JP2018044890A - Device, system, and method for detecting films attached on containers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container film detection device capable of accurately detecting films attached on containers.SOLUTION: A container film detection device 100 is configured to detect a film attached on a side face of a container 10 shaped to have a longitudinal axis, and comprises: illumination units 20 configured to illuminate containers 10 from a first direction along the longitudinal direction of the containers 10, image capturing units 30 configured to capture images of the illuminated containers 10 from a second direction along a thickness direction of the film, and an image processing unit 50 configured to process the images captured by the image capturing units 30 to determine whether the film is attached on each container 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a container mounting film detection device for detecting a film mounted on a side surface of a container having a longitudinal axis, a film mounting container detection system including the film detection device, and a container. The present invention relates to a method for detecting a container-mounted film for detecting a film mounted on a container.

  Patent Document 1 discloses an apparatus for inspecting a paper pack that is entirely covered with a heat-shrinkable film and packaged for wrinkles and tears. In this apparatus, a surface light source and a camera are arranged across the inspection plane of the paper pack, and the inspection plane is photographed by the camera with the inspection plane illuminated by the surface light source, and the captured image is processed by the image processing unit. . Then, the presence or absence of wrinkles or tears in the paper pack is determined by using the fact that the luminance value of the corresponding pixel in the photographed image is small at the place where the heat shrink film is wrinkled or torn.

JP, 2014-115185, A

  In recent years, a removable packaging film is sometimes attached to the container outlet to indicate that the packaged product is unopened. Moreover, in order to give a design to a container, a film with a pattern or a label may be attached to the body part of the container.

  In the beverage industry such as beer, a cycle for collecting and reusing used containers has been established. The collected container needs to be stripped naked by removing a package or a mounted item such as a label, and washed and dried before reuse. However, since the container mounting film matches the shape of the container, it is easy for unremoved residue to occur, and when the film is colorless and transparent, it is difficult to determine the presence or absence.

  For example, since many of the conventional returnable bottle inspection devices have an inspection mechanism using transmitted light, it may not be possible to detect a transparent shrink film attached to the bottle opening. In particular, returnable bottles vary in the shade of the bottle color, and it is difficult to stably detect the attached transparent film.

  Therefore, if the film attached to the container is not completely removed in the process of recycling the used container, or the old attached film is overlooked in the inspection process of the recycled container, the old film is attached. The problem arises that unfilled containers are shipped to the market.

  Note that the apparatus described in Patent Document 1 detects wrinkles and tears that occur in a film mounted on a paper pack, and does not detect the presence of the film itself. Therefore, there is a need for a technique for accurately detecting the presence of a film attached to a container.

  It is an object of the present invention to provide a container-mounted film detection device and a film-mounted container detection system that can accurately detect a film mounted on a container.

In the first aspect of the present invention,
A container-mounted film detection device for detecting a film mounted on a side surface of a container having a longitudinal axis,
An illumination device that illuminates the container from a first direction along a longitudinal direction of the container;
An imaging device that photographs the illuminated container from a second direction along the thickness direction of the film;
An image processing device that determines whether or not the film is attached to the container by processing an image captured by the imaging device;
An apparatus for detecting a container-mounted film is provided.

  In the first aspect, in one embodiment, the lighting device may be configured to irradiate the container with substantially parallel light.

  In the first aspect, in an embodiment, the image processing device determines whether or not the film is attached to the container by performing binarization processing on an image captured by the imaging device. Also good.

In the first aspect, in an embodiment, the container may be a bottle container having a mouth,
The film may be a heat shrink film mounted around the mouth of the bottle container.

In the second aspect of the present invention,
A container-mounted film detection device according to a first aspect;
An evacuation device for evacuating the container when it is determined by the image processing apparatus that a film is attached to the container;
A film loading container detection system is provided.

In a third aspect of the present invention, a container mounting film detection method for detecting a film mounted on a side surface of a container,
Illuminating the container from a first direction along the longitudinal direction of the container;
Photographing the illuminated container from a second direction along the thickness direction of the film;
Determining whether the container is loaded with the film by processing a photographed image of the container;
A method for detecting a container-mounted film is provided.

  According to the present invention, the container is illuminated from the first direction along the longitudinal direction of the container using the illumination device, and the container is photographed from the second direction along the thickness direction of the film using the imaging device. The Then, it is determined by the image processing apparatus whether or not a film is attached to the container. In this way, the film mounted on the container can be detected with high accuracy.

It is a figure which shows the container with which the film was mounted | worn, (a) shows the container before opening, (b) shows the container after opening. It is the figure which looked at the detection system of the film mounting container concerning an embodiment of the invention from the upper part. It is the figure which looked at the detection system of the film mounting container which concerns on embodiment of this invention along the conveyance direction of a container. It is a block diagram which shows the apparatus connected to an image processing apparatus. It is a flowchart which shows the detection method of a container mounting | wearing film. It is a figure which shows arrangement | positioning of the illuminating device by an Example, and an imaging device. It is a figure which shows arrangement | positioning of the illuminating device by a comparative example, and an imaging device. In the Example, the image image | photographed with the imaging device is shown, (a) shows the container with which the film is mounted | worn, (b) shows the image of the container with which the film is not mounted | worn. The result of having performed the binarization process with respect to the image shown in FIG. 8 is shown. The range which performed the binarization process in the picked-up image by an Example and a comparative example is shown. In the comparative example, the image image | photographed with the imaging device is shown, (a) shows the container with which the film is mounted | worn, (b) shows the image of the container with which the film is not mounted | worn. The result of having performed the binarization process on the image shown in FIG. 11 is shown. It is a figure explaining the effect | action of the container mounting film detection apparatus by embodiment of this invention. It is a figure explaining an effect | action of the detection apparatus of the container mounting film by a comparative example.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

[Detection system for film container]
A detection system 1000 (hereinafter referred to as a detection system) 1000 for a film mounting container according to an embodiment of the present invention detects the presence of a film 11 mounted on a container 10 containing a beverage and rejects the container 10. It is configured. First, the container 10 and the film 11 that are detection targets of the detection system 1000 will be described.

  As shown in FIG. 1, the shape of the container 10 has a longitudinal axis 12. The longitudinal axis 12 need not coincide with the central axis of the container 10. The container 10 has a smooth side surface. The container 10 may be made of a material such as glass, plastic, or metal. Preferably, the container 10 is made of glass or metal. In the embodiment, the container 10 is a bottle container having a mouth portion 10a, which is a so-called medium bottle and large bottle filled with beer in one example. The film 11 is mounted on the side surface of the container 10, that is, the surface that goes around the longitudinal axis. The side surface that is the mounting position of the film 11 means that it is not necessary to completely surround the periphery of the container 10, and it may be mounted on a part of the periphery.

  In the embodiment, the film 11 is a resin film. The film 11 does not completely correspond to the surface shape of the container 10, its end forms a convex part, and microscopically there is a convex part floating from the surface of the container. . In the embodiment, the film 11 is a transparent film, and in one example is a heat shrink film (shrink film). In addition, transparency here means transparency which is the grade which can see through the surface of the container 10 in the state which attached the film 11 to the surface of the container 10. FIG. Typically, the film 11 is colorless and transparent, and it is difficult to visually recognize its presence particularly in a wet state.

  In the following description and drawings, “Z” is indicated in the longitudinal direction (in the embodiment, up and down direction) of the container, and “X” or “Y” is indicated in the direction perpendicular to the longitudinal direction (in the embodiment, horizontal direction). Sometimes attached. “X” and “Y” are directions perpendicular to each other.

  As shown to Fig.1 (a), the film 11 is normally mounted | worn with the opening | mouth part 10a of the container 10, and its peripheral part. A cut line 11a extending in the horizontal direction is provided at the center of the film 11, and when the user drinks a drink, the upper side of the cut line 11a can be cut off and easily removed. FIG. 1B shows the container 10 with the lid removed and the upper side of the film 11 removed.

  As shown in FIG. 2, the container 10 is disposed on the surface of the transport path 1 and is transported along the transport path 1. As shown in the figure, the conveyance direction of the container 10 is the X direction. The conveyance path 1 is defined by a guide member 2 and operates by driving a conveyor (for example, a table top chain conveyor) (not shown). The plurality of containers 10 transported along the transport path 1 are assumed to have a film 11 attached and a container 11 not attached.

  In the embodiment, an apparatus for cleaning the container 10 is provided on the upstream side of the conveyance path 1, and an apparatus for filling the container 10 with a beverage is provided on the downstream side of the conveyance path 1. In addition, the conveyance path 1 may be provided in the downstream of the apparatus which fills the container 10 with a drink.

  In FIG. 2, the code | symbol 101 shows the inside bottle of beer, and the code | symbol 102 has shown the large bottle of beer. The conveyance path 1 has a size suitable for both the medium bottle 101 and the large bottle 102. However, normally, both the middle bottle 101 and the large bottle 102 are not simultaneously conveyed to the conveyance path 1, but either the middle bottle 101 or the large bottle 102 is continuously conveyed.

  The detection system 1000 includes a film detection device 100 provided in the conveyance path 1. The film detection apparatus 100 is configured to detect the presence of the film 11 attached to the container 10 containing the beverage.

[Container-mounted film detection apparatus 100]
A container-mounted film detection device (hereinafter referred to as a film detection device) 100 includes an illumination device 20, an imaging device 30, a trigger sensor 40, and an image processing device 50. In the embodiment, in order to detect the film attached to the middle bottle 101, the middle bottle illumination device 21, the middle bottle imaging device 31, and the middle bottle trigger sensor 41 are provided. In order to detect, a large bottle illumination device 22, a large bottle imaging device 32, and a large bottle trigger sensor 42 are provided.

  The lighting device 20 illuminates the container 10 from a direction (first direction) along the longitudinal direction of the container 10. In the embodiment, the lighting device 20 illuminates the container 10 from above. The light irradiation surface of the illumination device 20 may be parallel to the surface of the conveyance path 1 or may be perpendicular to the longitudinal direction Z of the container 10. In the embodiment, the lighting device 20 is a lighting device that emits substantially parallel light (that is, light having a high degree of parallelism), and in one example, is a dome-shaped LED lighting device. In the dome type LED lighting device, uniform indirect light is emitted from the light irradiation surface. The distance between the lighting device 20 and the container 10 may be changed depending on, for example, whether the container 10 is the middle bottle 101 or the large bottle 102.

  The side surface of the container 10 is generally parallel to the longitudinal direction or bulges with a gentle slope. Therefore, when parallel light is irradiated from the longitudinal direction of the container 10, the reflected light does not travel in the thickness direction of the film even if the irradiated light does not hit the side surface of the container or hits the swollen portion. . On the other hand, the irradiated light is irregularly reflected when it hits the edge of the film or the uneven portion of the film surface. As a result, the light reflected by the edge or uneven portion of the film also travels in the thickness direction of the film.

  The imaging device 30 may be a CCD camera. The imaging device 30 is arranged such that an optical axis (specifically, an optical axis of a lens of the imaging device 30 (not shown)) extends in a direction (second direction) along the thickness direction of the film 11. Yes. In the embodiment, the imaging device 30 images the container 10 illuminated by the lighting device 20 from the horizontal direction Y. The horizontal direction Y matches or substantially matches the thickness direction of the film 11 mounted on the container 10. However, in a beer bottle or the like, the mouth portion 10a and its peripheral portion do not generally extend straight in the vertical direction Z, but generally extend slightly inclined from the vertical direction Z in the horizontal direction. In this case, a deviation occurs in the vertical direction Z between the horizontal direction Y and the thickness direction of the film 11.

  Since the optical axis of the imaging device 30 extends in the direction along the thickness direction of the film 11, the imaging device 30 receives light irregularly reflected at the end portion of the film or the uneven portion of the film surface, but the light reflected from the side surface of the container is Since little light travels in the thickness direction of the film, it is virtually not received. As a result, the imaging has higher brightness in the film mounting portion than in the side surface portion of the container.

  In the embodiment, as shown in FIG. 3, the optical axis 33 of the imaging device 30 is inclined downward by an angle θ with respect to the horizontal direction Y (or the thickness direction of the film 11). By doing so, when the non-parallel light is included in the irradiation light, even if the non-parallel light is reflected on the side surface of the container 10 and proceeds in the thickness direction of the film, the imaging device 30 is substantially The reflected light from the side of the container can be prevented from being received. The angle θ may be determined based on the inclination angle of the mouth portion 10a of the container 10 along the vertical direction Z and its peripheral portion. In one example, the angle θ is not less than 5 degrees and not more than 9 degrees. The distance between the imaging device 30 and the container 10 may be changed depending on, for example, whether the container 10 is the middle bottle 101 or the large bottle 102.

  The trigger sensor 40 is provided at a position substantially in front of the imaging device 30 in the horizontal direction Y in the conveyance path 1. In the embodiment, the trigger sensor 40 is a photo interrupter. The trigger sensor 40 in the form of a photo interrupter has a light emitting part and a light receiving part, and a signal indicating that the light irradiated from the light emitting part to the light receiving part is blocked by the container 10, that is, the container 10 is an imaging device. A signal indicating arrival at 30 is output.

  As shown in FIGS. 2 and 4, the image processing device 50 includes a power supply unit 23 (not shown in FIG. 2), the imaging device 30, the trigger sensor 40, and the evacuation device 110 of the illumination device 20 via a cable. It is connected to the cylinder control unit 111. In addition to an input unit (keyboard, mouse, etc.) 51, the image processing device 50 has a central processing unit (CPU), a storage unit (memory), an output unit (display, etc.), etc. (not shown). In the embodiment, the input unit 51 is configured to input whether the object of the film detection apparatus 100, that is, whether the container 10 transported along the transport path 1 is the middle bottle 101 or the large bottle 102.

  A signal indicating a captured image is transmitted from the imaging device 30 to the image processing device 50. Further, the image processing device 50 detects that the container 10 has reached the front of the imaging device 30 based on a signal transmitted from the trigger sensor 40. The image processing device 50 transmits a drive signal to the power supply unit 23, thereby driving the illumination device 20. Further, a control signal is transmitted to the cylinder control unit 111, thereby driving the air cylinder 52.

  The central processing unit of the image processing apparatus 50 includes a program showing the film detection method 200 according to the embodiment of the present invention, specifically, a program for processing (digital processing) an image photographed by the imaging device 30, and the container 10. A program for determining whether or not the film 11 is mounted is read from the storage unit and executed. Although the image processing method will be described in detail later, for example, binarization processing or an edge detection method may be performed. In the embodiment, the central processing unit of the image processing device 50 is configured to read and execute a program for detecting the luminance (for example, average luminance, maximum luminance, etc.) of the image captured by the imaging device 30 from the storage unit. Has been.

  The detection system 1000 further includes an evacuation device 110 for evacuating the container 10 when the image processing apparatus 50 determines that the film 11 is attached to the container 10. The evacuation device 110 includes a cylinder control unit 111 and an air cylinder 112 as a pusher that are connected to each other via a cable. The cylinder control unit 111 is connected to the air pressure source 113. The air cylinder 112 receives the control signal transmitted from the cylinder control unit 111 and uses the air supplied from the air pressure source 113 when the container 10 with the film 11 attached is detected. Is sent to the exclusion path 3. The evacuation device 110 may have, for example, a hydraulic pusher instead of the pneumatic pusher (air cylinder 112).

  Next, with reference to the flowchart of FIG. 5, the container-mounted film detection method according to the embodiment of the present invention will be described together with the operation of the film detection apparatus 100 described above.

  Hereinafter, although the kind of the container 10 conveyed along the conveyance path 1 is not specified, when the container 10 is the middle bottle 101, the middle bottle illumination device 21, the middle bottle imaging device 31, and the middle bottle shown in FIG. The trigger sensor 41 is activated, and the large bottle illumination device 22, the large bottle imaging device 32, and the large bottle trigger sensor 42 are not activated. The opposite is true when the container 10 is a large bottle 102.

[Detection method of container-mounted film]
When the trigger sensor 40 is shielded from light by the container 10 transported along the transport path 1, irradiation of light from the lighting device 20 to the container 10 is started, and the imaging of the container 10 by the imaging device 30 is started. A signal indicating the captured image is transmitted from the image processing apparatus 50 to the image processing apparatus 50 (step 201). As described above, on the upstream side of the conveyance path 1, the step of cleaning the container 10 is performed, and the container 10 that is the target of the film detection apparatus 100 is in a wet state when the film 11 is detected.

  In step 202, the brightness of the image captured by the imaging device 30 is detected. When the detected luminance is smaller than the set value, it is determined that there is an abnormality in the illumination device 20 (step 203), and the conveyance of the container 10 and the operation of the film detection device 100 are interrupted.

  On the other hand, if the detected luminance is greater than or equal to the set value, in step 204, digital processing of the image captured by the imaging device 30 is performed. Every time the container 10 is detected by the trigger sensor 40, the image processing is performed on an image captured at the time of detection. In the embodiment, the image processing is binarization processing. Specifically, in a predetermined region set in the image, the number or area (measured value) of pixels having brightness exceeding a threshold value (reference brightness) is compared with the set value. Note that the threshold value may be determined by a suitable method among known P-tile methods, mode methods, discriminant identification methods, and the like.

  If the measured value is equal to or smaller than the set value in step 204, it is determined that the film 11 is not attached to the container 10 (step 205), the container 10 is transported downstream as it is, and the container 10 is filled with a beverage. The step of performing is performed. In addition, you may implement the film detection method by embodiment after the step which fills the container 10 with a drink.

  On the other hand, if the measured value is larger than the set value in step 204, it is determined that the film 11 is attached to the container 10 (step 207), and the container 10 is sent to the waste passage 3 by the air cylinder 52 of the waste device 110. . In the evacuated container 10, the film 11 is removed by, for example, water pressure or a mechanical method using a brush or the like.

  Note that, as described above, the image processing does not have to be binarization processing, and may be image processing based on an edge detection method that determines an edge of a captured image based on, for example, a difference in luminance value of pixels. In addition, various image processing methods such as a straight line detection method may be used. At this time, the presence of the film 11 can be detected based on the number of edges and straight lines included in a predetermined region set in the image.

[Example]
Next, the film detection apparatus 100 and the film detection method 200 according to the embodiment of the present invention will be specifically described with reference to FIGS. 6 to 12 and examples and comparative examples. It is not limited to the embodiment.

  In the example and the comparative example, the film 11 was detected on the container 10 with the lid. First, with reference to FIG. 6 and FIG. 7, the arrangement of the illumination device and the imaging device used in the example and the comparative example will be described. Note that the dimensions shown in FIGS. 6 and 7 may be different from the actual drawings.

  As shown in FIG. 6, in the Example, the film 11 was detected with respect to the inside bottle 101 which is an example of the container 10 using the above-mentioned film detection apparatus 100. As the film 11, a heat shrink film made of polyethylene terephthalate (PET) was used. Domed LED illumination was used as the illumination device 20. A CCD camera was used as the imaging device 30. As shown in the figure, the distance between the light irradiation surface of the illumination device 20 and the container 10 was set to 40 mm. The distance between the center of the lens of the imaging device 30 and the container 10 was 370 mm. The height of the imaging device 30 with respect to the surface of the conveyance path 1 was 220 mm. The optical axis 33 of the imaging device 30 was inclined 5 degrees downward with respect to the horizontal direction.

  As shown in FIG. 7, in the comparative example, the film 11 was detected using a film detection device that differs from the above-described film detection device 100 only in the configuration of the illumination device. In the comparative example, the two illumination devices 121 and 122 (LED bar illumination) were arranged one above the other, and the container 10 was illuminated from an angle close to the horizontal direction. As shown in the figure, the distance between the light irradiation surfaces of the lighting devices 121 and 122 and the container 10 was set to 70 mm. The centers of the light irradiation surfaces of the illuminating devices 121 and 122 were inclined 5 degrees downward with respect to the horizontal direction. The height of the upper illuminating device 121 and the lower illuminating device 122 with respect to the surface of the conveyance path 1 was set to 270 mm and 180 mm, respectively. The dimensions of the imaging device 30 are the same as the dimensions of the embodiment described with reference to FIG.

  In the comparative example, since the light is incident on the container 10 at an angle that is perpendicular or close to that, the intensity of the reflected light increases. Therefore, in the comparative example, the intensity of the light emitted from the illumination device was made smaller than in the example.

  8 and 9 show the results of the examples. FIG. 8 is an image of the container 10 taken by the imaging device 30 before image processing. FIG. 9 is an image after the binarization process is performed on the pixels in the area shown in FIG. 10 (area surrounded by a square) in the image shown in FIG. 8 and 9A show the container 10 with the film 11 mounted thereon, and FIGS. 8B and 9B show the container 10 without the film 11 mounted thereon.

  In FIGS. 8 and 9, black and white are reversed and displayed for easy understanding. Therefore, in FIGS. 8 and 9, the area displayed in black indicates that the reflected light has high luminance, and the area displayed in white indicates that the luminance is low. In particular, a region displayed in black in FIG. 9 indicates a pixel having brightness exceeding a threshold used in the binarization process. In FIGS. 9A and 9B, the threshold values used for the binarization process are the same.

  When (a) and (b) in FIG. 9 are compared, in the example, the case where the film 11 is attached to the container 10 (a) and the case (b) where the film 11 is not mounted, the brightness displayed in black. There is a large difference in the area of the high region. Therefore, in the embodiment, it can be expected that the determination result of the presence / absence of the film 11 performed in step 204 of the flowchart of FIG.

  11 and 12 show the results of the comparative example. 11 and 12 show images corresponding to FIGS. 8 and 9. Similar to the embodiment, the threshold value used in the binarization process is the same in FIGS. 12A and 12B. When (a) and (b) of FIG. 12 are compared, in the comparative example, when the film 11 is attached to the container 10 (a) and when it is not (b), the luminance displayed in black is shown. There is no big difference in the area of the high region. That is, in the comparative example, although the film 11 is not attached to the container 10, the reflected light having the same intensity as that when the film 11 is attached is measured. Therefore, in the comparative example, the determination result of the presence / absence of the film 11 performed in step 204 of the flowchart of FIG. 5 may not match the actual presence / absence of the film 11.

  The possible reason for the difference between the example and the comparative example in the binarized image will be described with reference to FIGS.

  First, a comparative example will be described with reference to FIG. 14A shows a case where the film 11 is attached to the container 10, and FIG. 14B shows a case where the film 11 is not attached. In FIG. 14, only the upper illumination device 121 is shown, and the lower illumination device 122 is omitted. The reflectance of a heat shrink film that is transparent is not so large compared to the reflectance of a beer bottle made of glass. Therefore, as in the comparative example, when the container 10 is illuminated from the horizontal direction using the illumination devices 121 and 122 and the container 10 is photographed from the direction close to the horizontal direction using the imaging device 30 (see FIG. 7), Of the light incident on the lens of the imaging device 30, the sum of the intensity of the light 401 reflected by the surface of the film 11 and the intensity of the light 402 that has passed through the film 11 and reflected by the surface of the container 10 is The intensity of light 403 reflected by the surface of the container 10 that is not mounted is about the same. Therefore, as shown in FIG. 12, it is difficult to distinguish between the case where the film 11 is attached to the container 10 and the case where the film 11 is not attached.

  Next, an embodiment will be described with reference to FIG. 13A shows a case where the film 11 is attached to the container 10, and FIG. 13B shows a case where the film 11 is not attached. As in the embodiment, when the container 10 is illuminated from above using the illumination device 20 and the container 10 is photographed from a direction close to the horizontal direction using the imaging device 30 (see FIG. 6), the imaging device 30 is mainly configured. Lights 301 and 302 incident on the rough surface of the film 11 and diffusely reflected enter the lens. On the other hand, since the illumination device 20 irradiates light from above the container 10, the intensity of the light reflected by the surface of the container 10 and incident on the lens of the imaging device 30 is clearly reduced.

  In particular, when the film 11 is a heat-shrinkable film and is attached by using a dryer with human hands, for example, it is considered that the heat-shrinkable film is not necessarily heated uniformly throughout the film 11. In this case, the film 11 does not stick to the surface of the container 10 and has many portions floating from the surface. In such a portion floating from the surface of the container 10 or an edge portion of the film 11, irregular reflection is likely to occur, and the intensity of light incident on the lens of the imaging device 30 increases.

  On the other hand, when the film 11 is not attached to the container 10, the light 303 and 304 emitted from the same position as the light 301 and 302 in the same direction on the light irradiation surface of the lighting device 20 is at least the peripheral portion of the mouth 10 a. The reflected light of the light 303 and 304 on the surface of the container 10 does not enter the imaging device 30. Therefore, as shown in FIG. 9, it is difficult to distinguish between the case where the film 11 is attached to the container 10 and the case where the film 11 is not attached.

  As described above, according to the film detection apparatus 100 according to the embodiment of the present invention, the determination result of the presence / absence of the film 11 based on the processing of the image captured by the imaging device 30 is the actual presence / absence of the film 11. Is expected to match. That is, the presence of the film 11 attached to the container 10 can be detected with high accuracy.

  In particular, when the container 10 is a returnable bottle, there is a possibility that the collected bottle may vary in color shading or scratches depending on the usage environment in the market. Even in such a case, since the illumination device 20 and the imaging device 30 are arranged so that the reflected light coming from the container 10 is hardly detected in the film detection device 100, the presence of the film 11 can also be accurately detected. . In this way, it is possible to prevent the returnable bottle with the film around the mouth from flowing out to the market.

[Modification]
Although the present invention has been described with the embodiment, the present invention is not limited to the above-described embodiment. The features described in each embodiment may be freely combined. In addition, various improvements, design changes, and deletions may be added to the above-described embodiment.

DESCRIPTION OF SYMBOLS 1 Conveyance path 10 Container 10a Mouth part 12 Longitudinal axis 11 Film 20, 21, 22 Illuminating device 30, 31, 32 Imaging device 33 Optical axis 40, 41, 42 (of imaging device) Trigger sensor 50 Image processing device 100 Container mounting film Detection device 110 evacuation device 1000 Film loading container detection system

Claims (6)

A container-mounted film detection device for detecting a film mounted on a side surface of a container having a longitudinal axis,
An illumination device that illuminates the container from a first direction along a longitudinal direction of the container;
An imaging device that photographs the illuminated container from a second direction along the thickness direction of the film;
An image processing device that determines whether or not the film is attached to the container by processing an image captured by the imaging device;
Container-mounted film detection device. The illumination device is configured to irradiate the container with substantially parallel light;
The container-mounted film detection device according to claim 1. The image processing device determines whether or not the film is attached to the container by performing binarization processing on an image photographed by the imaging device.
The container-mounted film detection device according to claim 1 or 2. The container is a bottle container having a mouth,
The film is a heat-shrink film mounted around the mouth of the bottle container.
The container mounting film detection device according to any one of claims 1 to 3. The container-mounted film detection device according to any one of claims 1 to 4,
An evacuation device for evacuating the container when it is determined by the image processing apparatus that a film is attached to the container;
Film loading container detection system. A method for detecting a container mounting film for detecting a film mounted on a side surface of a container,
Illuminating the container from a first direction along the longitudinal direction of the container;
Photographing the illuminated container from a second direction along the thickness direction of the film;
Determining whether the container is loaded with the film by processing a photographed image of the container;
A method for detecting a container-mounted film.