JP4847187B2 - Inspection apparatus and inspection method - Google Patents

Inspection apparatus and inspection method Download PDF

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JP4847187B2
JP4847187B2 JP2006109051A JP2006109051A JP4847187B2 JP 4847187 B2 JP4847187 B2 JP 4847187B2 JP 2006109051 A JP2006109051 A JP 2006109051A JP 2006109051 A JP2006109051 A JP 2006109051A JP 4847187 B2 JP4847187 B2 JP 4847187B2
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克己 清水
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Eisai Machinery Co Ltd
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本発明は、被検査物体に光を照射して検査する検査装置および検査方法に関する。   The present invention relates to an inspection apparatus and an inspection method for inspecting an object to be inspected by irradiating light.

従来より、薬剤、飲料水、ゼリー、それらの容器など各種の物体について光学的な検査が行われている。例えば、液体に対する異物混入や、変質による色調や透明度の変化を画像処理や、照射した光の吸光度等に基づいて検出する。   Conventionally, optical inspection has been performed on various objects such as drugs, drinking water, jelly, and containers thereof. For example, a change in color tone or transparency due to foreign matter contamination or alteration of the liquid is detected based on image processing, absorbance of irradiated light, or the like.

例えば、ガラスビンなどに収容された液状の薬剤について、カメラで撮影し、その色調から薬剤が正常な状態であるかなどを検査することが行われている。   For example, a liquid medicine stored in a glass bottle or the like is photographed with a camera, and it is inspected from the color tone whether the medicine is in a normal state.

図２には、その検査装置の概略構成が示されている。光源１０からの光は、液体の薬剤１２を収容した容器１４に照射される。容器１４の光源１０とは反対側には、カメラ１６が配置されており、背面から光が照射されている薬剤１２を収容した容器を撮影する。   FIG. 2 shows a schematic configuration of the inspection apparatus. Light from the light source 10 is applied to a container 14 containing a liquid medicine 12. A camera 16 is disposed on the opposite side of the container 14 from the light source 10 and photographs the container containing the medicine 12 irradiated with light from the back.

カメラ１６は、ＣＣＤカメラなどで構成され、フルカラーの画像を得る。カメラ１６により得られた画像は、画像処理装置１８に送られる。画像処理装置１８は、カメラ１６から送られてくる画像について、薬剤１２の部分を取り出し、その色調を検出する。そして、検出結果から、例えば着色が設定値と異なる場合に、薬剤１２を異常と判定する。   The camera 16 is composed of a CCD camera or the like, and obtains a full color image. An image obtained by the camera 16 is sent to the image processing device 18. The image processing device 18 takes out the portion of the medicine 12 from the image sent from the camera 16 and detects its color tone. Then, from the detection result, for example, when the coloring is different from the set value, the medicine 12 is determined to be abnormal.

特開２００３−１３０８０５号公報JP 2003-130805 A 特開平０３−１７５３４４号公報Japanese Patent Laid-Open No. 03-175344

しかし、上記従来例では、比較的着色が薄い場合に、十分な精度で異常を検出することが難しいという問題があった。   However, the conventional example has a problem that it is difficult to detect an abnormality with sufficient accuracy when the coloring is relatively light.

本発明は、光を透過する物体を検査する検査装置であって、被検査物体に検査用の白色光を照射する光源と、前記被検査物体を通過してきた光を反射する反射板と、反射板で反射された光が照射された被検査物体の画像をＲ（赤）、Ｇ（緑）、Ｂ（青）の信号として撮像する撮像装置と、を含み、前記撮像装置の撮像結果である被検査物体の画像におけるＲ（赤）、Ｇ（緑）、Ｂ（青）の各信号の比率が照射した検査用の白色光からどの程度ずれているかを検出することで色調を検出し、被検査物体の検査を行うことを特徴とする。 The present invention is an inspection apparatus for inspecting an object that transmits light, a light source that irradiates the inspection object with white light for inspection, a reflection plate that reflects the light that has passed through the inspection object, and a reflection An imaging device that captures an image of an object to be inspected irradiated with light reflected by a plate as R (red), G (green), and B (blue) signals, and is an imaging result of the imaging device. The color tone is detected by detecting how much the ratio of each signal of R (red), G (green), and B (blue) in the image of the object to be inspected deviates from the irradiated white light for inspection. The inspection object is inspected.

また、前記被検査物体は、容器内の液体であることが好適である。   The inspected object is preferably a liquid in a container.

また、前記撮像結果における被検査物体の色調を検出することで被検査物体を検査することが好適である。   In addition, it is preferable to inspect the inspection object by detecting the color tone of the inspection object in the imaging result.

また、本発明の検査方法は、被検査物体に検査用の白色光を照射し、被検査物体を通過してきた光を反射して、反射された光を被検査物体に照射して、被検査物体の画像をＲ（赤）、Ｇ（緑）、Ｂ（青）の信号として撮像し、得られた被検査物体の画像におけるＲ（赤）、Ｇ（緑）、Ｂ（青）の各信号の比率が照射した検査用の白色光からどの程度ずれているかを検出することで色調を検出し、被検査物体の検査を行うことを特徴とする。


Also, the inspection method of the present invention irradiates the inspection object with white light for inspection, reflects the light passing through the inspection object, irradiates the reflected light to the inspection object, and inspects the image of the object R (red), G (green), and imaged as signal B (blue), R (red) in the image of the inspected object obtained, G (green), each signal B (blue) It is characterized by detecting the color tone by detecting how much the ratio is deviated from the irradiated white light for inspection, and inspecting the object to be inspected.


また、撮像結果における被検査物体の色調を検出することで被検査物体を検査することが好適である。   In addition, it is preferable to inspect the inspection object by detecting the color tone of the inspection object in the imaging result.

本発明によれば、光源を撮像装置側に設け、背面側には反射板を配置している。従って、光源からの光は被検査物体を通過した後反射板で反射される。このため、撮像装置は被検査物体についての直接の像と反射板で反射された像の両方を重ねて撮像することになり、着色の薄い被検査物体についても変色等を効果的に検出することができる。   According to the present invention, the light source is provided on the imaging device side, and the reflection plate is disposed on the back side. Therefore, the light from the light source is reflected by the reflector after passing through the object to be inspected. For this reason, the imaging apparatus superimposes and captures both the direct image of the object to be inspected and the image reflected by the reflector, and effectively detects discoloration or the like even for a lightly colored object to be inspected. Can do.

以下、本発明の実施形態について、図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１には、一実施形態に係る検査装置の構成が示されている。光源２０からの光は、ハーフミラー２２に照射される。このハーフミラー２２により、光源からの光は９０度方向を変え、液体の薬剤２４を収容した容器２６に照射される。この容器２６を通過した光は、反射板２８で反射され、再度容器２６に裏面から照射される。そして、容器を透過した光がハーフミラー２２を通過してカメラ３０に至り、薬剤２４が収容された容器の画像が得られる。   FIG. 1 shows the configuration of an inspection apparatus according to an embodiment. Light from the light source 20 is applied to the half mirror 22. The half mirror 22 changes the direction of the light from the light source by 90 degrees and irradiates the container 26 containing the liquid medicine 24. The light that has passed through the container 26 is reflected by the reflecting plate 28 and is again irradiated to the container 26 from the back surface. And the light which permeate | transmitted the container passes the half mirror 22, reaches the camera 30, and the image of the container in which the chemical | medical agent 24 was accommodated is obtained.

カメラ３０において得られた画像は、画像処理装置３２に供給され、ここで処理される。カメラ３０は、従来例と同様にフルカラーのＣＣＤカメラなどであり、画像処理装置１８は、薬剤１２の部分の画像を取り出し、その色調を検出する。例えば、Ｒ（赤）、Ｇ（緑）、Ｂ（青）の各信号における比率が白色光に比べどの程度ずれているかを検出し、色調を検査する。   An image obtained by the camera 30 is supplied to an image processing device 32 where it is processed. The camera 30 is a full-color CCD camera or the like as in the conventional example, and the image processing device 18 takes out an image of the portion of the medicine 12 and detects its color tone. For example, it detects how much the ratio in each signal of R (red), G (green), and B (blue) deviates from that of white light, and checks the color tone.

そして、この検査結果から、例えば着色が設定値と異なる場合に、薬剤１２を異常と判定する。   Then, from this test result, for example, when the coloring is different from the set value, the medicine 12 is determined to be abnormal.

このように、本実施形態によれば、光源２０を容器２６の背面側に設けるのではなく、カメラ３０側に設け、背面側には反射板２８を配置している。従って、光源２０からの光の一部は薬剤２４および容器２６（被検査物体）を通過した後反射板で反射されて薬剤２４および容器２６に裏面側からもう一度照射される。このため、カメラ３０は薬剤２４および容器２６についての直接の像と反射板で反射された像の両方を重ねて撮像することになり、着色の薄い薬剤２４についても変色等を効果的に検出することができる。   Thus, according to the present embodiment, the light source 20 is not provided on the back side of the container 26 but on the camera 30 side, and the reflection plate 28 is disposed on the back side. Therefore, part of the light from the light source 20 passes through the medicine 24 and the container 26 (object to be inspected), is reflected by the reflecting plate, and is again irradiated to the medicine 24 and the container 26 from the back side. For this reason, the camera 30 superimposes and captures both the direct image of the medicine 24 and the container 26 and the image reflected by the reflector, and effectively detects discoloration or the like of the lightly colored medicine 24. be able to.

ここで、上述した容器２６内の薬剤２４の検査のように、被検査物体が搬送されるものであったり、検査の際に被検査物体を回転する場合には、その搬送系や回転駆動装置などが設けられる。透過光を用いる検査装置では、カメラ３０と光源２０を被検査物体を挟んで配置しなければならず、配置構成の際に搬送系や回転駆動装置などとの干渉を避ける必要がある。   Here, when the object to be inspected is transported as in the case of the inspection of the medicine 24 in the container 26 described above, or when the object to be inspected is rotated during the inspection, the transport system and the rotation drive device are used. Etc. are provided. In an inspection apparatus using transmitted light, the camera 30 and the light source 20 must be disposed with an object to be inspected therebetween, and it is necessary to avoid interference with a transport system, a rotation drive device, and the like during the arrangement configuration.

一方、本実施形態によれば、カメラ３０と、光源２０を容器２６（被検査物体）に対し同一の側に設けることができるため、カメラ３０および光源２０が配置される側の反対側においては、薄い反射板２８が配置されるだけである。従って、検査装置の配置が容易になるという効果が得られる。   On the other hand, according to this embodiment, since the camera 30 and the light source 20 can be provided on the same side with respect to the container 26 (inspected object), on the side opposite to the side where the camera 30 and the light source 20 are arranged. Only the thin reflector 28 is arranged. Therefore, an effect that the arrangement of the inspection apparatus becomes easy can be obtained.

なお、反射板２８は、通常の平面の鏡を使用することができるが、凹面鏡や凸面鏡を使用してもよい。また、光源２０は、例えば、連続点灯の白色ＬＥＤが使用可能であるが、大きな光量が必要な場合にはストロボが好適であり、またキセノンランプなどを使用することもできる。射出光は白色光が好適である。

The reflector 28 can be a normal flat mirror, but a concave mirror or a convex mirror may be used. As the light source 20, for example, a continuously lit white LED can be used, but a strobe is suitable when a large amount of light is required, and a xenon lamp or the like can also be used. Morphism Idemitsu white light Ru preferred der.

さらに、多数の容器２６を連続して移送する軌道を設け、移動する薬剤２４を収容した容器２６をカメラ３０で撮影することも好適である。   Furthermore, it is also preferable to provide a trajectory for continuously transferring a large number of containers 26 and to photograph the container 26 containing the moving medicine 24 with the camera 30.

また、被検査物体としては、上述した容器入りの薬剤などの他、容器自体、ゼリーなど、光を透過する物体であれば適用可能である。   The object to be inspected is applicable to any object that transmits light, such as the above-described medicine in a container, the container itself, and jelly.

図３には、光源２０とカメラ３０を並べて配置し、ハーフミラー２２を省略した構成例を示す。この構成によって、構成部品を少なくすることができる。   FIG. 3 shows a configuration example in which the light source 20 and the camera 30 are arranged side by side and the half mirror 22 is omitted. With this configuration, the number of components can be reduced.

実施形態の構成を示す図である。It is a figure which shows the structure of embodiment. 従来例の構成を示す図である。It is a figure which shows the structure of a prior art example. 他の構成例を示す図である。It is a figure which shows the other structural example.

符号の説明Explanation of symbols

１０，２０ 光源、１２，２４ 薬剤、１４，２６ 容器、１６，３０ カメラ、１８，３２ 画像処理装置、２２ ハーフミラー、２８ 反射板。     10, 20 Light source, 12, 24 Drug, 14, 26 Container, 16, 30 Camera, 18, 32 Image processing device, 22 Half mirror, 28 Reflector.

Claims (4)

光を透過する物体を検査する検査装置であって、
被検査物体に検査用の白色光を照射する光源と、
前記被検査物体を通過してきた光を反射する反射板と、
反射板で反射された光が照射された被検査物体の画像をＲ（赤）、Ｇ（緑）、Ｂ（青）の信号として撮像する撮像装置と、
を含み、
前記撮像装置の撮像結果である被検査物体の画像におけるＲ（赤）、Ｇ（緑）、Ｂ（青）の各信号の比率が照射した検査用の白色光からどの程度ずれているかを検出することで色調を検出し、被検査物体の検査を行うことを特徴とする検査装置。 An inspection apparatus for inspecting an object that transmits light,
A light source for irradiating the inspection object with white light for inspection;
A reflector that reflects light that has passed through the object to be inspected;
An imaging device that captures an image of an object to be inspected irradiated with light reflected by the reflector as R (red), G (green), and B (blue) signals;
Including
It detects how much the ratio of each signal of R (red), G (green), and B (blue) in the image of the object to be inspected, which is the imaging result of the imaging device, deviates from the irradiated white light for inspection. detecting the color tone by the inspection device and performs inspection of the inspected object. 請求項１に記載の検査装置において、
前記被検査物体は、容器内の液体であることを特徴とする検査装置。 The inspection apparatus according to claim 1,
The inspection apparatus is characterized in that the object to be inspected is a liquid in a container. 被検査物体に検査用の白色光を照射し、
被検査物体を通過してきた光を反射して、反射された光を被検査物体に照射して、被検査物体の画像をＲ（赤）、Ｇ（緑）、Ｂ（青）の信号として撮像し、
得られた被検査物体の画像におけるＲ（赤）、Ｇ（緑）、Ｂ（青）の各信号の比率が照射した検査用の白色光からどの程度ずれているかを検出することで色調を検出し、被検査物体の検査を行うことを特徴とする検査方法。 Irradiate the inspected object with white light for inspection,
The light passing through the object to be inspected is reflected, the reflected light is irradiated onto the object to be inspected, and an image of the object to be inspected is picked up as R (red), G (green), and B (blue) signals. And
The color tone is detected by detecting how much the ratio of each signal of R (red), G (green), and B (blue) in the obtained image of the object to be inspected deviates from the irradiated white light for inspection. And an inspection method characterized by inspecting an object to be inspected. 請求項３に記載の検査方法において、
前記被検査物体は、容器内の液体であることを特徴とする検査方法。 The inspection method according to claim 3,
The inspection object is a liquid in a container.
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WO2012129695A1 (en) * 2011-03-31 2012-10-04 Ats Automation Tooling Systems Inc. Three dimensional optical sensing through optical media
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JP6909467B2 (en) * 2017-08-08 2021-07-28 国立大学法人秋田大学 Amber Fragment Type and Transparency Estimator, Estimator, and Estimator Program
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