CN201348611Y - Quality detecting system for laser printed matter - Google Patents
Quality detecting system for laser printed matter Download PDFInfo
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- CN201348611Y CN201348611Y CNU2009201050445U CN200920105044U CN201348611Y CN 201348611 Y CN201348611 Y CN 201348611Y CN U2009201050445 U CNU2009201050445 U CN U2009201050445U CN 200920105044 U CN200920105044 U CN 200920105044U CN 201348611 Y CN201348611 Y CN 201348611Y
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Abstract
The utility model discloses a quality detecting system for a laser printed matter. The quality detecting system comprises a bearing device and a camera for collecting the image of the laser printed matter; the laser printed matter is placed on the bearing device; the camera is fixedly mounted in the peripheral region of the laser printed matter; the quality detecting system further comprises a uniform diffusion light source; and the uniform diffusion light source is fixedly mounted between he laser printed matter and the camera. The quality detecting system improves the accuracy and the reliability of the quality detecting system for the laser printed matter.
Description
Technical field
The utility model relates to radium-shine print quality detection range, relates in particular to a kind of radium-shine press quality amount detection systems.
Background technology
In recent years, partly high-grade printing packaging product adopt radium-shine paper, film as printable fabric.Radium-shine paper, film adopt special film coating technique, and under the condition that the illumination reflection is arranged, laser effects such as rainbow, light beam appear in paper, observe from different perspectives to present different rainbow, light beam pattern, present the special-effect of " far and near height is variant ".Adopt radium-shine paper, film to be called radium-shine printed matter as the printed matter of printable fabric.Clear beautiful, the riot of color of radium-shine printed matter visual effect is welcome by printing packaging circle deeply.
Fig. 1 is an existing typical radium-shine press quality amount detection systems.Radium-shine press quality amount detection systems shown in Figure 1 mainly comprises: travelling belt 101, line scan camera 102, strip source 103 (computing machine does not identify in Fig. 1).Wherein strip source 103 is used to provide illumination, and line scan camera 102 is used to take the printed matter image, and computing machine is used to handle the printed matter image that line scan camera is taken, and detects print quality.Its principle of work is as follows: radium-shine printed matter (being designated 104 among Fig. 1) is followed travelling belt 101 continuous level reaches, motion along with printed matter, (line 1 as shown in Figure 2, line 2 are until line N for the continuous line-by-line of line scan camera, line 1 has been formed the entire image of this radium-shine printed matter to line N) scan, finish until the image scanning of whole printed matter.
Because the singularity of radium-shine printed matter; using strip source to shine; in the printed matter image that line scan camera is taken usually color fringe can appear; light beam etc.; there be collection and the detection that can disturb radium-shine printed matter true picture in these color fringes and light beam, have influenced accuracy and reliability that whole radium-shine press quality amount detection systems detects.
The utility model content
The utility model embodiment provides a kind of radium-shine press quality amount detection systems, in order to improve in the radium-shine printed matter testing process accuracy and the reliability of the radium-shine printed matter image that camera is taken.
The utility model provides a kind of radium-shine press quality amount detection systems, comprise: the camera of bogey and the radium-shine printed matter image of collection, radium-shine printed matter is positioned on the described bogey, described camera is fixedly mounted in the peripheral region of described radium-shine printed matter, also comprises: even diffused light source; Described even diffused light source is fixedly mounted between described radium-shine printed matter and the described camera.
Described even diffused light source is the dome light source.
Described camera adopts line scan camera, and opening is arranged at the top of described dome light source, makes described line scan camera can see through described opening described radium-shine printed matter is carried out line sweep.
Described bogey adopts travelling belt or rewinding machine; Described radium-shine printed matter is placed horizontally on the horizontal bearing face of travelling belt or rewinding machine, and follows its continuous motion; The bottom surface of described dome light source is parallel to the horizontal surface of radium-shine printed matter.
Described bogey adopts circular drum, and the curved outside surface that fits in described circular drum of described radium-shine printed matter surface is placed, and follows its continuous motion; The bottom surface of described dome light source is parallel to the section of described radium-shine printed matter curved surfaces.
The size of the described radium-shine printed matter horizontal surface of described dome light source bottom surface distance is 1～15mm.
The section size of the described radium-shine printed matter curved surfaces of described dome light source bottom surface distance is 1～15mm.
Described dome light source adopts described bowl-shape dome light source, angle between the primary optical axis of described line scan camera camera lens and the horizontal surface of described radium-shine printed matter is fixed, described angle make described line scan camera at the sweep trace on the described radium-shine printed matter outside the illumination dark space that the open top of described dome light source causes.
Described dome light source adopts described bowl-shape dome light source, angle between the section of the primary optical axis of described line scan camera camera lens and the curved surfaces of described radium-shine printed matter is fixed, described angle make described line scan camera at the sweep trace on the described radium-shine printed matter outside the illumination dark space that the open top of described dome light source causes.
The span of described angle is 40 °～80 °.
Described dome light source adopts column dome light source, and the angle between the primary optical axis of described line scan camera camera lens and the horizontal surface of described radium-shine printed matter is fixed, and described angle is right angle or oblique angle.
The size in described radium-shine printed matter horizontal surface of described column dome light source distance or section is 1～15mm.
Described camera adopts area array cameras, and described radium-shine printed matter horizontal stationary is positioned on the described bogey, and opening is arranged at described dome light source top, and described area array cameras can be taken described radium-shine printed matter by described opening.
The primary optical axis of described area array cameras camera lens and the Surface Vertical of described radium-shine printed matter, and the top open part of described dome light source is equipped with coaxial light source.
The beneficial effect of the utility model embodiment comprises:
The radium-shine press quality amount detection systems that the utility model embodiment provides, because at radium-shine printed matter with gather the even diffused light source that stationkeeping is installed between the camera of radium-shine printed matter image, use even diffused light source light source that radium-shine printed matter is shone, made full use of even diffused light source incident light in the plane property at random basically identical, the even brightness characteristics, the color fringe and the light beam of its quality testing appears disturbing in the radium-shine printed matter image of having avoided being gathered, and improved the reliability of radium-shine press quality amount detection systems.
Further, the radium-shine press quality amount detection systems that the utility model embodiment provides, at even diffused light source is under the situation of bowl-shape dome light source, be certain included angle (this angle in the radium-shine printed matter testing process is fixed) between the section of the primary optical axis of line scan camera camera lens and the horizontal surface of radium-shine printed matter or curved surfaces, make line scan camera at the sweep trace on the radium-shine printed matter outside the illumination dark space that the open top of dome light source causes, further guaranteed the accuracy and the reliability of line scan camera photographic images.
The radium-shine press quality amount detection systems that the utility model embodiment provides, can also be under the situation that adopts area array cameras radium-shine printed matter to be taken by the open top of dome light source (area array cameras with this radium-shine printed matter surface is vertical take), the illumination dark space of causing for fear of the open top of dome light source impacts captured image, top at the dome light source increases a coaxial light source, the illumination dark space that forms for the open top of dome light source provides illumination, make the integral image brightness unanimity of the radium-shine printed matter that area array cameras is taken, further guaranteed the result's of area array cameras photographic images accuracy and reliability.
Description of drawings
Fig. 1 is existing radium-shine press quality amount detection systems structure and principle of work synoptic diagram;
Fig. 2 is the sweep trace synoptic diagram of scanning camera in radium-shine printed matter photographs;
The bowl-shape dome light source perspective view that Fig. 3 provides for the utility model embodiment;
The column dome light source perspective view that Fig. 4 provides for the utility model embodiment;
The sectional view of the bowl-shape or column dome light source that Fig. 5 provides for the utility model embodiment;
One of radium-shine press quality amount detection systems structural representation that Fig. 6 provides for the utility model embodiment one;
Two of the radium-shine press quality amount detection systems structural representation that Fig. 7 provides for the utility model embodiment one;
The radium-shine press quality amount detection systems structural representation that Fig. 8 provides for the utility model embodiment two;
The radium-shine press quality amount detection systems structural representation that Fig. 9 provides for the utility model embodiment three.
Embodiment
The radium-shine press quality amount detection systems that the utility model embodiment provides, existing radium-shine press quality amount detection systems is improved, the strip source that uses even diffused light source to substitute in the existing radium-shine press quality amount detection systems shines radium-shine printed matter, and evenly diffused light source is fixedly installed between radium-shine printed matter and the camera.
Even diffused light source among the utility model embodiment can comprise the even diffused light source of dome light source or other types.Preferably, the utility model embodiment is when concrete the application, and its even diffused light source can adopt bowl-shape dome light source or column dome light source (also claiming linear dome light source).Be that example describes all below with bowl-shape dome light source or column dome light source.
Fig. 3 is the perspective view of the bowl-shape dome light source that provides of the utility model embodiment, and Fig. 4 is the perspective view of the strip dome light source that provides of the utility model embodiment.
Column dome light source cross sectional shape is identical with the cross sectional shape of bowl-shape dome light source, as shown in Figure 5, as can be seen from Figure 5, column or bowl-shape dome light source are made up of following two parts: dome-shaped reflecting plate 501 and the light emitting diode 502 that is positioned at dome-shaped reflecting plate bottom.The difference of bowl-shape dome light source and column dome light source is that the reflecting plate of bowl-shape dome light source is bowl-shape rotary body, and the reflecting plate of column dome light source is the parallel cut body of column.
Among Fig. 5, the dome-shaped reflecting plate base plane of bowl-shape dome light source or column dome light source is the bottom surface of dome light source, and correspondingly, dome-shaped reflecting plate top is the top of dome light source.Opening is arranged at the top of dome light source, and wherein, the opening of bowl-shape dome light source is positioned at top center, and its shape can be circular or other shapes; The open top of column dome light source can be linear slit.The open top of dome light source makes camera can see through this opening radium-shine printed matter is carried out line sweep.
When adopting bowl-shape dome light source or column dome light source to throw light on, as shown in Figure 5, the light that sends owing to the light emitting diode that is positioned at dome-shaped reflecting plate bottom is repeatedly reflected by the dome-shaped reflecting plate, and the direction that light is penetrated becomes at random.For by any point in bowl-shape dome light source or the column dome light source irradiation plane, incident ray comes from the space all directions, makes incident light basically identical on property at random of point-to-point transmission on the plane.The utility model embodiment is exactly a These characteristics of having utilized bowl-shape dome light source or column dome light source, adopt bowl-shape dome light source or column dome light source that radium-shine printed matter is shone, the radium-shine printed matter image that camera is photographed avoids occurring the striped or the light beam of Interference Detection.
The concrete structure and the principle of work of the radium-shine printed matter that the utility model embodiment is provided below in conjunction with concrete example describe.
Embodiment one:
The radium-shine press quality amount detection systems that the utility model embodiment one provides, as shown in Figure 6, radium-shine printed matter 601 is placed horizontally on the horizontal plane that bogey is a travelling belt 602, and follow its continuous motion, line scan camera 603 is fixedly mounted in the radium-shine printed matter peripheral region, for example can use support, slide rail or other structures to fix.
The dome light source 604 (can be bowl-shape dome light source or column dome light source) of stationkeeping is installed between radium-shine printed matter and line scan camera, the bottom surface of dome light source 604 is parallel to the horizontal surface of radium-shine printed matter 601, preferably, among the utility model embodiment one, the horizontal surface size of the radium-shine printed matter 601 of bottom surface distance of dome light source 604 is 1～15mm, so that the illumination that brightness is more even, direction is more at random to be provided.
The opening that line scan camera 603 sees through dome light source 604 tops carries out the line sweep shooting to the radium-shine printed matter 601 that lies in a horizontal plane on the travelling belt 602.As shown in Figure 6, the shooting angle of line scan camera 603 is fixed, and in other words, the angle between the primary optical axis of line scan camera 603 taking lenss and the horizontal plane of radium-shine printed matter 601 is fixed.
Preferably, when the dome light source was bowl-shape dome light source, the angle of the primary optical axis of line scan camera 603 taking lenss and the horizontal plane of radium-shine printed matter can be in 40 °～80 ° scope.In above-mentioned span, line scan camera 603 at the sweep trace of radium-shine printed matter 601 photographs outside the illumination dark space that the open top of bowl-shape dome light source causes.Determining of the span of above-mentioned angle, mainly based on following reason: the top center opening radius of bowl-shape dome light source is relatively large, its bottom center's light lacks vertical incidence light, the shadow region can appear in the light field center at bowl-shape dome light source, and the image acquisition of line scan camera need be avoided this shadow region.
When the dome light source is column dome light source, because the open top of column dome light source is generally linear slit, its gap width is less relatively, the shadow region area at light field center is less relatively, and when detecting, the image acquisition of line scan camera can not avoided this zone, so, when adopting column dome light source, the angle of the primary optical axis of line scan camera taking lens and the horizontal plane of radium-shine printed matter can be 90 ° right angle, perhaps less than 90 ° oblique angle.
Among the utility model embodiment one, the travelling belt of the radium-shine printed matter of carrying can be replaced to rewinding machine, rewinding machine is mainly used in bending the quality testing of soft radium-shine printed matter, as shown in Figure 7, radium-shine printed matter 701 lies in a horizontal plane in the horizontal transmission band portion of rewinding machine 702, continuous motion under the drive of rewinding machine power wheel.Similar among relative position relation between rewinding machine 702, line scan camera 703 and the dome light source 704 and Fig. 6, be not described in detail in this.
Embodiment two:
As shown in Figure 8, in the radium-shine press quality amount detection systems that the utility model embodiment two provides, be used to carry the bogey employing circular drum 801 of radium-shine printed matter, the curved outside surfaces that fit in this circular drum 801 in radium-shine printed matter 802 surfaces are placed.
Between line scan camera 803 and circular drum, the dome light source 804 (can be bowl-shape dome light source or column dome light source) of stationkeeping is installed, the bottom surface of dome light source 804 is parallel to the section of radium-shine printed matter 802 curved surfaces, and apart from this section be 1～15mm apart from size, so that the illumination that brightness is more even, direction is more at random to be provided.
The opening that line scan camera 803 sees through dome light source 804 tops carries out the line sweep shooting to the radium-shine printed matter that is placed on the circular drum 801.
Angle between the section of the primary optical axis of the taking lens of line scan camera 803 and radium-shine printed matter curved surfaces is fixed.
Similar with embodiment one, when dome light source 804 was bowl-shape dome light source, preferably, the angle in the primary optical axis of line scan camera 803 taking lenss and the section of radium-shine printed matter curved surfaces can be in 40 °～80 ° scope.Make line scan camera 803 at the sweep trace of radium-shine printed matter 802 photographs outside the illumination dark space that the open top of bowl-shape dome light source causes.
When dome light source 804 was column dome light source, the angle in the section of the primary optical axis of line scan camera 803 taking lenss and radium-shine printed matter 802 curved surfaces can be for 90 ° of right angles or less than 90 ° oblique angle.
Embodiment three:
Among the utility model embodiment three, adopt area array cameras that the image of radium-shine printed matter is gathered, the shooting principle of the line scan camera among area array cameras and the embodiment one, two is different, area array cameras is that whole radium-shine printed matter is once taken the collection that can finish its entire image, therefore, radium-shine printed matter can be positioned on the horizontal bearing face of bogey statically, and does not need to carry out continuous motion.
As shown in Figure 9, in the radium-shine press quality amount detection systems that the utility model embodiment three provides, radium-shine printed matter 901 horizontal stationary are positioned on the surface level of bogey 902, between radium-shine printed matter 901 and area array cameras 904, be installed with dome light source (can be bowl-shape dome light source or column dome light source) 903, opening is arranged at dome light source 903 tops, and area array cameras 904 is taken radium-shine printed matter by the open top of dome light source 903.
Preferably, for fear of the illumination dark space that 903 open tops of dome light source cause, can also a coaxial light source 905 be installed at the top of dome light source 903, so that the illumination in dome light source center zone to be provided.
Because area array cameras is once to take imaging, if the angle of the horizontal surface of the primary optical axis of its camera lens and radium-shine printed matter is the oblique angle, the image of its shooting often has distortion to a certain degree so, therefore, among the utility model embodiment three, for accuracy and the reliability that guarantees the image that area array cameras photographs, area array cameras sees through the opening at dome light source top and perpendicular to the horizontal surface of radium-shine printed matter radium-shine printed matter is taken.
The utility model is not limited to above-mentioned embodiment; no matter radium-shine printed matter is horizontal positioned, vertically places or place horizontal by certain angle; everyly between camera (can be line scan camera or area array cameras) and radium-shine printed matter, arrange even diffused light source; and the relative position relation between them makes line scan camera (or area array cameras) to carry out line sweep to the radium-shine printed matter of even diffused light source irradiation and takes, all drops within the protection domain of the present utility model.
The radium-shine press quality amount detection systems that the utility model embodiment provides, because at radium-shine printed matter with gather the even diffused light source that stationkeeping is installed between the camera of radium-shine printed matter image, use even diffused light source that radium-shine printed matter is shone, made full use of even diffused light source incident light in the plane property at random basically identical, the even brightness characteristics, the color fringe and the light beam of its quality testing appears disturbing in the radium-shine printed matter image of having avoided being gathered, and improved the reliability of radium-shine press quality amount detection systems.
Further, the radium-shine press quality amount detection systems that the utility model embodiment provides, at even diffused light source is under the situation of bowl-shape dome light source, be certain included angle (this angle in the radium-shine printed matter testing process is fixed) between the section of the primary optical axis of line scan camera camera lens and the horizontal surface of radium-shine printed matter or curved surfaces, make line scan camera at the sweep trace on the radium-shine printed matter outside the illumination dark space that the open top of dome light source causes, further guaranteed the result's of line scan camera photographic images accuracy and reliability.
The radium-shine press quality amount detection systems that the utility model embodiment provides, can also be under the situation that adopts area array cameras radium-shine printed matter to be taken by the open top of dome light source (area array cameras with this radium-shine printed matter surface is vertical take), the illumination dark space of causing for fear of the open top of dome light source impacts captured image, top at the dome light source increases a coaxial light source, the illumination dark space that forms for the open top of dome light source provides illumination, make the integral image brightness unanimity of the radium-shine printed matter that area array cameras is taken, further guaranteed the result's of area array cameras photographic images accuracy and reliability.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (15)
1, a kind of radium-shine press quality amount detection systems, comprise: the camera of bogey and the radium-shine printed matter image of collection, radium-shine printed matter is positioned on the described bogey, described camera is fixedly mounted in the peripheral region of described radium-shine printed matter, it is characterized in that, also comprise: even diffused light source; Described even diffused light source is fixedly mounted between described radium-shine printed matter and the described camera.
2, the system as claimed in claim 1 is characterized in that, described even diffused light source is the dome light source.
3, system as claimed in claim 2 is characterized in that, described camera adopts line scan camera, and opening is arranged at the top of described dome light source, makes described line scan camera can see through described opening described radium-shine printed matter is carried out line sweep.
4, system as claimed in claim 3 is characterized in that, described bogey adopts travelling belt or rewinding machine; Described radium-shine printed matter is placed horizontally on the horizontal bearing face of travelling belt or rewinding machine, and follows its continuous motion; The bottom surface of described dome light source is parallel to the horizontal surface of radium-shine printed matter.
5, system as claimed in claim 3 is characterized in that, described bogey adopts circular drum, and the curved outside surface that fits in described circular drum of described radium-shine printed matter surface is placed, and follows its continuous motion; The bottom surface of described dome light source is parallel to the section of described radium-shine printed matter curved surfaces.
6, system as claimed in claim 4 is characterized in that, the size of the described radium-shine printed matter horizontal surface of described dome light source bottom surface distance is 1～15mm.
7, system as claimed in claim 5 is characterized in that, the section size of the described radium-shine printed matter curved surfaces of described dome light source bottom surface distance is 1～15mm.
8, system as claimed in claim 6, it is characterized in that, described dome light source adopts bowl-shape dome light source, angle between the primary optical axis of described line scan camera camera lens and the horizontal surface of described radium-shine printed matter is fixed, described angle make described line scan camera at the sweep trace on the described radium-shine printed matter outside the illumination dark space that the open top of described dome light source causes.
9, system as claimed in claim 7, it is characterized in that, described dome light source adopts bowl-shape dome light source, angle between the section of the primary optical axis of described line scan camera camera lens and the curved surfaces of described radium-shine printed matter is fixed, described angle make described line scan camera at the sweep trace on the described radium-shine printed matter outside the illumination dark space that the open top of described dome light source causes.
10, system as claimed in claim 8 or 9 is characterized in that the span of described angle is 40 °～80 °.
11, as claim 4 or 5 described systems, it is characterized in that, described dome light source adopts column dome light source, and the angle between the primary optical axis of described line scan camera camera lens and the horizontal surface of described radium-shine printed matter is fixed, and described angle is right angle or oblique angle.
As right 11 described systems, it is characterized in that 12, the size in described radium-shine printed matter horizontal surface of described column dome light source distance or section is 1～15mm.
13, system as claimed in claim 2, it is characterized in that, described camera adopts area array cameras, described radium-shine printed matter horizontal stationary is positioned on the described bogey, opening is arranged at described dome light source top, and described area array cameras can be taken described radium-shine printed matter by described opening.
14, system as claimed in claim 13 is characterized in that, the primary optical axis of described area array cameras camera lens and the Surface Vertical of described radium-shine printed matter, and the top open part of described dome light source is equipped with coaxial light source.
15, as claim 2 to 9,13 to 14 each described systems, it is characterized in that described dome light source comprises: dome-shaped reflecting plate and the light emitting diode that is positioned at dome-shaped reflecting plate bottom.
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| CNU2009201050445U CN201348611Y (en) | 2009-01-12 | 2009-01-12 | Quality detecting system for laser printed matter |
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| CNU2009201050445U CN201348611Y (en) | 2009-01-12 | 2009-01-12 | Quality detecting system for laser printed matter |
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| CN105044118B (en) * | 2015-08-17 | 2018-01-02 | 东莞市神州视觉科技有限公司 | A kind of AOI light sources |
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