Annular Rotating Photovoltaic Power Generation System and Working Method for Shadow Occlusion Area

Abstract

The present invention provides an annular rotating photovoltaic power generation system and method for a shadow occlusion area, comprising: an electrically driven bearing chassis disposed around a shadow generating object, a first slide rail and a second slide rail. Sliding members are provided at both the inner bottom and the outer bottom of the bearing chassis. The sliding member at the inner bottom of the bearing chassis is slidably connected to the first slide rail, and the sliding member at the outer bottom of the bearing chassis is slidably connected to the second slide rail; a photovoltaic module array is provided on the bearing chassis, and the photovoltaic module array is provided with a notch for cooperating with the shadow area. A plurality of photosensitive elements are sequentially provided at the edge position of the notch of the photovoltaic module array. When the light intensity decrease amount of more than a first preset number of photosensitive elements exceeds a preset value, the bearing chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position again; The present invention makes the most of the land, avoids the shadow occlusion area, improves the land utilization rate, and improves the overall power generation efficiency of the photovoltaic power generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and particularly relates to an annular rotating photovoltaic power generation system and a working method for a shadow occlusion area. Background Art

[0002] The statements in this part merely provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] In existing photovoltaic power generation projects, when arranging photovoltaic panels, it is generally necessary to avoid areas where the photovoltaic modules are shaded during the time period from 9:00 to 15:00. For relatively tall structures such as transmission line towers, communication base stations, cylindrical / tower-shaped buildings, etc., the shadow occlusion range is relatively large, but the occlusion area rotates with the change of the sun's irradiation angle. If no photovoltaic modules are arranged in this area, the number of photovoltaic modules will be greatly reduced, the power generation of the system will be reduced, and resource waste will be caused; at the same time, due to the relatively tight land for panel arrangement at present, it is often necessary to arrange panels near existing relatively tall structures such as transmission line towers, communication base stations, cylindrical / tower-shaped buildings, etc.

[0004] Patent No. CN110620545A discloses a photovoltaic module sliding device and a sliding method for avoiding the shadow of an occlusion object, which only makes simple sliding adjustments of each module according to the shadow situation of the photovoltaic modules, and cannot achieve the overall control of avoiding shadows for the entire photovoltaic power generation system; when the height of the shadow generator (such as a transmission line tower, a communication base station, a cylindrical / tower-shaped building, etc.) is relatively high, adjusting each photovoltaic module separately is cumbersome and often unable to achieve the goal of effectively avoiding shadows for the entire photovoltaic system. Summary of the Invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides an annular rotating photovoltaic power generation system and a working method for a shadow occlusion area, which makes the most of the land, avoids the shadow occlusion area, improves the land utilization rate, and improves the overall power generation efficiency of the photovoltaic power generation system.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention provides an annular rotating photovoltaic power generation system for a shadow occlusion area.

[0008] An annular rotating photovoltaic power generation system for a shadow occlusion area includes: an electrically driven carrier chassis arranged around the shadow generating object and a first slide rail and a second slide rail arranged around the shadow generating object. Sliding members are provided at both the inner bottom and the outer bottom of the carrier chassis. The sliding member at the inner bottom of the carrier chassis is slidably connected to the first slide rail, and the sliding member at the outer bottom of the carrier chassis is slidably connected to the second slide rail;

[0009] The load chassis is provided with a photovoltaic module array, and the photovoltaic module array is provided with a notch for cooperating with the shadow area. A plurality of photosensitive elements are sequentially arranged at the edge position of the notch of the photovoltaic module array. When the light intensity decrease amount of more than the first preset number of photosensitive elements exceeds the preset value, the load chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position again.

[0010] As an optional implementation manner, the photosensitive elements are sequentially arranged at equal intervals at the notch position of the photovoltaic array.

[0011] As an optional implementation manner, until the shadow area falls back into the notch position again, it includes:

[0012] The light intensity of less than the second preset number of photosensitive elements is less than the preset value.

[0013] Furthermore, continuously perform rotational adjustment of the load chassis until the number of photosensitive elements with light intensity less than the preset value is the least.

[0014] As an optional implementation manner, each photovoltaic module of the photovoltaic array is connected to a support rod through a rotating mechanism, and the support rod is fixedly connected to the load chassis. After the load chassis rotates, the photosensitive elements corresponding to each photovoltaic module detect the light intensity, and the photovoltaic module rotates according to the magnitude of the light intensity to achieve the optimal inclination angle.

[0015] As an optional implementation manner, according to the solar angle, the height and width dimensions of the building structure for consecutive days, calculate the average value of the shadow area, and obtain the notch size according to the average value of the shadow area.

[0016] As an optional implementation manner, the load chassis rotates clockwise or counterclockwise along the first slide rail and the second slide rail.

[0017] As an optional implementation manner, after a plurality of photovoltaic modules are connected in series, they are connected to the inverter system through a slip ring at the center position of the load chassis.

[0018] As an optional implementation manner, a spraying device for cleaning the photovoltaic modules is arranged above the photovoltaic array.

[0019] As an optional implementation manner, it further includes an electrochemical energy storage system, which provides power for the load chassis in the evening when the photovoltaic power generation decreases so that the load chassis returns to the starting position.

[0020] The second aspect of the present invention provides a working method of a ring-rotating photovoltaic power generation system for a shadow occlusion area.

[0021] A working method of a ring-rotating photovoltaic power generation system in a shadow occlusion area, using the ring-rotating photovoltaic power generation system in the shadow occlusion area described in the first aspect of the present invention, includes the following processes:

[0022] Set the initial position of the bearing chassis;

[0023] After reaching the first preset moment, the rotation of the bearing chassis is started;

[0024] Monitor the photosensitive intensity of each photosensitive element in real time. When the decrease in the photosensitive intensity of more than the first preset number of photosensitive elements exceeds the preset value, the bearing chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position again;

[0025] After reaching the second preset moment, the bearing chassis returns to the initial position along the original path, and judges whether the weather is rainy through the photosensitive element. In rainy weather, the bearing chassis stops rotating.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The ring-rotating photovoltaic power generation system and working method in the shadow occlusion area described in the present invention make the most of the land, avoid the shadow occlusion area, improve the land utilization rate, and improve the overall power generation efficiency of the photovoltaic power generation system.

[0028] 2. The ring-rotating photovoltaic power generation system and working method in the shadow occlusion area described in the present invention are successively provided with a plurality of photosensitive elements at the notch edge position of the photovoltaic module array. When the decrease in the photosensitive intensity of more than the first preset number of photosensitive elements exceeds the preset value, the bearing chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position again. By rotating the bearing chassis, it is ensured that the negative area falls into the notch position to the greatest extent, greatly improving the light utilization rate, and thus increasing the total daily power generation.

[0029] 3. The ring-rotating photovoltaic power generation system and working method in the shadow occlusion area described in the present invention, the photosensitive elements are arranged at equal intervals in turn at the notch position of the photovoltaic array. The condition for the shadow area to fall back into the notch position again is that the photosensitive intensity of less than the second preset number of photosensitive elements is less than the preset value. Continuously rotate and adjust the bearing chassis until the number of photosensitive elements with light intensity less than the preset value is the least, realizing the extreme application of light and avoiding the waste of light.

[0030] 4. The ring-rotating photovoltaic power generation system and working method in the shadow occlusion area described in the present invention calculate the average value of the shadow area according to the solar angle and the height and width dimensions of the building and structure for consecutive days, and obtain the notch size according to the average value of the shadow area, which can ensure that the shadow area effectively falls into the notch position.

[0031] 5. The annular rotating photovoltaic power generation system and working method for the shadow occlusion area according to the present invention, a spraying device for cleaning photovoltaic modules is arranged above the photovoltaic array; it further includes an electrochemical energy storage system, which provides power for the bearing chassis in the evening when the photovoltaic power generation decreases so that the bearing chassis returns to the starting position, improving the autonomous operation ability of the photovoltaic system and further increasing the daily power generation.

[0032] Advantages of additional aspects of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0034] Figure 1 It is a plan view of the photovoltaic power generation system at 12:00 provided for an embodiment of the present invention.

[0035] Figure 2 It is a cross-sectional view of the photovoltaic system provided for an embodiment of the present invention.

[0036] Figure 3 It is a plan layout diagram of the photovoltaic system at about 14:00 in the afternoon provided for an embodiment of the present invention.

[0037] Figure 4 It is a plan and cross-sectional layout diagram of the photovoltaic cleaning system provided for an embodiment of the present invention.

[0038] Wherein, 1. Shadow generating object; 2. Second slide rail; 3. First slide rail; 4. Cleaning and spraying device; 5. Photovoltaic module; 6. Electrochemical energy storage system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The present invention will be further described below in conjunction with the drawings and embodiments.

[0040] It should be noted that the following detailed descriptions are all exemplary and are intended to provide a further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] In the case of no conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0043] Embodiment 1:

[0044] As Figure 1 , Figure 2 and Figure 3 shown, Embodiment 1 of the present invention provides an annular rotating photovoltaic power generation system for shadow occlusion areas, which is mainly applied to areas with shadow occlusion around line towers, communication base stations, cylindrical / tower-shaped buildings, etc., where it is impossible to arrange a photovoltaic power generation system; when arranging photovoltaic panels in a conventional photovoltaic system, it is usually required that there is no shadow occlusion during the time period from 9:00 to 15:00 to maximize power generation. With the vigorous development of decentralized photovoltaic systems, the sites where photovoltaic power generation systems can be set up are becoming fewer and fewer. This embodiment proposes a rotatable annular photovoltaic power generation system, calculates the shadow occlusion area, avoids the occlusion area when arranging photovoltaic panels, uses a time relay and a light intensity sensor to determine the positions of the occlusion areas at different time periods, and the photovoltaic power generation system rotates with the changes of time and the occlusion areas, so that the area without photovoltaic modules is always located in the shadow occlusion area, thereby avoiding the reduction of power generation caused by shadow occlusion, improving power generation efficiency, and reducing power generation costs.

[0045] Specifically, it includes: an electrically driven carrier chassis arranged around the shadow generating object 1 (such as a line tower, a communication base station, a cylindrical / tower-shaped building) and a first slide rail 3 and a second slide rail 2 arranged around the shadow generating object. Sliding members are provided at both the inner bottom and the outer bottom of the carrier chassis. The sliding member at the inner bottom of the carrier chassis is slidably connected to the first slide rail 3, and the sliding member at the outer bottom of the carrier chassis is slidably connected to the second slide rail 2;

[0046] A photovoltaic module 5 array is provided on the carrier chassis, and the photovoltaic module array is provided with a notch for cooperating with the shadow area. A plurality of photosensitive elements are sequentially arranged at the edge position of the notch of the photovoltaic module 5 array. When the light intensity decrease amount of more than the first preset number of photosensitive elements exceeds the preset value, the carrier chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position again.

[0047] In this embodiment, the photosensitive elements are arranged at equal intervals in sequence at the notch positions of the photovoltaic array. For example, if the notch position is a rectangle, a plurality of photosensitive elements are arranged at equal intervals on three sides of the rectangle. It can be understood that in some other embodiments, the photosensitive elements may not be arranged at equal intervals, as long as they are densely arranged. It can be understood that in some other embodiments, the shape of the notch position may be the same as the shadow shape of the shadow-generating object, which will not be elaborated here.

[0048] In this embodiment, until the shadow area falls back into the notch position again, the following limiting condition is included: the photosensitive intensity of less than the second preset number of photosensitive elements is less than the preset value.

[0049] In this embodiment, the rotation adjustment of the bearing chassis is continuously performed until the number of photosensitive elements with light intensity less than the preset value is the least.

[0050] Optionally, in some other embodiments, each photovoltaic module of the photovoltaic array is connected to a support rod through a rotating mechanism, and the support rod is fixedly connected to the bearing chassis. After the bearing chassis rotates, the photosensitive elements corresponding to each photovoltaic module detect the light intensity, and the photovoltaic module rotates according to the light intensity to achieve the optimal inclination angle.

[0051] In this embodiment, according to the solar angles, the height and width dimensions of the building structure for consecutive days, the average value of the shadow area is calculated, and the notch size is obtained based on the average value of the shadow area.

[0052] In this embodiment, the bearing chassis rotates clockwise or counterclockwise along the first slide rail and the second slide rail. After a plurality of photovoltaic modules are connected in series, they are connected to the inverter system through a slip ring at the center position of the bearing chassis. It can be understood that the slip ring can be arranged on the hollow column on the center side of the bearing chassis, and the hollow column is arranged around the shadow-generating object.

[0053] In this embodiment, the following specific implementation manners are specifically provided:

[0054] (1) To improve the power generation efficiency and optimize the arrangement of photovoltaic modules

[0055] The overall support structure of the photovoltaic system is set as a ring-shaped bearing chassis with the center of the shadow-generating object as the center of the circle. Considering the stability of the photovoltaic support system, the radius of the bearing chassis should not be too large and should be determined according to the area of the shaded area. The photovoltaic modules are installed on the frame of the bearing chassis by using fixed adjustable brackets.

[0056] Generate the volume of an object based on the sunlight angle and shadow at the location, calculate the shape and area of the shadow occlusion area of the shadow-generated object in the horizontal direction of the photovoltaic module. When arranging the photovoltaic modules, leave blank spaces according to the occlusion shape and area to avoid arranging the photovoltaic modules in the blank areas; when arranging the photovoltaic modules, to avoid front-back occlusion and excessive stress on the brackets, the angle of the photovoltaic modules should not be too large, and usually an inclination angle of 8 - 15 degrees is selected.

[0057] (2) Through mechanical rotation, make the blank area of the photovoltaic module always follow the rotation of the occlusion area

[0058] The bearing chassis is provided with an inner ring track (i.e., the first track) and an outer ring track (i.e., the second track). The bottom of the bearing chassis is provided with 8 sets of rolling carts (i.e., driving mechanisms), which are driven as a whole by a power motor to make the bearing chassis rotate smoothly and slowly;

[0059] Light intensity sensors are arranged on the side of the blank area to sense the position change of the occlusion area, and the signal is transmitted to the control system of the power motor to control the motor to drive the bearing chassis to rotate with the position change of the occlusion area;

[0060] The motor control system is provided with a time relay. To save power consumption, the following rotation time is set from 8:00 to 16:00 when the light intensity is relatively high, and it starts to return to the initial position at 17:00 to prepare for the rotation the next day; judge whether the weather is rainy through the light intensity sensor. In rainy weather, the bearing chassis stops rotating.

[0061] (3) Arrange the photovoltaic module brackets at a high position, which can reduce the blank area of the shadow area and is used for the agricultural-photovoltaic complementary project to efficiently utilize the land. The photovoltaic module brackets are arranged at a height position of 2.5m - 3.0m. The shadow occlusion area at this position is smaller than that at ground height, thereby reducing the blank area of the photovoltaic modules and increasing the number of installed panels; crops can also be planted on the ground to facilitate the smooth passage of ground personnel and efficiently utilize the land.

[0062] (4) Four groups of linear spraying systems are fixed at a certain position above the photovoltaic modules, which can regularly spray and clean the photovoltaic modules, and can also use the photovoltaic module surface dirt recognition device to judge whether cleaning is required. The cleaning sewage can be used for irrigating farmland.

[0063] (5) Arrange the power system and energy storage system on the ground. During the day, part of the power generated by the photovoltaic system can provide a charging power source for the energy storage system. The power supply for the rotating motor is taken from the photovoltaic power generation system and the energy storage system. When the photovoltaic system generates electricity during the day, part of the electricity provides power for the rotating motor; in the evening, when the bearing chassis returns to the initial position, the energy storage system provides the power supply; at the same time, the energy storage system, as an auxiliary regulation system for photovoltaic power generation, can flatten the waveform of photovoltaic output, improve the power quality of photovoltaic power generation, and ensure the stable and reliable operation of the power system.

[0064] Embodiment 2:

[0065] Embodiment 2 of the present invention provides a working method for a ring-rotating photovoltaic power generation system in a shadow occlusion area. Using the ring-rotating photovoltaic power generation system in the shadow occlusion area described in Embodiment 1 of the present invention, it includes the following processes:

[0066] Set the initial position of the bearing chassis;

[0067] After reaching the first preset moment, the rotation of the bearing chassis is started;

[0068] Monitor the photosensitive intensity of each photosensitive element in real time. When the photosensitive intensity drop of more than the first preset number of photosensitive elements exceeds the preset value, the bearing chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position;

[0069] After reaching the second preset moment, the bearing chassis returns to the initial position along the original path. Determine whether the weather is rainy or cloudy through the photosensitive element. In rainy or cloudy weather, the bearing chassis stops rotating.

[0070] Specifically, the photovoltaic module array is arranged on a rotatable bearing chassis. The bearing chassis is of a steel structure type, at a height of 2.5 - 3 meters from the ground. The bearing chassis is provided with a circular track, and 8 groups of rolling carts are symmetrically arranged. The carts are driven by special steerable motors. The motors are provided with two power supplies, which are taken from the photovoltaic system power generation and the energy storage system respectively. During the day, the photovoltaic system power generation is preferentially used for power supply. When the output of the photovoltaic system is insufficient, it is automatically switched to the energy storage system for power supply;

[0071] According to the volume of the building blocking the shadow, calculate the shadow occlusion area of the height of the circular structure. In this area, no photovoltaic modules are arranged, which is called the blank area of the photovoltaic modules. Photosensitive sensors are arranged at the edge of the blank area;

[0072] Set the shadow occlusion area at 8:00 in the morning as the initial position of the photovoltaic system. As the position of the sun changes, when the photosensitive sensors at the edge of the blank area are blocked by the shadow and the monitored light intensity drops rapidly, the signal is transmitted to the power control box to control the bearing chassis to rotate clockwise;

[0073] At 16:00 in the evening, the sunlight intensity weakens, and the power generation efficiency of the photovoltaic system decreases. The motor drives the bearing chassis to rotate reversely and returns to the initial set position, waiting to be restarted the next day;

[0074] The photovoltaic module sets a horizontal tilt angle of 8 - 15 degrees according to the latitude where it is located. A fixed adjustable bracket is adopted, and the tilt angle can be adjusted according to the position of the sun in winter and summer. A fixed cleaning spray device is set above the disc, and a rotatable nozzle is used to expand the water spray area. When the dirt recognition device on the surface of the photovoltaic module recognizes that the photovoltaic module needs to be cleaned, the cleaning spray device is started to clean the photovoltaic module.

[0075] Specifically, this embodiment has the following advantages:

[0076] (1) The rotatable circular photovoltaic support structure can change with the change of the sun angle, enabling the photovoltaic module to always avoid the shadow occlusion area and improving the power generation efficiency.

[0077] (2) According to the sun angle, the height and width dimensions of the building structure, the area of the shadow area can be calculated. When laying out the photovoltaic panels, a blank area is left, and this blank area changes with the position of the shadow, improving the power generation efficiency.

[0078] (3) Photosensitive sensors are set at the boundary position of the blank area. When the light intensity decreases rapidly, it is judged that the shadow occlusion area is entered, and the power system is controlled to rotate clockwise to avoid the shadow occlusion, improving the power generation efficiency.

[0079] (4) An electrochemical energy storage system is set. In the evening when the photovoltaic power generation decreases, it provides power for the rotating device to control the prototype photovoltaic structure to return to the starting position and prepare for high-efficiency power generation the next day.

[0080] (5) The height of the module is set to 2.5 - 3 meters, and crops can be planted on the ground. As an agricultural and photovoltaic complementary project, the land is utilized more efficiently.

[0081] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ring-rotating photovoltaic power generation system for shadow occlusion areas, characterized in that: It includes: An electrically driven bearing chassis arranged around the shadow generating object, a first slide rail and a second slide rail arranged around the shadow generating object. Sliding members are provided at both the inner bottom and the outer bottom of the bearing chassis. The sliding member at the inner bottom of the bearing chassis is slidably connected to the first slide rail, and the sliding member at the outer bottom of the bearing chassis is slidably connected to the second slide rail; A photovoltaic module array is provided on the bearing chassis, and the photovoltaic module array is provided with a notch for cooperating with the shadow area. A plurality of photosensitive elements are sequentially arranged at the edge position of the notch of the photovoltaic module array. When the light intensity decrease of more than the first preset number of photosensitive elements exceeds the preset value, the bearing chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position again.

2. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to claim 1, characterized in that: The photosensitive elements are arranged at equal intervals at the notch position of the photovoltaic array.

3. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to claim 1, characterized in that: Until the shadow area falls back into the notch position again, it includes: The light intensity of less than the second preset number of photosensitive elements is less than the preset value.

4. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to claim 3, characterized in that: Continuously perform rotational adjustment of the bearing chassis until the number of photosensitive elements with light intensity less than the preset value is the least.

5. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to claim 1, characterized in that: Each photovoltaic module of the photovoltaic array is connected to a support rod through a rotating mechanism, and the support rod is fixedly connected to the bearing chassis. After the bearing chassis rotates, the photosensitive elements corresponding to each photovoltaic module detect the light intensity, and the photovoltaic modules are rotated according to the light intensity to achieve the optimal inclination angle.

6. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to claim 1, characterized in that: According to the solar angle, the height and width dimensions of the building and structure for consecutive days, calculate the average value of the shadow area, and obtain the notch size according to the average value of the shadow area.

7. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to claim 1, characterized in that: The bearing chassis rotates clockwise or counterclockwise along the first slide rail and the second slide rail.

8. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to any one of claims 1-7, characterized in that: A plurality of photovoltaic modules are connected in series and then connected to an inverter system through a slip ring at the center position of the bearing chassis; or, a spraying device for cleaning the photovoltaic modules is provided above the photovoltaic array.

9. The ring-rotating photovoltaic power generation system for shadow occlusion areas according to any one of claims 1-7, characterized in that: It further includes an electrochemical energy storage system, which provides power for the bearing chassis in the evening when the photovoltaic power generation decreases so that the bearing chassis returns to the starting position.

10. A working method of a ring-rotating photovoltaic power generation system for shadow occlusion areas, characterized in that: The annular rotating photovoltaic power generation system using the shadow shielding area described in any one of claims 1-9 includes the following processes: Set the initial position of the bearing chassis; After reaching the first preset moment, the rotation of the bearing chassis is started; Real-time monitor the photosensitive intensity of each photosensitive element. When the photosensitive intensity decrease of more than the first preset number of photosensitive elements exceeds the preset value, the bearing chassis rotates along the first slide rail and the second slide rail until the shadow area falls back into the notch position again; After reaching the second preset moment, the bearing chassis returns to the initial position along the original path, and the photosensitive element is used to judge whether the weather is rainy. In rainy weather, the bearing chassis stops rotating.

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