Photovoltaic panel cleaning device, cleaning method and photovoltaic field

Abstract

The invention provides a photovoltaic panel cleaning device and method and a photovoltaic field, and belongs to the technical field of photovoltaic panel maintenance. The system comprises a support frame which stretches across a photovoltaic panel, is arranged above the photovoltaic panel, and can move above the photovoltaic panel under the action of a driving force; the two spraying mechanisms are oppositely arranged at the two ends of the supporting frame, in the moving process of the supporting frame, clear water or mixed liquid can be sprayed to the surface of the photovoltaic panel through one spraying mechanism, and the mixed liquid is prepared by mixing cleaning liquid and the clear water; the scraping plate is arranged on the supporting frame through a height adjusting mechanism and located between the two spraying mechanisms, the bottom end of the scraping plate makes contact with the upper surface of the photovoltaic panel, and the scraping plate is used for scraping clean water or mixed liquid on the surface of the photovoltaic panel in the moving process of the supporting frame and cleaning the surface of the photovoltaic panel. The cleaning device is simple in structure, low in use cost and good in cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic panel maintenance, and in particular to a photovoltaic panel cleaning device, a photovoltaic panel cleaning method and a photovoltaic field. Background Art

[0002] Currently, the existing methods of cleaning photovoltaic panels are mostly manual cleaning or fully automatic robot cleaning without clean water and semi-automatic robot cleaning with clean water. Both manual and robot cleaning with clean water require clean water, and the selected cleaning water sources are mostly civilian clean water sources or direct underground clean water. Clean water will accumulate on the edges of the cleaned photovoltaic panels, causing the clean water stains to harden and turn white, blocking the luminous surface.

[0003] Using softened water as clean water for cleaning photovoltaic panels will not cause the water stains to harden or the photovoltaic panels to turn white. However, the production cost of softened water is high and it cannot be wasted. Manual cleaning will result in a large waste of clean water resources. Using a semi-automatic robot with clean water for cleaning will not meet the cleaning requirements due to the limited amount of clean water it can carry, and cannot meet the demand for cleaning photovoltaic panels with softened water. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a photovoltaic panel cleaning device, a cleaning method and a photovoltaic field, so as to solve the above-mentioned problem that when using softened water to clean photovoltaic panels, the clean water resources are wasted greatly through manual cleaning, the amount of clean water used by semi-automatic cleaning robots is limited, etc., resulting in substandard cleaning and inability to meet the use requirements of softened water for cleaning photovoltaic panels.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a photovoltaic panel cleaning device, comprising:

[0006] A support frame is arranged above the photovoltaic panel across the photovoltaic panel and can move above the photovoltaic panel under the action of a driving force;

[0007] Two spraying mechanisms are arranged at two ends of the support frame, and during the movement of the support frame, one of the spraying mechanisms can spray clean water or a mixed liquid onto the surface of the photovoltaic panel, wherein the mixed liquid is prepared by mixing a cleaning liquid and clean water;

[0008] The scraper is arranged on the support frame through a height adjustment mechanism and is located between the two spraying mechanisms. The bottom end of the scraper contacts the upper surface of the photovoltaic panel and is used to scrape the clean water or mixed liquid on the surface of the photovoltaic panel during the movement of the support frame to clean the surface of the photovoltaic panel.

[0009] Optionally, the device further comprises:

[0010] The driving mechanism is connected to the support frame and is used to generate a driving force to drive the support frame to move above the photovoltaic panel.

[0011] Optionally, the photovoltaic panel is arranged on a mounting frame, and the driving mechanism comprises:

[0012] Two U-shaped limiting rails are symmetrically arranged on the mounting frame;

[0013] A plurality of rollers are arranged on the support frame relative to each other and can roll in the track grooves of the corresponding U-shaped limiting tracks;

[0014] A rack, arranged in the track groove of the U-shaped limiting track along the extension direction of the U-shaped limiting track;

[0015] A driving motor is arranged on the supporting frame, and a driving shaft of the driving motor is meshedly connected with the rack through a gear to generate the driving force; or

[0016] A plurality of rollers are relatively arranged on the support frame and can move on the surface of the photovoltaic panel;

[0017] A plurality of reversing wheels are symmetrically arranged on the mounting frame, and the corresponding reversing wheels are connected to each other through connecting ropes connected end to end;

[0018] A driving motor is arranged on the mounting frame, and a driving shaft of the driving motor is connected to a corresponding connecting rope for generating the driving force.

[0019] Optionally, the device further comprises:

[0020] A plurality of rollers are arranged on the support frame relative to each other and can roll in the track grooves of the corresponding U-shaped limiting tracks;

[0021] A rack, arranged in the track groove of the U-shaped limiting track along the extension direction of the U-shaped limiting track;

[0022] The driving motor is arranged on the supporting frame, and the driving shaft of the driving motor is meshedly connected with the rack through a gear to generate the driving force.

[0023] Optionally, the liquid inlets of the two spraying mechanisms are connected via a two-way valve, and each spraying mechanism comprises:

[0024] A nozzle, arranged on the support frame;

[0025] A plurality of atomizing nozzles are arranged at intervals on the nozzle pipe and are used for spraying clean water or mixed liquid onto the surface of the photovoltaic panel.

[0026] Optionally, the scraper is made of rubber; the scraper includes:

[0027] A connecting plate arranged vertically;

[0028] A touch panel, arranged on the bottom surface of the connecting plate and in contact with the upper surface of the photovoltaic panel;

[0029] The thickness of the connecting plate is greater than the thickness of the contact plate.

[0030] Optionally, the support frame is provided with a plurality of screw holes spaced apart along the length direction; and the height adjustment mechanism comprises:

[0031] A plurality of height adjustment bolts, wherein a height adjustment bolt is rotatably disposed in each screw hole;

[0032] Multiple U-shaped card plates, the top end of the connecting plate is located in the U-shaped groove of the U-shaped card plate, the top end of the U-shaped card plate is rotatably connected to the end of the height adjustment bolt through a bearing, and the height adjustment bolt is used to adjust the height of the corresponding U-shaped card plate.

[0033] In a second aspect, an embodiment of the present invention further provides a photovoltaic panel cleaning method, which is applied to the photovoltaic panel cleaning device mentioned above, and the method comprises:

[0034] Acquire the surface image of the photovoltaic panel;

[0035] Based on the surface image of the photovoltaic panel, the stain area on the surface of the photovoltaic panel is determined by using the image semantic segmentation algorithm;

[0036] If the stain area is larger than the first preset area, the spray mechanism is controlled to spray clean water for cleaning, and after the first preset number of times, the surface image of the photovoltaic panel is acquired again;

[0037] Based on the re-acquired photovoltaic panel surface image, the image semantic segmentation algorithm is used to determine the stain area on the photovoltaic panel surface after initial cleaning;

[0038] If the stain area after the initial cleaning is larger than the second preset area, the spraying mechanism is controlled to spray the mixed liquid for cleaning, and stops after reaching the second preset number of times;

[0039] The first preset area is larger than the second preset area.

[0040] Optionally, the method further includes:

[0041] After controlling the spraying mechanism to spray the mixed liquid for cleaning for a preset second preset number of times, reacquiring an image of the surface of the photovoltaic panel;

[0042] Based on the re-acquired photovoltaic panel surface image, the image semantic segmentation algorithm is used to determine the stain area on the photovoltaic panel surface after re-cleaning;

[0043] If the stain area after cleaning is larger than the third preset area, an alarm is generated;

[0044] The second preset area is larger than the third preset area.

[0045] In a third aspect, an embodiment of the present invention further provides a photovoltaic field, including:

[0046] A plurality of photovoltaic panels, each of which is provided with one of the above-mentioned photovoltaic panel cleaning devices;

[0047] At least one image capturing mechanism, used to capture an image of the surface of the photovoltaic panel;

[0048] A storage tank connected to each spraying mechanism, used for storing clean water and mixed liquid, and supplying clean water and mixed liquid to the spraying mechanism;

[0049] The controller is connected to each image capturing mechanism and each spraying mechanism, and is used to execute the above-mentioned photovoltaic panel cleaning method.

[0050] Optionally, the storage tank comprises:

[0051] A first storage tank for storing clean water;

[0052] A second storage tank, used for storing the mixed liquid;

[0053] The first storage tank and the second storage tank are connected to each spraying mechanism through a delivery pipeline, booster pumps are arranged at intervals on the delivery pipeline, and valves are arranged at the outlet ends of the first storage tank and the second storage tank.

[0054] This technical solution achieves cleaning of the photovoltaic panel surface by spraying clean water or mixed liquid onto the photovoltaic panel surface through a spraying mechanism during the cleaning process, and simultaneously scraping off the clean water or mixed liquid on the photovoltaic panel surface with a scraper. The overall structure is simple, the use cost is low, and the cleaning effect is good.

[0055] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0057] Figure 1 It is a structural schematic diagram of the photovoltaic panel cleaning device provided by the present invention;

[0058] Figure 2 is a side view of the photovoltaic panel cleaning device provided by the present invention;

[0059] Figure 3 is a top view of a photovoltaic panel cleaning device according to an embodiment of the present invention;

[0060] Figure 4 is a flow chart of a first photovoltaic panel cleaning method provided by the present invention;

[0061] Figure 5 is a flow chart of a second photovoltaic panel cleaning method provided by the present invention;

[0062] Figure 6 It is a schematic diagram of the structure of the photovoltaic field provided by the present invention.

[0063] Description of Reference Numerals

[0064] 1- Photovoltaic panel; 2- Photovoltaic panel cleaning device; 3- Image shooting mechanism;

[0065] 4-storage tank; 5-controller; 10-mounting frame;

[0066] 21-support frame; 22-spraying mechanism; 23-scraper;

[0067] 24-height adjustment mechanism; 251-U-shaped limiting track; 252-roller;

[0068] 253- rack; 254- driving motor; 255- gear;

[0069] 256-reversing wheel; 257-connecting rope; 41-first storage tank;

[0070] 42-second storage tank; 221-spray pipe; 222-atomizing nozzle;

[0071] 231-connecting plate; 232-touch plate; 241-height adjustment bolt;

[0072] 242-U-shaped clamping plate; 243-bearing. DETAILED DESCRIPTION

[0073] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0074] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the inventive product is usually placed when in use.

[0075] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0076] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0077] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0078] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0079] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] Figure 1 It is a structural schematic diagram of the photovoltaic panel cleaning device provided by the present invention; Figure 2 is a side view of the photovoltaic panel cleaning device provided by the present invention; Figure 3 is a top view of a photovoltaic panel cleaning device according to an embodiment of the present invention; Figure 4 is a flow chart of a first photovoltaic panel cleaning method provided by the present invention; Figure 5 is a flow chart of a second photovoltaic panel cleaning method provided by the present invention; Figure 6 It is a schematic diagram of the structure of the photovoltaic field provided by the present invention.

[0081] like Figure 1-2 As shown, this embodiment provides a photovoltaic panel cleaning device, the device comprising:

[0082] The support frame 21 is arranged above the photovoltaic panel 1 across the photovoltaic panel 1 and can move above the photovoltaic panel 1 under the action of a driving force;

[0083] Two spraying mechanisms 22 are arranged at two ends of the support frame 21. When the support frame moves, one of the spraying mechanisms 22 can spray clean water or a mixed liquid onto the surface of the photovoltaic panel 1. The mixed liquid is prepared by mixing a cleaning liquid and clean water.

[0084] The scraper 23 is arranged on the support frame 21 through the height adjustment mechanism 24 and is located between the two spraying mechanisms 22. The bottom end of the scraper 23 contacts the upper surface of the photovoltaic panel 1 and is used to scrape the clean water or mixed liquid on the surface of the photovoltaic panel 1 during the movement of the support frame 21 to clean the surface of the photovoltaic panel 1.

[0085] Specifically, in this embodiment, the support frame 21 plays a bearing role; two spraying mechanisms 22 are arranged on the support frame 21, and the scraper 23 is arranged between the two spraying mechanisms 22 through the height adjustment mechanism 24. When the photovoltaic panel cleaning device moves from left to right, the spraying mechanism 22 on the right sprays clean water or a mixed liquid, and then the scraper 23 scrapes off the clean water or a mixed liquid on the surface of the photovoltaic panel 1, thereby achieving the cleaning of the surface of the photovoltaic panel 1; when the photovoltaic panel cleaning device moves from right to left, the spraying mechanism 22 on the left sprays clean water or a mixed liquid, and then the scraper 23 scrapes off the clean water or a mixed liquid on the surface of the photovoltaic panel 1, thereby achieving the cleaning of the surface of the photovoltaic panel 1. In this way, the cleaning efficiency can be further improved by optimizing the structural arrangement. In addition, after the spraying mechanism 22 sprays clean water or a mixed liquid, the scraper 23 in contact with the upper surface of the photovoltaic panel 1 is used to clean the surface of the photovoltaic panel 1, which can further improve the cleaning effect.

[0086] Furthermore, the device also includes:

[0087] The driving mechanism is connected to the support frame 21 and is used to generate a driving force to drive the support frame 21 to move above the photovoltaic panel 1 .

[0088] Specifically, in this embodiment, a driving mechanism is provided to generate a driving force, thereby achieving displacement adjustment of the support frame 21 .

[0089] like Figure 1-3 As shown, the photovoltaic panel 1 is arranged on a mounting frame 10, and the driving mechanism comprises:

[0090] Two U-shaped limiting rails 251 are symmetrically arranged on the installation frame 10 .

[0091] A plurality of rollers 252 are arranged on the support frame 21 and are capable of rolling in the track grooves of the corresponding U-shaped limiting tracks 251;

[0092] A rack 253 is arranged in the track groove of the U-shaped limiting track 251 along the extension direction of the U-shaped limiting track 251;

[0093] The driving motor 254 is disposed on the supporting frame 21 , and the driving shaft of the driving motor 254 is meshedly connected with the rack 253 via a gear 255 to generate the driving force.

[0094] Specifically, in this embodiment, the photovoltaic panel 1 is arranged on the mounting frame 10, which can realize the bearing and protection of the photovoltaic panel 1, and can be specifically set as a rectangular frame; in addition, in order to ensure that the photovoltaic panel cleaning device moves along the set direction, two U-shaped limit rails 251 are relatively arranged on the mounting frame 10, and the U-shaped limit rails 251 have a concave track groove, and the end surfaces with the track groove are relatively positioned, and the support frame 21 is movably arranged on the two U-shaped limit rails 251, so that the support frame 21 moves forward and backward along the U-shaped limit rails 251 to limit its moving direction; in order to reduce the support frame 21 during the movement process Friction, multiple rollers 252 are relatively arranged on the support frame 21, and the multiple rollers 252 can roll in the accommodating space of the corresponding U-shaped limiting rail 251, thereby driving the support frame 21 to move along the extension direction of the U-shaped limiting rail 251; at the same time, in order to realize the control of the support frame 21 during the movement, a rack 253 is arranged on a U-shaped limiting rail 251, and at the same time, a driving motor 254 is arranged on the support frame 21 on this side, and the driving shaft of the driving motor 254 is meshed with the rack 253 through a gear 255, which is used to generate the driving force to drive the support frame 21 to move along the U-shaped limiting rail 251.

[0095] In another embodiment, if Figure 3 As shown, a plurality of rollers 252 are relatively arranged on the support frame 21 and can move on the surface of the photovoltaic panel 1;

[0096] A plurality of reversing wheels 256 are symmetrically arranged on the mounting frame 10, and corresponding reversing wheels 256 are connected to each other through connecting ropes 257 connected end to end;

[0097] The driving motor 254 is disposed on the mounting frame 10 , and the driving shaft of the driving motor 254 is connected to the corresponding connecting rope 257 to generate the driving force.

[0098] Specifically, in this embodiment, the photovoltaic panel 1 is arranged on the mounting frame 10, which can realize the bearing and protection of the photovoltaic panel 1, and can be specifically arranged as a rectangular frame; in order to reduce the friction during the movement of the support frame 21, a plurality of rollers 252 are relatively arranged on the lower surface of the support frame 21, and the plurality of rollers 252 can roll on the photovoltaic panel 1; at the same time, in order to realize the displacement control during the movement of the support frame 21, a plurality of reversing wheels 256 are arranged on the mounting frame 10, and the corresponding two reversing wheels 256 are connected to each other by connecting ropes 257 connected end to end, and at the same time, at least one driving motor 254 is arranged, and the driving shaft of the driving motor 254 is connected to the corresponding connecting rope 257, and the driving motor 254 realizes the reciprocating movement of the support frame 21 by forward and reverse rotation. The connecting rope 257 can be a steel wire rope, which can not only be used as a transmission medium for the driving force, but also can ensure that the photovoltaic panel cleaning device moves along the set direction and limit the moving direction of the support frame 21.

[0099] Furthermore, if Figure 1-2 The liquid inlets of the two spraying mechanisms 22 are connected via a two-way valve, and each spraying mechanism comprises:

[0100] The nozzle 221 is arranged on the support frame 21;

[0101] A plurality of atomizing nozzles 222 are arranged at intervals on the nozzle 221 for spraying clean water or a mixed liquid onto the surface of the photovoltaic panel 1 .

[0102] Specifically, in this embodiment, first, multiple nozzles 221 are arranged at intervals on the nozzle pipe 221 to evenly spray clean water or mixed liquid onto the surface of the photovoltaic panel 1, which can ensure uniform spraying and save waste of clean water or mixed liquid, thereby ensuring the cleaning effect; preferably, an atomizing nozzle can be used.

[0103] More specifically, the two spraying mechanisms 22 respectively include a first spraying mechanism arranged on the left side and a second spraying mechanism arranged on the right side. The three-way valve has a first outlet and a second outlet. The first outlet is connected to the first spraying mechanism, and the second outlet is connected to the second spraying mechanism. In addition, the three-way valve adopts mechanical switching. A switching rod 261 is arranged on the three-way valve. The rotation of the switching rod 261 can drive the valve core in the two-way valve to rotate, thereby realizing the switching of the two outlets (the first outlet and the second outlet) of the two-way valve. That is, only one can be connected and the other can be disconnected (that is, only one of the first spraying mechanism and the second spraying mechanism is in the spraying state). At the same time, a gear lever (353) is arranged at the end of the mounting frame 10. When the photovoltaic panel cleaning device moves from left to right, the second spraying mechanism on the right side sprays clean water or a mixed liquid. When the device moves to a preset point of the end of the mounting frame 10, the switching lever 261 contacts the corresponding gear lever 262, and the support frame 21 continues to move forward, thereby reversing the switching lever 261. At this time, the photovoltaic panel cleaning device is controlled to move from right to left and spray clean water or a mixed liquid through the first spraying mechanism. This arrangement makes the structure reliable and reduces the complexity of control.

[0104] Furthermore, if Figure 1-2 The scraper 23 is made of rubber; the scraper 23 includes:

[0105] A vertically arranged connecting plate 231;

[0106] A touch plate 232, disposed on the bottom surface of the connecting plate 231, in contact with the upper surface of the photovoltaic panel 1;

[0107] The thickness of the connecting plate 231 is greater than the thickness of the contact plate 232 .

[0108] Specifically, in the present embodiment, the surface is cleaned by a scraper 23, and in order to ensure the cleaning effect and protect the upper surface of the photovoltaic panel 1 at the same time, the scraper 23 is made of rubber material; in addition, since a certain force needs to be applied to the upper surface of the photovoltaic panel 1 by the scraper 23 during the movement to ensure that the dust, water stains, etc. on the upper surface of the photovoltaic panel 1 are completely scraped off, the scraper 23 needs to have a certain deformation ability, so the scraper 23 is configured to include: a vertically arranged connecting plate 231, the connecting plate 231 has a certain length and spans the surface of the photovoltaic panel 1, and in addition, a touch plate 232 is arranged on the bottom end of the connecting plate 231, and the touch plate 232 contacts the upper surface of the photovoltaic panel 1; the thickness of the connecting plate 231 is greater than the thickness of the touch plate 232, so that the material of the touch plate 232 is softer than that of the connecting plate 231, so as to achieve good contact with the surface of the photovoltaic panel 1 and ensure the cleaning effect.

[0109] Furthermore, if Figure 1-2The support frame 21 is provided with a plurality of screw holes spaced apart along the length direction; the height adjustment mechanism 24 comprises:

[0110] A plurality of height adjustment bolts 241, wherein a height adjustment bolt 241 is rotatably disposed in each screw hole;

[0111] There are multiple U-shaped card plates 242, the top end of the connecting plate 231 is located in the U-shaped groove of the U-shaped card plate 242, and the top end of the U-shaped card plate 242 is rotatably connected to the end of the height adjustment bolt 241 through a bearing 243. The height adjustment bolt 241 is used to adjust the height of the corresponding U-shaped card plate 242.

[0112] Specifically, in this embodiment, since the support frame 21 and the scraper 23 both have a certain length, there may be a certain amount of deformation. Therefore, in order to ensure the tilting effect, the scraper 23 is connected to the support frame 21 through the height adjustment mechanism 24, so that when in use, the height can be fine-tuned according to the use effect, thereby adjusting the contact force between the touch plate 232 and the upper surface of the photovoltaic panel 1. More specifically, the height adjustment mechanism 24 is configured to include: a plurality of height adjustment bolts 241, each of which is rotatably provided with a height adjustment bolt 241 in a screw hole; a plurality of U-shaped card plates 242, the top end of the connecting plate 231 is located in the U-shaped groove of the U-shaped card plate 242, the top end of the U-shaped card plate 242 is rotatably connected to the end of the height adjustment bolt 241 through a bearing 243, and the height adjustment bolt 241 is used to adjust the height of the corresponding U-shaped card plate 242. In this way, the structure is simple, the service life is long, and rapid height adjustment can be achieved.

[0113] In one embodiment, the support frame 21 is configured as an I-shaped support frame to ensure structural strength, and screw holes are directly provided at intervals on the vertical beams of the I-shaped frame.

[0114] like Figure 4 As shown, this embodiment provides a photovoltaic panel cleaning method, which is applied to the above-mentioned photovoltaic panel cleaning device, and the method includes:

[0115] Acquire the surface image of the photovoltaic panel;

[0116] Based on the surface image of the photovoltaic panel, the stain area on the surface of the photovoltaic panel is determined by using the image semantic segmentation algorithm;

[0117] If the stain area is larger than the first preset area, the spray mechanism is controlled to spray clean water for cleaning, and after the first preset number of times, the surface image of the photovoltaic panel is acquired again;

[0118] Based on the re-acquired photovoltaic panel surface image, the image semantic segmentation algorithm is used to determine the stain area on the photovoltaic panel surface after initial cleaning;

[0119] If the stain area after the initial cleaning is larger than the second preset area, the spraying mechanism is controlled to spray the mixed liquid for cleaning, and stops after reaching the second preset number of times;

[0120] The first preset area is larger than the second preset area.

[0121] Specifically, in the present embodiment, dust, bird droppings, leaves and other stains may accumulate on the surface of the photovoltaic panel during use, which may block the photovoltaic panel and thus reduce the power generation efficiency of the photovoltaic panel. Therefore, in actual use, the surface image of the photovoltaic panel is acquired at a preset time interval, and the surface image of the photovoltaic panel is analyzed by an image semantic segmentation algorithm, so as to extract the type and area of ​​the stain on the photovoltaic panel (such as by color change to achieve stain identification), determine the stain area on the surface of the photovoltaic panel, and when it is determined that the stain area is larger than the first preset area, it means that there is a lot of blockage and the photovoltaic panel needs to be cleaned by timing. Therefore, at this time, the spraying mechanism is controlled to spray clean water for cleaning. After the first preset number of times (such as controlling the photovoltaic panel to clean The cleaning device moves one back and forth along the U-shaped limit track, that is, the photovoltaic panel is cleaned twice), and then the surface image of the photovoltaic panel is re-acquired. Based on the re-acquired surface image of the photovoltaic panel, the image semantic segmentation algorithm is used to determine the stain area on the surface of the photovoltaic panel after the initial cleaning. If the stain area after the initial cleaning is less than or equal to the second preset area at this time, it means that the effect of cleaning with clean water is better, and the stains on the surface of the photovoltaic panel have been basically cleaned, and no subsequent cleaning is required; if the stain area after the initial cleaning is greater than the second preset area at this time, it means that the effect of cleaning with clean water is poor. At this time, the spraying mechanism is controlled to spray the mixed liquid for cleaning, and stop after the preset second preset number of times (such as controlling the photovoltaic panel cleaning device to move one back and forth along the U-shaped limit track, that is, cleaning the photovoltaic panel twice).

[0122] Furthermore, if Figure 5 As shown, the method also includes:

[0123] After controlling the spraying mechanism to spray the mixed liquid for cleaning for a preset second preset number of times, reacquiring an image of the surface of the photovoltaic panel;

[0124] Based on the re-acquired photovoltaic panel surface image, the image semantic segmentation algorithm is used to determine the stain area on the photovoltaic panel surface after re-cleaning;

[0125] If the stain area after cleaning is larger than the third preset area, an alarm is generated;

[0126] The second preset area is larger than the third preset area.

[0127] Specifically, in this embodiment, after the surface of the photovoltaic panel is cleaned by spraying clean water through the above-mentioned scheme, if the area of ​​the stain after the initial cleaning is larger than the second preset area, it means that the effect of cleaning with clean water is poor. At this time, the spraying mechanism is controlled to spray the mixed liquid for cleaning, and it stops after the preset second preset number of times, and the surface image of the photovoltaic panel is re-acquired; based on the re-acquired surface image of the photovoltaic panel, the image semantic segmentation algorithm is used to determine the area of ​​the stain on the surface of the photovoltaic panel after re-cleaning; if the area of ​​the stain after re-cleaning is larger than the third preset area, it means that the cleaning liquid cannot be effectively cleaned, and an alarm is generated, and maintenance personnel intervene to perform manual cleaning.

[0128] like Figure 6 As shown, this embodiment provides a photovoltaic field, including:

[0129] A plurality of photovoltaic panels 1, each photovoltaic panel 1 being provided with a photovoltaic panel cleaning device 2 as described above;

[0130] At least one image capturing mechanism 3, used for capturing an image of the surface of the photovoltaic panel;

[0131] A storage tank 4, connected to each spraying mechanism 22, for storing clean water and mixed liquid, and supplying clean water and mixed liquid to the spraying mechanism 22;

[0132] The controller 5 is connected to each image capturing mechanism 3 and each spraying mechanism 22, and is used to execute the above-mentioned photovoltaic panel cleaning method.

[0133] Specifically, in this embodiment, the number of image capturing mechanisms 3 is matched with the number of photovoltaic panels 1, which can ensure that all photovoltaic panels 1 can be photographed with clear photos that can be used for subsequent graphic analysis; and the image capturing mechanism 3 is set at a certain height through a support rod to capture a complete surface image of the photovoltaic panel.

[0134] Furthermore, the storage tank 4 comprises:

[0135] A first storage tank 41, for storing clean water;

[0136] A second storage tank 42, used for storing the mixed liquid;

[0137] The first storage tank 41 and the second storage tank 42 are connected to each spraying mechanism 22 via a delivery pipeline, and booster pumps are arranged at intervals on the delivery pipeline. The outlet ends of the first storage tank 41 and the second storage tank 42 are respectively provided with valves.

[0138] Specifically, in this embodiment, a first storage tank 41 is provided for storing clean water; a second storage tank 42 is provided for storing a mixed liquid so that it can be supplied when it is needed, which can improve the convenience of use; the outlet ends of the first storage tank 41 and the second storage tank 42 are connected to the delivery pipeline through a three-way valve. In addition, in order to ensure that the pressure of the liquid entering each is relatively balanced, the first storage tank 41 and the second storage tank 42 are connected to each spraying mechanism 22 through a delivery pipeline, and a booster pump is provided on the delivery pipeline at a certain distance. In addition, in order to realize the supply of corresponding clean water or mixed liquid, valves are respectively provided at the outlet ends of the first storage tank 41 and the second storage tank 42, so as to realize the opening and closing control of the outlet end. Specifically, an electric valve or the like can be used to realize remote control.

[0139] In another embodiment, the spraying mechanism 22 is connected to the conveying pipeline through a branch pipe, and the branch pipe is configured as a hose, which can be rolled up by a winding mechanism (such as a winding roller and a retaining spring) disposed on the mounting frame 10, and can be extended and retracted along with the movement of the photovoltaic panel cleaning device 2 to avoid entanglement during the movement of the photovoltaic panel cleaning device 2.

[0140] In another embodiment, the spraying mechanism 22 is connected to the conveying pipeline through a branch pipe, and the branch pipe is configured as a hose. The conveying pipeline is configured in the middle part below the photovoltaic panel 1. When the photovoltaic panel cleaning device 2 moves to the middle part of the photovoltaic panel 1, the branch pipe is in a bent state. When the photovoltaic panel cleaning device 2 moves to both ends of the photovoltaic panel 1, the branch pipe is in a straight state, which can effectively prevent the branch pipe from being entangled.

[0141] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0142] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0143] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner when there is no contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0144] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A photovoltaic panel cleaning device, characterized in that: The device comprises: A support frame (21) is arranged across the photovoltaic panel (1) and can move above the photovoltaic panel (1) under the action of a driving force; Two spraying mechanisms (22) are arranged at two ends of the support frame (21) opposite to each other, and during the movement of the support frame (21), one of the spraying mechanisms (22) can spray clean water or a mixed liquid onto the surface of the photovoltaic panel (1), wherein the mixed liquid is prepared by mixing a cleaning liquid and clean water; A scraper (23) is arranged on the support frame (21) through a height adjustment mechanism (24) and is located between the two spraying mechanisms (22). The bottom end of the scraper (23) contacts the upper surface of the photovoltaic panel (1) and is used to scrape clean water or mixed liquid on the surface of the photovoltaic panel (1) during the movement of the support frame (21) to clean the surface of the photovoltaic panel (1).

2. The photovoltaic panel cleaning device according to claim 1, characterized in that: The device also includes: The driving mechanism is connected to the support frame (21) and is used to generate a driving force to drive the support frame (21) to move above the photovoltaic panel (1).

3. The photovoltaic panel cleaning device according to claim 2, characterized in that: The photovoltaic panel (1) is arranged on a mounting frame (10), and the driving mechanism comprises: Two U-shaped limiting rails (251) are symmetrically arranged on the installation frame (10); A plurality of rollers (252) are relatively arranged on the support frame (21) and are capable of rolling in the track grooves of the corresponding U-shaped limiting tracks (251); A rack (253) is arranged in a track groove of the U-shaped limiting track (251) along an extension direction of the U-shaped limiting track (251); A driving motor (254) is arranged on the support frame (21), and a driving shaft of the driving motor (254) is meshedly connected with the rack (253) via a gear (255) to generate the driving force; or A plurality of rollers (252) are arranged relatively on the support frame (21) and are capable of moving on the surface of the photovoltaic panel (1); A plurality of reversing wheels (256) are symmetrically arranged on the mounting frame (10), and the corresponding reversing wheels (256) are connected to each other via a connecting rope (257) connected end to end; A driving motor (254) is arranged on the mounting frame (10), and a driving shaft of the driving motor (254) is connected to a corresponding connecting rope (257) for generating the driving force.

4. The photovoltaic panel cleaning device according to claim 1, characterized in that: The liquid inlets of the two spraying mechanisms (22) are connected via a two-way valve, and each spraying mechanism comprises: A nozzle (221) is arranged on the support frame (21); A plurality of atomizing nozzles (222) are arranged at intervals on the nozzle (221) and are used to spray clean water or a mixed liquid onto the surface of the photovoltaic panel (1).

5. The photovoltaic panel cleaning device according to claim 1, characterized in that: The scraper (23) is made of rubber; the scraper (23) comprises: A vertically arranged connecting plate (231); A touch panel (232) is arranged on the bottom surface of the connecting plate (231) and contacts the upper surface of the photovoltaic panel (1); The thickness of the connecting plate (231) is greater than the thickness of the contact plate (232).

6. The photovoltaic panel cleaning device according to claim 5, characterized in that: The support frame (21) is provided with a plurality of screw holes at intervals along the length direction; the height adjustment mechanism (24) comprises: A plurality of height adjustment bolts (241), wherein a height adjustment bolt (241) is rotatably disposed in each screw hole; A plurality of U-shaped card plates (242), the top end of the connecting plate (231) is located in the U-shaped groove of the U-shaped card plate (242), the top end of the U-shaped card plate (242) is rotatably connected to the end of the height adjustment bolt (241) through a bearing (243), and the height adjustment bolt (241) is used to adjust the height of the corresponding U-shaped card plate (242).

7. A photovoltaic panel cleaning method, applied to the photovoltaic panel cleaning device according to any one of claims 1 to 6, characterized in that: The method comprises: Acquire the surface image of the photovoltaic panel; Based on the surface image of the photovoltaic panel, the stain area on the surface of the photovoltaic panel is determined by using the image semantic segmentation algorithm; If the stain area is larger than the first preset area, the spray mechanism is controlled to spray clean water for cleaning, and after the first preset number of times, the surface image of the photovoltaic panel is acquired again; Based on the re-acquired photovoltaic panel surface image, the image semantic segmentation algorithm is used to determine the stain area on the photovoltaic panel surface after initial cleaning; If the stain area after the initial cleaning is larger than the second preset area, the spraying mechanism is controlled to spray the mixed liquid for cleaning, and stops after the second preset number of times; The first preset area is larger than the second preset area.

8. The photovoltaic panel cleaning method according to claim 7, characterized in that: The method further comprises: After controlling the spraying mechanism to spray the mixed liquid for cleaning for a preset second preset number of times, reacquiring an image of the photovoltaic panel surface; Based on the re-acquired photovoltaic panel surface image, the image semantic segmentation algorithm is used to determine the stain area on the photovoltaic panel surface after re-cleaning; If the stain area after cleaning is larger than the third preset area, an alarm is generated; The second preset area is larger than the third preset area.

9. A photovoltaic field, characterized in that: include: A plurality of photovoltaic panels (1), each photovoltaic panel (1) being provided with a photovoltaic panel cleaning device (2) according to any one of claims 1 to 6; At least one image capturing mechanism (3) for capturing an image of the surface of the photovoltaic panel; A storage tank (4) connected to each spraying mechanism (22) for storing clean water and mixed liquid, and supplying clean water and mixed liquid to the spraying mechanism (22); A controller (5) is connected to each image capturing mechanism (3) and each spraying mechanism (22), and is used to execute the photovoltaic panel cleaning method according to any one of claims 7 to 8.

10. The photovoltaic field according to claim 9, characterized in that The storage tank (4) comprises: A first storage tank (41) for storing clean water; A second storage tank (42) for storing the mixed liquid; The first storage tank (41) and the second storage tank (42) are connected to each spraying mechanism (22) via a delivery pipeline, and booster pumps are arranged at intervals on the delivery pipeline. Valves are arranged at the outlet ends of the first storage tank (41) and the second storage tank (42).

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