CN102944561A - Appearance detection method and device of matrix type small device - Google Patents
Appearance detection method and device of matrix type small device Download PDFInfo
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- CN102944561A CN102944561A CN2012104655056A CN201210465505A CN102944561A CN 102944561 A CN102944561 A CN 102944561A CN 2012104655056 A CN2012104655056 A CN 2012104655056A CN 201210465505 A CN201210465505 A CN 201210465505A CN 102944561 A CN102944561 A CN 102944561A
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Abstract
The invention relates to an appearance detection method and an appearance detection device of a matrix type small device. The appearance detection device comprises a moving platform, an industrial camera and a zooming and scanning component consisting of an F-Theta lens, a galvanometer motor with a reflecting lens and a focusing lens, wherein the F-Theta lens is fixedly arranged just above the moving platform; the galvanometer motor, the focusing lens and the industrial camera are arranged on one horizontal plane and are arranged from front to rear in sequence; the galvanometer motor is fixedly arranged above the F-Theta lens; the reflecting lens is arranged just above the central line of the F-Theta lens and forms a variable inclination angle with the horizontal plane; and the center of the reflecting lens, the center of the focusing lens and the center of the industrial camera are on one straight line. Through sequential image extraction, zooming photographing and detection steps, the detection of each element in the matrix type small device is realized. The appearance detection method and the appearance detection device have the advantages of high detection speed, high accuracy, low device cost and extreme suitability for industrial application.
Description
Technical field
The present invention relates to the outward appearance detection technique, specifically relate to a kind of appearance detecting method and device of matrix form gadget.
Background technology
At present in industrial processes, the more and more miniaturization of device of producing, the product of producing like this, when the information such as printing mark or model, be easy to produce the skew in printing position, perhaps in manufacture process, cause the product appearance defectiveness, the manufacturer is flowed out factory in order to prevent the defective defective products of outward appearance, must set up product appearance and detect department, comes the defective defective products of special detection outward appearance.The means that detect at present the defective of miniature workpiece outward appearance have by artificial visually examine and camera video detection two schemes.
The artificial visually examine is little for plant capacity, product size is a kind of effective and economic solution greater than 10 millimeters workpiece, but produce the factory that surpasses thousands of products for every day, the detection workman who needs along with the product of producing every day just more more, cause so the significantly lifting of production cost and handling cost.
Camera video detects large for the automated production amount, and any products size all is reliable and economic scheme.Generally all be to move workpiece for measurement to camera position by servo or linear electric motors, wait for after vibrations are stablized and capture comparison.If the rectangular piece of the 2x1 mm in size of 35 row, 70 row is arranged on the rectangular piece of a 70x70mm size.Present camera video detection scheme has following several:
1) adopting viewing area is greater than the 2x2 millimeter, and resolution is that the camera of 1024x 768 shows each workpiece, and the motion platform by xy makes mobile camera moving arrive each above the workpiece, grasps the image of a workpiece at every turn.The advantage of this scheme is that precision is high, reaches the precision of each pixel 0.0019-0.0026 millimeter.Shortcoming is that positioning time is oversize, and efficient is too slow, and on average each workpiece needs 300-1000ms positioning time.If an equipment was produced 1000 such workpiece in one day 24 hours, one has 1000x35x70=2450000 small workpiece, detect these small workpiece and need 204 hours, the production equipment that is to say a rectangle gadget needs about 9 checkout equipments supportingly could to satisfy production requirement, and this is a huge burden for manufacturer.
2) adopting viewing area is greater than 70 millimeters, and resolution is that 2048 line-scan digital camera shows each workpiece, by motion platform mobile camera moving is arrived above every row workpiece, grasps the image of a row workpiece at every turn, is partitioned into the image of each workpiece by software.The advantage of this scheme is that speed is fast.Shortcoming is that precision is too low, can only accomplish the precision of 0.03 millimeter of each pixel, is that 4096 line-scan digital camera just can only reach the precision of 0.015 millimeter of each pixel if camera adopts resolution, if adopt more high-resolution line-scan digital camera cost just too high again.
Therefore the such situation of domestic production producer generally all is that the artificial visually examine detects at present, joins more than ten workman by an equipment and comes manual detection, and such result is that efficient is extremely low, and error rate is very high and cost is also high.
3) adopting viewing area is greater than 70 millimeters, and resolution is that the area array cameras more than 8192 shows whole workpiece, for the clear picture that makes whole zone also must be used special-purpose high-quality camera lens.Such technical scheme once just can grasp the image of whole workpiece, speed is also than comparatively fast, precision can reach the precision of 0.0075 millimeter of each pixel, but shortcoming is that camera and camera lens are very expensive, and image imaging is very unrealistic to the very high practical application of requirement of illumination.
Summary of the invention
The appearance detecting method that the purpose of this invention is to provide the matrix form gadget that a kind of accuracy is high, detection efficiency is high.
Another object of the present invention provides a kind of appearance delection device of using the matrix form gadget that said method detects.
For reaching above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of appearance detecting method of matrix form gadget carries out shot detection behind the image of scioptics scanning amplification matrix formula gadget again, comprising:
Extract the image operation, extract and once amplify the image of workpiece to be detected with the F-Theta lens;
The amplifying camera operation, the reflecting optics by galvanometer motor carries out the image transmitting of workpiece to be detected in the focus lamp after secondary amplifies, and is sent in the sensor of industrial camera to make a video recording again;
Detect operation, the outward appearance that the workpiece image that contrast is taken is stipulated detects.
The present invention also can further realize by following scheme:
The appearance detecting method of described matrix form gadget, wherein, described F-Theta lens extract image by row, extract a workpiece image in the column matrix formula gadget at every turn.
The appearance detecting method of described matrix form gadget, wherein, described matrix form gadget is installed in the straight line motion platform, by linear motion platform with the first row of matrix form gadget move to the F-Theta lens under, then rotating each workpiece that the angle of galvanometer motor extracts in the first row successively detects, after having detected first row, mobile material folding motion platform carries out the detection of following workpiece successively until finish again.
The appearance detecting method of described matrix form gadget, wherein, described detection operation is to detect the workpiece outward appearance by the image that image processing software contrasts each small workpiece whether to have defective.
The device that a kind of outward appearance of matrix form gadget detects comprises motion platform and industrial camera, and it also comprises the magnified sweep assembly that forms by the F-Theta lens, with galvanometer motor and the focus lamp of reflecting optics; The F-Theta lens be fixedly mounted on motion platform directly over; Galvanometer motor, focus lamp and industrial camera are arranged on the surface level, are arranged in order according to vertical order; Galvanometer motor is fixedly mounted on the top of F-Theta lens, its reflecting optics be located at the F-Theta central line of lens directly over and and surface level between be the inclination angle of angle variable; The center of the center of reflecting optics, the center of focus lamp and industrial camera point-blank.
The appearance delection device of described matrix form gadget, wherein, described industrial camera connects an image processing part, the image of image processing part after with the amplification of obtaining in the industrial camera sensor, whether qualified criterion with reference to regulation compares, and whether the gadget outward appearance of judging detection is qualified.
The appearance delection device of described matrix form gadget, wherein, described motion platform is installed on the straight line slide unit of a side direction with linear electric motors, and linear electric motors drive motion platform along straight line slide unit straight ahead.
The appearance delection device of described matrix form gadget, wherein, described straight line slide unit is fixedly mounted on one and is fixed on the board on ground; The side of slide unit top is equipped with the fixedly mounting bracket of magnified sweep assembly and industrial camera.
The appearance delection device of described matrix form gadget, wherein, the pixel of described industrial camera is more than or equal to 1,000,000.
During concrete the use, the user can be placed on the matrix form gadget that needs detect above the material folding motion platform and (can manually place, also can automatically place).Moving handle workpiece movable by linear electric motors is to the below of F-Theta lens, make the 1st row workpiece centre of matrix form gadget to be detected and the center-aligned of F-Theta lens, the reflection of the reflecting optics by galvanometer motor, can be image one by one the sensor the inside that be transferred to industrial camera of matrix form gadget when all workpiece in prostatitis, the image of transmission through after F-Theta lens and the amplification of focus lamp two arrangement of mirrors sheets, can make the image that observes amplify 10-50 doubly successively.Can detect by the image that image processing software contrasts each small workpiece so whether defectiveness of workpiece outward appearance.After having detected current this row workpiece, linear electric motors are mobile more forward the material folding motion platform, next column moved to continue to detect next column below the center of F-Theta lens, and cycle detection is complete all row inspections like this.
Owing to having adopted above technical scheme, the appearance detecting method of matrix form gadget of the present invention and device change the direction of light by the galvanometer motor with reflecting optics, thereby each workpiece in each row all is transferred on the sensor of industrial camera.Because the locating speed of galvanometer motor is up to 70000mm/s.Thereby realized less than 10ms, greatly having improved work efficiency the positioning time of each workpiece.And combine by F-Theta lens and focus lamp, realize twice amplification, thereby the image of small workpiece is amplified 10-50 doubly, Effective Raise the precision that detects, accuracy of detection is high, error rate is low.
The present invention is owing to having adopted the magnified sweep assembly that forms by the F-Theta lens, with galvanometer motor and the focus lamp of reflecting optics, thereby outward appearance detects to need not to use the too high industrial camera of resolution can carry out effectively, the pixel of camera can realize clear effective detection about 1,000,000, cost is lower.
Description of drawings
Fig. 1 is the structural representation of the appearance delection device of matrix form gadget of the present invention.
Embodiment
Embodiment 1
Referring to shown in Figure 1, a kind of appearance delection device of matrix form gadget comprises motion platform 5, the magnified sweep assembly and the industrial camera 1 that form by F-Theta lens 4, with galvanometer motor 3 and the focus lamp 2 of reflecting optics.Motion platform 5 is slidingly mounted on the straight line slide unit of a side with linear electric motors, and the straight line slide unit is fixedly mounted on the board that fixes on the ground.Also be installed with the support of an installation magnified sweep assembly and industrial camera on the board.Support is fixed on the side of straight line slide unit.Support is the T-shaped structure of class that is comprised of a transverse slat and a riser, transverse slat be positioned at slide unit directly over, offer the mounting hole that faces slide unit on it, the part that riser is positioned at transverse slat top also offers mounting hole, being centered close on the vertical plane of the mounting hole on the riser and transverse slat mounting hole.F-Theta lens 4 are fixedly mounted in the mounting hole of transverse slat.Galvanometer motor 3, focus lamp 2 and industrial camera 1 are arranged on the surface level, are arranged in order according to vertical order.Galvanometer motor 3 is fixedly mounted on the transverse slat, is positioned at the top of F-Theta lens 4, its reflecting optics be located at F-Theta lens 4 center lines directly over and and surface level between be the adjustable inclination angle of angle; Focus lamp 2 is fixedly mounted on the riser mounting hole, is located at the top of transverse slat, and industrial camera is fixedly mounted on the back side of riser.The center of the center of the center of reflecting optics, focus lamp 2 and industrial camera 2 point-blank.
Further, industrial camera 1 can connect an image processing part, and the image of image processing part after with the amplification of obtaining in the industrial camera sensor compares with reference to the whether qualified criterion of regulation, and whether the gadget outward appearance of judging detection is qualified.
Industrial camera of the present invention, focus lamp, galvanometer motor and F-Theta lens all can adopt existing commercially available prod.Can adopt industrial camera about any mega pixel such as industrial camera, best little formula MVC1000 camera, the resolution 1024x768 of adopting.The focus lamp that focus lamp 2 can adopt Nanjing wavelength company to produce, its operation wavelength is 640nm, focal length is 250mm.Galvanometer motor 3 can adopt the GO28 of gold orange scarabaeidae skill production or 6230 galvanometer motors of CTI company.The operation wavelength that F-Theta lens 4 can adopt Nanjing wavelength company to produce is 1064nm, and sweep limit is the F-Theta lens of 100mm.
Embodiment 2
A kind of appearance detecting method of matrix form gadget carries out shot detection behind the image by multiple lens scanning amplification matrix formula gadget again, comprising:
Extract the image operation, extract and once amplify the image of workpiece to be detected with the F-Theta lens;
The amplifying camera operation, the reflecting optics by galvanometer motor carries out the image transmitting of workpiece to be detected in the focus lamp after secondary amplifies, and is sent in the sensor of industrial camera to make a video recording again;
Detect operation, the outward appearance that the workpiece image that contrast is taken is stipulated detects.
During concrete the use, the F-Theta lens extract image by row, extract a workpiece image in the column matrix formula gadget at every turn.The matrix form gadget can be installed in the motion platform 5 described in the embodiment 1, by linear electric motors 6 with the first row of the matrix form gadget in the motion platform 5 along slide unit move to the F-Theta lens under, then rotating each workpiece that the angle of galvanometer motor 3 extracts in the first row successively detects, after having detected first row, mobile material folding motion platform carries out the detection of following workpiece successively until finish again.
Detecting the best in the operation and be the image that contrasts each small workpiece by an image processing software detects the workpiece outward appearance and whether has defective.This image processing software can adopt MIL or SAPERA image processing software.
The above is preferred embodiment of the present invention only, is not that the present invention is done any pro forma restriction.Any change that is equal to, modification or differentiation etc. that all those skilled in the art utilize technical scheme of the present invention that above-described embodiment is made all still belong in the scope of technical solution of the present invention.
Claims (9)
1. the appearance detecting method of a matrix form gadget carries out shot detection behind the image of scioptics scanning amplification matrix formula gadget again, it is characterized in that:
Extract the image operation, extract and once amplify the image of workpiece to be detected with the F-Theta lens;
The amplifying camera operation, the reflecting optics by galvanometer motor carries out the image transmitting of workpiece to be detected in the focus lamp after secondary amplifies, and is sent in the sensor of industrial camera to make a video recording again;
Detect operation, the outward appearance that the workpiece image that contrast is taken is stipulated detects.
2. the appearance detecting method of matrix form gadget according to claim 1 is characterized in that:
Described F-Theta lens extract image by row, extract a workpiece image in the column matrix formula gadget at every turn.
3. the appearance detecting method of matrix form gadget according to claim 2 is characterized in that:
Described matrix form gadget is installed in the straight line motion platform, by linear motion platform with the first row of matrix form gadget move to the F-Theta lens under, then rotating each workpiece that the angle of galvanometer motor extracts in the first row successively detects, after having detected first row, mobile material folding motion platform carries out the detection of following workpiece successively until finish again.
4. the appearance detecting method of arbitrary described matrix form gadget according to claim 1-3 is characterized in that:
Described detection operation is to detect the workpiece outward appearance by the image that image processing software contrasts each small workpiece whether to have defective.
5. the appearance delection device of a matrix form gadget comprises motion platform and industrial camera, it is characterized in that:
Also comprise the magnified sweep assembly that forms by the F-Theta lens, with galvanometer motor and the focus lamp of reflecting optics; The F-Theta lens be fixedly mounted on motion platform directly over; Galvanometer motor, focus lamp and industrial camera are arranged on the surface level, are arranged in order according to vertical order; Galvanometer motor is fixedly mounted on the top of F-Theta lens, its reflecting optics be located at the F-Theta central line of lens directly over and and surface level between be the inclination angle of angle variable; The center of the center of reflecting optics, the center of focus lamp and industrial camera point-blank.
6. the appearance delection device of matrix form gadget according to claim 5 is characterized in that:
Described industrial camera connects an image processing part, and the image of image processing part after with the amplification of obtaining in the industrial camera sensor compares with reference to the whether qualified criterion of regulation, and whether the gadget outward appearance of judging detection is qualified.
7. the appearance delection device of matrix form gadget according to claim 5 is characterized in that:
Described motion platform is installed on the straight line slide unit of a side direction with linear electric motors, and linear electric motors drive motion platform along straight line slide unit straight ahead.
8. the appearance delection device of matrix form gadget according to claim 7 is characterized in that:
Described straight line slide unit is fixedly mounted on one and is fixed on the board on ground; The side of slide unit top is equipped with the fixedly mounting bracket of magnified sweep assembly and industrial camera.
9. the appearance delection device of arbitrary described matrix form gadget according to claim 5-7 is characterized in that:
The pixel of described industrial camera is more than or equal to 1,000,000.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210465505.6A CN102944561B (en) | 2012-11-16 | 2012-11-16 | A kind of appearance detecting method of matrix form gadget and device |
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| CN201210465505.6A CN102944561B (en) | 2012-11-16 | 2012-11-16 | A kind of appearance detecting method of matrix form gadget and device |
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| CN102944561A true CN102944561A (en) | 2013-02-27 |
| CN102944561B CN102944561B (en) | 2015-07-29 |
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Cited By (5)
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| CN105548217A (en) * | 2016-02-23 | 2016-05-04 | 信阳舜宇光学有限公司 | Appearance inspection device and method of film coating product |
| CN105783721A (en) * | 2016-03-31 | 2016-07-20 | 浙江工商大学 | Device for detecting whether mounting holes of shelf beam are qualified by use of three channels |
| CN105891224A (en) * | 2016-03-31 | 2016-08-24 | 浙江工商大学 | Device for checking whether goods shelf cross beam mounting holes qualified or not through single light path transmission |
| CN110243823A (en) * | 2019-05-08 | 2019-09-17 | 华中科技大学 | The automatic screening apparatus of Rickets and its application method based on support vector machines |
| CN110907465A (en) * | 2019-12-29 | 2020-03-24 | 常州微亿智造科技有限公司 | Appearance detection system for large-plane workpiece |
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| CN110907465A (en) * | 2019-12-29 | 2020-03-24 | 常州微亿智造科技有限公司 | Appearance detection system for large-plane workpiece |
| CN110907465B (en) * | 2019-12-29 | 2024-04-12 | 常州微亿智造科技有限公司 | Appearance detection system for large-plane workpiece |
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Address after: 100000 Beijing City, Chaoyang District Jiuxianqiao Road No. 1 building a layer of M3 Patentee after: Beijing golden orange Polytron Technologies Inc Address before: 100000 Beijing City, Chaoyang District Jiuxianqiao Road No. 1 building a layer of M3 Patentee before: Beijing JCZ Technology Co., Ltd. |