CN210322833U - Appearance detection device for solar cell - Google Patents
Appearance detection device for solar cell Download PDFInfo
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- CN210322833U CN210322833U CN201920323563.2U CN201920323563U CN210322833U CN 210322833 U CN210322833 U CN 210322833U CN 201920323563 U CN201920323563 U CN 201920323563U CN 210322833 U CN210322833 U CN 210322833U
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- 238000003672 processing method Methods 0.000 abstract description 5
- 230000003760 hair shine Effects 0.000 abstract description 2
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Abstract
The utility model provides an appearance detection device of solar cell, which comprises a camera bellows, a camera, a light source barrel, an annular light source, a white backing plate, a detected solar cell, a light source barrel, a white backing plate and a detecting device, wherein the camera, the light source barrel and the annular light source are arranged in the camera bellows; the camera is fixed on the upper part of the camera bellows, the light source barrel is fixed on the lower part of the camera bellows, the annular light source is fixed on the bottom of the camera bellows, and the annular light source is positioned below the light source barrel. The camera is connected with the computer through an industrial camera interface, the computer controls real-time acquisition and result analysis of the camera, and the parallel detection of grid line defects, surface defects, color grading and other appearance qualities of the solar cell can be realized by using a digital image processing method, so that the intellectualization and the comprehensiveness of the detection of the solar cell are improved; through set up light source bucket and light guide plate in the camera bellows, the degree of consistency that the guarantee light source shines avoids external environment's interference, has improved the detection precision.
Description
Technical Field
The utility model relates to a check out test set technical field, concretely relates to solar wafer's outward appearance detection device.
Background
With the reduction of natural resources of the earth and the serious environmental pollution, solar energy as renewable resources is gradually noticed by people, the application of solar cells is more and more extensive, and the appearance defect detection directly related to the quality of the solar cells is more and more important.
According to statistics, the items for detecting the appearance defects of the solar cell mainly comprise grid line detection, color detection, dirt detection, scratch detection, color spot detection, crystal detachment detection and the like. At present, a plurality of automatic detection devices and methods for the appearance quality of a battery piece are provided, and through retrieval, patent CN206490044A discloses a solar battery piece surface defect detection system, which mainly detects defects on the front surface of the battery piece and sorts colors, but does not describe the detection devices and specific detection methods in detail; the patent CN107768269A discloses a method for detecting the appearance smudge defect of a polycrystalline silicon solar cell, which realizes the detection of the smudge defect characteristics, only has a single defect detection function, and cannot detect other surface defects; patent CN108674026A discloses a method and a system for detecting the printing quality of a solar cell, which realizes the detection of the printing quality problem of grid lines on the front and back surfaces of the solar cell, but cannot detect the defects on the surface of the solar cell; patent CN106990120A discloses a quality detection method and a detection device for solar cells, which utilize an OTC detection system to obtain a three-dimensional image to realize non-contact and non-destructive detection, but the method has a slow detection speed, cannot detect the color defect of a cell, and is not suitable for large-scale production detection in a factory; therefore, a system with high detection speed and comprehensive detection is urgently needed in the market at present.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem existing in the prior art, the utility model provides a solar wafer's outward appearance detection device has that detection speed is fast, detect comprehensive characteristics.
The utility model provides a technical scheme of above-mentioned problem does: an appearance detection device of a solar cell comprises a camera, a lens, an annular light source, a camera bellows, a light source barrel, a light guide plate, a white base plate, a power supply, a light source controller, a computer, a camera power line, a light-operated power line, an external trigger line, a data line, an industrial camera interface and a detected solar cell;
a supporting plate is arranged in the camera bellows, the supporting plate is fixed at the upper part of the camera bellows, the camera is vertically fixed on the supporting plate, the lens is arranged on the camera, and the lens faces downwards;
a light source barrel is arranged in the dark box and is fixed at the lower part of the dark box; the light source barrel comprises a hemispherical upper cover and a cylindrical side wall, the hemispherical upper cover is positioned above the cylindrical side wall, and the hemispherical upper cover and the cylindrical side wall are connected into a whole;
an annular light source is arranged in the dark box, the annular light source is fixed at the bottom of the dark box, and the annular light source is positioned below the light source barrel; a light guide plate is arranged between the annular light source and the light source barrel, the cross section of the light guide plate is arc-shaped, and two ends of the light guide plate are respectively connected with the side wall of the dark box and the bottom surface of the dark box;
the white backing plate is positioned under the dark box, the solar cell to be detected is placed on the white backing plate, and the distance between the solar cell to be detected and the lens is 306-380 mm.
Further, the power supply is respectively connected with the camera and the light source controller through a camera power line and a light-operated power line, and the light source controller is connected with the camera through an external trigger line; the light source controller is connected with the annular light source through a data line; the camera is connected with a computer through an industrial camera interface, the computer controls real-time acquisition and result analysis of the camera, and the computer performs defect analysis through a digital image processing method.
Further, the digital image processing method comprises surface defect detection, grid line defect detection and color defect grading;
the surface defect detection is to filter the grid lines by using median filtering, then divide the defects from the background by using a dynamic threshold value, and screen the defects by gray level and shape characteristics to measure the defect area;
the grid line defect detection comprises the steps of firstly extracting a grid line region, then analyzing the shape characteristics of the region to screen broken grid lines and over-thick grid lines of the grid lines, and finally obtaining the line thickness and the height of the broken grid lines through measurement;
and the color defect grading is to grade by using a hue space, and when the hue of an area with too deep color cannot be distinguished, other color spaces are used for assisting judgment.
The utility model discloses beneficial effect has:
(1) the utility model discloses can realize the parallel detection to multiple outward appearance qualities such as solar wafer grid line defect, surface defect, colour stepping, improve the intellectuality and the comprehensiveness that solar wafer detected.
(2) The utility model discloses set up light source bucket and light guide plate in the camera bellows, the degree of consistency that the guarantee light source shines avoids external environment's interference, has improved the detection precision.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an electrical connection diagram of the present invention.
Fig. 3 is a flow chart of the appearance defect detection of the solar cell to be detected.
In the figure: 1-camera, 2-lens, 3-annular light source, 4-camera bellows, 5-light source barrel, 6-light guide plate, 7-white backing plate, 8-power supply, 9-light source controller, 10-computer, 11-camera power line, 12-light control power line, 13-external trigger line, 14-data line, 15-industrial camera interface.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
An appearance detection device of a solar cell comprises a camera 1, a lens 2, an annular light source 3, a camera bellows 4, a light source barrel 5, a light guide plate 6, a white cushion plate 7, a power supply 8, a light source controller 9, a computer 10, a camera power line 11, a light control power line 12, an external trigger line 13, a data line 14 and an industrial camera interface 15;
the camera bellows 4 can avoid the influence of ambient light on detection, a support plate is arranged in the camera bellows 4 and fixed at the upper part of the camera bellows 4, the camera 1 is vertically fixed on the support plate, the lens 2 is arranged on the camera 1, and the lens 2 faces downwards;
a light source barrel 5 is arranged in the dark box 4, and the light source barrel 5 is fixed at the lower part of the dark box 4; the light source barrel 5 comprises a hemispherical upper cover and a cylindrical side wall, the hemispherical upper cover is positioned above the cylindrical side wall, and the hemispherical upper cover and the cylindrical side wall are connected into a whole;
an annular light source 3 is arranged in the dark box 4, the annular light source 3 is fixed at the bottom of the dark box 4, and the annular light source 3 is positioned below the light source barrel 5; a light guide plate 6 is arranged between the annular light source 3 and the light source barrel 5, the section of the light guide plate 6 is arc-shaped, and two ends of the light guide plate 6 are respectively connected with the side wall of the dark box 4 and the bottom surface of the dark box 4; the light guide plate 6 covers the annular light source 3 to lead out light uniformly, so that the light is prevented from directly irradiating the solar cell to be detected;
the white backing plate 7 is positioned under the dark box 4, the solar cell to be detected is placed on the white backing plate 7, and the disordered background can be effectively filtered through the white backing plate 7, so that the cell image can be better extracted; the distance between the solar cell to be detected and the lens 2 is 306-380 mm;
the power supply 8 is respectively connected with the camera 1 and the light source controller 9 through a camera power line 11 and a light-operated power line 12, and the light source controller 9 is connected with the camera 1 through an external trigger line 13 so as to realize the synchronism of image acquisition and light source light supplement; the light source controller 9 is connected with the annular light source 3 through a data line 14 to realize the illumination control of the light source; the camera 1 is connected with the computer 10 through the industrial camera interface 15, the computer 10 controls the real-time acquisition and result analysis of the camera 1, and the computer 10 realizes the defect analysis of the detected solar cell through a digital image processing method.
The digital image processing method comprises surface defect detection, grid line defect detection and color defect grading;
the surface defect detection is to filter the grid lines by using median filtering, then divide and pick out the defects from the background by using a dynamic threshold value, identify and screen defect types and crystal lattices by gray level and shape characteristics, and measure the defect area;
the grid line defect detection comprises the steps of firstly extracting a grid line region by using a dynamic threshold, then closing the broken grid by closing operation, performing difference operation on the closed region and the region before closing to obtain a grid broken region, and measuring to obtain the height of the broken grid; then, the contrast of the thick line and other grid lines is enhanced through gray level opening operation, the thick line part with larger contrast at the periphery is extracted through an average threshold value, and the line thickness is obtained through measurement;
and the color defect grading is to grade by using a hue space, extract the hue color space, remove grid lines by using a global threshold value, calculate the average value of the whole hue, use other color spaces for auxiliary judgment when the hue of an area with too deep color cannot be distinguished, and convert the area into other planes for color separation.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.
Claims (2)
1. The appearance detection device of the solar cell is characterized by comprising a camera, a lens, an annular light source, a camera bellows, a light source barrel, a light guide plate, a white base plate, a power supply, a light source controller, a computer, a camera power line, a light-operated power line, an external trigger line, a data line, an industrial camera interface and a detected solar cell;
a supporting plate is arranged in the camera bellows, the supporting plate is fixed at the upper part of the camera bellows, the camera is vertically fixed on the supporting plate, the lens is arranged on the camera, and the lens faces downwards;
a light source barrel is arranged in the dark box and is fixed at the lower part of the dark box; the light source barrel comprises a hemispherical upper cover and a cylindrical side wall, the hemispherical upper cover is positioned above the cylindrical side wall, and the hemispherical upper cover and the cylindrical side wall are connected into a whole;
an annular light source is arranged in the dark box, the annular light source is fixed at the bottom of the dark box, and the annular light source is positioned below the light source barrel; a light guide plate is arranged between the annular light source and the light source barrel, the cross section of the light guide plate is arc-shaped, and two ends of the light guide plate are respectively connected with the side wall of the dark box and the bottom surface of the dark box;
the white backing plate is positioned under the dark box, the solar cell to be detected is placed on the white backing plate, and the distance between the solar cell to be detected and the lens is 306-380 mm.
2. The appearance inspection device of a solar cell of claim 1, wherein the power supply is connected to the camera and the light source controller through a camera power line and a light control power line, respectively, and the light source controller is connected to the camera through an external trigger line; the light source controller is connected with the annular light source through a data line; the camera is connected with a computer through an industrial camera interface, and the computer controls the real-time acquisition and result analysis of the camera.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920323563.2U CN210322833U (en) | 2019-03-14 | 2019-03-14 | Appearance detection device for solar cell |
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| CN201920323563.2U CN210322833U (en) | 2019-03-14 | 2019-03-14 | Appearance detection device for solar cell |
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| CN210322833U true CN210322833U (en) | 2020-04-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946315A (en) * | 2019-03-14 | 2019-06-28 | 镇江苏仪德科技有限公司 | A kind of appearance delection device of solar battery sheet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946315A (en) * | 2019-03-14 | 2019-06-28 | 镇江苏仪德科技有限公司 | A kind of appearance delection device of solar battery sheet |
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| GR01 | Patent grant | ||
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhenjiang yinuoweisi Intelligent Technology Co.,Ltd. Assignor: ZHENJIANG SYD TECHNOLOGY Co.,Ltd. Contract record no.: X2022320000303 Denomination of utility model: An appearance inspection device for solar cells Granted publication date: 20200414 License type: Common License Record date: 20221210 |
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| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Zhenjiang yinuoweisi Intelligent Technology Co.,Ltd. Assignor: ZHENJIANG SYD TECHNOLOGY Co.,Ltd. Contract record no.: X2022320000303 Date of cancellation: 20240116 |