WO2018198248A1 - 容器の検査装置及び容器の検査方法 - Google Patents
容器の検査装置及び容器の検査方法 Download PDFInfo
- Publication number
- WO2018198248A1 WO2018198248A1 PCT/JP2017/016616 JP2017016616W WO2018198248A1 WO 2018198248 A1 WO2018198248 A1 WO 2018198248A1 JP 2017016616 W JP2017016616 W JP 2017016616W WO 2018198248 A1 WO2018198248 A1 WO 2018198248A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- container
- light
- unit
- inspection
- screen
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
Definitions
- the present invention relates to a container inspection apparatus and a container inspection method.
- Non-Patent Document 1 There is known a model number reading device that reads characters and symbols having a concavo-convex shape formed on the outer surface of a container, particularly a glass bottle.
- the uneven shape is a shape that protrudes from the outer surface of the glass bottle, a shape that is recessed inward from the outer surface, or a shape that is a combination of the protruded shape and the recessed shape.
- a general glass bottle model number reading device optically reads the model number (mold number) formed as a concavo-convex shape on the bottom and bottom of the bottle, and combines it with defect information from an inspection machine that inspects the quality of the bottle. Used for quality control.
- the inspection results of each bottle are automatically tabulated for each mold corresponding to the read character, and it is possible to know what kind of defects occur in which mold is molded. .
- the arrangement of the optical system of the model number reader is generally classified according to whether the light received by the light receiver is reflected light or transmitted light.
- the reflection type is a method in which light from a projector reflected from a glass bottle is read by a light receiver.
- the transmission type is a method in which light from a projector that has passed through a glass bottle is read by a light receiver.
- the inspection device previously proposed by the present applicant is a typical example of a transmissive character reader (Patent Document 1).
- This transmissive character reader is an epoch-making device that solves the difficulty of character reading in a transparent (or translucent) glass bottle.
- the model number is easily recognized by projecting it onto the screen using the lens effect of embossed characters.
- Patent Document 1 it is possible to reduce misrecognition of a model number in a transparent (or translucent) glass bottle, but it is necessary to provide an illumination arrangement space behind the glass bottle.
- Patent Document 2 a reflective character reader (container inspection system) has been further proposed (Patent Document 2).
- this character reading apparatus does not disclose a specific solution method for clarifying the contour of the concavo-convex shape in a transparent (or translucent) glass bottle using reflected light.
- a reflective character reader a shadow of a double reflection of characters (uneven shape) occurs in a transparent glass bottle. Such double-shadows are picked up with a darkness close to that of characters, causing reading errors and reading errors. A reading mistake or the like affects the subsequent processing.
- An object of the present invention is to provide a container inspection apparatus and a container inspection method capable of inspecting the uneven shape of the outer surface of the container.
- the present invention has been made to solve at least a part of the above-described problems, and can be realized as the following aspects or application examples.
- the container inspection apparatus is A light emitting unit for irradiating light to the uneven shape formed on the outer surface of the container; A rotation support for supporting the container rotating about the central axis of the container; A condensing lens that projects the light reflected on the container out of the light from the light emitting unit onto the screen; An imaging unit that captures an image projected on the screen; It is characterized by including.
- the image processing apparatus may further include a processing unit that recognizes characters from the image captured by the imaging unit.
- the reflected light can be used efficiently.
- the imaging unit, the condenser lens, the screen, and the light emitting unit may be fixed on a single substrate.
- each part can be arranged at an appropriate position in a short time by changing the position of the substrate according to the type of the container to be inspected.
- the uneven shape formed on the outer surface of the container can be a letter protruding from the outer surface of the container.
- characters protruding from the outer surface of the container can be reliably read.
- the container inspection method according to this application example is: Rotate the container around the central axis of the container, Light is emitted from the light emitting part toward the uneven shape formed on the outer surface of the container, The reflected light from the container is projected onto the screen by the condenser lens, The image of the screen is picked up by an image pickup unit.
- the uneven shape includes letters, Characters can be recognized from the image captured by the imaging unit.
- the light from the light-emitting portion can be diffused by a diffusion plate to irradiate the uneven shape formed on the outer surface of the container.
- the reflected light can be used efficiently.
- the diffusion plate has a diffusion angle unified to a predetermined angle as a whole, The diffusion angle may be 10 ° to 40 °.
- the present invention can provide a container inspection apparatus and a container inspection method capable of inspecting the uneven shape of the outer surface of the container.
- FIG. 1 is a plan view of a container inspection apparatus.
- FIG. 2 is a plan view of the inspection unit showing the arrangement of the light emitting unit, the imaging unit, and the container.
- FIG. 3 is a side view of the container inspection unit.
- FIG. 4 is a plan view illustrating the relationship between the light emitting unit and the diffusion plate.
- FIG. 5 is a front view for explaining the skirt and the screen of the container.
- FIG. 6 is a diagram illustrating characters in a captured image.
- FIG. 7 is a flowchart of the container inspection method.
- the container inspection apparatus includes a light emitting unit that irradiates light to the uneven shape formed on the outer surface of the container, a rotation support unit that supports the container that rotates about the central axis of the container, It includes a condenser lens that projects light reflected from the light-emitting unit on the container onto a screen, and an imaging unit that captures an image projected on the screen.
- FIG. 1 is a plan view of an inspection apparatus 1 for a container 10 (hereinafter referred to as “inspection apparatus 1”).
- the inspection apparatus 1 includes a carry-in entrance 78, a transport path 72, a carry-out exit 79, and an inspection unit 2 arranged on the machine base 70.
- the inspection apparatus 1 further includes a control unit 61 that controls the entire apparatus.
- the conveyance path 72 is formed in a circular shape centered on the conveyance center axis 75.
- the container 10 is conveyed in the clockwise direction in FIG.
- the container 10 is intermittently carried into the conveyance path 72 from the carry-in port 78 of the inspection apparatus 1.
- the conveyance path 72 is provided with a rotation support portion 30 (only one is shown in FIG. 1), and supports the containers 10 one by one.
- the container 10 is intermittently transported along the transport path 72 to each stage while being supported by the rotation support unit 30.
- the inspection station 74 is provided in the middle of the conveyance path 72 of the container 10 and can sequentially inspect the containers 10 conveyed to the inspection station 74.
- the inspection station 74 By providing the inspection station 74 in the middle of the conveyance path 72, it is possible to sequentially and efficiently inspect during the conveyance of the container 10.
- the inspection unit 2 In the conveyance path 72, the inspection unit 2 is provided in one of the inspection stations 74. Further, although not described in the present embodiment, an inspection different from the inspection item in the inspection unit 2 can be performed in another inspection station 74.
- the container 10 stopped at the inspection station 74 of the inspection unit 2 rotates around the central axis 12 of the container 10 together with the rotation support portion 30.
- the conveyance path 72 is not limited to a circular shape, and may be formed in another shape, for example, a linear shape.
- the container 10 is a glass bottle.
- Other containers can be used as the container 10 as long as the material reflects light.
- As the glass bottle not only a conventional colored glass bottle advantageous for a reflection type optical system but also a colorless and transparent (Flint) glass bottle can be an inspection object.
- FIG. 2 is a plan view of the inspection unit 2 showing the arrangement of the light emitting unit 20, the imaging unit 40 and the container 10
- FIG. 3 is a side view of the inspection unit 2 of the container 10.
- the rotation support unit 30 supports the container 10 that rotates about the central axis 12.
- the rotation support unit 30 rotates together with the container 10 while supporting the bottom 14 of the container 10.
- the central axis 12 is an imaginary line serving as a rotation central axis around which the container 10 rotates.
- the side roller 32 rotates the container 10 about the central axis 12.
- the rotation support part 30 should just support the container 10 to rotate at least, and the structure which does not rotate with the container 10 may be sufficient.
- the rotation support unit 30 is a member for transporting the container 10 to a predetermined position to be inspected shown in FIGS. 2 and 3 in a state where the container 10 is supported. Accordingly, the container 10 is sequentially and intermittently conveyed to a predetermined position for inspecting the container 10 by the rotation support unit 30, and the container 10 is rotated around the central shaft 12 by the rotation of the side roller 32 when the container 10 is disposed at the predetermined position.
- the container 10 may be intermittently transported to the inspection station 74 using a star wheel provided in the transport path 72. In that case, the rotation support portion 30 is disposed at each inspection station 74.
- the side roller 32 transmits the driving force of the motor 60 to the container 10 via the belt 35 or the like according to a command from the rotation control unit 62 of the control unit 61 to rotate the container 10.
- the side roller 32 rotates a predetermined amount at a predetermined speed in accordance with a command from the rotation control unit 62.
- the predetermined amount of rotation is an amount sufficient to image the entire circumference of the container 10.
- the predetermined amount of rotation is set to, for example, 1.2 rotations or more so that the entire circumference of the detection body can be grasped with one image data.
- the rotation amount of the side roller 32 is calculated as the rotation amount of the container 10 by the control unit 61 based on the output of the rotation detection unit 54.
- the rotation detection unit 54 can be a rotary encoder attached to the motor 60 directly or indirectly.
- control unit 61 and the processing unit 50 described later each include a calculation unit (CPU or the like), a storage unit (ROM, RAM, HDD, or the like), a communication unit (communication interface or the like), and a display unit (display or the like). be able to.
- CPU calculation unit
- storage unit ROM, RAM, HDD, or the like
- communication unit communication interface or the like
- display unit display or the like
- Inspection Unit 2 The inspection unit 2 will be described with reference to FIGS.
- the inspection unit 2 includes a light emitting unit 20 that irradiates light to the uneven shape 17 formed on the outer surface 16 of the container 10, and a container 10 that rotates about the central axis 12.
- a rotation support unit 30 to support, a condensing lens 42 for projecting light reflected from the light emitting unit 20 on the container 10 onto the screen 44, and an imaging unit 40 for capturing an image projected on the screen 44.
- the inspection unit 2 can reliably inspect the uneven shape 17 of the outer surface 16 of the colored container and the colorless and transparent container 10 using a reflective optical system.
- the inspection unit 2 further includes a processing unit 50 that executes image processing and character recognition processing.
- the inspection unit 2 can be attached to the existing inspection apparatus 1 as an additional configuration together with the processing unit 50.
- the inspection unit 2 can image the concavo-convex shape 17 formed on the outer surface 16 of the container 10 and execute a predetermined inspection based on the captured image.
- the predetermined inspection includes, for example, recognizing the model number of the mold in which the container 10 is molded from the uneven shape 17. Further, as the predetermined inspection, for example, a defect in the outer surface 16 of the container 10 may be inspected.
- the uneven shape 17 is, for example, a symbol and includes Arabic numerals, alphabets, dots, and the like.
- the symbols used for the glass bottle include a symbol indicating a manufacturing factory determined by each glass bottle manufacturer, a mold number, and the like.
- a combination of an Arabic numeral and an alphabet is used as a symbol in Japan, and a dot or the like is used as a symbol overseas.
- the processing unit 50 recognizes the character from the image captured by the image capturing unit 40.
- the inspection unit 2 can reliably recognize characters on the outer surface 16 of the container 10 using a reflective optical system.
- FIG. 4 is a plan view for explaining the relationship between the light emitting unit 20 and the diffusion plate 22.
- the light emitting unit 20 is fixed on the substrate 48 and irradiates the uneven shape 17 formed on the outer surface 16 of the container 10 with light.
- the light emitting unit 20 is a light source that illuminates the container 10.
- the light emitting unit 20 can use spot illumination, for example.
- the spot illumination includes a light source such as an LED (Light Emitting Diode) and a condensing lens that can collect light in a predetermined range at a predetermined distance.
- the light emitting unit 20 can employ spot illumination or the like that can emit parallel light.
- the light emitting unit 20 is not limited to spot illumination as long as the reflected light from the container 10 has sufficient brightness for imaging, and other known illumination can be employed.
- the inspection unit 2 further includes a diffusion plate 22 between the light emitting unit 20 and the container 10.
- the diffusion plate 22 can diffuse the light from the light emitting unit 20 and irradiate the container 10.
- the light emitting unit 20 and the diffusion plate 22 are fixed to the mounting rail 24 fixed to the substrate 48.
- the diffusion plate 22 diffuses the parallel light from the light emitting unit 20 at a predetermined angle while erasing the luminance unevenness of the light from the light emitting unit 20.
- the light transmitted through the diffusion plate 22 can uniformly illuminate the outer surface 16 of the container 10 in a predetermined range in a state where luminance unevenness is eliminated.
- the container 10 may be irradiated with the light emitting unit 20 and the diffusing plate 22 that integrally emit the diffused light.
- the range in which the outer surface 16 of the container 10 is illuminated using the light emitting unit 20 and the diffusion plate 22 is set to at least the range of the concavo-convex shape 17 imaged by the imaging unit 40 described later.
- the range is set so as to illuminate a range including at least the overall height of the uneven shape 17.
- the concave / convex shape 17 is generally formed on the bottom 15 of the container 10. This is because the cylindrical body portion 13 is normally used as a label surface for displaying contents. Since the concavo-convex shape 17 is formed on the curved skirt portion 15 that connects the body portion 13 and the bottom portion 14, when only parallel light is irradiated, the intensity of the reflected light is excessively increased. When the concavo-convex shape 17 is provided in the skirt 15, relatively uniform reflected light can be obtained by using the diffusion plate 22.
- the diffusion plate 22 preferably has a diffusion angle unified at a predetermined angle as a whole. By aligning the diffusion angle in the diffusion plate 22 as a whole, it is possible to clarify the shadow of characters and the like projected on the screen 44. Further, by aligning the diffusion angle in the diffusion plate 22 as a whole, even if the curvature of the skirt 15 of the container 10 is small, the width of the bright background around the characters projected on the screen 44 is not easily reduced. The bright background will be described later with reference to FIG. As a result of an experiment for recognizing the image of the concavo-convex shape 17 in the imaging unit 40, it was found that the diffusion plate 22 preferably has a diffusion angle of 10 ° to 40 °. In FIG. 4, the diffusion angle of the diffusion plate 22 is indicated by ⁇ 1. The diffusion angle is an angle of spread of light transmitted through the diffusion plate with respect to incident light from the light emitting unit 20. The diffusion angle of the diffusion plate 22 is preferably 25 ° to 35 °.
- the condensing lens 42 projects the light reflected by the container 10 out of the light emitted from the light emitting unit 20 onto the screen 44.
- the condensing lens 42 is disposed at a position where it can receive light regularly reflected by the outer surface 16 (region including the concavo-convex shape 17) of the container 10 in the light of the light emitting unit 20.
- the condensing lens 42 is composed of a plurality of lenses and condenses the light reflected on the container 10.
- the condenser lens 42 is disposed on the substrate 48 so that the image of the concavo-convex shape 17 is projected onto the screen 44 by reflected light.
- the condenser lens 42 is attached to the container 10 side of the lens fixing plate 43 whose lower end is fixed to the substrate 48.
- the lens fixing plate 43 is formed with a through hole as shown in FIGS. 2 and 3 (partially shown in cross section), and can project the light collected by the condenser lens 42 onto the screen 44.
- the screen 44 is a translucent sheet, and for example, the same material as that of the diffusion plate 22 can be used.
- the screen 44 can project an image of the concavo-convex shape 17 by projecting the light of the condenser lens 42.
- As the screen 44 a so-called transmission screen having a diffusion layer can be adopted.
- the screen 44 is fixed to a screen fixing plate 45 whose lower end is fixed to the substrate 48, and is fixed so as to close a through hole provided in the screen fixing plate 45.
- the condensing lens 42 projects an image of the concavo-convex shape 17 onto the screen 44, so that the depth of field in the imaging unit 40 can be reduced, and even if the container 10 is a transparent glass bottle, a double projection of the concavo-convex shape 17 is obtained. Can be prevented. Double reflection means that when a transparent glass bottle is imaged in a conventional reflective optical system, not only the reflected light of the uneven shape 17 but also the reflected light of the image of the uneven shape 17 reflected on the inner surface of the container 10 is reflected in the camera. Therefore, an image in which the concavo-convex shape 17 is doubled is captured. For this reason, in the conventional reflective reader, the original contour of the concavo-convex shape 17 cannot be clearly recognized.
- the depth of field of the imaging unit 40 can be reduced by using the condenser lens 42 and the screen 44, and the influence of the reflected light of the image of the concavo-convex shape 17 reflected on the inner surface of the container 10. Can be reduced.
- the concavo-convex shape 17 formed on the skirt 15 of the container 10 is projected clearly on the screen 44 through a condenser lens 42 (not shown).
- a condenser lens 42 not shown.
- FIG. 5 only a part of the uneven shape 17 is projected, but since the container 10 rotates, the entire uneven shape 17 is sequentially projected onto the screen 44.
- the concavo-convex shape 17 is a shape that protrudes from the outer surface 16 of the container 10, a shape that is recessed inward from the outer surface 16, or a shape that is a combination of the protruded shape and the recessed shape.
- the container 10 is a glass bottle, the unevenness carved into the mold is transferred to the outer surface 16 of the container 10.
- the uneven shape 17 formed on the outer surface 16 of the container 10 is a character protruding from the outer surface 16 of the container 10.
- the inspection unit 2 projects characters projected from the outer surface 16 of the container 10 onto the screen 44, thereby preventing double reflection and allowing the processing unit 50 to be described later to recognize it reliably.
- Imaging Unit 40 As shown in FIGS. 2 and 3, the imaging unit 40 is disposed on an extension line connecting the container 10, the condenser lens 42, and the screen 44. The imaging unit 40 is fixed on the substrate 48. The imaging unit 40 is arranged so as to image the uneven shape 17 of the outer surface 16 of the container 10 projected onto the screen 44.
- the imaging unit 40 is disposed at a position where an image projected on the screen 44 can be captured in front.
- the condenser lens 42, the screen 44, and the imaging unit 40 are specularly reflected by the outer surface 16 with the optical axis of the light emitting unit 20 indicated by a one-dot chain line in FIG. 2 for ease of installation space and various adjustments of the imaging unit 40. It is arranged on the optical axis.
- the imaging unit 40 may not be on the optical axis of the one-dot chain line in FIG. 2 as long as it can capture an image projected on the screen 44.
- the condensing lens 42, the screen 44, and the imaging unit 40 capture the light of the light emitted from the light emitting unit 20 that is regularly reflected by the skirt 15 having a curved surface.
- the inspection unit 2 is tilted at an angle ⁇ 2 according to the position. This is because the uneven shape 17 is usually on the curved surface of the skirt 15.
- the inspection unit 2 By inclining the inspection unit 2 at an angle ⁇ 2, the light from the light emitting unit 20 can be regularly reflected by the skirt 15 and reach the imaging unit 40 via the condenser lens 42 and the screen 44.
- the dark concavo-convex shape 17 appears on a light background on the screen 44.
- the angle ⁇ 2 is an angle of the optical axis of the light emitting unit 20 and the imaging unit 40 with respect to the horizontal plane.
- the imaging unit 40 can use, for example, a known line sensor camera. An image captured by using the line sensor camera has a high resolution. The imaging unit 40 captures an image in accordance with the rotation speed of the container 10 based on the output of the rotation detection unit 54, so that the image 80 is not affected even if the rotation speed changes for some reason.
- the processing unit 50 receives image data in which the imaging unit 40 images the entire circumference (1.2 or more laps) of the body unit 13, and performs predetermined image processing on the image data. In addition, the processing unit 50 executes a predetermined inspection from the image data that has undergone image processing. Since the processing unit 50 is attached to the existing inspection device 1 as an additional configuration, the processing unit 50 is provided in a casing independent of the control unit 61 of the inspection device 1, but may be a part of the control unit 61.
- FIG. 6 is a diagram for explaining characters in the captured image 80.
- the concavo-convex shape 17 includes a plurality of characters 18 and an identification symbol 19.
- the character 18 shows an example in which “123” is displayed.
- the identification symbol 19 is a single straight line extending in the horizontal direction, and is arranged at the lowest position of the character 18.
- the identification symbol 19 is a so-called underbar.
- the character 18 and the identification symbol 19 are not limited to this example.
- the image 80 includes a bright background area where the characters 18 and the identification symbol 19 are imaged, and dark areas above and below the image 80 (shown by shading).
- the bright background region is a portion where the light of the light emitting unit 20 specularly reflected by the skirt 15 is projected on the screen 44.
- the dark region is a portion where light does not reach the screen 44 sufficiently because light is diffused up and down by the curved surface of the skirt 15.
- the width in the height direction of the bright background region can be adjusted by the diffusion angle of the diffusion plate 22 or the like.
- the processing unit 50 first searches for the identification symbol 19 in the identification area 81 where only the identification symbol 19 of the image 80 in FIG. 6 exists independently (pattern matching). Specifically, an image portion (identification symbol 19) that matches the image data for verification stored in advance in a storage unit (not shown) of the processing unit 50 is searched. Since the identification symbol 19 is an underbar and does not exist at a certain height or higher of the image 80 unlike the other characters 18, for example, the lower half of the image 80 is set as an identification region 81.
- the processing unit 50 finds the identification symbol 19 in the identification region 81, the processing unit 50 sets a predetermined region in the OCR (Optical Character Recognition / Reader) region 82 from a position that is a predetermined distance in the horizontal direction from the identification symbol 19. This is because the identification symbol 19 and the character 18 are always formed in the same positional relationship.
- OCR Optical Character Recognition / Reader
- the image 80 shown in FIG. 6 has been subjected to predetermined image processing by the processing unit 50.
- image processing processing for making the contour of the concavo-convex shape 17 stand out is performed.
- known gradation conversion processing can be performed.
- gradation conversion process for example, a shading correction process, a process for performing gradation conversion based on a difference from the reference image, a dynamic threshold method (dynamic binarization process), or the like can be employed.
- the processing unit 50 can execute a predetermined inspection on the image 80 that has undergone image processing.
- the predetermined inspection is, for example, a process of reading the character 18 from the uneven shape 17.
- the character 18 may be a model number of a mold in which the container 10 is molded.
- the processing unit 50 outputs the result of the predetermined inspection to the control unit 61.
- the model number read based on the inspection result of the processing unit 50 may be stored, for example, in an external storage unit (not shown) and may be aggregated as data indicating the relationship between the model number and the quality of the container. If the relationship between the model number and the quality of the container is known, for example, the molding conditions of a mold for molding the inferior quality container 10 can be adjusted.
- the processing unit 50 executes a process of extracting characters from the image 80 that has been subjected to image processing.
- the process of extracting characters can be executed by extracting the shape of the black part from the OCR region 82 of the image 80, for example.
- the processing unit 50 performs pattern matching processing on characters 18 in the OCR area 82 with characters registered in a storage unit (not shown) of the processing unit 50 in advance.
- the pattern matching process is a so-called known OCR process.
- the processing unit 50 can store the result of determining that the character 18 in the OCR area 82 matches the registered character in a storage unit (not shown). For example, the result can be stored via the control unit 61 of the inspection apparatus 1. Can be output to an external higher-level information collection device.
- the model number of the container 10 inspected by the inspection unit 2 and the result of inspection by another inspection apparatus can be used as characteristic (defect) information for each mold.
- the use of such characteristic information can be performed by, for example, a higher-level information collection device in the production line of the container 10.
- the processing unit 50 is not limited to character recognition. For example, when the concavo-convex shape 17 is a dot symbol, the processing unit 50 recognizes a combination of dots, compares it with a combination of dots registered in the processing unit 50 in advance, and similarly determines the determination result. It can be stored in a storage unit (not shown).
- processing unit 50 may execute not only the process of recognizing the symbol such as the character 18 but also other inspection items at the same time.
- a substrate 48 is fixed on a machine base 70 of the inspection apparatus 1.
- the imaging unit 40, the condenser lens 42, the screen 44, and the light emitting unit 20 are fixed on one substrate 48.
- each part can be arranged at an appropriate position in a short time by changing the position of the substrate 48 according to the type of the container 10 to be inspected.
- the substrate 48 is fixed on the machine base 70 by the fixing portion 49.
- the fixing portion 49 is fixed to the machine base 70.
- the fixing unit 49 can move the substrate 48 in the Y direction (vertical direction) and the X direction (horizontal direction) with respect to the machine base 70, and the light emitting unit 20 and the like are arranged at predetermined positions with respect to the container 10, Can be fixed.
- the fixing portion 49 can be disposed by inclining the substrate 48 at an arbitrary angle ⁇ 2 with respect to the horizontal plane.
- the angle ⁇ ⁇ b> 2 can be adjusted according to the position of the concavo-convex shape 17 in the container 10.
- the fixing portion 49 is adjusted according to the changed container 10 to adjust the Y of the substrate 48.
- the inspection unit 2 can be adjusted in a short time by setting the position in the direction and the X direction to appropriate positions (positions where the uneven shape 17 is clearly projected on the screen 44).
- the conventional transparent container 10 does not require a complicated operation of installing the light emitting unit 20 inside the conveyance path 72, and it is not necessary to change the inspection unit 2 depending on the color of the container 10.
- the inspection apparatus 1 uses the condensing lens 42 and the screen 44, unlike the apparatus of Patent Document 1, it is not necessary to arrange a translucent screen near the container 10 (1 mm to 3 mm). The screen 44 is not damaged by the falling bottle or bottle, and the readjustment of the apparatus is not required.
- the container inspection method rotates the container 10 about the central axis 12 and emits light from the light emitting unit 20 toward the concavo-convex shape 17 formed on the outer surface 16 of the container 10.
- the reflected light from the container 10 is projected onto the screen 44 by the condenser lens 42, and an image of the screen 44 is captured by the imaging unit 40.
- the concavo-convex shape 17 of the outer surface 16 of the container 10 can be reliably inspected using a reflective optical system.
- FIG. 7 is a flowchart of the inspection method for the container 10.
- the processing unit 50 instructs the imaging unit 40 to start imaging.
- the imaging unit 40 obtains imaging timing from a signal output from the rotation detection unit 54 as it rotates, and images, for example, the entire circumference (for example, 1.2 or more) of the skirt 15.
- the light of the light emitting unit 20 is diffused by the diffusion plate 22 and irradiated to the uneven shape 17 formed on the outer surface 16 of the container 10.
- the processing unit 50 stores the captured image 80 in a storage unit (not shown).
- the processing unit 50 performs an identification symbol search for the captured image 80.
- the identification symbol search the position of the identification symbol 19 in the image 80 is detected by pattern matching.
- S40 The processing unit 50 determines whether or not the predetermined identification symbol 19 has been recognized. When the predetermined identification symbol 19 is recognized, S50 is executed. If the predetermined identification symbol 19 cannot be recognized, “NG data” is output to the control unit 61 (S90). “NG data” is, for example, standard data output when a predetermined identification symbol 19 cannot be recognized.
- the container 10 to which “NG data” is output is treated as, for example, a container 10 with an unknown model number because the character 18 (model number) is not recognized.
- the processing unit 50 performs an OCR region creation process on the image 80.
- OCR area creation process a predetermined area is created as an OCR area 82 from a position that is a predetermined distance in the horizontal direction from the identification symbol 19.
- the processing unit 50 performs a pattern matching process on the image 80. Prior to the pattern matching process, first, a predetermined process is performed on the image 80. For example, the processing unit 50 performs a process for making the contour of the uneven shape 17 in the image 80 stand out (a process for making the character 18 black), and stores the image 80 after the image processing in a storage unit (not shown). Next, the processing unit 50 performs a process of extracting a black-shaped portion (character 18) from the stored image 80. Then, the processing unit 50 performs a pattern matching process for matching the character 18 in the OCR region 82 with a matching character registered in the processing unit 50 in advance. When the concavo-convex shape 17 includes the character 18, the character 18 can be read from the image 80 captured by the imaging unit 40.
- the processing unit 50 determines whether or not the correlation degree of the character 18 read by the pattern matching process (S60) is higher than a preset threshold value.
- the degree of correlation is the degree of coincidence between the matching character registered in advance in the processing unit 50 and the character 18 read by the pattern matching process. If the degree of correlation is higher than a preset threshold value, the character 18 is read correctly.
- the processing unit 50 outputs the result of the pattern matching process (model number information) to, for example, the control unit 61.
- the control unit 61 further associates the model number information with the information on other inspection results and outputs the information to a higher-level information collection device (not shown).
- the higher-level information collection device collects model number information and information on a plurality of inspection results in association with each other.
- the upper information collection device is, for example, a device that collects information on the entire production line of the container 10.
- the present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects).
- the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced.
- the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object.
- the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.
- rotation detection unit 60 ... motor, 61 ... control unit, 62 ... rotation control unit, 70 ... machine base, 72 ... transport path, 74 ... inspection station, 75 ... transport center axis, 78 ... carry-in port, 79 ... carry-out port, 80 ... image, 81 ... identification region, 82 ... OCR region, ⁇ 1 ... diffusion angle, ⁇ 2 ...angle
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Character Input (AREA)
Abstract
Description
本適用例に係る容器の検査装置は、
容器の外表面に形成された凹凸形状に対し光を照射する発光部と、
容器の中心軸を中心として回転する容器を支持する回転支持部と、
前記発光部の光のうち容器に反射した光をスクリーンに投影する集光レンズと、
前記スクリーンに投影された像を撮像する撮像部と、
を含むことを特徴とする。
本適用例に係る容器の検査装置において、
凹凸形状は、文字を含み、
前記撮像部で撮像した画像から文字を認識する処理部をさらに含むことができる。
本適用例に係る容器の検査装置において、
前記発光部と容器との間に拡散板をさらに含み、
前記拡散板は、前記発光部からの光を拡散させて容器に照射することができる。
本適用例に係る容器の検査装置において、
前記撮像部と前記集光レンズと前記スクリーンと前記発光部とは、1つの基板上に固定されることができる。
本適用例に係る容器の検査装置において、
容器の外表面に形成された凹凸形状は、容器の外表面から突出する文字であることができる。
本適用例に係る容器の検査方法は、
容器の中心軸を中心に容器を回転させ、
発光部から容器の外表面に形成された凹凸形状に向けて光を出射し、
容器からの反射光を集光レンズによってスクリーンに投影し、
前記スクリーンの像を撮像部で撮像することを特徴とする。
本適用例に係る容器の検査装置において、
凹凸形状は、文字を含み、
前記撮像部で撮像された画像から文字を認識することができる。
本適用例に係る容器の検査装置において、
前記発光部の光を拡散板で拡散させて容器の外表面に形成された凹凸形状に照射することができる。
本適用例に係る容器の検査装置において、
前記拡散板は、全体に所定の角度に統一された拡散角を有し、
前記拡散角は、10°~40°であることができる。
図1を用いて容器10の検査装置1の概要について説明する。図1は容器10の検査装置1(以下「検査装置1」という)の平面図である。
図2及び図3を用いて回転支持部30について説明する。図2は発光部20、撮像部40及び容器10の配置を示す検査ユニット2の平面図であり、図3は容器10の検査ユニット2の側面図である。
図2及び図3を用いて検査ユニット2について説明する。
図2~図4を用いて発光部20について説明する。図4は、発光部20及び拡散板22の関係を説明する平面図である。
図2及び図3に示すように、集光レンズ42は、発光部20の光のうち容器10に反射した光をスクリーン44に投影する。集光レンズ42は、発光部20の光のうち容器10の外表面16(凹凸形状17を含む領域)で正反射した光を受光できる位置に配置される。
図2及び図3に示すように、撮像部40は、容器10、集光レンズ42及びスクリーン44を結ぶ延長線上に配置される。撮像部40は、基板48上に固定される。撮像部40は、スクリーン44に投影された容器10の外表面16の凹凸形状17を撮像するように配置される。
処理部50は、撮像部40が胴部13の全周(1.2周以上)を撮像する画像データを受信し、画像データに所定の画像処理を施す。また、処理部50は、画像処理された画像データから所定の検査を実行する。処理部50は、既存の検査装置1に対して追加の構成として取り付けられるため検査装置1の制御部61から独立した筐体に設けられるが、制御部61の一部であってもよい。
図1~図3に示すように、検査装置1の機台70上に基板48が固定されている。
本実施形態に係る容器10の検査方法は、中心軸12を中心として容器10を回転させ、発光部20から容器10の外表面16に形成された凹凸形状17に向けて光を出射し、容器10からの反射光を集光レンズ42によってスクリーン44に投影し、スクリーン44の像を撮像部40で撮像することを特徴とする。この検査方法によれば、反射型の光学系を用いて容器10の外表面16の凹凸形状17を確実に検査することができる。
Claims (9)
- 容器の外表面に形成された凹凸形状に対し光を照射する発光部と、
容器の中心軸を中心として回転する容器を支持する回転支持部と、
前記発光部の光のうち容器に反射した光をスクリーンに投影する集光レンズと、
前記スクリーンに投影された像を撮像する撮像部と、
を含むことを特徴とする、容器の検査装置。 - 請求項1において、
凹凸形状は、文字を含み、
前記撮像部で撮像した画像から文字を認識する処理部をさらに含む、容器の検査装置。 - 請求項1または2において、
前記発光部と容器との間に拡散板をさらに含み、
前記拡散板は、前記発光部からの光を拡散させて容器に照射することを特徴とする、容器の検査装置。 - 請求項1~3のいずれか1項において、
前記撮像部と前記集光レンズと前記スクリーンと前記発光部とは、1つの基板上に固定されていることを特徴とする、容器の検査装置。 - 請求項1~4のいずれか1項において、
容器の外表面に形成された凹凸形状は、容器の外表面から突出する文字であることを特徴とする、容器の検査装置。 - 容器の中心軸を中心として容器を回転させ、
発光部から容器の外表面に形成された凹凸形状に向けて光を出射し、
容器からの反射光を集光レンズによってスクリーンに投影し、
前記スクリーンの像を撮像部で撮像することを特徴とする、容器の検査方法。 - 請求項6において、
凹凸形状は、文字を含み、
前記撮像部で撮像された画像から文字を認識することを特徴とする、容器の検査方法。 - 請求項6または7において、
前記発光部の光を拡散板で拡散させて容器の外表面に形成された凹凸形状に照射することを特徴とする、容器の検査方法。 - 請求項8において、
前記拡散板は、全体に所定の角度に統一された拡散角を有し、
前記拡散角は、10°~40°であることを特徴とする、容器の検査方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201780090027.6A CN110546650B (zh) | 2017-04-26 | 2017-04-26 | 容器的检查装置和容器的检查方法 |
JP2019514967A JP6893242B2 (ja) | 2017-04-26 | 2017-04-26 | 容器の検査装置及び容器の検査方法 |
KR1020197032555A KR102300158B1 (ko) | 2017-04-26 | 2017-04-26 | 용기 검사장치 및 용기 검사방법 |
PCT/JP2017/016616 WO2018198248A1 (ja) | 2017-04-26 | 2017-04-26 | 容器の検査装置及び容器の検査方法 |
PH12019502222A PH12019502222A1 (en) | 2017-04-26 | 2019-09-25 | Inspection device for container and inspection method for container |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2017/016616 WO2018198248A1 (ja) | 2017-04-26 | 2017-04-26 | 容器の検査装置及び容器の検査方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018198248A1 true WO2018198248A1 (ja) | 2018-11-01 |
Family
ID=63919507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/016616 WO2018198248A1 (ja) | 2017-04-26 | 2017-04-26 | 容器の検査装置及び容器の検査方法 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP6893242B2 (ja) |
KR (1) | KR102300158B1 (ja) |
CN (1) | CN110546650B (ja) |
PH (1) | PH12019502222A1 (ja) |
WO (1) | WO2018198248A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110966956A (zh) * | 2019-11-19 | 2020-04-07 | 北京伟景智能科技有限公司 | 一种基于双目视觉的三维检测装置和方法 |
WO2020255498A1 (ja) * | 2019-06-21 | 2020-12-24 | 東洋ガラス株式会社 | ガラスびんの検査方法及びガラスびんの製造方法 |
JP2023500118A (ja) * | 2019-11-05 | 2023-01-04 | シュンク ソノジステム ゲゼルシャフト ミット ベシュレンクテル ハフツング | 統合カメラアセンブリを備えた超音波溶着装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113426705A (zh) * | 2021-08-25 | 2021-09-24 | 江苏圣锦硅业新材料有限公司 | 一种玻璃瓶瓶口裂纹检测设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10240859A (ja) * | 1997-02-28 | 1998-09-11 | Shiga Pref Gov | 透明体の凹凸マーク読み取り装置 |
JP2008158943A (ja) * | 2006-12-26 | 2008-07-10 | Toyo Glass Co Ltd | 透明又は半透明物品エンボス文字の読み取り方法及び装置 |
WO2014050641A1 (ja) * | 2012-09-28 | 2014-04-03 | 日本山村硝子株式会社 | 文字読取装置およびその文字読取装置を用いた容器検査システム |
JP2016500817A (ja) * | 2012-10-18 | 2016-01-14 | エムエスセ エ エスジェセセMsc & Sgcc | 容器の壁厚測定用設備 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55104744A (en) * | 1979-02-06 | 1980-08-11 | Shimadzu Corp | Device for inspecting glass bottle |
JP3371654B2 (ja) * | 1995-10-30 | 2003-01-27 | ソニー株式会社 | 投射型ディスプレイ装置 |
JP2007078821A (ja) * | 2005-09-12 | 2007-03-29 | Casio Comput Co Ltd | 投影装置、投影方法及びプログラム |
DE102009020920A1 (de) * | 2009-05-12 | 2010-11-18 | Krones Ag | Inspektionsvorrichtung zur Erkennung von Embossings und/oder Etiketten auf transparenten Gefäßen, insbesondere Getränkeflaschen |
JP5421763B2 (ja) * | 2009-12-24 | 2014-02-19 | ヤマハ発動機株式会社 | 検査装置および検査方法 |
JP5833413B2 (ja) * | 2011-11-18 | 2015-12-16 | 株式会社エヌテック | 容器の検査装置 |
-
2017
- 2017-04-26 KR KR1020197032555A patent/KR102300158B1/ko active IP Right Grant
- 2017-04-26 WO PCT/JP2017/016616 patent/WO2018198248A1/ja active Application Filing
- 2017-04-26 CN CN201780090027.6A patent/CN110546650B/zh active Active
- 2017-04-26 JP JP2019514967A patent/JP6893242B2/ja active Active
-
2019
- 2019-09-25 PH PH12019502222A patent/PH12019502222A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10240859A (ja) * | 1997-02-28 | 1998-09-11 | Shiga Pref Gov | 透明体の凹凸マーク読み取り装置 |
JP2008158943A (ja) * | 2006-12-26 | 2008-07-10 | Toyo Glass Co Ltd | 透明又は半透明物品エンボス文字の読み取り方法及び装置 |
WO2014050641A1 (ja) * | 2012-09-28 | 2014-04-03 | 日本山村硝子株式会社 | 文字読取装置およびその文字読取装置を用いた容器検査システム |
JP2016500817A (ja) * | 2012-10-18 | 2016-01-14 | エムエスセ エ エスジェセセMsc & Sgcc | 容器の壁厚測定用設備 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020255498A1 (ja) * | 2019-06-21 | 2020-12-24 | 東洋ガラス株式会社 | ガラスびんの検査方法及びガラスびんの製造方法 |
JP2021001793A (ja) * | 2019-06-21 | 2021-01-07 | 東洋ガラス株式会社 | ガラスびんの検査方法及びガラスびんの製造方法 |
KR20210002528A (ko) * | 2019-06-21 | 2021-01-08 | 도요 가라스 가부시키가이샤 | 유리병 검사방법 및 유리병 제조방법 |
CN112492887A (zh) * | 2019-06-21 | 2021-03-12 | 东洋玻璃株式会社 | 玻璃瓶的检查方法和玻璃瓶的制造方法 |
JP7220128B2 (ja) | 2019-06-21 | 2023-02-09 | 東洋ガラス株式会社 | ガラスびんの検査方法及びガラスびんの製造方法 |
KR102540808B1 (ko) * | 2019-06-21 | 2023-06-12 | 도요 가라스 가부시키가이샤 | 유리병 검사방법 및 유리병 제조방법 |
JP2023500118A (ja) * | 2019-11-05 | 2023-01-04 | シュンク ソノジステム ゲゼルシャフト ミット ベシュレンクテル ハフツング | 統合カメラアセンブリを備えた超音波溶着装置 |
CN110966956A (zh) * | 2019-11-19 | 2020-04-07 | 北京伟景智能科技有限公司 | 一种基于双目视觉的三维检测装置和方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20190134732A (ko) | 2019-12-04 |
JPWO2018198248A1 (ja) | 2020-03-05 |
KR102300158B1 (ko) | 2021-09-10 |
PH12019502222A1 (en) | 2020-07-06 |
CN110546650A (zh) | 2019-12-06 |
JP6893242B2 (ja) | 2021-06-23 |
CN110546650B (zh) | 2023-05-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2018198248A1 (ja) | 容器の検査装置及び容器の検査方法 | |
US7295948B2 (en) | Laser system for marking tires | |
US8477185B2 (en) | System for the angular orientation and detection of containers in labelling machines | |
EP1560017B1 (en) | Glass bottle inspection device | |
JPS62184908A (ja) | タイヤの自動判別方法 | |
CN109844505B (zh) | 玻璃容器的烧伤检查装置 | |
JPH11108643A (ja) | 容器密封面領域検査方法及び装置 | |
US10713520B2 (en) | Method of taking a picture without glare | |
JP2010107254A (ja) | Ledチップ検査装置、ledチップ検査方法 | |
WO2014050641A1 (ja) | 文字読取装置およびその文字読取装置を用いた容器検査システム | |
JP7382519B2 (ja) | ガラスびんの検査方法及びガラスびんの製造方法並びにガラスびんの検査装置 | |
JPH0797087B2 (ja) | 容器割目の検査 | |
JPH0962831A (ja) | 撮像装置および照明装置 | |
US6795176B1 (en) | Container inspection machine | |
JP4444273B2 (ja) | 透明又は半透明物品エンボス文字の読み取り方法及び装置 | |
JP2012150072A (ja) | 透明容器口部の刻印検査 | |
KR102627123B1 (ko) | 이물 검사 장치 | |
JP3986534B2 (ja) | 空瓶の検査システム | |
JP6073261B2 (ja) | びん底検査装置 | |
JP2012137324A (ja) | 液面浮遊異物検査方法及び装置 | |
JP5651084B2 (ja) | 異物検査装置 | |
JPH0961374A (ja) | 表示体検査方法及び表示体検査装置 | |
JP2022099875A (ja) | 検査装置 | |
JPH11248644A (ja) | 容器の欠陥検査方法及びその装置 | |
CN118019971A (en) | Bottom inspection device for glass bottle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17907341 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2019514967 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20197032555 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 17907341 Country of ref document: EP Kind code of ref document: A1 |