JP2009192304A - Bottle inspection device and bottle inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To well detect a scratch flow even in the case where a bottle is wetted by washing. <P>SOLUTION: A lamp 21 is inserted in the bottle 1 through the bottle mouth of the bottle 1. A lamp support part 22 is equipped with the feeder line to the lamp 21 and supports the lamp 21 in the bottle 1. A camera 10 is equipped with an area CCD and arranged to the outside of the bottle 1. Further, a shading plate 23 is arranged between the bottle 1 and the camera 10 so that the direct light from the lamp 21 is not received by the camera 10. In the case where there is a scratch flaw part 2 in the bottle 1, a part of the light is diffused by the scratch flaw part 2 to be thrown on the area CCD of the camera 10 to obtain a bright image. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wrinkle inspection device and a wrinkle inspection method, and more particularly to a wrinkle inspection device and a wrinkle inspection method for inspecting a surface of a wrinkle for scratches when the wrinkle is wet by cleaning.

As described in Japanese Patent Application Laid-Open No. 2004-133867, the recycle used scissors have ring-shaped scratches on the body as they are used repeatedly. In particular, milk glass bottles with a urethane coating on the surface are susceptible to scratches due to the low hardness of urethane. Since these scratches have light diffusibility, when the degree of scratches exceeds a predetermined limit, the scratches are whitened and can be visually confirmed even under general illumination. Therefore, even if the configuration is such that reflection by illumination from the outside of the eyelids or transmission of the scattered light is transmitted through the entire eyelids, scratch detection is possible to some extent by utilizing the light scattering property. Thus, in the conventional optical inspection of the eyelids, illumination (light projection) and light reception are performed from the outside of the eyelids.
JP-A-8-145915

  However, the scratches in the state where the inconspicuous scratches and wrinkles are wet with the cleaning liquid or the like have a drawback that the light diffusibility is extremely reduced in the above-described configuration, so that sufficient detection cannot be performed.

  In addition, Patent Document 1 describes a scratch inspection apparatus for a flaw coated with tin and wet with water. However, this inspection apparatus has a problem that a flaw that is not a tin coating cannot be detected. .

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a wrinkle inspection apparatus and a wrinkle inspection method having high detection power even in a state where the light diffusibility of scratches is weak.

  In order to achieve the above object, the wrinkle inspection apparatus according to claim 1 is a wrinkle inspection apparatus for inspecting scratches on the surface of the wrinkle, the irradiation means for irradiating light from the inside of the wrinkle to the outside, and Light received by the irradiating means, the light receiving means for receiving light diffused by scratches on the surface of the eyelids outside the eyelids, and the scratches on the surface of the eyelids based on the output from the light receiving means It is characterized by comprising evaluation means for evaluating the presence and absence and degree.

  Thereby, even if the wrinkles are washed and wet, it is possible to inspect the presence and extent of scratches.

  According to a second aspect of the present invention, in the wrinkle inspection apparatus according to the first aspect, the irradiating means is a substantially point light source disposed at a substantially central portion inside the wrinkle.

  Thereby, the light which goes to the exterior from the inside of a bag can be irradiated easily.

  According to a third aspect of the present invention, in the wrinkle inspection apparatus according to the first or second aspect, the light irradiated by the irradiation unit is not directly incident on the light receiving unit, which is disposed between the irradiation unit and the light receiving unit. The light shielding means for shielding light is provided with a light shielding means for shielding the light path from the scratched portion of the surface of the ridge to the light receiving means.

  As a result, the light receiving means can receive only the light diffused by the scratch.

  As shown in claim 4, in the wrinkle inspection apparatus according to claim 1, comprising a pedestal on which the wrinkle is placed, the irradiating means is a light source that irradiates light toward the bottom surface from the opening portion of the wrinkle, The light receiving means receives the light emitted by the irradiating means and diffused by the scratches on the surface of the eyelid after being irregularly reflected on the bottom surface of the eyelid or the pedestal surface. .

  Thereby, the light which goes to the exterior from the inside of a bag can be irradiated easily.

  According to a fifth aspect of the present invention, in the wrinkle inspection apparatus according to the fourth aspect, at least a part of the pedestal is formed of a light diffusive reflecting member in a region in contact with the bottom surface of the wrinkle. And

  As a result, light that goes straight from the bottom of the heel and goes out of the bottom surface can be diffusely reflected and re-entered inside the heel.

  According to a sixth aspect of the present invention, in the wrinkle inspection apparatus according to the first aspect, the irradiation means irradiates a laser beam on the inside of the scratch on the surface of the wrinkle.

  Thereby, the laser beam can be diffused in the scratched part.

  According to a seventh aspect of the present invention, in the wrinkle inspection apparatus according to the sixth aspect, the irradiating means is configured to irradiate the inner surface of the surface of the wrinkle with the laser beam incident from the opening of the wrinkle. Features.

  Thereby, the light which goes to the exterior from the inside of a bag can be irradiated easily.

  As shown in claim 8, in the wrinkle inspection apparatus according to claim 6, the irradiating means irradiates the surface of the wrinkle surface with the laser beam incident on the surface of the wrinkle. And

  Thereby, the light which goes to the exterior from the inside of a bag can be irradiated easily.

  As shown in claim 9, in the wrinkle inspection apparatus according to any one of claims 6 to 8, the laser beam is formed in a line shape, and a longitudinal direction thereof is in a direction from the opening opening portion to the bottom surface portion of the wrinkle. It is irradiated so that it may become.

  Thereby, it is possible to evaluate a wide scratch on the surface of the eyelid.

  As shown in claim 10, in the wrinkle inspection apparatus according to any one of claims 1 to 9, a position opposite to the light receiving means with respect to the wrinkle, and a position at a predetermined distance from the wrinkle, It is characterized by disposing a black wall for absorbing light.

  This makes it possible to evaluate the presence and extent of scratches on the surface of the eyelid without being affected by extra light.

  The wrinkle inspection apparatus according to any one of claims 1 to 10, wherein the light receiving means is a camera provided with an area sensor, and the evaluation means is a predetermined image captured by the camera. It is characterized in that the presence or absence and degree of scratches on the surface of the wrinkles are evaluated by evaluating the area.

  This makes it possible to easily evaluate the presence and extent of scratches on the surface of the eyelids.

  As shown in claim 12, in the wrinkle inspection apparatus according to any one of claims 1 to 10, the light receiving means is a photosensor, and the evaluation means is based on a magnitude of an output signal of the photosensor. It is characterized by evaluating the presence and extent of scratches on the surface of the eyelids.

  This makes it possible to easily evaluate the presence and extent of scratches on the surface of the heel.

  As shown in claim 13, in the scissors inspection apparatus according to any one of claims 1 to 12, the scissors are glass scissors coated with urethane.

  As shown in claim 14, in the wrinkle inspection apparatus according to any one of claims 1 to 13, the wrinkle is in a state wetted with a cleaning liquid or water.

  In order to achieve the above object, the wrinkle inspection method according to claim 15 is a wrinkle inspection method for inspecting scratches on the surface of the wrinkle, wherein the illumination step irradiates light from the inside of the wrinkle to the outside, and A light receiving process for receiving light emitted by the illumination process and diffused by a scratch on the surface of the eyelid on the outside of the eyelid, and a scratch on the surface of the eyelid based on an output from the light receiving process And an evaluation step for evaluating the presence and the degree of the presence.

  Thereby, even if the wrinkles are washed and wet, it is possible to inspect the presence and extent of scratches.

  According to the present invention, it is possible to provide a wrinkle inspection apparatus and a wrinkle inspection method that can detect scratches with high sensitivity, and in particular, can perform a good inspection when the wrinkle is wet by cleaning. .

  According to the present invention, “lighting in which the traveling direction of light is directed from the inside of the bag toward the outside of the bag” enables good detection even in a wet state.

  The best mode for carrying out the present invention will be described below. In addition, the test object in this specification is the milk candy which coated the glass candy with urethane. Urethane has a relatively soft surface, and if it is recycled, it will cause ring-like scratches on the barrel due to contact between the heels when the heels are transported. In addition, this abrasion occurs in two places, the top and bottom, which have the largest diameter due to the shape of the milk candy.

<First Embodiment>
FIG. 1 is a diagram showing an outline of a flaw scratch inspection apparatus according to a first embodiment.

  As shown in the figure, the flaw scratch inspection apparatus of the present embodiment includes a lamp 21, a lamp support portion 22, a light shielding plate 23, and a camera 10.

  The lamp 21 is inserted into the bag 1 through the port of the bag 1. The lamp support portion 22 includes a power supply line to the lamp 21 and supports the lamp 21 inside the basket 1. The camera 10 includes an area CCD and is disposed outside the basket 1. Further, the light shielding plate 23 is disposed between the basket 1 and the camera 10 so that direct light from the lamp is not received by the camera 10. Therefore, when there is a scratch at the scratching possibility position 2 of the eyelid 1, a part of the light is diffused by the scratch, and a part of the light is incident on the area CCD of the camera 10, and a bright image can be obtained.

<Second Embodiment>
FIG. 2 is a diagram showing an outline of a flaw scratch inspection apparatus according to the second embodiment.

  The flaw scratch inspection apparatus of the present embodiment uses light from a lamp (not shown) housed in the light source box 25 as a light source. The light from the lamp is led out by a light guide 24 made of fiber, and the inside of the ridge 1 is irradiated from the shed by arranging the exit outlet at the tip of the light guide 24 at substantially the same height as the shed of the shed 1. .

  As the light receiving device, a camera 10 having an area CCD of 1.5 million pixels is used. The camera 10 sets a lens and a photographing distance so that the body of the heel 1 enters the screen, and a ring-shaped scratch generation site. Take a picture from the side. On the background side of the heel 1 as viewed from the camera 10, a black wall is disposed at a position separated by about 50 cm or more, and no illumination other than the inspection light source is turned on. The image processing apparatus 11 evaluates the presence / absence or degree of scratches on the image captured by the camera 10.

  Here, if the light utilization efficiency is low only by the reflection of the bottom inner surface of the ridge 1, and the diffused light intensity of the scratches is not sufficient, the pedestal 26 with which the bottom surface of the ridge 1 contacts is made a light diffusive reflecting member. It is preferable that light that travels straight from the bottom surface of the ridge 1 and goes out of the bottom surface can be diffusely reflected and re-entered into the ridge 1. For the light diffusive reflecting member, a white plastic plate having a satin-like surface may be used in consideration of durability. However, the light diffusing reflecting member is not limited to a specific member. For example, white paper having low gloss is used. It may be used.

  FIG. 3 shows an image of the eyelid 1 having the scratch 31 obtained by the camera 10 in the eyelid scratch inspection apparatus of the present embodiment. In the image, the scratch 31 on the body of the heel 1 is brightly captured as a line-shaped light band. Since a plurality of actual scratches 31 are generated on the outer periphery of the heel 1, these scratches 31 form a ring on the outer periphery of the heel 1, but the scratch 31 is a line because the same image is captured from the side. The image is captured in a shape. The more the scratches and the deeper the scratches, the greater the transmitted scattered light and the brighter the image of the scratches 31. Therefore, the image processing apparatus 11 provides a screen processing area 30 as shown in FIG. 3 in the vicinity of the scratching possibility position 2 and binarizes by providing a plurality of appropriate luminance thresholds within the area. By evaluating the area of the bright part every time, it is possible to evaluate the presence or degree of scratches.

<Third Embodiment>
FIG. 4 is a diagram showing an outline of a flaw scratch inspection apparatus according to the third embodiment.

  The wrinkle scratch inspection apparatus of the present embodiment uses a laser beam 27 as a light source. The laser beam 27 is incident from the shed of the ridge 1 and radiates to one side (lower side in this example) of the ring-shaped scratching position 2 from the inside of the ridge toward the outside. A photosensor 12 is used as a light receiving device, and the photosensor 12 receives transmitted diffused light at a position off the direct transmission optical axis of the laser beam 27. When there is no scratch at the scratch potential position 2 of the heel 1, the beam hardly diffuses and travels through the heel wall of the heel 1 so that it does not enter the photosensor 12. When there is a scratch at the scratch potential position 2 of the eyelid 1, the photosensor 12 receives the light scattered by the scratch and outputs an electrical signal corresponding to the amount of light received. The image processing apparatus 11 determines the presence and extent of scratches based on the magnitude of the electrical signal.

  In the present embodiment, the laser beam 27 is made incident from the mouth of the eyelid 1, but may be made incident through the body of the eyelid 1 as shown in FIG. Further, as shown in FIG. 6, the laser beam 27 is formed in a strip shape, and the longitudinal direction of the strip-shaped laser beam 27 is directed to the bottom portion from the opening portion of the rod 1 through the trunk portion of the rod 1. May be incident. In this way, by irradiating the band-like laser beam 27 to the scratching possibility position 2, it is possible to appropriately detect the scratching 31 even when the width of the scratching possibility position 2 is wide in the vertical direction. Become.

  Further, as the irradiating means and the light receiving means, the lamp 21 and the camera 10 are used in the first embodiment and the second embodiment, and the laser beam 27 and the photosensor 12 are used in the third embodiment. However, it is not limited to this combination.

  Further, processing such as rotating the eyelid 1, moving the camera 10 or the photosensor 12 as the light receiving means, arranging a plurality of cameras 10 or photosensors to switch the irradiation direction, and the like is possible. May be inspected from multiple directions.

[Light diffusion mechanism of scratches]
A semi-permeable ground glass was used as a model for abrasion. Ground glass looks white under normal lighting in the dry state. This is because light is diffusely reflected by fine irregularities on the surface of the ground glass. In the case of the transmission, it looks white because it is diffusely transmitted.

  Moreover, when the ground glass is wetted with water, the light diffusibility becomes weak and the glass can be seen through. This is because water with a refractive index close to that of glass fills minute irregularities on the surface, and reflection at the interface between diffusible glass and water is reduced, resulting in a smooth air-water interface and glass. This is because transmission or reflection at the interface between air and air becomes dominant. That is, in the wet state, the light direct transmittance is higher than that in the dry state, and the light diffusing action due to the fine unevenness is reduced.

[Discussion]
When receiving diffused light, it is generally advantageous to receive light in a direction close to the original optical axis that does not diffuse (paraxial) because the amount of received light increases. In other words, if the surface has the same diffusion characteristics, the amount of directly transmitted light that is transmitted in the direction of incident light is compared with the amount of specularly reflected light that is reflected in the opposite direction to the direction of incident light. Is more advantageous because the amount of diffused light received is larger.

  In the case where the ground glass is wet, since the direct transmittance is high and the diffusion action is small, it is considered that the transmission diffused light reception is more advantageous than the diffuse reflection light reception.

[Experimental result]
A comparison experiment between the transmitted scattered light amount and the reflected scattered light amount using the ground glass by the present inventor will be shown below.

FIG. 7 shows an outline of the measurement of diffuse reflected light. A laser beam 27 having an intensity I ₀ = 800 μW is irradiated to the diffusion surface 4 of the ground glass 3 at a right angle, and the intensity of the diffusely reflected light received by the photosensor 12 arranged at 45 degrees with respect to the diffusion surface is measured. . Under these conditions, the diffusion surface of the ground glass 3 was measured for two types, a dry state and a wet state.

FIG. 8 shows an outline of measurement of transmitted diffused light. The intensity of the laser beam 27 is I ₀ = 800 μW, and this laser beam 27 is irradiated perpendicularly to the surface opposite to the diffusion surface 4 of the ground glass 3. The photo sensor 12 is disposed at a position of 45 degrees with respect to the diffusion surface of the ground glass 3 and measures the intensity of transmitted diffused light. Under these conditions, the diffused surface of the ground glass 3 was measured for two types, a dry state and a wet state, as in the case of diffusely reflected light.

The measurement results shown in FIGS. 7 and 8 are shown in the table of FIG. The unit of each numerical value is [μW]. From this table, the following conclusions can be drawn.
1. In the case of a diffusing surface of a ground glass, the intensity of transmitted diffused light is stronger than that of diffuse reflection (c> a).
2. If the diffusion surface is wet, the above 1. Is more conspicuous (d> b), and the light amount reduction (ratio) in the wet state with respect to the dry state is less transmitted and scattered than diffuse reflection (b / a <d / c).
Thus, from this experiment, assuming that the degree of scratching is the same as that of the diffusing surface of the ground glass, it is assumed that “the diffused light received by the scratch receives the diffuse diffused light rather than the diffusely reflected light. It is confirmed that the amount of light is large and advantageous, and this is more remarkable when the diffusion surface is wet.

  As described above, according to the present invention, the diffused light due to the scratches can be efficiently received by irradiating from the inside of the bag to the outside, which is good particularly when the bag is wet by washing. Inspection is possible.

  In this specification, the description has been made using a milk candy coated with a glass candy urethane, but the inspection object is not limited to a milk candy, and a semi-transparent candy or a color can be used as long as it is a light transmissive candy. It can also be applied to ridges marked with.

FIG. 1 is a diagram showing an outline of a flaw scratch inspection apparatus according to a first embodiment. FIG. 2 is a diagram showing an outline of a flaw scratch inspection apparatus according to the second embodiment. FIG. 3 is an image of a scratched sample obtained by the camera 10 in the second embodiment. FIG. 4 is a diagram showing an outline of a flaw scratch inspection apparatus according to the third embodiment. FIG. 5 is a diagram showing the incidence of the laser beam 27 through the trunk of the heel 1. FIG. 6 is a diagram showing the incidence of the line-shaped laser beam 27. FIG. 7 is a diagram showing an outline of measurement of diffuse reflected light using ground glass. FIG. 8 is a diagram showing an outline of measurement of transmitted diffused light using ground glass. FIG. 9 is a table showing the results of measurement using ground glass.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 壜, 2 ... Scratch possibility position, 3 ... Ground glass, 4 ... Diffusing surface, 10 ... Camera, 11 ... Image processing apparatus, 12 ... Photo sensor, 21 ... Lamp, 22 ... Lamp support part, 23 ... Light-shielding plate, 24 ... light guide, 25 ... light source box, 26 ... pedestal, 27 ... laser beam, 30 ... image processing area, 31 ... scratches

Claims (15)

A wrinkle inspection device that inspects the surface of a wrinkle for scratches,
Irradiating means for irradiating light traveling from the inside of the bag to the outside;
A light receiving means for receiving the light emitted by the irradiation means and diffused by scratches on the surface of the eyelid outside the eyelid;
Evaluation means for evaluating the presence or absence and degree of scratches on the surface of the ridge based on the output from the light receiving means;
A wrinkle inspection device characterized by comprising:   The wrinkle inspection apparatus according to claim 1, wherein the irradiating means is a substantially point light source disposed at a substantially central portion inside the wrinkle. Arranged between the irradiation means and the light receiving means;
A light shielding means for shielding light so that the light emitted by the irradiation means does not directly enter the light receiving means, and the light path from the scratched portion of the surface of the ridge to the light receiving means is provided. The wrinkle inspection apparatus according to claim 1, wherein the wrinkle inspection apparatus is characterized. A pedestal on which the bag is placed;
The irradiating means is a light source that irradiates light toward the bottom surface from the open mouth portion of the bag,
The light receiving means receives the light emitted by the irradiating means and diffused by the scratches on the surface of the eyelid after being irregularly reflected on the bottom surface of the eyelid or the pedestal surface. The wrinkle inspection apparatus according to claim 1.   The wrinkle inspection apparatus according to claim 4, wherein at least a part of the pedestal is formed of a light diffusive reflecting member in a region where the bottom surface of the wrinkle contacts.   The wrinkle inspection apparatus according to claim 1, wherein the irradiation unit irradiates a laser beam on an inner side of a scratch on the surface of the wrinkle.   The wrinkle inspection apparatus according to claim 6, wherein the irradiation unit is configured to irradiate the laser beam on an inner side of a scratch on the surface of the wrinkle by entering the laser beam through an opening of the wrinkle.   The wrinkle inspection apparatus according to claim 6, wherein the irradiating unit irradiates the inside of the surface of the wrinkle with the laser beam incident from a body portion of the wrinkle.   The scissors according to any one of claims 6 to 8, wherein the laser beam is formed in a line shape and irradiated so that a longitudinal direction thereof is a direction from an opening portion of the scissors toward a bottom surface portion. Inspection device.   10. A black wall for absorbing light is disposed at a position opposite to the light receiving means with respect to the ridge and at a predetermined distance from the ridge. The wrinkle inspection device according to any one of the above. The light receiving means is a camera provided with an area sensor,
The said evaluation means evaluates the presence or absence and grade of the abrasion of the surface of the said eyelid by evaluating about the predetermined area of the image image | photographed with the said camera, The Claim 1 characterized by the above-mentioned.壜 Inspection equipment. The light receiving means is a photosensor;
The wrinkle inspection apparatus according to any one of claims 1 to 10, wherein the evaluation unit evaluates the presence or absence and degree of scratches on the surface of the wrinkle based on the magnitude of an output signal of the photosensor.   The wrinkle inspection apparatus according to any one of claims 1 to 12, wherein the wrinkles are urethane-coated glass wrinkles.   The wrinkle inspection apparatus according to claim 1, wherein the wrinkle is wet with a cleaning liquid or water. A wrinkle inspection method for inspecting the surface of a wrinkle for scratches,
An illumination process for irradiating light from the inside of the basket to the outside;
A light receiving step of receiving the light emitted by the illumination step, the light diffused by scratches on the surface of the eyelid outside the eyelid,
Based on the output from the light receiving step, an evaluation step for evaluating the presence and extent of scratches on the surface of the heel,
A wrinkle inspection method characterized by comprising:

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