System for detecting surface cleanliness of photovoltaic module in real time

Abstract

The utility model relates to the technical field of photovoltaic panel maintenance, in particular to a photovoltaic module surface cleanliness real-time detection system which comprises a detection supporting column, an atmospheric visibility detection device and a detection supporting rod which are arranged in a photovoltaic station, and the atmospheric visibility detection device is installed at the high position of the photovoltaic station through the detection supporting column. The air visibility of the photovoltaic station is detected, so that the accumulation amount of dust on the photovoltaic panel is determined according to the air visibility, manual field inspection is avoided, and the operation intensity is reduced; meanwhile, all-weather real-time detection can be achieved, it is guaranteed that detection is timely and reliable while the working efficiency is improved, and the actual detection requirement is met; and the overall structure is simple, low in cost and small in size, and does not cause obvious influence on power generation of the photovoltaic panel.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic panel maintenance technology, specifically to a real-time detection system for the surface cleanliness of photovoltaic modules. Background Technology

[0002] Solar energy, as a clean energy source with advantages such as abundant reserves, clean and sustainable nature, and low cost per kilowatt-hour, is an important part of my country's efforts to build a new power system and achieve dual-carbon goals.

[0003] Photovoltaic panels are usually installed in remote locations with no obstructions. Due to the influence of the site environment, photovoltaic modules in the southwest region are easily contaminated by factors such as soil dust, bird droppings, and water stains, which seriously affect the cleanliness of the photovoltaic modules and thus the power generation efficiency of the photovoltaic power station.

[0004] Furthermore, severe bird droppings contamination can cause hot spots on photovoltaic modules, affecting their lifespan and the fire safety of the photovoltaic power station. Currently, the main method for detecting the cleanliness of photovoltaic modules relies on regular inspections by site maintenance personnel, but the inspection scope is limited. Additionally, drone inspection systems deployed at the site can be used, but drone inspections have a limited inspection cycle, making it impossible to monitor the cleanliness of the photovoltaic modules in a timely manner.

[0005] Although Chinese utility model patent application number 202422231701.8 provides a photovoltaic panel cleanliness tester for detecting the cleanliness of photovoltaic panels, the existing equipment has a complex structure, is not easy to maintain, has a limited detection range, requires the deployment of multiple units, increases costs, and cannot meet actual testing needs. Utility Model Content

[0006] The purpose of this invention is to provide a real-time detection system for the surface cleanliness of photovoltaic modules, thereby solving the technical problem of low efficiency in current tunnel support quality inspection operations.

[0007] The solution of this utility model to the above-mentioned technical problems is as follows:

[0008] A real-time surface cleanliness detection system for photovoltaic modules includes a detection support column, an atmospheric visibility detection device, and a detection support rod installed at a photovoltaic power station. One end of the detection support rod is connected to the detection support column, and the other end of the detection support rod is connected to the atmospheric visibility detection device, which is located outside the detection support column.

[0009] Furthermore, the real-time surface cleanliness detection system for photovoltaic modules also includes a stain detection device, which is connected to the top of the detection support rod and is located above the atmospheric visibility detection device.

[0010] Further specifying, the atmospheric visibility detection device includes a light source emitting unit, a light source receiving unit, and a wiring unit. The light source emitting unit and the light source receiving unit are both connected to the detection support column via a detection support rod. The light source emitting unit and the light source receiving unit are arranged opposite to each other. The wiring unit is connected to the detection support column. The light source emitting unit and the light source receiving unit are both signal connected to the wiring unit.

[0011] Furthermore, the detection support rod is detachably connected to the detection support column.

[0012] Further specified, one end of the detection support rod is provided with a U-shaped groove, and the other end of the detection support rod is rotatably connected to the atmospheric visibility detection device; a first limiting hole is provided on the U-shaped groove, and a second limiting hole is provided on the detection support column; the U-shaped groove is sleeved on the outside of the detection support column, and the second limiting hole is coaxially arranged with the first limiting hole.

[0013] Further specifying, the detection support column is provided with a reinforcing support rod, one end of which is connected to the detection support column, and the other end of which is located below the atmospheric visibility detection device and connected to the detection support column.

[0014] Further specifying, the atmospheric visibility detection device is model RS-NJD-*-1.

[0015] Further specifying, the stain detection device includes an image acquisition unit and a stain recognition unit, the image acquisition unit being signal-connected to the stain recognition unit, and the image acquisition unit being positioned above the detection support rod.

[0016] Furthermore, the image acquisition unit is a gimbal camera or a PTZ camera.

[0017] Furthermore, the top of the detection support column is provided with a connecting bracket, and the image acquisition unit is rotatably connected to the detection support column through the connecting bracket.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model enables the detection of atmospheric visibility at photovoltaic power plants by installing an atmospheric visibility detection device at a high position through a detection support column. This allows for the determination of the amount of dust accumulation on the photovoltaic panels based on the atmospheric visibility, avoiding manual on-site inspections and reducing workload. Simultaneously, it enables real-time detection in all weather conditions, improving work efficiency while ensuring timely and reliable detection to meet actual testing needs. Furthermore, the overall structure is simple, low-cost, and small in size, and will not significantly affect the power generation of the photovoltaic panels.

[0020] 2. This utility model improves the accuracy and reliability of detecting the cleanliness of photovoltaic panels by setting up a stain detection device and using visual recognition to identify stains on the photovoltaic panels. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the real-time surface cleanliness detection system for photovoltaic modules of this utility model;

[0022] Figure 2 This is a schematic diagram of the installation structure of the detection support column and the atmospheric visibility detection device of this utility model;

[0023] In the diagram, 10-detection support column; 20-atmospheric visibility detection device; 21-light source emitting unit; 22-light source receiving unit; 23-wiring unit; 30-detection support rod; 31-U-shaped slot; 32-first limiting hole; 33-reinforcing support rod; 40-image acquisition unit; 41-connecting bracket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] Example 1

[0026] refer to Figure 1 and Figure 2 This utility model provides a real-time detection system for the surface cleanliness of photovoltaic modules, including a detection support column 10, an atmospheric visibility detection device 20, and a detection support rod 30. The detection support column 10 is vertically installed in the photovoltaic power station. The atmospheric visibility detection device 20 is connected to the detection support column 10 through the detection support rod 30. The atmospheric visibility detection device 20 is positioned outside the detection support column 10 through the detection support rod 30 to ensure that there is no obstruction below the atmospheric visibility detection device 20, thereby ensuring the detection reliability and accuracy of the atmospheric visibility detection device 20.

[0027] The atmospheric visibility detection device 20 is used to detect the atmospheric visibility of the photovoltaic power station, thereby realizing the detection of the cleanliness of the photovoltaic panels.

[0028] To further explain, the atmospheric visibility detection device 20 includes a light source emitting unit 21, a light source receiving unit 22, and a wiring unit 23. The wiring unit 23 is connected to the detection support column 10. Both the light source emitting unit 21 and the light source receiving unit 22 are detachably connected to the detection support column 10 via a detection support rod 30. Both the light source emitting unit 21 and the light source receiving unit 22 are located outside the detection support column 10, and the light source emitting unit 21 and the light source receiving unit 22 are arranged opposite to each other. Both the light source emitting unit 21 and the light source receiving unit 22 are signal connected to the wiring unit 23. The light source emitting unit 21 and the light source receiving unit 22 can be optionally arranged above or below the wiring unit 23. Taking the example where both the light source emitting unit 21 and the light source receiving unit 22 are arranged above the wiring unit 23, the following explanation will be provided.

[0029] During installation, both the light source emitting unit 21 and the light source receiving unit 22 are deflected downwards in the horizontal direction, with a deflection angle of A.

[0030] The wiring unit 23 is used to obtain the current atmospheric visibility value (PM) and send the atmospheric visibility value (PM) to the display terminal for staff to view.

[0031] Specifically, let Ni be the amount of dust accumulated on the surface of the photovoltaic panel on day i. Then, staff can calculate the dust accumulation on the photovoltaic panel that day using the formula Ni = (A * K * L * PM)%. It can obtain the amount of dust accumulation on the surface of the photovoltaic panel on day m, thereby enabling real-time detection of the surface cleanliness of the photovoltaic panel and meeting actual detection needs; where K is the climate coefficient and L is the regional coefficient.

[0032] For dry and windy climates, the K value is relatively high, ranging from (0.7 to 1.0], such as desert and Gobi regions, where sandstorms are frequent and dust accumulates quickly. For semi-arid climates, the K value is moderate, ranging from (0.4 to 0.7], such as grassland regions, where precipitation is low but winds are strong. For humid climates, the K value is relatively low, ranging from [0.1 to 0.4], such as coastal areas and areas with abundant rainfall, where precipitation can effectively remove some dust.

[0033] For industrial / mining areas, the L value is relatively high, ranging from (0.7 to 1.0], indicating severe air pollution and multiple sources of dust. For agricultural areas, the L value is moderate, ranging from (0.4 to 0.7], indicating that dust near farmland may come from soil, crops, etc. For residential / suburban areas, the L value is relatively low, ranging from [0.1 to 0.4], indicating relatively clean air.

[0034] To further explain, in order to meet actual usage needs, operators can statistically analyze the impact of different rainfall amounts (D) on the washing away of dust on photovoltaic panels, thereby obtaining the ineffective value D1 and the effective value D2 for dust washing away. That is, when the rainfall is less than D1, the amount of dust accumulated on the photovoltaic panel remains unchanged; if the rainfall is greater than D2, the dust accumulated on the photovoltaic panel is cleared, and the staff can re-test the surface cleanliness of the photovoltaic panel after the rainfall ends; if the actual rainfall is between the rainfall amounts D1 and D2, the percentage of dust accumulation on the photovoltaic panel after the rainfall can be determined based on empirical values, and the surface cleanliness of the photovoltaic panel can be tested again based on the updated dust accumulation amount to meet actual testing requirements.

[0035] To further explain, for ease of installation and disassembly, the bottom end of the detection support rod 30 is preferably provided with a U-shaped groove 31. The bottom end of the detection support rod 30 is sleeved on the outside of the detection support column 10 through the U-shaped groove 31. A first limiting hole 32 is opened on the U-shaped groove 31, and a second limiting hole is opened on the detection support column 10. When the U-shaped groove 31 is sleeved on the detection support column 10, the first limiting hole 32 and the second limiting hole are coaxially arranged. At this time, the limiting shaft can be simultaneously set in the first limiting hole 32 and the second limiting hole in the horizontal direction to realize the quick assembly and disassembly of the detection support rod 30 and the detection support column 10.

[0036] There are two detection support rods 30. The bottom ends of the two detection support rods 30 can be set on the left and right sides of the detection support column 10, or on the top and bottom sides of the detection support column 10. Alternatively, the U-shaped groove 31 at the bottom end of one detection support rod 30 can be fitted onto the outside of the U-shaped groove 31 at the bottom end of the other detection support rod 30. Thus, the connection between the two detection support rods 30 and the detection support column 10 is achieved through a limiting shaft, ensuring that the connection of the detection support rods 30 is stable and reliable.

[0037] To further improve the installation stability of the light source emitting unit 21 and the light source receiving unit 22, it is preferable to also provide a reinforcing support rod 33 on the detection support column 10. The bottom end of the reinforcing support rod 33 is connected to the detection support column 10, and the top end of the reinforcing support rod 33 is connected to the top end of the detection support rod 30, thereby enhancing the structural reliability of the detection support rod 30.

[0038] To further improve the reliability of the surface cleanliness detection of photovoltaic panels, it is preferable to also install a stain detection device on the detection support column 10. The stain detection device is used to visually identify whether there are stains on the surface of the photovoltaic panel.

[0039] Specifically, the stain detection device includes an image acquisition unit 40 and a stain recognition unit connected to the image acquisition unit 40 by signal. The image acquisition unit 40 can be a pan-tilt camera or a PTZ camera. The image acquisition unit 40 faces the photovoltaic panel below and is used to acquire images of the surface of the photovoltaic panel below. The image acquisition unit 40 sends the acquired images of the photovoltaic panel surface to the stain recognition unit, which is used to receive and display the images of the photovoltaic panel surface acquired by the image acquisition unit 40.

[0040] The stain recognition unit converts the collected photovoltaic panel surface image to grayscale and sets grayscale thresholds for different types of stains (such as bird droppings and fallen leaves). By comparing the grayscale value of the photovoltaic panel area in the collected photovoltaic panel surface image with the set thresholds, it achieves remote real-time automatic cleanliness detection, further improving the accuracy and reliability of photovoltaic panel surface cleanliness detection.

[0041] Alternatively, operators can obtain information about the presence of stains and the cleanliness of the photovoltaic panel surface by observing the image displayed on the stain recognition unit.

[0042] Both the atmospheric visibility detection device 20 and the stain detection device can be commercially available products. For example, the atmospheric visibility detection device 20 can be the RS-NJD-*-1 model atmospheric visibility measuring instrument from Jian Da Ren Ke.

[0043] To further explain, in order to detect the surface cleanliness of photovoltaic panels in photovoltaic power plants, multiple image acquisition units 40 can be set on the detection support column 10 to acquire images of the photovoltaic panel surface from different directions, thereby increasing the detection range, reducing the number of photovoltaic module surface cleanliness detection systems deployed, and lowering costs.

[0044] At this time, the image acquisition unit 40 can be selected as a pan-tilt camera or a PTZ camera to realize the detection of different photovoltaic areas. Taking the pan-tilt camera as an example, the image acquisition unit 40 is rotatably connected to the detection support column 10 through the connecting bracket 41. By rotating the pan-tilt, the image acquisition unit 40 can realize the acquisition of images of the photovoltaic panel surface from different directions.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A real-time detection system for the surface cleanliness of photovoltaic modules, characterized in that, It includes a detection support column (10), an atmospheric visibility detection device (20), and a detection support rod (30) installed at the photovoltaic power station. One end of the detection support rod (30) is connected to the detection support column (10), and the other end of the detection support rod (30) is connected to the atmospheric visibility detection device (20). The atmospheric visibility detection device (20) is located outside the detection support column (10).

2. The real-time surface cleanliness detection system for photovoltaic modules according to claim 1, characterized in that, The real-time surface cleanliness detection system for photovoltaic modules also includes a stain detection device, which is connected to the top of the detection support rod (30) and is located above the atmospheric visibility detection device (20).

3. The real-time surface cleanliness detection system for photovoltaic modules according to claim 1 or 2, characterized in that, The atmospheric visibility detection device (20) includes a light source emitting unit (21), a light source receiving unit (22), and a wiring unit (23). The light source emitting unit (21) and the light source receiving unit (22) are both connected to the detection support column (10) through the detection support rod (30). The light source emitting unit (21) and the light source receiving unit (22) are arranged opposite to each other. The wiring unit (23) is connected to the detection support column (10). The light source emitting unit (21) and the light source receiving unit (22) are both signal connected to the wiring unit (23).

4. The real-time surface cleanliness detection system for photovoltaic modules according to claim 1 or 2, characterized in that, The detection support rod (30) is detachably connected to the detection support column (10).

5. The real-time surface cleanliness detection system for photovoltaic modules according to claim 4, characterized in that, One end of the detection support rod (30) is provided with a U-shaped groove (31), and the other end of the detection support rod (30) is rotatably connected to the atmospheric visibility detection device (20); a first limiting hole (32) is provided on the U-shaped groove (31), and a second limiting hole is provided on the detection support column (10). The U-shaped groove (31) is sleeved on the outside of the detection support column (10), and the second limiting hole and the first limiting hole (32) are coaxially arranged.

6. The real-time surface cleanliness detection system for photovoltaic modules according to claim 5, characterized in that, A reinforcing support rod (33) is provided on the detection support column (10). One end of the reinforcing support rod (33) is connected to the detection support column (10), and the other end of the reinforcing support rod (33) is located below the atmospheric visibility detection device (20). The other end of the reinforcing support rod (33) is connected to the detection support rod (30).

7. The real-time surface cleanliness detection system for photovoltaic modules according to claim 1 or 2, characterized in that, The atmospheric visibility detection device (20) is model RS-NJD-*-1.

8. The real-time surface cleanliness detection system for photovoltaic modules according to claim 2, characterized in that, The stain detection device includes an image acquisition unit (40) and a stain recognition unit. The image acquisition unit (40) is signal-connected to the stain recognition unit and is positioned above the detection support rod (30).

9. The real-time surface cleanliness detection system for photovoltaic modules according to claim 8, characterized in that, The image acquisition unit (40) is a gimbal camera or a PTZ camera.

10. The real-time surface cleanliness detection system for photovoltaic modules according to claim 8, characterized in that, The top of the detection support column (10) is provided with a connecting bracket (41), and the image acquisition unit (40) is rotatably connected to the detection support column (10) through the connecting bracket (41).

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