2017-11-15 |
JPWO2012042583A1 (ja) | 2014-02-03 |
CN103052863A (zh) | 2013-04-17 |
KR20130031331A (ko) | 2013-03-28 |
EP2623928B1 (en) | 2020-06-17 |
JP5509465B2 (ja) | 2014-06-04 |
KR101440306B1 (ko) | 2014-09-15 |
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