CN207763923U - A kind of CCD detection devices of light diffusing sheet - Google Patents
A kind of CCD detection devices of light diffusing sheet Download PDFInfo
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- CN207763923U CN207763923U CN201721382300.6U CN201721382300U CN207763923U CN 207763923 U CN207763923 U CN 207763923U CN 201721382300 U CN201721382300 U CN 201721382300U CN 207763923 U CN207763923 U CN 207763923U
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- diffusing sheet
- light diffusing
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Abstract
A kind of CCD detection devices of light diffusing sheet, including：LED light source, detection platform, CCD camera, sensor, image analyzer, PLC programmable logic controller (PLC)s.Wherein sensor can accurately perceive the size of light diffusing sheet, according to the scan frequency of the size adjust automatically CCD camera of light diffusing sheet, clearly detect the light transmittance of light diffusing sheet, determine the size of the position of stain and stain in light diffusing sheet.The utility model is applied widely, easy to use, detection is accurate.
Description
Technical field
The utility model belongs to field of optical detection, the CCD detection devices of specially a kind of light diffusing sheet.
Background technology
Light diffusing sheet is the diffusion layer for plastic basis material with PMMA/PC/PE/PS/PP/PVC/PFT etc., is added in the substrate
Inorganic or organic light diffusing agent, when light passes through light diffusing sheet, when encountering the diffusion particle different with its refractive index, it may occur that
Multi-direction, multi-angle refraction, reflection and scattering phenomenon obtain optics diffusion effect with this.Light diffusing sheet has certain
Property requirements it requires that its material and diffusion particle therein mix a variety of material agent such as antistatic property, light transmittance, mist degree,
The light transmittance of middle light diffusing sheet refers to the luminous flux and the ratio between the luminous flux being mapped on sample through sample, is indicated with percentage；
The mist degree of light diffusing sheet refers to the ratio between deviateing scatter light flux and the transmitted light flux of incident light direction through sample, uses percentage
Number indicates, under normal conditions the scatter light flux for deviateing incident 2.5 degree of light direction or more is used to calculate mist degree, mist degree and light transmission
Rate is often inversely.
With commonly used, the normal conditions also higher and higher to the manufacturing technique requirent of diffuser plate of diffuser plate in recent years
Under, the detection of diffuser plate appearance predominantly detects bubble, salient point, impurity, the miscellaneous line in surface etc., for spreading board finished product under conventional situation
Detection be mostly the detection of artificial microscope method, this method not only labor intensive, detection time is long, and accuracy of detection also has
It is short of；In addition, can only also detect the yields of finished product using automatic detection device, cannot be accurately detected in each product
The size of underproof position and unqualified position.
Utility model content
In order to solve the above-mentioned technical problem, the utility model proposes a kind of CCD detection devices of light diffusing sheet, including：LED
Light source, detection platform, CCD camera, sensor, image analyzer, PLC programmable logic controller (PLC)s.Wherein sensor setting exists
In detection platform, the position of light diffusing sheet can be accurately perceived, the bottom of detection platform is mounted with that LED light source comes to light diffusing sheet
Detection, which provides light source and shot to CCD camera, carries out light filling, and image analyzer is divided according to the image that CCD camera acquires
Analysis, analyzes the position in the region of light transmittance ＜ 55% and size in light diffusing sheet, and the utility model is applied widely, user
Just, detection is accurate.
A kind of CCD detection devices of light diffusing sheet, including：LED light source 1, detection platform 2, CCD camera 3, sensor 4, shadow
As analyzer 5, PLC programmable logic controller (PLC)s 6.The light diffusing sheet is positioned in detection platform 2, the detection platform
LED light source 1 is installed in 2 lower section, is mounted with that sensor 4,2 top of detection platform are mounted in the detection platform 2
CCD camera 3, the CCD camera 3 are connect with image analyzer 5, the PLC programmable logic controller (PLC)s 6 and sensor 4,
CCD camera 3, image analyzer 5 are separately connected.
Further, at work, the detection platform 2 is used for placing light diffusion to the CCD detection devices of light diffusing sheet
Plate, under normal circumstances, a length of 0.8m~1.2m of the light diffusing sheet, width is 0.6m~0.8m, it is preferred that detection platform
A length of 1.2m~1.5m, width are 0.8m~1.0m.
Further, the bottom of the detection platform 2 is mounted with LED light source 1, and main there are two effect, one is given
CCD camera 3, which is taken pictures, carries out light filling, the images dim for effectively avoiding CCD camera 3 from being clapped, analysis difficulty；Secondly, want detection light to expand
The light transmittance to fall apart needs certain light source, so LED light source 1 provides uniform light source for light diffusion, it is preferred that LED
Light source 1 is that line clears off at least one of source, item light.
Further, it is mounted with that sensor 4, the sensor 4 are position sensor in the detection platform 2, it can
Detection platform 2 is reached accurately to perceive light diffusing sheet.
Further, the CCD camera 3 is mainly used to take pictures detection to light diffusing sheet, and CCD is charge coupled cell,
Optical image can be converted into digital signal, the small photoactive substance being implanted on CCD is known as pixel, includes on one piece of CCD
Pixel is more, and the screen resolution provided is higher.Under normal conditions, CCD camera 3 mainly has linear array CCD camera knead dough battle array CCD
Camera, it is preferred that the image resolution ratio and precision of linear array CCD camera scanning are higher than area array CCD camera.Further, will
The length of light diffusing sheet is defined as X-direction, wide to be defined as Y-direction, is all divided into equidistant minizone, Mei Gequ in each direction
Between length be 1um~5um, i.e., CCD camera 3 every time scanning light diffusing sheet capture point minimum unit be 1um × 1um~5um
×5um.Further, the image analyzer 5 is mainly used to show the image of CCD camera acquisition, according to the figure acquired
The light transmittance of picture, to judge the size of the position of stain and stain on light diffusing sheet.
Further, the PLC programmable logic controller (PLC)s 6 mainly control the working condition of each equipment, work as sensing
When device 4 sends out light diffusing sheet location information, PLC programmable logic controller (PLC)s 6 control CCD camera 3 and start to acquire image；Image is adopted
After collection is completed, image is conveyed to image analyzer 5 by PLC programmable logic controller (PLC)s 6, and image analyzer starts to analyze figure
The size and location of stain in shape.
Using the CCD detection devices of light diffusing sheet as described above, clearly the black of light diffusing sheet can be found out from image
Point position and stain size.Specifically, irradiating light diffusing sheet by LED light source, CCD camera acquires the light transmission of light diffusing sheet
Rate, image analyzer analyze the light transmittance of acquired image each region, light transmittance ＜ 55%, it is believed where there is stain, into
One step goes out the contrast conting of picture element module the size of stain.
Description of the drawings：
Specific implementation mode is described further below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the overall structure figure of the utility model.
Primary structure number explanation
| LED light source | 1 |
| Detection platform | 2 |
| CCD camera | 3 |
| Sensor | 4 |
| Image analyzer | 5 |
| PLC programmable logic controller (PLC)s | 6 |
Following specific implementation mode will further illustrate the utility model in conjunction with above-mentioned attached drawing.
Specific implementation mode
Case 1 is embodied：
A kind of CCD detection devices of light diffusing sheet, including：LED light source 1, detection platform 2, CCD camera 3, sensor 4, shadow
As analyzer 5, PLC programmable logic controller (PLC)s 6.The light diffusing sheet is positioned in detection platform 2, the detection platform
LED light source 1 is installed in 2 lower section, and LED light source 1 clears off for line and is mounted with position sensor 4 in the detection platform 2 described in source, described
The top of detection platform 2 be mounted with that CCD camera 3, the CCD camera 3 are connect with image analyzer 5, the PLC may be programmed
Logic controller 6 is connect with sensor 4, CCD camera 3, image analyzer 5.
Wherein the length of light diffusing sheet is 0.85m, width 0.78m, by the X of light diffusing sheet and the minimum list of Y-direction segmentation
The space of first 1um × 1um, CCD camera carry out light diffusing sheet Image Acquisition, and impact analysis device analyzes diffuser plate light transmittance ＜
55% region is stain position, the position of stain one：X-direction range 10um~10.5um, Y-direction range 18um~20um,
One size 1um of stain2；The position of stain two：X-direction range 800000um~800002um, Y-direction range 16um~17um,
Two size 2um of stain2。
Case 2 is embodied：
A kind of CCD detection devices of light diffusing sheet, including：LED light source 1, detection platform 2, CCD camera 3, sensor 4, shadow
As analyzer 5, PLC programmable logic controller (PLC)s 6.The light diffusing sheet is positioned in detection platform 2, the detection platform
LED light source 1 is installed in 2 lower section, and LED light source 1 is to be mounted with position sensor 4, the inspection in detection platform 2 described in item light
It surveys 2 top of platform and is mounted with that CCD camera 3, the CCD camera 3 are connect with image analyzer 5, the PLC programmable logic
Controller 6 is connect with sensor 4, CCD camera 3, image analyzer 5.
Wherein the length of light diffusing sheet is 1m, width 0.78m, and the X of light diffusing sheet and Y-direction are divided minimum unit
The space of 1um × 1um, CCD camera carry out light diffusing sheet Image Acquisition, and impact analysis device analyzes diffuser plate light transmittance ＜ 55%
Region be stain position, the position of stain one：X-direction range 38um~45um, Y-direction range 18.6um~19.6um are black
One size 7um of point2；The position of stain two：X-direction range 900000um~900012um, Y-direction range 16um~16.5um,
Two size 6um of stain2。
Case 3 is embodied：
A kind of CCD detection devices of light diffusing sheet, including：LED light source 1, detection platform 2, CCD camera 3, sensor 4, shadow
As analyzer 5, PLC programmable logic controller (PLC)s 6.The light diffusing sheet is positioned in detection platform 2；The detection platform
LED light source 1 is installed in 2 lower section, and LED light source 1 is that line clears off source；It is mounted with position sensor 4 in the detection platform 2；Institute
2 top of detection platform stated is mounted with CCD camera 3；The CCD camera 3 is connect with image analyzer 5；The PLC can be compiled
Journey logic controller 6 is connect with sensor 4, CCD camera 3, image analyzer 5.
Wherein the length of light diffusing sheet is 1m, width 0.6m, by the X of light diffusing sheet and Y-direction segmentation minimum unit 1um
The space of × 1um, CCD camera carry out light diffusing sheet Image Acquisition, and impact analysis device analyzes diffuser plate light transmittance ＜'s 55%
Region is stain position, the position of stain one：X-direction range 10um~12.8um, Y-direction range 18.6um~19.6um are black
One size 2.8um of point2；The position of stain two：X-direction range 900058um~900060um, Y-direction range 500058um~
500060um, two size 4um of stain2。
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of CCD detection devices of light diffusing sheet, including：LED light source, detection platform, CCD camera, sensor, image analysing computer
Device, PLC programmable logic controller (PLC)s, the light diffusing sheet are positioned in detection platform；Pacify the lower section of the detection platform
Fill LED light source；It is mounted with sensor in the detection platform；It is mounted with CCD camera above the detection platform；Described
CCD camera is connect with image analyzer；The PLC programmable logic controller (PLC)s and sensor, CCD camera, image analyzer
Connection.
2. the CCD detection devices of light diffusing sheet as described in claim 1, it is characterised in that：The detection platform it is a length of
1.2m~1.5m, width are 0.8m~1.0m.
3. the CCD detection devices of light diffusing sheet as described in claim 1, it is characterised in that：The LED light source clears off for line
At least one of source, item light.
4. the CCD detection devices of light diffusing sheet as described in claim 1, it is characterised in that：The sensor passes for position
Sensor can accurately perceive the position that light diffusing sheet reaches detection platform.
5. the CCD detection devices of the light diffusing sheet as described in any one of Claims 1 to 4, it is characterised in that：Described
It is 1um × 1um~5um × 5um that CCD camera scans light diffusing sheet and captures the minimum unit of point every time, mainly by spreading light
The length of plate is defined as X-direction, wide to be defined as Y-direction, is all divided into equidistant minizone, the length in each section in each direction
Degree is 1um~5um.
6. the CCD detection devices of the light diffusing sheet as described in any one of Claims 1 to 4, it is characterised in that：Described
LED light source is that CCD camera shoots light filling, acquired images dim, unintelligible is avoided, in addition with LED light source as light diffusing sheet
The detection light source of light transmittance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721382300.6U CN207763923U (en) | 2017-10-25 | 2017-10-25 | A kind of CCD detection devices of light diffusing sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721382300.6U CN207763923U (en) | 2017-10-25 | 2017-10-25 | A kind of CCD detection devices of light diffusing sheet |
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| Publication Number | Publication Date |
|---|---|
| CN207763923U true CN207763923U (en) | 2018-08-24 |
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| CN201721382300.6U Active CN207763923U (en) | 2017-10-25 | 2017-10-25 | A kind of CCD detection devices of light diffusing sheet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397857A (en) * | 2020-04-01 | 2020-07-10 | 杭州欧光芯科技有限公司 | Engineering uniform light sheet detection device and method |
-
2017
- 2017-10-25 CN CN201721382300.6U patent/CN207763923U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397857A (en) * | 2020-04-01 | 2020-07-10 | 杭州欧光芯科技有限公司 | Engineering uniform light sheet detection device and method |
| CN111397857B (en) * | 2020-04-01 | 2022-02-11 | 杭州欧光芯科技有限公司 | Engineering uniform light sheet detection device and method |
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