JPH08122276A - Bottle mouth top face check method - Google Patents
Bottle mouth top face check methodInfo
- Publication number
- JPH08122276A JPH08122276A JP25346294A JP25346294A JPH08122276A JP H08122276 A JPH08122276 A JP H08122276A JP 25346294 A JP25346294 A JP 25346294A JP 25346294 A JP25346294 A JP 25346294A JP H08122276 A JPH08122276 A JP H08122276A
- Authority
- JP
- Japan
- Prior art keywords
- bottle
- mouth
- light
- image sensor
- top face
- 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.)
- Withdrawn
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガラス壜等の壜の口天
面検査方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting the top surface of a bottle such as a glass bottle.
【０００２】[0002]
【従来の技術】壜の口天面に生ずる口カケ、口流れ、口
天ダレ等の欠点を光学的に検査することは従来から広く
行われている。その最も一般的な方法は、壜の上方にサ
ークル状の照明装置を設置して口天面を照射し、反射光
を２次元ＣＣＤカメラで撮像する方法である。この方法
によれば、口天面に欠点があるとその部分の画像に切れ
やかすれが生ずるため、画像処理により良否の判定が可
能である。2. Description of the Related Art Optical inspection for defects such as chipping, mouth flow, and mouth sagging on the top surface of a bottle has been widely performed. The most general method is to install a circle-shaped illumination device above the bottle, illuminate the top surface of the mouth, and image the reflected light with a two-dimensional CCD camera. According to this method, if there is a defect in the top surface of the mouth, the image of that portion will be cut or blurred, so that it is possible to determine the quality by image processing.
【０００３】ところが、この従来方法には次のような問
題があった。 壜口天面で照明光を全反射させて欠点を検出してい
るため、インスタントコーヒー壜のような広口壜では照
明装置が大型化するうえ、均等な照明が困難となる。従
って検査対象は実質的に細口壜に限定されていた。 たとえ均等照明が得られたとしても、壜の口部が偏
心していたり傾斜していると口天面を均等に照らすこと
ができずにムラを生じ、検査精度が低下する。 壜の口天面の肌が荒れていると、口天面の全周にわ
たり濃淡が現れる。逆に口天面が鏡面に近いと、照明ム
ラが正確に反射されてＣＣＤカメラに入ることとなり、
やはりムラが発生する。However, this conventional method has the following problems. Since the defect is detected by totally reflecting the illumination light on the top surface of the bottle mouth, a wide-mouth bottle such as an instant coffee bottle has a large illuminating device, and uniform illumination is difficult. Therefore, the subject to be inspected was practically limited to narrow mouth bottles. Even if uniform illumination is obtained, if the mouth of the bottle is eccentric or inclined, the top surface of the mouth cannot be evenly illuminated and unevenness occurs, and the inspection accuracy deteriorates. If the skin on the mouth of the bottle is rough, light and shade will appear over the entire circumference of the mouth. On the contrary, if the top surface of the mouth is close to the mirror surface, the uneven illumination will be reflected accurately and enter the CCD camera.
After all, unevenness occurs.
【０００４】また、２次元ＣＣＤカメラの代わりにリニ
アイメージセンサ（１次元ＣＣＤカメラ）を使用する方
法も知られているが、この場合にもカメラの画素単位で
処理する点は２次元ＣＣＤカメラと同じである。このた
め、やはり照明不均一や肌荒れによるムラと欠点とをう
まく峻別することができず、良品を不良品として排除し
てしまう無駄バネを引き起こしていた。従って現場では
肌荒れ等によるムラを除去するフィルタリング処理を行
っていたのであるが、壜の品種ごとに口天面の肌荒れ状
態が異なるため、非常に複雑な検査処理となっていた。There is also known a method of using a linear image sensor (one-dimensional CCD camera) instead of the two-dimensional CCD camera. However, in this case, the point of processing in the pixel unit of the camera is the two-dimensional CCD camera. Is the same. For this reason, the unevenness due to the uneven illumination and the rough skin and the defect cannot be well distinguished, which causes a waste spring that rejects the non-defective product as the defective product. Therefore, at the site, filtering processing was performed to remove unevenness due to rough skin, etc., but the rough surface condition of the mouth surface was different depending on the type of bottle, and this was a very complicated inspection process.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、口径の大小、偏心の有無、肌荒れの
有無等にかかわらず口天面を精度よく検査することがで
きる壜の口天面検査方法を提供することを目的とするも
のである。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and can accurately inspect the roof of the mouth regardless of the size of the caliber, the presence or absence of eccentricity, the presence or absence of rough skin, etc. The purpose is to provide a mouth top inspection method.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明の壜の口天面検査方法は、壜の径方
向に延びる直線状の光線を壜の口天面に照射してその反
射光をイメージセンサにより受光し、壜と投受光器とを
相対的に回転させることにより反射光の光エネルギを口
天面の周方向の短い区間につきイメージセンサに蓄積さ
せ、蓄積された口天の幅方向の情報を含むアナログ信号
をクロックパルスによりパルス化し、パルス化された光
量の大小により良否を判定することを特徴とするもので
ある。The method for inspecting the mouth top surface of a bottle according to the present invention, which has been made to solve the above problems, irradiates a straight ray extending in the radial direction of the bottle onto the mouth top surface of the bottle. The reflected light is received by the image sensor, and the light energy of the reflected light is accumulated in the image sensor for a short section in the circumferential direction of the mouth surface by rotating the bottle and the light receiver / receiver relatively. It is characterized in that an analog signal containing information in the width direction of the mouth is pulsed by a clock pulse, and the quality is judged by the magnitude of the pulsed light amount.
【０００７】[0007]
【作用】本発明の壜の口天面検査方法によれば、壜の径
方向に延びる直線状の光線を壜の口天面に照射してその
反射光をイメージセンサにより受光する方式を採用した
ので、口径の大小にかかわらず正確な検査が行え、また
壜の口部が偏心していても正確な検査が行える。しかも
壜と投受光器とを相対的に回転させることにより反射光
の光エネルギを口天面の周方向の短い区間につき蓄積さ
せ、イメージセンサに蓄積された口天の幅方向の情報を
もとにして良否の判定を行うので、肌荒れ等による微細
なムラは周方向に平均化され、口天の幅方向の情報のみ
を取り出すことができる。このため、肌荒れの有無等に
かかわらず壜の口天面を精度よく検査することができ
る。According to the bottle mouth top surface inspection method of the present invention, a method is adopted in which a straight ray extending in the radial direction of the bottle is radiated to the bottle mouth top surface and the reflected light is received by the image sensor. Therefore, accurate inspection can be performed regardless of the size of the caliber, and accurate inspection can be performed even if the mouth of the bottle is eccentric. Moreover, by rotating the bottle and the light emitter / receiver relatively, the light energy of the reflected light is accumulated for a short section in the circumferential direction of the mouth surface, and the information in the width direction of the mouth is stored in the image sensor. Since the pass / fail judgment is made in this manner, fine unevenness due to rough skin or the like is averaged in the circumferential direction, and only information in the width direction of the mouth can be taken out. Therefore, it is possible to accurately inspect the mouth top surface of the bottle regardless of whether the skin is rough or not.
【０００８】[0008]
【実施例】以下に本発明を図示の実施例によって更に詳
細に説明する。図１において、１は検査対象となるガラ
ス壜の口天面、２はＬＥＤ等の点滅時間を正確に制御で
きる光源、３は光源２からの光線を直線状に絞る棒状の
レンズ、４は口天面１からの反射光を集光するレンズ、
５は直線状のイメージセンサである。図示のように、光
源２及びレンズ３から構成される投光器と、レンズ４及
びイメージセンサ５から構成される受光器とは壜の中心
軸を含む平面に対してほぼ対象に配置されており、両者
がなす角度は０°〜15°とされている。The present invention will be described below in more detail with reference to the illustrated embodiments. In FIG. 1, 1 is a top surface of a glass bottle to be inspected, 2 is a light source capable of accurately controlling the blinking time of an LED or the like, 3 is a rod-shaped lens that narrows a light beam from the light source 2 into a straight line, and 4 is a mouth. A lens that collects the reflected light from the top surface 1,
Reference numeral 5 is a linear image sensor. As shown in the figure, the light projector composed of the light source 2 and the lens 3 and the light receiver composed of the lens 4 and the image sensor 5 are arranged substantially symmetrically with respect to the plane including the central axis of the bottle. The angle formed by is 0 ° to 15 °.
【０００９】本実施例においては、棒状のレンズ３によ
って直線状に絞られた点滅する光線Ｌは、壜の径方向と
一致させて口天面１に照射される。そして壜をその中心
軸の回りに自転させるか、あるいは壜を固定して投受光
器を回転させるか等の方法によって壜と投受光器とを相
対的に回転させつつイメージセンサ５によって口天面１
からの反射光を受光する。その結果、図２に拡大して示
したように口天面１の周方向の短い区間６について、イ
メージセンサ５に反射光のエネルギを蓄積させることが
できる。In the present embodiment, the blinking light beam L that is linearly focused by the rod-shaped lens 3 is applied to the mouth top surface 1 in the same radial direction as the bottle. Then, the bottle is rotated about its central axis, or the bottle is fixed and the light-emitter / receiver is rotated, and the bottle and the light-emitter / receiver are relatively rotated while the image sensor 5 is used. 1
Receives the reflected light from. As a result, as shown in the enlarged view of FIG. 2, the energy of the reflected light can be accumulated in the image sensor 5 for the short section 6 in the circumferential direction of the mouth top surface 1.
【００１０】このように本発明では壜の径方向に延びる
直線状の光線Ｌを壜の口天面１に照射してその反射光を
イメージセンサ５により受光する方式を採用したため、
直線状の光線Ｌの長さを壜の口天面１の幅よりも十分に
長くしておけば、壜口部が偏心していても支障なく検査
ができる。また壜の口径の大小にかかわらず、常に安定
した検査が可能である。As described above, in the present invention, since the linear light beam L extending in the radial direction of the bottle is applied to the mouth top surface 1 of the bottle and the reflected light is received by the image sensor 5,
If the length of the linear light beam L is made sufficiently longer than the width of the bottle top surface 1, the inspection can be performed without trouble even if the bottle mouth is eccentric. In addition, regardless of the size of the bottle, it is possible to always perform stable inspection.
【００１１】この口天面１の周方向の区間６の長さは、
例えば壜と投受光器との相対回転速度と、光源１の点滅
時間とによって決定される。例えば、光源１の点灯時間
が壜が１回転する時間の1/10であれば、区間６の周方向
の長さは口天面１の全周の1/10となる。そしてこの間、
イメージセンサ５には口天面１の幅方向（径方向）の情
報が蓄積される。例えば図２のＡに示すように口天面１
に口流れがあれば、その部分からの反射光はイメージセ
ンサ５に入らないため、Ａのような幅方向のアナログ情
報が蓄積される。The length of the section 6 in the circumferential direction of the mouth top surface 1 is
For example, it is determined by the relative rotation speed of the bottle and the light emitter / receiver and the blinking time of the light source 1. For example, if the lighting time of the light source 1 is 1/10 of the time that the bottle makes one revolution, the length of the section 6 in the circumferential direction is 1/10 of the entire circumference of the mouth top surface 1. And during this time
The image sensor 5 stores information in the width direction (radial direction) of the mouth top surface 1. For example, as shown in FIG.
If there is a mouth flow in, the reflected light from that portion does not enter the image sensor 5, so that analog information in the width direction such as A is accumulated.
【００１２】また、口天面１にＢのような肌荒れによる
濃淡があると、光線Ｌがその上を通過する瞬間にはＢの
ようなアナログ情報がイメージセンサ５に入るが、光線
Ｌが周方向に延びる区間６を通過する各瞬間のアナログ
情報はイメージセンサ５に蓄積されるため、区間６の終
わりＣには肌荒れによる濃淡は打ち消され、イメージセ
ンサ５に蓄積されたアナログ情報はＣのようになる。な
お、光源１は連続点灯状態としておき、イメージセンサ
５からの信号取り出し時間をクロックパルスにより決定
することにより、区間６の周方向の長さを決めてもよ
い。If there is a light and shade such as B on the mouth top surface 1, analog information such as B enters the image sensor 5 at the moment when the light beam L passes over it, but the light beam L goes around. Since the analog information at each moment passing through the section 6 extending in the direction is accumulated in the image sensor 5, the light and shade due to the rough skin is canceled at the end C of the section 6, and the analog information accumulated in the image sensor 5 is C. become. The light source 1 may be continuously turned on, and the length of the section 6 in the circumferential direction may be determined by determining the signal extraction time from the image sensor 5 with a clock pulse.
【００１３】図３はイメージセンサ５に蓄積されたアナ
ログ情報の信号処理回路である。この図３に示すよう
に、イメージセンサ５に蓄積されたアナログ信号は２値
化されたうえ、クロックパルスとの論理積を取ることに
よりパルス化される。そしてこのパルス数をカウントす
ることにより、良否の判定が行われる。具体的には、図
２のＡに示したような口流れがある場合にはパルス数が
減少し、口カケ、口天ダレの場合にも同様に正常品に比
較してパルス数が減少することとなる。しかし肌荒れに
よる濃淡は図２のＣのように周方向に延びる区間６の長
さを適切に設定することにより打ち消すことが可能であ
り、パルス数の減少を招かない。FIG. 3 shows a signal processing circuit for analog information stored in the image sensor 5. As shown in FIG. 3, the analog signal accumulated in the image sensor 5 is binarized and then pulsed by taking a logical product with a clock pulse. Then, the quality is determined by counting the number of pulses. Specifically, the number of pulses decreases when there is a mouth flow as shown in FIG. 2A, and the number of pulses decreases similarly to a normal product in the case of mouth chipping and mouth sagging. It will be. However, the shading due to the rough skin can be canceled by appropriately setting the length of the section 6 extending in the circumferential direction as shown in C of FIG. 2, and the number of pulses does not decrease.
【００１４】[0014]
【発明の効果】以上に説明したように、本発明の壜の口
天面検査方法によれば、口径の大小、偏心の有無、肌荒
れの有無等にかかわらず口天面を精度よく検査すること
ができるから、検査可能な品種の限定がなくなりあらゆ
る壜についての口天面検査を行うことができる。As explained above, according to the bottle mouth top inspection method of the present invention, it is possible to accurately inspect the mouth top regardless of the size of the caliber, the presence or absence of eccentricity, the presence or absence of rough skin. As a result, there is no limitation on the types of products that can be inspected, and it is possible to perform a mouth-top inspection on all bottles.
【図１】本発明の実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】本発明の要部とイメージセンサのアナログ情報
を示す説明図である。FIG. 2 is an explanatory diagram showing analog information of a main part of the present invention and an image sensor.
【図３】本発明の実施例の信号処理回路を示すブロック
図である。FIG. 3 is a block diagram showing a signal processing circuit according to an embodiment of the present invention.
１ 口天面 ２ 光源 ３ 棒状のレンズ ４ 反射光を集光するレンズ ５ イメージセンサ ６ 周方向の短い区間６ 1 mouth top surface 2 light source 3 rod-shaped lens 4 lens that collects reflected light 5 image sensor 6 short circumferential section 6
Claims (1)
口天面に照射してその反射光をイメージセンサにより受
光し、壜と投受光器とを相対的に回転させることにより
反射光の光エネルギを口天面の周方向の短い区間につき
イメージセンサに蓄積させ、蓄積された口天の幅方向の
情報を含むアナログ信号をクロックパルスによりパルス
化し、パルス化された光量の大小により良否を判定する
ことを特徴とする壜の口天面検査方法。1. A straight light beam extending in a radial direction of a bottle is applied to the top surface of the mouth of the bottle, the reflected light is received by an image sensor, and the light is reflected by relatively rotating the bottle and the light emitter / receiver. The light energy of light is accumulated in the image sensor for a short section in the circumferential direction of the mouth surface, and the accumulated analog signal containing the information in the width direction of the mouth is pulsed by a clock pulse, depending on the magnitude of the pulsed light amount. A method for inspecting the top and bottom of a bottle, which is characterized by determining pass / fail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25346294A JPH08122276A (en) | 1994-10-19 | 1994-10-19 | Bottle mouth top face check method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25346294A JPH08122276A (en) | 1994-10-19 | 1994-10-19 | Bottle mouth top face check method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08122276A true JPH08122276A (en) | 1996-05-17 |
Family
ID=17251729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25346294A Withdrawn JPH08122276A (en) | 1994-10-19 | 1994-10-19 | Bottle mouth top face check method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08122276A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11108643A (en) * | 1997-05-15 | 1999-04-23 | Owens Brockway Glass Container Inc | Method and device for inspecting sealing surface area of container |
| US6256095B1 (en) | 2000-01-21 | 2001-07-03 | Owens-Brockway Glass Container Inc. | Container sealing surface area inspection |
| CN102519972A (en) * | 2011-12-10 | 2012-06-27 | 山东明佳包装检测科技有限公司 | Detection method of PET bottle cap and liquid level |
| JP2017120188A (en) * | 2015-12-28 | 2017-07-06 | キリンテクノシステム株式会社 | Inspection device and inspection method for top surface of mouth part |
-
1994
- 1994-10-19 JP JP25346294A patent/JPH08122276A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11108643A (en) * | 1997-05-15 | 1999-04-23 | Owens Brockway Glass Container Inc | Method and device for inspecting sealing surface area of container |
| US6025909A (en) * | 1997-05-15 | 2000-02-15 | Owens-Brockway Glass Container Inc. | Container sealing surface area inspection |
| EP1635166B1 (en) * | 1997-05-15 | 2018-12-19 | Owens-Brockway Glass Container Inc. | Container sealing surface area inspection |
| US6256095B1 (en) | 2000-01-21 | 2001-07-03 | Owens-Brockway Glass Container Inc. | Container sealing surface area inspection |
| CN102519972A (en) * | 2011-12-10 | 2012-06-27 | 山东明佳包装检测科技有限公司 | Detection method of PET bottle cap and liquid level |
| JP2017120188A (en) * | 2015-12-28 | 2017-07-06 | キリンテクノシステム株式会社 | Inspection device and inspection method for top surface of mouth part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020115 |