CN212871471U - Printing quality detection system based on machine vision technology - Google Patents
Printing quality detection system based on machine vision technology Download PDFInfo
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- CN212871471U CN212871471U CN202020852397.8U CN202020852397U CN212871471U CN 212871471 U CN212871471 U CN 212871471U CN 202020852397 U CN202020852397 U CN 202020852397U CN 212871471 U CN212871471 U CN 212871471U
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Abstract
The utility model relates to a printing quality detecting system based on machine vision technique comprises light source module, optical lens, camera, image information processing module and actuating mechanism four major parts, and light source, optical lens and camera setting are on the support, the support includes the cradling piece and the support horizontal pole of perpendicular setting, optical lens sets up on the support horizontal pole, light source module is including being used for vertical light source, and low angle light source, vertical light source present the annular, and the cover is parallel with optical lens on optical lens, low angle light source sets up on the cradling piece. The utility model has the advantages that: the position of adjustable light source, the illumination height, the illumination problem of the different printed matter of size is solved to the scope, solves the image that special area gathered through low angle light source, diffuse reflection and polarizer and spills over, causes the problem that detects the precision reduction or can't detect at all.
Description
Technical Field
The utility model relates to a machine vision technical field, in particular to printing quality detection system based on machine vision technique.
Background
The quality of printing, in particular colour printing, is mainly reflected in colour, which, once distorted, affects the printing of the whole batch. And the printed ink, gold stamping, laser anti-counterfeiting mark or other printed marks can not meet the requirement of general illumination.
Disclosure of Invention
For overcoming prior art's defect, the utility model provides a printing quality detects system based on machine vision technique is realized through following technical scheme.
A printing quality detection system based on a machine vision technology is composed of a light source module, an optical lens, a camera, an image information processing module and an execution mechanism, wherein an illumination light source, the optical lens and the camera are arranged on a support, the support comprises a support rod and a support cross rod which are vertically arranged, the optical lens is arranged on the support cross rod, the light source module comprises a vertical light source and a low-angle light source, the vertical light source is annular and is sleeved on the optical lens and parallel to the optical lens, and the low-angle light source is arranged on the support rod.
Furthermore, a polarized lens is arranged on the lens.
Further, the vertical light source is one of an LED lamp, a high frequency fluorescent lamp or a halogen lamp, and a diffuse reflection plate is disposed around the vertical light source.
Further, the low-angle light source is arranged on the support rod, and the vertical light source is one of an LED lamp, a high-frequency fluorescent lamp or a halogen lamp.
The utility model has the advantages that: the position of adjustable light source, the illumination height, the illumination problem of the different printed matter of size is solved to the scope, solves the image that special area gathered through low angle light source, diffuse reflection and polarizer and spills over, causes the problem that detects the precision reduction or can't detect at all.
Drawings
Fig. 1 is a schematic view of a bracket structure of the illumination light source of the present invention.
FIG. 2 is a schematic view of a bracket structure of the illumination light source in one embodiment.
FIG. 3 is a schematic view of a bracket structure of an illumination light source in another embodiment.
Fig. 4 is a right side view of fig. 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
A printing quality detection system based on machine vision technology is composed of an illumination light source, an optical lens, a camera, an image information processing module and an execution mechanism. The detection system also comprises a conveyor belt, a computer and the like.
The lighting source, the optical lens and the camera are arranged on the bracket, the image information processing module is arranged in the computer, and the executing mechanism comprises a conveyor belt, a control button and other control modules and auxiliary devices. The utility model discloses a focus is lighting source, promotes the illumination quality through the photo light source through following embodiment to it takes the clearer printed matter photo to be the camera, compares according to the photo again, analyzes the quality of printed matter. The illumination source is important in the overall system and is described below with specific embodiments.
The conveyer belt sets up in printer play paper end for convey the printed matter through the conveyer belt and reach the detection zone with printing.
The detection area mainly is light source and camera lens, and light source and camera lens setting are on the support of detection area, and the support includes support and support horizontal pole, support horizontal pole and conveyer belt, wherein at the conveyer belt optical lens sets up on the support horizontal pole, light source module is including being used for vertical light source, low angle light source, and vertical light source presents the annular, overlaps on the camera lens and is parallel with the camera lens, low angle light source sets up on the cradling piece.
In the embodiment of the present invention, as shown in fig. 1-4, the bracket includes a base 1, the base is fixed on the workbench through screws, and the edge of the detection area or the outer edge of the detection area can be used. Fixed cradling piece 2 on the base, cradling piece 2 is perpendicular to detection zone, opens one or more lamp holes 14 on the cradling piece for install LED lamp or other lamps in the lamp hole from the side shine the workstation, form the low angle light source. The support rod 2 is also provided with a cross rod fixing frame 4 for fixing the support cross rod 3, and the support cross rod and the support rod are vertically arranged. The top of the bracket rod is also provided with a straight rod adjuster 6 for adjusting the height of the fixing frame 4. The support cross rod is provided with a fixing block 5, and the position of the fixing block 5 can be adjusted through a cross rod adjuster 7 on the support cross rod 3. The position, the irradiation height, the range and the like of a required light source are determined by the bracket.
The camera is fixed in the fixing block 5, an optical lens 11 is installed on the camera, and a polarized lens can be selectively installed on the optical lens. The optical lens 11 is provided with a vertical light source, and in one embodiment, the optical lens is provided with a ring-shaped LED lamp which is at the same level with the lens to prevent mutual influence. In other embodiments, the vertical light source and the optical lens are mounted on the fixing block 5 with a certain interval therebetween.
The straight rod adjuster 6 and the cross rod adjuster 7 are adjusted through ball screws located in the support rods 2 and the support cross rods 3, the adjuster is rotated, the positions of the fixing frame 4 and the fixing block 5 can be adjusted, and the fixing frame 4 and the fixing block 5 are connected with nuts of the ball screws through screws respectively.
The fixed block 5 also comprises a diffuse reflection plate 13, and the diffuse reflection plate 13 is conical and comprises a vertical light source.
The light source has a light emission spectrum close to that of sunlight, and is ensured to have sufficient brightness and uniform brightness in the whole illumination area. Secondly, through setting up diffuse reflection board and low angle light source, can avoid some special areas of high reflectivity on the printed matter, such as: gold stamping, laser anti-counterfeiting marks and the like cause overflow of the acquired images, so that the detection precision is reduced or the detection cannot be carried out at all.
In an embodiment of the invention, the camera is an industrial camera, such as a color line scan camera with model JAI LT-400CL 3CMOS, 4K resolution, pixel size 7 μm; the line frequency can reach 18 KHz; excellent color reproducibility. Or adopting JAI CV-L107CL 3CCD color line scanning camera with 2K resolution and 14 μm pixel size; the line frequency can reach 18 KHz; excellent color reproducibility.
The optical lens adopts a Kowa 3CCD lens, and has various optional focal lengths of 28mm, 35mm, 50mm and the like; is a special lens for a 3CCD camera.
The image information processing module comprises a video acquisition card, adopts an acquisition card with the model of Teledyne DALSA xcellera-CLPX 4, can support Camera Link Dual Base Camera input, and is suitable for a Dual Camera system; inserting a video acquisition card PCI Express X4 slot; compatible PoCL; the image acquisition speed can reach 850MB/s at most; the maximum speed of image transfer to the host can be up to 1024 MB/s.
The computer mainly distinguishes colors accurately by processing pictures of the video acquisition card, and requires an imaging device to have good color reducibility. The prism beam splitting camera can realize the automatic registration of RGB components, does not generate halation, and obtains better color effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The printing quality detection system based on the machine vision technology is characterized in that the optical lens is arranged on a support cross rod, the light source module comprises a vertical light source and a low-angle light source, the vertical light source is annular and is sleeved on the lens and parallel to the lens, and the low-angle light source is arranged on the support cross rod.
2. The print quality detection system of claim 1, wherein a polarizing lens is further disposed on the lens.
3. The printing quality detecting system according to claim 1, wherein the vertical light source is one of an LED lamp, a high frequency fluorescent lamp, or a halogen lamp, and a diffuse reflection plate is provided around the vertical light source.
4. The print quality detection system of claim 1, wherein the low angle light source is disposed on a support bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020852397.8U CN212871471U (en) | 2020-05-20 | 2020-05-20 | Printing quality detection system based on machine vision technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020852397.8U CN212871471U (en) | 2020-05-20 | 2020-05-20 | Printing quality detection system based on machine vision technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212871471U true CN212871471U (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020852397.8U Active CN212871471U (en) | 2020-05-20 | 2020-05-20 | Printing quality detection system based on machine vision technology |
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| CN (1) | CN212871471U (en) |
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2020
- 2020-05-20 CN CN202020852397.8U patent/CN212871471U/en active Active
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