JP2003065967A - Apparatus and method for inspecting thread part of glass bottle - Google Patents
Apparatus and method for inspecting thread part of glass bottleInfo
- Publication number
- JP2003065967A JP2003065967A JP2001252841A JP2001252841A JP2003065967A JP 2003065967 A JP2003065967 A JP 2003065967A JP 2001252841 A JP2001252841 A JP 2001252841A JP 2001252841 A JP2001252841 A JP 2001252841A JP 2003065967 A JP2003065967 A JP 2003065967A
- Authority
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- Japan
- Prior art keywords
- shadow
- bright
- defective
- length
- screw
- 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.)
- Granted
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]
【発明の属する技術分野】本発明は、ガラスびん製造工
程におけるガラスびんのねじ部検査装置及び検査方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass bottle screw inspection device and inspection method in a glass bottle manufacturing process.
【０００２】[0002]
【従来の技術】一般に、ガラスびんには、石・金属等の
異物包含、泡、汚れ付着、びり（ガラスのひび）、欠
け、シワなど多種多様な欠点が発生する可能性があり、
ガラスびんはその安全性・美観を保証するため、全数検
査を行っている。しかし、ガラスびんのねじ部はその複
雑な構造ゆえに他の部位に比べてそれら欠点の光学的検
査が困難であり、いきおい検査機の対応も遅れている。2. Description of the Related Art In general, glass bottles may suffer from various defects such as inclusion of foreign substances such as stones and metals, bubbles, stains, cracks (glass cracks), chips, and wrinkles.
All glass bottles are inspected to ensure their safety and beauty. However, due to the complicated structure of the threaded portion of the glass bottle, optical inspection of these defects is more difficult than in other parts, and the response of various inspection machines is delayed.
【０００３】ガラスびん検査工程において、検査は、ガ
ラスびんを回転させるハンドリングマシン上にて行って
いる。ハンドリングマシンは、びんを回転させながら検
査する検査ステーションを複数個もち、各検査ステーシ
ョンには、各部位毎、欠点種毎に分けられる検査機を搭
載する。In the glass bottle inspection process, the inspection is performed on a handling machine that rotates the glass bottle. The handling machine has a plurality of inspection stations for inspecting while rotating the bottle, and each inspection station is equipped with an inspection machine that is divided into each part and each defect type.
【０００４】従来、ねじ部の検査には、口部異物・汚れ
検査機や、口部びり検査機を同時に別々の検査ステーシ
ョンに搭載して使用していた。また、これら検査機では
対応の難しい欠点（シワ等）が存在するため、検査最終
工程の目視検査においてもねじ部の検査を行っていた。Conventionally, for inspecting a screw portion, a mouth foreign matter / dirt inspection machine and a mouth chatter inspection machine are mounted on different inspection stations at the same time and used. Further, since there are drawbacks (wrinkles, etc.) that are difficult to deal with with these inspection machines, the threaded portion is also inspected in the visual inspection in the final inspection step.
【０００５】[0005]
【発明が解決しようとする課題】しかし、目視検査にお
いても、ねじ部はその複雑な構造ゆえに、シワをはじめ
とする欠点の視覚的な検査は非常に困難であった。However, even in the visual inspection, the visual inspection of defects such as wrinkles is very difficult due to the complicated structure of the screw portion.
【０００６】これら欠点の対応のために、人手で定期的
なびんのサンプリングを行い、各びんのねじ部の詳細な
観察によって、欠点を発見した場合には、ロットの再検
査や型番別の製品破棄を行っていた。[0006] In order to deal with these defects, the bottles are sampled manually by hand, and when defects are found by observing the screw part of each bottle in detail, re-inspection of lots or product by model number is carried out. It was being destroyed.
【０００７】そこで、本発明の目的は、上述した従来技
術が有する課題を解消し、目視検査に頼らず、ねじ部欠
点を精度よく検出することができるガラスびんのねじ部
検査装置及び検査方法を提供することにある。Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a threaded portion inspection device and method for a glass bottle, which can detect a threaded portion defect accurately without relying on visual inspection. To provide.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の発明は、
光源と、この光源からの光の内、ガラスびんのねじ部を
透過した光を撮像する撮像手段と、この撮像手段で撮像
した明るい部分と影の部分とからなる画像を処理し、明
るい部分に現れる影の部分または影の部分に現れる明る
い部分を検出して、ねじ部に欠点ありと判別する判別処
理手段とを備えたことを特徴とする。The invention according to claim 1 is
A light source, an image pickup means for picking up the light transmitted from the screw part of the glass bottle out of the light from this light source, and an image consisting of a bright portion and a shadow portion picked up by this image pickup means are processed to obtain a bright portion. The present invention is characterized in that a determination processing unit that detects a shadow portion that appears or a bright portion that appears in the shadow portion and determines that the screw portion has a defect is provided.
【０００９】請求項２記載の発明は、請求項１記載のも
のにおいて、前記判別処理手段は２次元展開された原画
像を求め、各ライン上の明るさに所定のしきい値を設け
て２値化し、影の部分と明るい部分とを求め、影の部分
の長さは影の長さしきい値と比較し、明るい部分の長さ
は白部分の長さしきい値と比較し、その比較結果に応じ
て、ねじ部に欠点ありと判別することを特徴とする。According to a second aspect of the present invention, in the first aspect, the discrimination processing means obtains a two-dimensionally expanded original image, and a predetermined threshold value is set for the brightness on each line. The value of the shadow part and the bright part are obtained, the length of the shadow part is compared with the length threshold of the shadow, and the length of the light part is compared with the length threshold of the white part. It is characterized in that the threaded portion is determined to have a defect according to the comparison result.
【００１０】請求項３記載の発明は、請求項２記載のも
のにおいて、影の部分に明るい部分を含み、影の部分の
長さが影の長さしきい値よりも短くなって、この影の部
分が不良影と判定された場合、この不良影中の明るい部
分の両側に存在する影の部分の両隣の明るい部分の長さ
を、白部分の長さしきい値と比較し、これが白部分の長
さしきい値よりも短い場合、当該ラインを不良ラインと
判定し、この判定結果に応じて、ねじ部に欠点ありと判
別することを特徴とする。According to a third aspect of the present invention, in the second aspect, the shadow portion includes a bright portion, and the length of the shadow portion is shorter than the shadow length threshold value. If it is judged that the shadow area is a bad shadow, the lengths of the bright areas on both sides of the shadow area on both sides of the bright area in this bad shadow are compared with the length threshold of the white area. When the length is shorter than the length threshold of the portion, the line is determined to be a defective line, and it is determined that the threaded portion has a defect according to the determination result.
【００１１】請求項４記載の発明は、請求項２記載のも
のにおいて、明るい部分に影の部分を含み、明るい部分
の長さが白部分の長さしきい値よりも短くなって、この
明るい部分が不良部分と判定された場合、この不良部分
中の影の部分の両側に存在する明るい部分の両隣の影の
部分の長さを、影の長さしきい値と比較し、これが影の
長さしきい値よりも短い場合、当該ラインを不良ライン
と判定し、この判定結果に応じて、ねじ部に欠点ありと
判別することを特徴とする。According to a fourth aspect of the present invention, in the second aspect, the bright portion includes a shadow portion, and the length of the bright portion is shorter than the length threshold of the white portion. If a part is determined to be a defective part, the lengths of the shadow parts on both sides of the bright part on both sides of the shadow part in this defective part are compared with the shadow length threshold value, and this is When the length is shorter than the length threshold value, the line is determined to be a defective line, and it is determined that the threaded portion has a defect according to the determination result.
【００１２】請求項５記載の発明は、請求項３又は４記
載のものにおいて、不良ラインの数を計算し、この不良
ライン数に不良ライン数しきい値を設け、不良ライン数
が不良ライン数しきい値を超えた場合、そのびんを不良
と判断し、びんの排除信号を出力することを特徴とす
る。According to a fifth aspect of the present invention, in the third or fourth aspect, the number of defective lines is calculated, and the defective line number is set to a defective line number threshold value. When the threshold value is exceeded, the bottle is determined to be defective, and a bottle rejection signal is output.
【００１３】請求項６記載の発明は、ガラスびんのねじ
部に投光し、このねじ部を透過した光を撮像し、この撮
像した明るい部分と影の部分とからなる画像を処理し、
明るい部分に現れる影の部分または影の部分に現れる明
るい部分を検出して、ねじ部に欠点ありと判別すること
を特徴とする。According to a sixth aspect of the present invention, the light is projected onto the screw portion of the glass bottle, the light transmitted through the screw portion is imaged, and the image composed of the imaged bright portion and shadow portion is processed,
The present invention is characterized by detecting a shadow portion appearing in a bright portion or a bright portion appearing in a shadow portion and determining that the screw portion has a defect.
【００１４】[0014]
【発明の実施の形態】以下、本発明によるガラスびんの
ねじ部検査装置及び検査方法の一実施形態を添付した図
面を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a screw bottle inspection device and inspection method according to the present invention will be described below with reference to the accompanying drawings.
【００１５】図１Ａ、Ｂにおいて、１は拡散面光源を示
す。この光源１からの光はガラスびん３の口部のねじ部
５に投光され、このガラスびん３のねじ部５を透過した
光は、ガラスびん３を挟んで光源１と反対側に俯角３０
°で設置されたラインセンサカメラ（撮像手段）７によ
って撮像される。In FIGS. 1A and 1B, reference numeral 1 denotes a diffuse surface light source. The light from the light source 1 is projected onto the threaded portion 5 of the mouth of the glass bottle 3, and the light transmitted through the threaded portion 5 of the glass bottle 3 is located on the opposite side of the light source 1 with the glass bottle 3 interposed therebetween and the depression angle is 30.
An image is taken by the line sensor camera (imaging means) 7 installed at 0 °.
【００１６】この際、ラインセンサカメラ７のレンズに
は、接写リングを取り付けて、ガラスびん３のねじ部を
拡大し、びん口内側よりねじ部を撮像する。このライン
センサカメラ７を俯角３０°で設置したため、びん口内
側よりねじ部を、ぴんとぼけのない状態で撮像すること
ができる。At this time, a close-up ring is attached to the lens of the line sensor camera 7, the screw portion of the glass bottle 3 is enlarged, and the screw portion is imaged from the inside of the bottle mouth. Since the line sensor camera 7 is installed at a depression angle of 30 °, it is possible to take an image of the threaded portion from the inside of the bottle mouth without any blur.
【００１７】この撮像時に、ガラスびん３は回転装置９
によって常時回転される。この回転装置９は、ガラスび
ん３の胴部に回転部材９Ａの外周部を当接させ、この回
転部材９Ａを軸９Ｂ回りに回転させてガラスびん３を周
方向に回転させる。この構成では、既存のハンドリング
マシンで、他の検査機で使用している、既存の拡散面光
源１を有する検査ステーションを利用できる。At the time of this image pickup, the glass bottle 3 is rotated by the rotation device 9
Is always rotated by. The rotating device 9 brings the outer peripheral portion of the rotating member 9A into contact with the body of the glass bottle 3 and rotates the rotating member 9A around the shaft 9B to rotate the glass bottle 3 in the circumferential direction. With this configuration, the existing handling machine can use the inspection station having the existing diffused surface light source 1 used in other inspection machines.
【００１８】１１はラインセンサカメラ７から送られる
画像を処理し、後述のように、良品、不良品の判定を行
う判別処理手段である。Reference numeral 11 denotes a discriminating processing means for processing an image sent from the line sensor camera 7 and discriminating a non-defective product or a defective product as described later.
【００１９】図２Ａは、ガラスびん３の口部におけるね
じ部５の縦断面図である。このガラスびん３のねじ部５
は、その断面形状を見た場合、天面５Ａ側から、例えば
略鉛直領域ａ、略水平領域ｂ、略鉛直領域ｃ、略水平領
域ｄ、略鉛直領域ｅ、略水平領域ｆ、略鉛直領域ｇを順
次繰り返す。FIG. 2A is a vertical sectional view of the screw portion 5 at the mouth of the glass bottle 3. Screw part 5 of this glass bottle 3
Is, for example, a substantially vertical region a, a substantially horizontal region b, a substantially vertical region c, a substantially horizontal region d, a substantially vertical region e, a substantially horizontal region f, a substantially vertical region when viewed from the top surface 5A side. g is sequentially repeated.
【００２０】ラインセンサカメラ７は、びん１本の検査
開始から終了までの時間中に、あるスキャンレートで画
像を取り込み続ける。The line sensor camera 7 continues to capture images at a certain scan rate during the time from the start of inspection of one bottle to the end thereof.
【００２１】拡散面光源１からの光がねじ部５に投光さ
れた場合、水平面に近い角度を持って略水平領域ｂ，
ｄ，ｆに入った光は、その面で屈折して、図３に示すよ
うに、上方に大きくそれるため、ラインセンサカメラ７
に光が入らず、画像処理した場合、図２Ｂの２次元展開
画像に示すように、暗い影の部分（斜線部分）となって
現れる。これに対し、略鉛直領域ａ，ｃ，ｅ，ｇに入っ
た光は、大きく屈折せずに、ほとんどラインセンサカメ
ラ７に入るため、画像処理した場合、図２Ｂに示すよう
に、明るい部分（白い部分）となって現れる。When the light from the diffusing surface light source 1 is projected onto the screw portion 5, it has a substantially horizontal region b with an angle close to the horizontal plane.
Light entering d and f is refracted at the surface and largely deflects upward as shown in FIG.
When no light enters and image processing is performed, a dark shadow portion (hatched portion) appears as shown in the two-dimensional developed image of FIG. 2B. On the other hand, the light that has entered the substantially vertical regions a, c, e, and g hardly enters the line sensor camera 7 without being largely refracted. Therefore, when image processing is performed, as shown in FIG. It appears as a white part).
【００２２】すなわち、図２Ｂでは、図で左側がびん天
面５Ａ方向、右側がねじ部５の下部方向であって、ねじ
の輪郭が影の部分となって現れる。That is, in FIG. 2B, the left side is the bottle top surface 5A direction, the right side is the lower direction of the screw portion 5, and the outline of the screw appears as a shaded portion in FIG. 2B.
【００２３】図４は、ねじ部５の欠点を示す図である。
拡散面光源１の光がびんねじ部５の微小な凹凸、シワな
どを黒または白く浮き立たせる。異物・汚れ・びり・ね
じ欠け・泡は、その影が黒く現れる。ｋは、異物・汚れ
・泡を示し、ｌは、シワなどを示し、ｍは、びり・ねじ
欠けを示し、ｎは、シワなどを示す。具体的には、影の
部分に入った欠点ｎは、その欠点の凹凸により、屈折が
変わり、その部分だけ明るくなる。明るい部分に入った
欠点ｌは、その欠点の凹凸により、屈折が変わり、その
部分だけ暗くなる。また、明るい部分に入った欠点ｋ，
ｍが、光を遮る異物等であった場合、その部分だけ暗く
なる。これら欠点のない良品は、図２Ｂに示すように、
ｋ〜ｎのない画像になる。FIG. 4 is a diagram showing a defect of the screw portion 5.
The light of the diffusion surface light source 1 makes minute unevenness, wrinkles, etc. of the bottle screw portion 5 stand out black or white. The shadows of foreign matter, dirt, chatter, screw chips, and bubbles appear black. k indicates a foreign substance, dirt, or foam, l indicates a wrinkle, m indicates chatter or a screw chip, and n indicates a wrinkle or the like. Specifically, the defect n in the shaded part has a different refraction due to the unevenness of the defect, and only that part becomes brighter. The defect 1 entering the bright portion has its refraction changed due to the unevenness of the defect, and only that portion becomes dark. Also, the defect k that entered the bright part,
When m is a foreign substance or the like that blocks light, only that portion becomes dark. As shown in FIG. 2B, a good product without these defects is
The image has no k to n.
【００２４】本実施形態では、判別処理手段１１が２次
元展開画像にて黒い太線をなす部分の太さが、良品では
ほぼ一定であること、白い部分の横方向の長さが、良品
ではある一定以上短くならないこと、その複合関係、を
利用して判別を行う。以下に欠点検出・不良判定のアル
ゴリズムを説明する。In the present embodiment, the discrimination processing means 11 indicates that the thickness of the portion formed by the thick black line in the two-dimensional developed image is almost constant for non-defective products, and the lateral length of the white portion is non-defective product. Judgment is performed by utilizing the fact that it does not become shorter than a certain value and its complex relationship. The defect detection / defective determination algorithm will be described below.
【００２５】ここで説明する検出アルゴリズムは、黒い
影の部分に白く浮き立つ欠点が入った場合を例にして説
明する。The detection algorithm described here will be described by taking as an example a case where a defect that stands out in white is included in a black shadow portion.
【００２６】「アルゴリズム１．」図５Ａは、２次元展
開した原画像を示し、図５Ｂは、図５Ａ中の所定のライ
ンＬ上における明るさグラフを示す。図５Ｂのグラフの
明るさに、所定のしきい値Ｋを設けて２値化すると、図
５Ｃ、Ｄに示すように、処理された画像は、影の部
分、白の部分のいずれかに分類される。"Algorithm 1." FIG. 5A shows a two-dimensionally expanded original image, and FIG. 5B shows a brightness graph on a predetermined line L in FIG. 5A. When the brightness of the graph of FIG. 5B is binarized by providing a predetermined threshold value K, the processed image is classified into either a shadow part or a white part as shown in FIGS. 5C and D. To be done.
【００２７】このラインＬ上で、影の部分（明るさ０の
範囲）の長さには、所定長さ（←→）の「影の長さし
きい値」を設ける。また、このラインＬ上で、白い部
分、つまり明るい部分（明るさ最大の範囲）の長さに
は、所定長さ（←→）の「白部分の長さしきい値」を
設ける。On the line L, the length of the shadow portion (range of 0 brightness) is provided with a "shadow length threshold value" of a predetermined length (← →). On the line L, a white portion, that is, a bright portion (range of maximum brightness) is provided with a "white portion length threshold value" of a predetermined length (← →).
【００２８】「アルゴリズム２．」ラインＬ上を２値化
後、図５Ｄに示すように、影の長さ、を左から「影の
長さしきい値」と比較していくと、ある影の長さ（ここ
では左から数えて５番目の影の長さ）が、影の中に欠点
ｎ（明るい部分）を含むことにより、短くなって「影
の長さしきい値」を下回ることになる。この場合、図５
Ｄ中で、左から数えて５番目の影が「不良影」と判定さ
れる。この「不良影」は、上記欠点ｎ（明るい部分）の
両側に、「影の長さしきい値」よりも、かなり長さの
短い影の部分Ｓ１，Ｓ２を持って存在する。After binarizing the "algorithm 2." line L, the shadow length is compared with the "shadow length threshold" from the left as shown in FIG. 5D. The length (here, the length of the fifth shadow counted from the left) becomes shorter and falls below the "shadow length threshold" by including the defect n (bright part) in the shadow. become. In this case,
In D, the fifth shadow counted from the left is determined to be a "bad shadow". This "bad shadow" exists on both sides of the defect n (bright portion) with shadow portions S1 and S2 having a length considerably shorter than the "shadow length threshold".
【００２９】つぎに、影の部分Ｓ１，Ｓ２の両隣の白い
部分の長さが「白部分の長さしきい値」と比較され、
これが「白部分の長さしきい値」よりも短い場合、ラ
インＬは「不良ライン」と判定される。Next, the lengths of the white portions on both sides of the shadow portions S1 and S2 are compared with the "white portion length threshold value",
If this is shorter than the "white portion length threshold value", the line L is determined to be a "defective line".
【００３０】「アルゴリズム３．」ガラスびん３の、検
査開始から検査終了までの間に取り込んだ全てのライン
について、「アルゴリズム１．」と「アルゴリズム
２．」が繰り返され、そのびん３の「不良ライン」の数
が演算される。[Algorithm 3.] [Algorithm 1.] and [Algorithm 2.] are repeated for all the lines taken in the glass bottle 3 from the start to the end of the inspection, and the bottle 3 becomes "defective". The number of "lines" is calculated.
【００３１】「アルゴリズム４．」びんの「不良ライ
ン」数にも「不良ライン数しきい値」が設けられ、その
びん３の「不良ライン」数が「不良ライン数しきい値」
を超えた場合、そのびん３を最終的に不良と判断し、判
別処理手段１１から、例えばハンドリングマシンにびん
の排除信号が出力される。"Algorithm 4." A "defective line number threshold" is also set for the number of "bad line" of the bottle, and the number of "defective line" of the bottle 3 is "defective line number threshold".
When it exceeds the value, the bottle 3 is finally judged to be defective, and the bottlenecking signal is output from the discrimination processing means 11 to, for example, the handling machine.
【００３２】以上、黒い影の中に欠点ｎが入った場合の
画像を例にして説明したが、この検出アルゴリズムによ
って、白い部分に黒い欠点（ｋ〜ｍ）が入ったびんも不
良として検出可能である。In the above, the image in the case where the defect n is contained in the black shadow has been described as an example, but this detection algorithm can also detect a bottle having a black defect (km) in the white portion as a defect. Is.
【００３３】例えば、明るい部分に影の部分（ｋ〜ｍ）
を含み、明るい部分の長さが「白部分の長さしきい
値」よりも短くなって、この明るい部分が不良部分と判
定された場合、この不良部分中の影の部分の両側に存在
する明るい部分の両隣の影の部分の長さを、「影の長
さしきい値」と比較し、これが「影の長さしきい値」
よりも短い場合、当該ラインを不良ラインと判定し、上
記のように、この不良ラインを計算し、不良ライン数が
「不良ライン数しきい値」を超えた場合、そのびん３を
最終的に不良と判断し、判別処理手段１１から、例えば
ハンドリングマシンにびんの排除信号を出力する。For example, a bright portion and a shadow portion (km)
, And the length of the bright part is shorter than the “white part length threshold”, and this bright part is determined to be a defective part, it exists on both sides of the shadow part in this defective part. Compare the lengths of the shadows on both sides of the bright area with the "shadow length threshold" and this is the "shadow length threshold".
If it is shorter than that, the line is determined to be a defective line, this defective line is calculated as described above, and if the number of defective lines exceeds the “defective line number threshold”, the bottle 3 is finally determined. It is determined that the bottle is defective, and the discrimination processing means 11 outputs a bottle elimination signal to, for example, the handling machine.
【００３４】本実施形態では、カメラ７により取り込ま
れた全てのラインの、２値化後のラインにおいて、「
影の長さしきい値」と「白部分の長さしきい値」との
両方が採用され、比較されるため、原画像内に現れる、
欠点ｋ〜ｎの光学的、画像的乱れが精度よく検出され
る。In this embodiment, all the lines captured by the camera 7 are converted into "
Since both the "shadow length threshold" and the "white part length threshold" are adopted and compared, they appear in the original image,
The optical and image disturbances of the defects k to n are accurately detected.
【００３５】従って、その乱れの大きさを評価し、不良
判定を行うことによって、ねじ先端、ねじ終端などの画
像上不規則な部分の影響が排斥され、不良品との識別が
精度よく行われる等の効果が得られる。Therefore, by evaluating the magnitude of the disturbance and determining the defect, the influence of irregular portions on the image such as the screw tip and the screw end is rejected, and the defective product can be accurately identified. And so on.
【００３６】本実施形態では、欠点検出・不良判定アル
ゴリズムを備えることによって、複数の検査機を使用し
ても対応の難しい欠点（シワ等）の検出をきわめて精度
よく行うことができる。In the present embodiment, the defect detection / defective determination algorithm is provided, so that it is possible to detect defects (wrinkles, etc.) that are difficult to deal with even if a plurality of inspection machines are used, with extremely high accuracy.
【００３７】本検査装置によって、ガラスびんの全数検
査が可能になるため、ねじ部検査のために行っているサ
ンプリング・詳細な外観検査など、人手を要し、コスト
が大きな仕事を削減できると共に、全数検査が可能にな
るため、欠点をハンドリングマシン上で排除でき、ロッ
トの再検査や破棄という多大なロスの発生を防げるとい
う効果が得られる。Since this inspection apparatus makes it possible to inspect all glass bottles, it is possible to reduce labor, which requires a lot of labor such as sampling and detailed appearance inspection performed for screw portion inspection, and is costly. Since 100% inspection is possible, defects can be eliminated on the handling machine, and the effect of preventing a large loss such as reinspection and discarding of lots can be obtained.
【００３８】図１Ｂにおいて、拡散面光源１の横幅Ｗ
は、ラインセンサカメラ７のレンズを通した視野と同等
以上の幅があればよいが、この横幅Ｗは、大きければ大
きいほど画面が明るくなる。また、図１Ａにおいて、光
源１の縦幅Ｈは、画像の明るい部分（例えば、図２Ｂの
略鉛直領域ａ，ｃ，ｅ，ｇに相当する。）を明るく保つ
ため、少なくとも、像の範囲ｈ以上の縦幅が必要にな
る。In FIG. 1B, the lateral width W of the diffusion surface light source 1
Has a width equal to or larger than the field of view through the lens of the line sensor camera 7, but the larger the width W, the brighter the screen. In FIG. 1A, the vertical width H of the light source 1 is at least the image range h in order to keep the bright portion of the image (for example, corresponding to the substantially vertical regions a, c, e, and g in FIG. 2B) bright. The above vertical width is required.
【００３９】拡散面光源１の上側幅ｔ１及び下側幅ｔ２
は、画像の影の太さ（例えば、図２Ｂの略水平領域ｂ，
ｄ，ｆに相当する。）に関係する。The upper width t1 and the lower width t2 of the diffuse surface light source 1
Is the thickness of the shadow of the image (for example, the substantially horizontal region b in FIG. 2B,
It corresponds to d and f. ).
【００４０】上側幅ｔ１が大きいほど、ねじの下側の影
等、下に凸の部分（例えば、図２Ｂの略水平領域ｆに相
当する。）の幅が小さくなる。これに対し、下側幅ｔ２
が大きいほど、ねじの上側の影等、上に凸の部分（例え
ば、図２Ｂの略水平領域ｂ，ｄに相当する。）の幅が小
さくなる。The larger the upper width t1, the smaller the width of the downward convex portion (for example, corresponding to the substantially horizontal region f in FIG. 2B) such as the shadow on the lower side of the screw. On the other hand, the lower width t2
The larger is, the smaller the width of the upward convex portion (for example, corresponding to the substantially horizontal regions b and d in FIG. 2B) such as the upper shadow of the screw.
【００４１】これら拡散面光源１の横幅Ｗ、縦幅Ｈ、上
側幅ｔ１及び下側幅ｔ２を適宜調整することにより、び
ん表面の微少な凹凸を特徴とする様々なびん欠点や、び
ん内部の光を遮る欠点を検出することが可能になる。By appropriately adjusting the lateral width W, the vertical width H, the upper side width t1 and the lower side width t2 of the diffuse surface light source 1, various bottle defects characterized by minute unevenness on the bottle surface and the inside of the bottle can be obtained. It becomes possible to detect defects that block light.
【００４２】以上、一実施形態に基づき、本発明を説明
したが、本発明は、これに限定されるものでないことは
明らかである。The present invention has been described above based on the embodiment, but it is obvious that the present invention is not limited to this.
【００４３】例えば、ラインセンサカメラ７は鉛直方向
に配置したが、これに限定されず、拡散面光源１の横幅
Ｗ、縦幅Ｈの条件を満たせば、それを斜めに配置するこ
とは可能である。For example, the line sensor camera 7 is arranged in the vertical direction, but the invention is not limited to this. If the conditions of the width W and the height H of the diffusion surface light source 1 are satisfied, it is possible to arrange it obliquely. is there.
【００４４】[0044]
【発明の効果】本発明では、複数の検査機を使用しても
対応の難しい欠点（シワ等）の検出をきわめて精度よく
行うことができる。According to the present invention, it is possible to detect defects (wrinkles, etc.) that are difficult to deal with with a plurality of inspection machines with extremely high accuracy.
【図１】Ａは、本発明の一実施形態を示す配置構成図で
あり、Ｂは、それらを上方から見た図である。FIG. 1A is an arrangement configuration diagram showing an embodiment of the present invention, and B is a diagram of them viewed from above.
【図２】Ａは、ガラスびんの口部の縦断面図であり、Ｂ
は、画像処理した後の２次元展開画像図である。FIG. 2A is a vertical cross-sectional view of the mouth of a glass bottle, and FIG.
[Fig. 3] is a two-dimensional developed image view after image processing.
【図３】ガラスびんの口部を透過した光を、ラインセン
サカメラに取り込む状態を示す図である。FIG. 3 is a diagram showing a state in which light transmitted through a mouth of a glass bottle is taken into a line sensor camera.
【図４】欠点を含む場合の２次元展開画像図である。FIG. 4 is a two-dimensional developed image view when a defect is included.
【図５】Ａは、原画像図であり、Ｂは、その明るさグラ
フであり、Ｃは、二値化後の画像図であり、Ｄは、その
明るさグラフである。5A is an original image diagram, B is its brightness graph, C is an image diagram after binarization, and D is its brightness graph. FIG.
１ 拡散面光源 ３ ガラスびん ５ ねじ部 ５Ａ 天面 ７ ラインセンサカメラ（撮像手段） ａ，ｃ，ｅ，ｇ 略鉛直領域 ｂ，ｄ，ｆ 略水平領域 1 Diffuse surface light source 3 glass bottles 5 screw part 5A top surface 7 Line sensor camera (imaging means) a, c, e, g Substantially vertical area b, d, f Substantially horizontal area
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2F065 AA49 AA61 BB05 BB16 BB22 CC04 DD03 FF01 FF02 FF04 GG18 HH02 HH12 HH15 HH17 JJ02 JJ08 JJ25 KK01 MM04 PP13 QQ06 QQ25 RR06 SS04 UU02 UU05 2G051 AA14 AB02 CA03 CB02 DA08 DA13 EA11 EA12 EB01 ─────────────────────────────────────────────────── ─── Continued front page F term (reference) 2F065 AA49 AA61 BB05 BB16 BB22 CC04 DD03 FF01 FF02 FF04 GG18 HH02 HH12 HH15 HH17 JJ02 JJ08 JJ25 KK01 MM04 PP13 QQ06 QQ25 RR06 SS04 UU02 UU05 2G051 AA14 AB02 CA03 CB02 DA08 DA13 EA11 EA12 EB01
Claims (6)
びんのねじ部を透過した光を撮像する撮像手段と、この
撮像手段で撮像した明るい部分と影の部分とからなる画
像を処理し、明るい部分に現れる影の部分または影の部
分に現れる明るい部分を検出して、ねじ部に欠点ありと
判別する判別処理手段とを備えたことを特徴とするガラ
スびんのねじ部検査装置。1. A light source, an image pickup means for picking up light from the light source that has passed through a screw part of a glass bottle, and an image consisting of a bright portion and a shaded portion picked up by the image pickup means. An apparatus for inspecting a screw portion of a glass bottle is provided with a discrimination processing unit that detects a shadow portion appearing in a bright portion or a bright portion appearing in the shadow portion and determines that the screw portion has a defect.
画像を求め、各ライン上の明るさに所定のしきい値を設
けて２値化し、影の部分と明るい部分とを求め、影の部
分の長さは影の長さしきい値と比較し、明るい部分の長
さは白部分の長さしきい値と比較し、その比較結果に応
じて、ねじ部に欠点ありと判別することを特徴とする請
求項１記載のガラスびんのねじ部検査装置。2. The discrimination processing means obtains a two-dimensionally expanded original image, binarizes a brightness on each line by setting a predetermined threshold value, obtains a shadow portion and a bright portion, and calculates a shadow portion. The length of the part is compared with the length threshold of the shadow, the length of the bright part is compared with the length threshold of the white part, and it is determined that the screw part has a defect according to the comparison result. The threaded portion inspection device for a glass bottle according to claim 1, wherein:
の長さが影の長さしきい値よりも短くなって、この影の
部分が不良影と判定された場合、この不良影中の明るい
部分の両側に存在する影の部分の両隣の明るい部分の長
さを、白部分の長さしきい値と比較し、これが白部分の
長さしきい値よりも短い場合、当該ラインを不良ライン
と判定し、この判定結果に応じて、ねじ部に欠点ありと
判別することを特徴とする請求項２記載のガラスびんの
ねじ部検査装置。3. If the shadow portion includes a bright portion, and the length of the shadow portion is shorter than the shadow length threshold value, and the shadow portion is determined to be a defective shadow, the defective shadow is determined. Compare the length of the bright part on both sides of the shadow part on both sides of the bright part of the inside with the length threshold of the white part, and if this is shorter than the length threshold of the white part, the line concerned 3. The threaded portion inspection device for glass bottles according to claim 2, wherein the threaded portion is determined to be a defective line, and the threaded portion has a defect according to the determination result.
分の長さが白部分の長さしきい値よりも短くなって、こ
の明るい部分が不良部分と判定された場合、この不良部
分中の影の部分の両側に存在する明るい部分の両隣の影
の部分の長さを、影の長さしきい値と比較し、これが影
の長さしきい値よりも短い場合、当該ラインを不良ライ
ンと判定し、この判定結果に応じて、ねじ部に欠点あり
と判別することを特徴とする請求項２記載のガラスびん
のねじ部検査装置。4. If the bright portion includes a shadow portion, and the length of the bright portion is shorter than the length threshold of the white portion, and this bright portion is determined to be a defective portion, the The length of the shadow part on both sides of the bright part on both sides of the shadow part is compared with the shadow length threshold value, and if this is shorter than the shadow length threshold value, the line is defective. 3. The threaded portion inspection device for a glass bottle according to claim 2, wherein the threaded portion is determined to be a line, and the threaded portion is determined to have a defect according to the determination result.
ン数に不良ライン数しきい値を設け、不良ライン数が不
良ライン数しきい値を超えた場合、そのびんを不良と判
断し、びんの排除信号を出力することを特徴とする請求
項３又は４記載のガラスびんのねじ部検査装置。5. The number of defective lines is calculated, a defective line number threshold value is set for this defective line number, and when the defective line number exceeds the defective line number threshold value, the bottle is determined to be defective, The screw bottle inspection device according to claim 3 or 4, wherein a bottle exclusion signal is output.
部を透過した光を撮像し、この撮像した明るい部分と影
の部分とからなる画像を処理し、明るい部分に現れる影
の部分または影の部分に現れる明るい部分を検出して、
ねじ部に欠点ありと判別することを特徴とするガラスび
んのねじ部検査方法。6. A shadow portion appearing in a bright portion is processed by projecting light onto a screw portion of a glass bottle, capturing light transmitted through the screw portion, processing the captured image of a bright portion and a shadow portion. Or detect the bright part appearing in the shadow part,
A method for inspecting a screw portion of a glass bottle, which is characterized by determining that the screw portion has a defect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001252841A JP3682249B2 (en) | 2001-08-23 | 2001-08-23 | Glass bottle thread inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001252841A JP3682249B2 (en) | 2001-08-23 | 2001-08-23 | Glass bottle thread inspection device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005120715A Division JP4723894B2 (en) | 2005-04-19 | 2005-04-19 | Glass bottle thread inspection device and inspection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003065967A true JP2003065967A (en) | 2003-03-05 |
| JP3682249B2 JP3682249B2 (en) | 2005-08-10 |
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ID=19081249
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001252841A Expired - Fee Related JP3682249B2 (en) | 2001-08-23 | 2001-08-23 | Glass bottle thread inspection device |
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| Country | Link |
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| JP (1) | JP3682249B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015169442A (en) * | 2014-03-04 | 2015-09-28 | 東洋ガラス機械株式会社 | Opening inspection device of glass bottle |
| CN107472601A (en) * | 2017-09-01 | 2017-12-15 | 广西德保新贝侬酒厂有限公司 | A kind of alcoholic workshop lamp checking device |
-
2001
- 2001-08-23 JP JP2001252841A patent/JP3682249B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015169442A (en) * | 2014-03-04 | 2015-09-28 | 東洋ガラス機械株式会社 | Opening inspection device of glass bottle |
| CN107472601A (en) * | 2017-09-01 | 2017-12-15 | 广西德保新贝侬酒厂有限公司 | A kind of alcoholic workshop lamp checking device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3682249B2 (en) | 2005-08-10 |
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