Photovoltaic traffic indicating device

Abstract

The utility model discloses a photovoltaic traffic indicating device which comprises a fixing frame and an indicating assembly, the indicating assembly comprises an indicating board, and LED lamp beads are arranged on the front face of the indicating board; the photovoltaic mechanism comprises a photovoltaic frame, a photovoltaic assembly and a driving assembly, the photovoltaic assembly comprises two photovoltaic units which are rotationally connected, the driving assembly drives the photovoltaic assembly to move between an unfolding station and a folding station, under the unfolding station, light receiving surfaces of the two photovoltaic units face upwards and are located on the same plane, under the folding station, light receiving surfaces of the two photovoltaic units face upwards and are located on the same plane, and under the folding station, light receiving surfaces of the two photovoltaic units face upwards and are located on the same plane. The two photovoltaic units are attached in a sealing manner, and light receiving surfaces are arranged oppositely; and a controller and a storage battery. According to the photovoltaic traffic indicating device, the two photovoltaic units of the photovoltaic assembly are controlled to be flexibly switched between the folding station and the unfolding station through the driving assembly, so that the photovoltaic units are adjusted to the folding station when light is weak and is not enough for photovoltaic conversion of the photovoltaic units, exposure of a light receiving surface is avoided, the dust accumulation amount is reduced, and the service life of the photovoltaic traffic indicating device is prolonged. And the cleaning period and the use time of the photovoltaic unit are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic traffic, in particular to a photovoltaic traffic indication device. Background Art

[0002] Road traffic signs are devices used to manage traffic by conveying information to road users through colors, shapes, characters, graphics, etc. They can express traffic regulations in a vivid, specific and concise manner, provide accurate and timely information and guidance, enable road users to reach their destinations smoothly, and promote smooth traffic and driving safety.

[0003] In the prior art, Chinese utility model patents such as those with publication numbers CN215895903U, CN221029720U, and CN214695276U disclose a variety of different traffic signs. Each of these signs is equipped with a battery, a solar photovoltaic panel, and a light strip. During the day, the solar photovoltaic panel generates photovoltaic power, which is stored in the battery. At night, the battery powers the light strip, making it easier for pedestrians and vehicle drivers to see the traffic signs and avoiding traffic accidents.

[0004] Although the above-mentioned device can achieve energy conservation and reduce the need for city power supply, the light-receiving surface of the photovoltaic panel is exposed to the outside for a long time, and dust easily accumulates on the surface. After long-term use, the power generation efficiency is affected, and the power generation is reduced, resulting in a decrease in the battery reserve power, which shortens the service life of the sign. Moreover, in weather with strong sunlight, it is difficult for pedestrians and drivers to see the content on the traffic sign clearly. Specifically, when the sun is at the back of the sign, pedestrians and drivers are facing the sunlight when observing the traffic sign, which is prone to dazzle. When the sun is at the front of the sign, too much light shines on the sign, causing the sign to be too bright, which is also not conducive to seeing the content on the sign clearly.

[0005] Therefore, it is necessary to improve the photovoltaic traffic signs in the prior art. Utility Model Content

[0006] The purpose of the utility model is to overcome the defects in the prior art and provide a photovoltaic traffic indication device which reduces dust accumulation to extend service life and facilitates clear observation.

[0007] To achieve the above technical effects, the technical solution of the present invention is: a photovoltaic traffic indication device, comprising:

[0008] A fixing frame and an indicator assembly, wherein the indicator assembly is fixedly arranged directly above the road surface by the fixing frame, and the indicator assembly includes a vertically arranged indicator board, and an LED lamp is arranged on the front of the indicator board;

[0009] A photovoltaic mechanism, the photovoltaic mechanism comprising a photovoltaic rack fixed above the sign, a photovoltaic assembly movable on the photovoltaic rack, and a drive assembly driving the movement of the photovoltaic assembly, the photovoltaic assembly comprising two photovoltaic units rotatably connected with their rotational axes extending in the horizontal direction, the drive assembly driving the photovoltaic assembly to move between an unfolded position and a folded position, wherein in the unfolded position, the light-receiving surfaces of the two photovoltaic units are both facing upward and located in the same plane, and in the folded position, the two photovoltaic units are sealed and fitted together with their light-receiving surfaces facing each other;

[0010] The controller and the battery, the driving component, the battery and the LED lamp beads are all electrically connected to the controller, and the photovoltaic unit is electrically connected to the battery.

[0011] Preferably, in order to increase the photovoltaic power generation at the unfolded position and improve the shading effect, and to avoid dust on the light-receiving area of the photovoltaic unit at the folded position, the two photovoltaic units of the photovoltaic assembly are both horizontally arranged at the unfolded position, and the two photovoltaic units of the photovoltaic assembly are both vertically arranged at the folded position.

[0012] Preferably, in order to facilitate the flexible switching of the photovoltaic assembly between the unfolding position and the folding position, the photovoltaic frame includes a horizontally arranged slide rail perpendicular to the relative rotation axis of the two photovoltaic units, and the two photovoltaic units are respectively connected to two connecting parts. The driving assembly is used to adjust the distance between the two connecting parts to drive the photovoltaic assembly to move between the unfolding position and the folding position.

[0013] Preferably, in order to facilitate the position change of the photovoltaic unit, the two connecting parts both include connecting rods, and the axis lines both extend in a horizontal direction perpendicular to the slide rail. Among the two connecting rods, one rotates around its own axis line on the slide rail, and the other rolls on the slide rail, and the rolling direction is parallel to the extension direction of the slide rail.

[0014] Preferably, in order to drive the photovoltaic assembly to move between the folding station and the unfolding station, the driving assembly includes a telescopic unit and a transmission rod, the telescopic unit is arranged on the signboard, and the output end of the telescopic unit is connected to the connecting rod rolling on the slide rail through the transmission rod.

[0015] Preferably, in order to reduce energy consumption when driving the photovoltaic assembly, the axis lines of the two connecting rods pass through the center of gravity of the two photovoltaic units respectively or are closely adjacent to the center of gravity of the two photovoltaic units respectively.

[0016] Preferably, in order to ensure the balance and stability of the overall structure of the device, two photovoltaic components are arranged in the horizontal direction and are distributed in a mirror-symmetrical manner. The mirror-symmetrical planes of the two photovoltaic components extend in the vertical direction and are located between the front and back sides of the indicator component.

[0017] Preferably, in order to facilitate road traffic indication on both sides of the device, two signboards are provided and arranged back to back, and the indication assembly also includes a light shield, which is a downward U-shape, and the two signboards are fixed in the light shield.

[0018] Preferably, in order to protect the controller and the battery, the light shield, the fixing frame and the two signboards are enclosed to form an isolation cavity, and the controller and the battery are both arranged in the isolation cavity.

[0019] Preferably, in order to facilitate the detection of light intensity, when the sunlight is weak or there is no sunlight and the photovoltaic unit cannot generate photovoltaic power, the photovoltaic component is adjusted to the folded position, and when the sunlight reaches a certain intensity to meet the requirements of the photovoltaic unit's photoelectric conversion, the photovoltaic component is adjusted to the unfolded position. A light sensor is also fixed above the light shield, and the light sensor is electrically connected to the controller.

[0020] In summary, compared with the existing technology, the photovoltaic traffic sign device of the present invention controls the two photovoltaic units of the photovoltaic assembly to flexibly switch between the folding position and the unfolding position through the driving component, so that when the light is weak and insufficient to cause the photovoltaic unit to perform photoelectric conversion, the photovoltaic unit is adjusted to the folding position to avoid exposure of the light-receiving surface, reduce dust accumulation, and extend the cleaning cycle and use time of the photovoltaic unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 yes Figure 1 Front view of

[0023] Figure 3 This is a schematic structural diagram of another usage state of the utility model;

[0024] Figure 4 yes Figure 3 Front view of

[0025] Figure 5 yes Figure 4 Explosion diagram of

[0026] Figure 6 It is a schematic diagram of the connection structure between the slide rail and the photovoltaic module;

[0027] Figure 7 yes Figure 6 Explosion diagram of

[0028] Figure 8 yes Figure 7 A magnified view of part A;

[0029] In the figure: 1. Fixed frame; 11. Base; 12. Post; 13. Horizontal plate; 14. Reinforced diagonal rod; 2. Indicator assembly; 21. Indicator board; 22. LED lamp beads; 23. Light shield; 3. Photovoltaic rack; 31. Slide rail; 311. Strip hole; 312. Round hole; 32. Support frame; 4. Photovoltaic assembly; 41. Photovoltaic unit; 411. Pin; 42. Connector; 43. Roller; 44. Connecting rod; 5. Drive assembly; 51. Telescopic unit; 52. Transmission rod; 6. Controller; 7. Battery; 8. Light sensor. DETAILED DESCRIPTION

[0030] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0031] like Figures 1-8 As shown, the photovoltaic traffic indication device of the present utility model includes:

[0032] The fixing frame 1 and the indicating assembly 2 are fixedly arranged directly above the road surface by the fixing frame 1. The indicating assembly 2 includes a vertically arranged indicating sign 21. The front of the indicating sign 21 is provided with an LED lamp bead 22.

[0033] The photovoltaic mechanism includes a photovoltaic rack 3 fixed above the sign 21, a photovoltaic assembly 4 movable on the photovoltaic rack 3, and a driving assembly 5 that drives the photovoltaic assembly 4. The photovoltaic assembly 4 includes two photovoltaic units 41 that are rotatably connected and whose rotation axis extends in the horizontal direction. The driving assembly 5 drives the photovoltaic assembly 4 to move between the deployment position and the folding position. In the deployment position, the light-receiving surfaces of the two photovoltaic units 41 are both facing upward and located in the same plane. In the folding position, the two photovoltaic units 41 are sealed and attached, and the light-receiving surfaces are arranged facing each other.

[0034] The controller 6 and the battery 7 , the driving assembly 5 , the battery 7 and the LED lamp beads 22 are all electrically connected to the controller 6 , and the photovoltaic unit 41 is electrically connected to the battery 7 .

[0035] Specifically, in the present invention, the fixing frame 1 includes a horizontal base 11, which is fixed to the ground on one side of the road. A column 12 extending in a vertical direction is fixed above the base 11, and a horizontal plate 13 extending in a horizontal direction and having a length direction consistent with the width of the road is fixed to the top of the column 12. A reinforcing diagonal rod 14 is also fixedly connected between the column 12 and the horizontal plate 13 to ensure the structural strength of the fixing frame 1; the signboard 21 is arranged vertically, with its width direction being the vertical direction and its length direction being consistent with the length direction of the horizontal plate 13. LED lamp beads 22 are arranged on the inner side of the edge of the signboard 21.

[0036] On sunny days, the sunlight is strong enough to provide the photovoltaic unit 41 with photoelectric conversion. At this time, the driving component 5 controls the photovoltaic component 4 to adjust and maintain it in the deployment position. Figure 1 and Figure 2 As shown, in the unfolded position, the light-receiving surfaces of the two photovoltaic units 41 of the photovoltaic assembly 4 are located in the same plane and are arranged upward, and the photovoltaic units 41 can receive sunlight for photoelectric conversion and store electrical energy using the battery 7; at night, on rainy days or when the sunlight is too weak to provide the photovoltaic units 41 with photoelectric conversion, the driving assembly 5 controls the photovoltaic assembly 4 to adjust and maintain it in the folded position, as shown in FIG. Figure 3 and Figure 4 As shown, in the folded position, the two photovoltaic units 41 are sealed and fitted together, and their light-receiving surfaces are facing each other. This prevents the light-receiving surfaces of the two photovoltaic units 41 from being exposed, thereby significantly reducing the accumulation of dust on the photovoltaic units 41 in this situation, thereby extending the cleaning cycle of the photovoltaic units 41, extending their service life, and ensuring the photoelectric conversion efficiency of the photovoltaic units 41, so that the battery 7 can store more electrical energy. At night, the battery 7 can power the LED lamp beads 22, so that the surface of the sign 21 is illuminated, making it easier for passers-by and drivers to clearly observe the content on the sign 21, which is beneficial to the management of road traffic. Compared with other electrical lighting facilities, the LED lamp beads 22 that illuminate the sign 21 have lower energy consumption. While saving electricity, it can ensure that the battery 7 has enough electricity to supply the LED lamp beads 22 for lighting.

[0037] A further improvement is that in the extended position, the two photovoltaic units 41 of the photovoltaic assembly 4 are both arranged horizontally, and in the folded position, the two photovoltaic units 41 of the photovoltaic assembly 4 are both arranged vertically. With this structure, in the extended position, the light-receiving surfaces of the photovoltaic units 41 are horizontal, facilitating the reception of sunlight for photovoltaic power generation. In the folded position, the photovoltaic units 41 are arranged vertically, which facilitates the fall of dust particles from the surface of the photovoltaic units 41, reducing the amount of dust accumulated on the light-receiving surfaces.

[0038] A further improvement is that two photovoltaic components 4 are provided in the horizontal direction and are distributed in a mirror-symmetrical manner, and the mirror-symmetrical planes of the two photovoltaic components 4 extend in the vertical direction and are located between the front and back surfaces of the indicator component 2 .

[0039] After adopting the above improvements, on the one hand, the number of photovoltaic modules 4 is increased, so that the photovoltaic power generation is increased, which is beneficial for the battery 7 to store sufficient electrical energy; on the other hand, the device structure is made more balanced and stable; in addition, when the photovoltaic modules 4 move to the deployment position, the two photovoltaic modules 4 are respectively located above the front and above the rear sides of the indicator module 2, which can block the sunlight shining on the front and back of the indicator module 2, avoiding the external sunlight being too strong, making it difficult for passers-by and drivers to see the content on the sign 21.

[0040] A further improvement is that two signboards 21 are provided and arranged back to back, and the indicator assembly 2 also includes a light shield 23, which is a downward U-shaped light shield, and the two signboards 21 are fixed inside the light shield 23. After adopting the above improvement, the indicator assembly 2 has two signboards 21 arranged back to back, which is convenient for providing road traffic instructions to pedestrians and drivers on both sides. The light shield 23 can block some of the sunlight that shines on the signboard 21, ensuring that the content of the signboard 21 is clearly visible, and can also focus the illumination range of the LED lamp beads 22 on the inner side of the light shield 23, making the content on the signboard 21 easier to see at night.

[0041] A further improvement is that the light shield 23, the fixing frame 1 and the two signboards 21 enclose an isolation chamber, and the controller 6 and the battery 7 are both arranged in the isolation chamber. Specifically, the light shield 23 is an inverted U-shape, the inner wall of the light shield 23 is fixedly connected to the top wall and two side walls of the signboard 21, and the bottom wall of the signboard 21 is fixedly connected to the cross plate 13, so that the light shield 23, the fixing frame 1 and the two signboards 21 enclose an isolation chamber, and the controller 6 and battery 7 inside are protected by the sealed isolation chamber.

[0042] A further improvement is that the photovoltaic rack 3 includes a slide rail 31 horizontally arranged along a direction perpendicular to the relative rotation axis of the two photovoltaic units 41. The two photovoltaic units 41 are respectively connected to two connecting parts 42. The driving component 5 is used to adjust the distance between the two connecting parts 42 to drive the photovoltaic component 4 to move between the unfolding position and the folding position.

[0043] Specifically, the photovoltaic frame 3 also includes a support frame 32, the bottom end of the support frame 32 is fixed above the light shield 23, and the top of the support frame 32 is fixed with two slide rails 31 distributed side by side along the length direction of the sign 21 and extending in the horizontal direction. The two slide rails 31 are arranged on both sides of the photovoltaic component 4, and both sides of the photovoltaic unit 41 are fixedly connected with connecting parts 42, and the connecting parts 42 correspond one-to-one to the slide rails 31.

[0044] In addition, a pin 411 is provided at the end of the side wall of the photovoltaic unit 41. The pins 411 of the two photovoltaic units 41 are hingedly connected by a connecting rod 44, so that the two photovoltaic units 41 are connected in relative rotation through the structure formed by the connecting rod 44 and the pin 411. The distance between the connecting members 42 corresponding to the two photovoltaic units 41 of the photovoltaic assembly 4 is controlled by the drive assembly 5 to achieve relative rotation of the two photovoltaic units 41, and the movable position of the photovoltaic assembly 4 is adjusted to switch the photovoltaic assembly 4 between the folded position and the unfolded position.

[0045] A further improvement is that both connecting parts 42 include connecting rods, and their axis lines extend in a horizontal direction perpendicular to the slide rail 31. Among the two connecting rods, one rotates around its own axis line on the slide rail 31, and the other rolls on the slide rail 31, and the rolling direction is parallel to the extension direction of the slide rail 31.

[0046] Specifically, a circular hole 312 and a strip hole 311 are provided at both ends of the slide rail 31. The length direction of the two strip holes 311 is consistent with the length direction of the slide rail 31, and the two strip holes 311 are located between the two circular holes 312. The inner diameter of the circular hole 312, the width of the strip hole 311 and the outer diameter of the connecting rod are consistent. The two connecting rods are respectively passed through the inner side of the circular hole 312 and the inner side of the strip hole 311. In addition, a roller 43 is sealed on the outside of the connecting rod passed through the inner side of the strip hole 311, and the roller 43 rolls on the inner side of the slide rail 31.

[0047] After adopting the above structure, the circular hole 312 and the connecting rod passing through the inner side of the circular hole 312 enable the photovoltaic unit 41 corresponding to the connecting rod to rotate around the axis of the circular hole 312, and in the other photovoltaic unit 41, the driving component 5 acts on its corresponding connecting rod, that is, the connecting rod passing through the strip hole 311, so that the connecting rod rolls inside the strip hole 311, thereby facilitating the rotation of the photovoltaic unit 41. In this way, when the driving component 5 is in action, it can drive the two photovoltaic units 41 to move.

[0048] A further improvement is that the drive assembly 5 includes a telescopic unit 51 and a transmission rod 52 , the telescopic unit 51 is arranged on the sign 21 , and the output end of the telescopic unit 51 is connected to a connecting rod rolling on the slide rail 31 through the transmission rod 52 .

[0049] Specifically, there are two drive components 5, which are located on both sides of the light shield 23 and correspond one-to-one to the two slide rails 31. The telescopic unit 51 is an electric push rod, whose shell extends in the vertical direction and is fixed on the outer wall of the light shield 23. The telescopic rod is hinged to the connecting rods passing through the inner side of the strip hole 311 in the two photovoltaic components 4 through two transmission rods 52.

[0050] After adopting the above structure, an electric push rod is used to control the upward and downward movement of the telescopic rod, pulling the transmission rod 52, and the transmission rod 52 acts on the connecting rod passing through the inner side of the strip hole 311, driving one of the photovoltaic units 41 to move, and then driving the other photovoltaic unit 41 to move through the pin shaft 411 and the connecting rod 44, so that the photovoltaic assembly 4 can move between the folding position and the unfolding position.

[0051] A further improvement is that the axis lines of the two connecting rods pass through the centers of gravity of the two photovoltaic cells 41 or are closely adjacent to the centers of gravity of the two photovoltaic cells 41. Specifically, the axis lines of the two connecting rods pass through the centers of gravity of the two photovoltaic cells 41. With this structure, when the drive assembly 5 controls the movement of the photovoltaic assembly 4, the center height position of the photovoltaic cell 41 remains unchanged, which helps reduce the energy consumption required to drive the photovoltaic assembly 4, thereby saving energy.

[0052] A further improvement is that a light sensor 8 is fixed above the light shield 23, and the light sensor 8 is electrically connected to the controller 6. In order to prevent the light sensor 8 from being blocked, the light sensor 8 is fixed on one of the slide rails 31. The light sensor 8 is used to conveniently detect the external light intensity to determine whether the light intensity is sufficient for the photovoltaic unit 41 to use for photovoltaic power generation. When the light irradiation intensity reaches a preset value, the drive component 5 controls the photovoltaic component 4 to move to the unfolded position and maintain this position, and uses the two photovoltaic units 41 with the light-receiving surfaces facing upward to perform photovoltaic power generation and store electrical energy. When the light irradiation intensity is lower than the preset value, the drive component 5 controls the photovoltaic component 4 to move to the folded position and maintain this position, so that the two photovoltaic units 41 are sealed and fitted together while the light-receiving surfaces are facing each other, thereby avoiding long-term dust accumulation on the light-receiving surface. In this way, the amount of dust accumulation on the light-receiving surface is reduced to ensure that the photovoltaic unit 41 has sufficient photoelectric conversion efficiency, ensure the reserve power of the battery 7, and extend the cleaning cycle of the photovoltaic unit 41 and the service life of the device.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A photovoltaic traffic indication device, characterized in that: include: A fixing frame (1) and an indicator assembly (2), wherein the indicator assembly (2) is fixedly arranged directly above a road surface via the fixing frame (1), and the indicator assembly (2) comprises a vertically arranged indicator board (21), wherein an LED lamp bead (22) is arranged on the front of the indicator board (21); A photovoltaic mechanism, the photovoltaic mechanism comprising a photovoltaic frame (3) fixed above the signboard (21), a photovoltaic assembly (4) movable on the photovoltaic frame (3), and a driving assembly (5) for driving the photovoltaic assembly (4) to move, the photovoltaic assembly (4) comprising two photovoltaic units (41) rotatably connected with each other and with rotational axis extending in a horizontal direction, the driving assembly (5) driving the photovoltaic assembly (4) to move between an unfolding position and a folding position, in the unfolding position, the light-receiving surfaces of the two photovoltaic units (41) are both facing upward and located in the same plane, and in the folding position, the two photovoltaic units (41) are sealed and attached and the light-receiving surfaces are arranged facing each other; A controller (6) and a battery (7), the driving component (5), the battery (7) and the LED lamp bead (22) are all electrically connected to the controller (6), and the photovoltaic unit (41) is electrically connected to the battery (7).

2. The photovoltaic traffic indication device according to claim 1, characterized in that: In the unfolded position, the two photovoltaic units (41) of the photovoltaic assembly (4) are both arranged horizontally, and in the folded position, the two photovoltaic units (41) of the photovoltaic assembly (4) are both arranged vertically.

3. The photovoltaic traffic indication device according to claim 2, characterized in that: The photovoltaic rack (3) includes a slide rail (31) arranged horizontally along a direction perpendicular to the relative rotation axis of the two photovoltaic units (41), the two photovoltaic units (41) are respectively connected to two connecting members (42), and the driving component (5) is used to adjust the distance between the two connecting members (42) to drive the photovoltaic component (4) to move between the unfolding position and the folding position.

4. The photovoltaic traffic indication device according to claim 3, characterized in that: The two connecting members (42) both include connecting rods, the axis lines of which extend in a horizontal direction perpendicular to the slide rail (31). One of the two connecting rods rotates on the slide rail (31) around its own axis line, and the other rolls on the slide rail (31), and the rolling direction is parallel to the extension direction of the slide rail (31).

5. The photovoltaic traffic indication device according to claim 4, characterized in that: The driving assembly (5) comprises a telescopic unit (51) and a transmission rod (52); the telescopic unit (51) is arranged on the sign (21); and an output end of the telescopic unit (51) is connected to a connecting rod rolling on the slide rail (31) via the transmission rod (52).

6. The photovoltaic traffic indication device according to claim 4, characterized in that: The axis lines of the two connecting rods respectively pass through the centers of gravity of the two photovoltaic units (41) or are respectively adjacent to the centers of gravity of the two photovoltaic units (41).

7. The photovoltaic traffic indication device according to claim 1, characterized in that: Two photovoltaic components (4) are provided in a horizontal direction and are distributed in a mirror-symmetrical manner. The mirror-symmetrical surfaces of the two photovoltaic components (4) extend in a vertical direction and are located between the front and back surfaces of the indicating component (2).

8. The photovoltaic traffic indication device according to claim 1, characterized in that: Two indicator signs (21) are provided and are arranged back to back. The indicator assembly (2) further comprises a light shield (23). The light shield (23) is in a downward U-shape. The two indicator signs (21) are fixed in the light shield (23).

9. The photovoltaic traffic indication device according to claim 8, characterized in that: The light shield (23), the fixing frame (1) and the two indicator signs (21) enclose an isolation cavity, and the controller (6) and the battery (7) are both arranged in the isolation cavity.

10. The photovoltaic traffic indication device according to claim 8, characterized in that: A light sensor (8) is also fixed above the light shield (23), and the light sensor (8) is electrically connected to the controller (6).

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