TWI753384B - Glass bottle inspection method and glass bottle manufacturing method - Google Patents

Abstract

[Problem] The present invention provides a method for inspecting a glass bottle and a method for producing a glass bottle, which can automatically determine whether a glass bottle having an engraving on the surface has a defect from an image. [Technical content] An aspect of the glass bottle inspection method is a method of inspecting a glass bottle having an engraving on the surface of the body, including imaging the rotating glass bottle and capturing an image of the entire circumference of the body The acquired image acquisition process S12, the masking process S18 of masking the engraving area including the pattern derived from the engraving in the image, and the determination process S20 of judging the presence or absence of defects in the area other than the masked engraving area in the image.

Description

Glass bottle inspection method and glass bottle manufacturing method

The present invention relates to a method for inspecting a glass bottle having an engraving on the surface of the body, and a method for producing the glass bottle.

It is known to have engraved glass bottles with concavities and convexities applied to the surface. The glass bottle with engraving is original and high-end, and can create a better impression on consumers.

For example, Patent Document 1 has proposed an inspection method of a glass bottle having irregularities on its surface. The invention of Patent Document 1 is to optically discriminate the engraved surface formed by unevenness and the smooth surface without unevenness. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 58-216906

[Problems to be Solved by Invention]

However, in the invention of Patent Document 1, only the surface with unevenness and the surface without unevenness can be discriminated, and the defects of the glass bottle cannot be inspected. When an engraved glass bottle with unevenness is to be optically inspected, it is difficult to determine whether it is a shadow caused by the unevenness or a shadow caused by defects such as scratches and air bubbles. Even now, the presence or absence of flaws such as scratches and air bubbles in glass bottles having irregularities can only be relied on by visual inspection.

Herein, the present invention provides a method for inspecting a glass bottle and a method for producing a glass bottle, which can automatically determine whether a glass bottle having an engraving on the surface has a defect from an image. [Technical means to solve the problem]

In order to solve at least a part of the above-mentioned problems, the present invention can be realized by the following aspects or application examples.

In addition, in the following description, "engraving" refers to the shape design of the appearance caused by the irregularities on the surface of the glass bottle, and "pattern" refers to the appearance caused by the "image" obtained by photographing the glass bottle. Sculpting" changes in light and dark density.

[1] An aspect of the glass bottle inspection method of the present invention is a method of inspecting a glass bottle having an engraving on the surface of a body portion, comprising: imaging the rotating glass bottle and measuring the entire circumference of the body portion. The image acquisition process of the captured image, the masking process of masking the engraving area in the image including the pattern originating from the engraving, and the determination of whether or not there is a defect in the area other than the masked engraving area in the image process.

According to one aspect of the glass bottle inspection method described above, the presence or absence of defects in a glass bottle having an engraving on the surface can be automatically determined from an image to determine whether or not there is a defect in a field other than the engraving field.

[2] In one aspect of the glass bottle inspection method described above, the above-mentioned defects include at least surface defects, and the above-mentioned image acquisition process is to image the transmitted light that has passed through the above-mentioned body portion by a line sensor.

According to one aspect of the glass bottle inspection method described above, the transmitted light is captured by the line sensor, so that even a defect such as a shadow of a surface bubble that does not easily appear can be automatically determined from the image.

[3] An aspect of the above-mentioned glass bottle inspection method further includes a pattern position detection process, which uses a pattern registration image previously created based on the shape of the engraving, and the pattern search is obtained by the image acquisition process. The above-mentioned image is detected, and the above-mentioned pattern is detected, and the above-mentioned masking process can mask the above-mentioned engraving area including the above-mentioned pattern detected by the above-mentioned pattern position detection process.

According to one aspect of the glass bottle inspection method described above, since the pattern can be detected using the pattern registration image created according to the shape of the engraving, the pattern position can be stably detected even if the pattern is thin in shade.

[4] In one aspect of the glass bottle inspection method, the pattern position detection process is to perform a pattern search for a predetermined height range in the image.

According to one aspect of the glass bottle inspection method described above, since the height at which the pattern in the image appears is almost constant, the load on the inspection apparatus can be reduced by performing pattern search in a predetermined height range.

[5] An aspect of the method for producing a glass bottle according to the present invention comprises forming a preform from a block with a rough die, forming the parison from a finishing mold to form the glass bottle, and performing the glass bottle process on the glass bottle. According to one aspect of the inspection method, a glass bottle judged to be free of the aforementioned drawbacks is obtained.

According to an aspect of the manufacturing method of the said glass bottle, even if it has an engraved glass bottle, since a flaw can be discriminated automatically, a flawless glass bottle can be manufactured. [Effect of invention]

According to one aspect of the glass bottle inspection method of the present invention, the presence or absence of defects in a glass bottle having an engraving on the surface can be automatically determined from an image. According to an aspect of the manufacturing method of the glass bottle of this invention, even if it has an engraved glass bottle, a flawless glass bottle can be manufactured.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the embodiments described below are not intended to limit the contents described in the scope of the claims of the present invention. In addition, all of the structures described below are not necessarily essential components of the present invention.

The glass bottle inspection method according to the present embodiment is a method of inspecting a glass bottle having an engraving on the surface of the body part, comprising: taking an image of the rotating glass bottle and acquiring an image of the entire circumference of the body part. The acquisition process, the masking process of masking the engraving area including the pattern derived from the engraving in the image, and the determination process of determining whether or not there is a defect in the area other than the masked engraving area in the image.

The method for producing a glass bottle of the present embodiment is an aspect in which a preform is formed from a block with a rough die, the preform is formed into a glass bottle by a finishing mold, and the glass bottle inspection method described above is performed on the glass bottle. Instead, a glass bottle judged to be free of the aforementioned drawbacks was obtained.

1. Check the device The inspection apparatus 1 of the glass bottle 10 is demonstrated in detail using FIG. 1 and FIG. 2. FIG. FIG. 1 is a side view illustrating an inspection apparatus 1 using the inspection method of the present embodiment, and FIG. 2 is a plan view illustrating the inspection apparatus 1 .

The inspection apparatus 1 shown in FIG. 1 and FIG. 2 is the inspection apparatus 1 of the glass bottle 10 which has the engraving 15 on the surface. The inspection device 1 is incorporated into a production line of glass bottles 10 (not shown in the figure), and forms part of the production line. After forming, the glass bottles 10 that have been gradually cooled are conveyed to the inspection device 1, and the inspected glass bottles 10 are conveyed to the inspection device 1. Next process handling.

The inspection apparatus 1 includes: a light emitting part 20 having a light emitting surface 22 for irradiating light on the glass bottle 10; an imaging part 40 arranged to face the light emitting part 20 across the glass bottle 10; The image 80 (FIG. 4) of the imaged glass bottle 10 is the control part 50 of the judgment part 52 which judges the presence or absence of a defect.

Here, as shown in FIG. 1 , the glass bottle 10 is inspected in an upright state, that is, in a state in which the central axis 12 is along the vertical direction. The vertical direction is the direction of gravity, and the horizontal direction is the direction perpendicular to the vertical direction.

The inspection apparatus 1 includes a stage 30 that supports the glass bottle 10 while rotating around the center axis 12 , and a side roller 32 that rotates the glass bottle 10 while contacting the side surface of the glass bottle 10 . As shown in FIG. 1, although the side roller 32 is located between the glass bottle 10 and the imaging unit 40, it is only for the convenience of describing the side roller 32, and the side roller 32 is arranged so as not to hinder the imaging unit 40 from moving the glass The position where the bottle 10 is photographed.

The glass bottle 10 is transparent or translucent. Translucency refers to a degree of transparency that can be used to identify defects of the body 13 of the glass bottle 10 , such as surface air bubbles 18 , by light from the light-emitting portion 20 that has passed through the glass bottle 10 . The glass bottle 10 is, for example, a wide-mouthed bottle having a neck 11, a body 13, and a bottom 14 having a circular cross-section. The cross-sectional shape of the glass bottle 10 may be polygonal. The glass bottle 10 has an engraving 15 on the surface. The engraving 15 is the asperity formed on the surface of the glass bottle 10, and is formed by, for example, the asperity engraved on the surface of the molding die.

The side rollers 32 are in contact with the body portion 13 and rotate the glass bottle 10 around the center axis 12 . The central axis 12 is a dotted line that becomes the rotational central axis of the glass bottle 10 to rotate. The side roller 32 rotates the glass bottle 10 by transmitting the driving force of the motor 60 to the glass bottle 10 through the belt 35 or the like by the instruction of the rotation control unit 62 . The side roller 32 rotates the glass bottle 10 by a predetermined amount at a predetermined speed. The predetermined amount of rotation refers to a sufficient amount to allow the entire circumference of the glass bottle 10 to be imaged. The predetermined amount of rotation is set to, for example, 1.5 or more turns, so that the entire detected object can be grasped from one image data. The rotation detection unit 54 is a rotary encoder that can be directly or indirectly attached to the motor 60 . Based on the pulse output of the rotation detection unit 54 , the imaging unit 40 captures images of the glass bottle 10 for a predetermined number of times.

The light-emitting unit 20 is a light source that illuminates the glass bottle 10 . The light emitting unit 20 is a surface light source that has a light emitting surface 22 on the side of the glass bottle 10 and can illuminate the glass bottle 10 from the side opposite to the imaging unit 40 . The height of the light-emitting part 20 is set so that the whole of the largest glass bottle 10 scheduled to be inspected by the inspection apparatus 1 can be irradiated. As shown in FIG. 2 , the overall width W2 of the light-emitting surface 22 is narrower than the overall width W1 of the glass bottle 10 . By making the full width W2 narrower than the full width W1, the shadow of the surface air bubble 18 can be clearly imaged. The full widths W1 and W2 are the full widths of the glass bottle 10 and the light-emitting surface 22 when the inspection apparatus 1 is viewed from above.

As shown in FIG. 2 , the light emitting surface 22 is, for example, a rectangular shape, and emits light on almost the entire surface. The light-emitting surface 22 faces the glass bottle 10 and the imaging unit 40 , and the light that has passed through the glass bottle 10 can reach the imaging unit 40 .

As the light source of the light emitting unit 20, for example, a known light source such as LED and organic EL can be used. The light-emitting part 20 is diffused illumination, and when LEDs are used, the glass bottle 10 can be irradiated with uniform light using a diffusion plate on the light-emitting surface 22 . A known diffuser plate can be used which diffuses and emits light from a light source such as an LED to the outside. The light is diffused by the diffuser plate, and when a large number of light sources are used, the unevenness of the part where the light source does not exist can be reduced.

The imaging unit 40 is arranged so that the glass bottle 10 and the light-emitting unit 20 are held to face each other. The imaging unit 40 is arranged so as to image the surface of the glass bottle 10 on the extension line of the central axis 12 . The imaging unit 40 is arranged so as to be capable of imaging at least the inspection object part of the glass bottle 10 , and the entire vertical direction of the body 13 of the glass bottle 10 can enter the field of view of the imaging unit 40 .

The imaging unit 40 can capture an image including the detected object (for example, including the surface air bubble 18 ) by the light transmitted through the light emitting unit 20 of the glass bottle 10 . As the imaging unit 40, for example, a known line sensor camera can be used. The imaging unit 40 captures an image by the output of the rotation detecting unit 54 in accordance with the rotation of the side roller 32, and the image 80 is not affected even if the rotation speed changes for any reason.

The imaging unit 40 images the entire circumference of the body 13 and transmits the data to the image processing unit 53 of the control unit 50 .

The control unit 50 includes a determination unit 52 and an image processing unit 53 . The control unit 50 is, for example, a processor including a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit), an HDD (Hard Disk Drive), an SSD (Solid State Drive), a ROM ( Memory devices such as read-only memory, Read-Only Memory, and RAM (Random Access Memory), input devices such as keyboards, mice, and touchpads, liquid crystal displays, and organic EL (electrical) It is composed of display devices such as light-emitting, Electro Luminescence) displays, and digital input and output boards such as I/O boards. The control unit 50 executes the process of inspecting the glass bottle 10 . Although the processing of intermittently conveying the glass bottle 10 at a predetermined speed by the inspection apparatus 1 is performed by a control unit different from the control unit 50 , it may be performed by the control unit 50 .

The determination unit 52 determines the presence or absence of a defect based on the image acquired from the imaging unit 40 . The defect determined by the determination unit 52 is, for example, a surface defect. Surface defects refer to surface air bubbles 18 , dirt, and foreign matter existing on the inner surface or the outer surface of the glass bottle 10 . The determination unit 52 is capable of determining, for example, defects in the interior of the glass bottle 10 in addition to surface defects. The determination unit 52 preferably determines the surface air bubbles 18 having a vertical length of 3.0 mm or more, a horizontal length of 1.0 mm or more, and a depth of 0.05 mm or more as defects. In addition, it is preferable that the determination unit 52 does not mistake the appearance of the image derived from the engraving 15 as a defect.

The control unit 50 outputs the determination result of the determination unit 52 to the outside of the glass bottles 10 , for example, excludes the glass bottles 10 determined to be defective by the line after the discharge unit of the inspection apparatus 1 . The specific processing of the control unit 50 is described in the following "3. Inspection method".

2. Manufacturing method The manufacturing method of the glass bottle 10 of this embodiment is demonstrated. The glass bottle 10 is first formed into a preform from a block by a rough die. The parison is formed into a bottomed cylindrical shape by blowing compressed air into a high-temperature block placed in a rough mold. A spool valve can also be used with compressed air. Next, the parison is moved toward the sizing mold, and compressed air is blown into the parison in the sizing mold to mold the glass bottle 10 , which is a product. Since the glass bottle 10 after forming is high temperature, it is slowly cooled by moving toward the gradual cooling furnace. The following inspection method is implemented about the glass bottle 10 carried out from the gradual cooling furnace. And the glass bottle 10 judged to have no defect can be regarded as a good product by carrying out the following inspection method.

Thus, according to the manufacturing method of the glass bottle 10 of this embodiment, even if it has the glass bottle 10 with the engraving 15, since a defect can be discriminated automatically, the glass bottle 10 without a defect can be manufactured.

3. Inspection method The inspection method of the glass bottle 10 of this embodiment using the inspection apparatus 1 of FIG. 1 and FIG. 2 is demonstrated using FIG. 3 - FIG. 7. FIG. FIG. 3 is a flowchart of the inspection method according to the present embodiment, FIG. 4 is an example of the image 80, FIG. 5 is a diagram explaining the image preprocessing S14, the pattern position detection process S16, and the masking process S18, and FIG. 6 is a Fig. 7 is a diagram for explaining the image preprocessing S14 and the masking process S18, and Fig. 7 is a diagram for explaining the determination process S20.

As shown in FIG. 3, the inspection method of the present embodiment is a method of inspecting a glass bottle 10 having an engraving 15 on the surface of the body portion 13, and includes at least an image acquisition process S12, a masking process S18, and a discrimination process S20. The inspection method of the present embodiment may further include a process S10 of starting imaging before S12, may include an image pre-processing S14 for applying predetermined processing to an image after S12, or may further include a pattern position detection process after S14 S16. Each process will be sequentially described below with reference to FIG. 1 and FIG. 2 .

S10: The control unit 50 instructs the imaging unit 40 to start imaging. The imaging unit 40 captures the transmitted light transmitted through the body 13 of the glass bottle 10 that rotates around the central axis 12 by the line sensor in accordance with the instruction of the control unit 50 . At this time, the control unit 50 calculates the rotation angle of the glass bottle 10 based on the output from the rotation detection unit 54, and continuously images 1.5 times (for example, 360°×1.5=540°). The disadvantage shown in FIG. 1 is, for example, surface air bubbles 18 . By imaging the transmitted light by the line sensor, even a defect such as the shadow of the surface air bubble 18 that does not easily appear can be automatically determined from the image. The image data to be captured is transmitted from the imaging unit 40 to the control unit 50 .

S12 : The control unit 50 executes the image acquisition process S12 of acquiring the image 80 ( FIG. 4 ) captured from the image 80 ( FIG. 4 ) of the entire circumference of the body 13 transmitted from the imaging unit 40 . The image 80 is a memory device (not shown) stored in the control unit 50 . In the image 80, at least an image of 1.5 circles of the body 13 is captured, and an image of 1.5 circles of the neck 11 may be further captured. The image 80 has more than 1.5 circles of the body 13, and the control unit 50 can arrange a plurality of inspection areas (82 to 84, 88, 89) corresponding to one circle of the body 13 in the portrait without interruption. 80.

The image 80 shown in FIG. 4 shows the pattern 15a derived from the engraving 15, the seam line 16 extending in the vertical direction, and the surface bubble shadow 18a, and is captured as a dark shadow. The seam line 16 is a shadow generated by the step difference formed by using the mold when molding the glass bottle 10 . The shadows identified as defects in the image 80 may include, in addition to the surface bubble shadows 18a derived from the surface bubbles 18, shadows derived from internal bubbles, white stones, foreign matter, and the like. In order to clearly distinguish these shadows from the pattern 15a and the seam line 16 and identify them as defects, a plurality of rectangular inspection areas (82 to 84, 88, 89) are provided in the portion of the image 80 where the body 13 is imaged. , the pre-set inspection rules are implemented in each inspection area. In FIG. 4, each inspection area (82 to 84, 88, 89) is shown by a dotted line.

S14: The image processing unit 53 executes the image preprocessing S14 on the pattern 15a in order to more reliably execute the pattern position detection process S16. The image preprocessing S14 is to search for the pattern 15a from an abstract shape, for example, "blurring" may be performed. "Blurring" can be performed, for example, by an averaging filter. The averaging filter is a quadratic element that replaces the pixel value of the eye-catching pixel with the average value of all pixel values within the filter size range and outputs it. filter.

In addition to the "blurring process", the image pre-processing S14 may employ, for example, a "dilation process" in which the black of the shadow is inflated.

S16: As shown in FIG. 5, the determination unit 52 executes the pattern position detection process S16. Before executing the pattern position detection process S16 , as shown in FIG. 5( a ), the operator prepares the pattern registration image 86 created according to the outer shape of the engraving 15 in advance. The pattern registration image 86 may be created according to the shape of the pattern 15 a derived from the engraving 15 . The pattern registration image 86 is a frame slightly larger than the engraving 15 , and may be set to the same size as the rectangular first inspection area 82 . The pattern registration image 86 is a memory device (not shown) stored in the control unit 50 .

Next, the determination unit 52 executes the pattern position detection process S16. As shown in FIGS. 5(b) and (c), the pattern position detection process S16 is performed using the pattern registration image 86 previously created according to the shape of the engraving 15 for the image 80 acquired in the image acquisition process S12. The pattern is searched, and the pattern 15a is detected. The pattern search is to search the image 80 for a detected object suitable for the pattern registration image 86, and when the pattern registration image 86 matches the shape of the pattern 15a to a certain extent, the detected object is detected as the pattern 15a. Since the pattern 15a is detected using the pattern registration image 86 created according to the outer shape of the engraving 15, the position of the pattern 15a can be stably detected even if the shade of the pattern 15a is thin.

In the pattern position detection process S16 , pattern search can be performed for a predetermined height range in the image 80 . As shown in FIG. 1, the glass bottle 10 is positioned on the mounting table 30, and the height of the appearance of the pattern 15a in the photographed image 80 is almost constant. Here, as shown in FIG. 4, the first height H1 from the lower end of the image 80 is set as the lower limit, and the horizontal range of the second height H2 is set in the pattern search area 85 (the rectangular area surrounded by a dotted lock line) , and perform a pattern search in the pattern search field 85 . By performing a pattern search for a predetermined height range in this way, the processing load of the inspection apparatus 1 can be reduced.

S18: The image processing unit 53 executes the masking process S18. As shown in FIGS. 5( d ) and ( e ), in the masking process S18 , the engraving area 81 including the pattern 15 a originating from the engraving 15 in the portrait 80 is masked by the mask 87 . The engraving area 81 is the entire width including the pattern 15a. The engraving area 81 may be an area surrounded by the pattern registration image 86 , or an area slightly narrower than the pattern registration image 86 and closer to the pattern 15 a may be the engraving area 81 . Mask 87 is equivalent to engraving field 81 . The mask 87 is created in advance together with the pattern registration image 86 . The arrangement of the mask 87 and the pattern registration image 86 may be set in advance. As a result, if it is confirmed by the pattern search that the pattern registration image 86 is arranged at an appropriate position in the image 80, the engraving area 81 is set in the image 80 and masked by the mask 87 at the same time. Furthermore, the image processing unit 53 arranges, on the image 80 , a plurality of inspection areas ( 82 to 84 , 88 , 89 ) of preset shapes based on the position of the pattern 15 a detected by the pattern search. By setting the relative position between the position of the pattern 15a and the positions of the inspection areas (82 to 84, 88, 89) in advance, when the position of the pattern 15a is determined, the plural inspection areas (82 to 84, 88, 89) can be set. 88, 89) are automatically laid out on the portrait 80.

In addition to the above-described S14 to S18, for example, other image processing may be employed in S14. For example, the image processing unit 53 may make the image 80 acquired by the image acquisition process S12 of FIG. 6(a) a plurality of times of expansion processing as shown in FIG. The image 80 is binarized as shown in Fig. 6(c), the pattern 15a detected by the discriminating unit 52 executing the pattern position detection process S16, and the engraving area 81 is set, so that the image processing unit 53 is as shown in Fig. 6(d) The masking process S18 is carried out. In this case, in the pattern position detection process S16, the pattern 15a can be detected from the center of gravity and the area of the pattern 15a obtained by the binarization process.

S20: The determination unit 52 executes the determination process S20. The determination process S20 is to determine the presence or absence of defects in areas other than the masked engraving area 81 in the portrait 80 . Since it is determined whether or not there is a defect in a field other than the engraving field 81 , the presence or absence of a defect in the glass bottle 10 having the engraving 15 on the surface can be automatically determined from the image 80 . The determination process S20 is for each of the first inspection area 82 , the second inspection area 83 , the third inspection area 84 , the fourth inspection area 88 , and the fifth inspection area 89 , which are set in the image 80 , to be inspected individually. The rules are implemented, and the shortcomings are judged. Each inspection area is set in advance, for example, in a rectangular shape of a predetermined size.

The first inspection area 82 is an area surrounding the engraving area 81 and is narrower than the second inspection area 83 . In the first inspection area 82, except for the area covered by the mask 87, the image processing unit 53 performs, for example, the surface air bubbles 18 with thin (or thin) lines hatched in Fig. 7(a). After the vertical and horizontal direction emphasis processing is performed, if the binarization processing is performed, the hatched line as shown in Fig. 7(b) becomes an uninterrupted continuum. The determination unit 52, after the binarization process, determines whether the detected object is a defect or not based on the area and the maximum length of the detected object. This glass bottle 10 is treated as a good product (S22). Then, when the detected object has a defect, it is determined that it has a defect, and the control unit 50 treats the glass bottle 10 as a defective product (S24).

The second inspection area 83 surrounds the first inspection area 82 and extends from the lower end of the image 80 to the lower end of the neck 11 . The second inspection area 83 is a portion other than the first inspection area 82 . The image processing unit 53 performs the same image processing as the first inspection area 82 for the second inspection area 83, and the determination unit 52 determines whether the detected object is a defect (S20). Since the second inspection area 83 is less likely to erroneously determine the pattern 15a as a defect, the determination unit 52 can determine the detected objects in the second inspection area 83 with higher accuracy than the first inspection area 82 .

The two third inspection areas 84 are arranged on the left and right outer sides of the second inspection areas 83 and extend from the lower end of the image 80 to the lower end of the neck 11 . The third inspection area 84 is a portion where the seam line 16 arranged in the image 80 appears. The inspection rule in the third inspection area 84 needs to be different from the detection body seam line 16 . For example, as shown in FIGS. 7( c ) and ( d ), the detected object is divided into plural numbers in the vertical direction, and the distances D1 and D2 between the two lines in the horizontal direction within the divided frame are measured. The discriminating unit 52 discriminates that the surface bubble 18 is the surface air bubble 18 when the distance D1 between the two lines is wider than a predetermined width and the detected objects in the upper and lower frames are, for example, three or more consecutive, and the distance D2 between the two lines is the ratio. If the predetermined width is narrower, it is determined as the seam line 16 . In addition, the image processing unit 53 removes the vertical shadow (the seam line 16 ) from the image in FIG. 7(e), and further performs binarization processing as shown in FIG. 7(f), and the determination unit 52 is: Whether it is a defect is judged by the area of the detected body. At this time, since the vertical shading can be eliminated by emphasizing the vertical luminance change by the image processing, surface air bubbles having a horizontally long portion having a vertical luminance change remain. In this way, by applying two different inspection rules at the same time, the seam line 16 is not mistaken as a defect and can be inspected more accurately.

The fourth inspection area 88 extends from the lower end of the image 80 to the lower end of the neck 11 between the second inspection area 83 and the third inspection area 84 . The fourth inspection area 88 is a portion facing the second inspection area 83 in the body 13 . The image processing unit 53 and the determination unit 52 can perform the same processing as the second inspection area 83 with respect to the fourth inspection area 88 .

The fifth inspection area 89 corresponds to the portion of the neck 11 extending above the second inspection area 83 to the fourth inspection area 88 . The fifth inspection area 89 is divided into two on the image 80 except for the position where the seam line 16 is imaged. This is because interference shadows perpendicular to the seam line 16 occur at positions located between the two fifth inspection areas 89 . The image processing unit 53 and the determination unit 52 can perform, for example, the same processing as the third inspection area 84 for the fifth inspection area 89 .

The present invention is not limited to the above-described embodiments, and various modifications can be made, and includes substantially the same configuration (configuration) as the configuration (configuration) described in the embodiment. Here, "the same structure (structure)" means that the function, method, and result are the same structure (structure), or the structure (structure) with the same purpose and effect. In addition, the present invention includes a configuration (structure) in which non-essential parts of the configuration (configuration) described in the embodiment are replaced. In addition, the present invention includes a configuration (configuration) that can achieve the same functions and effects as the configuration (configuration) described in the embodiment, or a configuration (configuration) that can achieve the same purpose. In addition, the present invention includes a configuration (configuration) in which a known technique is added to the configuration (configuration) described in the embodiment.

1: Inspection device 10: glass bottle 11: Neck 12: Center axis 13: Carcass 14: Bottom 15: Carving 15a: Appearance 16: seam line 18: Surface bubbles 18a: Surface Bubble Shadows 19: Mouth 20: Light-emitting part 22: Glowing Surface 30: Mounting table 32: Side Roller 35: Belt 40: Camera Department 50: Control Department 52: Discrimination Department 53: Image Processing Department 54: Rotation detection part 60: Motor 62: Rotation control part 80: Portrait 81: Sculpting Field 82: 1st inspection area 83: 2nd inspection area 84: 3rd inspection area 85: Graph Search Field 86: Graphical login portrait 87: Mask 88: 4th inspection area D1, D2: distance between two lines H1: first height H2: 2nd height W1,W2: full width

[Fig. 1] A side view showing a schematic inspection device. [Fig. 2] A plan view showing a schematic inspection device. [FIG. 3] A flowchart of the inspection method of the present embodiment. [Figure 4] An example of a portrait. [FIG. 5] A diagram explaining the image processing, the detection process, and the masking process. [FIG. 6] A diagram explaining the image processing and masking process. [FIG. 7] A diagram illustrating the discrimination process.

Claims (5)

A method for inspecting a glass bottle, the method for inspecting a glass bottle having an engraving on the surface of the body, wherein the engraving is formed by concavities and convexities engraved on a mold during forming, characterized by comprising: rotating the rotating The image acquisition process of photographing the glass bottle and acquiring the image of the entire circumference of the carcass, and the masking process of shielding the engraving area that includes the image originating from the engraving in the image, and the masking process for the image except the masked image. The judgment process for judging the presence or absence of defects in fields other than the aforementioned engraving field. The inspection method for a glass bottle according to claim 1, wherein the defects include at least surface defects, and the image acquisition process is performed by imaging the transmitted light passing through the body with a line sensor. The inspection method for glass bottles according to claim 1 or 2, further comprising a pattern position detection process using a pattern registration portrait created in advance based on the shape of the engraving, and the pattern search is obtained by the image acquisition process The aforementioned image is detected, and the aforementioned pattern is detected, and the aforementioned masking process is to mask the aforementioned engraving area including the aforementioned pattern detected by the aforementioned pattern position detection process; according to the aforementioned pattern detected by the aforementioned pattern search. position, and arranges a plurality of inspection fields with a preset shape in parallel on the above-mentioned image. , at least two inspection areas of the plurality of inspection areas are arranged in the portion where the seam line of the portrait image appears. The glass bottle inspection method according to claim 3, wherein the pattern position detection process is to perform pattern search for a predetermined height range in the portrait. A method of manufacturing a glass bottle, characterized in that: forming a preform from a block material by a rough mold, forming the above-mentioned parison into the above-mentioned glass bottle by a finishing model, and performing any one of claims 1 to 4 for the above-mentioned glass bottle. The inspection method of the glass bottle is obtained, and the glass bottle that is judged to be free of the aforementioned shortcomings is obtained.

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