CN103236106A - Workpiece hidden pattern detecting device - Google Patents
Workpiece hidden pattern detecting device Download PDFInfo
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- CN103236106A CN103236106A CN2013101097724A CN201310109772A CN103236106A CN 103236106 A CN103236106 A CN 103236106A CN 2013101097724 A CN2013101097724 A CN 2013101097724A CN 201310109772 A CN201310109772 A CN 201310109772A CN 103236106 A CN103236106 A CN 103236106A
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Abstract
A workpiece hidden pattern detecting device comprises a lighting device, a detecting camera, a workpiece position sensor and a controller. The lighting device, the detecting camera and the workpiece position sensor are connected with the controller. The lighting device comprises a first-area light source and a second-area light source. Workpieces sequentially pass irradiation ranges of the first-area light source and the second-area light source. The workpiece position sensor corresponds to the first-area light source. The second-area light source is divided into different parts according to annular angles, and light sources circuits of different parts are serially connected. The detecting camera is used for acquiring images of the workpieces passing the first-area light source and the second-area light source. The workpiece hidden pattern detecting device has the advantages that image is acquired by double exposure with one camera to complete workpiece hidden pattern detection, full-automatic detection is achieved, complex detecting procedures are avoided, detecting efficiency is high, and the detecting device is simple and compact in structure.
Description
Technical field
The invention belongs to the vision detection technology field, be used for comprising the detection of hidden pattern on the workpiece such as various coins, circulation coin, commemorative coin, be a kind of workpiece hidden pattern pick-up unit.
Background technology
Hidden pattern is a kind of anti-counterfeiting technology, be usually used in various coins, the circulation coin, the discriminating of type of workpiece such as commemorative coin, current, the image vision detection technique is widely used, existing checkout equipment can by polyphaser repeatedly imaging the hidden pattern of workpiece is detected, yet, such detection mode complex steps, detection efficiency is low, needs to judge earlier the development direction of hidden pattern during owing to detection, and correspondence is chosen illumination orientations (angle) and detected hidden pattern again, this just need be divided into more than two examines station, the assay device structures complexity, the image processing software establishment is numerous and diverse, and equipment volume is big.Further, type of workpiece hidden patterns such as various coins, circulation coin, commemorative coin have the two sides usually, and the detection mode of prior art need detect respectively the workpiece two sides, and also will there be the program of the face of changing to detect the centre, very complicated, error also appears in such testing process easily.
Summary of the invention
The problem to be solved in the present invention is: existing detection technique complex steps to hidden pattern on the workpiece, and equipment volume is big, and detection efficiency is low.
Technical scheme of the present invention is: workpiece hidden pattern pick-up unit, comprise lighting device, detection camera, location of workpiece sensor and controller, and lighting device, detection camera and location of workpiece sensor are connected controller respectively,
Described lighting device is divided into district light source He Er district light source, workpiece passes through the range of exposures of district light source He Er district light source successively, the corresponding district light source setting of location of workpiece sensor, for detection of workpiece whether through district's light source range of exposures, two district's light sources are divided into different piece by annular angle, the circuit series connection of the light source of different piece;
The position of detection camera is set, contains the image of hidden pattern one side when being used for gathering workpiece by district light source He Er district light source.
The one district light source He Er district light source of described lighting device is polylith led circuit plate, be provided with half-transmitting mirror between led circuit plate and the workpiece motion s path, described half-transmitting mirror becomes the inclination angle with led circuit plate light source exit direction, and detection camera is arranged on workpiece on the reflected light path of half-transmitting mirror.
Workpiece operating path symmetria bilateralis is provided with described lighting device, be respectively equipped with half-transmitting mirror between both sides light source and the workpiece motion s path, described half-transmitting mirror becomes 90 degree angles, along injecting between the angle of half-transmitting mirror perpendicular to the direction of described 90 degree angle center lines, detection camera is arranged on workpiece on the reflected light path of half-transmitting mirror to the light of both sides light source respectively.
The present invention only needs a camera to gather image, location of workpiece sensor detects workpiece and enters district's light source, controller control detection camera collection image at this moment, needed light source setting when determining to detect the hidden pattern detection according to the direction of workpiece, controller is simultaneously according to the speed of workpiece and the distance of location of workpiece sensor and two district's light source centers, calculate time-delay, two district's light sources detect needed light source according to hidden pattern the light-source brightness of adjusting each angle are set, controller control detection camera is gathered the workpiece image under two district's light sources in correspondence time-delay back, finish the detection of hidden pattern according to the image of secondary acquisition.
Compared to existing technology, the present invention has following beneficial effect:
1) need not the repeatedly imaging of a plurality of cameras, Jiang Yi district light source He Er district light source is arranged in the coverage of detection camera, can finish imaging by the one camera double exposure and detect, and whole checkout equipment is concision and compact more;
2) can realize continuous detecting, a workpiece is when the two district's light source scopes that enter are carried out the hidden pattern detection, and next workpiece just can enter district's light source scope travel direction and judge.For prior art, it is necessary that the development direction of judging hidden pattern controls that light source detects again, and the detection time of adjacent two workpiece of the present invention is overlapping, has greatly improved detection speed;
3) light source that provides of led circuit plate stable and uniform more, the design of half-transmitting mirror provides positive direct projection light source to workpiece on the one hand, and the position that has solved detection camera simultaneously arranges problem;
4) polishing simultaneously in both sides, workpiece motion s path, distribution of light is more even; Further for the two-sided workpiece of types such as coin, circulation coin, commemorative coin, by both sides polishing simultaneously, gather image simultaneously, can disposablely finish two-sided hidden pattern to detect;
4) the present invention is used for the detection of hidden pattern, and the pattern of gathering under the one district light source also can be used for the detection of surface of the work pattern simultaneously, the integrated level height of whole detection device, and measuring ability is many.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the structural representation of the embodiment of the invention 1 lighting device.
Fig. 3 is the structural representation of the embodiment of the invention 2.
Fig. 4 is the structural representation of the embodiment of the invention 2 lighting devices.
Fig. 5 is the structural representation of the embodiment of the invention 3.
Fig. 6 is the detection principle schematic of the embodiment of the invention 3.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
The present invention includes lighting device 1, location of workpiece sensor 2, detection camera 3 and controller 4, lighting device 1, location of workpiece sensor 2 and detection camera 3 are connected controller 4 respectively, as shown in Figure 1, lighting device 1 is divided into district's light source 11 He Er district light sources 12, workpiece 5 passes through the range of exposures of district's light source 11 He Er district light sources 12 successively, 11 settings of the corresponding district light sources of location of workpiece sensor 2, for detection of workpiece 5 whether through district's light source 11 ranges of exposures; As shown in Figure 2, two district's light sources 12 are divided into different piece by annular angle, and the circuit series connection of the light source of different piece namely can be controlled separately; The position of detection camera 3 is set, contain hidden pattern image simultaneously when be used for gathering workpiece 5 by a district light source 11 He Er district light sources 12, in the present embodiment, one district's light source, 11 He Er district light sources 12 all leave the space, two district's light sources 12 are annular, detection camera 3 is arranged on lighting device 1 top, gathers workpiece image.
During work, location of workpiece sensor 2 detects workpiece 5 and enters district's light source 11, controller 4 control detection camera 3 are gathered the workpiece image of this moment, needed light source setting when determining to detect the hidden pattern detection according to workpiece image, two district's light sources arrange the light-source brightness of adjusting each angle according to described light source, reach the required bias light effect of developing, controller 4 is simultaneously according to the movement velocity of workpiece 5 and the distance at location of workpiece sensor 2 and two district's light sources, 12 centers, calculate time-delay, controller 4 control detection camera 3 are gathered the workpiece image under two district's light sources 12 in correspondence time-delay back, what gathered this moment just in time is the image of workpiece 5 under specific light source arranges, hidden pattern develops, and finishes the detection of hidden pattern according to the image of secondary acquisition.
Further, the one district light source He Er district light source of lighting device adopts polylith led circuit plate, as shown in Figure 4, S1 and S2 are the position of the corresponding district of workpiece light source He Er district light source, the led circuit plate can provide the stabilized uniform light source, in order to solve the problem that the led circuit plate may stop the visual field of detection camera 3, the present invention is provided with half-transmitting mirror 6 between led circuit plate and workpiece motion s path, as shown in Figure 3, described half-transmitting mirror 6 becomes the inclination angle with led circuit plate light source exit direction, characteristic according to half-transmitting mirror, continue to shine workpiece behind a part of light transmission half-transmitting mirror 6 of light source, workpiece forms reflection after receiving light, and the light of reflection reflects through half-transmitting mirror 6 again again, detection camera 3 is arranged on workpiece on the reflected light path of half-transmitting mirror, can collect the image of workpiece 5.Under this design, light source both can front illuminated to workpiece, do not have the occlusion issue to detection camera again, whole detection device can realize the compact structure design.
On the basis of above-mentioned design, further, in workpiece operating path symmetria bilateralis lighting device is set, as shown in Figure 5, be respectively equipped with half-transmitting mirror 6,6 ' between two-side lighting device 1 and workpiece 5 motion paths, half-transmitting mirror 6,6 ' becomes 90 degree angles, the light of both sides light source is respectively along injecting between the angle of half-transmitting mirror perpendicular to the direction of described 90 degree angle center lines, workpiece 5 passes through between angle, detection camera 3 is arranged on workpiece on the reflected light path of half-transmitting mirror, and shell 7 is used for priming illumination device 1 and half-transmitting mirror 6,6 '.Under this design, workpiece 5 flies in the middle of half-transmitting mirror 6,6 ', detection camera 3 is obtained the image on workpiece 5 two sides simultaneously, as shown in Figure 6, detection camera 3 is obtained the workpiece two sides image 8 under district's light source earlier, the workpiece two sides image 8 ' under two district's light sources, the disposable testing of finishing the workpiece two sides are obtained in the time-delay of calculating according to controller 4 again.
In sum, the present invention automatically detects, and need not complicated detection step, the detection efficiency height, and pick-up unit is simple and compact for structure.
Claims (3)
1. workpiece hidden pattern pick-up unit is characterized in that comprising lighting device, detection camera, location of workpiece sensor and controller, and lighting device, detection camera and location of workpiece sensor are connected controller respectively,
Described lighting device is divided into district light source He Er district light source, workpiece passes through the range of exposures of district light source He Er district light source successively, the corresponding district light source setting of location of workpiece sensor, for detection of workpiece whether through district's light source range of exposures, two district's light sources are divided into different piece by annular angle, the circuit series connection of the light source of different piece;
The position of detection camera is set, contains the image of hidden pattern one side when being used for gathering workpiece by district light source He Er district light source.
2. workpiece hidden pattern pick-up unit according to claim 1, the district light source He Er district light source that it is characterized in that described lighting device is polylith led circuit plate, be provided with half-transmitting mirror between led circuit plate and the workpiece motion s path, described half-transmitting mirror becomes the inclination angle with led circuit plate light source exit direction, and detection camera is arranged on workpiece on the reflected light path of half-transmitting mirror.
3. workpiece hidden pattern pick-up unit according to claim 1 and 2, it is characterized in that workpiece operating path symmetria bilateralis is provided with described lighting device, be respectively equipped with half-transmitting mirror between both sides light source and the workpiece motion s path, described half-transmitting mirror becomes 90 degree angles, along injecting between the angle of half-transmitting mirror perpendicular to the direction of described 90 degree angle center lines, detection camera is arranged on workpiece on the reflected light path of half-transmitting mirror to the light of both sides light source respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109772.4A CN103236106B (en) | 2013-03-29 | 2013-03-29 | Workpiece hidden pattern detecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109772.4A CN103236106B (en) | 2013-03-29 | 2013-03-29 | Workpiece hidden pattern detecting device |
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| CN103236106A true CN103236106A (en) | 2013-08-07 |
| CN103236106B CN103236106B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310109772.4A Active CN103236106B (en) | 2013-03-29 | 2013-03-29 | Workpiece hidden pattern detecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104123779A (en) * | 2013-08-31 | 2014-10-29 | 中钞长城金融设备控股有限公司 | Coin concealed pattern detecting method and detecting device thereof |
| CN107084993A (en) * | 2017-06-21 | 2017-08-22 | 无锡九霄科技有限公司 | Double camera single-station positive and negative vision inspection apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220614A (en) * | 1991-02-22 | 1993-06-15 | Professional Coin Grading Service, Inc. | Automated coin grading system |
| CN102332187A (en) * | 2011-09-30 | 2012-01-25 | 中钞长城金融设备控股有限公司 | Coin detection equipment |
| CN202422258U (en) * | 2012-01-09 | 2012-09-05 | 王�华 | Double-face online detection device for coins |
| CN203405865U (en) * | 2013-03-29 | 2014-01-22 | 江苏科思机电工程有限公司 | Device for detecting invisible pattern of workpiece |
-
2013
- 2013-03-29 CN CN201310109772.4A patent/CN103236106B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220614A (en) * | 1991-02-22 | 1993-06-15 | Professional Coin Grading Service, Inc. | Automated coin grading system |
| CN102332187A (en) * | 2011-09-30 | 2012-01-25 | 中钞长城金融设备控股有限公司 | Coin detection equipment |
| CN202422258U (en) * | 2012-01-09 | 2012-09-05 | 王�华 | Double-face online detection device for coins |
| CN203405865U (en) * | 2013-03-29 | 2014-01-22 | 江苏科思机电工程有限公司 | Device for detecting invisible pattern of workpiece |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104123779A (en) * | 2013-08-31 | 2014-10-29 | 中钞长城金融设备控股有限公司 | Coin concealed pattern detecting method and detecting device thereof |
| CN104123779B (en) * | 2013-08-31 | 2019-08-23 | 中钞长城金融设备控股有限公司 | Coin hidden pattern detection method and its detection device |
| CN107084993A (en) * | 2017-06-21 | 2017-08-22 | 无锡九霄科技有限公司 | Double camera single-station positive and negative vision inspection apparatus |
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| Publication number | Publication date |
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| CN103236106B (en) | 2015-06-03 |
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