CN109027798B - Artificial skylight system - Google Patents

Abstract

The invention discloses an artificial skylight system, which relates to the field of optoelectronic technology. The system mainly includes two parts: an artificial light source that simulates sunlight and a Rayleigh scattering structure that reproduces sky light. The invention first uses devices such as light source, collimator, beam splitter, light-transmitting lampshade to simulate sunlight, and automatically simulates the color temperature, illuminance and irradiation direction of sunlight according to the weather and time of the day; automatically switches when the corresponding person is resting or working. Brightness; simulates the warm feeling of sunlight shining on a person. The Rayleigh scattering process of sunlight passing through the atmosphere is reproduced through nano-diffuse diffuser plates, color filters, and light-transmitting lampshades, thereby simulating the effect of a real skylight.

Description

Artificial skylight system

technical field

The invention relates to the field of optoelectronic technology, in particular to an artificial skylight system.

Background technique

Recent research has clearly shown that people perform better and feel more comfortable in indoor environments with daylight. There is convincing evidence that sunlight exposure reduces work stress and negative effects, enhances mood and productivity, and in the long run improves the physical and mental health of people living indoors.

However, some rooms cannot allow sunlight to come in due to various factors. At this time, artificial skylights play an important role. Capable of creating a virtual sun and diffuse blue sky and can be installed in offices or other rooms without natural ambient light, artificial skylights offer architects and lighting engineers the option to create new and otherwise unavailable lighting effects. Also, many offices and rooms may look claustrophobic when there is no apparent view of the outside world, but the application of artificial skylights can help alleviate this problem.

In addition, artificial skylights do not emit infrared radiation, which reduces the burning sensation on people's skin, and the UV dose emitted by artificial skylights is negligible compared to natural sunlight exposure.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is how to provide an artificial skylight system that can effectively provide artificial sunlight and diffuse blue sky light for rooms lacking natural light.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present invention is: an artificial skylight system, which is characterized in that: it includes an artificial light source part for simulating sunlight and a Rayleigh scattering part for reproducing sky light, and the artificial light source part includes A light source, a collimator, a beam splitter and a light-transmitting lampshade, the Rayleigh scattering part includes a reflector, a nano-diffuse scattering plate and a color filter, the collimator is located on the lower side of the light source, and the beam splitter is located on the lower side of the collimator, the reflector is located on one side of the light source, the nano diffuse scattering plate is located on the lower side of the reflector, and the color filter is located on the nano diffuse scattering plate The light-transmitting lampshade is located on the lower side of the beam splitter and the color filter, the light emitted by the light source is collimated by the collimator, and the collimated parallel beam is uniformly incident on the beam splitter. On the mirror, the spectroscope refracts and reflects the light irradiated thereon, wherein the light refracted by the spectroscope passes through the light-transmitting lampshade for irradiation, and the light reflected by the spectroscope irradiates the On the reflector, the reflector reflects the received light onto the nano diffuse diffuser plate, the nano diffuse diffuser plate is used to generate diffuse diffuse light, and the generated diffuse diffuse light is irradiated on the color filter, and the color is The filter is used to change the color of the diffused light, and then the diffused diffused light is turned into the background light of the white LED light source through the light-transmitting lampshade, presenting a diffuse sky blue background.

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

A further technical solution is that: the light source further includes a plurality of shielding plates, and the shielding plates are placed between each group of white light LEDs to isolate adjacent light sources and ensure that each collimator receives the light emitted from the corresponding white light LEDs. Light.

A further technical solution is that: the surface of the beam splitter is provided with a facet angle prism, and the face angle of the facet angle prism can be selected to control the angle of the simulated sun beam; and the surface of the beam splitter is coated with a certain thickness of dielectric. coating to increase transmittance.

A further technical solution is: the nano diffuse scattering plate is made of titanium dioxide, zinc dioxide, nylon or PMMA nano balls and acrylic resin fusion, the ball diameter is 20nm-100nm, the incident collimated light forms Rayleigh scattering, scattering The intensity is inversely proportional to the fourth power of the wavelength, producing a background light dominated by blue light.

A further technical solution is: the light source further includes a controller, the controller is used to control the first motor and the second motor to drive the light source array and the collimating array to act respectively, so as to change the illumination of the simulated sunlight. change of direction.

A further technical solution is: the white light LED includes a low color temperature white light LED with a color temperature of 2000K-2700K and a high color temperature white light LED with a color temperature of 6000-7000K, and the controller controls the driving current of the low color temperature white light LED and the high color temperature white light LED. Proportion to adjust the color temperature of the light source required for lighting, the color temperature adjustment range is 2000K-7000K.

A further technical solution is: the system further includes an illumination intensity sensor, the illumination intensity sensor is connected to the signal input end of the controller, and the controller uses the illumination intensity sensor to sense the illuminance and color temperature of the sunlight on the day, and pass the illumination intensity sensor. The controller controls the light source to change the illuminance and color temperature generated by the light source, so that the indoor virtual sunlight matches the actual outdoor environment.

A further technical solution is: the system further includes a hot air heater, which is used to generate hot air, and the hot air device is installed at the opposite corner of the system, so that the incident direction of the hot air is always consistent with the irradiation angle of the simulated sunlight, so that the Achieving a warm feeling that simulates the sun shining on a person.

A further technical solution is: the system further includes a camera, the camera is installed on one side of the artificial skylight, so that the detection range is the area during daily work; the signal output end of the camera is connected with the signal input end of the controller. , the camera is used to detect whether there are people in the work area; when the camera detects the presence of people in the work area, the controller controls the light source to maintain the original brightness of the artificial skylight; if the camera does not detect the existence of people, the controller controls the light source to reduce the brightness of the artificial skylight , or turn off the light source.

The beneficial effect of adopting the above technical solution is that: the artificial skylight system can provide the following visual characteristics to imitate the real skylight: 1) the solid angle of the artificial sun is the same as that of the real sun; 2) people feel that when staring directly No parallax phenomenon; 3) Artificial sky presents three-dimensional depth; 4) Objects illuminated by artificial sun produce penumbra and blue shadows; 5) Brightness ratio of sunlit to shaded areas is comparable to ambient and outdoor brightness ratios in testing 6) Can automatically switch the brightness during work and rest; 7) Automatically simulate sunlight color temperature, illuminance and irradiation direction according to the weather and time of the day; 8) Simulate the warm feeling that the sun will have when it shines on people. In conclusion, the system can effectively provide artificial daylight and diffuse blue sky light for rooms lacking natural light.

Description of drawings

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

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

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

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

Fig. 4 is the flow chart that the system according to the embodiment of the present invention automatically switches the brightness when working and resting;

Among them: 1, light source 2, collimator 3, beam splitter 4, reflector 5, nano-diffuse diffuser plate 6, color filter 7, light-transmitting lampshade 8, artificial skylight system 9, camera 10, detection work area 11, Blocking plate 12, air heater 13, white LED.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

As shown in FIG. 1 , an embodiment of the present invention discloses an artificial skylight system, which is characterized in that it includes an artificial light source part and a Rayleigh scattering part, and the artificial light source part is used to automatically simulate the color temperature, illuminance and intensity of sunlight according to the weather and time of the day. Lighting direction; automatically switch the brightness when the corresponding person is resting or working; simulate the warm feeling when the sun shines on people. The Rayleigh scattering part is used to reproduce the Rayleigh scattering process of sunlight passing through the atmosphere, and finally achieve the effect of imitating a real skylight from visual features. The artificial light source part includes a light source 1 , a collimator 2 , a beam splitter 3 and a light-transmitting lampshade 7 , and the Rayleigh scattering part includes a reflector 4 , a nano-diffuse scattering plate 5 and a color filter 6 . The collimator 2 is located on the lower side of the light source 1, the beam splitter 3 is located on the lower side of the collimator 2, the reflector 4 is located on one side of the light source 1, and the nano diffuse scattering The plate 5 is located on the lower side of the reflector 4 , the color filter 6 is located on the lower side of the nano-diffuse scattering plate 5 , and the light-transmitting lampshade 7 is located between the beam splitter 3 and the color filter 6 . underside.

The light emitted by the light source 1 is collimated by the collimator 2, and the parallel beam obtained after the collimation is uniformly incident on the spectroscope 3, and the spectroscope 3 refracts and reflects the light irradiated thereon, The light refracted by the spectroscope 3 passes through the light-transmitting lampshade 7 and then irradiated, and the light reflected by the spectroscope 3 is irradiated on the reflector 4, and the reflector 4 reflects the received light to the On the nano-diffuse diffuser plate 5, the nano-diffuse diffuser plate 5 is used to generate scattered diffused light, and the generated diffused diffused light is irradiated on the color filter 6, and the color filter 6 is used to change the color of the diffused light. , and then the diffuse scattered light is transformed into the background light of the white LED light source through the light-transmitting lampshade 7, which presents a diffuse sky-blue background.

Further, as shown in FIG. 2 , the light source 1 includes a plurality of groups of white light LEDs 13 arranged in an array, wherein the light source array is driven by a first motor and can move laterally relative to the collimator array, thereby changing the simulated natural light intensity. Irradiation angle; the number of the collimators 2 is in one-to-one correspondence with the white LEDs 13, and the collimation array is driven by a second motor and can move laterally relative to the light source array, so that the parallel beams emitted by the white LEDs 13 are uniform incident on the collimator. The collimator 2 may be a Fresnel lens, an aspheric lens, or a free-form surface lens.

Further, the spectroscope 3 can be formed of transparent materials such as acrylic resin, PMMA, etc., providing a plurality of angled reflection and transmission surfaces, the transmitted light shines on the light-transmitting lampshade 7, the reflected light shines on the reflector 4, and then shines on the nano diffuser. On the shooting plate 5; the collimated light from the beam splitter 3 is guided to the observer through the light-transmitting lampshade 7 to generate simulated sunlight; the surface of the beam splitter 3 is composed of prism facet angles, and the appropriate prism facet angle can be selected to control the simulation The angle of the sun beam; its surface is coated with a certain thickness of dielectric coating (eg titanium oxide, silicon oxide, etc.) to increase the transmittance.

Further, as shown in FIG. 2 , the light source further includes a plurality of shielding plates 11, and the shielding plates 11 are placed between each group of white light LEDs 13 to isolate adjacent light sources and ensure that each collimator 2 receives From the light emitted from the corresponding white light LED13.

Further, the nano-diffuse scattering plate 5 is made of titanium dioxide, zinc dioxide, nylon or PMMA nano-spheres and acrylic resin fusion, the diameter of the spheres is 20nm-100nm, the incident collimated light forms Rayleigh scattering, and the scattering intensity is the same as The fourth power of wavelength is inversely proportional to produce background light dominated by blue light.

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

Further, the light source 1 further includes a controller, which is used to control the first motor and the second motor to drive the light source array and the collimating array to act respectively, so as to change the irradiation direction of the simulated sunlight. Change.

Further, the white light LED 13 includes a low color temperature white light LED with a color temperature of 2000K-2700K and a high color temperature white light LED with a color temperature of 6000-7000K, and the controller adjusts by controlling the drive current size and ratio of the low color temperature white light LED and the high color temperature white light LED. The color temperature of the light source required for lighting, the color temperature adjustment range is 2000K-7000K.

Further, the system also includes a light intensity sensor, the light intensity sensor is connected to the signal input end of the controller, the controller uses the light intensity sensor to sense the illuminance and color temperature of the sunlight on the day, and controls the light intensity through the controller. The light source is used to change the illuminance and color temperature generated by the light source, so that the indoor virtual sunlight matches the actual outdoor environment. On cloudy days, it will automatically reduce the virtual sunlight and increase the virtual sunlight color temperature; on sunny days, increase the virtual sunlight and reduce the virtual sunlight color temperature. At sunrise, the illuminance and color temperature of the virtual sunlight will be adjusted to a lower level; with the change of time, the illuminance and color temperature will be gradually adjusted to increase, and after noon, the illuminance and color temperature will gradually change with time. The adjustment is lowered, and the color temperature is lowest at sunset.

As shown in FIG. 2 , the system further includes a hot air heater 12, which is used to generate hot air. The hot air heater 12 is installed at the opposite corner of the system, so that the incident direction of the hot air is always kept with the irradiation angle of the simulated sunlight. Consistent, so as to simulate the warm feeling when the sun shines on the human body.

As shown in FIG. 3 , the system further includes a camera 9, which is installed on one side of the artificial sunroof system 8, so that its detection range is the area during daily work; the signal output end of the camera 9 is connected to the The signal input end is connected, and the camera 9 is used to detect whether there is someone in the work area 10; as shown in Figure 4, when the camera 9 detects the presence of someone in the work area 10, the controller controls the light source to maintain the original brightness of the artificial skylight; if the camera 9 If no human presence is detected, the controller controls the light source to reduce the brightness of the artificial skylight, or turn off the light source.

The artificial skylight system can provide the following visual characteristics to imitate a real skylight: 1) the solid angle of the artificial sun is the same as that of the real sun; 2) people do not perceive parallax phenomenon when staring directly; 3) the artificial sky presents three-dimensional Depth; 4) Penumbra and blue shadows produced by objects illuminated by artificial sun; 5) Brightness ratio of sunlit to shaded areas comparable to ambient and outdoor brightness ratios in testing; 6) Ability to automatically switch between work and rest Brightness; 7) Automatically simulate sunlight color temperature, illuminance and irradiation direction according to the weather and time of the day; 8) Simulate the warm feeling that the sun will have when it shines on people. In conclusion, the system can effectively provide artificial daylight and diffuse blue sky light for rooms lacking natural light.

Claims (9)

1. An artificial skylight system, characterized in that: it comprises an artificial light source part for simulating sunlight and a Rayleigh scattering part for reproducing sky light, the artificial light source part comprising a light source (1), a collimator (2), a beam splitter a mirror (3) and a light-transmitting lampshade (7), the Rayleigh scattering part includes a reflector (4), a nano-diffuse scattering plate (5) and a color filter (6), the collimator (2) is located at On the lower side of the light source (1), the beam splitter (3) is located on the lower side of the collimator (2), the reflector (4) is located on one side of the light source (1), and the The nano 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 nano diffuse scattering plate (5), and the light-transmitting lampshade (7) Located on the lower side of the beam splitter (3) and the color filter (6), the light emitted by the light source (1) is collimated by the collimator (2), and the collimated parallel beam is uniform Incident on the beam splitter (3), the beam splitter (3) refracts and reflects the light irradiated thereon, wherein the light refracted by the beam splitter (3) passes through the light-transmitting lampshade (7) irradiating, the light reflected by the beam splitter (3) is irradiated on the reflector (4), and the reflector (4) reflects the received light onto the nano diffuse scattering plate (5), the The nano diffuse diffuser plate (5) is used for generating scattered diffused light, the generated diffused diffused light is irradiated on the color filter (6), and the color filter (6) is used for changing the color of the diffused light, and then through the transparent The light shade (7) turns the diffuse scattered light into the background light of the white LED light source, presenting a diffuse sky blue background; the light source (1) comprises a plurality of groups of white LEDs (13) arranged in an array, wherein the light source array is composed of Driven by the first motor, it can move laterally relative to the collimator array, so as to change the illumination angle of the simulated natural light; the number of the collimators (2) corresponds to the white light LEDs (13) one-to-one, and the collimator is collimated The array is driven by the second motor and can move laterally relative to the light source array, so that the parallel light beams emitted by the white light LEDs (13) are uniformly incident on the collimator. 2. The artificial skylight system according to claim 1, wherein the light source further comprises a plurality of shielding plates (11), and the shielding plates (11) are placed between each group of white light LEDs (13), Used to isolate adjacent light sources, ensuring that each collimator (2) receives light from the corresponding white LED (13). 3. The artificial skylight system according to claim 1, characterized in that: the surface of the beam splitter (3) is provided with a facet angle prism, and the facet angle of the facet angle prism can be selected to control the angle of the simulated sun beam; and The surface of the beam splitter (3) is coated with a dielectric coating of a certain thickness to increase the transmittance. 4. The artificial skylight system according to claim 1, characterized in that: the nano diffuse diffuser plate (5) is made of titanium dioxide, zinc dioxide, nylon or PMMA nano-spheres fused with acrylic resin, and the diameter of the spheres is 20nm -100nm, the incident collimated light forms Rayleigh scattering, and the scattering intensity is inversely proportional to the fourth power of the wavelength, resulting in a background light dominated by blue light. 5. The artificial skylight system according to claim 1, characterized in that: 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 light source array respectively. Collimating the array action to change the direction of illumination of the simulated sunlight. 6. The artificial skylight system according to claim 2, wherein the white light LED (13) comprises a low color temperature white light LED with a color temperature of 2000K-2700K and a high color temperature white light LED with a color temperature of 6000-7000K. The color temperature of the light source required for lighting is adjusted by the drive current size and ratio of the color temperature white LED and the high color temperature white LED, and the color temperature adjustment range is 2000K-7000K. 7. The artificial skylight system according to claim 1, wherein the system further comprises a light intensity sensor, the light intensity sensor is connected with the signal input end of the controller, and the controller uses the light intensity sensor to use The illuminance and color temperature of the sunlight on the day are sensed, and the light source is controlled by the controller to change the illuminance and color temperature generated by the light source, so that the indoor virtual sunlight matches the actual outdoor environment. 8. The artificial skylight system according to claim 1, characterized in that: the system further comprises a heater (12), the heater (12) is used to generate hot air, and the heater (12) is installed on the opposite side of the system. At the corner, the incident direction of the hot air is always consistent with the irradiation angle of the simulated sunlight, so as to achieve the warm feeling when the simulated sunlight hits the human body. 9. The artificial skylight system according to claim 1, characterized in that: the system further comprises a camera (9), and the camera is installed on one side of the artificial skylight system (8), so that the detection range of the camera is during daily work The signal output end of the camera (9) is connected to the signal input end of the controller, and the camera (9) is used to detect whether someone exists in the working area (10); when the camera (9) detects the working area (10) ) When someone exists, the controller controls the light source to maintain the original brightness of the artificial skylight; if the camera (9) cannot detect the presence of a person, the controller controls the light source to reduce the brightness of the artificial skylight, or turn off the light source.

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