CN117825281A - Photovoltaic detection equipment and detection method of photovoltaic module - Google Patents
Photovoltaic detection equipment and detection method of photovoltaic module Download PDFInfo
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
- H02S50/15—Testing of PV devices, e.g. of PV modules or single PV cells using optical means, e.g. using electroluminescence
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Abstract
The application relates to a photovoltaic detection device and a detection method of a photovoltaic module, wherein the photovoltaic detection device comprises a first detection area and a second detection area, the first detection area is provided with a first support module and a first detection module, and the second detection area is provided with a second support module and a second detection module. And a lifting assembly is arranged between the first detection area and the second detection area and used for transferring the photovoltaic assembly on the first support assembly to the second support assembly. The first detection assembly and the second detection assembly acquire images of different areas of the photovoltaic assembly. Along the direction of height of photovoltaic detection equipment, the interval between second supporting component and the second detection component is greater than the interval between first supporting component and the first detection component, has enlarged the visual field of second detection component, has reduced the image number of the photovoltaic component that the second detection component obtained, and then reduces the number of times of image concatenation, is favorable to reducing photovoltaic component's omission ratio.
Description
Technical Field
The application relates to the technical field of photovoltaic module detection, in particular to a photovoltaic detection device and a detection method of a photovoltaic module.
Background
In the production process of the photovoltaic module, the problems of hidden cracking, welding strip deviation and the like of the battery piece in the photovoltaic module can be solved, related problems can be recorded through camera shooting, and then a worker can identify specific problems in the photovoltaic module through the shot picture. Among the prior art, photovoltaic module passes through the driving roller conveying, has the clearance between the adjacent driving roller, is provided with the detection camera in the driving roller clearance, because the clearance of driving roller is less, divide into 4 detection regions with photovoltaic module along photovoltaic module's length direction, receive the performance restriction of detection camera, along photovoltaic module's width direction, divide into 3 detection regions with photovoltaic module, consequently, photovoltaic module is divided into 12 regional shooting, then splice the picture in different regions, carries out problem identification. Overlapping is generated at the juncture of a plurality of groups of pictures in the picture splicing process, and workers cannot identify whether the photovoltaic module at the overlapping position has a problem or not, so that the possibility of missing detection exists.
Disclosure of Invention
The application provides a photovoltaic detection equipment and a detection method of a photovoltaic module, which are used for reducing the times of picture splicing and further reducing the possibility of missing detection.
The embodiment of the application provides a photovoltaic detection equipment, the photovoltaic detection equipment includes:
The device comprises a first detection area, a second detection area and a first detection module, wherein the first detection area is provided with a first support module and a first detection module, and the first detection module is used for acquiring an image of a photovoltaic module placed on the first support module;
the second detection area is provided with a second supporting component and a second detection component, and the second detection component is used for acquiring an image of the photovoltaic component arranged on the second supporting component;
the distance between the second detection component and the second support component is larger than the distance between the first detection component and the first support component, a lifting component is arranged between the first detection region and the second detection region, and the lifting component can move along the height direction of the photovoltaic detection device and is used for transferring the photovoltaic component from the first support component to the second support component.
In one possible embodiment, the second support assembly includes a mounting bracket, a support frame, and a plurality of hanger rails, each of the support frame and the plurality of hanger rails being mounted to the mounting bracket; along the length direction of photovoltaic check out test set, a plurality of hanger rail interval sets up, is used for supporting photovoltaic module's edge, the support frame is located a plurality of between the hanger rail, and along photovoltaic check out test set's width direction extends, is used for supporting photovoltaic module.
In one possible implementation manner, the second detection assembly includes a first sliding rail and at least two groups of first detection pieces, the first sliding rail is arranged along the length direction of the photovoltaic detection device, and multiple groups of first detection pieces are mounted on the first sliding rail and can move along the first sliding rail.
In one possible embodiment, the first detecting member includes an appearance detecting camera and an infrared detecting camera.
In a possible embodiment, the second detection area is further provided with a third detection assembly, which is located at a side of the second support assembly remote from the second detection assembly.
In one possible embodiment, the first support assembly includes a first transmission member and a second transmission member, the first transmission member and the second transmission member being disposed in spaced relation, and the first detection assembly being located between the first transmission member and the second transmission member. In one possible embodiment, the first detecting assembly includes a second slide rail and a plurality of second detecting members, the second slide rail is disposed between the first conveying member and the second conveying member, and the plurality of second detecting members are mounted on the second slide rail at intervals and are capable of sliding along the second slide rail. In one possible embodiment, the lifting assembly comprises a third conveying member and a third sliding rail, and the photovoltaic assembly is placed on the third conveying member and can move along the conveying direction of the third conveying member; the third sliding rail extends along the height direction of the photovoltaic detection equipment, and the third transmission piece is installed on the third sliding rail.
The embodiment of the application also provides a detection method of the photovoltaic module, which is applied to the photovoltaic detection equipment, wherein the photovoltaic detection equipment comprises a first detection area and a second detection area, the first detection area is provided with a first support module for placing the photovoltaic module, the first detection module is arranged below the first support module and used for acquiring an image of the photovoltaic module placed in the first support module, the second detection area is provided with a second support module for placing the photovoltaic module, and the second detection module is arranged below the second support module and used for acquiring an image of the photovoltaic module placed in the second support module; the second support assembly comprises a support frame, the photovoltaic assembly comprises a first area and a second area, and the support frame can shield the first area; lifting assemblies are respectively arranged on two sides, close to and far away from the first supporting assembly, of the second supporting assembly, the lifting assemblies are respectively a first lifting assembly and a second lifting assembly, a turntable is arranged between the first supporting assembly and the first lifting assembly, and the detection method of the photovoltaic assembly comprises the following steps:
transmitting the photovoltaic module to the first support assembly;
The first detection assembly acquires an image of a first area in the photovoltaic assembly;
judging whether the first area of the photovoltaic module has defects or not according to the image of the first area;
the turntable rotates the photovoltaic module by 90 degrees;
the first lifting assembly transmits the photovoltaic assembly to the second supporting assembly;
the second detection assembly acquires an image of a second region in the photovoltaic assembly;
judging whether the second region of the photovoltaic module has defects according to the image of the second region;
the second lifting assembly transmits the photovoltaic assembly out of the photovoltaic detection device.
In one possible embodiment, a third detecting assembly is disposed on a side of the second supporting assembly away from the second detecting assembly, and when the first lifting assembly transfers the photovoltaic assembly to the second supporting assembly, the detecting method includes:
the third detection assembly acquires an image of one side of the photovoltaic assembly away from the second detection assembly;
judging whether the photovoltaic module has defects or not according to the image acquired by the third detection module.
In one possible embodiment, the second detection component includes at least two appearance detection cameras and at least two infrared detection cameras, and when the second detection component acquires an image of a second area in the photovoltaic component, the detection method includes:
Calling a plurality of infrared detection cameras to acquire EL images of a second area in the photovoltaic module;
splicing a plurality of EL images acquired by the infrared detection cameras;
judging whether a failure position exists in a second area of the photovoltaic module according to the spliced EL image;
invoking a plurality of appearance detection cameras to obtain appearance detection images of a second area in the photovoltaic module;
splicing appearance images acquired by a plurality of appearance detection cameras;
and judging whether a defect position exists in the second area of the photovoltaic module according to the spliced appearance image.
In one possible implementation manner, if the spliced EL image shows that the second area of the photovoltaic module has a failure position, the detection method includes:
invoking the appearance detection camera to obtain an appearance image of a failure position in the photovoltaic module;
and judging whether the failure position has a defect or not according to the appearance image acquired by the appearance detection camera.
In one possible implementation manner, if the spliced appearance image shows that the second area of the photovoltaic module has a defect position, the detection method includes:
adjusting the focal length of the appearance detection camera to obtain a local enlarged view of the defect position;
Judging whether the photovoltaic module has defects according to the local amplification diagram.
The application relates to a photovoltaic detection device and a detection method of a photovoltaic module, wherein the photovoltaic detection device comprises a first detection area and a second detection area, the first detection area is provided with a first support module and a first detection module, and the second detection area is provided with a second support module and a second detection module. And a lifting assembly is arranged between the first detection area and the second detection area and used for transferring the photovoltaic assembly on the first support assembly to the second support assembly. The first detection assembly and the second detection assembly acquire images of different areas of the photovoltaic assembly. Along the direction of height of photovoltaic detection equipment, the interval between second supporting component and the second detection component is greater than the interval between first supporting component and the first detection component, has enlarged the visual field of second detection component, has reduced the image number of the photovoltaic component that the second detection component obtained, and then reduces the number of times of image concatenation, is favorable to reducing photovoltaic component's omission ratio.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
Fig. 1 is a top view of a photovoltaic detection apparatus provided in an embodiment of the present application;
fig. 2 is a top view of a first detection area in a photovoltaic detection apparatus according to an embodiment of the present application;
fig. 3 is a top view of a second detection area in the photovoltaic detection apparatus provided in the embodiments of the present application;
fig. 4 is a side view of a photovoltaic detection apparatus provided in an embodiment of the present application;
fig. 5 is a side view of a first detection area in a photovoltaic detection apparatus provided in an embodiment of the present application;
fig. 6 is a side view of a second detection area in a photovoltaic detection apparatus according to an embodiment of the present application.
Reference numerals:
1-a first detection zone;
11-a first support assembly;
111-a first transfer element;
112-a second transfer element;
12-a first detection component;
121-a second slide rail;
122-a second detection member;
2-a second detection zone;
21-a second support assembly;
211-mounting brackets;
212-supporting frames;
212 a-rolling elements;
213-hanger rail;
214-a roller;
22-a second detection component;
221-a first slide rail;
222-a first detection member;
222 a-an appearance detection camera;
222 b-an infrared detection camera;
23-a third detection assembly;
3-lifting assembly;
31-a third transfer member;
32-a third slide rail;
4-a first lifting assembly;
5-a second lifting assembly;
6-a turntable;
7-transmission device.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Detailed Description
For a better understanding of the technical solutions of the present application, embodiments of the present application are described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
The application provides a photovoltaic detection equipment for detect whether photovoltaic module has quality problem, including the battery piece in the photovoltaic module, this application does not do the restriction to the structure of battery piece, the kind of battery piece includes but is not limited to emitter back passivation battery (Passivated Emitter Rear Cell, PERC), oxide passivation contact battery (Tunnel Oxide Passivated Contact, TOPCon), intrinsic thin film heterojunction battery (Heterojunction with Intrinsic Thin-film, HJT), interdigital back contact battery (Interdigitated Back Contact, IBC), perovskite battery etc..
For the PERC cell, the PERC cell sequentially comprises a front surface metal silver electrode, a front surface silicon nitride passivation layer, a phosphorus layer emitter, a P-type base silicon layer, a local aluminum back field, a metal aluminum back electrode and a back passivation layer (Al 2O 3/SiNx) along the thickness direction of the PERC cell. The PERC battery adopts a passivation film to passivate the back surface, replaces an all-aluminum back surface field, enhances the internal back reflection of light rays on silicon base, reduces the recombination rate of the back surface, and improves the efficiency of the battery by 0.5% -1%.
For the TOPCO battery, the TOPCO battery sequentially comprises a metal silver electrode, a front surface silicon nitride passivation layer, a boron-doped emitter, an N-type base silicon layer, a diffusion doped layer, ultrathin silicon oxide, doped polysilicon, silicon nitride and a metal silver electrode along the thickness direction of the TOPCO battery. The back of the battery consists of a layer of ultrathin silicon oxide (1 nm-2 nm) and a layer of phosphor doped microcrystalline amorphous mixed Si film, which form a passivation contact structure together. The structure can prevent minority carrier hole recombination and improve the open-circuit voltage and short-circuit current of the battery. The ultra-thin oxide layer may allow multi-electron tunneling into the polysilicon layer while blocking minority carrier hole recombination. The excellent passivation effect of the ultrathin silicon oxide and the heavily doped silicon film enables the surface energy band of the silicon wafer to bend, so that a field passivation effect is formed, the probability of electron tunneling is greatly increased, the contact resistance is reduced, the open-circuit voltage and the short-circuit current of the battery are improved, and the conversion efficiency of the battery is improved.
For the HJT battery, the HJT battery sequentially comprises a front low-temperature silver electrode, a front conductive film, an N-type amorphous silicon film, an intrinsic amorphous silicon film, an N-type base silicon layer, an intrinsic amorphous silicon film, a P-type amorphous silicon film, a back conductive film and a back low-temperature silver electrode along the thickness direction of the battery.
For the IBC battery, the IBC battery sequentially comprises a silicon nitride reverse layer, an N+ front surface field, an N-type substrate silicon layer, a P+ emitter, an N+ back field, an aluminum oxide passivation layer, a silicon nitride anti-reflection layer and a metal silver electrode along the thickness direction of the IBC battery. The IBC battery can obtain a P region and an N region which have good uniformity and accurate and controllable junction depth by using an ion implantation technology, the front surface of the battery is not shielded by a grid line, the shading current loss of a metal electrode can be eliminated, the maximum utilization of incident photons is realized, and the short-circuit current can be improved by about 7 percent compared with that of a conventional solar battery; because of the back contact structure, the grid line shielding problem is not needed to be considered, and the grid line proportion can be properly widened, so that the series resistance is reduced and the filling factor is high; the surface passivation and surface trapping structures can be optimally designed to achieve lower front surface recombination rates and surface reflection.
In the case of a perovskite battery, the perovskite battery includes a substrate material, a conductive thin film, an electron transport layer (titanium oxide), a perovskite absorption layer (hole transport layer), and a metal cathode in this order along the thickness direction thereof. The perovskite material has higher light absorption coefficient and longer carrier diffusion distance, photons absorbed by the perovskite material are easily collected by the electrode after being converted into electrons, and the loss is smaller, so that higher photo-generated voltage and current can be generated, and the perovskite shows higher photoelectric conversion efficiency.
In the production or transportation process, hidden cracks, fragments, virtual welding, broken grids and other problems may occur in the photovoltaic module. Therefore, electroluminescence (EL) detection and/or appearance detection of the photovoltaic module are required to determine whether the photovoltaic module has quality problems.
As shown in fig. 1 to 6, the photovoltaic detection provided in the embodiments of the present application is used for EL detection and/or appearance detection of a photovoltaic module. The photovoltaic detection equipment comprises a first detection area 1 and a second detection area 2, the photovoltaic module comprises a first area and a second area, the first detection area 1 is used for acquiring an image in the first area of the photovoltaic module, and the second detection area 2 is used for acquiring an image in the second area. The first detection area 1 is internally provided with a first supporting component 11 and a first detection component 12, the photovoltaic component is arranged on the first supporting component 11, the first detection component 12 is positioned below the first supporting component 11 along the height direction Z of the photovoltaic detection equipment, and an image of a first area in the photovoltaic component can be acquired. The second detection area 2 is internally provided with a second support component 21 and a second detection component 22, the photovoltaic component is placed on the second support component 21, the second detection component 22 is located below the second support component 21 along the height direction Z of the photovoltaic detection equipment, and an image of a second area in the photovoltaic component can be acquired. The spacing between the second support assembly 21 and the second detection assembly 22 is greater than the spacing between the first support assembly 11 and the first detection assembly 12 in the height direction Z of the photovoltaic detection apparatus. A lifting assembly 3 is arranged between the first detection area 1 and the second detection area 2, and the lifting assembly 3 can move along the height direction of the photovoltaic detection equipment and is used for transferring the photovoltaic assembly on the first support assembly 11 to the second support assembly 21.
The first detecting component 12 and the second detecting component 22 are used for acquiring images of different areas of the photovoltaic component, and detecting whether quality problems such as hidden cracks, fragments, cold joints, broken grids and the like exist in the photovoltaic component according to the acquired images. The second detecting component 22 includes a plurality of first detecting elements 222, a second area in the photovoltaic component is located in the fields of view of the plurality of first detecting elements 222, after the plurality of first detecting elements 222 acquire images of a plurality of positions, the images acquired by the plurality of first detecting elements 222 are spliced, and then whether the second area of the photovoltaic component has defects is determined. The second supporting component 21 is used for supporting the photovoltaic component, the distance between the second detecting component 22 and the second supporting component 21 is 250cm to 300cm, particularly can be 250cm, 280cm, 300cm and the like, compared with the existing detecting equipment of the photovoltaic component, the distance between the photovoltaic component and the second detecting component 22 is increased, the visual field of the second detecting component 22 is enlarged, the second detecting component 22 can acquire a larger range of images in the photovoltaic component, the number of times of splicing the images of the photovoltaic component is reduced, the possibility of overlapping, skewing and other problems at the joint position during splicing of the images is further reduced, the accuracy of the images of the photovoltaic component is improved, and the leak detection rate of the photovoltaic component is reduced. Because the area of the photovoltaic module is larger, the supporting frame 212 is arranged in the second supporting component 21, so that the possibility that the photovoltaic module bends in the second detection area 2 is reduced. The support frame 212 can cause shielding to the photovoltaic module, and its shielding area is the first region of the photovoltaic module, leads to the second detection component 22 can't acquire the image of the first region in the photovoltaic module, and photovoltaic detection equipment includes first detection region 1, makes the image of the first region in the photovoltaic module can be obtained by first detection component 12, makes the first region in the photovoltaic module and the second region homoenergetic be detected, is favorable to reducing the possibility that the photovoltaic module detected the omission.
As shown in fig. 2 and 5, in one possible embodiment, the first support assembly 11 includes first and second transport members 111 and 112 disposed in spaced apart relation, with a gap disposed between the first and second transport members 111 and 112, and a first region of the photovoltaic assembly is aligned with the gap between the first and second transport members 111 and 112 when the photovoltaic assembly is placed on the first support assembly 11. The first detection assembly 12 is also located between the first transport 111 and the second transport 112, enabling it to acquire images of the first region of the photovoltaic assembly.
The transmission directions of the first transmission piece 111 and the second transmission piece 112 are both directed to the second detection area 2, the photovoltaic module is transmitted to the first detection area 1 through the first transmission piece 111, then the first transmission piece 111 drives the photovoltaic module to move along the transmission direction of the photovoltaic module, the photovoltaic module moves to the second transmission piece 112, a gap is reserved between the first transmission piece 111 and the second transmission piece 112, and when the photovoltaic module is transported by the first transmission piece 111 and the second transmission piece 112, the first area of the photovoltaic module can be exposed to the first detection module 12 through the gap, so that the first detection module 12 can acquire an image of the first area of the photovoltaic module. After the first detection component 12 acquires the image of the first region of the photovoltaic component, the first transmission component 111 and the second transmission component 112 can transmit the photovoltaic component to the lifting component 3 between the first detection region 1 and the second detection region 2, so that the photovoltaic detection device can perform the next detection on the photovoltaic component.
As shown in fig. 2 and 5, in one possible embodiment, the first detecting assembly 12 includes a second slide rail 121 and a plurality of second detecting members 122, the second slide rail 121 is disposed between the first and second conveying members 111 and 112 and extends in a width direction Y of the photovoltaic detecting apparatus, and the plurality of second detecting members 122 are mounted on the second slide rail 121 and are movable along the second slide rail 121 to adjust a space between adjacent second detecting members 122.
In the first detection area 1, the distance between the first supporting component 11 and the first detecting component 12 is smaller, the distance between the first detecting component 12 and the first supporting component 11 is smaller and can be 80cm to 100cm, particularly 80cm, 90cm, 100cm and the like, the resolution of the single second detecting component 122 can be four megapixels to five megapixels, the photovoltaic component is placed on the first supporting component 11, therefore, the distance between the photovoltaic component and the first detecting component 12 is smaller, the visual field of the single second detecting component 122 is smaller, the first detecting component 12 comprises a plurality of second detecting components 122, and the visual field superposition of the plurality of second detecting components 122 can cover the first area of the photovoltaic component, so that the first detecting component 12 can acquire the image of the first area of the photovoltaic component. The photovoltaic detection apparatus may be used for detecting photovoltaic modules with different sizes, so that the size and the position of the first area of the photovoltaic module may change, and the plurality of second detection pieces 122 may adjust positions along the second sliding rail 121, so as to improve the application range of the photovoltaic detection apparatus.
In one possible embodiment, the second detecting member 122 may be a line scan camera, when the photovoltaic module is located on the first supporting member 11, in the process of transferring the photovoltaic module between the first conveying member 111 and the second conveying member 112, the first area of the photovoltaic module may pass through the field of view of the first detecting member 12, the plurality of second detecting members 122 in the first detecting member 12 may scan and obtain the image of the first area of the photovoltaic module, and when the first detecting member 12 obtains the image of the first area of the photovoltaic module, the first conveying member 111 and the second conveying member 112 need not to be paused, so as to improve the detection efficiency of the photovoltaic detection device.
As shown in fig. 3 and 6, the second supporting assembly 21 includes a mounting bracket 211, a supporting bracket 212, and a plurality of hanger rails 213, and both the supporting bracket 212 and the hanger rails 213 are mounted to the mounting bracket 211. The plurality of hanging rails 213 are arranged at intervals along the length direction X of the photovoltaic detection equipment, the hanging rails 213 are arranged at one end far away from the mounting bracket 211, the edges of the photovoltaic modules are abutted against the idler wheels 214, so that the hanging rails 213 can support the photovoltaic modules, and meanwhile the photovoltaic modules can move on the hanging rails 213 so as to transfer the photovoltaic modules to the second detection area 2. The support frame 212 is located between a plurality of hanger rails 213 to extend along photovoltaic detection equipment's width direction Y, and photovoltaic module can move to support frame 212 top in the in-process of hanger rail 213 motion, and with support frame 212 contact, photovoltaic module's intermediate position can with support frame 212 butt. The area where the support frame 212 is abutted with the photovoltaic module is provided with a rolling piece 212a, and the rolling piece 212a can roll relative to the support frame 212, so that the photovoltaic module can conveniently move relative to the support frame. Along the length direction X of the photovoltaic detection apparatus, the plurality of first detection pieces 222 in the second detection assembly 22 are respectively located at two sides of the support frame 212, so as to obtain images of second areas of the photovoltaic assembly respectively located at two sides of the support frame 212.
The photovoltaic module is transported to the hanger rail 213 through the lifting module 3, the distance between the photovoltaic module and the second detection module 22 can be increased, the visual field of the second detection module 22 is enlarged, the frequency of image splicing of the second area of the photovoltaic module is reduced, and the accuracy of detection of the photovoltaic module is improved. Be provided with the support frame 212 that extends along photovoltaic check out test set's width direction Y on installing support 211, can support photovoltaic module length direction's central point put, photovoltaic module's size is great, and support frame 212 can reduce photovoltaic module and take place the possibility of buckling on support frame 212, has reduced photovoltaic module's the possibility of damage in the testing process. The second detecting element 22 is located below the supporting frame 212, the supporting frame 212 can block a first area of the photovoltaic element, and a second area of the photovoltaic element can be exposed in a field of view of the detecting element 221 in the second detecting element 22, so that the second detecting element 22 can acquire an image of the second area of the photovoltaic element.
In one possible embodiment, the hanger rail 213 further includes a driving member coupled to the roller 214 for driving the roller 214 in rotation, such that the hanger rail 213 is capable of driving the photovoltaic module in the second region.
As shown in fig. 3 and 6, in one possible embodiment, the second detection assembly 22 includes a first rail 221 and at least two first detection members 222. The first slide rail 221 extends along a length direction X of the photovoltaic detection apparatus, and a plurality of first detection pieces 222 are mounted to the first slide rail 221 and are movable along the first slide rail 221.
The first detecting piece 222 is used for acquiring images of different positions in the second area of the photovoltaic module, and as the photovoltaic detecting equipment can detect the photovoltaic modules of different sizes, the first detecting piece 222 is movably arranged on the first sliding rail 221, and the position of the first detecting piece 222 in the second detecting area 2 can be adjusted, so that the images of the second area of the photovoltaic module can be acquired conveniently, and the application range of the photovoltaic detecting equipment can be improved.
The first detecting piece 222 includes an appearance detecting camera 222a and an infrared detecting camera 222b, where the appearance detecting camera 222a is used to obtain an appearance image of the photovoltaic module, so that the photovoltaic detecting device can perform appearance detection on the photovoltaic module; the infrared detection camera 222b is used for acquiring an EL image of the photovoltaic module, so that the photovoltaic detection device can perform EL detection on the photovoltaic module.
In the second detection area 2, the photovoltaic module is disposed on the second support module 21, the distance between the second detection module 22 and the second support module 21 is larger, if the resolution of the appearance detection camera 222a in the first detection module 222 is lower, the resolution of the image of the second area in the photovoltaic module acquired by the second detection module 22 is reduced, if the defect in the second area of the photovoltaic module is smaller, the possibility of missed detection is easy to occur, so that the first detection module 222 comprises the appearance detection camera 222a with 8k resolution, which is about 7680x4320 pixels, thereby improving the resolution of the image acquired by the second detection module 22 and being beneficial to reducing the possibility of missed detection.
In one possible embodiment, a power supply component is disposed in the second detection area 2, and is connected to the photovoltaic component when the photovoltaic component is transported to the second detection area, and when the photovoltaic component is subjected to EL detection by the photovoltaic detection device, the power supply component supplies power to the photovoltaic component, and the reverse process of the photovoltaic effect is utilized, so that the electron and hole recombination process inside the battery piece in the photovoltaic component emits photons and releases energy, and electroluminescence is performed, so that the infrared detection camera 222b can acquire the EL image of the photovoltaic component.
As shown in fig. 6, in a possible embodiment the second detection zone 2 is further provided with a third detection assembly 23. The third detecting assembly 23 is located on the side of the second supporting assembly 21 remote from the second detecting assembly 22 along the height direction Z of the photovoltaic detecting apparatus. The lifting assembly 3 between the second detection area 2 and the first detection area 1 is a first lifting assembly 4, and the third detection assembly 23 is installed at one end, close to the first lifting assembly 4, of the second detection area 2 along the length direction X of the photovoltaic detection device.
The third detection component 23 is a line scanning camera, the photovoltaic component is transmitted to the second detection region 2 through the first lifting component 4, the photovoltaic component can pass through the third detection component 23 in the process of moving to the second detection region 2, and the third detection component 23 can scan one side of the photovoltaic component far away from the second detection component 22 so as to acquire an image of one side of the photovoltaic component far away from the second detection component 22.
As shown in fig. 1 and 4, in one possible embodiment, a turntable 6 is provided on the side of the first detection zone 1 adjacent to the second detection zone 2 for turning the photovoltaic module by 90 °. When the photovoltaic module is transmitted to the photovoltaic detection equipment, the short side of the photovoltaic module is parallel to the transmission direction of the first support module 11, and the first transmission piece 111 and the second transmission piece 112 in the first detection area 1 transmit the photovoltaic module to the turntable 6, and the turntable 6 rotates by 90 degrees, so that the long side of the photovoltaic module is parallel to the transmission direction of the first support module 11.
The plurality of first detecting pieces 222 in the second detecting area 2 are arranged at intervals along the length direction X of the photovoltaic detecting equipment, the turntable 6 rotates the photovoltaic module by 90 degrees, the long side of the photovoltaic module is parallel to the transmission direction of the first supporting module 11, the transmission direction of the first supporting module 11 is also the length direction X of the photovoltaic detecting equipment, and the plurality of first detecting pieces 222 can acquire images of different positions of the photovoltaic module conveniently.
As shown in fig. 1 and 4, the lifting assembly 3 is also provided as a second lifting assembly 5 on the side of the second detection area 2 away from the first detection area 1, and the turntable 6 is also provided on the side of the second lifting assembly 5 away from the second detection area 2. The turntable 6 is used for rotating the photovoltaic module by 90 degrees, so that the photovoltaic module rotates to an initial position, and the photovoltaic module is convenient to process in the subsequent process.
A transmission device 7 is arranged between the turntable 6 and the first lifting assembly 4, and the photovoltaic assembly is transmitted into the first lifting assembly 4 through the transmission device 7 after rotating and then is transmitted into the second detection area 2 through the lifting assembly 3.
As shown in fig. 1 and 4, in one possible embodiment, the lifting assembly 3 includes a third conveying member 31 and a third slide rail 32, the third slide rail 32 extending along a height direction Z of the photovoltaic detection apparatus, the third conveying member 31 being mounted to the third slide rail 32 and being movable along the third slide rail 32. The transmission direction of the third transmission member 31 coincides with the transmission directions of the first transmission member 111 and the second transmission member 112 for transmitting the photovoltaic module.
The lifting assembly 3 between the second detection area 2 and the first detection area 1 is a first lifting assembly 4, the transmission device 7 transmits the photovoltaic assembly to the third transmission piece 31 of the first lifting assembly 4, when the photovoltaic assembly is completely located on the third transmission piece 31 of the first lifting assembly 4, the third transmission piece 31 of the first lifting assembly 4 moves to the height of the second supporting assembly 21 along the third sliding rail 32 of the first lifting assembly 4, and then the photovoltaic assembly is transmitted to the second supporting assembly 21 through the third transmission piece 31 of the first lifting assembly 4.
As shown in fig. 1 and 4, in one possible embodiment, the lifting assembly 3 is also disposed on a side of the second detection area 2 away from the first detection area 1, and is the second lifting assembly 5, after the second detection assembly 22 acquires the image of the second area in the photovoltaic assembly, the photovoltaic assembly is transferred onto the third transfer member 31 of the second lifting assembly 5, and the third transfer member 31 of the second lifting assembly 5 moves down along the sliding rail 32 of the second lifting assembly 5 to align with the outlet of the photovoltaic detection device, and then the third transfer member 31 of the second lifting assembly 5 can transfer the photovoltaic assembly out of the photovoltaic detection device.
In one possible embodiment, when the photovoltaic module moves to the second supporting module 21 and the first area of the photovoltaic module is blocked by the supporting frame 212, the areas except the first area and the second area of the photovoltaic module may be located on the third transmission member 31 of the first lifting module 4 and/or the third transmission member 31 of the second lifting module 5, the second area of the photovoltaic module may be located in the field of view of the second detecting module 22 through the third transmission member 31 of the first lifting module 4 and/or the third transmission member 31 of the second lifting module 5, and after the second detecting module 22 acquires the image of the second area of the photovoltaic module, the third transmission member 31 of the first lifting module 4 and/or the third transmission member 31 of the second lifting module 5 may drive the photovoltaic module to move along the transmission direction of the third transmission member 31, so that the photovoltaic module moves to the third transmission member 31 of the second lifting module 5, and then the second area of the photovoltaic module may be located in the field of view of the second detecting module 22, and the second area of the photovoltaic module may be located in the field of view of the second detecting module 22.
In one possible embodiment, the photovoltaic module is disengaged from the first lift assembly 4 and is not in contact with the second lift assembly 5 when the photovoltaic module is moved to the second support assembly 21 and the first region of the photovoltaic module is obscured by the support frame 212. The photovoltaic module moves to a direction approaching to the second lifting module 5 through the roller 214 connected with the driving piece in the hanging rail 213, so that the photovoltaic module can move to the third transmission piece 31 of the second lifting module 5.
The embodiment of the application also provides a detection method of the photovoltaic module, which is applied to the photovoltaic detection equipment. The detection method of the photovoltaic module comprises the following steps:
s1, transmitting a photovoltaic module to a first supporting module 11;
s2, the first detection component 12 acquires an image of a first area in the photovoltaic component;
s3, judging whether the first area of the photovoltaic module has defects or not according to the image of the first area;
s4, rotating the photovoltaic module by 90 degrees by the rotary table 6;
s5, the first lifting assembly 4 transmits the photovoltaic assembly to the second supporting assembly 21;
s6, the second detection assembly 22 acquires an image of a second area in the photovoltaic assembly;
s7, judging whether the second area of the photovoltaic module has defects according to the image of the second area;
s8, the second lifting assembly 5 transmits the photovoltaic assembly to the photovoltaic detection equipment. In the second detection area 2, the first area of the photovoltaic module is shielded by the support frame 212, so that the second detection module 22 cannot acquire the image of the second area, and before the second detection module 22 acquires the image of the second area in the photovoltaic module, the first detection module 12 acquires the image of the first area, and whether the first area of the photovoltaic module has defects or not is judged through the image of the first area, so that the possibility of missed detection of the photovoltaic module can be reduced. When first lifting assembly 4 transmits photovoltaic module to second supporting component 21, photovoltaic module moves along the direction of height Z of photovoltaic detection equipment to improve the interval between photovoltaic module and the second detecting component 22, can enlarge the visual field of second detecting component 22, first detecting piece 222 required when the image of the second region of photovoltaic module is obtained has been reduced, and then the number of times of the image concatenation of the second region of photovoltaic module has been reduced, be favorable to improving the detection precision of photovoltaic module, reduce the number of times of photovoltaic module image concatenation, and then reduce the possibility of leaking to examine.
In one possible embodiment, the first detecting assembly 12 includes a second slide 121 and a plurality of second detecting members 122, and before the photovoltaic assembly is transferred to the first supporting assembly 11, the detecting method includes:
s11, adjusting the plurality of second detection pieces 122 to preset positions along the second sliding rail 121.
The second detecting element 122 is used for acquiring an image of a first area in the photovoltaic module, the photovoltaic detecting device can be used for detecting photovoltaic modules of various sizes, the positions and the sizes of the first areas in the photovoltaic modules of different sizes are different, before the photovoltaic modules are transmitted to the first supporting module 11, the second detecting element 122 is adjusted to a preset position, so that the fields of view of the second detecting elements 122 are aligned with the first area of the photovoltaic modules, and the first detecting module 12 can acquire the image of the first area of the photovoltaic modules conveniently.
In one possible embodiment, the first support assembly 11 comprises a first transport 111 and a second transport 112, and when the turret 6 rotates the photovoltaic assembly by 90 °, the detection method comprises:
s41, the first conveying piece 111 and/or the second conveying piece 112 drive the photovoltaic module to move to the turntable 6;
s42, rotating the rotary table 6 by 90 degrees;
s43, the turntable 6 drives the photovoltaic module to move to the transmission device 7.
When the photovoltaic module is located on the first supporting module 11, the short side of the photovoltaic module is parallel to the transmission direction of the first supporting module 11, and the photovoltaic module is rotated by 90 degrees through the turntable 6, so that the long side of the photovoltaic module is parallel to the transmission direction of the first supporting module 11. The transmission direction of the first supporting component 11 is the length direction X of the photovoltaic detection device, and the plurality of first detection pieces 222 in the second detecting component 22 are arranged at intervals along the length direction X of the photovoltaic detection device, so that the second detecting component 22 can conveniently acquire the image of the photovoltaic component.
In one possible embodiment, the first lifting assembly 4 comprises a third transfer member 31, and the detection method comprises, while the first lifting assembly 4 transfers the photovoltaic assembly to the second support assembly 21:
s51, driving the photovoltaic module to move to the first lifting module 4 by the transmission device 7;
s52, the first lifting assembly 4 moves to a preset height along the height direction of the photovoltaic detection equipment;
and S53, the third transmission piece 31 drives the photovoltaic assembly to move to the second supporting assembly 21.
After the first detection component 12 acquires the image of the first area in the photovoltaic component, the first transmission component 111 and the second transmission component 112 drive the photovoltaic component to move towards the direction close to the first lifting component 4, so that the photovoltaic component is separated from the first transmission component 111 and the second transmission component 112 in sequence and moves to the first lifting component 4, and the first lifting component 4 is convenient to drive the photovoltaic component to move along the height direction of the photovoltaic detection equipment. When the first lifting assembly 4 moves to a preset height along the height direction of the photovoltaic detection device, the photovoltaic assembly is aligned with the second supporting assembly 21, the third transmission piece 31 in the first lifting assembly 4 can drive the photovoltaic assembly to move to the second supporting assembly 21, and the second region of the photovoltaic assembly avoids the supporting frame 212 in the second supporting assembly 21, so that the second detection assembly 22 can acquire images of the second region of the photovoltaic assembly conveniently.
In a possible embodiment, a third detection assembly 23 is provided on the side of the second support assembly 21 remote from the second detection assembly 22. While the first lift assembly 4 transfers the photovoltaic assembly to the second support assembly 21, the detection method includes:
s54, the third detection assembly 23 acquires an image of one side of the photovoltaic assembly away from the second detection assembly 22;
and S55, judging whether the photovoltaic module has defects according to the image acquired by the third detection module 23.
The first detection component 12 and the second detection component 22 are both used for acquiring images of the same side of the photovoltaic component, and the third detection component 23 can acquire images of the other side of the photovoltaic component, so that both sides of the photovoltaic component can be detected, and the possibility of missed detection of the photovoltaic component can be reduced.
In one possible embodiment, the first detecting element 222 includes at least two appearance detecting cameras 222a and at least two infrared detecting cameras 222b, and the EL image of the photovoltaic module can be obtained by the infrared detecting cameras 222b to determine whether the photovoltaic module has problems of hidden cracks, fragments, cold joints, broken grids, and the like. The appearance image of the photovoltaic module is obtained through the appearance detection camera 222a, so as to further judge whether the photovoltaic module has the problems of hidden cracks, fragments, virtual soldering, broken grids and the like. When the second detection component 22 acquires an image of the second region in the photovoltaic component, the detection method includes:
S61, calling a plurality of infrared detection cameras 222b to acquire an EL image of a second area in the photovoltaic module;
s62, splicing the EL images acquired by the infrared detection cameras 222 b;
s63, judging whether a failure position exists in a second area of the photovoltaic module according to the spliced EL image;
s64, calling a plurality of appearance detection cameras 222a to obtain appearance detection images of a second area in the photovoltaic module;
s65, splicing the appearance images acquired by the appearance detection cameras 222 a;
and S66, judging whether a defect position exists in the second area of the photovoltaic module according to the spliced appearance image.
The infrared detection camera 222b is called to perform EL detection on the photovoltaic module to obtain an EL image of a second area of the photovoltaic module, and then the appearance detection camera 222a is called to perform appearance detection on the photovoltaic module to obtain an appearance image of the second area of the photovoltaic module, so that the accuracy of identifying problems such as hidden cracks, fragments, rosin joint and broken grids in the photovoltaic module can be improved by combining the EL image and the appearance image, and the possibility of misjudgment is reduced.
If the spliced EL image shows that the failure position exists in the second area of the photovoltaic module, the detection method comprises the following steps:
s631, calling an appearance detection camera 222a to acquire an appearance image of a failure position in the photovoltaic module;
S632, judging whether the failure position has a defect according to the appearance image acquired by the appearance detection camera 222 a.
The EL image of the photovoltaic module is a black and white image, and there may be quality problems in the photovoltaic module in displaying the position where there is failure. Appearance detection camera 222a detects the appearance of the photovoltaic module, and can obtain a colorful appearance image, and compare the colorful appearance image with the EL image to further confirm whether the quality problem exists in the photovoltaic module, so that the accuracy of identifying whether the quality problem exists in the photovoltaic module is improved.
If the spliced appearance image shows that the second area of the photovoltaic module has a defect position, the detection method comprises the following steps:
s661, adjusting the focal length of the appearance detection camera 222a, and obtaining a partial enlarged view of the defect position;
s662, judging whether the photovoltaic module has defects according to the partial enlarged graph.
In the process of appearance detection of the photovoltaic module, if the appearance image obtained by the appearance detection camera 222a shows that the photovoltaic module has a defective position, a local enlarged view of the position where the defect is detected is obtained by adjusting the focal length of the appearance detection camera 222a, so that secondary detection of the defective position is facilitated, the detection precision of the photovoltaic module is improved, and the possibility of misjudgment in the detection process of the photovoltaic module is reduced.
The embodiment of the application provides a photovoltaic detection device and a detection method of a photovoltaic module, wherein the photovoltaic detection device comprises a first detection area 1 and a second detection area 2, the first detection area 1 is provided with a first support module 11 and a first detection module 12, and the second detection area 2 is provided with a second support module 21 and a second detection module 22. A lifting assembly 3 is arranged between the first detection zone 1 and the second detection zone 2 for transferring the photovoltaic modules on the first support assembly 11 to the second support assembly 21. The first and second detection assemblies 12, 22 acquire images of different regions of the photovoltaic assembly. Along the direction Z of the height of the photovoltaic detection device, the distance between the second support component 21 and the second detection component 22 is larger than the distance between the first support component 11 and the first detection component 12, the view field of the second detection component 22 is enlarged, the number of the images of the photovoltaic components acquired by the second detection component 22 is reduced, the frequency of image splicing is further reduced, and the omission ratio of the photovoltaic components is reduced.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (13)
1. A photovoltaic detection apparatus, characterized in that it comprises:
a first detection area (1), wherein the first detection area (1) is provided with a first supporting component (11) and a first detection component (12), and the first detection component (12) is used for acquiring an image of a photovoltaic component placed on the first supporting component (11);
a second detection area (2), wherein the second detection area (2) is provided with a second supporting component (21) and a second detection component (22), and the second detection component (22) is used for acquiring an image of a photovoltaic component placed on the second supporting component (21);
the distance between the second detection component (22) and the second support component (21) is larger than the distance between the first detection component (12) and the first support component (11), a lifting component (3) is arranged between the first detection region (1) and the second detection region (2), and the lifting component (3) can move along the height direction of the photovoltaic detection device and is used for transferring the photovoltaic component from the first support component (11) to the second support component (21).
2. The photovoltaic detection apparatus according to claim 1, wherein the second support assembly (21) comprises a mounting bracket (211), a support frame (212) and a plurality of hanger rails (213), the support frame (212) and the plurality of hanger rails (213) each being mounted to the mounting bracket (211); along the length direction of photovoltaic check out test set, a plurality of hanger rail (213) interval sets up, is used for supporting photovoltaic module's edge, support frame (212) are located a plurality of between hanger rail (213), and follow photovoltaic check out test set's width direction extends, is used for supporting photovoltaic module.
3. The photovoltaic detection apparatus according to claim 1, wherein the second detection assembly (22) comprises a first slide rail (221) and at least two sets of first detection members (222), the first slide rail (221) being arranged along a length direction of the photovoltaic detection apparatus, the plurality of sets of first detection members (222) being mounted to the first slide rail (221) and being movable along the first slide rail (221).
4. A photovoltaic detection device according to claim 3, characterized in that the first detection element (222) comprises an appearance detection camera (222 a) and an infrared detection camera (222 b).
5. The photovoltaic detection apparatus according to claim 1, characterized in that the second detection zone (2) is further provided with a third detection assembly (23), the third detection assembly (23) being located on a side of the second support assembly (21) remote from the second detection assembly (22).
6. The photovoltaic detection apparatus according to claim 1, characterized in that the first support assembly (11) comprises a first transmission member (111) and a second transmission member (112), the first transmission member (111) and the second transmission member (112) being arranged at intervals, the first detection assembly (12) being located between the first transmission member (111) and the second transmission member (112).
7. The photovoltaic detection apparatus according to claim 6, wherein the first detection assembly (12) comprises a second slide rail (121) and a plurality of second detection members (122), the second slide rail (121) being disposed between the first transmission member (111) and the second transmission member (112), the plurality of second detection members (122) being mounted at intervals to the second slide rail (121) and being capable of sliding along the second slide rail (121).
8. The photovoltaic detection apparatus according to claim 1, characterized in that the lifting assembly (3) comprises a third transport (31) and a third slide rail (32), the photovoltaic assembly being placed on the third transport (31) and being movable in the transport direction of the third transport (31); the third sliding rail (32) extends along the height direction of the photovoltaic detection equipment, and the third transmission piece (31) is installed on the third sliding rail (32).
9. The detection method of the photovoltaic module is applied to the photovoltaic detection equipment, the photovoltaic detection equipment comprises a first detection area and a second detection area, the first detection area is provided with a first support module used for placing the photovoltaic module, the first detection module is arranged below the first support module and used for acquiring an image of the photovoltaic module placed in the first support module, the second detection area is provided with a second support module used for placing the photovoltaic module, and the second detection module is arranged below the second support module and used for acquiring an image of the photovoltaic module placed in the second support module; the second support assembly comprises a support frame, the photovoltaic assembly comprises a first area and a second area, and the support frame can shield the first area; lifting assemblies are arranged on two sides, close to and far away from the first supporting assembly, of the second supporting assembly, the lifting assemblies are respectively a first lifting assembly and a second lifting assembly, a turntable is arranged between the first supporting assembly and the first lifting assembly, and the detection method of the photovoltaic assembly comprises the following steps:
-transferring the photovoltaic module to the first support assembly (11);
The first detection assembly (12) acquires an image of a first area in the photovoltaic assembly;
judging whether the first area of the photovoltaic module has defects or not according to the image of the first area;
the turntable (6) rotates the photovoltaic module by 90 degrees;
the first lifting assembly (4) transmits the photovoltaic assembly to the second supporting assembly (21);
the second detection assembly (22) acquires an image of a second region in the photovoltaic assembly;
judging whether the second region of the photovoltaic module has defects according to the image of the second region;
the second lifting assembly (5) transmits the photovoltaic assembly out of the photovoltaic detection equipment.
10. The method of detecting a photovoltaic module according to claim 9, characterized in that a third detecting module (23) is provided on a side of the second supporting module (21) remote from the second detecting module (22), and in that the first lifting module (4) transfers the photovoltaic module to the second supporting module (21), the method of detecting comprises:
the third detection assembly (23) acquires an image of one side of the photovoltaic assembly away from the second detection assembly (22);
And judging whether the photovoltaic module has defects according to the image acquired by the third detection module (23).
11. The method of inspection of a photovoltaic module according to claim 9, wherein the second inspection module (22) comprises at least two appearance inspection cameras (222 a) and at least two infrared inspection cameras (222 b), and wherein when the second inspection module (22) acquires an image of a second area in the photovoltaic module, the method of inspection comprises:
invoking a plurality of infrared detection cameras (222 b) to acquire EL images of a second area in the photovoltaic module;
stitching the EL images acquired by the plurality of infrared detection cameras (222 b);
judging whether a failure position exists in a second area of the photovoltaic module according to the spliced EL image;
invoking a plurality of appearance detection cameras (222 a) to obtain appearance detection images of a second area in the photovoltaic module;
stitching appearance images acquired by a plurality of the appearance detection cameras (222 a);
and judging whether a defect position exists in the second area of the photovoltaic module according to the spliced appearance image.
12. The method for detecting a photovoltaic module according to claim 11, wherein if the spliced EL image shows that the second area of the photovoltaic module has a failure position, the method comprises:
Invoking the appearance detection camera (222 a) to acquire an appearance image of a failure position in the photovoltaic module;
and judging whether the failure position has a defect or not according to the appearance image acquired by the appearance detection camera (222 a).
13. The method for detecting a photovoltaic module according to claim 11, wherein if the spliced appearance image shows that the second area of the photovoltaic module has a defect position, the method comprises:
adjusting a focal length of the appearance detection camera (222 a) to obtain a partial enlarged view of the defect position;
judging whether the photovoltaic module has defects according to the local amplification diagram.
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