CN109027798B

CN109027798B - Artificial skylight system

Info

Publication number: CN109027798B
Application number: CN201810751629.8A
Authority: CN
Inventors: 金尚忠; 侯彬; 金怀洲; 王赟; 陈亮; 石岩
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2018-07-10
Filing date: 2018-07-10
Publication date: 2020-10-09
Anticipated expiration: 2038-07-10
Also published as: CN109027798A

Abstract

The invention discloses an artificial skylight system, and relates to the technical field of photoelectricity. The system mainly comprises two parts: artificial light source simulating sunlight and Rayleigh scattering structure reproducing skylight. The invention firstly uses devices such as a light source, a collimator, a spectroscope, a light-transmitting lampshade and the like to simulate the sunlight, and automatically simulates the color temperature, the illumination and the irradiation direction of the sunlight according to the weather and the time of the day; automatically switching the brightness when the corresponding person has a rest or works; simulating the warmth sensation a person would have when the sun is shining on. The Rayleigh scattering process of sunlight passing through the atmosphere is reproduced through the nanometer diffuse scattering plate, the color filter and the light-transmitting lampshade, so that the effect of a real skylight is simulated.

Description

Artificial skylight system

Technical Field

The invention relates to the technical field of photoelectricity, in particular to an artificial skylight system.

Background

Recent studies have clearly shown that people perform better and feel more comfortable in indoor environments with sunlight. Convincing evidence suggests that solar radiation reduces the work pressure and negative impact of people, enhances mood and work efficiency, and improves the physical and mental health of people living indoors in the long term.

However, some rooms are not able to receive sunlight due to various factors, and the artificial skylight plays an important role. Artificial skylights, which can create a virtual sun and diffuse blue sky, can be installed in offices or other rooms without natural ambient light, provide architects and lighting engineers with the option of creating new and otherwise unavailable lighting effects. Furthermore, many offices and rooms may appear claustrophobic when the outside world has no obvious view, but the use of artificial skylights can help alleviate this problem.

In addition, the artificial skylight does not emit infrared radiation, which reduces the burning sensation to the skin of people, and emits negligible ultraviolet dose compared with natural sunlight.

Disclosure of Invention

The technical problem to be solved by the invention is how to provide an artificial skylight system which can effectively provide artificial sunlight and diffused blue-light for a room lacking natural light.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an artificial skylight system, characterized by: including the artificial light source part of simulation sunlight and the rayleigh scattering part of reappearing the skylight, artificial light source part includes light source, collimater, spectroscope and printing opacity lamp shade, rayleigh scattering part includes speculum, nanometer diffuse scattering board and color filter, the collimater is located the downside of light source, the spectroscope is located the downside of collimater, the speculum is located one side of light source, nanometer diffuse scattering board is located the downside of speculum, color filter is located the downside of nanometer diffuse scattering board, the printing opacity lamp shade is located the downside of spectroscope and color filter, the light that the light source sent is collimated by the collimater, and the parallel light beam that obtains after the collimation evenly incides on the spectroscope, the spectroscope is refracted and is reflected the light that shines on it, wherein is shone behind the printing opacity lamp shade by the light that the spectroscope refracts, the light reflected by the light splitting mirror irradiates the reflecting mirror, the reflecting mirror reflects the received light to the nanometer diffuse scattering plate, the nanometer diffuse scattering plate is used for generating diffused scattering light, the generated diffused scattering light irradiates the color filter, the color filter is used for changing the color of the diffused light, and then the diffused scattering light is changed into the background light of the white light LED light source through the light-transmitting lampshade to present a diffused sky blue background.

The further technical scheme is as follows: the light source comprises a plurality of groups of white light LEDs which are arranged in an array, wherein the light source array is driven by a first motor and can move transversely relative to the collimator array so as to change the irradiation angle of the simulated natural light; the number of the collimators corresponds to that of the white light LEDs one to one, and the collimation array is driven by the second motor and can transversely move relative to the light source array, so that parallel light beams emitted by the white light LEDs are uniformly incident on the collimators.

The further technical scheme is as follows: the light source also comprises a plurality of shielding plates, and the shielding plates are arranged between each group of white light LEDs and used for isolating adjacent light sources and ensuring that each collimator receives light emitted by the corresponding white light LED.

The further technical scheme is as follows: a small surface angle prism is arranged on the surface of the spectroscope, and the angle of the simulated solar beam can be controlled by selecting the surface angle of the small surface angle prism; and the surface of the beam splitter is coated with a dielectric coating of a certain thickness to increase the transmittance.

The further technical scheme is as follows: the nanometer diffuse scattering plate is made by fusing titanium dioxide, zinc dioxide, nylon or PMMA nanometer pellets and acrylic resin, the diameter of the pellets is 20nm-100nm, incident collimated light forms Rayleigh scattering, the scattering intensity is in inverse proportion to the fourth power of wavelength, and background light mainly comprising blue light is generated.

The further technical scheme is as follows: the light source further comprises a controller, and the controller is used for controlling the first motor and the second motor to drive the light source array and the collimation array to act respectively, so that the change of the irradiation direction of the simulated sunlight rays is changed.

The further technical scheme is as follows: the white light LEDs comprise low-color-temperature white light LEDs with the color temperatures of 2000K-2700K and high-color-temperature white light LEDs with the color temperatures of 6000-7000K, the controller adjusts the color temperature of a light source required by illumination by controlling the size and the proportion of the driving currents of the low-color-temperature white light LEDs and the high-color-temperature white light LEDs, and the color temperature adjusting range is 2000K-7000K.

The further technical scheme is as follows: the system also comprises an illumination intensity sensor, wherein the illumination intensity sensor is connected with the signal input end of the controller, the controller is used for sensing the illumination intensity and the color temperature of sunlight on the same day through the illumination intensity sensor, and the controller is used for controlling the light source to change the illumination intensity and the color temperature generated by the light source, so that the indoor virtual sunlight is matched with the outdoor actual environment.

The further technical scheme is as follows: the system also comprises a heat gun which is used for generating hot air, and the heat gun is arranged at the opposite angle of the system, so that the incident direction of the hot air is always consistent with the irradiation angle of the simulated sunlight, and the warm feeling of the simulated sunlight when the simulated sunlight irradiates on the human body is achieved.

The further technical scheme is as follows: the system also comprises a camera, wherein the camera is arranged on one side of the artificial skylight, so that the detection range of the camera is the area during daily work; the signal output end of the camera is connected with the signal input end of the controller, and the camera is used for detecting whether people exist in a working area; when the camera detects that people exist in the working area, the controller controls the light source to keep the original brightness of the artificial skylight; if the camera does not detect the existence of the person, the controller controls the light source to reduce the brightness of the artificial skylight or turns off the light source.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the artificial skylight system can provide the following visual features to simulate a real skylight: 1) the solid angle of the artificial sun is the same as the solid angle of the real sun; 2) people can not feel the parallax phenomenon when watching the eyes directly; 3) artificial sky presents three-dimensional depth; 4) objects illuminated by the artificial sun produce penumbra and blue shadows; 5) the luminance ratio of the sunlight irradiation to the shadow area is comparable to the outdoor luminance ratio in the test; 6) the brightness can be automatically switched during work and rest; 7) automatically simulating the daylight color temperature, the illumination and the irradiation direction according to the weather and the time of the day; 8) simulating the warmth sensation a sun would have when shining on a person. In summary, the system can effectively provide artificial sunlight and diffuse blue sky light for rooms lacking natural light.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic block diagram of an artificial skylight system according to an embodiment of the present invention;

FIG. 2 is a partial functional block diagram of a system according to an embodiment of the present invention;

FIG. 3 is a partial functional block diagram of a system according to an embodiment of the present invention;

FIG. 4 is a flow chart of the system for automatically switching brightness during work and rest according to the embodiment of the present invention;

wherein: 1. the device comprises a light source 2, a collimator 3, a spectroscope 4, a reflector 5, a nanometer diffuse scattering plate 6, a color filter 7, a light-transmitting lampshade 8, an artificial skylight system 9, a camera 10, a detection working area 11, a shielding plate 12, a heat blower 13 and a white light LED.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1, the embodiment of the invention discloses an artificial skylight system, which is characterized in that: the artificial light source part is used for automatically simulating the color temperature, the illumination and the irradiation direction of sunlight according to weather and time of the day; automatically switching the brightness when the corresponding person has a rest or works; simulating the warmth sensation a person would have when the sun is shining on. The Rayleigh scattering part is used for reproducing a Rayleigh scattering process of sunlight passing through the atmosphere, and finally the effect of simulating a real skylight from visual characteristics is achieved. The artificial light source part comprises a light source 1, a collimator 2, a spectroscope 3 and a light-transmitting lampshade 7, and the Rayleigh scattering part comprises a reflector 4, a nanometer diffuse scattering plate 5 and a color filter 6. The collimator 2 is located on the lower side of the light source 1, the spectroscope 3 is located on the lower side of the collimator 2, the reflector 4 is located on one side of the light source 1, the nanometer diffuse scattering plate 5 is located on the lower side of the reflector 4, the color filter 6 is located on the lower side of the nanometer diffuse scattering plate 5, and the light-transmitting lampshade 7 is located on the lower sides of the spectroscope 3 and the color filter 6.

The light emitted by the light source 1 is collimated by the collimator 2, parallel light beams obtained after collimation are uniformly incident on the spectroscope 3, the spectroscope 3 refracts and reflects light irradiated on the spectroscope 3, wherein the light refracted by the spectroscope 3 passes through the light-transmitting lampshade 7 to be irradiated, the light reflected by the spectroscope 3 is irradiated on the reflector 4, the reflector 4 reflects the received light onto the nano diffuse scattering plate 5, the nano diffuse scattering plate 5 is used for generating diffuse scattered light, the generated diffuse scattered light is irradiated on the color filter 6, the color filter 6 is used for changing the color of the diffuse light, and then the diffuse scattered light is changed into background light of a white light LED light source through the light-transmitting lampshade 7 to be presented as a diffuse sky blue background.

Further, as shown in fig. 2, the light source 1 includes a plurality of groups of white LEDs 13 arranged in an array, wherein the light source array is driven by a first motor and can move transversely relative to the collimator array, so as to change the irradiation angle of the simulated natural light; the number of the collimators 2 corresponds to the number of the white light LEDs 13 one by one, and the collimation array is driven by a second motor and can move transversely relative to the light source array, so that parallel light beams emitted by the white light LEDs 13 are uniformly incident on the collimators. The collimator 2 may be a fresnel lens, an aspheric lens, or a free-form lens.

Further, the spectroscope 3 may be formed of a transparent material such as acrylic resin, PMMA, or the like, providing a plurality of angled reflection and transmission surfaces, the transmission light shining on the light-transmitting shade 7, the reflection light shining on the reflector 4, and then on the nano-diffusion plate 5; collimated light from the beam splitter 3 is directed to the observer through a light-transmitting shade 7 to produce simulated sunlight; the surface of the spectroscope 3 consists of prism facet angles, and the proper prism facet angle can be selected to control the angle of the simulated solar beam; the surface of which is coated with a dielectric coating (e.g., titanium oxide, silicon oxide, etc.) of a certain thickness to increase transmittance.

Further, as shown in fig. 2, the light source further includes a plurality of shielding plates 11, and the shielding plates 11 are disposed between each group of white LEDs 13 for isolating adjacent light sources and ensuring that each collimator 2 receives light emitted from the corresponding white LED 13.

Further, the nanometer diffuse scattering plate 5 is made by fusing titanium dioxide, zinc dioxide, nylon or PMMA nanometer pellets and acrylic resin, the diameter of the pellets is 20nm-100nm, incident collimated light forms Rayleigh scattering, the scattering intensity is in inverse proportion to the fourth power of the wavelength, and background light mainly comprising blue light is generated.

Further, the color filter 6 is used to make the diffused light as sky blue as possible, and then the diffused light is changed into the background light of the white LED light source through the transparent lampshade 7, and appears as a diffuse sky blue background.

Further, the light source 1 further comprises a controller, and the controller is configured to control the first motor and the second motor to drive the light source array and the collimation array to act, so as to change the change of the irradiation direction of the simulated sunlight.

Further, the white light LEDs 13 comprise low color temperature white light LEDs with color temperatures of 2000K-2700K and high color temperature white light LEDs with color temperatures of 6000-7000K, and the controller adjusts the color temperature of the light source required by illumination by controlling the magnitude and the proportion of the driving currents of the low color temperature white light LEDs and the high color temperature white light LEDs, wherein the color temperature adjusting range is 2000K-7000K.

Furthermore, the system also comprises an illumination intensity sensor, the illumination intensity sensor is connected with the signal input end of the controller, the controller is used for sensing the illumination intensity and the color temperature of sunlight on the same day through the illumination intensity sensor, and the controller is used for controlling the light source to change the illumination intensity and the color temperature generated by the light source, so that the indoor virtual sunlight is matched with the outdoor actual environment. For cloudy days, the virtual sunlight illumination can be automatically reduced, and the virtual sunlight color temperature is improved; and in sunny days, the virtual sunlight illumination is improved, and the virtual sunlight color temperature is reduced. At sunrise, the illumination and color temperature of the virtual sunlight can be adjusted to be lower; the illumination and the color temperature of the LED lamp can be gradually adjusted and increased along with the change of time, and can be gradually adjusted and reduced along with the change of time after the noon, and the color temperature is the lowest in sunset.

As shown in fig. 2, the system further comprises a heat gun 12, the heat gun 12 is used for generating hot air, and the heat gun 12 is installed at the opposite angle of the system, so that the incidence direction of the hot air is always consistent with the irradiation angle of the simulated sunlight, thereby achieving the warm feeling of the simulated sunlight on the human body.

As shown in fig. 3, the system further comprises a camera 9, which is installed at one side of the artificial skylight system 8, so that the detection range is the area during daily work; the signal output end of the camera 9 is connected with the signal input end of the controller, and the camera 9 is used for detecting whether a person exists in the working area 10; as shown in fig. 4, when the camera 9 detects that a person exists in the working area 10, the controller controls the light source to maintain the original brightness of the artificial skylight; if the camera 9 does not detect the presence of a person, the controller controls the light source to reduce the brightness of the artificial skylight, or turns off the light source.

The artificial skylight system can provide the following visual features to simulate a real skylight: 1) the solid angle of the artificial sun is the same as the solid angle of the real sun; 2) people can not feel the parallax phenomenon when watching the eyes directly; 3) artificial sky presents three-dimensional depth; 4) objects illuminated by the artificial sun produce penumbra and blue shadows; 5) the luminance ratio of the sunlight irradiation to the shadow area is comparable to the outdoor luminance ratio in the test; 6) the brightness can be automatically switched during work and rest; 7) automatically simulating the daylight color temperature, the illumination and the irradiation direction according to the weather and the time of the day; 8) simulating the warmth sensation a sun would have when shining on a person. In summary, the system can effectively provide artificial sunlight and diffuse blue sky light for rooms lacking natural light.

Claims

1. An artificial skylight system, characterized by: including the artificial light source part of simulation sunlight and the rayleigh scattering part of reappearing the skylight, artificial light source part includes light source (1), collimator (2), spectroscope (3) and printing opacity lamp shade (7), the rayleigh scattering part includes speculum (4), nanometer diffuse scattering board (5) and color filter (6), collimator (2) are located the downside of light source (1), spectroscope (3) are located the downside of collimator (2), speculum (4) are located one side of light source (1), nanometer diffuse scattering board (5) are located the downside of speculum (4), color filter (6) are located the downside of nanometer diffuse scattering board (5), printing opacity lamp shade (7) are located the downside of spectroscope (3) and color filter (6), the light that light source (1) sent is collimated by collimator (2), the collimated parallel light beams are uniformly incident on a spectroscope (3), the spectroscope (3) refracts and reflects light rays irradiated on the spectroscope, wherein the light rays refracted by the spectroscope (3) pass through a light-transmitting lampshade (7) and then are irradiated, the light rays reflected by the spectroscope (3) are irradiated on a reflector (4), the reflector (4) reflects the received light rays onto a nanometer diffuse scattering plate (5), the nanometer diffuse scattering plate (5) is used for generating diffused scattered light, the generated diffused light is irradiated on a color filter (6), the color filter (6) is used for changing the color of the diffused light, and then the diffused scattered light is changed into background light of a white light LED light source through the light-transmitting lampshade (7) and is presented as a diffuse sky blue background; the light source (1) comprises a plurality of groups of white light LEDs (13) which are arranged in an array, wherein the light source array is driven by a first motor and can move transversely relative to the collimator array so as to change the irradiation angle of the simulated natural light; the number of the collimators (2) corresponds to that of the white light LEDs (13) one by one, and the collimation array is driven by the second motor and can transversely move relative to the light source array, so that parallel light beams emitted by the white light LEDs (13) are uniformly incident on the collimators.

2. The artificial skylight system of claim 1, wherein: the light source also comprises a plurality of shielding plates (11), wherein the shielding plates (11) are arranged between each group of white light LEDs (13) and used for isolating adjacent light sources and ensuring that each collimator (2) receives light emitted by the corresponding white light LED (13).

3. The artificial skylight system of claim 1, wherein: a small surface angle prism is arranged on the surface of the spectroscope (3), and the angle of the simulated solar beam can be controlled by selecting the surface angle of the small surface angle prism; and the surface of the spectroscope (3) is coated with a dielectric coating with a certain thickness to increase the transmissivity.

4. The artificial skylight system of claim 1, wherein: the nanometer diffuse scattering plate (5) is made by fusing titanium dioxide, zinc dioxide, nylon or PMMA nanometer pellets and acrylic resin, the diameter of the pellets is 20nm-100nm, incident collimated light forms Rayleigh scattering, the scattering intensity is inversely proportional to the fourth power of the wavelength, and background light mainly comprising blue light is generated.

5. The artificial skylight system of claim 1, wherein: the light source (1) further comprises a controller, and the controller is used for controlling the first motor and the second motor to respectively drive the light source array and the collimation array to act so as to change the change of the irradiation direction of the simulated sunlight.

6. The artificial skylight system of claim 2, wherein: the white light LEDs (13) comprise low-color-temperature white light LEDs with the color temperatures of 2000K-2700K and high-color-temperature white light LEDs with the color temperatures of 6000-7000K, the controller adjusts the color temperature of a light source required by illumination by controlling the size and the proportion of the driving currents of the low-color-temperature white light LEDs and the high-color-temperature white light LEDs, and the color temperature adjusting range is 2000K-7000K.

7. The artificial skylight system of claim 1, wherein: the system also comprises an illumination intensity sensor, wherein the illumination intensity sensor is connected with the signal input end of the controller, the controller is used for sensing the illumination intensity and the color temperature of sunlight on the same day through the illumination intensity sensor, and the controller is used for controlling the light source to change the illumination intensity and the color temperature generated by the light source, so that the indoor virtual sunlight is matched with the outdoor actual environment.

8. The artificial skylight system of claim 1, wherein: the system also comprises a heat gun (12), wherein the heat gun (12) is used for generating hot air, and the heat gun (12) is arranged at the opposite angle of the system, so that the incident direction of the hot air is always consistent with the irradiation angle of the simulated sunlight, and the warm feeling of the simulated sunlight on the human body is achieved.

9. The artificial skylight system of claim 1, wherein: the system also comprises a camera (9), wherein the camera is arranged on one side of the artificial skylight system (8), so that the detection range of the camera is the area during daily work; the signal output end of the camera (9) is connected with the signal input end of the controller, and the camera (9) is used for detecting whether a person exists in the working area (10); when the camera (9) detects that people exist in the working area (10), the controller controls the light source to keep the original brightness of the artificial skylight; if the camera (9) cannot detect the existence of people, the controller controls the light source to reduce the brightness of the artificial skylight or turns off the light source.