CN117760969A - Photovoltaic module surface detection system and photovoltaic module surface detection method - Google Patents

Photovoltaic module surface detection system and photovoltaic module surface detection method Download PDF

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Publication number
CN117760969A
CN117760969A CN202311849920.6A CN202311849920A CN117760969A CN 117760969 A CN117760969 A CN 117760969A CN 202311849920 A CN202311849920 A CN 202311849920A CN 117760969 A CN117760969 A CN 117760969A
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China
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photovoltaic module
detection
light source
image acquisition
acquisition device
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Inventor
孙长振
夏靖辉
何晨旭
徐伟智
张自强
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Chint New Energy Technology Co Ltd
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Chint New Energy Technology Co Ltd
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Priority to CN202311849920.6A priority Critical patent/CN117760969A/en
Publication of CN117760969A publication Critical patent/CN117760969A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

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Abstract

The invention provides a photovoltaic module surface detection system and a photovoltaic module surface detection method. The photovoltaic module surface detection system includes: a conveying device; the first detection device comprises a first light source, a second light source and an image acquisition device, wherein the first light source is used for providing diffuse reflection light rays for the photovoltaic module, and the second light source is used for providing linear light rays for the photovoltaic module; the image acquisition device is used for acquiring an image of the photovoltaic module irradiated by the first light source and/or the second light source; the first detection device is provided with a first detection mode and a second detection mode, and when the first detection device is in the first detection mode, the first light source is put into use for detecting the color difference value of each battery piece on the photovoltaic module; when the first detection device is in the second detection mode, at least part of the second light source is used for detecting whether the scratch defect exists on the photovoltaic module. The invention solves the problem that the appearance quality of the photovoltaic module is evaluated by manual visual inspection in the prior art to influence the evaluation accuracy.

Description

Photovoltaic module surface detection system and photovoltaic module surface detection method
Technical Field
The invention relates to the technical field of photovoltaic modules, in particular to a photovoltaic module surface detection system and a photovoltaic module surface detection method.
Background
At present, along with popularization of building photovoltaics, photovoltaic modules are gradually expanded to roof and wall-standing distributed power stations by being applied to large-scale ground power stations. In order to eliminate light pollution, the building photovoltaic is more harmonious and attractive, and the photovoltaic module needs to have aesthetic feeling while considering the power generation efficiency.
However, the photovoltaic module in the prior art is affected by the appearance chromatic aberration of the solar battery and the coated glass, obvious color difference and surface scratches are generated between the modules and in different areas inside the modules, the appearance of the photovoltaic module is seriously affected, the experience of customers is affected, and the application of photovoltaic and building photovoltaic is not facilitated.
In order to solve the technical problems, the appearance quality of the photovoltaic module is mainly evaluated and controlled by manual online visual inspection, but human eyes are easy to fatigue on one hand, and are interfered by various factors, such as light, mental state and the like, and the situation of inaccurate color separation can often occur; on the other hand, manual detection is time-consuming and labor-consuming, and meanwhile, unqualified products are extremely easy to flow out to cause customer complaints.
Disclosure of Invention
The invention mainly aims to provide a photovoltaic module surface detection system and a photovoltaic module surface detection method, which are used for solving the problems that in the prior art, the appearance quality of a photovoltaic module is evaluated in a manual visual inspection mode, the evaluation accuracy is affected, and the labor intensity of staff is increased.
In order to achieve the above object, according to one aspect of the present invention, there is provided a photovoltaic module surface inspection system comprising: the conveying device is used for conveying the photovoltaic module; the first detection device is positioned above the conveying device and comprises a first light source, a second light source and an image acquisition device, wherein the first light source is used for providing diffuse reflection light rays for the photovoltaic module, and the second light source is used for providing linear light rays for the photovoltaic module; the image acquisition device is used for acquiring an image of the photovoltaic module irradiated by the first light source and/or the second light source; the first detection device is provided with a first detection mode and a second detection mode, and when the first detection device is in the first detection mode, the first light source is put into use for detecting the color difference value of each battery piece on the photovoltaic module; when the first detection device is in the second detection mode, at least part of the second light source is put into use for detecting whether scratch defects exist on the photovoltaic module.
Further, the first detection device further comprises a cover body, the inner surface of the cover body is a diffuse reflection surface, and the first light source is arranged on the diffuse reflection surface and the light emitting direction of the first light source is upward; the second light source is arranged on the diffuse reflection surface, the light emitting direction of the second light source faces the photovoltaic assembly and forms an included angle with the photovoltaic assembly, and the first light source and the second light source can be selectively put into use; the image acquisition device is movably arranged on the cover body.
Further, the diffuse reflection surface is a spherical surface, and when the first detection device is in the first detection mode, the image acquisition device is positioned above the first light source and at the spherical top point of the spherical surface.
Further, the diffuse reflection surface is a spherical surface, and the second light source is arranged at intervals with the spherical top of the spherical surface; when the first detection device is in the second detection mode, the image acquisition device is provided with a first position S1 and a second position S2, and the first position S1 and the second position S2 are respectively positioned at two sides of the second light source, so that whether the scratch defect exists on the photovoltaic module is judged according to the image acquisition respectively acquired by the image acquisition device at the first position S1 and the second position S2.
Further, the first light source is located the opening part of the cover body, and the first light source is a plurality of, and a plurality of first light sources are arranged along the circumference interval of opening.
Further, the photovoltaic module surface detection system further includes: the first driving device is in driving connection with the image acquisition device to drive the image acquisition device to move among the spherical vertex of the spherical surface, the first position S1 and the second position S2.
Further, the photovoltaic module surface detection system further includes: the image acquisition device is movably arranged on the guide structure so as to move along the extending direction of the guide structure; the guide structure is an arc-shaped plate, and the center axis of the arc-shaped plate passes through the center of the sphere.
Further, the photovoltaic module surface detection system further includes: the second detection device is arranged above the conveying device and is arranged at intervals with the first detection device, so as to be used for detecting the color difference value in a preset area on the photovoltaic module.
Further, the second detection device includes: the supporting structure is movably erected on the conveying device; the plurality of colorimeters are arranged on the supporting structure and are arranged at intervals along a preset direction forming an included angle with the conveying direction of the conveying device; wherein, the scanning end of each colorimeter faces the conveying device and forms an included angle with the conveying direction.
According to another aspect of the present invention, there is provided a surface detection method of a photovoltaic module, which is applicable to the surface detection system of a photovoltaic module, and the surface detection method of a photovoltaic module includes: the battery piece color difference detection method comprises the following steps: placing a photovoltaic module on a conveying device of a photovoltaic module surface detection system, controlling a first detection device of the photovoltaic module surface detection system to be in a first detection mode, and acquiring color difference values of all battery pieces by an image acquisition device of the photovoltaic module surface detection system; the color difference detection method in the preset area of the photovoltaic module comprises the following steps: conveying the photovoltaic module to the position of a second detection device of the surface detection system of the photovoltaic module, wherein the second detection device is used for detecting a color difference value in a preset area on the photovoltaic module; the scratch defect detection method comprises the following steps: the method comprises the steps of placing the photovoltaic module on a conveying device, controlling a first detection device to be in a second detection mode and controlling an image acquisition device to acquire images at a first position S1 and a second position S2 respectively, and judging whether scratch defects exist on the photovoltaic module according to the images acquired by the image acquisition device at the first position S1 and the second position S2 respectively.
Further, in the battery piece color difference detection method, after the image acquisition device acquires the color difference value of each battery piece, the color difference value of each battery piece is compared with a first preset color difference parameter to obtain a color difference detection result of each battery piece.
Further, in the color difference detection method in the preset area of the photovoltaic module, a photovoltaic module model formed by the photovoltaic module is led into a control module, and the preset area is marked in the photovoltaic module model; after the second detection device detects the color difference value in the preset area on the photovoltaic module, comparing the color difference value in the preset area with a second preset color difference parameter, and marking a part exceeding the second preset color difference parameter in the preset area in the photovoltaic module model.
Further, in the scratch defect detection method, the method for judging whether the scratch defect exists on the photovoltaic module according to the image acquired by the image acquisition device at the first position S1 and the second position S2 respectively comprises the following steps: acquiring RGB values of a plurality of pixel points of a first image acquired by an image acquisition device at a first position S1 and RGB values of a plurality of pixel points of a second image acquired by the image acquisition device at a second position S2, and judging that scratch defects exist at the same position of the first image and the second image if the RGB values of n continuous pixel points at the same position differ by more than 30 percent; wherein n is more than or equal to 50.
By applying the technical scheme, the surface detection system of the photovoltaic module comprises a conveying device, a first detection device and a second detection device, wherein the conveying device is used for conveying the photovoltaic module, the first detection device is positioned above the conveying device and comprises a first light source, a second light source and an image acquisition device, the first light source is used for providing diffuse reflection light rays for the photovoltaic module, and the second light source is used for providing linear light rays for the photovoltaic module; the image acquisition device is used for acquiring an image of the photovoltaic module irradiated by the first light source and/or the second light source. In this way, the first detection device is provided with a first detection mode in which the first light source is put into operation and a second detection mode in which at least part of the second light source is put into operation, and the first detection device is used for detecting the color difference value of each battery piece on the photovoltaic module when the first detection device is in the first detection mode; when the first detection device is in the second detection mode, the first detection device is used for detecting whether scratch defects exist on the photovoltaic module.
Compared with the prior art that the appearance quality of the photovoltaic module is estimated by using an artificial visual inspection mode, the photovoltaic module surface detection system in the application uses the first detection device to replace the artificial visual inspection mode to estimate and control the appearance quality of the photovoltaic module, so that the problems that the appearance quality of the photovoltaic module is estimated by the artificial visual inspection mode in the prior art to influence the estimation accuracy and increase the labor intensity of workers are solved, the estimation accuracy of the appearance quality is improved, the labor intensity of the workers is also reduced, and the estimation time consumption is shortened.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic structural diagram of an embodiment of a photovoltaic module surface inspection system according to the present invention;
FIG. 2 shows a perspective view of the photovoltaic module surface inspection system of FIG. 1;
FIG. 3 shows a schematic structural view of the photovoltaic module of FIG. 1;
fig. 4 shows a flow chart of an embodiment of a method of surface inspection of a photovoltaic module according to the present invention.
Wherein the above figures include the following reference numerals:
10. a conveying device; 20. a photovoltaic module; 21. a battery sheet; 30. a cover body; 31. a diffuse reflection surface; 40. a first light source; 50. a second light source; 60. an image acquisition device; 70. a second detection device; 71. a support structure; 72. a colorimeter; 80. a first driving device; 90. a guide structure; 100. and presetting an area.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present invention.
In order to solve the problems that in the prior art, the appearance quality of a photovoltaic module is evaluated in a manual visual inspection mode to influence the evaluation accuracy and increase the labor intensity of workers, the application provides a photovoltaic module surface detection system and a photovoltaic module surface detection method.
As shown in fig. 1 to 3, the photovoltaic module surface inspection system includes a conveying device 10, a first inspection device, and a second inspection device 70. The conveyor 10 is used for conveying the photovoltaic modules 20. The first detection device is located above the conveying device 10, and comprises a first light source 40, a second light source 50 and an image acquisition device 60, wherein the first light source 40 is used for providing diffuse reflection light to the photovoltaic module 20, and the second light source 50 is used for providing linear light to the photovoltaic module 20; the image acquisition device 60 is used for acquiring an image of the photovoltaic module 20 irradiated by the first light source 40 and/or the second light source 50. The first detection device has a first detection mode and a second detection mode, and when the first detection device is in the first detection mode, the first light source 40 is put into use for detecting a color difference value of each battery piece 21 on the photovoltaic module 20; at least a portion of the second light source 50 is put into use when the first detection device is in the second detection mode for detecting whether a scratch defect is present on the photovoltaic module 20.
By applying the technical scheme of the embodiment, the first detection device has a first detection mode in which the first light source 40 is put into use and a second detection mode in which at least part of the second light source 50 is put into use, and when the first detection device is in the first detection mode, the first detection device is used for detecting the color difference value of each battery piece 21 on the photovoltaic module 20; the first detection device is configured to detect whether a scratch defect exists on the photovoltaic module 20 when the first detection device is in the second detection mode.
Compared with the prior art that the appearance quality of the photovoltaic module is estimated by using an artificial visual inspection mode, the photovoltaic module surface detection system in the embodiment uses the first detection device to replace the artificial visual inspection mode to estimate and control the appearance quality of the photovoltaic module, so that the problems that the estimation accuracy is affected, the labor intensity of staff is increased, the estimation accuracy of the appearance quality is improved, the labor intensity of the staff is reduced, and the estimation time is shortened in the prior art by estimating the appearance quality of the photovoltaic module in the artificial visual inspection mode are solved.
As shown in fig. 1, the first detection device further includes a cover 30, the inner surface of the cover 30 is a diffuse reflection surface 31, and the first light source 40 is disposed on the diffuse reflection surface 31 and has an upward light emitting direction; the second light source 50 is arranged on the diffuse reflection surface 31, the light emitting direction of the second light source faces the photovoltaic module 20 and forms an included angle with the photovoltaic module 20, and the first light source 40 and the second light source 50 can be selectively put into use; the image capture device 60 is movably disposed on the housing 30. In this way, the arrangement described above ensures that the first light source 40 is capable of providing diffuse reflected light and the second light source 50 is capable of providing linear light to the photovoltaic module 20.
Alternatively, the image capture device 60 is an industrial camera.
In the present embodiment, the diffuse reflection surface 31 is a spherical surface, and the image capturing device 60 is located above the first light source 40 and at the spherical vertex of the spherical surface when the first detecting device is in the first detecting mode. Like this, the sphere top of sphere is located the highest department, installs the highest position department at the cover body 30 with image acquisition device 60 to ensure that the colour difference condition of all battery piece 21 on the photovoltaic module 20 can all be gathered by image acquisition device 60, promoted the colour difference detection efficiency of each battery piece 21 on the photovoltaic module 20 of photovoltaic module surface detection system on the one hand, on the other hand can reduce the use quantity of image acquisition device 60, and then reduced the processing cost of photovoltaic module surface detection system.
Specifically, when the photovoltaic module 20 is conveyed below the cover 30 by the conveying device 10, the cover 30 completely covers the photovoltaic module 20, the first light source 40 emits light upward to make light on the diffuse reflection surface 31 to simulate a natural light environment, the front appearance of the photovoltaic module 20 is photographed under the simulated natural light environment, and then the collected image is guided into the color difference analysis system to perform color difference detection on each battery piece 21 in the photovoltaic module 20 and is compared with a first preset color difference parameter to obtain the color difference reject ratio between the battery pieces 21 in the photovoltaic module 20.
In the present embodiment, the second light source 50 is disposed at an interval from the spherical vertex of the spherical surface; when the first detecting device is in the second detecting mode, the image capturing device 60 has a first position S1 and a second position S2, and the first position S1 and the second position S2 are respectively located at two sides of the second light source 50, so as to determine whether the scratch defect exists on the photovoltaic module 20 according to the image captured by the image capturing device 60 at the first position S1 and the second position S2. Specifically, if scratches exist on the surface of the photovoltaic module 20, because the scratches generally have a certain included angle with the surface of the photovoltaic module 20, for the light rays injected at a fixed angle, in the images acquired from different angles, the light rays reflected by the scratches are different, which causes different brightness on the images, so that the scratches can be identified.
Specifically, the first light source 40 is turned off, the second light source 50 is turned on, and the image acquisition device 60 is operated to move between the first position S1 and the second position S2 to acquire two images at different positions. Then, the image data is transmitted through a control module connected with the image acquisition device 60, and the image data is analyzed in an image analysis system of the control module to obtain the comparison condition of two images of the photovoltaic module 20, and if the brightness difference of local pixels in the two images of a certain area on the obtained image is too large, the position is judged to have scratch defects.
Optionally, the first light sources 40 are located at the opening of the cover 30, and a plurality of first light sources 40 are arranged at intervals along the circumferential direction of the opening. Like this, the irradiation direction of a plurality of first light sources is unanimous upwards to through above-mentioned setting simulation outdoor environment light intensity, with the assurance image acquisition device 60 clearly of shooing, and then promoted the colour difference judgement precision of each battery piece 21 on the photovoltaic module 20, the colour difference judgement precision in the region 100 of predetermineeing.
Alternatively, the first light source 40 is constituted by a plurality of white LED strings/parallel, or other light sources.
Alternatively, a plurality of first light sources 40 are provided at the opening at uniform intervals.
As shown in fig. 1, the photovoltaic module surface inspection system further includes a first driving device 80. The first driving device 80 is in driving connection with the image capturing device 60 to drive the image capturing device 60 to move among the spherical vertex of the spherical surface, the first position S1 and the second position S2. In this way, the first driving device 80 drives the image acquisition device 60 to move on the cover body 30, so that the intelligent degree of the surface detection system of the photovoltaic module is improved, the operation difficulty of staff is reduced, and the automatic movement of the image acquisition device 60 is realized.
Alternatively, the first drive means 80 is a motor.
As shown in fig. 1, the photovoltaic module surface inspection system further includes a guide structure 90. The guide structure 90 is disposed on the housing 30, and the image capture device 60 is movably disposed on the guide structure 90 to move in the extending direction of the guide structure 90. The guiding structure 90 is an arc-shaped plate, and the center axis of the arc-shaped plate passes through the center of the sphere. In this way, in the process that the first driving device 80 drives the image acquisition device 60 to move, the guiding structure 90 guides and guides the image acquisition device 60, so as to ensure that the image acquisition device 60 moves in a preset track, further avoid that the image acquisition device deviates from the preset track to influence the normal use of the photovoltaic module surface detection system, and also promote the motion stability of the image acquisition device 60.
Specifically, the guide structure 90 has a first through hole, and the extending direction of the first through hole coincides with the extending direction of the guide structure 90. The cover 30 has a second through hole communicated with the first through hole, the second through hole is consistent with the extending direction of the first through hole, the first driving device 80 is arranged in the first through hole in a penetrating manner and can slide along the first through hole, the image acquisition device 60 is arranged on the first driving device 80 and is arranged in the second through hole in a penetrating manner so as to slide along the second through hole, and the image acquisition end of the image acquisition device 60 extends into the cover 30.
Optionally, a first sealing structure is disposed in the first through hole to prevent light leakage at the first through hole.
Optionally, a second sealing structure is disposed at the second through hole to prevent light leakage at the second through hole.
As shown in fig. 1, the photovoltaic module surface inspection system further includes a second inspection device 70. The second detecting device 70 is located above the conveying device 10 and is spaced from the first detecting device, so as to detect a color difference value in a preset area 100 on the photovoltaic module 20. Specifically, the second detecting device 70 is configured to detect a color difference value in a preset area 100 on the photovoltaic module 20, so as to detect the color difference value of each cell 21 of the photovoltaic module 20, the color difference value in the preset area 100, and whether a scratch defect exists by the first detecting device and the second detecting device 70.
Compared with the prior art that the appearance quality of the photovoltaic module is estimated by using an artificial visual inspection mode, the photovoltaic module surface detection system in the embodiment uses the first detection device and the second detection device 70 to replace the artificial visual inspection mode to estimate and control the appearance quality of the photovoltaic module, so that the problems that the estimation accuracy is affected and the labor intensity of staff is increased due to the fact that the appearance quality of the photovoltaic module is estimated by using the artificial visual inspection mode in the prior art are solved, the estimation accuracy of the appearance quality is improved, the labor intensity of the staff is also reduced, and the estimation time is shortened.
In the present embodiment, the second detection device 70 is located downstream of the first detection device.
As shown in fig. 1 and 2, the second detection device 70 includes a support structure 71 and a plurality of colorimeters 72. The support structure 71 is movably mounted on the conveyor 10. The plurality of colorimeters 72 are all disposed on the supporting structure 71 and are disposed at intervals along a predetermined direction that forms an angle with the conveying direction of the conveying device 10. The scanning end of each colorimeter 72 faces the conveying device 10 and forms an included angle with the conveying direction. Alternatively, the scanning ends of the respective colorimeters 72 are disposed perpendicular to the conveying direction. In this way, each colorimeter 72 is arranged on the supporting structure 71, on one hand, all colorimeters 72 can be driven to move up and down or horizontally relative to the conveying device 10 by the supporting structure 71 so as to adjust the collection distance and the collection position of the colorimeters 72; on the other hand, the appearance cleanliness of the second detection device 70 is improved, the color gauges 72 are convenient to replace and assemble and disassemble, and the operation difficulty of staff is reduced.
Specifically, the second detecting device 70 is configured to detect a chromaticity value at a specific position of the photovoltaic module 20, transmit the tested chromaticity value data to the control module, statistically analyze basic color types and distributions and chromaticity average values of the corresponding types by the control module, and compare the result with a set standard value, thereby obtaining a color difference reject ratio at the specific position. The colorimeter 72 is electrically connected with the control module, the colorimeter 72 detects parameters such as a relevant chromaticity L, A, B value in the preset area 100 and inputs the parameters into the control module for data analysis and processing, and when the data detected by the colorimeter 72 exceeds a preset alarm line, a display screen of the control module marks the position.
Optionally, the second detecting device 70 further includes a second driving device connected to the supporting structure 71 to drive the supporting structure 71 to move toward or away from the conveying device 10, so as to adjust the distance between the scanning end of the colorimeter 72 and the photovoltaic module 20.
Optionally, the number of colorimeters 72 is greater than or equal to 3.
Optionally, the conveyor 10 includes a conveyor belt and an optical displacement sensor for detecting a specific position of the photovoltaic module 20 on the conveyor belt to control the first or second detection device to be put into use.
As shown in fig. 4, the present application further provides a method for detecting a surface of a photovoltaic module, which is applicable to the above-mentioned system for detecting a surface of a photovoltaic module, and the method for detecting a surface of a photovoltaic module includes:
the battery piece color difference detection method comprises the following steps: placing a photovoltaic module on a conveying device of a photovoltaic module surface detection system, controlling a first detection device of the photovoltaic module surface detection system to be in a first detection mode, and acquiring color difference values of all battery pieces by an image acquisition device of the photovoltaic module surface detection system;
the color difference detection method in the preset area of the photovoltaic module comprises the following steps: conveying the photovoltaic module to the position of a second detection device of the surface detection system of the photovoltaic module, wherein the second detection device is used for detecting a color difference value in a preset area on the photovoltaic module;
the scratch defect detection method comprises the following steps: the method comprises the steps of placing the photovoltaic module on a conveying device, controlling a first detection device to be in a second detection mode and controlling an image acquisition device to acquire images at a first position S1 and a second position S2 respectively, and judging whether scratch defects exist on the photovoltaic module according to the images acquired by the image acquisition device at the first position S1 and the second position S2 respectively.
By applying the technical scheme of the embodiment, the first detection device is provided with a first detection mode in which the first light source is used and a second detection mode in which the second light source is used, and the first detection device is used for detecting the color difference value of each battery piece on the photovoltaic module when the first detection device is in the first detection mode; when the first detection device is in the second detection mode, the first detection device is used for detecting whether scratch defects exist on the photovoltaic module, and the second detection device is used for detecting color difference values in a preset area on the photovoltaic module, so that the color difference values of all battery pieces of the photovoltaic module, the color difference values in the preset area and whether the scratch defects exist are detected through the first detection device and the second detection device.
Compared with the prior art that the appearance quality of the photovoltaic module is estimated by using an artificial visual inspection mode, the photovoltaic module surface detection system in the embodiment uses the first detection device and the second detection device to replace the artificial visual inspection mode to estimate and control the appearance quality of the photovoltaic module, so that the problems that the appearance quality of the photovoltaic module is estimated by the artificial visual inspection mode in the prior art to influence the estimation accuracy and increase the labor intensity of workers are solved, the estimation accuracy of the appearance quality is improved, the labor intensity of the workers is also reduced, and the estimation time is shortened.
In this embodiment, the method for detecting the surface of the photovoltaic module includes a method for detecting the color difference of the battery pieces, a method for detecting the color difference of each battery piece in a preset area of the photovoltaic module, and a method for detecting the scratch defect, wherein the method for detecting the color difference of each battery piece in the preset area of the photovoltaic module is used for detecting the color difference of each battery piece in the preset area of the photovoltaic module, and the method for detecting the scratch defect is used for detecting whether the scratch defect exists in the photovoltaic module.
In this embodiment, in the method for detecting chromatic aberration of battery pieces, after the image collecting device collects chromatic aberration values of each battery piece, the chromatic aberration values of each battery piece are compared with a first preset chromatic aberration parameter to obtain a chromatic aberration detection result of each battery piece.
Specifically, the front of the finished photovoltaic module is upwards placed on the conveying device, the photovoltaic module firstly enters the first detection device, the first light source is turned on, meanwhile, the image acquisition device shoots the photovoltaic module under the first light source, the image is transmitted into the control module for color difference analysis, the control module outputs a color difference analysis result, and the color difference condition of each battery piece is displayed.
In the method for detecting chromatic aberration in the preset area of the photovoltaic module, a photovoltaic module model formed by the photovoltaic module is led into a control module, and the preset area is marked in the photovoltaic module model; after the second detection device detects the color difference value in the preset area on the photovoltaic module, comparing the color difference value in the preset area with a second preset color difference parameter, and marking a part exceeding the second preset color difference parameter in the preset area in the photovoltaic module model.
Specifically, after the battery piece color difference detection method is completed, the photovoltaic module is conveyed into a second detection device, the colorimeter detects color difference values of a preset area on the photovoltaic module, and the control module performs data analysis to display the color difference condition of the preset area.
In this embodiment, in the scratch defect detection method, the method for determining whether a scratch defect exists on a photovoltaic module according to image acquisition acquired by an image acquisition device at a first position S1 and a second position S2 respectively includes:
acquiring RGB values of a plurality of pixel points of a first image acquired by an image acquisition device at a first position S1 and RGB values of a plurality of pixel points of a second image acquired by the image acquisition device at a second position S2, and judging that scratch defects exist at the same position of the first image and the second image if the RGB values of n continuous pixel points at the same position differ by more than 30 percent; wherein n is more than or equal to 50.
Note that continuous means that there is no space between the pixel points.
Specifically, the conveying device resets and retransmits the photovoltaic module, simultaneously, the first light source is turned off, the second light source is turned on, the first driving device drives the image acquisition device to move between the first position S1 and the first position S2, two images are acquired, data analysis is carried out through the control module, and scratch detection is carried out.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the photovoltaic module surface detection system comprises a conveying device, a first detection device and a second detection device, wherein the conveying device is used for conveying the photovoltaic module, the first detection device is positioned above the conveying device and comprises a first light source, a second light source and an image acquisition device, the first light source is used for providing diffuse reflection light rays for the photovoltaic module, and the second light source is used for providing linear light rays for the photovoltaic module; the image acquisition device is used for acquiring an image of the photovoltaic module irradiated by the first light source and/or the second light source. In this way, the first detection device is provided with a first detection mode in which the first light source is put into operation and a second detection mode in which at least part of the second light source is put into operation, and the first detection device is used for detecting the color difference value of each battery piece on the photovoltaic module when the first detection device is in the first detection mode; when the first detection device is in the second detection mode, the first detection device is used for detecting whether scratch defects exist on the photovoltaic module.
Compared with the prior art that the appearance quality of the photovoltaic module is estimated by using an artificial visual inspection mode, the photovoltaic module surface detection system in the application uses the first detection device to replace the artificial visual inspection mode to estimate and control the appearance quality of the photovoltaic module, so that the problems that the appearance quality of the photovoltaic module is estimated by the artificial visual inspection mode in the prior art to influence the estimation accuracy and increase the labor intensity of workers are solved, the estimation accuracy of the appearance quality is improved, the labor intensity of the workers is also reduced, and the estimation time consumption is shortened.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A photovoltaic module surface inspection system, comprising:
a conveying device (10) for conveying the photovoltaic modules (20);
the first detection device is positioned above the conveying device (10) and comprises a first light source (40), a second light source (50) and an image acquisition device (60), wherein the first light source (40) is used for providing diffuse reflection light rays for the photovoltaic module (20), and the second light source (50) is used for providing linear light rays for the photovoltaic module (20); the image acquisition device (60) is used for acquiring an image of the photovoltaic module (20) irradiated by the first light source (40) and/or the second light source (50);
wherein the first detection device has a first detection mode and a second detection mode, and when the first detection device is in the first detection mode, the first light source (40) is put into use for detecting a color difference value of each cell (21) on the photovoltaic module (20); at least part of the second light source (50) is put into use for detecting whether a scratch defect is present on the photovoltaic module (20) while the first detection means is in the second detection mode.
2. The photovoltaic module surface detection system according to claim 1, wherein the first detection device further comprises a cover body (30), the inner surface of the cover body (30) is a diffuse reflection surface (31), and the first light source (40) is arranged on the diffuse reflection surface (31) and the light emitting direction of the first light source is upward; the second light source (50) is arranged on the diffuse reflection surface (31) and has a light emitting direction facing the photovoltaic module (20) and an included angle with the photovoltaic module (20), and the first light source (40) and the second light source (50) can be selectively put into use; the image acquisition device (60) is movably arranged on the cover body (30).
3. The photovoltaic module surface detection system according to claim 2, characterized in that the diffuse reflecting surface (31) is a sphere, and the image acquisition device (60) is located above the first light source (40) and at a sphere vertex of the sphere when the first detection device is in the first detection mode.
4. The photovoltaic module surface detection system according to claim 2, characterized in that the diffuse reflection surface (31) is a spherical surface, and the second light source (50) is disposed at a distance from a spherical vertex of the spherical surface; when the first detection device is in the second detection mode, the image acquisition device (60) is provided with a first position S1 and a second position S2, and the first position S1 and the second position S2 are respectively positioned at two sides of the second light source (50) so as to judge whether scratch defects exist on the photovoltaic module (20) according to the image acquired by the image acquisition device (60) at the first position S1 and the second position S2 respectively.
5. The photovoltaic module surface detection system according to claim 2, wherein the first light source (40) is located at an opening of the cover body (30), the first light source (40) is a plurality of the first light sources, and the plurality of the first light sources (40) are arranged at intervals along a circumferential direction of the opening.
6. The photovoltaic module surface inspection system of claim 4, further comprising:
the first driving device (80) is in driving connection with the image acquisition device (60) so as to drive the image acquisition device (60) to move among the spherical vertex of the spherical surface, the first position S1 and the second position S2.
7. The photovoltaic module surface inspection system of claim 3 or 4, further comprising:
a guide structure (90) disposed on the cover (30), the image acquisition device (60) being movably disposed on the guide structure (90) to move in an extending direction of the guide structure (90);
the guide structure (90) is an arc-shaped plate, and the center axis of the arc-shaped plate passes through the center of the spherical surface.
8. The photovoltaic module surface inspection system of claim 1, further comprising:
the second detection device (70) is arranged above the conveying device (10) and is spaced from the first detection device, so as to be used for detecting the color difference value in a preset area (100) on the photovoltaic module (20).
9. The photovoltaic module surface inspection system of claim 8, wherein the second inspection device (70) comprises:
a support structure (71) movably mounted on the conveyor (10);
the colorimeters (72) are arranged on the supporting structure (71) and are arranged at intervals along a preset direction forming an included angle with the conveying direction of the conveying device (10);
the scanning end of each colorimeter (72) faces the conveying device (10) and forms an included angle with the conveying direction.
10. A photovoltaic module surface inspection method, characterized in that it is applied to the photovoltaic module surface inspection system according to any one of claims 1 to 9, and the photovoltaic module surface inspection method comprises:
the battery piece color difference detection method comprises the following steps: placing a photovoltaic module on a conveying device of a photovoltaic module surface detection system, controlling a first detection device of the photovoltaic module surface detection system to be in a first detection mode, and acquiring a color difference value of each battery piece by an image acquisition device of the photovoltaic module surface detection system;
the color difference detection method in the preset area of the photovoltaic module comprises the following steps: conveying the photovoltaic module to the position of a second detection device of the surface detection system of the photovoltaic module, wherein the second detection device is used for detecting a color difference value in a preset area on the photovoltaic module;
the scratch defect detection method comprises the following steps: and placing the photovoltaic module on the conveying device, controlling the first detection device to be in a second detection mode and controlling the image acquisition device to acquire images at a first position S1 and a second position S2 respectively, so as to judge whether scratch defects exist on the photovoltaic module according to the images acquired by the image acquisition device at the first position S1 and the second position S2 respectively.
11. The method for detecting the surface of the photovoltaic module according to claim 10, wherein in the method for detecting the chromatic aberration of the battery piece, after the image acquisition device acquires the chromatic aberration value of each battery piece, the chromatic aberration value of each battery piece is compared with a first preset chromatic aberration parameter to obtain a chromatic aberration detection result of each battery piece.
12. The method according to claim 10, wherein in the method for detecting chromatic aberration in the preset area of the photovoltaic module, a photovoltaic module model formed by the photovoltaic module is introduced into a control module, and the preset area is marked in the photovoltaic module model; after the second detection device detects the color difference value in the preset area on the photovoltaic module, comparing the color difference value in the preset area with a second preset color difference parameter, and marking the part exceeding the second preset color difference parameter in the preset area in the photovoltaic module model.
13. The method according to claim 10, wherein in the scratch defect detection method, the method for judging whether the scratch defect exists on the photovoltaic module according to the image acquired by the image acquisition device at the first position S1 and the second position S2 respectively comprises:
acquiring RGB values of a plurality of pixels of a first image acquired by the image acquisition device at the first position S1 and RGB values of a plurality of pixels of a second image acquired by the image acquisition device at the second position S2, and judging that scratch defects exist at the same position of the first image and the second image if the RGB values of n continuous pixels at the same position of the first image and the second image differ by more than 30%; wherein n is more than or equal to 50.
CN202311849920.6A 2023-12-28 2023-12-28 Photovoltaic module surface detection system and photovoltaic module surface detection method Pending CN117760969A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117969418A (en) * 2024-03-30 2024-05-03 江苏格林保尔光伏有限公司 Color difference identification equipment and method for Top-Con monocrystalline silicon battery piece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117969418A (en) * 2024-03-30 2024-05-03 江苏格林保尔光伏有限公司 Color difference identification equipment and method for Top-Con monocrystalline silicon battery piece

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