WO2018061196A1 - ガラス容器の焼傷検査装置 - Google Patents
ガラス容器の焼傷検査装置 Download PDFInfo
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- WO2018061196A1 WO2018061196A1 PCT/JP2016/079097 JP2016079097W WO2018061196A1 WO 2018061196 A1 WO2018061196 A1 WO 2018061196A1 JP 2016079097 W JP2016079097 W JP 2016079097W WO 2018061196 A1 WO2018061196 A1 WO 2018061196A1
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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
- G01N21/8806—Specially adapted optical and illumination features
Definitions
- the present invention relates to a burner inspection apparatus for glass containers that optically inspects defects called burns that occur in the molding process of glass containers.
- Glass containers such as glass bottles and glass tableware are molded by putting gob (a lump of molten glass) into a rough mold and blowing or pressing to form a parison, then transferring it to a finishing mold and blowing it. Is done. If there is a scratch or wrinkle on the gob cut out from the orifice, it remains as a streak-like groove in a glass container formed with a finishing die, which is a defect called burn.
- gob a lump of molten glass
- the finishing mold in the molding process of the glass container is a split mold
- a slight level difference on the mating surface of the split mold is formed on the container surface as a joint line.
- the seam line appears linearly in the longitudinal direction of the glass container.
- An object of the present invention is to provide a burn inspection apparatus for a glass container that can more accurately detect the presence or absence of burns while accurately distinguishing between burns and joint lines.
- 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 burn inspection device for glass containers is A light emitting part for illuminating the container; A rotation support for supporting the container while rotating the container around the axis of the container; An imaging unit disposed opposite to the light emitting unit across a container; A determination unit that determines the presence or absence of a defect based on a first image of the container surface in the first imaging region captured by the imaging unit and a second image of the container surface in the second imaging region; Including The second image is an image of a container surface corresponding to the first image;
- the first imaging region is a part of the container surface on the right side when viewed from the imaging unit with respect to a reference line connecting the imaging unit and the axis,
- the second imaging region is a part of the container surface on the left side when viewed from the imaging unit with respect to the reference line,
- the first imaging area and the second imaging area are each set at 1 to 10 degrees around the axis.
- the glass container burn inspection apparatus can more accurately detect the presence or absence of burns while accurately distinguishing between burns and seams.
- the first imaging area is set in an area in a range of 15 degrees to 60 degrees when the reference line is set to 0 degrees around the axis line on the right side from the reference line
- the second imaging region may be set in a region in a range of 15 degrees to 60 degrees when the reference line is set to 0 degrees around the axis line on the left side from the reference line.
- the glass container burn inspection apparatus according to this application example can more accurately detect the presence or absence of burns.
- a through-hole provided between the light-emitting unit and the container supported by the rotation support unit, through which a part of light from the light-emitting unit passes;
- a light-shielding part that is provided on both sides of the through-hole in a cross section perpendicular to the axis, and blocks a part of light from the light-emitting part;
- the width of the through hole is not less than the width of the container and does not exceed a range obtained by adding 30 mm to the width of the container.
- the glass container burn inspection apparatus according to this application example can more accurately detect the presence or absence of burns.
- a control unit that emits light from a light emitting region that is a part of the light emitting unit;
- the rotation support unit rotates the container around the axis and conveys the container along the conveyance direction,
- the control unit sets the width of the light emitting region in a cross section orthogonal to the axis to be equal to or larger than the width of the container and does not exceed a range obtained by adding 30 mm to the width of the container.
- the container can be moved following the container conveyed in the conveying direction.
- the glass container burn inspection apparatus according to this application example can more accurately detect the presence or absence of burns.
- the present invention can provide a glass container burn inspection apparatus that can more accurately detect the presence or absence of burns while accurately distinguishing between burns and joint lines.
- FIG. 1 is a plan view of a burn inspection apparatus.
- FIG. 2 is a side view of the burn inspection apparatus.
- FIG. 3 is a front view of the burn inspection apparatus for explaining the relationship between the light shielding portion and the container.
- FIG. 4 is a front view of the container for explaining the first imaging region and the second imaging region.
- FIG. 5 is a diagram comparing the first image and the second image.
- FIG. 6 is a flowchart for explaining an inspection method using a burn inspection apparatus.
- FIG. 7 is a plan view of a burn inspection apparatus according to a modification.
- FIG. 8 is a front view of a burn inspection apparatus according to a modification for explaining the movement of the light emitting region.
- FIG. 9 is a front view of a burn inspection apparatus according to a modification for explaining the movement of the light emitting region.
- the glass container burn inspection apparatus includes a light emitting unit that illuminates the container, a rotation support unit that supports the container while rotating the container around the axis of the container, and the light emitting unit that faces the light emitting unit across the container. And determining the presence / absence of a defect based on a first image of the container surface in the first imaging region and a second image of the container surface in the second imaging region captured by the imaging unit.
- the second image is an image of the container surface corresponding to the first image
- the first imaging region is the imaging unit with respect to a reference line connecting the imaging unit and the axis
- the second imaging region is a part of the container surface on the left side when viewed from the imaging unit with respect to the reference line, and the first imaging region and Each of the second imaging areas is 1 to 10 degrees around the axis. Characterized in that it is set.
- FIG. 1 is a plan view of the burn inspection apparatus 1
- FIG. 2 is a side view of the burn inspection apparatus 1
- FIG. 3 is a burn inspection apparatus 1 for explaining the relationship between the light shielding portion 81 and the container 10.
- FIG. 1 is a plan view of the burn inspection apparatus 1
- FIG. 2 is a side view of the burn inspection apparatus 1
- FIG. 3 is a burn inspection apparatus 1 for explaining the relationship between the light shielding portion 81 and the container 10.
- the burn inspection apparatus 1 includes a light emitting unit 20 that illuminates the container 10 and a rotation support unit (30, 32) that supports the container 10 while rotating the container 10 around the axis 12 of the container 10. And an imaging unit 40 disposed opposite the light emitting unit 20 with the container 10 interposed therebetween, and a determination unit 52 that determines the presence or absence of a defect based on the image of the container surface 14 captured by the imaging unit 40.
- the container 10 is made of glass and is transparent or translucent. Semi-transparency is a degree of transparency that allows burns to be determined by light from the light emitting unit 20 that has passed through the container 10.
- the container 10 has a circular cross section.
- the cross-sectional shape of the container 10 may be a polygon.
- the axis 12 is an imaginary line indicating the rotation center axis around which the container 10 supported by the first rotation support part 30 and the second rotation support part 32 rotates.
- the axis 12 coincides with the center of the circle formed by the container surface 14 in the cross section of the container 10.
- the burn inspection apparatus 1 uses the light transmitted through the container 10 to image the container surface 14 with the imaging unit 40, and a portion appearing in black in the captured image is a detection body (in this embodiment, “dark line”). It is a light transmission type burn inspection apparatus 1 that is detected as a portion recognized as “. In burns, the light from the light emitting unit 20 is randomly reflected or refracted, and the amount of light reaching the imaging unit 40 is extremely small compared to other parts (the container surface 14 without the detection body). For this reason, the burned portion becomes darker than the other portions, and appears as black burn on the white container surface 14 in the image. Details of the burn will be described later.
- the reference line 41 is a virtual line connecting the imaging unit 40 and the axis 12.
- the imaging unit 40 can image the container 10 around the reference line 41. 1 and 2, the imaging unit 40 represents the camera body, so the reference line 41 coincides with the optical axis of the camera from the imaging unit 40 toward the axis 12 of the container 10. Since the imaging unit 40 is fixed at a predetermined position, the reference line 41 is always at the same position even when the container 10 is not conveyed. In addition, when the imaging part 40 follows according to the movement of the container 10 like the modification mentioned later, the reference line 41 will also move.
- the container 10 determined to be non-defective by the determination unit 52 is transported to the next inspection process (not shown), for example.
- the container 10 determined to be defective by the determination unit 52 is discharged to the outside of the burn inspection apparatus 1 from, for example, a discharge unit (not shown).
- FIG. 4 is a front view of the container 10 for explaining the first imaging region 60 and the second imaging region 62. Details of the first imaging region 60 and the second imaging region 62 will be described later.
- the burn inspection apparatus 1 must be able to determine that the joint line 16 is not the burn 18. This is because the seam line 16 is present in almost all containers 10 and does not substantially affect the quality of the containers 10.
- the joint line 16 is a step formed on the surface 14 of the container due to the finish of the finishing mold in the forming process of the container 10.
- the seam line 16 has a steep slope on one side and a gentle slope on the other side, and is bilaterally asymmetric and directional. For this reason, when the seam line 16 is on the left side of the reference line 41 and when it is on the right side, reflection and refraction of light from the light emitting unit 20 are different.
- the first imaging area 60 becomes a dark line and becomes a detection body, but when moving to the second imaging area 62, the imaging unit 40 cannot recognize the detection body.
- the burn 18 has a groove shape with a V-shaped cross section, and its slope is not smooth but uneven. For this reason, the light from the light emitting unit 20 is randomly reflected and refracted by the burn 18, and the burn 18 reaches the imaging unit 40 from any portion (left side or right side) of the container 10. Light is extremely reduced, and the burn 18 becomes a detection body in the image captured by the imaging unit 40. Further, although the burn 18 extends in the direction along the axis 12 of the container 10, the burn 18 similarly becomes a detection body in the image even in the horizontal direction or the inclined burn 18. In the example illustrated in FIG. 4, the detection object of the burn 18 appears in the first imaging region 60 and the second imaging region 62 and is imaged by the imaging unit 40.
- the determination unit 52 compares the left image of the first imaging region 60 and the right image of the second imaging region 62 imaged by the imaging unit 40. It can be determined that there is a detection object, and when there is a detection object on only one of them, it can be determined that the joint line 16 is present.
- the light emitting unit 20 is a light source that illuminates the container 10.
- the light emitting unit 20 is a surface light source that can illuminate the container 10 from the opposite side of the imaging unit 40.
- the light emitting unit 20 is set to a size that can illuminate the entire largest container 10 that is scheduled to be inspected by the burn inspection apparatus 1.
- the light emitting unit 20 has a rectangular shape on the front side on the container 10 side, and almost the entire front surface is a light emitting surface.
- the light emitting unit 20 faces the container 10 and the imaging unit 40 and is arranged so that light transmitted through the container 10 reaches the imaging unit 40.
- the light source of the light emitting unit 20 a known light source such as an LED or an organic EL can be used.
- the light emitting unit 20 is a diffuse illumination, and when an LED is used, the container 10 can be irradiated with uniform light using a diffusion plate on the front surface of the light source.
- a diffusion plate a known plate that diffuses light from a light source such as an LED and emits the light to the outside can be used. When light is diffused by the diffusion plate, unevenness with a portion where no light source exists can be reduced when a large number of light sources are used.
- the light emitting unit 20 may be capable of partially emitting light. For example, when LEDs are used, since the light emitting unit 20 has a large number of LEDs arranged on the entire surface of the light emitting unit 20, light can be emitted for each LED or a set of a plurality of LEDs in a partial region. It is good. By doing in this way, the area
- the light shielding plate 80 is disposed between the light emitting part 20 and the container 10 supported by the first rotation support part 30.
- the light shielding plate 80 includes a through hole 82 and a light shielding portion 81.
- the through hole 82 is provided between the light emitting unit 20 and the container 10 supported by the first rotation support unit 30 and illuminates the container 10 through a part of the light from the light emitting unit 20.
- the light shielding portions are provided on both sides of the through hole 82 in the cross section orthogonal to the axis 12 and shield a part of the light from the light emitting portion 20.
- the light shielding unit 81 is for irradiating the container 10 with only a predetermined range of light in the light emitting unit 20.
- the light that has passed through the through-hole 82 is irradiated on the surface of the container 10 opposite to the imaging unit 40, and the light that has not been transmitted through the through-hole 82 does not reach the container 10.
- the outer shape of the light shielding part 81 has the same size as the light emitting part 20, for example, and the through hole 82 is formed in a similar shape, for example, according to the outer shape line when the container 10 is viewed from the front.
- the width D1 of the through-hole 82 is not less than the width D2 of the container 10 and does not exceed the range obtained by adding 30 mm to the width D2 of the container 10. It is desirable. This is to detect the presence or absence of the burn 18 more accurately. If the width D1 is equal to or greater than the width D2, light can be sufficiently irradiated over the entire width of the container 10, so that dark portions due to uneven thickness distribution near both ends in the width direction of the container 10 can be reduced. If the width D1 is equal to or less than the width D2 + 30 mm, the burn 18 is not whitened in the first imaging target area 70 and the second imaging target area 72. That is, the burn 18 can be clearly imaged as a detection body.
- the height of the light shielding part 81 is preferably the same as or slightly higher than the height of the part to be photographed, for example, the trunk part.
- the light emission part 20 can be made to light-emit partially according to the shape of the container 10 like the modification mentioned later, the light-shielding part 81 does not need to be provided.
- Rotation Support Unit As illustrated in FIGS. 2 and 3, the rotation support units (30, 32) support the container 10 while rotating the container 10 around the axis 12 in the rotation direction R.
- the rotation support portions (30, 32) include a first rotation support portion 30 and a second rotation support portion 32.
- the first rotation support part 30 is a cylindrical member below the container 10, and the bottom part of the container 10 is placed on the upper surface of the first rotation support part 30 and rotates around the axis 12.
- the 1st rotation support part 30 has a drive device which is not illustrated in the lower part. An electric motor or the like can be used as the drive device.
- the first rotation support unit 30 rotates a predetermined amount when the container 10 to be inspected is conveyed on the reference line 41 of the imaging unit 40.
- the predetermined amount of rotation is an amount necessary for the entire circumference of the container 10 to be imaged in two imaging regions on the right side and the left side with respect to the reference line 41.
- the predetermined amount of rotation is one or more rotations. For example, when the left and right images are shifted and compared as described later with reference to FIG.
- the rotation amount of the first rotation support unit 30 is calculated by the control unit 50 based on the output of the rotation detection unit 54 shown in FIG.
- the rotation detection unit 54 may be a rotary encoder attached directly or indirectly to the drive device of the first rotation support unit 30.
- the second rotation support portion 32 is a cylindrical member above the container 10, and the lower surface thereof is placed on the mouth of the container 10 and rotates with the rotation of the container 10 about the axis 12.
- the 2nd rotation support part 32 does not have a drive device.
- the second rotation support part 32 supports the container 10 so as to be sandwiched from above and below together with the first rotation support part 30, thereby preventing the container 10 from swinging or falling due to rotation.
- the position of the container 10 in FIG. 1 is the inspection position in the burn inspection apparatus 1.
- the container 10 supported by the first rotation support unit 30 and the second rotation support unit 32 is transported to the reference line 41 that is the inspection position, the container 10 stops at the inspection position and rotates about one or more rotations about the axis 12. To do.
- the container 10 is unloaded from the inspection position while being supported by the first rotation support portion 30.
- the container 10 is supported intermittently by the first rotation support unit 30 and the second rotation support unit 32.
- Imaging Unit 40 As shown in FIGS. 1 and 2, the imaging unit 40 is arranged to face the light emitting unit 20 with the container 10 interposed therebetween. The imaging unit 40 is disposed on a reference line 41 that passes through the axis 12 of the container 10. The imaging unit 40 can image at least a portion to be inspected of the container 10, and is arranged here so that the entire body of the container 10 falls within the field of view of the imaging unit 40.
- the imaging unit 40 can capture an image that allows the burn 18 to be determined by the light of the light emitting unit 20 that has passed through the container 10.
- the imaging unit 40 can use a known area sensor.
- As the area sensor a CCD image sensor, a CMOS image sensor, or the like can be used.
- the imaging unit 40 is on the left side when viewed from the imaging unit 40 with respect to the reference line 41 and the first imaging region 60 that is a part of the container surface 14 on the right side when viewed from the imaging unit 40.
- the second imaging region 62 that is a part of the container surface 14 is imaged. This is for discriminating between the burn 18 and the joint line 16.
- the imaging unit 40 images the entire front surface of the container 10 including the first imaging region 60 and the second imaging region 62, and the image processing unit 53 corresponds to the first imaging region 60 and the second imaging region 62 from the image. May be cut out as a first image 100 and a second image 102 (described later with reference to FIG. 5).
- the first imaging area 60 and the second imaging area 62 are each set to 1 to 10 degrees around the axis 12.
- the set angle ⁇ 1 of the first shooting area 60 and the second shooting area 62 is set to the same angle (width).
- the container 10 having a cylindrical body having a diameter of 34 mm to 206 mm if it is 10 degrees or less, the largest portion is a burn 18 having a depth of 0.05 mm or more and a length of 2.5 mm or more and the surface Bubbles can be recognized, and if it is 1 or more, it can be determined whether or not burns 18 are present in the image.
- the setting angle ⁇ 1 of the first imaging region 60 and the second imaging region 62 can be set to about 6.6 degrees, for example, and in this case, the container 10 rotates about 6.6 degrees. Each time it is taken, at least 65 shots are taken. As will be described later with reference to FIG. 5, the position of the first image in the first shooting area 60 and the position of the first image in the second shooting area 62 are misaligned. .
- the timing at which the imaging unit 40 captures an image is determined by the control unit 50 issuing a command to the imaging unit 40 based on rotation angle data (pulse signal) from the rotation detection unit 54 that detects the rotation of the first rotation support unit 30. .
- the first imaging region 60 is located in the first imaging target region 70 in the range of 15 to 60 degrees when the reference line 41 is set to 0 degrees around the axis 12 on the right side from the reference line 41.
- the second imaging region 62 is set within the second imaging target region 72 in the range of 15 to 60 degrees when the reference line 41 is set to 0 degrees with the axis 12 on the left side from the reference line 41.
- the setting angle of the first imaging target region 70 is preferably set such that the angle ⁇ 2 from the reference line 41 is 15 degrees or more and the angle ⁇ 3 from the reference line 41 is 60 degrees or less.
- the setting angle of the second imaging target region 72 is preferably such that the angle ⁇ 4 from the reference line 41 is 15 degrees or more and the angle ⁇ 5 from the reference line 41 is 60 degrees or less. This is because the burn 18 may not appear as a detection object in an area smaller than 15 degrees (a range indicated by hatching from the reference line 41 to ⁇ 2 ( ⁇ 4) in FIG. 1). In addition, in a region larger than 60 degrees (a range indicated by hatching from ⁇ 3 ( ⁇ 5) to 90 degrees in FIG. 1), a shadow due to uneven thickness of the container 10 may be erroneously recognized as a burn 18. is there.
- the first imaging region 60 and the second imaging region 62 are set around a position of 36 degrees to the left and right from the reference line 41. As shown in FIG.
- Determination Unit As illustrated in FIGS. 1 and 2, the determination unit 52 is a part of the control unit 50. Therefore, the control unit 50 instructs the subsequent processing of the inspected container 10 based on the determination result of the determination unit 52.
- the determination unit 52 may be provided separately from the control unit 50. In that case, the determination result of the determination unit 52 is notified to the control unit 50.
- FIG. 5 is a diagram comparing the first image 100 and the second image 102.
- the determination unit 52 includes the first image 100 of the container surface 14 in the first imaging region 60 captured by the imaging unit 40 and the second of the container surface 14 in the second imaging region 62. The presence or absence of a defect is determined based on the image 102.
- the second image 102 to be compared by the determination unit 52 is an image of the container surface 14 corresponding to the first image 100. That is, the second image 102 is captured when the target portion of the container surface 14 in the first image 100 captured in the first imaging region 60 rotates and comes to the second imaging region 62.
- the first image 100 and the second image 102 are images of the same container surface 14 portion.
- the image processing unit 53 includes the first image 100 and the second image 102 corresponding to the first imaging region 60 and the second imaging region 62 from the entire front image of the container 10 captured by the imaging unit 40. Cut out as.
- FIG. 5 shows that only the first image 100 cut out by the image processing unit 53 is arranged side by side for the entire circumference of the container surface 14, and below that, only the second image 102 processed similarly is displayed on the container surface 14. They are arranged so that the same parts are arranged one above the other. Specifically, since the first image capturing area 60 and the second image capturing area 62 are simultaneously imaged after performing the density extraction process on the first image 100 and the second image 102, the first image capturing area 60 and the second image capturing area The first image 100 is shifted and arranged as indicated by an arrow by the amount of deviation from the imaging region 62.
- the light and shade extraction process is a known image processing method, and is an image process that extracts a portion having a large luminance difference.
- the coordinates of the detection body of each image may be calculated by performing a labeling process on the first image 100 and the second image 102. This is because an accurate determination can be made by matching the coordinates of the detection object.
- the joint line 16 and the burn 18 appear as the detection body, but only the burn 18 appears as the detection body in the corresponding second image 102.
- the determination unit 52 determines that there is a defect (burn burn 18) in this portion, and determines that it is a defective product.
- burn burn 18 the joint line 16 and the burn 18 are described so as to be within the same image. However, if there is a detection body at the same position above and below in FIG. ), And if there is a detection body only in one of the upper and lower positions, the determination unit 52 does not determine that the defect is a defect (burn 18).
- the determination unit 52 determines a detection body having a predetermined brightness or less common to the first image 100 and the second image 102 as a defect (burn burn 18). Moreover, the determination part 52 can also determine the black part more than predetermined length and the predetermined area in the 1st image 100 as a fault (burn 18). According to the burn inspection apparatus 1 according to the present embodiment, the size of the burn 18 that can be determined as compared with the apparatus described in Japanese Patent No. 4886830 can be reduced to about 1/10.
- the control unit 50 is a CPU having a storage unit. By the control unit 50, the burn inspection apparatus 1 performs a process of intermittently transporting the container 10 at predetermined time intervals and a process of inspecting the container 10.
- the determination unit 52 and the image processing unit 53 may be provided separately from the control unit 50. This is because the determination unit 52, the image processing unit 53, and the like can be added to the existing inspection apparatus having the control unit 50.
- the determination unit 52 inspects the burn 18 for the presence or absence of defects
- the present invention is not limited to this, and for example, it is possible to target bubbles and foreign matters. This is because any of them appears as a black spot on the image, so that it can be determined as a defect similarly to the burn 18.
- FIG. 6 is a flowchart for explaining an inspection method using the burn inspection apparatus 1.
- the control unit 50 instructs the imaging unit 40 to start imaging.
- the imaging unit 40 calculates the rotation angle of the container 10 based on the output from the rotation detection unit 54 in accordance with an instruction from the control unit 50, and sets the first imaging region 60 and the second imaging region 62 (for example, 6 degrees). Every time, the entire circumference of the container surface 14 is photographed.
- the control unit 50 instructs the image processing unit 53 to cut out the first image 100 and the second image 102 and store them in a storage unit (not shown).
- the image processing unit 53 stores the first image 100 and the second image 102 for one round of the container 10.
- the control unit 50 causes the determination unit 52 to determine the presence or absence of defects in the stored first image 100 and second image 102. As a result of the determination, if there is no detection object in any of the images, S22 is executed. If the result of determination is that there is a detection object in any of the images, S18 is executed.
- the control unit 50 causes the determination unit 52 to determine whether or not there are detection bodies in both the stored first image 100 and second image 102. As a result of the determination, if there is no detection object in any of the images, S22 is executed. This is because the detection body appearing in one image is considered to be the joint line 16. If any image has a detection object as a result of the determination, it is determined that there is a defect, and S20 is executed. This is because it is considered that the detection body is not the joint line 16 but the burn 18.
- the control unit 50 treats the container 10 to be inspected as a defective product.
- the defective container 10 is discharged from a discharge unit (not shown) provided in the conveyance path on the downstream side of the burn inspection apparatus 1.
- the control unit 50 processes the container 10 to be inspected as a non-defective product. For example, inspection and packing of the next process (not shown) provided in the conveyance path on the downstream side of the burn inspection apparatus 1 are performed.
- the processing of S12 to S18 is executed by the determination unit 52, and the control unit 50 is notified of the determination result of the determination unit 52, thereby controlling the control unit 50.
- the unit 50 executes S20 and S22.
- FIG. 7 is a plan view of the burn inspection apparatus 2 according to the modification
- FIG. 8 is a front view of the burn inspection apparatus 2 according to the modification for explaining the movement of the light emitting region 22.
- FIG. 7 is a plan view of the burn inspection apparatus 2 according to the modification
- FIG. 8 is a front view of the burn inspection apparatus 2 according to the modification for explaining the movement of the light emitting region 22.
- FIG. 7 is a plan view of the burn inspection apparatus 2 according to the modification
- FIG. 8 is a front view of the burn inspection apparatus 2 according to the modification for explaining the movement of the light emitting region 22.
- These are the front views of the burn inspection apparatus 2 which concerns on the modification for demonstrating the movement of the light emission area
- the configuration having the same function as in FIGS. 1 to 3 will be described using the same name and the same reference numeral, and detailed description thereof will be omitted.
- the burn inspection device 2 includes three annular transfer devices (a first transfer device 90, a second transfer device 92, and a third transfer device 96).
- the 1st conveyance apparatus 90, the 2nd conveyance apparatus 92, and the 3rd conveyance apparatus 96 convey the container 10 continuously, and do not stop in an inspection position like the burn inspection apparatus 1 mentioned above.
- the first transport device 90 sequentially feeds the containers 10 to the second transport device 92, and the third transport device 96 sequentially takes out the containers 10 that have been inspected from the second transport device 92 and transports them to the next process.
- the second transport device 92 transports the container 10 while being rotatably supported about the axis 12 by the same mechanism as the first rotation support unit 30 and the second rotation support unit 32 shown in FIG. Accordingly, the container 10 rotates around the axis 12 while revolving around the outer periphery of the second transport device 92.
- the second transport device 92 revolves the container 10 by transmitting the driving force of the revolving drive device 95 to the rotating shaft 93 via the belt 94.
- the belt 94 and the revolution drive device 95 are arranged in the machine base of the burn inspection device 2.
- the revolution drive device 95 is provided with a first rotation detection unit 54 a directly or indirectly, detects the movement angle of the container 10 on the conveyance path, and outputs it to the control unit 50.
- the second transport device 92 rotates the container 10 by rotating the belt 35 stretched between the rotation driving device 34 and the pulley 36 along the transport path.
- the belt 35, the rotation driving device 34, and the like are disposed in the machine base of the burn inspection device 2.
- the belt 35 is directly or indirectly connected to the first rotation support portion 30 that supports the container 10, and the driving force of the rotation driving device 34 is transmitted to the belt 35.
- the second rotation detector 54b is in contact with the belt 35, and the rotation angle of the container 10 by the rotation driving device 34 can be detected.
- the first rotation detection unit 54a and the second rotation detection unit 54b only need to be capable of detecting the amount of rotation, and are, for example, rotary encoders.
- the imaging unit 40 includes a camera 42 and a tracking mirror 44.
- the tracking mirror 44 is for photographing the container 10 following the movement of the container 10.
- the camera 42 provided with the tracking mirror 44 is disclosed in Japanese Patent Application Laid-Open No. 2004-279222.
- the tracking mirror 44 rotates following the container 10 conveyed on the outer periphery of the second conveying device 92 by a motor (not shown).
- a reference line 41 (which coincides with the optical axis of the camera) connecting the axis 12 and the imaging unit 40 by this rotation follows the movement of the container 10 by the rotation of the tracking mirror 44.
- the swing angle of the tracking mirror 44 is calculated based on the output of the first rotation detection unit 54a so that the control unit 50 can predict the next shooting position and image the container 10 at the predicted shooting position. .
- the controller 50 drives the motor of the tracking mirror 44.
- the camera 42 images the container 10 at the predicted imaging position of the container 10.
- the imaging unit 40 images the first imaging region 60 and the second imaging region 62 as in the embodiment of FIGS.
- the captured first image 100 and second image 102 are processed by the image processing unit 53 in the same manner as in the embodiment of FIGS.
- the rotation angle of the container 10 that determines the timing for imaging must be calculated with respect to the reference line 41 by the rotation angle by rotation and the movement by revolution.
- the control unit 50 calculates the rotation angle of the container 10 based on the outputs of the first rotation detection unit 54a and the second rotation detection unit 54b.
- the light emitting unit 20 causes the control unit 50 to emit light in the light emitting region 22 that is a part of the light emitting unit 20.
- the first rotation support unit 30 and the second rotation support unit 32 (see FIG. 2) rotate the container 10 around the axis 12 and transport the container 10 along the transport direction of the second transport device 92.
- the control unit 50 sets the width D3 of the light emitting region 22 to be equal to or greater than the width D2 of the container 10 in the cross section orthogonal to the axis 12, and does not exceed the range obtained by adding 30 mm to the width D2 of the container 10.
- the light emitting area 22 is moved following the container 10 being conveyed in the conveying direction. Thus, even when the container 10 moves during the inspection, the presence or absence of the burn 18 can be detected more accurately by causing the light emitting region 22 to follow the movement of the container 10.
- the light emitting region 22 will be described with reference to FIGS.
- the light emitting unit 20 is a surface light emitting device, and is disposed with the light emitting surface facing a conveyance path through which the container 10 is conveyed.
- the light emitting unit 20 can partially emit light according to a command from the control unit 50.
- the light emitting unit 20 can have a number of LEDs arranged vertically and horizontally at a predetermined interval, and can emit light for each column in accordance with a command from the control unit 50.
- the width D3 is equal to or greater than the width D2
- light can be sufficiently irradiated over the entire width of the container 10, so that dark portions due to uneven thickness distribution near both ends in the width direction of the container 10 can be reduced.
- the width D3 is equal to or less than the width D2 + 30 mm, the burn 18 is not whitened in the first imaging target area 70 and the second imaging target area 72 (see FIG. 1).
- the light emitting unit 20 causes only the light emitting region 22 to emit light according to the width D2 of the container 10,
- the dark portion 24 is formed without emitting light in the range. And the light emission area
- the movement of the light emitting area 22 and the dark part 24 is performed by stopping the light emission and the issuance for each column or multiple columns of the LED columns.
- the movement of the light emitting region 22 can be sequentially performed, for example, every 4 mm to 20 mm.
- the light emitting region 22 is sequentially performed along the transport direction every 10 mm that is the pitch of the LED columns.
- Example 1 has a through hole width D1 of 100 mm
- Comparative Example 1 has a through hole width D2 of 120 mm, an internal volume of 500 ml, and a container width D2 was detected on the container 10 having a diameter of 72.2 mm.
- Example 1 it was possible to detect up to a burn 18 having a step depth of 0.05 mm.
- detection of burn 18 was unstable even in the same container.
- Example 2 sets the width D3 of the light emitting region to 100 mm
- Comparative Example 2 sets the width D3 of the light emitting region to 120 mm, and has an internal capacity of 500 ml.
- the burn 18 was detected for the container 10 having a width D2 of 72.2 mm.
- Example 2 it was possible to detect up to a burn 18 having a step depth of 0.05 mm.
- detection of burn 18 was unstable even in the same container.
- 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.
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Abstract
Description
本適用例に係るガラス容器の焼傷検査装置は、
容器を照らす発光部と、
容器を当該容器の軸線の周りに回転させながら支持する回転支持部と、
容器を挟んで前記発光部と対向して配された撮像部と、
前記撮像部で撮像した第1撮影領域にある容器表面の第1画像と第2撮影領域にある容器表面の第2画像とに基づいて欠点の有無を判定する判定部と、
を含み、
前記第2画像は、前記第1画像に対応する容器表面の画像であり、
前記第1撮影領域は、前記撮像部と前記軸線とを結ぶ基準線に対して前記撮像部から見て右側にある容器表面の一部であり、
前記第2撮影領域は、前記基準線に対して前記撮像部から見て左側にある容器表面の一部であり、
前記第1撮影領域及び前記第2撮影領域は、それぞれ前記軸線を中心として1度~10度に設定されることを特徴とする。
本適用例に係るガラス容器の焼傷検査装置において、
前記第1撮影領域は、前記基準線から右側に前記軸線を中心として前記基準線を0度とした場合に15度~60度の範囲の領域内に設定され、
前記第2撮影領域は、前記基準線から左側に前記軸線を中心として前記基準線を0度とした場合に15度~60度の範囲の領域内に設定されることができる。
本適用例に係るガラス容器の焼傷検査装置において、
前記発光部と前記回転支持部に支持された容器との間に設けられ、前記発光部からの光の一部を通す貫通孔と、
前記軸線に直交する横断面における前記貫通孔の両側に設けられ、前記発光部からの光の一部を遮る遮光部と、
をさらに含み、
前記横断面において、前記貫通孔の幅は、容器の幅以上であって、かつ、容器の幅に30mmを足した範囲を超えないことができる。
本適用例に係るガラス容器の焼傷検査装置において、
前記発光部の一部である発光領域を発光させる制御部をさらに含み、
前記回転支持部は、前記軸線の周りに容器を回転させると共に、容器を搬送方向に沿って搬送し、
前記制御部は、前記軸線に直交する横断面において前記発光領域の幅を容器の幅以上であって、かつ、容器の幅に30mmを足した範囲を超えないように設定し、前記発光領域を前記搬送方向に搬送される容器に追従して移動させることができる。
図1~図3を用いてガラス容器(以下単に「容器10」という)の焼傷検査装置1の概要について説明する。図1は焼傷検査装置1の平面図であり、図2は焼傷検査装置1の側面図であり、図3は遮光部81と容器10との関係を説明するための焼傷検査装置1の正面図である。
図4を用いて合わせ目線16と焼傷18について説明する。図4は、第1撮影領域60と第2撮影領域62とを説明するための容器10の正面図である。なお、第1撮影領域60と第2撮影領域62の詳細については後述する。
図1~図3に示すように、発光部20は、容器10を照らす光源である。発光部20は、容器10を撮像部40の反対側から照らすことができる面光源である。発光部20は、焼傷検査装置1で検査することを予定している最大の容器10の全体を照らすことができる大きさに設定されている。
図1~図3に示すように、遮光板80は、発光部20と第1回転支持部30に支持された容器10との間に配置される。遮光板80は、貫通孔82と遮光部81とを含む。貫通孔82は、発光部20と第1回転支持部30に支持された容器10との間に設けられ、発光部20からの光の一部を通して、容器10を照らす。遮光部は、軸線12に直交する横断面における貫通孔82の両側に設けられ、発光部20からの光の一部を遮る。遮光部81は、発光部20のうち所定範囲の光だけを容器10に照射させるためのものである。
図2及び図3に示すように、回転支持部(30,32)は、容器10を軸線12の周りに回転方向Rに回転させながら支持する。回転支持部(30,32)は、第1回転支持部30と第2回転支持部32とを含む。
図1及び図2に示すように、撮像部40は、容器10を挟んで発光部20と対向して配される。撮像部40は、容器10の軸線12を通る基準線41上に配置される。撮像部40は、容器10の少なくとも検査対象部分を撮影でき、ここでは容器10の胴部の全体が撮像部40の視野内に入るように配置されている。
図1のように、第1撮影領域60及び第2撮影領域62が基準線41から左右に36度の位置を中心に約6.6度の範囲に設定した場合には、両撮影領域は同時に撮影が開始されるため、第2撮影領域62で撮影された部分が第1撮影領域60で撮影されるまでの間に、容器10が約0.2回転(約72度)することになる。そのため、後述する図5では撮像された画像の一方を72度分ずらすことで容器表面14の同じ部分を比較する。
図1及び図2に示すように、判定部52は、制御部50の一部である。したがって、判定部52の判定結果によって制御部50が検査済みの容器10のその後の処理を指示する。判定部52は制御部50とは別に設けられてもよい。その場合には、判定部52の判定結果を制御部50に通知する。
図1~図6を用いて焼傷検査装置1を用いた検査方法について説明する。図6は、焼傷検査装置1を用いた検査方法を説明するフローチャートである。
図7~図9を用いて、変形例に係る焼傷検査装置2について説明する。図7は、変形例に係る焼傷検査装置2の平面図であり、図8は、発光領域22の移動を説明するための変形例に係る焼傷検査装置2の正面図であり、図9は、発光領域22の移動を説明するための変形例に係る焼傷検査装置2の正面図である。図1~図3と同じ機能を有する構成については、同じ名称と同じ符号を用いて説明し、詳細な説明は省略する。
また、図7~図9の焼傷検査装置2を用いて、実施例2が発光領域の幅D3を100mmとし、比較例2が発光領域の幅D3を120mmとして、内容量が500mlで容器の幅D2が72.2mmの容器10について焼傷18の検出を行った。実施例2では段差深さ0.05mmの焼傷18まで検出することができた。比較例2では、同じ容器でも焼傷18の検出が不安定となった。
Claims (4)
- 容器を照らす発光部と、
容器を当該容器の軸線の周りに回転させながら支持する回転支持部と、
容器を挟んで前記発光部と対向して配された撮像部と、
前記撮像部で撮像した第1撮影領域にある容器表面の第1画像と第2撮影領域にある容器表面の第2画像とに基づいて欠点の有無を判定する判定部と、
を含み、
前記第2画像は、前記第1画像に対応する容器表面の画像であり、
前記第1撮影領域は、前記撮像部と前記軸線とを結ぶ基準線に対して前記撮像部から見て右側にある容器表面の一部であり、
前記第2撮影領域は、前記基準線に対して前記撮像部から見て左側にある容器表面の一部であり、
前記第1撮影領域及び前記第2撮影領域は、それぞれ前記軸線を中心として1度~10度に設定されることを特徴とする、ガラス容器の焼傷検査装置。 - 請求項1において、
前記第1撮影領域は、前記基準線から右側に前記軸線を中心として前記基準線を0度とした場合に15度~60度の範囲の領域内に設定され、
前記第2撮影領域は、前記基準線から左側に前記軸線を中心として前記基準線を0度とした場合に15度~60度の範囲の領域内に設定されることを特徴とする、ガラス容器の焼傷検査装置。 - 請求項1または2において、
前記発光部と前記回転支持部に支持された容器との間に設けられ、前記発光部からの光の一部を通す貫通孔と、
前記軸線に直交する横断面における前記貫通孔の両側に設けられ、前記発光部からの光の一部を遮る遮光部と、
をさらに含み、
前記遮光部は、前記発光部からの光を通す貫通孔を有し、
前記軸線に直交する横断面において、前記貫通孔の幅は、容器の幅以上であって、かつ、容器の幅に30mmを足した範囲を超えないことを特徴とする、ガラス容器の焼傷検査装置。 - 請求項1または2において、
前記発光部の一部である発光領域を発光させる制御部をさらに含み、
前記回転支持部は、前記軸線の周りに容器を回転させると共に、容器を搬送方向に沿って搬送し、
前記制御部は、前記軸線に直交する横断面において前記発光領域の幅を容器の幅以上であって、かつ、容器の幅に30mmを足した範囲を超えないように設定し、前記発光領域を前記搬送方向に搬送される容器に追従して移動させることを特徴とする、ガラス容器の焼傷検査装置。
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PH12019500510A1 (en) | 2020-01-20 |
CN109844505A (zh) | 2019-06-04 |
JP6778754B2 (ja) | 2020-11-04 |
KR102187406B1 (ko) | 2020-12-08 |
CN109844505B (zh) | 2021-10-26 |
JPWO2018061196A1 (ja) | 2019-07-11 |
KR20190044654A (ko) | 2019-04-30 |
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