CN110987963A - Method for detecting surface defects of moving object with film - Google Patents
Method for detecting surface defects of moving object with film Download PDFInfo
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- CN110987963A CN110987963A CN201911357834.7A CN201911357834A CN110987963A CN 110987963 A CN110987963 A CN 110987963A CN 201911357834 A CN201911357834 A CN 201911357834A CN 110987963 A CN110987963 A CN 110987963A
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- moving object
- film
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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
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- 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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Signal Processing (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention especially relates to a surface defect detection method of a moving object with a film; the method comprises the following steps: the controller controls the first light source and the second light source to be turned off and turned on, controls the lens to focus on the upper surface of the film at the same time, and controls the camera to shoot the surface of the moving object with the film; step two: the controller controls the first light source to be turned on and the side lamp to be turned off, keeps the lens focused on the upper surface of the film, and controls the camera to shoot the surface of the moving object with the film; step three: the controller controls the first light source to be closed and controls the second light source to be opened, the side lamp is kept closed, the lens is controlled to be focused on the lower surface of the film, and then the camera is controlled to shoot the surface of the moving object with the film; step four: the processor analyzes and processes the shot image; the method for detecting the surface defect of the moving object with the film can avoid the false detection caused by taking the dust on the surface of the film and the defect of the film as the surface defect of the object, and improve the detection efficiency.
Description
Technical Field
The invention belongs to the field of optical detection, and particularly relates to a method for detecting surface defects of a moving object with a film.
Background
In the prior art, the defects of the moving object are generally found out by observing with human eyes under certain illumination, and in the mode, the workload of detection personnel is large, the detection is easy to miss, and the labor cost is high. Some moving object's surface pastes has the membrane, detects after need tear the membrane during detection, can lead to more dust to be stained with moving object surface like this. A conventional surface defect detecting apparatus includes a subject with a film amount, a light source unit for illumination, and a detection camera for capturing an image of the subject and performing image processing on the image captured via the detection camera to determine whether a surface defect of the subject exists.
The invention can detect the surface defects of the moving object with the film, has simple detection method and convenient detection, reduces the manual missing rate and the manual cost, and improves the detection efficiency. The invention can avoid the false detection caused by taking the dust on the surface of the film and the defects of the film as the surface defects of the moving object.
Disclosure of Invention
In order to detect defects on the surface of a moving object with a film, the method comprises the following steps:
the method comprises the following steps: the controller controls the first light source and the second light source to be turned off and turned on, controls the lens to focus on the upper surface of the film at the same time, and controls the camera to shoot the surface of the moving object with the film;
step two: the controller controls the first light source to be turned on and the side lamp to be turned off, keeps the lens focused on the upper surface of the film, and controls the camera to shoot the surface of the moving object with the film;
step three: the controller controls the first light source to be closed and controls the second light source to be opened, the side lamp is kept closed, the lens is controlled to be focused on the lower surface of the film, and then the camera is controlled to shoot the surface of the moving object with the film;
step four: the processor performs analysis processing on the captured image.
Further, the camera is a camera with a switchable focus lens, and the camera is located right above the moving object.
Further, the first light source is located above the moving object, and the second light source is located at a side of the moving object.
Further, the first light source and the second light source are both line light sources, and the side lamp is a line light lamp.
Furthermore, the side lights arranged on one side and/or two sides of the surface of the moving object form an included angle with the horizontal plane on which the moving object is positioned, which is less than 15 degrees.
Furthermore, the side lights arranged on one side and/or two sides of the surface of the moving object form an included angle of 5 DEG with the horizontal plane on which the moving object is arranged
Further, the camera is a line camera.
Further, the processor makes the 1 st, 4 th, 7.. n-2 times of shooting records of all the first step form a first image, makes the 2 nd, 5 th, 8.. n-1 times of shooting records of the second step form a second image, makes the 3 rd, 6 th, 9.. n times of shooting records of the third step form a third image, excludes the abnormal points in the first image and the second image from the third image, and judges the remaining abnormal points as the defects of the surface of the moving object to be detected.
By the scheme, the invention at least has the following advantages: the method can detect the surface defects of the object with the film, has a simple detection method, is convenient to detect, reduces the manual missing rate, reduces the labor cost, improves the detection efficiency, and can avoid the false detection caused by taking the dust on the surface of the film and the defects of the film as the surface defects of the object.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
1 lens 2 camera
3 first light source 4 second light source
5 moving object with film of side lamp 6
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example one
The method comprises the following steps: the controller controls the first light source and the second light source to be closed and the side lamps to be opened, controls a lens on a camera with the lens to focus on the surface of the moving object with the film, and controls the camera with the lens to shoot the surface of the moving object with the film under the control of the controller to obtain a scanning image of the surface of the moving object with the film;
step two: the controller controls the first light source to be turned on and the side lamp to be turned off, controls a lens on a camera with the lens to be focused on the surface of the moving object with the film, and controls the camera with the lens to shoot the surface of the moving object with the film under the control of the controller to obtain a scanning image of the surface of the moving object with the film;
step three: the controller controls the first light source to be closed, the second light source to be opened, the side lamp to be closed, the camera with the lens on the camera to focus on the surface of the moving object with the film, and the camera with the lens is controlled to shoot the surface of the moving object with the film under the control of the controller to obtain a scanning image of the surface of the moving object with the film;
step four: the processor performs analysis processing on the captured image.
The moving object in the above embodiment is a moving object with a film attached to the surface thereof, and therefore, a line-type camera is required to acquire image information, and therefore, the camera is a line camera, the first light source and the second light source are preferably line-shaped line light sources, and the surface of the moving object with the film is divided into a plurality of lines, wherein the camera with a switchable focusing lens is arranged right above the moving object, the side lamps are arranged at one side or two sides of the surface of the moving object with the film in a substantially horizontal position, and an angle of 15 degrees, preferably 5 degrees, is formed between the upper side of the moving object with the film and the horizontal direction. The sidelight is preferably also a linear light. The first light source is arranged at any position above the moving object as long as the first light source can clearly irradiate the upper surface of the film, and the second light source is arranged at a position on the side of the moving object and can clearly shoot the lower surface of the film.
The method comprises the following steps: the controller firstly controls the first light source and the second light source to be closed, controls a lens on the camera to be focused on the upper surface of the film after the side lamp is turned on, and then controls the camera to be opened for shooting and recording; step two: then the controller controls the side lamp to be turned off and the first light source to be turned on, and then the camera is controlled to be turned on for shooting and recording; step three: and then controlling to close the first light source and simultaneously turn on the second light source, controlling the lens to focus on the lower surface of the film, and then controlling the camera to turn on the shooting record. And then scanning the surface of the moving object from beginning to end according to the method, transmitting all the shot images into a processor, extracting all the records shot in the first step by the processor, namely extracting the 1 st, 4 th and 7 th shooting records to form a first image, extracting all the shot records shot in the second step, namely extracting the 2 nd, 5 th and 8 th shooting records to form a second image, extracting all the shot records shot in the third step, namely extracting the 3 rd, 6 th and 9 th shooting records to form a third image, eliminating abnormal points in the first image and the second image from the third image, and judging the remaining abnormal points as the defects of the surface of the object to be detected. The first image is taken to remove dust from the upper surface of the film. The second image was taken to exclude outliers on the film.
If the detection object is a static object, the camera with the lens can be controlled to move to scan the whole static object for detection, and the multiple cameras can be used for detecting the diversity defects on the surface of the object more accurately, so that the detection effect is better.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method for detecting surface defects of a moving object with a film is characterized by comprising the following steps:
the method comprises the following steps: the controller controls the first light source and the second light source to be turned off and turned on, controls the lens to focus on the upper surface of the film at the same time, and controls the camera to shoot the surface of the moving object with the film;
step two: the controller controls the first light source to be turned on and the side lamp to be turned off, keeps the lens focused on the upper surface of the film, and controls the camera to shoot the surface of the moving object with the film;
step three: the controller controls the first light source to be closed and controls the second light source to be opened, the side lamp is kept closed, the lens is controlled to be focused on the lower surface of the film, and then the camera is controlled to shoot the surface of the moving object with the film;
step four: the processor performs analysis processing on the captured image.
2. The method for detecting defects on the surface of a moving object with a film according to claim 1, wherein: the camera is a camera with a switchable focusing lens, and is positioned right above the moving object.
3. The method for detecting defects on the surface of a moving object with a film according to claim 1, wherein: the first light source is positioned above the moving object, and the second light source is positioned on the side of the moving object.
4. The method for detecting defects on the surface of a moving object with a film according to claim 1, wherein: the first light source and the second light source are both linear light sources, and the side lamp is a linear light lamp.
5. The method for detecting defects on the surface of a moving object with a film according to claim 1, wherein: the side lights arranged on one side and/or two sides of the surface of the moving object form an included angle of less than 15 degrees with the horizontal plane on which the moving object is positioned.
6. The method for detecting defects on the surface of a moving object with a film according to claim 5, wherein: the side lamps arranged on one side and/or two sides of the surface of the moving object form an included angle of 5 degrees with the horizontal plane where the moving object is located.
7. The method for detecting defects on the surface of a moving object with a film according to claim 1, wherein: the camera is a line array camera.
8. The method for detecting defects on the surface of a moving object with a film according to claim 1, wherein: the processor enables the first shooting records of 1 st, 4 th, 7.. n-2 times of the first step to form a first image, enables the second shooting records of 2 nd, 5 th, 8.. n-1 times of the second step to form a second image, enables the third shooting records of 3 rd, 6 th, 9.. n times of the third step to form a third image, eliminates abnormal points in the first image and the second image from the third image, and judges the remaining abnormal points as defects of the surface of the moving object to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357834.7A CN110987963A (en) | 2019-12-25 | 2019-12-25 | Method for detecting surface defects of moving object with film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357834.7A CN110987963A (en) | 2019-12-25 | 2019-12-25 | Method for detecting surface defects of moving object with film |
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| Publication Number | Publication Date |
|---|---|
| CN110987963A true CN110987963A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911357834.7A Pending CN110987963A (en) | 2019-12-25 | 2019-12-25 | Method for detecting surface defects of moving object with film |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07311160A (en) * | 1994-05-19 | 1995-11-28 | Nitto Denko Corp | Method and device for preforming visual inspection |
| US20050122508A1 (en) * | 2003-10-31 | 2005-06-09 | Sachio Uto | Method and apparatus for reviewing defects |
| CN101360990A (en) * | 2006-01-11 | 2009-02-04 | 日东电工株式会社 | Layered film fabrication method, layered film defect detection method, layered film defect detection device, layered film, and image display device |
-
2019
- 2019-12-25 CN CN201911357834.7A patent/CN110987963A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07311160A (en) * | 1994-05-19 | 1995-11-28 | Nitto Denko Corp | Method and device for preforming visual inspection |
| US20050122508A1 (en) * | 2003-10-31 | 2005-06-09 | Sachio Uto | Method and apparatus for reviewing defects |
| CN101360990A (en) * | 2006-01-11 | 2009-02-04 | 日东电工株式会社 | Layered film fabrication method, layered film defect detection method, layered film defect detection device, layered film, and image display device |
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Application publication date: 20200410 |