Photovoltaic module defect detection equipment

Abstract

The present application discloses a photovoltaic module defect detection device, comprising a detection system, a support system, and a drive system; the detection system is arranged on the support system and reciprocates along the support system under the drive of the drive system; the detection system comprises a fuselage, a plurality of image acquisition devices spaced apart on the fuselage, a light source assembly for providing light to the image acquisition devices, and a central controller; the support system comprises a first walking beam and a second walking beam arranged in parallel; the drive system comprises an upper walking device and a lower walking device arranged near both ends of the support system, a first position detection device is provided on the first walking beam, and a second position detection device is provided on the second walking beam, and the first position detection device and the second position detection device are arranged at opposite ends to detect the extreme positions of the detection system along the two ends of the support system. The position detection device is provided to ensure the safety of the detection system, and the detection system is suspended above the photovoltaic module to prevent the photovoltaic module from suffering secondary damage during detection.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power station detection, and in particular to a photovoltaic module defect detection device. Background Art

[0002] Photovoltaic module defect detection is fundamental and crucial for the operation and maintenance of photovoltaic power plants. Many existing methods for detecting hidden cracks in photovoltaic power plants rely on contact methods, such as EL testing, which requires disassembling the photovoltaic modules for testing. This wastes manpower, reduces power generation efficiency, and carries the risk of secondary damage to the modules. A more advanced method utilizes tracked inspection vehicles, but these vehicles must be designed to meet the national standard for operating pressure on photovoltaic modules, which is less than 5400 Pa. This requirement increases equipment cost and significantly limits its structural design, making it less cost-effective for power plants. Therefore, a low-cost, high-performance photovoltaic module defect detection device is needed. Summary of the Invention

[0003] In response to the above technical problems, the present application provides a new type of photovoltaic module defect detection equipment that meets the requirements of high-precision detection effects and low manufacturing costs.

[0004] To solve the above technical problems, the present application provides a photovoltaic module defect detection device for defect detection of photovoltaic modules in different power stations, including a detection system, a support system and a drive system; the detection system is arranged on the support system and reciprocates along the support system under the drive of the drive system; the detection system includes a fuselage, a plurality of image acquisition devices arranged at intervals on the fuselage, a light source assembly for providing light source for the image acquisition device, and a central controller, the image acquisition device and the light source assembly are respectively connected to the central controller by signal, the support system includes a first walking beam and a second walking beam arranged in parallel; the drive system includes an upper walking device and a lower walking device arranged near the two ends of the support system, the upper walking device and the lower walking device move along the frame of the photovoltaic power station according to a preset program, a first position detection device is provided on the first walking beam, and a second position detection device is provided on the second walking beam, and the first position detection device and the second position detection device are arranged at opposite ends to detect the extreme positions of the detection system walking along the two ends of the support system.

[0005] Furthermore, a detachable battery assembly is provided at one end of the support system and above the drive system, and a traction member is provided on the fuselage; both ends of the traction member are fixedly provided on a traction mechanism, and the traction mechanism is provided near both ends of the support system.

[0006] Furthermore, both the upper walking device and the lower walking device are provided with sensor components for position detection.

[0007] Furthermore, the first walking beam and the second walking beam are both assembled by two support beams, a smooth and continuous slope is formed between the starting end and the end end of the support beam, the slope is set to 1°~3°, and the support beams are assembled and fixed by a connecting component assembly.

[0008] Furthermore, a reinforcement assembly is provided between the first walking beam and the second walking beam; the upper walking device includes a first gear assembly and a first drive motor that drives the first gear assembly to rotate; the lower walking device includes a second gear assembly and a second drive motor that drives the second gear assembly to rotate; the upper walking device is provided with upper walking wheels that walk along the frame of the photovoltaic power station and a first pressure wheel that walks along the side wall of the frame of the photovoltaic power station; the lower walking device is provided with lower walking wheels that walk along the frame of the photovoltaic power station and a second pressure wheel that walks along the side wall of the frame of the photovoltaic power station.

[0009] Furthermore, the body includes a frame and a shell arranged on the frame, the frame is composed of parallel cantilever beams and connecting plates assembled with the cantilever beams, the shell includes a first shell, a second shell and a third shell assembled from top to bottom, and the light source assembly is assembled on the connecting plate through an assembly plate and is located above the third shell.

[0010] Furthermore, the first shell and the second shell are hollow structures, the first shell is provided with an inlet fan and an outlet fan opposite to the inlet fan, a bracket assembled with the connecting plate is provided between the suspension beams, and the multiple image acquisition devices are arranged at intervals on the bracket.

[0011] Furthermore, the first position detection device and the second position detection device are detection contact switches, and the detection contact switches are connected to the central controller.

[0012] Furthermore, the connector assembly includes a support plate, a first assembly block, a second assembly block and a fastener; the first assembly block and the second assembly block are placed in the support beam, and the fastener is used to assemble and fix the support plate, the first assembly block and the second assembly block to the support beam.

[0013] Furthermore, the fuselage is provided with a walking wheel assembly that can roll along the first walking beam and the second walking beam, and the walking wheel assembly includes an assembly seat and horizontal wheels and vertical wheels arranged on the assembly seat; the assembly seat is assembled to the fuselage through a fixing member.

[0014] Compared with the prior art, the present application has the following beneficial effects: by arranging a position detection device on the support system, the present application can ensure the safety of the detection system when it moves back and forth on the support system. At the same time, the support system suspends the detection system above the photovoltaic component to avoid direct contact between the detection system and the photovoltaic component, thereby protecting the photovoltaic component from secondary damage during the detection process, thereby ensuring the reliability of the detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a three-dimensional assembly of a photovoltaic module defect detection device according to an exemplary embodiment;

[0016] Figure 2 is a schematic diagram of the three-dimensional assembly of a support system and a drive system of an exemplary embodiment;

[0017] Figure 3 is a partially assembled schematic diagram of an exemplary embodiment detection system;

[0018] Figure 4 is a partially assembled schematic diagram of a drive system of an exemplary embodiment;

[0019] Figure 5 is a schematic cross-sectional view of an exemplary embodiment of an assembly of a connector assembly and a support beam;

[0020] Figure 6 It is a perspective schematic diagram of a first connecting plate of an exemplary embodiment.

[0021] Figure Number:

[0022] Photovoltaic module defect detection equipment 100,

[0023] Detection system 1, fuselage 10, suspension beam 11,

[0024] First connecting plate 12, base 121, wing 122,

[0025] Holding portion 123, second connecting plate 13, first shell 14,

[0026] Inlet fan 140, outlet fan 141, second housing 15,

[0027] The third shell 16, the first reinforcing rib 151, the second reinforcing rib 152

[0028] Assembly plate 17, bracket 18, oblique support 181,

[0029] Support system 2, first walking beam 21, second walking beam 22,

[0030] Support beam 23, first receiving groove 230, second receiving groove 231,

[0031] Guide groove 232, connector assembly 24, support plate 241,

[0032] First assembly block 242, second assembly block 243, fastener 244,

[0033] First position detection device 245, second position detection device 246, reinforcement component 25,

[0034] Reinforcement plate 251, locking member 252, travel wheel assembly 26,

[0035] Assembly seat 260, horizontal wheel 261, vertical wheel 262,

[0036] Drive system 3, upper walking device 30, upper walking wheel 301,

[0037] First pressing wheel 302, driving motor 303, main gear 311,

[0038] First gear assembly 31, first bevel gear 312, second bevel gear 313,

[0039] The third bevel gear 314, the fourth bevel gear 315, the chain 316,

[0040] Lower walking device 32, lower walking wheel 321, second pressing wheel 322,

[0041] The first traction mechanism 33, the second traction mechanism 34, the traction member 35,

[0042] Sensor assembly 36, detection wheel 361, travel switch 362,

[0043] Battery assembly 4, first fastener 41, second fastener 42,

[0044] Image acquisition device 5, light source assembly 6, central controller 7. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is sought, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0047] In addition, it should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0048] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "the" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically limited. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0049] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0050] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0051] Please refer to Figures 1 to 6 As shown, the present application provides a photovoltaic module defect detection device 100 for defect detection of photovoltaic modules in various power plants. The detection device comprises a detection system 1, a support system 2, and a drive system 3. The detection system 1 is mounted on the support system 2 and reciprocates along the support system 2 under the drive system 3. The detection system 1 comprises a body 10, a plurality of image acquisition devices 5 spaced apart on the body 10, a light source assembly 6 for providing light to the image acquisition devices 5, a central controller 7, and a traction member 35 mounted on the body 10. The support system 2 includes a first walking beam 21 and a second walking beam 22 arranged in parallel; the drive system 3 includes an upper walking device 30 and a lower walking device 32 arranged near the two ends of the support system 2, and the two ends of the traction member 35 are fixedly arranged on the traction mechanism, and the traction mechanism is arranged near the two ends of the support system 2. The upper walking device 30 and the lower walking device 32 walk along the border of the photovoltaic power station according to a preset program. A first position detection device 245 is provided on the first walking beam 21, and a second position detection device 246 is provided on the second walking beam 22. The first position detection device 245 and the second position detection device 246 are arranged at opposite ends to detect the extreme positions of the detection system 1 walking along the two ends of the support system 2.

[0052] In one exemplary embodiment, the first walking beam 21 and the second walking beam 22 are each formed by assembling two support beams 23. A smooth and continuous slope is formed between the starting and ending ends of the support beams 23, with the slope being set at 1° to 3°. The support beams 23 are assembled and fixed by connector assemblies 24. When the detection system 1 reaches the connection between two adjacent support beams 23, the support beams 23 are generally horizontal. As the size of photovoltaic power plants increases with the overall technological advancement of the industry, both cleaning equipment and detection equipment are also increasing in size to meet the requirements of improving efficiency. The detection equipment of the present application is arranged on the support beams to reduce the difficulty of product design. If the support beams are too large, they will overhang, affecting the smooth operation of the detection equipment. By configuring the support beams with a slight slope, the present application eliminates the problem of the overall structure being uneven due to the overhang, ensuring the smooth operation of the detection equipment during operation and improving the overall user experience. The structure is simple and low-cost.

[0053] Specifically, the support beam 23 is a profiled member that, from bottom to top, comprises a bottom region, a middle region, and a top region. The bottom region is provided with a first receiving slot 230 extending along the direction of the support beam 23; the middle region is provided with a second receiving slot 231 extending along the direction of the support beam 23; and the top region is provided with a guide slot 232 located directly above the second receiving slot 231. The first receiving slot 230 opens downward, while the second receiving slot 231 opens horizontally. The guide slot 232 also opens horizontally.

[0054] The connector assembly 24 includes a support plate 241, a first assembly block 242, a second assembly block 243, and a fastener 244. The first assembly block 242 and the second assembly block 243 are placed in the support beam 23, and the fastener 244 is used to assemble and fix the support plate 241, the first assembly block 242, and the second assembly block 243 to the support beam 23. Specifically, the first assembly block 242 is received in the first receiving groove 230 of the support beam 23, and the second assembly block 243 is received in the second receiving groove 231 of the support beam 23. The support plate 241 is provided with an assembly hole. The fastener 244 passes through the assembly hole and assembles with the first assembly block 242 and the second assembly block 243 to fix the support plate 241 to the support beam 23.

[0055] A removable battery assembly 4 is disposed at one end of the support system 2, above the drive system 3. In one embodiment, a first latch 41 is disposed within the guide slot 232, and a second latch 42 is disposed at the bottom of the battery assembly 4, which interlocks with the first latch 41. To remove the battery assembly 4, simply apply upward force to release the first latch 41 from the second latch 42.

[0056] In an exemplary embodiment, the upper walking device 30 and the lower walking device 32 are both provided with a sensor assembly 36 for position detection. The sensor assembly 36 is used to detect the walking position of the drive system 3 on the photovoltaic power station and prevent the detection equipment from falling from the photovoltaic power station. In this application, the front and rear ends of the upper walking device 30 and the lower walking device 32 are both provided with a sensor assembly 36, and the sensor assembly 36 includes a detection wheel 361 and a travel switch 362 connected to the detection wheel 361. When the detection wheel 361 moves along the frame of the photovoltaic power station, the travel switch 362 is in a first state. When the detection wheel 361 exceeds the edge of the frame of the photovoltaic power station, the travel switch 362 is in a second state. When the central controller 7 receives the second state signal of the travel switch 362, it controls the upper / lower walking device 32 to stop moving, preventing the upper / lower walking device 32 from falling from the photovoltaic power station, thereby ensuring the safety of the overall operation of the detection equipment.

[0057] In a preferred embodiment, a reinforcement assembly 25 is provided between the first and second walking beams 21, 22. The reinforcement assembly 25 comprises a reinforcement plate 251 and a locking member 252 that secures the reinforcement plate 251 to the bottoms of the first and second walking beams 21, 22. The locking member 252 can be a combination of a bolt and nut, or a combination of a screw and an assembly block, as long as it secures the reinforcement plate 251 to the first and second walking beams 21, 22. This is not particularly limited herein. Specifically, the reinforcement assembly 25 transversely connects the first and second walking beams 21, 22 to increase the overall strength of the support system 2. In this application, multiple sets of reinforcement assemblies 25 are spaced apart at the bottoms of the first and second walking beams 21, 22. The nut or assembly block of the locking member 252 is placed in the first receiving slot 230. The reinforcement plate 251 has a through hole, through which the bolt or screw passes and partially extends into the first receiving slot 230 to secure it to the nut or assembly block.

[0058] In one embodiment, the upper traveling device 30 includes a first gear assembly 31 and a first drive motor 303 that drives the first gear assembly 31. The lower traveling device 32 includes a second gear assembly and a second drive motor 303 that drives the second gear assembly. The upper traveling device 30 is equipped with upper traveling wheels 301 for traveling along the photovoltaic power station frame and first pressure rollers 302 for traveling along the sidewalls of the photovoltaic power station frame. The lower traveling device 32 is equipped with lower traveling wheels 321 for traveling along the photovoltaic power station frame and second pressure rollers 322 for traveling along the sidewalls of the photovoltaic power station frame. The upper traveling wheels 301 and the first pressure rollers 302 are respectively driven by the first gear assembly 31, while the lower traveling wheels 321 and the second pressure rollers 322 are respectively driven by the second gear assembly. The first and second gear assemblies have the same structure, and the following structural description uses the first gear assembly 31 as an example. The first gear assembly 31 includes a main gear 311, a first bevel gear set, and a second bevel gear set. The first bevel gear group includes first and second bevel gears 312 and 313 that mesh and rotate, while the second bevel gear group includes third and fourth bevel gears 314 and 315 that mesh and rotate. The first and third bevel gears 312 and 314 are arranged horizontally and drive the upper travel wheel 301. The second and fourth bevel gears 313 and 314 are arranged vertically and drive the first pressure wheel 302. The main gear, first and second bevel gear groups are driven to move synchronously by a chain 316.

[0059] In order to reduce the overall deadweight of the detection equipment, in an exemplary embodiment, the fuselage 10 includes a frame and a shell arranged on the frame. The frame is composed of a cantilever beam 11 arranged in parallel and a connecting plate assembled with the cantilever beam 11. The shell includes a first shell 14, a second shell 15 and a third shell 16 assembled from top to bottom, the first shell and the second shell are fixedly connected by a first reinforcing rib 151, and the second shell and the third shell are fixedly connected by a second reinforcing rib 152. The light source assembly 6 is assembled to the connecting plate through an assembly plate 17 and is located above the third shell 16. Specifically, the connecting plate includes a first connecting plate 12 and a second connecting plate 13 arranged opposite to each other. In this application, the first connecting plate 12 and the second connecting plate 13 have the same structural setting, and the following detailed structural description is given taking the first connecting plate 12 as an example.

[0060] The first connecting plate 12 includes a base 121, wings 122 extending upward from the base 121, and retaining portions 123 bent inward from both ends of the base 121. The ends of the suspension beam 11 are assembled and fixed to the retaining portions 123 via locking members 252. The suspension beam 11 is an L-shaped hollow structure made of steel. A first reinforcing plate covering the vertical portion of the suspension beam 11 and assembled with the first connecting plate 12 is provided on the outside of the suspension beam 11. In this application, the hollow structure of the suspension beam 11 reduces the overall weight of the defect detection system 1 while maintaining sufficient strength.

[0061] The assembly plate 17 is an independent detachable structure. An assembly hole is provided on the assembly plate 17, and an installation hole adapted to the assembly hole is provided on the base 121. The light source assembly 6 is assembled on the frame through the assembly plate 17, which facilitates the installation, transportation and maintenance of the light source assembly 6, and can reduce the maintenance and use costs of the defect detection equipment as a whole.

[0062] The first shell 14 and the second shell 15 are hollow structures. The first shell 14 is provided with an inlet fan 140 and an outlet fan 141 opposite to the inlet fan 140. A bracket 18 assembled with the connecting plate is provided between the suspension beams 11, and the plurality of image acquisition devices 5 are arranged at intervals on the bracket 18. Specifically, a receiving cavity is formed at the top of the first shell 14. The bracket 18 includes a first angle steel arranged horizontally and an inclined support 181 for assembling the first angle steel with the first connecting plate 12 and the second connecting plate 13. The angle formed by the inclined support 181 and the horizontal plane is an acute angle. The image acquisition device 5 is assembled to the first angle steel through a mounting seat and can be adjusted in the horizontal and vertical directions. The inlet fan 140 and the outlet fan 141 are arranged on opposite sides of the first shell 14, so that convection is more easily formed inside and outside the detection system 1, thereby accelerating the heat dissipation of the detection system 1 and improving the safety of product use.

[0063] In an exemplary embodiment, the first position detection device 245 and the second position detection device 246 are detection contact switches. The detection contact switches are signal-connected to the central controller 7. When the detection system 1 moves along the first and second traveling beams 21 and 22 to the location of the detection contact switches, the detection system 1 triggers the contacts of the detection contact switches, causing the on / off states of the detection contact switches to change. Upon detecting the change in the on / off states of the detection contact switches, the central controller 7 controls the detection system 1 to stop moving according to program settings, thereby controlling the movement of the detection system 1 and ensuring safe travel.

[0064] To reduce the power required for the detection system 1 to travel on the support system 2, as a preferred embodiment, a walking wheel assembly 26 capable of rolling along the first walking beam 21 and the second walking beam 22 is provided on the fuselage 10. The walking wheel assembly 26 includes an assembly seat 260 and a horizontal wheel 261 and a vertical wheel disposed on the assembly seat 260; the assembly seat 260 is assembled to the fuselage 10 via fixings. The horizontal wheel 261 is partially received in the guide groove 232 and rolls therein, while the vertical wheel 262 rolls along the top of the guide groove 232. The rolling of the horizontal wheel 261 and the vertical wheel 262 reduces the friction between the detection system 1 and the support beam 23, thereby reducing the power required for the detection system 1 to travel, thereby reducing the cost and weight of the detection equipment as a whole. The number of the traveling wheel assemblies 26 is four, two of which are provided on the first connecting plate 12 and two on the second connecting plate 13 ; the assembly seat 260 is assembled on the first connecting plate 12 and the second connecting plate 13 .

[0065] In this application, the light source assembly 6 uses a near-infrared light source with a wavelength of 920nm to 1150nm. Using a near-infrared light source with a wavelength of 920nm to 1150nm enhances the penetration depth of the light, making it easier to detect deep defects in the photovoltaic module. Combined with the image acquisition device 5, the image capture ensures image clarity, thereby accurately capturing the status of the photovoltaic module.

[0066] The traction mechanism includes a first traction mechanism 33 disposed at the first end of the support system 2 and a second traction mechanism 34 disposed at the second end of the support system 2. The traction member 35 reciprocates the detection system 1 through the first traction mechanism 33 and the second traction mechanism 34. In an exemplary embodiment, the traction member 35 is a steel wire rope.

[0067] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A photovoltaic module defect detection device, used for defect detection of photovoltaic modules in different power stations, characterized in that: The photovoltaic power plant comprises a detection system, a support system, and a drive system; the detection system is mounted on the support system and reciprocates along the support system under the drive system's drive. The detection system comprises a body, a plurality of image acquisition devices spaced apart on the body, a light source assembly for providing light to the image acquisition devices, and a central controller, the image acquisition devices and the light source assembly being respectively connected to the central controller by signal. The support system comprises a first traveling beam and a second traveling beam arranged in parallel; the drive system comprises an upper traveling device and a lower traveling device disposed near the ends of the support system, the upper and lower traveling devices traveling along the frame of the photovoltaic power plant according to a preset program. The first traveling beam is provided with a first position detection device, and the second traveling beam is provided with a second position detection device. The first and second position detection devices are disposed at opposite ends and are used to detect the extreme positions of the detection system along the ends of the support system. The first and second traveling beams are each assembled from two support beams, forming a smooth and continuous slope between the starting and ending ends of the support beams, the slope being set between 1° and 3°. The support beams are assembled and fixed by a connector assembly.

2. The photovoltaic module defect detection device according to claim 1, characterized in that: A detachable battery assembly is provided at one end of the support system and above the drive system, and a traction member is provided on the fuselage; both ends of the traction member are fixedly provided on a traction mechanism, and the traction mechanism is provided near both ends of the support system.

3. The photovoltaic module defect detection device according to claim 2, characterized in that: The upper walking device and the lower walking device are both provided with sensor components for performing position detection.

4. The photovoltaic module defect detection device according to claim 3, characterized in that: A reinforcement assembly is provided between the first walking beam and the second walking beam; the upper walking device includes a first gear assembly and a first drive motor that drives the first gear assembly to rotate; the lower walking device includes a second gear assembly and a second drive motor that drives the second gear assembly to rotate; the upper walking device is provided with upper walking wheels that walk along the frame of the photovoltaic power station and a first pressure wheel that walks along the side wall of the frame of the photovoltaic power station; the lower walking device is provided with lower walking wheels that walk along the frame of the photovoltaic power station and a second pressure wheel that walks along the side wall of the frame of the photovoltaic power station.

5. The photovoltaic module defect detection device according to claim 4, characterized in that: The body includes a frame and a shell arranged on the frame, the frame is composed of parallel suspension beams and connecting plates assembled with the suspension beams, the shell includes a first shell, a second shell and a third shell assembled from top to bottom, and the light source assembly is assembled on the connecting plate through an assembly plate and is located above the third shell.

6. The photovoltaic module defect detection device according to claim 5, characterized in that: The first shell and the second shell are hollow structures. The first shell is provided with an inlet fan and an outlet fan opposite to the inlet fan. A bracket assembled with the connecting plate is provided between the suspension beams, and the plurality of image acquisition devices are arranged at intervals on the bracket.

7. The photovoltaic module defect detection device according to claim 6, characterized in that: The first position detection device and the second position detection device are detection contact switches, and the detection contact switches are connected to the central controller.

8. The photovoltaic module defect detection device according to claim 1, characterized in that: The connector assembly includes a support plate, a first assembly block, a second assembly block and a fastener; the first assembly block and the second assembly block are placed in the support beam, and the fastener is used to assemble and fix the support plate, the first assembly block and the second assembly block to the support beam.

9. The photovoltaic module defect detection device according to any one of claims 1 to 8, characterized in that: The fuselage is provided with a walking wheel assembly that can roll along the first walking beam and the second walking beam. The walking wheel assembly includes an assembly seat and horizontal wheels and vertical wheels arranged on the assembly seat; the assembly seat is assembled to the fuselage through a fixing piece.

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