CN111219675A

CN111219675A - Novel independent underground space lighting device

Info

Publication number: CN111219675A
Application number: CN201811403086.7A
Authority: CN
Inventors: 刘�东; 刘豪; 袁丹玉
Original assignee: Southwest University of Science and Technology
Current assignee: Southwest University of Science and Technology
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2020-06-02

Abstract

The invention relates to a novel independent underground space lighting device. It is characterized by comprising: the sunlight is focused on the top end of the light guide fiber 4 positioned in the lamp post 5 by the Fresnel lens 1 positioned at the top end of the light collecting cover and the convex lens 6 positioned at the low end in sequence through the solar light collecting cover 12 driven by the sunlight tracking device 2, and the sunlight is guided out from the tail end through the light guide fiber and is transmitted to a room through the reflecting cover 9 and the light diffuser 8 to achieve the purpose of illumination. Solar photovoltaic panels 3 are installed on two sides of the lamppost, and when the sunlight tracking device 2 is supplied with electric energy, redundant electric quantity is stored in the storage battery 10 by solar energy. The stored electric quantity of the accumulator supplies electric energy to the electric lamp 11 through the photosensitive switch 7 by a lead. The invention realizes zero energy consumption to provide illumination for the underground space, and has great significance in reducing the illumination energy consumption of the underground space.

Description

Novel independent underground space lighting device

Technical Field

The invention relates to an underground space lighting device, in particular to a novel independent underground space lighting device combining solar energy and optical fibers.

Background

Along with the steady rise of the overall social economic level, the market resources are increasingly abundant, and the urbanization policy is implemented gradually, so that the living standard of urban residents is continuously improved, and the social advantage resources are mostly concentrated in large cities. Due to the fact that urban population is greatly increased, the traffic pressure of large reserved quantity of private cars is increased, cities are rapidly expanded, urban land is in short supply and the like, various traffic infrastructures and management levels thereof are relatively backward in urban construction in China, and the requirement of rapid social development cannot be met, so that people are forced to continuously explore the future development direction of the cities. In order to reduce the influence of adverse factors such as urban capacity and area and effectively reduce urban diseases under the influence of adverse factors such as road traffic growth, people are actively developing urban underground spaces and realizing comprehensive sustainable development of cities.

Many underground spaces are developed each year, such as underground supermarkets, underground garages, underground highway tunnels, subways, and the like. With the rapid development of underground space, underground lighting is becoming a focus of attention. The traditional mode generally adopts electric energy for illumination directly and completely, and because the underground space has no solar illumination throughout the year, 24-hour uninterrupted power supply has to be selected for ensuring underground illumination, so that not only is a large amount of energy wasted, but also serious safety accidents can be caused by line aging. Therefore, people begin to explore a more novel, energy-saving and safe underground lighting mode. Solar energy, an inexhaustible clean energy, has become the focus of research in underground lighting applications.

At present, the application of solar energy in underground illumination is mainly 3, and one is to directly guide sunlight into a space needing illumination through an optical fiber to achieve the purpose of illumination. For example, publication No. CN107218576A discloses an illumination system incorporating an optical fiber, which is based on the principle that sunlight is concentrated on the optical fiber by a funnel and is guided to other places by the optical fiber; also, for example, the publication No. CN207146267U discloses an indoor light supplement system, which is based on the principle that optical fibers are used to guide sunlight into a room to achieve the purpose of illumination, but the method of directly guiding light through optical fibers alone is greatly affected by weather, and cannot solve the problem of insufficient illumination at night. The second is that the photovoltaic panel is directly utilized to convert solar energy into electric energy, and the electric lamp is driven by electricity to run so as to achieve the purpose of illumination. For example, CN108730890A discloses a device for driving street lamps to illuminate by using solar photovoltaic panel to generate electricity. The mode of directly utilizing solar energy to generate electricity to drive the lamp for illumination is also restricted by severe weather, and particularly in the period of long-time illumination which is not ideal, the storage battery can be empty, so that the solar lamp is suitable for night illumination on the ground but not suitable for ground illumination. The third method is to combine the optical fiber and the solar photovoltaic panel to provide illumination for the ground for a long time. For example, publication No. CN107702043A discloses a method of providing illumination by combining optical fiber with a solar photovoltaic panel, which not only overcomes the disadvantage that illumination cannot be provided at night by only using optical fiber for illumination, but also reduces the load of a storage battery of the photovoltaic panel in the daytime, so that the storage battery can work at night for a long time, thereby achieving the purpose of illumination all day long. However, the device does not realize the tracking of sunlight, reduces the efficiency of guiding light through optical fibers, and in addition, the device generally does not stand out from a power grid, so that the self-sufficiency of energy sources cannot be completely achieved, and the turning-on of an electric lamp does not realize intelligent control and needs personnel to control.

Disclosure of Invention

Aiming at the problems, the invention designs a novel independent underground space lighting device.

The system has the operation thought that: in daytime, the light-collecting cover 12 is driven by the sunlight tracking device 2 to continuously adjust the angle of the light-collecting cover until the straight lines where the center of the Fresnel lens 1, the center of the convex lens 6 and the top end of the light-guiding fiber 4 are positioned are parallel to sunlight, so that the sunlight can be concentrated on the top end of the light-guiding fiber with maximum efficiency, and the sunlight comes out from the tail end and is transmitted into an underground space through the reflecting cover 9 and the light-diffusing sheet 8 to achieve the purpose of illumination; the solar photovoltaic panel 3 converts the collected solar energy into electric energy, most of which is transmitted into the storage battery 10 through a lead for storage, and a small part of which is used for driving the operation of the sunlight tracker in the daytime. When the night comes, the sunlight tracking device stops running, when the photosensitive switch 7 above the ground senses that the intensity of the ground sunlight is lower than a certain value, the built-in switch is closed, so that the storage battery 10 is communicated with the electric lamp 11, the electric lamp is driven to run to achieve the purpose of lighting at night, and therefore the purpose of lighting the underground space 24 hours a day is achieved.

The center of the Fresnel lens, the center of the convex lens and the top end of the optical fiber are always in a straight line, and the optical fiber penetrates through the lamp post and is guided to the ground from the ground.

The sunlight tracking device fixes the bottom end of the light collecting cover and the top end of the light guide fiber, penetrates through the lamp post through a wire to be directly connected with the solar photovoltaic panel and is provided with electric energy by the lamp post.

The solar photovoltaic panels are respectively fixed on the cross frames at two sides of the lamp post and keep a certain inclination with the horizontal plane.

The storage battery is connected with the two solar photovoltaic panels through wires respectively, the storage battery is located below the ground, and the wires penetrate through the ground from the inside of the lamppost.

The lamps are connected with the photosensitive switches, the photosensitive switches are connected with the storage battery, and the photosensitive switches are located above the ground.

Wherein, the inner wall of the reflecting cover is pasted with an aluminum foil reflecting layer, and the bottom end of the opening of the reflecting cover is provided with a light-diffusing piece.

The invention has the advantages that:

1. the double lenses are adopted for light condensation, so that the conduction strength of the light guide fiber is improved; 2. the solar photovoltaic panel is complementary with the light guide fiber, so that the defect that the light guide fiber cannot work at night is overcome, the whole day load of the storage battery is avoided, the service life of the storage battery is prolonged, and the later maintenance cost is reduced; 3. adopt photosensitive switch to come the operation of intelligent control electric light, need not artificially to control, save the human cost: 4. the device has strong independence, does not need to consume the electric quantity in the power grid, and can adapt to any environment with sunlight; 5. simple structure, low in cost, the practicality is strong, can use widely on a large scale.

Drawings

FIG. 1 is a schematic view of an underground lighting installation of an embodiment of the present invention.

In the figure: 1. a Fresnel lens; 2. a sunlight tracking device; 3. a solar photovoltaic panel; 4. a light guide fiber; 5. a lamp post; 6. a convex lens; 7. photosensitive switching on; 8 a light diffuser; 9. a reflector; 10. a storage battery; 11. and (4) an electric lamp.

Fig. 2 is a diversity fresnel lens.

12. A diversity Fresnel lens; 13. a Fresnel lens unit.

Fig. 3 is an optical splitter.

2. A sunlight tracking device; 4. a light guide fiber; 12. a diversity Fresnel lens; 14. an orifice plate;

Detailed Description

The invention is further illustrated, without limitation, in connection with figures 1, 2, 3 and the examples.

In daytime, the light-collecting cover 12 is driven by the sunlight tracking device 2 to continuously adjust the angle of the light-collecting cover until the straight lines where the center of the Fresnel lens 1, the center of the convex lens 6 and the top end of the light-guiding fiber 4 are positioned are parallel to sunlight, so that the sunlight can be concentrated on the top end of the light-guiding fiber with maximum efficiency, and the sunlight comes out from the tail end and is transmitted into an underground space through the reflecting cover 9 and the light-diffusing sheet 8 to achieve the purpose of illumination; the solar photovoltaic panel 3 converts the collected solar energy into electric energy, most of which is transmitted into the storage battery 10 through a lead for storage, and a small part of which is used for driving the operation of the sunlight tracker in the daytime. When the night comes, the sunlight tracking device stops running, when the photosensitive switch 7 above the ground senses that the intensity of the ground sunlight is lower than a certain value, the built-in switch is closed, so that the storage battery 10 is communicated with the electric lamp 11, the electric lamp is driven to run to achieve the purpose of lighting at night, and therefore the purpose of lighting the underground space 24 hours a day is achieved.

Furthermore, the power supply of the sunlight tracking device is only from one of the solar photovoltaic panels, so that the storage battery can store sufficient electric energy.

Further, the lens with the larger diameter uses a Fresnel lens, and the lens with the smaller diameter uses a convex lens, so that the manufacturing cost of the device is reduced.

Furthermore, the diameter and number of the optical fibers are determined according to the illumination requirements of the environment and the underground space.

Furthermore, the center of the Fresnel lens, the center of the convex lens and the top end of the optical fiber are always in a straight line, and the optical fiber penetrates through the lamp post and is guided to the ground from the ground just for enhancing the light collecting efficiency of the optical fiber and protecting the optical fiber from the influence of the surrounding environment.

Further, all wires need to pass through the ground through the inside of the lamp post, so that the safety of the cable is guaranteed.

Furthermore, the solar photovoltaic panel is respectively fixed on the crossbearers at two sides of the lamp post and keeps a certain inclination with the horizontal plane, and the inclination degree and the inclination direction are determined according to the geographical position of the device, so that the light collecting efficiency of the solar photovoltaic panel is enhanced.

Furthermore, the storage battery is connected with the two solar photovoltaic panels through leads respectively, and the storage battery is located below the ground, so that the storage battery is protected while the storage capacity of the storage battery is ensured.

Furthermore, the lamps are all connected with a photosensitive switch, the photosensitive switch is connected with a storage battery, and the photosensitive switch is positioned above the ground.

Further, photosensitive light can be opened and light can be set up with the lamp pole on, also can establish the carrier in addition and be used for installing photosensitive light of opening to photosensitive switch can accurately sense the change of ground sunshine intensity.

Furthermore, an aluminum foil reflecting layer is attached to the inner wall surface of the reflecting cover, so that the end loss of the light guide fiber is reduced.

Furthermore, the bottom end of the opening of the reflecting cover is provided with a light-diffusing sheet so as to scatter light and reduce the vertigo value of the lighting space.

The device has wide application range, can be used for underground spaces such as underground parking lots, subway stations, underground highways, highway tunnels and the like, particularly underground highways of urban central roadways or remote underground tunnels and the like, and can well meet the illumination requirements of the places.

For example, if the device is used for lighting of underground highways, the device can be installed on both sides of the road or in the central greenbelt like a general street lamp. During the daytime, the light guide fiber can conduct the collected sunlight to the underground, can be used as an indicator light or a road side light of a road, and can be powered by the storage battery for illumination at night. Because underground road often extends very long, lighting device is not concentrated, if adopt centralized control monitoring system to monitor the running condition of street lamp can increase initial investment, and later maintenance cost is high. The device is a novel lighting device which is completely independent from a power grid, can be combined with a low-price Lara radio monitoring system to monitor the electric quantity of the storage battery, and does not need personnel to control the storage battery and supply power to the storage battery. Furthermore, if the device is used in an area with insufficient solar energy resources, an a-si solar panel can be adopted and provided with a standby storage battery, and the solar panel stores electric energy in the two storage batteries and can well respond to the time period with weak illumination.

In another example, the device can also be applied to a subway station, and because the subway has large pedestrian flow and has higher requirements on illumination, the requirements on light collection and light conduction efficiency of the light guide fiber are higher. At this moment, the diversity type Fresnel lens 12 can be adopted to replace the original Fresnel lens 1, the convex lens 6 is removed, the pore plate 14 is additionally arranged, the optical fiber 4 can be divided into a plurality of strands to be respectively fixed on the pore plate 14, one Fresnel lens unit 13 only serves one strand of optical fiber, the light guide effect can be obviously enhanced, the illumination requirement of the subway station can be met in most of time, and the illumination power consumption of the subway station is reduced.

The foregoing is merely exemplary of the preferred embodiments of the present invention, and details which have not been set forth are within the ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation, such as the change of the positions of the storage battery and the photosensitive switch, the change of the power of the solar photovoltaic panel, etc., based on the technical teaching of the present invention also falls within the protection scope of the present invention.

Claims

1. The invention relates to a novel independent underground space lighting device, which is characterized by comprising: the movement of the solar energy collecting shade 12 driven by the sunlight tracking device 2, the sunlight sequentially passes through the Fresnel lens 1 positioned at the top end of the light collecting shade and the convex lens 6 positioned at the low end to be focused at the top end of the light guide fiber 4 positioned in the lamp post 5, the sunlight is guided out from the tail end through the light guide fiber and is transmitted to a room through the reflecting shade 9 and the light diffuser 8 to achieve the purpose of illumination; the solar photovoltaic panels 3 are arranged on two sides of the lamppost and are connected with the sunlight tracking device 2 through leads to provide electric energy for the lamppost, and meanwhile, redundant electric quantity is stored in the storage battery 10 through leads; the stored electric quantity of the accumulator supplies electric energy to the electric lamp 11 through the photosensitive switch 7 by a lead.

2. A novel self-contained underground space lighting device as claimed in claim 1, wherein said fresnel lens center, convex lens center and optical fiber top are always in a straight line, and the optical fiber is led to underground from ground through the lamp post.

3. A novel self-contained underground space lighting fixture as claimed in claim 1, wherein said sunlight tracking means is mounted to the bottom end of the light-collecting cover and the top end of the light-conducting fiber, and is connected directly to the solar photovoltaic panel by wires passing through the lamp post and being powered by the solar photovoltaic panel.

4. A novel self-contained underground space lighting device as claimed in claim 1, wherein said solar photovoltaic panels are fixed to the horizontal frame on both sides of the lamp post, respectively, and maintain a certain inclination with respect to the horizontal plane.

5. A novel self-contained underground space lighting device as claimed in claim 1, wherein said battery is connected to two solar photovoltaic panels by wires passing through the ground from the inside of the lamppost.

6. A novel self-contained underground space lighting fixture as claimed in claim 1, wherein said lamps are all connected to light sensitive switches, which are connected to batteries, and said light sensitive switches are located above ground.

7. A novel self-contained underground space lighting fixture as claimed in claim 1, wherein said batteries provide power to only two lamps.

8. A novel independent underground space lighting device as claimed in claim 1, wherein said reflector has an aluminum foil reflector attached to its inner wall and a light diffuser at the bottom of its opening.