JP2019053000A - Foreign matter inspection device - Google Patents
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- JP2019053000A JP2019053000A JP2017178792A JP2017178792A JP2019053000A JP 2019053000 A JP2019053000 A JP 2019053000A JP 2017178792 A JP2017178792 A JP 2017178792A JP 2017178792 A JP2017178792 A JP 2017178792A JP 2019053000 A JP2019053000 A JP 2019053000A
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- 238000007689 inspection Methods 0.000 title claims abstract description 33
- 238000003384 imaging method Methods 0.000 claims abstract description 59
- 238000005286 illumination Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 15
- 239000011521 glass Substances 0.000 abstract description 62
- 230000032258 transport Effects 0.000 description 18
- 239000000126 substance Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000004049 embossing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000009987 spinning Methods 0.000 description 4
- 235000013361 beverage Nutrition 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000010191 image analysis Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
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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
- G01N21/94—Investigating contamination, e.g. dust
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
本発明は、ガラス壜などの透光性容器の底部を撮像して透光性容器内に異物があるか否かを検査するための異物検査装置に関するものである。 The present invention relates to a foreign substance inspection apparatus for imaging the bottom part of a translucent container such as a glass bottle to inspect whether or not there is a foreign substance in the translucent container.
飲料等の液体が充填されたガラス壜内に、金属片やガラス片等の異物が混入している場合がある。異物はガラス壜の底部に沈殿していることが多い。そのため、ガラス壜に飲料等の液体を充填した後にガラス壜の底部に異物が沈殿しているか否かの検査が行われる。異物を検出するための装置として、画像処理により異物を検出する異物検査装置がある（例えば特許文献１参照）。具体的には、ガラス壜を搬送装置で搬送しているときに、ガラス壜の斜め下方からカメラでガラス壜の底部を撮像し、得られた画像から異物を検出する。異物は、画像上に白い、または黒い影として現れるので、画像処理により異物の有無を検出することが可能である。 In some cases, foreign substances such as metal pieces and glass pieces are mixed in a glass bottle filled with a liquid such as a beverage. Foreign objects often settle on the bottom of the glass bottle. Therefore, after filling the glass bottle with a liquid such as a beverage, an inspection is performed as to whether or not foreign matter has precipitated on the bottom of the glass bottle. As a device for detecting foreign matter, there is a foreign matter inspection device that detects foreign matter by image processing (see, for example, Patent Document 1). Specifically, when the glass bottle is being conveyed by the conveying device, the bottom of the glass bottle is imaged with a camera from an obliquely lower side of the glass bottle, and foreign matter is detected from the obtained image. Since the foreign matter appears as a white or black shadow on the image, it is possible to detect the presence or absence of the foreign matter by image processing.
ガラス壜の底部の外面には、通常、文字または数字なとのエンボスまたは刻印が形成されていることがある。このようなエンボスや刻印は、同じように影として画像上に現れるので、従来の異物検査装置はエンボスや刻印を異物として検出してしまう場合がある。そこで、異物を精度よく検出するために、液体が充填された容器をスピンさせた後に容器のスピンを停止させ、液体中を動く異物を検出する異物検査装置がある（特許文献２参照）。しかしながら、このタイプの異物検査装置は、容器をスピンさせるための特殊な搬送装置が必要であり、異物検査装置の全体が大きくなるのみならず、工場に既設の搬送装置を使用することができない。 On the outer surface of the bottom of the glass bottle, embossing or inscriptions such as letters or numbers are usually formed. Since such an emboss or stamp appears on the image as a shadow in the same manner, a conventional foreign matter inspection apparatus may detect the emboss or stamp as a foreign matter. Therefore, in order to detect foreign matter with high accuracy, there is a foreign matter inspection device that detects a foreign matter moving in a liquid by stopping spinning of the container after spinning a container filled with liquid (see Patent Document 2). However, this type of foreign matter inspection apparatus requires a special transfer device for spinning the container, and not only the entire foreign matter inspection device becomes large, but also the existing transfer device in the factory cannot be used.
容器をスピンさせないで容器を検査する装置として、容器の上から照明し、容器の底部を透過した透過光を、容器の下方に配置された撮像手段で受けて画像を生成する異物検査装置がある（特許文献３参照）。しかしながら、この装置でも、容器の底部を下から撮像するために、容器の両側を挟みながら容器を搬送する特殊な搬送装置が必要となる。 As an apparatus for inspecting a container without spinning the container, there is a foreign substance inspection apparatus that generates an image by illuminating from above the container and receiving the transmitted light transmitted through the bottom of the container with an imaging means disposed below the container. (See Patent Document 3). However, even in this apparatus, in order to image the bottom of the container from below, a special transport apparatus that transports the container while sandwiching both sides of the container is required.
そこで、本発明は、ガラス壜などの透光性容器の底部に形成されたエンボスや刻印などの影響を受けることなく、かつ既設の搬送装置で搬送される透光性容器内の異物を精度よく検出することができる異物検査装置を提供することを目的とする。 Therefore, the present invention is not affected by the embossing or engraving formed on the bottom of the translucent container such as a glass bottle and accurately removes foreign matter in the translucent container that is transported by an existing transport device. It is an object of the present invention to provide a foreign substance inspection apparatus capable of detecting.
本発明の一態様は、搬送装置によって搬送される透光性容器の側方に配置され、液体が充填された前記透光性容器を照明する照明装置と、前記搬送装置を挟んで前記照明装置と対向して配置され、前記透光性容器の底部の画像を生成する撮像装置と、前記底部の画像を処理する画像処理装置を備え、前記照明装置から発せられた光が、前記底部の内面で反射した第１の光と、前記底部内を進行して前記底部の外面で反射する第２の光に分かれたときに、前記撮像装置は、前記第１の光を受けることができる位置であって、かつ前記外面で反射した前記第２の光の前記内面への入射角が臨界角よりも大きい位置に配置されていることを特徴とする異物検査装置である。 One embodiment of the present invention is an illumination device that is disposed on a side of a translucent container that is transported by a transport device and that illuminates the translucent container filled with a liquid, and the illumination device that sandwiches the transport device And an image processing device that generates an image of the bottom portion of the translucent container, and an image processing device that processes the image of the bottom portion, and the light emitted from the illumination device is an inner surface of the bottom portion When the imaging device is separated into the first light reflected by the second light and the second light that travels in the bottom and reflects on the outer surface of the bottom, the imaging device can receive the first light. The foreign matter inspection apparatus is characterized in that the second light reflected by the outer surface is disposed at a position where an incident angle to the inner surface is larger than a critical angle.
本発明の好ましい態様は、前記撮像装置は、前記搬送装置上の前記透光性容器の底部の内面よりも高い位置に配置されていることを特徴とする。
本発明の好ましい態様は、前記撮像装置は、前記第１の光を受けることができる位置に配置された反射ミラーを備えていることを特徴とする。
In a preferred aspect of the present invention, the imaging device is arranged at a position higher than the inner surface of the bottom of the translucent container on the transport device.
In a preferred aspect of the present invention, the imaging apparatus includes a reflecting mirror disposed at a position where the first light can be received.
透光性容器の底部内を液体に向かって進行する第２の光の入射角が臨界角よりも大きいとき、第２の光は底部の内面で全反射し、第２の光は液体には進行しない。本発明によれば、撮像装置は第２の光を受けないので、撮像装置によって生成される画像には、底部の外面に形成されているエンボスや刻印が現れない。結果として、異物検査装置は、エンボスや刻印などの影響を受けることなく透光性容器内の異物を精度よく検出することができる。 When the incident angle of the second light traveling toward the liquid in the bottom of the translucent container is larger than the critical angle, the second light is totally reflected on the inner surface of the bottom, and the second light is not reflected in the liquid Does not progress. According to the present invention, since the image pickup device does not receive the second light, the image generated by the image pickup device does not have embossing or marking formed on the outer surface of the bottom. As a result, the foreign matter inspection apparatus can accurately detect foreign matter in the translucent container without being affected by embossing or marking.
本発明によれば、撮像装置は透光性容器の側方に配置することができる。したがって、透光性容器を搬送するための搬送装置には、ストレートコンベヤなどの、一般的なタイプの搬送装置を用いることができる。よって、本発明の異物検査装置は、工場に既に設置されている搬送装置をそのまま利用して、透光性容器の検査を行うことが可能である。 According to the present invention, the imaging device can be disposed on the side of the translucent container. Therefore, a general type conveying device such as a straight conveyor can be used as the conveying device for conveying the translucent container. Therefore, the foreign substance inspection apparatus of the present invention can inspect a translucent container by using a transport apparatus already installed in a factory as it is.
以下、本発明の実施形態について図面を参照して説明する。
図１は、本発明の異物検査装置の一実施形態を示す正面図であり、図２は図１に示す異物検査装置の上面図である。図１および図２において、符号１は、透光性容器の一例であるガラス壜を表す。本実施形態の異物検査装置は、飲料等の液体が充填された状態で、ガラス壜１の底部１ａに異物があるか否かを検査する。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing an embodiment of the foreign matter inspection apparatus of the present invention, and FIG. 2 is a top view of the foreign matter inspection apparatus shown in FIG. In FIG. 1 and FIG. 2, the code | symbol 1 represents the glass bottle which is an example of a translucent container. The foreign substance inspection apparatus of this embodiment inspects whether or not there is a foreign substance on the bottom 1a of the glass bottle 1 in a state filled with a liquid such as a beverage.
異物検査装置は、液体が充填されたガラス壜１を照明する照明装置３と、ガラス壜１の底部１ａの内面１ｂで反射した光からガラス壜１の底部１ａの画像を生成する撮像装置５と、撮像装置５によって生成された画像を処理する画像処理装置７とを備える。照明装置３および撮像装置５は、搬送装置１０の両側に配置されている。すなわち、照明装置３は、搬送装置１０によって搬送されるガラス壜１の側方に配置されており、撮像装置５は、搬送装置１０を挟んで照明装置３と対向して配置されている。本実施形態では、撮像装置５は、搬送装置１０の側方に配置され、かつ搬送装置１０の搬送面（ガラス壜１の載置面）１０ａよりも高い位置に配置されている。 The foreign matter inspection apparatus includes an illuminating device 3 that illuminates a glass bottle 1 filled with a liquid, an imaging device 5 that generates an image of the bottom 1a of the glass bottle 1 from light reflected by the inner surface 1b of the bottom 1a of the glass bottle 1. And an image processing device 7 for processing an image generated by the imaging device 5. The illumination device 3 and the imaging device 5 are disposed on both sides of the transport device 10. That is, the illuminating device 3 is disposed on the side of the glass bottle 1 conveyed by the conveying device 10, and the imaging device 5 is disposed to face the illuminating device 3 with the conveying device 10 interposed therebetween. In the present embodiment, the imaging device 5 is disposed on the side of the transport device 10 and is disposed at a position higher than the transport surface of the transport device 10 (the placement surface of the glass bottle 1) 10a.
照明装置３は、拡散光を発することができるように構成されており、照明装置３の光源として、例えば発光ダイオードが使用される。撮像装置５は、ＣＣＤやＣＭＯＳなどのイメージセンサを備えたカメラ５ａを備えている。照明装置３はガラス壜１の底部１ａに拡散光を照射し、撮像装置５はガラス壜１の底部１ａから反射した光をイメージセンサで受けて、ガラス壜１の底部１ａの画像を生成するように構成されている。 The illuminating device 3 is configured to emit diffused light, and, for example, a light emitting diode is used as a light source of the illuminating device 3. The imaging device 5 includes a camera 5a including an image sensor such as a CCD or a CMOS. The illuminating device 3 irradiates the bottom 1a of the glass bottle 1 with diffused light, and the imaging device 5 receives light reflected from the bottom 1a of the glass bottle 1 with an image sensor so as to generate an image of the bottom 1a of the glass bottle 1. It is configured.
本実施形態では、図１に示すように、撮像装置５は、搬送装置１０上のガラス壜１の底部１ａの内面１ｂよりも高い位置に配置されている。より具体的には、撮像装置５のカメラ５ａは、搬送装置１０上のガラス壜１の底部１ａの内面１ｂを向いて、下方に傾斜している。一例では、ガラス壜１の底部１ａの内面１ｂに対する撮像装置５の角度は、１０度未満である。 In the present embodiment, as shown in FIG. 1, the imaging device 5 is arranged at a position higher than the inner surface 1 b of the bottom 1 a of the glass bottle 1 on the transport device 10. More specifically, the camera 5 a of the imaging device 5 is inclined downward toward the inner surface 1 b of the bottom 1 a of the glass bottle 1 on the transport device 10. In one example, the angle of the imaging device 5 with respect to the inner surface 1b of the bottom 1a of the glass bottle 1 is less than 10 degrees.
異物検査装置は、次のようにしてガラス壜１の検査を行う。ガラス壜１は、搬送装置１０によって所定の速度で搬送される。図２に示すように、搬送装置１０は直線コンベヤであり、複数のガラス壜１を一定の間隔で搬送する。照明装置３は、搬送装置１０によって移動されているガラス壜１の底部１ａを照明しながら、撮像装置５はガラス壜１の底部１ａの内面１ｂで反射した光を受け、底部１ａの画像を生成する。 The foreign matter inspection apparatus inspects the glass bottle 1 as follows. The glass bottle 1 is conveyed by the conveying apparatus 10 at a predetermined speed. As shown in FIG. 2, the conveying apparatus 10 is a linear conveyor, and conveys a plurality of glass bottles 1 at regular intervals. While the illumination device 3 illuminates the bottom 1a of the glass bottle 1 being moved by the transport device 10, the imaging device 5 receives the light reflected by the inner surface 1b of the bottom 1a of the glass bottle 1 and generates an image of the bottom 1a. To do.
画像処理装置７は、画像を撮像装置５から受け取り、画像分析を実行する。より具体的には、画像処理装置７は、底部１ａの画像に基づいてガラス壜１の底部１ａに異物があるか否かを決定する。異物は、白い、または黒い影として画像に現れるので、画像処理装置７は画像に基づいて異物を検出することができる。ガラス壜１内に異物を検出したときは、画像処理装置７は、アラーム信号を発信するようにしてもよい。撮像装置５および画像処理装置７は、同じようにして、搬送装置１０によって搬送される複数のガラス壜１を順次検査する。 The image processing device 7 receives an image from the imaging device 5 and executes image analysis. More specifically, the image processing device 7 determines whether or not there is a foreign object on the bottom 1a of the glass bottle 1 based on the image of the bottom 1a. Since the foreign matter appears in the image as a white or black shadow, the image processing apparatus 7 can detect the foreign matter based on the image. When a foreign object is detected in the glass bottle 1, the image processing device 7 may send an alarm signal. The imaging device 5 and the image processing device 7 sequentially inspect the plurality of glass bottles 1 conveyed by the conveying device 10 in the same manner.
照明装置３は、いわゆる面照明であり、広い面積から多方向に光を発することができるように構成されている。図３は、照明装置３から発せられた拡散光がガラス壜１の底部１ａの内面１ｂで反射する様子を示す模式図である。図３に示すように、ガラス壜１の底部１ａの内面１ｂは、一般に、上方に突出する湾曲形状を有する。照明装置３から発せられた拡散光は、様々な入射角で底部１ａの内面１ｂに入射し、内面１ｂで反射する。反射した光はガラス壜１の側面１ｄを透過し、撮像装置５は、ガラス壜１の底部１ａの内面１ｂで反射した光の一部を受ける。図３に示す例では、一点鎖線で示す光は撮像装置５によって受けられるが、点線で示す光は撮像装置５では受けられない。したがって、一点鎖線で示す光が照射される範囲が、検査範囲である。 The illuminating device 3 is so-called surface illumination, and is configured to emit light from a wide area in multiple directions. FIG. 3 is a schematic diagram showing how the diffused light emitted from the lighting device 3 is reflected by the inner surface 1b of the bottom 1a of the glass bottle 1. As shown in FIG. As shown in FIG. 3, the inner surface 1b of the bottom 1a of the glass bottle 1 generally has a curved shape protruding upward. Diffused light emitted from the illumination device 3 is incident on the inner surface 1b of the bottom 1a at various incident angles and is reflected by the inner surface 1b. The reflected light is transmitted through the side surface 1d of the glass bottle 1, and the imaging device 5 receives a part of the light reflected by the inner surface 1b of the bottom 1a of the glass bottle 1. In the example illustrated in FIG. 3, the light indicated by the alternate long and short dash line is received by the imaging device 5, but the light indicated by the dotted line is not received by the imaging device 5. Accordingly, the range irradiated with the light indicated by the alternate long and short dash line is the inspection range.
図４は、撮像装置５の位置を説明する図である。撮像装置５は、ガラス壜１の底部１ａの内面１ｂで反射した光のうち、次のような光を受けることができる位置に配置されている。すなわち、照明装置３から発せられた光が、ガラス壜１の底部１ａの内面１ｂで反射した第１の光Ｌ１と、底部１ａ内を進行して底部１ａの外面１ｃで反射する第２の光Ｌ２に分かれたときに、撮像装置５は底部１ａの内面１ｂで反射した第１の光Ｌ１を受けることができる位置であって、かつ外面１ｃで反射した第２の光Ｌ２の内面１ｂへの入射角αが臨界角よりも大きい位置に配置されている。このような位置に配置された撮像装置５は、ガラス壜１の底部１ａの外面１ｃで反射した第２の光Ｌ２を受けないので、外面１ｃに形成されているエンボス１５が現れない画像を生成することができる。 FIG. 4 is a diagram illustrating the position of the imaging device 5. The imaging device 5 is disposed at a position where the following light can be received from the light reflected by the inner surface 1 b of the bottom 1 a of the glass bottle 1. That is, the light emitted from the lighting device 3 is reflected by the first light L1 reflected by the inner surface 1b of the bottom 1a of the glass bottle 1, and the second light that travels through the bottom 1a and is reflected by the outer surface 1c of the bottom 1a. When divided into L2, the imaging device 5 is a position where it can receive the first light L1 reflected by the inner surface 1b of the bottom portion 1a, and the second light L2 reflected by the outer surface 1c is directed to the inner surface 1b. The incident angle α is arranged at a position larger than the critical angle. Since the imaging device 5 arranged at such a position does not receive the second light L2 reflected by the outer surface 1c of the bottom 1a of the glass bottle 1, an image in which the emboss 15 formed on the outer surface 1c does not appear is generated. can do.
一般に、屈折率の大きい媒質から屈折率の小さい媒質に進行する光の入射角が臨界角よりも大きいとき、光は媒質間の界面で全反射することが知られている。ガラス壜１の屈折率は、ガラス壜１内の液体の屈折率よりも高いので、ガラス壜１の底部１ａから液体に進行する第２の光Ｌ２の入射角αには臨界角が存在する。臨界角は、ガラス壜１の屈折率と液体の屈折率とから計算により予め求められる。第２の光Ｌ２の入射角αが臨界角よりも大きいとき、図４に示すように、第２の光Ｌ２は底部１ａの内面１ｂで全反射し、第２の光Ｌ２は液体中を進行しない。したがって、第２の光Ｌ２は撮像装置５には到達しない。 In general, it is known that when an incident angle of light traveling from a medium having a high refractive index to a medium having a low refractive index is larger than a critical angle, the light is totally reflected at the interface between the media. Since the refractive index of the glass bottle 1 is higher than the refractive index of the liquid in the glass bottle 1, there is a critical angle in the incident angle α of the second light L2 traveling from the bottom 1a of the glass bottle 1 to the liquid. The critical angle is obtained in advance by calculation from the refractive index of the glass bottle 1 and the refractive index of the liquid. When the incident angle α of the second light L2 is larger than the critical angle, as shown in FIG. 4, the second light L2 is totally reflected by the inner surface 1b of the bottom 1a, and the second light L2 travels in the liquid. do not do. Accordingly, the second light L2 does not reach the imaging device 5.
図５は、第２の光Ｌ２の入射角αが臨界角よりも小さいときの、光の進行の様子を示す図である。第２の光Ｌ２の入射角αが臨界角よりも小さいとき、第２の光Ｌ２の一部は、図５に示すように、ガラス壜１の底部１ａから液体に進行し、液体を透過して撮像装置５に到達する。この場合、撮像装置５によって生成される画像には、エンボス１５が現れてしまう。 FIG. 5 is a diagram illustrating how light travels when the incident angle α of the second light L2 is smaller than the critical angle. When the incident angle α of the second light L2 is smaller than the critical angle, a part of the second light L2 travels from the bottom 1a of the glass bottle 1 to the liquid as shown in FIG. To the imaging device 5. In this case, the emboss 15 appears in the image generated by the imaging device 5.
図６は、図４に示す、第２の光Ｌ２の入射角αが臨界角よりも大きい位置に配置された撮像装置５によって生成された画像を示す図であり、図７は、図５に示す、第２の光Ｌ２の入射角αが臨界角よりも小さい位置に配置された撮像装置５によって生成された画像を示す図である。図６の画像を取得したときの、ガラス壜１の底部１ａの内面１ｂに対する撮像装置５の角度は１０度未満であり、図７の画像を取得したときの、ガラス壜１の底部１ａの内面１ｂに対する撮像装置５の角度は約３０度であった。 FIG. 6 is a diagram showing an image generated by the imaging device 5 arranged at a position where the incident angle α of the second light L2 is larger than the critical angle shown in FIG. 4, and FIG. It is a figure which shows the image produced | generated by the imaging device 5 arrange | positioned in the position where the incident angle (alpha) of 2nd light L2 shown is smaller than a critical angle. The angle of the imaging device 5 with respect to the inner surface 1b of the bottom 1a of the glass bottle 1 when the image of FIG. 6 is acquired is less than 10 degrees, and the inner surface of the bottom 1a of the glass bottle 1 when the image of FIG. The angle of the imaging device 5 with respect to 1b was about 30 degrees.
図６および図７から分かるように、図７に示す画像には異物２０およびエンボス１５が現れているのに対して、図６に示す画像には異物２０が現れているが、エンボスは現れていない。このように、本実施形態の異物検査装置は、ガラス壜１の底部１ａの外面１ｃに形成されているエンボスや刻印などの影響を受けることなく、ガラス壜１内の異物を精度よく検出することができる。 As can be seen from FIG. 6 and FIG. 7, the foreign material 20 and the emboss 15 appear in the image shown in FIG. 7, whereas the foreign material 20 appears in the image shown in FIG. Absent. As described above, the foreign matter inspection apparatus according to the present embodiment can accurately detect the foreign matter in the glass bottle 1 without being affected by the embossing or marking formed on the outer surface 1c of the bottom 1a of the glass bowl 1. Can do.
撮像装置５はガラス壜１の側方に配置することができる。本実施形態では、撮像装置５は、搬送装置１０上のガラス壜１の底部１ａの内面１ｂよりも高い位置に配置されている。上述したように、第１の光Ｌ１を受けることができ、かつ第２の光Ｌ２の入射角αが臨界角よりも大きいという条件を満たす限りにおいて、撮像装置５の位置および角度は特に限定されない。したがって、ガラス壜１を搬送するための搬送装置１０には、ストレートコンベヤなどの、一般的なタイプの搬送装置を使用ことができる。よって、本実施形態の異物検査装置は、工場に既に設置されている搬送装置をそのまま利用して、ガラス壜の検査を行うことが可能である。 The imaging device 5 can be disposed on the side of the glass bottle 1. In the present embodiment, the imaging device 5 is disposed at a position higher than the inner surface 1b of the bottom 1a of the glass bottle 1 on the transport device 10. As described above, the position and angle of the imaging device 5 are not particularly limited as long as the first light L1 can be received and the condition that the incident angle α of the second light L2 is larger than the critical angle is satisfied. . Therefore, a general type conveyance device such as a straight conveyor can be used for the conveyance device 10 for conveying the glass bottle 1. Therefore, the foreign substance inspection apparatus of this embodiment can inspect the glass bottle using the transport apparatus already installed in the factory as it is.
図８は、異物検査装置の他の実施形態を示す図である。特に説明しない本実施形態の構成および動作は、図１および図２に示す実施形態と同じであるので、その重複する説明を省略する。図８に示す実施形態では、撮像装置５は、カメラ５ａと搬送装置１０との間に配置された反射ミラー５ｂを備えている。ガラス壜１の底部１ａの内面１ｂで反射した光は、反射ミラー５ｂでさらに反射してカメラ５ａに到達する。カメラ５ａは反射ミラー５ｂの上方に配置されている。 FIG. 8 is a diagram showing another embodiment of the foreign matter inspection apparatus. The configuration and operation of the present embodiment not specifically described are the same as those of the embodiment shown in FIGS. In the embodiment shown in FIG. 8, the imaging device 5 includes a reflection mirror 5 b disposed between the camera 5 a and the transport device 10. The light reflected by the inner surface 1b of the bottom 1a of the glass bottle 1 is further reflected by the reflection mirror 5b and reaches the camera 5a. The camera 5a is disposed above the reflection mirror 5b.
本実施形態においても、撮像装置５の反射ミラー５ｂは、図４に示す撮像装置５と同じ位置に配置されている。すなわち、反射ミラー５ｂは、ガラス壜１の底部１ａの内面１ｂで反射した第１の光Ｌ１を受けることができる位置であって、かつ外面１ｃで反射した第２の光Ｌ２の内面１ｂへの入射角αが臨界角よりも大きい位置に配置されている。したがって、本実施形態の異物検査装置は、ガラス壜１の底部１ａの外面１ｃに形成されているエンボスや刻印などの影響を受けることなく、ガラス壜１内の異物を精度よく検出することができる。また、カメラ５ａは反射ミラー５ｂを介して第１の光Ｌ１を受けることができるので、カメラ５ａの設置位置の自由度が増す。一実施形態では、カメラ５ａは反射ミラー５ｂの下方に配置されてもよい。 Also in this embodiment, the reflection mirror 5b of the imaging device 5 is disposed at the same position as the imaging device 5 shown in FIG. That is, the reflecting mirror 5b is a position where the first light L1 reflected by the inner surface 1b of the bottom 1a of the glass bottle 1 can be received, and the second light L2 reflected by the outer surface 1c is directed to the inner surface 1b. The incident angle α is arranged at a position larger than the critical angle. Therefore, the foreign substance inspection apparatus of this embodiment can detect the foreign substance in the glass bowl 1 accurately, without being influenced by the embossing or the marking formed on the outer surface 1c of the bottom 1a of the glass bowl 1. . Further, since the camera 5a can receive the first light L1 via the reflection mirror 5b, the degree of freedom of the installation position of the camera 5a is increased. In one embodiment, the camera 5a may be disposed below the reflection mirror 5b.
図９は、異物検査装置のさらに他の実施形態を示す図である。特に説明しない本実施形態の構成および動作は、図１および図２に示す実施形態と同じであるので、その重複する説明を省略する。図９に示す実施形態では、複数の撮像装置５，２２，２３が設けられている。これらの撮像装置５，２２，２３は、搬送装置１０を挟んで照明装置３とは反対側に配置され、いずれも照明装置３を向いている。撮像装置２２，２３は、撮像装置５と同じように、第１の光Ｌ１を受けることができ、かつ第２の光Ｌ２の入射角αが臨界角よりも大きいという条件を満たす位置および角度に配置されている。画像処理装置７は、撮像装置５，２２，２３に接続されており、これらの撮像装置５，２２，２３から送られてくる画像を処理してガラス壜１内の異物を検出するように構成されている。 FIG. 9 is a view showing still another embodiment of the foreign matter inspection apparatus. The configuration and operation of the present embodiment not specifically described are the same as those of the embodiment shown in FIGS. In the embodiment shown in FIG. 9, a plurality of imaging devices 5, 22, and 23 are provided. These imaging devices 5, 22, and 23 are arranged on the opposite side of the illumination device 3 with the transport device 10 interposed therebetween, and all face the illumination device 3. As with the imaging device 5, the imaging devices 22 and 23 can receive the first light L1 and have positions and angles that satisfy the condition that the incident angle α of the second light L2 is larger than the critical angle. Has been placed. The image processing device 7 is connected to the imaging devices 5, 22, and 23, and is configured to process the images sent from these imaging devices 5, 22, and 23 to detect foreign matter in the glass bottle 1. Has been.
本実施形態では、図２に示す撮像装置５に加えて、２台の撮像装置２２，２３が撮像装置５の両側に配置されているが、より多くの撮像装置を設けてもよい。本実施形態に係る異物検査装置は、同時に複数のガラス壜１の検査を行うことが可能であり、スループットが向上する。図８に示す反射ミラー５ｂは図９の実施形態にも適用することが可能である。 In the present embodiment, in addition to the imaging device 5 shown in FIG. 2, the two imaging devices 22 and 23 are arranged on both sides of the imaging device 5, but more imaging devices may be provided. The foreign substance inspection apparatus according to the present embodiment can inspect a plurality of glass bottles 1 at the same time, and the throughput is improved. The reflection mirror 5b shown in FIG. 8 can also be applied to the embodiment of FIG.
上述した実施形態は、本発明が属する技術分野における通常の知識を有する者が本発明を実施できることを目的として記載されたものである。上記実施形態の種々の変形例は、当業者であれば当然になしうることであり、本発明の技術的思想は他の実施形態にも適用しうる。したがって、本発明は、記載された実施形態に限定されることはなく、特許請求の範囲によって定義される技術的思想に従った最も広い範囲に解釈されるものである。 The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Accordingly, the present invention is not limited to the described embodiments, but is to be construed in the widest scope according to the technical idea defined by the claims.
１ ガラス壜
３ 照明装置
５ 撮像装置
５ａ カメラ
５ｂ 反射ミラー
７ 画像処理装置
１０ 搬送装置
１５ エンボス
２０ 異物
２２，２３ 撮像装置
Ｌ１ 第１の光
Ｌ２ 第２の光
DESCRIPTION OF SYMBOLS 1 Glass jar 3 Illuminating device 5 Imaging device 5a Camera 5b Reflecting mirror 7 Image processing device 10 Conveying device 15 Emboss 20 Foreign matter 22, 23 Imaging device L1 First light L2 Second light
Claims (3)
前記搬送装置を挟んで前記照明装置と対向して配置され、前記透光性容器の底部の画像を生成する撮像装置と、
前記底部の画像を処理する画像処理装置を備え、
前記照明装置から発せられた光が、前記底部の内面で反射した第１の光と、前記底部内を進行して前記底部の外面で反射する第２の光に分かれたときに、前記撮像装置は、前記第１の光を受けることができる位置であって、かつ前記外面で反射した前記第２の光の前記内面への入射角が臨界角よりも大きい位置に配置されていることを特徴とする異物検査装置。 An illuminating device that illuminates the translucent container that is disposed on the side of the translucent container that is transported by the transport device and that is filled with liquid;
An imaging device that is disposed opposite to the illumination device across the transport device and generates an image of the bottom of the translucent container;
An image processing device for processing the bottom image;
When the light emitted from the illumination device is divided into first light reflected by the inner surface of the bottom and second light that travels in the bottom and reflects by the outer surface of the bottom, Is arranged at a position where the first light can be received, and an incident angle of the second light reflected by the outer surface to the inner surface is larger than a critical angle. Foreign matter inspection equipment.
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| CN201880060193.6A CN111094951A (en) | 2017-09-19 | 2018-09-13 | Foreign matter inspection device |
| PCT/JP2018/034014 WO2019059097A1 (en) | 2017-09-19 | 2018-09-13 | Foreign object inspection apparatus |
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| JP2004317426A (en) | 2003-04-18 | 2004-11-11 | Kirin Techno-System Corp | Apparatus for inspecting bottom of container for foreign substances |
| JP4668354B1 (en) * | 2010-07-20 | 2011-04-13 | トリオ・セラミックス株式会社 | Transparent tube bubble detection device and bubble detection method |
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| JP2013134099A (en) * | 2011-12-26 | 2013-07-08 | Kirin Techno-System Co Ltd | Foreign substance inspection device |
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