Intelligent photovoltaic cleaning nozzle and working method thereof

Abstract

The invention discloses an intelligent photovoltaic cleaning nozzle and a working method thereof, belonging to the field of photovoltaic power generation technology. It includes a nozzle assembly, a rotating base, a high-definition camera, a control system, a water tank, a water pipe, a water pump and a pitch axis; the pitch axis is arranged on the rotating base; the nozzle assembly includes a nozzle seat, a fan-shaped nozzle and a long-range nozzle, the nozzle seat is connected to the pitch axis, the fan-shaped nozzle is arranged on one side of the nozzle seat, the long-range nozzle is arranged on the other side of the nozzle seat, and the fan-shaped nozzle and the long-range nozzle are respectively connected to the nozzle seat; one end of the water pipe is connected to the water tank, and the other end is respectively connected to the fan-shaped nozzle and the long-range nozzle through a tee, and the water pump is arranged on the water pipe; the high-definition camera is arranged directly opposite to the photovoltaic assembly; the rotating base, the high-definition camera, the water pump and the pitch axis are respectively connected to the control system. The invention has a reasonable structural design and a high degree of automation. It can formulate a suitable cleaning plan according to the stain situation and perform all-round and intelligent cleaning.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation, and in particular relates to an intelligent photovoltaic cleaning nozzle and a working method thereof. Background Art

[0002] Ground photovoltaic power stations are often located in remote areas, such as the Gobi Desert and plateaus. These areas have harsh environments and strong winds and sand, which leads to serious dust accumulation on the surface of photovoltaic modules, reducing the solar radiation energy absorbed by the photovoltaic modules. Therefore, the cleaning of components in ground photovoltaic power stations has become an indispensable part of power station operation and maintenance.

[0003] At present, many ground photovoltaic power stations have adopted automatic cleaning technology, using automatic cleaning robots to move on the sunny side of the components through a motion path pre-set in the controller to achieve fully automatic cleaning of the components. However, in addition to the high cost, this technology is also limited by the tilt angle of the components. When the tilt angle of the components is large, it is not easy for the automatic cleaning robot to adhere to the surface of the components, making cleaning difficult.

[0004] Some photovoltaic power stations have also adopted drone cleaning technology, using drones to carry cleaning systems and cooperate with image recognition technology to complete the cleaning of photovoltaic modules. However, this technology still requires manual positioning of stains when performing local cleaning, which increases labor costs. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide an intelligent photovoltaic cleaning nozzle and a working method thereof, which has a reasonable structural design and can formulate a suitable cleaning plan according to the stain situation to perform all-round and intelligent cleaning.

[0006] The present invention is achieved through the following technical solutions:

[0007] The invention discloses an intelligent photovoltaic cleaning nozzle, comprising a nozzle assembly, a rotating base, a high-definition camera, a control system, a water tank, a water pipe, a water pump and a pitch axis;

[0008] The pitch axis is arranged on the rotating base; the nozzle assembly includes a nozzle seat, a fan-shaped nozzle and a long-range nozzle, the nozzle seat is connected to the pitch axis, the fan-shaped nozzle is arranged on one side of the nozzle seat, and the long-range nozzle is arranged on the other side of the nozzle seat, and the fan-shaped nozzle and the long-range nozzle are respectively connected to the nozzle seat; one end of the water pipe is connected to the water tank, and the other end is respectively connected to the fan-shaped nozzle and the long-range nozzle through a tee, and the water pump is arranged on the water pipe; the high-definition camera is arranged directly opposite to the photovoltaic module; the rotating base, the high-definition camera, the water pump and the pitch axis are respectively connected to the control system.

[0009] Preferably, the water pump is a high-pressure variable frequency pump.

[0010] Preferably, the spray angle of the fan-shaped nozzle is 25° to 65°.

[0011] Preferably, the range of the long-range nozzle covers the surface of the photovoltaic module.

[0012] Preferably, the control system includes a processor, an image processing module, a storage module and a drive module; the processor is connected to the image processing module, the storage module and the drive module respectively, the image processing module is connected to the high-definition camera, and the drive module is connected to the rotating base, the water pump and the pitch axis respectively.

[0013] Preferably, a water pump and a water level alarm device are provided in the water tank, the water pump is connected to the water source through a water pipe, and the water pump and the water level alarm device are respectively connected to a control system.

[0014] Preferably, a polarizing filter is provided in front of the high-definition camera.

[0015] Preferably, the water pipe is a stainless steel hose.

[0016] Preferably, the rotating base is provided with a damping mechanism.

[0017] The working method of the above-mentioned intelligent photovoltaic cleaning nozzle disclosed in the present invention comprises the following steps:

[0018] Step 1: The control system presets the brightness threshold of the photovoltaic module, and the high-definition camera collects the image of the photovoltaic module surface and sends it to the control system for analysis;

[0019] Step 2: If the brightness of the photovoltaic module is higher than or equal to the brightness threshold, the cleaning function is not started; if the brightness of the photovoltaic module is lower than the brightness threshold and the overall brightness is uniform, the control system controls the rotating base and the pitch axis to direct the fan-shaped nozzle toward the photovoltaic module and perform scanning cleaning; if the brightness of the photovoltaic module is lower than the brightness threshold and the overall brightness is uneven, the control system controls the rotating base and the pitch axis to direct the long-range nozzle toward the photovoltaic module and perform local cleaning;

[0020] Step 3: After each cleaning is completed, the high-definition camera collects images of the surface of the photovoltaic module again and sends them to the control system for analysis and repeats step 2 until the brightness of the photovoltaic module is higher than or equal to the brightness threshold.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The present invention discloses an intelligent photovoltaic cleaning nozzle. With the help of image recognition technology, the control system judges the cleanliness of the photovoltaic module according to the data collected by the high-definition camera, and adopts different cleaning modes of the fan-shaped nozzle and the long-range nozzle according to the dirty situation, thereby saving the amount of cleaning water and achieving the intelligent cleaning goal. By rotating the base and the pitch axis, the fan-shaped nozzle and the long-range nozzle can be switched, the nozzle can be swept and the angle can be adjusted at the same time, and the photovoltaic module can be cleaned in an all-round way. The device has a reasonable structural design, a high degree of automation, and good application prospects.

[0023] Furthermore, the water pump adopts a high-pressure variable frequency pump, which can control the water flow and pressure to adapt to different cleaning modes.

[0024] Furthermore, the spray angle of the fan-shaped nozzle is 25° to 65°, which can cover a larger range and is easy to control.

[0025] Furthermore, the range of the long-range nozzle covers the surface of the photovoltaic module, ensuring that there are no dead corners during cleaning.

[0026] Furthermore, a water pump and a water level alarm device are provided in the water tank, so that water can be replenished in time.

[0027] Furthermore, a polarizing filter is provided in front of the high-definition camera to prevent the reflected light from the surface of the photovoltaic module from affecting the accuracy of the image acquisition data.

[0028] Furthermore, the water pipe adopts a stainless steel hose, which has high strength and long service life.

[0029] Furthermore, the rotating base is provided with a damping mechanism, so that the rotation is stable and the cleaning effect is good.

[0030] The working method of the intelligent photovoltaic cleaning nozzle disclosed in the present invention can formulate a suitable cleaning plan according to the stain situation, perform all-round and intelligent cleaning, have a high degree of automation, and have good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] In the figure: 1 is the nozzle assembly, 2 is the rotating base, 3 is the high-definition camera, 4 is the control system, 5 is the water tank, 6 is the water pipe, 7 is the water pump, and 8 is the pitch axis. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings, the contents of which are intended to explain the present invention rather than to limit it:

[0034] like Figure 1, is the intelligent photovoltaic cleaning nozzle of the present invention, including a nozzle assembly 1, a rotating base 2, a high-definition camera 3, a control system 4, a water tank 5, a water pipe 6, a water pump 7 and a pitch axis 8.

[0035] The pitch axis 8 is arranged on the rotating base 2; preferably, the rotating base 2 is provided with a damping mechanism, which can make the rotating base 2 rotate more smoothly, so that the water mist or water column sprayed by the fan-shaped nozzle and the long-range nozzle is stable, thereby improving the cleaning effect.

[0036] The nozzle assembly 1 includes a nozzle seat, a fan-shaped nozzle and a long-range nozzle. The nozzle seat is connected to the pitch axis 8. The fan-shaped nozzle is arranged on one side of the nozzle seat, and the long-range nozzle is arranged on the other side of the nozzle seat. The fan-shaped nozzle and the long-range nozzle are respectively connected to the nozzle seat.

[0037] One end of the water pipe 6 is connected to the water tank 5, and the other end is connected to the fan nozzle and the long-range nozzle through a tee. The water pump 7 is arranged on the water pipe 6. The water pump 7 is preferably a high-pressure variable frequency pump. The spray angle of the fan nozzle is 25° to 65°, and the range of the long-range nozzle covers the surface of the photovoltaic module.

[0038] The high-definition camera 3 is arranged facing the photovoltaic module; preferably, a polarizing filter is arranged in front of the high-definition camera 3. The rotating base 2, the high-definition camera 3, the water pump 7 and the pitch axis 8 are respectively connected to the control system 4.

[0039] The control system 4 includes a processor, an image processing module, a storage module and a drive module; the processor is connected to the image processing module, the storage module and the drive module respectively; the image processing module is connected to the high-definition camera 3, and the image processing module analyzes the brightness of the captured photovoltaic component image: if the brightness is higher than the cleaning preset value, the photovoltaic component does not need to be cleaned, and the cleaning function is not started; if the brightness is lower than the cleaning preset value, and the overall brightness of the image is uniform, the fan-shaped nozzle is enabled and scanning cleaning begins; if the brightness is lower than the cleaning preset value, and the overall brightness of the image is unevenly distributed in a dotted manner, the long-range nozzle is enabled and local cleaning begins. The storage module can store image information, and the processor is used for information processing, program operation, etc.

[0040] The driving module is connected to the rotating base 2, the water pump 7 and the pitch axis 8 respectively, and is used to drive the rotating base 2 and the pitch axis 8 to rotate, and change the azimuth and pitch angles of the nozzle assembly 1. In addition, the driving module can also change the frequency of the water pump 7 according to the cleaning mode to achieve the control of the water flow rate and water pressure.

[0041] In a preferred embodiment of the present invention, a water pump and a water level alarm device are provided in the water tank 5, the water pump is connected to the water source through a water pipe, and the water pump and the water level alarm device are respectively connected to the control system 4. Preferably, the water pipe 6 is a stainless steel hose.

[0042] The working method of the above-mentioned intelligent photovoltaic cleaning nozzle comprises the following steps:

[0043] Step 1: The control system 4 presets the brightness threshold of the photovoltaic module, and the high-definition camera 3 collects a high-resolution image of the surface of the photovoltaic module and sends it to the control system 4 for analysis;

[0044] Step 2: If the brightness of the photovoltaic module is higher than or equal to the brightness threshold, the cleaning function is not started; if the brightness of the photovoltaic module is lower than the brightness threshold and the overall brightness is uniform, the control system 4 controls the rotating base 2 and the pitch axis 8 to direct the fan-shaped nozzle toward the photovoltaic module and perform scanning cleaning; if the brightness of the photovoltaic module is lower than the brightness threshold and the overall brightness is uneven, the control system 4 controls the rotating base 2 and the pitch axis 8 to direct the long-range nozzle toward the photovoltaic module and perform local cleaning;

[0045] Step 3: After each cleaning is completed, the high-definition camera 3 collects images of the surface of the photovoltaic module again and sends them to the control system 4 for analysis and repeats step 2 until the brightness of the photovoltaic module is higher than or equal to the brightness threshold.

[0046] In actual use, firstly, the high-definition camera 3 is aimed at the photovoltaic module to capture the complete image of the module. When the control system 4 sounds a prompt, it means that this photovoltaic module does not need to be cleaned; when entering the scanning cleaning mode, the horizontal rotating surface of the rotating base 2 first drives the fan-shaped nozzle to achieve horizontal cleaning. After completing a horizontal cleaning, the pitch axis of the rotating base 2 drives the fan-shaped nozzle to rotate longitudinally until the fan-shaped nozzle is aimed at the uncleaned area, and then the fan-shaped nozzle begins to reversely clean the photovoltaic module horizontally; when entering the local cleaning mode, the long-range nozzle will rotate to the position facing the photovoltaic module, and the specific area of ​​the photovoltaic module will be cleaned by horizontal rotation and pitch; after each complete cleaning, the high-definition camera 3 will re-take the image and upload it to the control system 4 for secondary analysis until the control system 4 sounds a prompt, the cleaning effect of this photovoltaic module is qualified, and this cleaning is completed.

[0047] The above is only part of the embodiments of the present invention. Although some terms are used in the present invention, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present invention. It is contrary to the spirit of the present invention to interpret them as any additional restrictions. The above is only to further illustrate the content of the present invention with examples for easier understanding, but it does not mean that the embodiments of the present invention are limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention.

Claims

1. An intelligent photovoltaic cleaning nozzle, characterized in that: It includes a nozzle assembly (1), a rotating base (2), a high-definition camera (3), a control system (4), a water tank (5), a water pipe (6), a water pump (7) and a pitch axis (8); The pitch axis (8) is arranged on the rotating base (2); the nozzle assembly (1) comprises a nozzle base, a fan-shaped nozzle and a long-range nozzle; the nozzle base is connected to the pitch axis (8); the fan-shaped nozzle is arranged on one side of the nozzle base, and the long-range nozzle is arranged on the other side of the nozzle base; the fan-shaped nozzle and the long-range nozzle are respectively connected to the nozzle base; one end of the water pipe (6) is connected to the water tank (5), and the other end is respectively connected to the fan-shaped nozzle and the long-range nozzle through a three-way connection; the water pump (7) is arranged on the water pipe (6); the high-definition camera (3) is arranged facing the photovoltaic module; the rotating base (2), the high-definition camera (3), the water pump (7) and the pitch axis (8) are respectively connected to the control system (4); The control system (4) comprises a processor, an image processing module, a storage module and a drive module; the processor is connected to the image processing module, the storage module and the drive module respectively, the image processing module is connected to the high-definition camera (3), and the drive module is connected to the rotating base (2), the water pump (7) and the pitch axis (8) respectively; The image processing module analyzes the brightness of the captured photovoltaic module image: if the brightness is higher than the cleaning preset value, the photovoltaic module does not need to be cleaned and the cleaning function is not started; if the brightness is lower than the cleaning preset value and the overall brightness of the image is uniform, the fan-shaped nozzle is enabled and scanning cleaning begins; if the brightness is lower than the cleaning preset value and the overall brightness of the image is unevenly distributed in a dotted manner, the long-range nozzle is enabled and local cleaning begins.

2. The intelligent photovoltaic cleaning nozzle according to claim 1, characterized in that: The water pump (7) is a high-pressure variable frequency pump.

3. The intelligent photovoltaic cleaning nozzle according to claim 1, characterized in that: The spray angle of the fan nozzle is 25°~65°.

4. The intelligent photovoltaic cleaning nozzle according to claim 1, characterized in that: The range of the long-range sprinkler covers the surface of the photovoltaic module.

5. The intelligent photovoltaic cleaning nozzle according to claim 1, characterized in that: A water pump and a water level alarm device are provided in the water tank (5); the water pump is connected to a water source via a water pipe; and the water pump and the water level alarm device are respectively connected to a control system (4).

6. The intelligent photovoltaic cleaning nozzle according to claim 1, characterized in that: A polarizing filter is provided in front of the high-definition camera (3).

7. The intelligent photovoltaic cleaning nozzle according to claim 1, characterized in that: The water pipe (6) is a stainless steel hose.

8. The intelligent photovoltaic cleaning nozzle according to claim 1, characterized in that: The rotating base (2) is provided with a damping mechanism.

9. The working method of the intelligent photovoltaic cleaning nozzle according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: The control system (4) presets the brightness threshold of the photovoltaic module, and the high-definition camera (3) collects images of the surface of the photovoltaic module and sends them to the control system (4) for analysis; Step 2: If the brightness of the photovoltaic module is higher than or equal to the brightness threshold, the cleaning function is not started; if the brightness of the photovoltaic module is lower than the brightness threshold and the overall brightness is uniform, the control system (4) controls the rotating base (2) and the pitch axis (8) to direct the fan-shaped nozzle toward the photovoltaic module and perform scanning cleaning; if the brightness of the photovoltaic module is lower than the brightness threshold and the overall brightness is uneven, the control system (4) controls the rotating base (2) and the pitch axis (8) to direct the long-range nozzle toward the photovoltaic module and perform local cleaning; when entering the scanning cleaning mode, the horizontal rotating surface of the rotating base (2) first drives the fan-shaped nozzle to achieve horizontal cleaning, and after completing a horizontal cleaning, the pitch axis (8) of the rotating base (2) drives the fan-shaped nozzle to rotate longitudinally until the fan-shaped nozzle is aligned with the uncleaned area, and then the fan-shaped nozzle starts to perform reverse horizontal cleaning on the photovoltaic module; when entering the local cleaning mode, the long-range nozzle will rotate to a position facing the photovoltaic module, and the specific area of ​​the photovoltaic module will be cleaned by horizontal rotation and pitching; Step 3: After each cleaning is completed, the high-definition camera (3) collects images of the surface of the photovoltaic module again and sends them to the control system (4) for analysis and repeats step 2 until the brightness of the photovoltaic module is higher than or equal to the brightness threshold.

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