CN201397305Y - Hard card surface quality detection device - Google Patents
Hard card surface quality detection device Download PDFInfo
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- CN201397305Y CN201397305Y CN2009201078188U CN200920107818U CN201397305Y CN 201397305 Y CN201397305 Y CN 201397305Y CN 2009201078188 U CN2009201078188 U CN 2009201078188U CN 200920107818 U CN200920107818 U CN 200920107818U CN 201397305 Y CN201397305 Y CN 201397305Y
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- surface quality
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Abstract
The utility model provides a hard card surface quality detection device, which aims to resolve the problem that a protective layer and a printed layer can not be detected respectively in the existinghard card detection. The hard card surface quality detection device comprises a first imaging device and a second imaging device, the first imaging device comprises a first camera and a first light source which are used for detecting quality of the printed layer, the centre line of light emitted by the first light source is coaxial with the optic axis of a lens of the first camera, and the optic axis of the lens of the first camera is perpendicular to the surface of a detected hard card. The second imaging device comprises a second camera and a second light source which are used for detectingthe protective layer, the centre line of light emitted by the second light source is coaxial with the optic axis image of a lens of the second camera, and an included angle formed between the centre line of the light emitted by the second light source and the surface of the detected hard card and an include angle formed between the optic axis of the lens of the second camera and the surface of thedetected hard card are both larger than 0 degree and smaller than 90 degrees. The hard card surface quality detection device can be widely applied to surface quality detection of various bank cards or identification cards.
Description
Technical field
The utility model relates to optical detection apparatus, particularly the imaging device in the checkout equipment.
Background technology
Hard cards is used for recorded information or have the characteristics of compact volume and convenience as voucher, and present various hard cards are used widely in life, and as IC-card, various bank card, phonecard etc., a lot of people are daily all can to carry a plurality of cards and use with convenient.The hard cards production quantity of therefore annual this class is very huge.
Unavoidably there are the substandard products of certain ratio in the hard cards of producing, and the defective of substandard products concentrates on the surface quality defect of hard cards mostly.The surface of hard cards generally has two-layer, and one deck is the printed layers that is printed with various patterns, and another layer is at the transparent protective seam that covers printed layers.The surface imperfection of said hard cards mainly contains the picture and text defective that exists on the printed layers, colour deficient, dirty some white-spot defects etc., and the scratch defects that exists on the protective seam, air blister defect, depression etc.Detecting to get rid of substandard products to the hard cards of producing is necessary programs.
Existing hard cards detects the normal manual detection that adopts, and promptly utilizes people's vision that the hard cards surface is detected.Obviously there is big, the inefficient problem of labour intensity in the mode of this manual detection, and this problem is more outstanding when particularly a large amount of hard cards of producing being detected.Though A designer person proposes to utilize machine vision technique to realize the method that robotization detects, promptly utilize digital imaging technology to obtain the hard cards surface image and compare and detect with template, also do not have effective means but the two-layer defective that this scheme for how exists hard cards is distinguished detection, the two-layer defective of hard cards is detected respectively can handle cardboard card defective to which kind of means of following adopted foundation is provided.
The utility model content
In order to solve the problem that can not detect the defective of protective seam and printed layers respectively that exists in the existing hard cards detection; the utility model provides a kind of hard cards surface quality checkout equipment; can be respectively to printed layers and protective seam imaging, thus two-layer defective separately distinguished.
The technical solution of the utility model is as follows:
Hard cards surface quality checkout equipment, comprise first imaging device and second imaging device, described first imaging device comprises first camera and first light source that is used to detect cardboard card print layer quality, described first light source sends the light shaft coaxle of the camera lens of the center line of light and first camera, and the optical axis of the camera lens of first camera is perpendicular to detected hard cards surface; Described second imaging device comprises second camera and the secondary light source that is used to detect cardboard card protective seam quality; it is coaxial that described secondary light source sends the optical axis mirror image of camera lens of the center line of light and second camera, and with the angle on detected hard cards surface all greater than 0 ° and less than 90 °.
Described first light source is the annular light source around the camera lens setting of first camera.
Described first light source and/or secondary light source are directional light sources.
Described secondary light source is a specific band light source, to the camera lens of second camera the optical filter that passes through described specific band light is set on detected hard cards surface, and the optical filter by described specific band light promptly is set before the camera lens of second camera; Described first light source is the light source with the different wave band of described specific band.
The imager chip of described second camera is a black-white CCD.
The imager chip of described first camera is three colored CCDs.
Described secondary light source sends the optical axis of camera lens of the center line of light and second camera and the angle on detected hard cards surface is 60 °.
Technique effect of the present utility model:
Hard cards surface quality checkout equipment of the present utility model comprises two imaging devices, each imaging device includes corresponding light source and the camera that is provided with, promptly by the angle of light source and camera is set, make each camera mainly receive light, reach the purpose of imaging through the corresponding light source of tested hard cards surface reflection.Utilize the hard cards sealer reflective characteristic different with printed layers, two imaging devices of the present utility model can be respectively to the surface imaging of protective seam and printed layers, and the light of protective seam and printed layers reflection can not interfere with each other.The surface imaging of protective seam and printed layers can compare the defective that detects protective seam and/or printed layers existence with the template that sets in advance.
Description of drawings
Fig. 1 is a structural drawing of the present utility model.
Fig. 2 is the schematic diagram of hard cards surface light reflection.
Fig. 3 is the intensity distribution that diffuse of the light of first light source on the hard cards surface.
Fig. 4 is a schematic diagram of the present utility model.
Sign is described as follows among the figure:
1, first light source; 2, first camera lens; 3, secondary light source; 4, second camera lens; 5, detect casing; 6, travelling belt; 7, detected hard cards; 8, protective seam; 9, printed layers; 10, incident light.
Embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is elaborated.
Hard cards described in the utility model be meant see in the daily life be used for recorded information or as the little and hard tablet of voucher such as magnetic card, credit card, I.D. etc.; people are daily to carry and uses in order to be adapted to; these cards all are as parent plate by hard material under a lot of situations; as the PVC plate; print various patterns (printed layers) on the surface of parent plate, and in order to reduce the wearing and tearing of the printed layers transparent protective seam in printed layers surface bonding.In preparation hard cards process, some defectives can be produced unavoidably on printed layers and protective seam, as defectives such as the picture and text defective on the printed layers, colour deficient, dirty point and white point, defectives such as cut on the protective seam and bubble for another example.Hard cards with above-mentioned defective is regarded as substandard products, can not abandon simply the processing of substandard products, and this can increase manufacturing cost, needs these substandard products of recycling as far as possible.How to handle these substandard products and enable to become certified products, need handle at the specific defective of substandard products, for example the defective of substandard products only because on the protective seam air blister defect is arranged, only need be pasted protective seam again when handling so once more and get final product.A major function of the present utility model is distinguished exactly and is detected the hard cards surface quality defect, for next step Retreatment method to substandard products provides foundation.
Fig. 1 has shown primary structure of the present utility model.First imaging device and second imaging device are set at and detect in the casing 5, to reduce the interference of external light source to first imaging device and second imaging device.The below of detecting casing 5 is a hard cards travelling belt 6, and a surface of the hard cards 7 that is transmitted is towards detecting casing.First camera and first light source 1 have constituted first imaging device, detected hard cards 7 surface reflections of the light that first light source 1 sends on travelling belt 6 are to the camera lens 2 of first camera, first light source 1 sends the center line of light and the light shaft coaxle of first camera lens 2, and the optical axis of the camera lens 2 of first camera is perpendicular to detected hard cards 7 surfaces.Second imaging device comprises second camera and secondary light source 3, it is coaxial that secondary light source 3 sends the optical axis mirror image of camera lens 4 of the center line of light and second camera, the light that secondary light source 3 sends can direct reflections through detected hard cards 7 surfaces in the camera lens 4 of second camera, and secondary light source 3 sends the angle on the optical axis of camera lens 4 of the center line of light and second camera and detected hard cards 7 surfaces all greater than 0 ° and less than 90 °.
Fig. 2 has disclosed the relation of hard cards surface to reflection of light, also is the protective seam 8 on hard cards surface and the reflective characteristic separately of printed layers 9.Protective seam 8 is smooth, the smooth and clear films of one deck; cover printed layers 9 surfaces; shine the most of protective seam 8 that directly sees through of incident light 10 (bold arrow line among the figure) on hard cards surface, the fraction incident light can form direct reflection on protective seam 8 surfaces.Printed layers 9 is one deck ink laies that cover on the PVC plate, and the incident light that passes protective seam 8 arrives printed layers 9 backs and forms diffuse reflection.
Fig. 3 has shown the intensity distributions that diffuses that incident light forms in printed layers, and when incident light was surperficial perpendicular to hard cards, the intensity distributions that diffuses met cosine distribution rule, i.e. I=I
oCos θ, wherein I is the catoptrical intensity of a direction, I
oBe the intensity of incident light center line part, θ is the between perpendiculars angle of a described direction and hard cards surface.As seen, when θ=0, I=I
o, i.e. the catoptrical intensity maximum of this direction.Therefore the position relation that first light source in first imaging device of the present utility model shown in Figure 1 sends between the optical axis of the center line of light and first camera lens need meet the above-mentioned intensity distributions rule that diffuses, and makes the camera lens of winning be in the strongest direction that diffuses.Promptly the first camera lens optical axis is perpendicular to detected hard cards surface.The printed layers on detected hard cards surface forms the incident light from first light source and diffuses, diffuse reflection light intensity maximum on θ=0 direction, the intensity maximum that diffuses of i.e. first camera lens position reception, be beneficial to first camera and form the image of printed layers clearly, this image is the image of printed layers certainly.Because the amount of the light protected seam of first light source reflection is very little, so a little light of protective seam reflection enters behind the camera lens of first camera very little for the imaging influence of printed layers.
On the other hand, the corresponding setting of second camera in second imaging device with secondary light source, promptly the light that sends of secondary light source is through the camera lens of detected hard cards protective seam direct reflection to second camera, and second camera receives imaging behind the light of reflection.It is coaxial that the optical axis that concrete is sends the camera lens of the center line of light and second camera with secondary light source is arranged to mirror image.The light that can see secondary light source according to top analysis forms direct reflection on the protective seam surface; according to direct reflection relation the camera lens of second camera is arranged at utmost receive reflected light from protective seam, can be so that second camera forms the image of protective seam clearly.Can see that therefore the camera lens of first camera that the specular light that the light of secondary light source forms at protective seam can not enter can not produce the imaging of first camera and disturb.According to the aforesaid intensity distributions relation that diffuses; have only small part to enter into the camera lens of second camera diffuse (no matter being diffusing of first light source or secondary light source generation) that printed layers forms, it is little therefore second camera to be formed the protective seam image disruption.Certainly, diffuse to the influence of second camera in order further to reduce, it is to adjust the receive threshold of second camera that a preferred scheme is arranged, and makes lower the diffusing not by second camera imaging of intensity.
Fig. 4 is a schematic diagram of the present utility model, corresponding to aforementioned description to first imaging device and second imaging device.Wherein the angle on the optical axis of the camera lens 4 of the optical axis of secondary light source 3 and second camera and detected hard cards surface is 60 °, and this is the reasonable setting of imaging effect in actual applications.First light source 1 and secondary light source 3 in the present embodiment all adopt directional light sources, can raise the efficiency.
Center line with light source in the utility model is the optical efficiency height with the benefit that the optical axis of corresponding camera lens carries out coaxial setting.The annular light source that first light source is arranged to around the camera lens of first camera is an above-mentioned implementation that makes first light source and the first camera lens light shaft coaxle.
Further illustrate some preferred schemes of the utility model below.
Can also adopt the frame mode of branch spectrum further to reduce the annoyance level of first light source to second camera imaging.Concrete structure is as follows: secondary light source is arranged to the red LED light source, first light source is non-red light source (adopting white light source in the present embodiment), simultaneously before the camera lens of second camera Red lightscreening plate is set on detected hard cards surface, the light that promptly enters second camera lens has only red light.Even this structural benefit is the camera lens that light that first light source is arranged (or through first light source of reflection light) arrives second camera, also can be by the optical filter filtering, thus reduced the annoyance level of first light source to second camera imaging.
The imager chip of second camera is set to black-white CCD and can reduces cost, because the protective seam imaging does not have the color requirement, therefore adopting cheaply, black-white CCD also can reach testing goal.
Because a lot of parts can adopt the site on the general printed layers, if adopt the imaging of single CCD color camera colored Moire fringe might occur, reduce the accuracy that detects, the imager chip that therefore adopts first camera is that the scheme of three colored CCDs can address this problem.
After adopting Sheet turning device; first imaging device of the present utility model and second imaging device can detect the tow sides of hard cards respectively, thereby the image of the protective seam of acquisition and printed layers can compare with predefined standard form the quality of hard cards sealer and printed layers are judged.
Claims (7)
1, hard cards surface quality checkout equipment, comprise first imaging device and second imaging device, it is characterized in that described first imaging device comprises first camera and first light source, described first light source sends the light shaft coaxle of the camera lens of the center line of light and first camera, and the optical axis of the camera lens of first camera is perpendicular to detected hard cards surface; Described second imaging device comprises second camera and secondary light source, and it is coaxial that described secondary light source sends the optical axis mirror image of camera lens of the center line of light and second camera, and with the angle on detected hard cards surface all greater than 0 ° and less than 90 °.
2,, it is characterized in that the annular light source that described first light source is provided with for the camera lens around first camera according to the described hard cards surface quality of claim 1 checkout equipment.
3, according to claim 1 or 2 described hard cards surface quality checkout equipments, it is characterized in that described first light source and/or secondary light source are directional light sources.
4, according to claim 1 or 2 described hard cards surface quality checkout equipments, it is characterized in that described secondary light source is a specific band light source, to the camera lens of second camera, the optical filter that passes through described specific band light is set on detected hard cards surface; Described first light source is the light source with the different wave band of described specific band.
5, according to claim 1 or 2 described hard cards surface quality checkout equipments, the imager chip that it is characterized in that described second camera is a black-white CCD.
6, according to claim 1 or 2 described hard cards surface quality checkout equipments, the imager chip that it is characterized in that described first camera is three colored CCDs.
7,, it is characterized in that described secondary light source sends the optical axis of camera lens of the center line of light and second camera and the angle on detected hard cards surface is 60 ° according to claim 1 or 2 described hard cards surface quality checkout equipments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201078188U CN201397305Y (en) | 2009-05-05 | 2009-05-05 | Hard card surface quality detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201078188U CN201397305Y (en) | 2009-05-05 | 2009-05-05 | Hard card surface quality detection device |
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| CN201397305Y true CN201397305Y (en) | 2010-02-03 |
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| CN2009201078188U Expired - Lifetime CN201397305Y (en) | 2009-05-05 | 2009-05-05 | Hard card surface quality detection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519981A (en) * | 2011-12-16 | 2012-06-27 | 湖南工业大学 | Online detection system for PVC (polyvinyl chloride) building material surface quality |
| CN104441964A (en) * | 2014-12-08 | 2015-03-25 | 蒋崇贞 | Sheet-fed inspection machine for multi-channel printing waste classification |
| CN105509657A (en) * | 2015-11-26 | 2016-04-20 | 国家电网公司 | High-precision measurement method of scratch area and grayscale parameter of IC card chip |
| CN107703058A (en) * | 2017-09-14 | 2018-02-16 | 深圳市智信精密仪器有限公司 | Appearance detection means and the light-source system that the progress outward appearance detection of grating line is provided |
| CN110261408A (en) * | 2019-07-30 | 2019-09-20 | 云谷（固安）科技有限公司 | Display module defect detecting device and method |
-
2009
- 2009-05-05 CN CN2009201078188U patent/CN201397305Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519981A (en) * | 2011-12-16 | 2012-06-27 | 湖南工业大学 | Online detection system for PVC (polyvinyl chloride) building material surface quality |
| CN104441964A (en) * | 2014-12-08 | 2015-03-25 | 蒋崇贞 | Sheet-fed inspection machine for multi-channel printing waste classification |
| CN105509657A (en) * | 2015-11-26 | 2016-04-20 | 国家电网公司 | High-precision measurement method of scratch area and grayscale parameter of IC card chip |
| CN105509657B (en) * | 2015-11-26 | 2018-05-18 | 国家电网公司 | A kind of high-precision measuring method of IC card chip scratch area and gray scale parameter |
| CN107703058A (en) * | 2017-09-14 | 2018-02-16 | 深圳市智信精密仪器有限公司 | Appearance detection means and the light-source system that the progress outward appearance detection of grating line is provided |
| CN107703058B (en) * | 2017-09-14 | 2019-11-15 | 深圳市智信精密仪器有限公司 | Appearance detection device and offer grating line carry out the light-source system of appearance detection |
| CN110261408A (en) * | 2019-07-30 | 2019-09-20 | 云谷（固安）科技有限公司 | Display module defect detecting device and method |
| CN110261408B (en) * | 2019-07-30 | 2021-11-23 | 云谷（固安）科技有限公司 | Display module defect detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 100094 Beijing, Haidian District Cui Yuan Road No. 13, building 7, room 7, floor 701 Patentee after: LUSTER LIGHTTECH GROUP Co.,Ltd. Address before: 100195 Beijing city Haidian District xingshikou road Yiyuan cultural creative industry base in C District No. 2 Patentee before: BEIJING LUSTER LIGHTTECH Co.,Ltd. Address after: 100195 Beijing city Haidian District xingshikou road Yiyuan cultural creative industry base in C District No. 2 Patentee after: BEIJING LUSTER LIGHTTECH Co.,Ltd. Address before: 100097 Beijing city Haidian District landianchang Road No. 25 South Newton district office block 6 layer Patentee before: Beijing Luster Lightvision Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100203 |