Self-shielding type solar panel inspection and cleaning method and system

Abstract

The embodiment of the invention discloses a self-shielding type solar panel inspection and cleaning method and system, and the method comprises the steps: carrying out the multi-stage division of a solar panel, dividing the solar panel into a plurality of unit regions and grids, and obtaining the power generation data of each unit region through an inverter system, then, the cleaning robot shields each grid of the solar panel in a unit area step by step after cleaning, meanwhile, the efficiency change rate is calculated, the power generation efficiency of the shielded grids is evaluated by performing threshold judgment on the efficiency change rate, and the cleaning robot inspects the grids, generates an inspection report and sends the inspection report back to the central control unit; and people are guided to overhaul the solar panel. According to the invention, the solar panel can be automatically cleaned and inspected, the power generation efficiency change of the solar panel can be accurately mastered, and people can be guided to maintain and replace the solar panel.

Description

Technical Field

[0001] The present invention relates to the field of solar power generation, and particularly to a self-blocking solar panel inspection and cleaning method. Background Art

[0002] With the development of technology, solar photovoltaic power generation has been widely used. In order to improve the lighting efficiency, most solar photovoltaic power generation systems are selected to be set on mountains or in desert areas with sufficient light sources. They not only have a large coverage area but also have a harsh environment.

[0003] The above situation makes it necessary to regularly clean and inspect solar panels during use to avoid a decrease in power generation efficiency due to foreign object occlusion, surface damage of the panel, or problems with the solar panel itself. In order to meet the needs of large-area inspection and cleaning, various manufacturers in the market have launched a variety of cleaning and inspection devices. For example, a solar panel surface maintenance and inspection method and system disclosed in the prior art CN115145305A mainly realizes the maintenance and inspection of solar panels through drones. However, its inspection method often adopts a visual capture scheme by drones. Although such a method can detect problems such as foreign object occlusion or surface damage of the panel, it cannot detect problems such as a decrease in power generation efficiency caused by the aging of internal materials or wire damage of the solar panel.

[0004] To solve the above problems, this solution designs a self-blocking solar panel inspection and cleaning method and system. Summary of the Invention

[0005] To solve the above technical problems, an embodiment of the present invention provides a self-blocking solar panel inspection and cleaning method, including the following steps: Step S1: Data collection and evaluation. Divide the solar panel into several unit areas with the same area, divide several grids in each area, and obtain an estimated value of the power generation of the unit area; Step S2: The cleaning robot moves to the unit area for cleaning. After cleaning, the shielding plate is unfolded, and each grid of the unit area is gradually blocked; Step S3: Obtain the power generation of the unit area after shielding, and calculate it in combination with the estimated value of the power generation of the unit area in Step S1 to obtain the efficiency change rate; Step S4: When the efficiency change rate in Step S3 is greater than the preset threshold, the cleaning robot moves to other unit areas, and repeats Steps S2 and S3 until the inspection and cleaning of the solar panel are completed; When the ratio of the power generation of the unit area after occlusion to the estimated value of the power generation of the unit area in step S1 is less than the preset threshold, the unit area is marked, and at the same time, the cleaning robot enters the troubleshooting program. After completing the troubleshooting program, the cleaning robot moves to other areas, and steps S2 and S3 are repeated until the inspection and cleaning of the solar panels are completed.

[0006] Among them, the step S1 includes: Step S11: Collect the power generation data of each unit area and divide the power generation cycle according to the light intensity; Step S12: Record the power generation of each unit area within the power generation cycle, merge the power generations of the power generation cycles with the same light intensity, calculate the average value, and regard this average value as the estimated value of the power generation of the unit area under this light intensity in this unit area. Among them, after the cleaning robot in step S2 unfolds the baffle, it should be the same as the grid area to be occluded.

[0007] Among them, the calculation formula of the efficiency change rate in step S3 is as follows:

[0008] Among them, E is the efficiency change rate, P 测 is the power generation of the unit area obtained in step S3, P 估 is the estimated value of the power generation of the unit area obtained in step S1, S 区 is the area of the unit area, S 网 is the area of the grid.

[0009] Among them, the troubleshooting program in step S4 includes the following steps: Step S41: Perform visual capture and infrared imaging detection to check whether there are visible faults in the solar panel within the grid; After the inspection, record all the visible faults found in the grid and upload them.

[0010] Among them, the troubleshooting program in step S4 includes the following steps: Step S41: Perform visual capture and infrared imaging detection to check whether there are visible faults in the solar panel within the grid; After the inspection, record all the visible faults found in the grid and upload them.

[0011] To solve the above-mentioned self-occluding solar panel inspection and cleaning method, the embodiment of the present invention also provides a self-occluding solar panel inspection and cleaning method, including: an inverter system, a central control unit, and a cleaning robot.

[0012] The inverter system is connected to each unit area of the solar panel and can obtain the power generation of each unit area; The central control unit includes: a processor and a memory. The processor is used to control the connection of the cleaning robot, and the memory is used to receive the power generation data obtained by the inverter system and the inspection data of the cleaning robot, and then calculate and generate an inspection result through the processor; The cleaning robot includes: a main body, a driving module, an information sensing module, an occlusion module, a signal transmission module, and a cleaning module. The driving module is arranged under the main body and drives the main body to move on the solar panel. The central control unit is connected to the cleaning robot through the signal transmission module, enabling it to clean the solar panel through the cleaning module, gradually occlude the solar panel through the occlusion module and conduct inspections during the process, and obtain inspection data through the information sensing module.

[0013] Wherein, the cleaning module is a rotary brush installed on both sides of the main body, and the rotary brush can be driven by a cleaning motor and clean the solar panel during operation.

[0014] Wherein, the occlusion module includes baffle plates, rotating shafts, and occlusion driving devices connected to both sides of the main body. The baffle plates are rotatably installed on both sides of the main body, and the occlusion driving device can drive the rotating shafts to flip the baffle plates.

[0015] Wherein, the information sensing module includes: an inspection component: including a visual capture device and an infrared imaging device; an environmental monitoring component: including a light intensity sensor and a temperature sensor; a cleaning robot attitude monitoring component: including a Hall sensor and a laser edge detection sensor.

[0016] Wherein, the driving module includes: a driving motor, a driving chain, a rotating wheel, and a traveling track. The driving motor is connected to the rotating wheel through the driving chain, and the traveling track is sleeved outside the rotating wheel and can be driven by the rotating wheel.

[0017] Implementing the embodiments of the present invention has the following beneficial effects: ① This solution adopts a scheme of first cleaning and then occluding for inspection to achieve the maintenance and inspection of solar panels. Compared with the traditional method of visual inspection by drones, it realizes the reverse monitoring of the condition of solar panels by using the power generation efficiency change rate, thereby making the inspection more accurate. At the same time, it also avoids the problem that the power generation efficiency of some solar panels decreases due to invisible aging or internal circuit losses but cannot be detected. ② This solution realizes the power generation monitoring, cleaning, and inspection of solar panels through three terminals: an inverter system, a central controller, and a cleaning robot, reducing the use of manpower and improving the efficiency and safety of inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a block diagram of the steps of the solar panel inspection and cleaning method of the present invention; Figure 2 is a schematic diagram of the division of the unit area and grid of the solar panel of the present invention; Figure 3 is a schematic block diagram of the solar panel inspection and cleaning system of the present invention; Figure 4 is a schematic diagram of the cleaning robot of the present invention; Figure 5 is a schematic diagram of the shielding module of the cleaning robot of the present invention; Figure 6 is a schematic diagram of the internal split structure of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Embodiment 1 As Figure 1 , Figure 2 shown, a self-shielding solar panel inspection and cleaning method includes the following steps: Step S1: Divide the solar panel into several unit areas with the same area, and further divide each area into several grids, and obtain an estimated value of the power generation of the unit area.

[0021] Step S2: The cleaning robot moves to the unit area for cleaning. After the cleaning is completed, the shielding plate is unfolded, and each grid of the unit area is gradually shielded.

[0022] Step S3: Obtain the power generation of the unit area after shielding, and calculate it in combination with the estimated value of the power generation of the unit area in Step S1 to obtain the efficiency change rate.

[0023] Step S4: When the efficiency change rate in Step S3 is greater than the preset threshold, the cleaning robot moves to other grids, and Steps S2 and S3 are repeated until the inspection and cleaning of the solar panel are completed.

[0024] When the ratio of the power generation of the unit area after shielding to the estimated value of the power generation of the unit area in Step S1 is less than the preset threshold, mark this grid. At the same time, the cleaning robot enters the troubleshooting program. After the troubleshooting program is completed, the cleaning robot moves to other grids, and Steps S2 and S3 are repeated until the inspection and cleaning of the solar panel are completed.

[0025] As Figure 2 shown, the said Step S1 includes: Step S11: Collect the power generation data of each unit area and divide the power generation cycle according to the light intensity.

[0026] Step S12: Record the power generation amount of each unit area during the power generation cycle, merge the power generation amounts of the power generation cycles with the same light intensity, calculate the average value, and regard this average value as the estimated value of the power generation amount of the unit area at this light intensity.

[0027] Generally speaking, in step S11, at least the power generation data of the unit area within one month should be collected. At the same time, according to the time period division of each day, the power generation amounts of the power generation cycles with the light intensity and the sunshine angle within a close range are classified and counted, and the average value of multiple groups of data is used as the estimated value of the power generation amount of the unit area corresponding to this light intensity and sunshine angle. It should be added that the solar power generation system is generally composed of multiple solar panels with the same length, width and height. And the unit area in this solution generally refers to a fixed number of solar panels, such as eight or ten solar panels. The grid refers to a single solar panel. Therefore, when there is occlusion, one solar panel within the unit area will be completely occluded, and then the condition of this solar panel will be monitored through the efficiency change rate.

[0028] Specifically, the calculation formula of the efficiency change rate in step S3 is as follows:

[0029] Among them, E is the efficiency change rate, P 测 is the power generation amount of the unit area obtained in step S3, P 估 is the estimated value of the power generation amount of the unit area obtained in step S1, S 区 is the area of the unit area, S 网 is the area of the grid.

[0030] Take Figure 2 as an example. Suppose eight solar panels are used as a unit area, then one solar panel is a grid. Retrieve the power generation amount of the power generation cycle closest to the current light intensity in the inverter system, and regard the average value of this part of the power generation amount as the estimated value. Then the P 估 in the numerator part minus P 测 can be regarded as the actual power generation amount of the occluded solar panel. And the P 估 in the denominator part multiplied by the ratio of the grid area to the unit area is used as the estimated power generation amount of this occluded solar panel. The ratio of the actual power generation amount to the estimated power generation amount is used as the efficiency change rate. When this efficiency change rate is lower than the threshold, assuming the threshold is ninety percent, then mark this grid and at the same time perform the troubleshooting procedure of step S4.

[0031] Specifically, the troubleshooting program in step S4 includes the following steps: Step S41: Perform visual capture and infrared imaging detection to check if there are visible faults in the solar panels within the grid; After the inspection, record all visible faults found within the grid and upload them.

[0032] Embodiment 2 This embodiment mainly discloses a self - occluding solar panel inspection and cleaning system for implementing the above - mentioned Embodiment 1, as Figure 3 shown, including: an inverter system 1, a central control unit 2, and a cleaning robot 3; The inverter system 1 is connected to each unit area of the solar panel and can obtain the power generation of each unit area; The central control unit 2 includes a processor and a memory. The processor is used to control the connection of the cleaning robot 3, and the memory is used to receive the power generation data obtained by the inverter system 1 and the inspection data of the cleaning robot 3 to generate an inspection result.

[0033] The inspection result includes the following information: Inspection condition information, including: the position of the solar panel grid for inspection, the inspection time, the corresponding environmental light intensity during inspection, and the surface temperature of the solar panel; Visualized abnormal logs, including: the number of surface damages of the solar panel that can be visually captured and the corresponding damage conditions, and also including the thermal imaging map obtained by the infrared imaging device.

[0034] As Figure 4 、 Figure 5 、 Figure 6 shown, the cleaning robot 3 includes: a main body 31, a driving module 32, an information sensing module 33, an occlusion module 34, a signal transmission module 35, and a cleaning module 36; The driving module 32 is arranged below the main body 31 and drives the main body 31 to move on the solar panel. The central control unit 2 controls the connection of the cleaning robot 3 through the signal transmission module 35, enables it to clean the solar panel through the cleaning module 36, and gradually occludes the solar panel through the occlusion module 34 and performs inspection through the information sensing module 33 during the process.

[0035] As Figure 5As shown, the shielding module 34 includes shielding plates 341, rotating shafts 342, and a shielding driving device connected to both sides of the main body. The shielding plates 341 are rotatably installed on both sides of the main body 31, and the shielding driving device can drive the rotating shafts 342 to flip the shielding plates 341, so that the shielding plates 341 can completely cover the grid until a power generation cycle is completed.

[0036] Of course, the structure of the above shielding module 34 is not unique. It can also be a shielding structure implemented by means such as an umbrella structure or a rolling curtain structure. Such conventional structures should be considered easy to think of by those skilled in the art. The key point that this solution wants to protect is not the shielding module, but to form an inspection plan by using the data collected by the cleaning robot and the inverter system and the form of self-shielding. Therefore, any solution for implementing a shielding plan for conventional replacement should fall within the protection scope of this application.

[0037] As Figure 5 shown, each component of the information sensing module 33 is connected to the central control unit 2 through the signal transmission system 35. The signal sensing module 33 includes: Inspection component: including a visual capture device 331 and an infrared imaging device. The inspection component is used to implement the troubleshooting procedure in step S4, and can upload the scanned faults to the central control unit through the signal transmission module, and then generate the final inspection result. Please refer to Figure 5 , the visual capture device 331 is a camera, which is installed at the lower part of the main body 31 and is used for visual capture of the solar panels.

[0038] It should be noted that visually capturing the surface damage of the solar panels through a camera and detecting whether the solar panels have abnormal heating through infrared thermal imaging scanning are two conventional inspection methods in this field, and will not be repeated here.

[0039] Environmental monitoring component: including a light intensity sensor and a temperature sensor 332. The light intensity sensor and the temperature sensor are used to monitor the light intensity and temperature during inspection, and can correspond to the power generation data recorded in the inverter system, so that the inverter system 1 can retrieve the power generation cycle closest to the light intensity during its inspection, and use the average value of the power generation of this part of the power generation cycle as an estimated value. Cleaning robot attitude monitoring component: including a Hall sensor and a laser edge detection sensor 333. The Hall sensor is used to sense the magnetic field change of the drive motor to achieve precise control of the drive motor, while the laser edge detection sensor 333 is installed at the edge position of the main body to sense the edge of the solar panel and control the walking path of the robot.

[0040] Please refer to Figure 6 The cleaning module 36 is a roller brush installed on both sides of the main body. The roller brush can be driven by a cleaning motor and clean the solar panel during operation.

[0041] The driving module 32 includes: a driving motor 321, a driving chain 322, a rotating wheel 323 and a walking track. The driving motor 321 is connected to the rotating wheel 323 through the driving chain 322, and the walking track is sleeved on the outside of the rotating wheel 323 and can be driven by the rotating wheel 323.

[0042] Of course, the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any modifications made according to the spirit of the main technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-blocking solar panel inspection and cleaning method, characterized in that, It includes the following steps: Step S1: Divide the solar panel into several unit areas with the same area, further divide each area into several grids, and obtain the estimated power generation value of each unit area; Step S2: The cleaning robot moves to the unit area for cleaning. After the cleaning is completed, the baffle is unfolded, and each grid of the unit area is gradually blocked; Step S3: Obtain the power generation of the blocked unit area, calculate it in combination with the estimated power generation value of the unit area in Step S1, and obtain the efficiency change rate; Step S4: When the efficiency change rate in Step S3 is greater than the preset threshold, the cleaning robot moves to other grids, and Steps S2 and S3 are repeated until the cleaning and inspection of the solar panel are completed; When the ratio of the power generation of the blocked unit area to the estimated power generation value of the unit area in Step S1 is less than the preset threshold, mark the grid. At the same time, the cleaning robot enters the troubleshooting program. After the troubleshooting program is completed, the cleaning robot moves to other grids, and Steps S2 and S3 are repeated until the cleaning and inspection of the solar panel are completed.

2. The self-blocking type solar panel inspection and cleaning method according to claim 1, wherein The said Step S1 includes: Step S11: Collect the power generation data of each unit area, and divide the power generation cycle according to the light intensity; Step S12: Record the power generation of each unit area during the power generation cycle, merge the power generation of the power generation cycles with the same light intensity, calculate the average value, and regard this average value as the estimated power generation value of the unit area under this light intensity in this unit area.

3. The self-shielding solar panel inspection and cleaning method according to claim 1, wherein, The blocked area in Step S2 is the same as the grid area.

4. The self-blocking type solar panel inspection and cleaning method according to claim 1, wherein, The formula for calculating the efficiency change rate in Step S3 is as follows: Among them, E is the efficiency change rate, and P 测 is the power generation per unit area obtained in step S3, and P 估 is the estimated value of the power generation per unit area obtained in step S1, S 区 is the area of the unit area, and S 网 is the area of the grid.

5. A self-blocking solar panel inspection and cleaning method according to claim 1, characterized in that, The troubleshooting program in Step S4 includes the following steps: Step S41: Perform visual capture and infrared imaging detection to check whether there are visible faults in the grid of the solar panel; Step S42: After the inspection is completed, record all the visible faults found in the grid and upload them.

6. A system for the self-blocking type solar panel inspection and cleaning method according to any one of claims 1-5, characterized in that, It includes: Inverter system (1), central control unit (2), cleaning robot (3); The inverter system (1) is connected to each unit area of the solar panel and can obtain the power generation of each unit area; The central control unit (2) includes: a processor and a memory. The processor is used to control and connect the cleaning robot (3), and the memory is used to receive the power generation data obtained by the inverter system (1) and the inspection data of the cleaning robot (3), and generate an inspection result; The cleaning robot (3) includes: a main body (31), a driving module (32), an information sensing module (33), a blocking module (34), a signal transmission module (35), a cleaning module (36), The driving module (32) is arranged below the main body (31) and drives the main body (31) to move on the solar panel. The central control unit (2) is connected to the cleaning robot (3) through the signal transmission module (35), and enables it to clean the solar panel through the cleaning module (36), and gradually block the solar panel through the blocking module (34) and perform inspection through the information sensing module (33) during the process.

7. The system of a self-blocking solar panel inspection and cleaning method according to claim 6, characterized in that, The information sensing module (33) includes: Inspection component: comprising a visual capture device (331) and an infrared imaging device, wherein the visual capture device is used to perform visual capture of the solar panel, and the infrared imaging device is used to perform infrared thermal imaging scanning of the sun; Environmental monitoring component: comprising a light intensity sensor and a temperature sensor (332), the environmental monitoring component is used to obtain the external light intensity and the surface temperature of the solar panel during inspection; A cleaning robot posture monitoring component comprises a Hall sensor and a laser edge detection sensor (333), wherein the Hall sensor is used to sense changes in the magnetic field of a drive motor, thereby achieving precise control of the drive motor, and the laser edge detection sensor (333) is used to feedback the position of the cleaning robot.

8. The system of a self-blocking solar panel inspection and cleaning method according to claim 7, characterized in that The shielding module (34) comprises shielding plates (341) connected to both sides of the main body, a rotating shaft (342), and a shielding driving device; the shielding plates (341) are rotatably mounted on both sides of the main body (31), and the shielding driving device can drive the rotating shaft (342) to flip the shielding plates (341).

9. The system of a self-blocking solar panel inspection and cleaning method according to claim 7, characterized in that, The cleaning module (36) is a roller brush installed on both sides of the main body, and the roller brush can be driven by a cleaning motor and clean the solar panel when in operation.

10. The system of a self-blocking solar panel inspection and cleaning method according to claim 7, wherein, The driving module (32) comprises: a driving motor (321), a driving chain (322), a rotating wheel (323) and a walking track; The driving motor (321) is connected to the rotating wheel (323) through a driving chain (322), and the walking track is sleeved on the outside of the rotating wheel (323) and can be driven by the rotating wheel (323).

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