CN111721774A - Lamp inspection detection method for automatic lamp inspection machine - Google Patents
Lamp inspection detection method for automatic lamp inspection machine Download PDFInfo
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- CN111721774A CN111721774A CN202010581681.0A CN202010581681A CN111721774A CN 111721774 A CN111721774 A CN 111721774A CN 202010581681 A CN202010581681 A CN 202010581681A CN 111721774 A CN111721774 A CN 111721774A
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- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 238000007689 inspection Methods 0.000 title claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 230000001502 supplementing effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 239000012780 transparent material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 19
- 230000003287 optical effect Effects 0.000 abstract description 7
- 238000003384 imaging method Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 11
- 239000011521 glass Substances 0.000 description 8
- 210000004081 cilia Anatomy 0.000 description 5
- 239000003814 drug Substances 0.000 description 5
- 238000005286 illumination Methods 0.000 description 5
- 239000003978 infusion fluid Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000013334 alcoholic beverage Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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Abstract
The invention discloses a lamp inspection detection method for an automatic lamp inspection machine, which belongs to the technical field of detection of pharmaceutical equipment, comprises a light source for supplementing light to a light-permeable container and a camera for acquiring images of the light-permeable container, and comprises the following detection steps: 1) the light of the light source irradiates the light-permeable container, so that the liquid in the light-permeable container is highlighted in the area irradiated by the light source to form a liquid luminous source, and other liquid areas in the container are illuminated by the light of the liquid luminous source; 2) the camera captures images of the area within the light permeable container that is not the liquid light emitting source. The invention forms a brand new optical system, has the advantages of backlight anti-interference and clear imaging contrast of the bottom light to white or transparent impurities, realizes the effect of bottom light irradiation by using a back light source, can effectively avoid interference while ensuring the detection effect, and can completely eliminate the field blind area.
Description
Technical Field
The invention belongs to the technical field of pharmaceutical equipment, and particularly relates to a light inspection detection method for an automatic light inspection machine.
Background
The full-automatic lamp inspection machine is used for detecting visible foreign matters of medicines produced by pharmaceutical factories. The existing light inspection machine basically detects foreign objects in the liquid medicament based on polishing from the bottom of a bottle and taking pictures by a camera from the side surface; or the solution of lighting the back of the bottle and taking a picture of the opposite side by a camera. The advantages and disadvantages of these two schemes are as follows:
polishing the bottom of the bottle: the light source irradiates the surface of the foreign matter, the foreign matter reflects the light source to the outside, and the represented image features are brighter than the blank area. The scheme has good detection effect on micro foreign matters, white blocks, cilia and other foreign matters. The disadvantage is too much interference and the presence of blind spots. The light source can form a mirror effect on the surface of the liquid, and when the liquid surface shakes, a moving bright spot exists at the bottom of the liquid; the light source is diffused and cannot be controlled to be exactly consistent with the diameter of the bottle, and the light source can be expanded to the peripheral bottle, so that light interference exists at the boundary of the bottle; due to the direct irradiation of the bottom and the reflection effect of the liquid level, the imaging is generally that the bottom and the vicinity of the liquid level are high in brightness, the middle area is dark, the vicinity of the liquid level and the white area at the bottom cannot be detected, and the middle area is not high in brightness and obvious in image characteristics, so that detection is missed.
Polishing the back of the bottle: when the light source penetrates through the bottle, if foreign matters exist, part of the light source can be shielded, and the represented image characteristics are darker than the blank area. The scheme has the advantages of strong anti-interference capability and good detection effect on dark foreign matters. The defect is that the detection effect on foreign matters such as cilia, small glass, white blocks and the like is poor, because the foreign matters are very fine or are myopia and transparent, corrosion can exist under backlight to cause complete invisibility, or a light source can directly penetrate through the foreign matters and is not obvious in comparison with the peripheral area, so that detection omission is caused.
Disclosure of Invention
Aiming at the problems, the invention provides a light inspection detection method for an automatic light inspection machine, which forms a brand new optical system, realizes the effect of bottom light irradiation by using a back light source, and can effectively avoid interference while ensuring the detection effect; meanwhile, based on the optical system, a regional layering technology is provided, a view field blind area can be completely eliminated, and the advantages of backlight interference resistance and clear imaging contrast of bottom light to white or transparent impurities are achieved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a light inspection detection method for an automatic light inspection machine comprises a light source for supplementing light to a light-permeable container and a camera for collecting images of the light-permeable container, and comprises the following detection steps:
1) the light of the light source irradiates the light-permeable container, so that the liquid in the light-permeable container is highlighted in the area irradiated by the light source to form a liquid luminous source, and other liquid areas in the container are illuminated by the light of the liquid luminous source;
2) the camera carries out image acquisition to the region of non-liquid light emitting source in the light-permeable container, realizes the foreign matter and detects.
As a further improvement of the technical scheme, before the camera collects images, the light-permeable container is controlled to spin through the light inspection machine and then stops rotating, so that the liquid in the light-permeable container continues to move under the action of inertia, and then the camera collects images of the liquid in the light-permeable container.
As a further improvement of the technical scheme, the camera is an area-array camera.
As a further improvement of the technical scheme, the light-permeable container is made of transparent materials or semitransparent materials.
As a further improvement of the technical scheme, light of the light source is supplemented to the transparent container after the light direction is changed through the prism, the lens or the mirror.
As a further improvement of the technical scheme, the light source and the camera are arranged in a staggered mode.
As a further improvement of the technical scheme, the light source and the camera are at different height positions.
As a further improvement of the technical scheme, at least two light sources are arranged and distributed at intervals, and the light sources sequentially emit light in turn; at least one camera is arranged; the camera detects the upper or lower area illuminated by the corresponding liquid lighting source.
As a further improvement of the technical scheme, the light source is of a horizontally arranged strip-shaped structure.
As a further improvement of the technical scheme, the light-emitting surface of the light source is a plane or a circular arc.
As a further improvement of the technical solution, the light source (3) irradiates the light-permeable container (1) parallel to the horizontal plane.
As a further improvement of the technical proposal, the light source (3) irradiates the light-permeable container (1) upwards or downwards inclined to the horizontal plane.
Compared with the prior art, the invention has the advantages that:
1. the strip-shaped backlight layout can be mechanically fixed at any height, is equivalent to mounting the bottom light at any height position of a sample to be detected, and can ensure that the bottle body has no dead angle after being combined with the multilayer layout;
2. the illumination mode is changed, the liquid level is directly irradiated without light, and the mirror effect can be eliminated; the bottle bottom has no obvious reflection of the liquid level, so that the false detection can be effectively eliminated; when the bottom light is adopted, an overexposure blind area which cannot be detected near the liquid level can also be detected;
3. the device has the advantages of bottom light and detection of tiny foreign matters and semitransparent foreign matters; the detection effect on foreign matters such as cilia, small glass, white blocks and the like is obvious;
4. the non-divergent light source irradiates the bottles on the left side and the right side, so that the foreign matter detection has interference;
drawings
FIG. 1 is a schematic diagram of an embodiment of an upper light source activated for a two light source-one camera;
FIG. 2 is a schematic diagram of an embodiment of a lower light source activated when two light sources are used with one camera;
FIG. 3 is a schematic diagram of an embodiment of an upper camera for two light sources and two cameras;
FIG. 4 is a schematic view of an embodiment of a lower camera for two light sources and two cameras;
FIG. 5 is a graph showing the effect of detecting white cilia defect of about 2mm in a large infusion solution of 250ml in a glass bottle.
In the figure: 1. a light permeable container; 2. a liquid light emitting source; 3. a light source; 4. a camera.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention in any way.
Referring to fig. 1-5, in one embodiment,
a light inspection detection method for an automatic light inspection machine comprises a light source 3 for supplementing light to a light-permeable container 1 and a camera 4 for collecting images of the light-permeable container 1, and comprises the following detection steps:
1) the light of the light source 3 irradiates the light-permeable container 1, so that the area of the liquid in the light-permeable container 1 irradiated by the light source is highlighted to form a liquid luminous source 2, and the other liquid areas in the container 1 are illuminated by the brightness of the liquid luminous source 2; as shown in fig. 1, the background of the liquid light-emitting source 2 is white, and the backgrounds of the upper and lower regions of the liquid light-emitting source 2 are black.
2) The camera 4 collects images of the region of the light-permeable container 1 other than the liquid light-emitting source 2, thereby detecting foreign matter. When the camera 4 photographs the area illuminated by the liquid light emitting source 2, the foreign matter in the area is white under illumination because of the black background, so that the image photographed by the camera can clearly display the foreign matter, and the accuracy can be improved. As shown in FIG. 5, the detection effect of white cilia defect of about 2mm in a large infusion solution of 250ml glass bottle is shown.
In a preferred embodiment, before the camera 4 collects images, the light-permeable container 1 is controlled to spin by the light inspection machine, and then the rotation is stopped, so that the liquid in the light-permeable container continues to move under the action of inertia, and then the camera 4 collects images of the liquid in the light-permeable container 1.
In a preferred embodiment, the camera 4 is an area-array camera.
In order to make the light of the light source irradiate into the liquid in the container, in a preferred embodiment, the light-permeable container 1 is made of transparent material or semitransparent material.
In a preferred embodiment, the light from the light source 3 is used to fill the light-permeable container 1 with light after the direction of the light is changed by a prism or a lens or a mirror. The light from the light source 7 only needs to be able to irradiate into the liquid in the container, and the direction of the light source is changed by a special prism, lens or optical device, so as to finally achieve the effect consistent with the scheme.
The light source is not limited by the combination of cameras, such as a plurality of cameras distributed from left to right or up and down, or one or more cameras irradiating at an angle, or a linear array camera for picking up images are protected by the patent.
The detection area of this patent is unrestricted, and the liquid level, the surface and the inside foreign matter of bottle end, body all are listed in this scheme protection scope.
In order to prevent the light source 3 from directing the camera directly to cause the background of the image to be whitened, in a preferred embodiment, the light source 3 is arranged offset from the camera 4.
For ease of detection, a preferred embodiment has the light source 3 at a different height position than the camera 4. The light source 3 and the camera 4 may also be in different vertical planes.
As shown in fig. 1-2, in a preferred embodiment, at least two light sources 3 are arranged, distributed at intervals, and sequentially emit light in turn; at least one camera 4 is arranged; the camera 4 detects the upper or lower area illuminated by the corresponding liquid lighting source 2. After the different cameras 4 shoot the images corresponding to the upper and lower regions of the liquid luminous source 2, the images are integrated together through a computer. Mainly gather to the light-permeable container that the volume is great, improve the detection accuracy rate to big light-permeable container foreign matter.
In a preferred embodiment, the light source 3 is a horizontally arranged strip structure. The light source 3 is in a strip shape in a horizontal plane, and after the light source irradiates the light-permeable container, a thin light-emitting layer can be formed in the light-permeable container, so that the light noise influence caused by a white background is reduced.
In a preferred embodiment, the light emitting surface of the light source 3 is a plane or a circular arc.
In a preferred embodiment, the camera 4 is a high frame rate camera.
In a preferred embodiment, the light source 3 illuminates the light permeable container 1 parallel to the horizontal plane. When the light source 3 illuminates the light permeable container 1 parallel to the horizontal plane, the liquid light emitting source 2 is generated to illuminate both upper and lower regions in the liquid, so that both upper and lower regions can be photographed by a camera for foreign matter detection.
In a preferred embodiment, the light source 3 illuminates the light-permeable container 1 upwards or downwards in a horizontal plane. When the light source 3 is inclined downward to the horizontal plane to irradiate the light-permeable container 1, for example, when the inclination angle is 10 degrees, the generated liquid light-emitting source 2 can illuminate all the lower regions in the liquid, and the upper region is in a completely black state, so that the interference of the liquid level in the upper region can be shielded.
When the light source 3 is inclined upwards to the horizontal plane to irradiate the light-permeable container 1, for example, when the inclination angle is 10 degrees, the generated liquid light-emitting source 2 can illuminate the upper area in the liquid, and the lower area is in a completely black state, so that the interference of the liquid level in the upper area can be shielded.
Preferably, the light emitting direction of the liquid light source can be controlled by modifying the angle between the light source and the object to be detected. Interference of shield part area such as liquid level; for example, the light source is inclined to the horizontal plane to irradiate the container downwards, so that the area above the liquid luminous source 2 is in a full black state, and the interference of the liquid level in the upper area can be shielded.
The design principle of the invention is as follows:
the invention designs a brand-new optical system, realizes the effect of bottom light irradiation by using a back light source, and can effectively avoid interference while ensuring the detection effect; meanwhile, based on the optical system, a regional layering technology is provided, and a view field blind area can be completely eliminated.
As shown in fig. 1, wherein the light source is a bar or other narrow shaped backlight; the middle area is a liquid medicament bottle to be detected; and the right side is an industrial camera used for collecting the image of the liquid bottle to be detected.
During detection, the back light source is adjusted to be high in brightness and irradiates the detection bottle in parallel, the liquid area is highlighted by the light source, and the liquid area is equivalent to a surface light source with the diameter consistent with that of the bottle body and is called a liquid luminous source later. The liquid light source will shine light both up and down, which is itself equivalent to the bottom light of the diameter of a bottle mounted in that area. The foreign body irradiated by the liquid luminous source can reflect the light source to the outside, presents a high-brightness characteristic, and can be effectively detected after the rotation-stop detection principle of the light inspection machine is combined.
After the right camera receives the image, the area where the liquid luminous source is located is not detected, and only the upper area and the lower area which are irradiated by the liquid luminous source are detected; since the liquid light emitting source appears fully white on the image, this area is undetectable.
Before the camera collects images, the light-permeable container is controlled to spin through the light inspection machine, then the rotation is stopped, so that the liquid in the light-permeable container continues to move under the action of inertia, and then the camera collects the images of the liquid in the light-permeable container.
The first scheme is as follows: a high frame rate camera is used, and 2 light sources are arranged and distributed up and down respectively, as shown in fig. 3-4. The upper light source and the lower light source are alternately lightened, and when the upper light source is lightened, the lower half part area is detected; when the lower light source is bright, the upper half area is detected, and the whole area coverage of the bottle body can be realized after the two areas are combined without any dead angle.
Scheme II: a plurality of cameras are arranged in the vertical direction, each camera only acquires images of partial areas, and the plurality of cameras are combined to form a whole area coverage, as shown in fig. 3-4; the upper light source and the lower camera, and the lower light source and the upper camera form two sets of optical acquisition systems. When the upper light source is on, the lower camera collects light, and when the lower light source is on, the upper camera collects light; the full coverage of the detection area can be realized by the staggered acquisition of the camera and the light source.
According to the scheme, the camera and the light source have no logical relationship, are not limited to one-to-one, have any pairing relationship, and can be dynamically configured according to actual application scenes:
multiple light sources to one camera: in order to ensure that the illumination of a certain area of the bottle is sufficient, light sources are possibly arranged on the upper area and the lower area of the area, the light sources are simultaneously turned on and off to ensure that the illumination is sufficient, and images are collected through a camera at the other end.
One light source for multiple cameras: taking the layout of fig. 1 as an example, a light source can be arranged on the left side, 2 cameras are arranged on the right side, one camera is used for detecting internal foreign matters in a head-up mode, the other camera is used for detecting liquid level foreign matters in an oblique mode, and one light source corresponds to a plurality of cameras at the same time.
Multiple light sources to multiple cameras: the method integrates the use of one camera by a plurality of light sources and the use of a plurality of cameras by a light source, and can adopt a plurality of light sources to a plurality of cameras for a relatively complex application scene, and the detection purpose is realized by freely combining the light sources and the cameras.
For a bottle with large capacity and height, when 2 light sources cannot meet the requirements; full coverage can be achieved by adding more bar light sources at different height levels, with a higher frame rate camera, or with more cameras.
1. The material of this patent detection target is not restricted to glass, and all can the printing opacity or semi-transparent material, for example: glass, plastic, film products, etc., are all within the scope of this patent.
2. This patent is not restricted to liquid medicament, and the kind and the trade of detection target are not restricted, and typical product is such as: ampoules, oral liquid, glass infusion solutions, plastic infusion solutions, soft infusion solutions, joint-discharge liquid medicines, various water beverages, alcoholic beverages, health-care beverages and the like are protected by the present patent.
3. The shape of the back light source is not limited, and various light sources with various shapes and various parameters are protected by the patent;
4. the control mode of the light source is not limited, and various light source control modes such as normally bright, stroboscopic and timing triggering are protected by the patent;
5. the light source layering is not limited, a plurality of light sources irradiate to layer the liquid in the container, and the detection area is divided into one to more layers which are all protected by the patent;
6. the light source is not limited by the color and wavelength of the light source, and various wavelengths and colors of the light source are protected by the patent;
7. the light source is not limited by the combination of cameras, such as a plurality of cameras distributed left and right or up and down, or a single or a plurality of cameras for angular irradiation, or a linear array camera for image acquisition are protected by the patent;
8. the detection area of this patent is unrestricted, and the liquid level, the surface and the inside foreign matter of bottle end, body all are listed in this scheme protection scope.
9. The patent is unrelated to the sequence of the lightening of a plurality of light sources, and various lightening methods are protected by the patent.
10. No matter the camera and the light source are arranged at any position and any angle around the detected object, the protection of the patent is also included as long as the same or similar illumination effect of the patent is realized.
11. The glass or plastic bottle wall in the air area of the irradiation bottle body shines brightly, which is equivalent to an annular light source, the actual effect is poor, but the similar effect can be achieved, and the protection of the patent is also listed.
12. The application of one-to-many, many-to-one and many-to-many between the camera and the light source is only an example, any camera and light source are matched for use, the basic principle is that the light source and the camera are used in a staggered mode, and the usage that liquid is changed into the light source is protected.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures shown in the drawings, and it will be apparent to those skilled in the art that various changes, modifications, or alterations can be made therein without departing from the principles of the invention; such modifications, variations, or combinations, or other uses of the inventive concept and techniques as applied to other uses without modification, are intended to be included within the scope of the present invention.
Claims (10)
1. A light inspection detection method for an automatic light inspection machine, comprising a light source (3) for supplementing light to a light-permeable container (1) and a camera (4) for capturing images of the light-permeable container (1), characterized by comprising the following detection steps:
1) the light of the light source (3) irradiates the light-permeable container (1) to enable the liquid in the light-permeable container (1) to be highlighted in the area irradiated by the light source to form a liquid luminous source (2), and the other liquid areas in the light-permeable container (1) are illuminated by the brightness of the liquid luminous source (2);
2) the camera (4) collects images of the area of the non-liquid luminous source (2) in the light-permeable container (1) to realize foreign body detection.
2. A light detection method for an automatic light detector according to claim 1, characterized in that the camera (4) is an area-array camera.
3. The light detection method for the automatic light detector according to claim 1, wherein the light-permeable container (1) is made of a transparent material or a translucent material.
4. The light inspection method for the automatic light inspection machine according to claim 1, wherein the light of the light source (7) is supplemented to the light-permeable container (1) after the light direction is changed by a prism, a lens or a mirror.
5. The light inspection method for the automatic light inspection machine according to claim 1, wherein the irradiation surface of the light source (3) and the photographing surface of the camera (4) are staggered with each other.
6. A light detection method for an automatic light detector according to claim 5, characterized in that the light source (3) and the camera (4) are at different height positions.
7. The light inspection method for the automatic light inspection machine according to claim 1, wherein at least two light sources (3) are arranged and distributed at intervals, and sequentially emit light in turn; at least one camera (4) is arranged; the camera (4) detects the upper or lower area illuminated by the corresponding liquid luminous source (2).
8. The light inspection method for the automatic light inspection machine according to claim 1, wherein the light source (3) is in a shape of a bar or a circular arc.
9. A light detection method for an automatic light detector according to claim 1, characterized in that the light source (3) illuminates the light permeable container (1) parallel to the horizontal plane.
10. The light inspection method for the automatic light inspection machine according to claim 1, wherein the light source (3) irradiates the light permeable container (1) upward or downward inclined to a horizontal plane.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630173A (en) * | 2020-12-04 | 2021-04-09 | 闪优智谱(厦门)检测科技有限公司 | Chemical composition analysis system |
| CN117571731A (en) * | 2024-01-16 | 2024-02-20 | 山东鹰眼机械科技有限公司 | Impurity detection method and system based on lamp inspection machine |
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