JP3215858B2 - Article appearance inspection device - Google Patents
Article appearance inspection deviceInfo
- Publication number
- JP3215858B2 JP3215858B2 JP36957198A JP36957198A JP3215858B2 JP 3215858 B2 JP3215858 B2 JP 3215858B2 JP 36957198 A JP36957198 A JP 36957198A JP 36957198 A JP36957198 A JP 36957198A JP 3215858 B2 JP3215858 B2 JP 3215858B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- illumination
- light source
- article
- inspection
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、医薬品、食品、化
学品などや電子部品・機械部品などの物品の生産ライン
において、被検査物品の欠け、割れ、異物、例えば髪の
毛、フィルムカス、欠けカス、その他ごみ類などの付着
や混入の異物の検査をカメラにより映像を取ることで外
観検査や、欠品検査をするための搬送方式の物品外観検
査装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production line for articles such as pharmaceuticals, foods, chemicals, electronic parts and mechanical parts, and the like. Also, the present invention relates to a transport type article appearance inspection apparatus for performing an appearance inspection or a missing item inspection by taking an image of an inspection of a foreign substance such as dust attached or mixed by a camera.
【０００２】[0002]
【従来の技術】一般に、錠剤包装のＰＴＰ包装検査ライ
ンでは、アルミプレート上にＰＶＣシートを溶着して梱
包した包装品での異物の付着、異物の混入等の検査を自
動化のために画像処理装置が使用されている。その画像
処理装置は、カメラと照明により鮮明な映像を取って判
別することが知られている。そしてＰＴＰシート包装
は、中に入る錠剤等の形状に合わせた形をしており、単
純に蛍光灯、ストロボ、ハロゲン等の照明を直接照射し
てもＰＴＰフィルム表面の反射の影響を受けるので、照
明にフィルターを追加したりしてシートの反射を防いで
いるが、検査項目の錠剤の欠け、異物の付着程度に限定
されているのが現状である。2. Description of the Related Art In general, in a PTP packaging inspection line for tablet packaging, an image processing apparatus is used to automate the inspection of foreign matter adhesion and foreign matter in a packaged product obtained by welding a PVC sheet onto an aluminum plate and packing. Is used. It is known that the image processing apparatus determines a clear image by using a camera and illumination. And the PTP sheet packaging is shaped according to the shape of the tablets etc. to enter, and even if it is directly irradiated with illumination such as fluorescent light, strobe, halogen etc., it is affected by the reflection of the PTP film surface, The reflection of the sheet is prevented by adding a filter to the lighting, but at present, the inspection is limited to the degree of chipping of the tablet and the degree of adhesion of foreign matter.
【０００３】[0003]
【発明が解決しようとする課題】従来のＰＴＰ包装検査
装置の画像処理では、被検査物品を板状体に載置し静止
状態で上部から直接蛍光灯、ハロゲンやストロボ照明を
照射して検査しているバッチ方式であるので、作業性が
悪いうえに照明光が物品に当ってＰＴＰ包装の凹凸部分
に、特に物品周囲に陰や輪郭など光むらが発生する事が
問題であり、しかも錠剤部分の検出はよくても、その周
囲に混在する異物や付着物の検出がしにくい。例えば、
照明光を被写体に上方から当てると、図４（ａ）のよう
に被写体Ａの形状によっては、周囲に陰影の発生や光斑
発生の現象がでやすく異物との判別ができなくなる傾向
が強いし、また下方から光を当てると図４（ｂ）のよう
に被写体Ａの隙間は見えても被写体Ａ自体が遮光して暗
くなり被写体の外観表面が全く写せず異物検出できなく
なるほか、異物が黒色系のものしか検出できなかった
り、光斑を防ぐために偏光フィルターを通して行なうと
検出項目は限定され、包装シートの材質にも左右される
点、殊に検出不能となるか、検査精度が極端に悪化する
などの取扱い作業上にも欠点があった。本発明は、これ
ら従来の諸欠点を排除しようとするもので、錠剤や粒状
物などの被検査物品を連続的に移動させつつ被検査物品
の陰影発生や光斑発生を防ぎ、カメラの映像を鮮明にし
高い検査精度で異物や不良品を検出すると共に、流れ作
業で高能率に検査取扱いができ、生産ラインに挿入設置
しても安定した信頼性ある検査を確保し、しかも表面ば
かりでなくシール不良、シート異物をも検出し、検査項
目の拡大化と、包装品の多様化にも容易に対応できる物
品外観検査装置を提供することを目的とするものであ
る。In the image processing of a conventional PTP packaging inspection apparatus, an article to be inspected is placed on a plate-like body, and is inspected by irradiating a fluorescent light, a halogen lamp, or a strobe light directly from above on a stationary state. In addition, the batch method is not good, the workability is poor, and the illumination light shines on the article, causing uneven light such as shadows and outlines around the article, especially on the uneven part of the PTP package. Is good, but it is difficult to detect foreign substances and attached substances around the object. For example,
When exposed to illumination light from above the object, the shape of the subject A as shown in FIG. 4 (a), to a strong tendency to be unable to distinguish between easily foreign matter out phenomenon of shadow generation and light spots generated around, When light is applied from below, even if the gap between the subjects A can be seen as shown in FIG. 4B, the subject A itself is shaded and darkened, so that the exterior surface of the subject is not captured at all and foreign objects cannot be detected. Items can be detected only, or if the detection is performed through a polarizing filter to prevent light spots, the items to be detected are limited, and the point is also affected by the material of the packaging sheet, especially detection becomes impossible, or inspection accuracy is extremely deteriorated. There was also a drawback in the handling work of. The present invention is intended to eliminate these conventional drawbacks, and prevents the occurrence of shading and light spots on the inspected article while continuously moving the inspected article such as tablets and granules, and sharpens the image of the camera. In addition to detecting foreign substances and defective products with high inspection accuracy, highly efficient inspection and handling can be performed in the flow operation, ensuring stable and reliable inspection even when inserted and installed on the production line, and not only the surface but also the sealing defect It is another object of the present invention to provide an article appearance inspection apparatus capable of detecting sheet foreign matter, expanding inspection items, and easily responding to diversification of packages.
【０００４】[0004]
【課題を解決するための手段】本発明は、ストロボなど
の光源を有する照明機構と、画像処理システムに接続さ
れるカメラとからなり、前記照明機構の光源からの照明
光の照射により被検査物品の映像をカメラで取って、画
像処理する物品外観検査装置において、被検査物を載置
移送する無端状の透光性搬送ベルトと、光源と該光源を
囲むように配置され光源からの光を下方に反射させるド
ーム状反射板及び該ドーム状反射板の下面に配置され中
心透孔を有する拡散プレートとを備え前記透光性搬送ベ
ルト上に被検査物品に上方から照明光を照射する上部照
明機構と、前記透光性搬送ベルトの下方より透光性搬送
ベルトを介して被検査物品に照明光を照射する面発光照
明光源からなる下部照明機構を設けたものである。SUMMARY OF THE INVENTION The present invention comprises an illumination mechanism having a light source such as a strobe, and a camera connected to an image processing system. The object to be inspected is irradiated with illumination light from the light source of the illumination mechanism. In an article appearance inspection device that takes an image of the object with a camera and performs image processing, an endless translucent transport belt for placing and transporting the inspection object, a light source, and the light source
Domes that are arranged to surround and reflect light from the light source downward
Disposed on the lower surface of the beam-shaped reflector and the dome-shaped reflector.
A diffusion plate having a core through hole;
Top illumination that irradiates the inspection object with illumination light from above
A light emitting mechanism for illuminating an object to be inspected with illumination light from below the translucent transport belt via the translucent transport belt.
A lower illumination mechanism including a bright light source is provided.
【０００５】[0005]
【発明の実施の形態】本発明の実施形態では、被検査物
品搬送ライン上の被検査物品の上部にストロボ照明光を
照射してカメラで撮影した映像を画像処理システムで処
理し、異物混入、付着を検出して不良品或いは欠陥品の
識別が流れ作業ででき、しかも光源からの照明光を被写
体の被検査物品に上下両方から当てて陰影や光斑が発生
することなく、被検査物品間の隙間も光を受けて異物検
査が最適な映像となり、高い精度で安定した信頼性ある
検査を確保し、また物品面ばかりでなく周囲の異物をも
容易に検出し、検査項目の拡大化と、被検査物品の多様
化にも容易に対応する検査ができ各検査作業性の高能率
化をはかることができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In an embodiment of the present invention, an image processing system processes an image photographed by a camera by irradiating an upper portion of an article to be inspected on an article to be inspected with a strobe illumination light to prevent foreign matter from entering. Defective or defective products can be identified by detecting the adherence, and the illumination light from the light source is applied to the object to be inspected from both upper and lower sides without shadows or light spots. The gap also receives the light, and the foreign matter inspection becomes the optimal image, ensuring stable and reliable inspection with high accuracy.Also, it is easy to detect not only the surface of the article but also foreign matter in the surrounding area, and the inspection items are expanded, Inspections that can easily respond to diversification of inspected articles can be performed easily, and the efficiency of each inspection work can be improved.
【０００６】[0006]
【実施例】本発明の実施例を図１乃至図３の例で説明す
ると、ストロボなどの光源１と、ドーム状反射板２とか
らなる照明機構３と、画像処理システム５に接続される
カメラ４、例えばビデオカメラ或いはＣＣＤカメラとか
らなり、前記照明機構の光源１からの照明光の照射によ
り被検査物品Ａの映像をカメラ４で取って画像処理する
物品外観検査装置であって、被検査物品Ａ上に配置され
るカメラ４のレンズ４１ の直下同心円上にドーム状反
射板２を配備してある。即ち、被検査物Ａを載置移送す
る無端状の透光性搬送ベルト９と、該透光性搬送ベルト
９上の被検査物品Ａに上方から照明光を照射し、かつ被
検査物品上に配備されるカメラ４の直下同心円上にドー
ム状反射板２を備えた上部照明機構３と、前記透光性搬
送ベルト９の下方より透光性搬送ベルト９を介して被検
査物品Ａに照明光を照射する下部照明機構１０とを設け
て物品外観検査装置としてある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 3. Illumination mechanism 3 including a light source 1 such as a strobe, a dome-shaped reflector 2, and a camera connected to an image processing system 5. 4. An article appearance inspection apparatus comprising a video camera or a CCD camera, for example, taking an image of an article A to be inspected by a camera 4 by irradiating illumination light from a light source 1 of the illumination mechanism, and performing image processing, It is deployed domed reflector 2 on a concentric circle directly below the lens 4 1 of the camera 4 disposed on the article a. That is, an endless translucent transport belt 9 for placing and transporting the inspection object A, and irradiating the inspection object A on the translucent transportation belt 9 with illumination light from above, and An upper illumination mechanism 3 having a dome-shaped reflecting plate 2 on a concentric circle immediately below a camera 4 to be provided, and illumination light on the inspection object A from below the translucent transport belt 9 via the translucent transport belt 9. And a lower illumination mechanism 10 for irradiating the object.
【０００７】前記上部照明機構３としては、頂面中央で
前記カメラ４のレンズ４１ に対向部位に５０％透光性
のハーフミラー７を備えてもよく、集光性を良好として
光斑がなく被検査物品Ａの被写体全体が暗くならないで
均等に光が当るように考慮してあり、必要に応じ光源１
の下方に中心透孔１２のある拡散プレート６を備える。
また、前記光源１としては、ストロボ照明を用いてあ
るが、蛍光燈、ハロゲン灯などを用いてもよく、いずれ
にしても被写体に当る直接光は光量全体の約４０％以下
とし透過光を含む間接光を主として図２に示すように被
検査物品Ａの上部に均等に当るように反射面を配慮し、
反射板２の頂面部と光源１の配置を透孔１２との関係で
選んである。[0007] As the upper lighting mechanism 3 may comprise the camera lens 4 50% translucent half mirror 7 to the opposite site 1 of 4 at top center, there is no bright spot light condensing property as a good Consideration is given so that the entire subject of the inspected article A is evenly illuminated without darkening.
Is provided with a diffusion plate 6 having a central through hole 12 below.
Further, although the strobe lighting is used as the light source 1, a fluorescent lamp, a halogen lamp, or the like may be used. In any case, the direct light hitting the subject is set to about 40% or less of the entire light amount and includes the transmitted light. Considering the reflection surface so that the indirect light mainly hits the upper part of the inspection object A evenly as shown in FIG.
The arrangement of the top surface of the reflection plate 2 and the light source 1 is selected in relation to the through hole 12.
【０００８】なお、前記透光性搬送ベルト９は、透光率
３０〜６０％好ましくは４５〜６０％の透光性搬送ベル
トであって、無端状に動輪１３に架装されて走行するも
のを用いて流れ作業の搬送行程中に検査ができるように
してあり、供給部１４から搬入される被検出物Ａを連続
的に検査し、搬出受部１５に搬送されると共に、異物な
どは除去回収される。また、前記上下照明機構３，１０
が調光可能の光源１，１１を備えたものであって、上部
照明機構３と、下部照明機構１０との照明輝度を５０〜
７０：１００好ましくは６０〜７０：１００とし、錠剤
や粒状物体中の異物検査に対して最適状態とするのがよ
い。また、被検査物がシート包装品の場合には６０〜７
０：１００に調光するのがよいし、さらに被検査物品の
色彩、例えば黄色、ピンク色、若しくは白色、スカイブ
ルーなどの色に合わせて調光するのがよい。The translucent transport belt 9 is a translucent transport belt having a transmissivity of 30 to 60%, preferably 45 to 60%, which runs around the driving wheel 13 endlessly. Inspection can be performed during the transportation process of the assembly line by using the inspection device. The inspection object A carried in from the supply unit 14 is continuously inspected, transported to the unloading / receiving unit 15, and foreign substances are removed. Collected. Further, the upper and lower illumination mechanisms 3, 10
Are provided with dimmable light sources 1 and 11, and the illumination brightness of the upper illumination mechanism 3 and the lower illumination mechanism 10 is 50 to
70: 100, preferably 60-70: 100, which is optimal for inspection of foreign substances in tablets and granular objects. Further, when the inspection object is a sheet packaged product, 60 to 7
It is preferable to adjust the light to 0: 100, and to adjust the light according to the color of the article to be inspected, for example, yellow, pink, white, or sky blue.
【０００９】さらに、前記上部照明機構３は、リング状
蛍光管の光源を備え、面発光照明光源１１からなる下部
照明に対設してあり、頂面中央に透孔を有し、頂面から
下方に屈折する反射光が生ずるドーム状反射板２と、該
反射板内周下方にリング状蛍光管１とから構成され、前
記ドーム状反射板２は、取付枠体８で搬送ラインの透光
性ベルト９上で高速で走行される検査位置に間隔をあけ
てスタンド、その他の固定フレームに固定されて配備さ
れるが、自動搬送行程後或いは検査台上の取付場所にセ
ットとして被検査物品Ａの粒状面或いは錠面やその周囲
のシール不良、シート異物を検査するようにしてある。Further, the upper illumination mechanism 3 has a light source of a ring-shaped fluorescent tube, is provided opposite to the lower illumination composed of the surface-emitting illumination light source 11, has a through hole at the center of the top surface, and has a through hole. The dome-shaped reflector 2 includes a dome-shaped reflector 2 in which reflected light refracted downward is generated, and a ring-shaped fluorescent tube 1 below the inner periphery of the reflector. The test object A is fixed to a stand or other fixed frame at intervals at an inspection position where the inspection object A travels on the belt 9 at high speed. Inspection of a granular surface or a lock surface or a defective seal around the surface or foreign matter of a sheet is performed.
【００１０】[0010]
【発明の効果】本発明は、ストロボなどの光源を有する
照明機構と、画像処理システムに接続されるカメラとか
らなり、前記照明機構の光源からの照明光の照射により
被検査物品の映像をカメラで取って、画像処理する物品
外観検査装置において、被検査物を載置移送する無端状
の透光性搬送ベルトと、該透光性搬送ベルト上の被検査
物品に上方から照明光を照射する上部照明機構と、前記
透光性搬送ベルトの下方より透光性搬送ベルトを介して
被検査物品に照明光を照射する下部照明機構とを設けた
ことにより、被検査物品は連続的に移動させつつ光源か
らの照明光を透光性搬送ベルトを介して被検査物品の上
下両側から当てて陰影発生や光斑発生を防ぎ、カメラの
映像を鮮明にして高い検査精度で異物を検出するととも
に、無端状の透光性搬送ベルトで搬送される被検査物品
を連続的な流れ作業ラインで検出でき、生産ラインに挿
入設置して安定した信頼性ある検査ができ、取扱作業も
著しく高能率に行なえ、しかも粒状面或いは錠面ばかり
でなくその周囲の異物をも確実に精度よく検出し、検査
項目の拡大化と、包装品の多様化にも容易に対応できる
ものである。The present invention comprises an illumination mechanism having a light source such as a strobe, and a camera connected to an image processing system, and irradiates illumination light from the light source of the illumination mechanism to produce a video of an article to be inspected. In the article appearance inspection apparatus for performing image processing, an endless translucent transport belt for placing and transporting the inspection object, and irradiating the inspection object on the translucent transport belt with illumination light from above. By providing an upper illumination mechanism and a lower illumination mechanism that irradiates the inspection object with illumination light from below the translucent transport belt via the translucent transport belt, the inspected article is continuously moved. While illuminating light from a light source is applied from both the upper and lower sides of the article to be inspected via a translucent transport belt, shadows and light spots are prevented, the image from the camera is sharp, foreign objects are detected with high inspection accuracy, and endless Shaped light transmission Inspected articles conveyed by the conveyor belt can be detected on a continuous flow work line, and can be inserted and installed in a production line for stable and reliable inspection, handling can be performed with extremely high efficiency, and granular surfaces or tablets can be used. It can reliably detect not only a surface but also foreign substances around the surface with high accuracy, and can easily cope with an increase in inspection items and diversification of packaged products.
【図１】本発明の実施例を示す系統説明図である。FIG. 1 is a system explanatory diagram showing an embodiment of the present invention.
【図２】図１の例での映像状態の平面図である。FIG. 2 is a plan view of an image state in the example of FIG.
【図３】本発明で用いられる一使用状態例で、（ａ）は
その系統説明図、（ｂ）は照明機構の拡大縦断面図であ
る。FIGS. 3A and 3B are diagrams illustrating an example of a use state used in the present invention, in which FIG. 3A is an explanatory diagram of the system, and FIG.
【図４】従来例での映像状態を示し、（ａ）は照明光を
上方から当てた例、（ｂ）は照明光を下方から当てた例
の平面図である。4A and 4B show an image state in a conventional example, where FIG. 4A is a plan view of an example in which illumination light is applied from above, and FIG. 4B is a plan view of an example in which illumination light is applied from below.
Ａ 被検査物品 １ 光源 ２ ドーム状反射板 ３ 照明機構 ４ カメラ ４１ レンズ ５ 画像処理システム ６ 拡散プレート ７ ハーフミラー ８ 取付枠体 ９ 透光性搬送ベルト １０ 照明機構 １１ 光源A Inspection object 1 Light source 2 Domed reflector 3 Lighting mechanism 4 Camera 4 1 Lens 5 Image processing system 6 Diffusion plate 7 Half mirror 8 Mounting frame 9 Translucent transport belt 10 Lighting mechanism 11 Light source
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 21/84 - 21/958 B07C 5/10 B07C 5/342 G01B 11/00 - 11/30 102 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G01N 21/84-21/958 B07C 5/10 B07C 5/342 G01B 11/00-11/30 102
Claims (3)
と、画像処理システムに接続されるカメラとからなり、
前記照明機構の光源からの照明光の照射により被検査物
品の映像をカメラで取って、画像処理する物品外観検査
装置において、被検査物を載置移送する無端状の透光性
搬送ベルトと、光源と該光源を囲むように配置され光源
からの光を下方に反射させるドーム状反射板及び該ドー
ム状反射板の下面に配置され中心透孔を有する拡散プレ
ートとを備え前記透光性搬送ベルト上の被検査物品に上
方から照明光を照射する上部照明機構と、前記透光性搬
送ベルトの下方より透光性搬送ベルトを介して被検査物
品に照明光を照射する面発光照明光源からなる下部照明
機構とを設けたことを特徴とする物品外観検査装置。An illumination mechanism having a light source such as a strobe and a camera connected to an image processing system,
An image of the article to be inspected is irradiated with illumination light from the light source of the illumination mechanism with a camera, and in an article appearance inspection apparatus for performing image processing, an endless translucent transport belt for placing and transporting the inspection object, A light source and a light source arranged to surround the light source
Dome-shaped reflector for reflecting light from
Diffuser with a central through hole
A sheet to be inspected on the translucent conveying belt.
An upper illumination mechanism that irradiates illumination light from the side, and a lower illumination mechanism that includes a surface-emitting illumination light source that irradiates illumination light to the article to be inspected from below the translucent transport belt via the translucent transport belt is provided. Article appearance inspection device characterized by the above-mentioned.
６０％の透光性ベルトであって、無端状に動輪に架装さ
れて走行するものである請求項１記載の検査装置。2. The light-transmissive conveying belt has a light transmittance of 30 to 30.
2. The inspection device according to claim 1, wherein the inspection device is a 60% translucent belt, which runs while being endlessly mounted on a driving wheel.
備えたものであって、上部照明機構と下部照明機構との
照明輝度を６０〜７０：１００とした請求項１または２
記載の検査装置。3. The lighting system according to claim 1, wherein the upper and lower illumination mechanism includes a dimmable light source, and the illumination brightness of the upper illumination mechanism and the lower illumination mechanism is set to 60 to 70: 100.
Inspection device as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36957198A JP3215858B2 (en) | 1998-12-25 | 1998-12-25 | Article appearance inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36957198A JP3215858B2 (en) | 1998-12-25 | 1998-12-25 | Article appearance inspection device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34039796A Division JPH10170450A (en) | 1996-12-06 | 1996-12-06 | Visual inspection apparatus for article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11242005A JPH11242005A (en) | 1999-09-07 |
| JP3215858B2 true JP3215858B2 (en) | 2001-10-09 |
Family
ID=18494772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36957198A Expired - Fee Related JP3215858B2 (en) | 1998-12-25 | 1998-12-25 | Article appearance inspection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3215858B2 (en) |
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|---|---|
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