WO2012042582A1 - ガラスびん検査装置 - Google Patents
ガラスびん検査装置 Download PDFInfo
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- WO2012042582A1 WO2012042582A1 PCT/JP2010/066644 JP2010066644W WO2012042582A1 WO 2012042582 A1 WO2012042582 A1 WO 2012042582A1 JP 2010066644 W JP2010066644 W JP 2010066644W WO 2012042582 A1 WO2012042582 A1 WO 2012042582A1
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- 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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- 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 an inspection technique for the top surface of the glass bottle opening, and particularly to a technique for performing an inspection of the inclination (top inclination) of the top of the glass bottle opening at a 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 devices continuously take images (still images) of the mouth part rotated by the photographing means, detect two points on the top surface of the mouth from each photographed image, and detect between the two points. The difference in the vertical direction is calculated, and the difference is regarded as the sky tilt.
- the impact may cause the bottle to stagger and tilt. Detecting the inclination of the top of the bottle in a tilted state does not mean that the correct inclination of the top has been inspected. Therefore, the conventional ceiling inclination measuring apparatus has a problem in accuracy.
- the object of the present invention is to make it possible to accurately inspect the top tilt even when the bottle fluctuates and tilts when the bottle is rotated on the inspection table.
- the present invention comprises a rotating means for rotating the glass bottle around the bottle axis; Mouth light irradiation means for irradiating light to the bottle mouth of the glass bottle, Mouth photographing means for photographing the mouth port irradiated with light by the mouth light irradiating means, Hem light irradiation means for irradiating light to the hem of the glass bottle; A skirt photographing means for photographing a skirt irradiated with light by the skirt light irradiation means; Two points G and H on the top of the bottle mouth are detected from the mouth image photographed by the mouth photographing means, At the same time, two points M and N at the bottom of the bottle are detected from the skirt image taken by the skirt photographing means,
- the glass bottle inspection apparatus is characterized in that the top inclination when the bottle is in a vertical state is calculated from the two points G and H of the mouth and the two points M and N of the skirt.
- the inclination of the bottle itself By detecting the two points M and N at the lower end, the inclination of the bottle itself can be known, and the inclination of the bottle itself can be determined from the inclination of the top of the bottle obtained by the two points G and H on the top of the bottle mouth. By canceling out, it is possible to obtain a ceiling inclination when the bottle is in a vertical state.
- a specific method for calculating the top inclination when the bottle is in a vertical state from the two points G and H at the mouth and the two points M and N at the bottom is, for example, two points G and H on the top of the bottle mouth.
- the coordinates of (Gx, GY), (Hx, Hy) and the coordinates of the two points M, N at the lower end of the bottle are (Mx, My), (Nx, Ny)
- (Gy ⁇ Hy) is the vertical distance between the two points G and H of the mouth
- (My ⁇ Ny) is the vertical distance between the two lower points M and N
- (Gx ⁇ Hx) is the distance between the two points G and H of the mouth.
- the horizontal distance, (Mx ⁇ Nx), is the horizontal distance between the lower two points M and N.
- the glass bottle inspection apparatus can calculate an accurate sky inclination when the bottle is in a vertical state even when the bottle is in a state of being fluctuated on the inspection table, so that an accurate inspection is possible.
- FIG. 1 is a diagram showing a schematic configuration of a glass bottle inspection apparatus 1 according to the present embodiment.
- the glass bottle 8 is guided on the inspection table 7 by guide means (not shown), and rotated on the inspection table 7 with the bottle axis as a rotation axis by rotation means (not shown).
- the bottle guiding means and the bottle rotating means well-known means as described in Patent Documents 1 and 2 can be adopted.
- the mouth photographing means 2 and the mouth light irradiating means 3 are arranged opposite to each other with the mouth part 8a of the glass bottle 3 interposed therebetween, and the skirt photographing means 4 and the skirt light irradiating means 5 are opposed to each other with the hem part 8b of the glass bottle interposed therebetween.
- the photographing means 2 and 4 can be, for example, high-speed area sensor cameras equipped with a telecentric lens whose image magnification does not change.
- the light irradiation means 3 and 5 can be, for example, a diffusing surface light source configured by arranging blue LEDs that irradiate blue light in a matrix.
- the mouth light irradiation means and the skirt light irradiation means may be combined with one large light irradiation means.
- the optical axis of the mouth photographing means 2 is tilted upward by an angle ⁇ from the horizontal, and the bottle mouth 8a 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.
- the optical axis of the skirt photographing means 4 is inclined upward by an angle ⁇ from the horizontal, and the bottle hem 8b is photographed from a slightly lower side. This prevents the edge of the bottle hem portion on the back side from being photographed from the photographing means.
- Both ⁇ and ⁇ are suitably about 1 ° to 3 °.
- the images (still images) photographed by the photographing means 2 and 4 are sent to the image processing means 6 to calculate the top inclination and determine whether the glass bottle is good or bad.
- the image processing means 6 can be a personal computer with a monitor attached. Necessary information such as images taken by the photographing means 2 and 4 and the calculated sky inclination can be displayed on the monitor.
- Photographing is performed, for example, 24 times (15 ° interval) during one rotation of the glass bottle, and the mouth and the skirt are photographed simultaneously, and the top inclination is calculated from the mouth image and the skirt image photographed at the same time. be able to.
- the image processing unit executes the following image processing every time the mouth image and the skirt image captured simultaneously by the imaging units 2 and 4 are captured.
- FIG. 2 is a diagram schematically showing a mouth image obtained by photographing the mouth portion 8 a of the glass bottle by the mouth photographing means 2. 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 image processing means 6 captures one mouth image, the image processing means 6 detects an intersection A between the vertical line a set at an arbitrary X coordinate position near the center axis of the bottle and the bottle mouth 8a.
- the points E and F shifted from the intersections C and D by the predetermined distance along the X axis in the inner direction of the bottle mouth are determined, and the intersections of the vertical lines c and d passing through the points E and F and the top of the mouth are determined. G and H are obtained. By doing in this way, the measurement points G and H of the top of the top of the bottle mouth can always be at the same position.
- FIG. 3 is a diagram schematically showing a hem image obtained by photographing the hem 8b of the glass bottle by the hem photographing means 4. As shown in FIG. Since the glass bottle skirt 8b and the inspection table 7 are dark and the background is brightly displayed, the following image processing can be easily performed by binarizing the image.
- the image processing means 6 applies the intersection I between the horizontal line e set at an arbitrary Y coordinate position slightly above the upper surface of the examination table 7 and the both ends of the bottle hem 8b with respect to the hem image taken simultaneously with the mouth image.
- J are detected.
- points K and L shifted from the intersections I and J along the X axis by a predetermined distance toward the inside of the bottle skirt are determined, and the intersections M between the vertical lines f and g passing through the points K and L and the bottom of the skirt are determined.
- N For example, when there is no bright part on the line g (when the point N is in contact with the inspection table 7), the position of the upper surface of the inspection table is set as the point N. By doing in this way, the measurement points M and N of a bottle skirt inclination can always be made into the same position.
- FIG. 4 is an explanatory diagram of a method for calculating the top inclination.
- the line connecting the two measurement points G and H at the mouth is inclined, and the difference in the vertical direction is (Gy ⁇ Hy).
- This tilt includes the top tilt and the tilt of the bottle itself.
- the line connecting the two measurement points M and N at the bottom of the bottle is also inclined, and this inclination corresponds to the inclination of the bottle itself.
- the image processing means 6 can determine the quality of the glass bottle based on the calculated ceiling inclination. There are various methods for determining pass / fail. For example, when the mouth and hem are photographed 24 times (15 ° intervals) while one glass bottle makes one rotation, the 24-time ceiling inclination is calculated. If the sum of the calculated amounts of ceiling inclination is greater than a predetermined threshold value, the bottle can be determined to be defective. In addition, when the maximum value of the ceiling inclinations calculated 24 times per bottle is larger than a predetermined threshold value, the bottle can be determined to be defective, and otherwise, the bottle can be determined to be non-defective.
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- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- 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)
- Image Analysis (AREA)
Abstract
Description
ガラスびんのびん口に光を照射する口部光照射手段と、
前記口部光照射手段により光が照射されているびん口を撮影する口部撮影手段と、
ガラスびんの裾部に光を照射する裾部光照射手段と、
前記裾部光照射手段により光が照射されている裾部を撮影する裾部撮影手段を有し、
前記口部撮影手段で撮影した口部画像からびん口天面上の2点G,Hを検出し、
これと同時に前記裾部撮影手段で撮影した裾部画像からびん下端の2点M,Nを検出し、
前記口部の2点G,Hと、前記裾部の2点M,Nからびんが垂直状態のときの天傾斜を算出することを特徴とするガラスびん検査装置である。
天傾斜=|(Gy-Hy)-(My-Ny)*(Gx-Hx)/(Mx-Nx)|
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8は図示しない案内手段によって、検査台7の上に案内され、図示しない回転手段によって検査台7の上でびん軸を回転軸として回転される。
びんの案内手段、及びびんの回転手段は、前記特許文献1,2に記載されているような周知の手段を採用できる。
前記撮影手段2,4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。前記光照射手段3,5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。なお、口部光照射手段と裾部光照射手段とは、大型の一つの光照射手段で兼用してもよい。
裾部撮影手段4の光軸は水平よりも角度βだけ上方に傾けられており、びん裾部8bをやや下側から撮影するようになっている。これにより、撮影手段からみて奥側のびん裾部の縁が撮影されてしまうのを防止する。
α及びβは、共に1°~3°程度が適当である。
画像処理手段は、撮影手段2,4で同時に撮影された口部画像と裾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は、口部撮影手段2によりガラスびんの口部8aを撮影した口部画像を模式的に示す図である。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。
画像処理手段6は1枚の口部画像を取り込むと、びんの中心軸付近の任意のX座標位置に設定した垂直線aとびん口部8aの交点Aを検出する。次いで、交点Aから下方にY軸に沿って所定距離(ねじが邪魔にならない距離)だけずらした点Bを決定し、この点Bを通る水平線bとびん口部8aの両端の交点C,Dを求める。
このようにすることで、びん口部天面傾斜の測定ポイントG,Hを常に同じ位置にすることができる。
図3は、裾部撮影手段4によりガラスびんの裾部8bを撮影した裾部画像を模式的に示す図である。ガラスびんの裾部8b及び検査台7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I,JからX軸に沿って所定距離だけびん裾部の内側方向にずらした点K,Lを決定し、点K,Lを通る垂直線f,gと裾部下端の交点M,Nを求める。なお、例えば線g上において明るい部分が存在しない場合(点Nが検査台7に接触している場合)は、検査台の上面の位置を点Nとする。
このようにすることで、びん裾部傾斜の測定ポイントM,Nを常に同じ位置にすることができる。
図4は天傾斜の算出方法の説明図である。
びん口部の2点の測定ポイントG,Hを結ぶ線は傾いていて、その垂直方向の差は(Gy-Hy)である。この傾きには、天傾斜とびん自体の傾きが含まれている。
びん裾部の2点の測定ポイントM,Nを結ぶ線も傾いていて、この傾きがびん自体の傾きに相当する。びんの傾き(裾部の傾き)が口部天面の傾きに影響している垂直方向の量は、(My-Ny)(Gx-Hx)/(Mx-Nx)であるから、びん口部2点の垂直方向の差(Gy-Hy)から(My-Ny)(Gx-Hx)/(Mx-Nx)を減じることで、びんが垂直に立っているときのびん口2点の垂直方向の差(=天傾斜)を得ることができる。なお、この式では結果がマイナスになることもあるので、絶対値をとる。
ここで求めた天傾斜の単位は画素数であるから、mmに換算することを希望する場合には、1画素の長さ(mm)を掛ければよい。
画像処理手段6は、算出した天傾斜に基づいてガラスびんの良否判定を行うようにすることができる。
良否判定には種々の方法があるが、例えば、1つのガラスびんが1回転する間に24回(15°間隔)で口部及び裾部を撮影した場合、24回天傾斜が算出される。これら算出された天傾斜の量の総和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ができる。
また、1本のびんで24回算出された天傾斜のうちの最大値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 口部撮影手段
3 口部光照射手段
4 裾部撮影手段
5 裾部光照射手段
6 画像処理手段
7 検査台
8 ガラスびん
8a 口部
8b 裾部
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に光を照射する口部光照射手段と、
前記口部光照射手段により光が照射されているびん口を撮影する口部撮影手段と、
ガラスびんの裾部に光を照射する裾部光照射手段と、
前記裾部光照射手段により光が照射されている裾部を撮影する裾部撮影手段を有し、
前記口部撮影手段で撮影した口部画像からびん口天面上の2点G,Hを検出し、
これと同時に前記裾部撮影手段で撮影した裾部画像からびん下端の2点M,Nを検出し、
前記口部の2点G,Hと、前記裾部の2点M,Nからびんが垂直状態のときの天傾斜を算出することを特徴とするガラスびん検査装置。 - 前記びん口部天面上の2点G,Hの座標を(Gx,Gy),(Hx,Hy)とし、前記びん下端の2点M,Nの座標を(Mx,My),(Nx,Ny)としたときに、びんが垂直状態のときの天傾斜を次式によって求める請求項1に記載のガラスびん検査装置。
天傾斜=|(Gy-Hy)-(My-Ny)(Gx-Hx)/(Mx-Nx)|
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080068397.8A CN103119395B (zh) | 2010-09-27 | 2010-09-27 | 玻璃瓶检查装置 |
PCT/JP2010/066644 WO2012042582A1 (ja) | 2010-09-27 | 2010-09-27 | ガラスびん検査装置 |
KR1020137000747A KR101440302B1 (ko) | 2010-09-27 | 2010-09-27 | 유리병 검사장치 |
JP2010546138A JP5294427B2 (ja) | 2010-09-27 | 2010-09-27 | ガラスびん検査装置 |
EP10857798.2A EP2584307B1 (en) | 2010-09-27 | 2010-09-27 | Glass bottle inspection device |
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PCT/JP2010/066644 WO2012042582A1 (ja) | 2010-09-27 | 2010-09-27 | ガラスびん検査装置 |
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EP (1) | EP2584307B1 (ja) |
JP (1) | JP5294427B2 (ja) |
KR (1) | KR101440302B1 (ja) |
CN (1) | CN103119395B (ja) |
WO (1) | WO2012042582A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014096680A1 (fr) | 2012-12-20 | 2014-06-26 | Msc & Sgcc | Procede et dispositif de mesure de la verticalite sur un recipient |
WO2017068295A1 (fr) | 2015-10-21 | 2017-04-27 | Tiama | Procede et installation pour assurer l'inspection optique de recipients selon leur profil incluant le fond |
JP2020085818A (ja) * | 2018-11-30 | 2020-06-04 | キョーラク株式会社 | 容器の検査方法 |
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CN105241888B (zh) * | 2015-09-25 | 2018-11-02 | 上海金啤包装检测科技有限公司 | 一种瓶口缺陷的检测方法及检测装置 |
CN106382907A (zh) * | 2016-09-29 | 2017-02-08 | 南京林业大学 | 一种地板生产线的板材倾斜检测方法 |
JP7192682B2 (ja) * | 2019-07-03 | 2022-12-20 | 株式会社ダイフク | 検査システム |
CN116147539B (zh) * | 2023-03-31 | 2023-10-17 | 山东曦伴机电技术服务有限公司 | 一种新型气瓶直线度的测量方法及装置 |
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2010
- 2010-09-27 WO PCT/JP2010/066644 patent/WO2012042582A1/ja active Application Filing
- 2010-09-27 KR KR1020137000747A patent/KR101440302B1/ko active IP Right Grant
- 2010-09-27 EP EP10857798.2A patent/EP2584307B1/en active Active
- 2010-09-27 CN CN201080068397.8A patent/CN103119395B/zh not_active Expired - Fee Related
- 2010-09-27 JP JP2010546138A patent/JP5294427B2/ja active Active
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JPH09178448A (ja) * | 1995-12-27 | 1997-07-11 | Toyo Glass Co Ltd | ガラスびんの天傾斜検査装置 |
JP2007240468A (ja) * | 2006-03-13 | 2007-09-20 | Toyo Glass Co Ltd | ガラス瓶検査装置 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014096680A1 (fr) | 2012-12-20 | 2014-06-26 | Msc & Sgcc | Procede et dispositif de mesure de la verticalite sur un recipient |
US9424483B2 (en) | 2012-12-20 | 2016-08-23 | Msc & Sgcc | Method and device for measuring the verticality of a container |
WO2017068295A1 (fr) | 2015-10-21 | 2017-04-27 | Tiama | Procede et installation pour assurer l'inspection optique de recipients selon leur profil incluant le fond |
US10845316B2 (en) | 2015-10-21 | 2020-11-24 | Tiama | Method and apparatus for optically inspecting the profile of containers, the profile including the bottom |
JP2020085818A (ja) * | 2018-11-30 | 2020-06-04 | キョーラク株式会社 | 容器の検査方法 |
JP7185819B2 (ja) | 2018-11-30 | 2022-12-08 | キョーラク株式会社 | 容器の検査方法 |
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JPWO2012042582A1 (ja) | 2014-02-03 |
EP2584307A4 (en) | 2017-11-15 |
KR101440302B1 (ko) | 2014-09-15 |
KR20130031330A (ko) | 2013-03-28 |
EP2584307A1 (en) | 2013-04-24 |
JP5294427B2 (ja) | 2013-09-18 |
CN103119395A (zh) | 2013-05-22 |
EP2584307B1 (en) | 2021-03-03 |
CN103119395B (zh) | 2016-05-11 |
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