The present invention relates to the daylight input for aircraft and, in particular, an aircraft with a daylight input system, a method for utilizing daylight in the interior of an aircraft and the use of a daylight input system in an aircraft.
In order to provide a desired brightness in interior spaces of aircraft, artificial light sources are provided within the cabin space, which light sources can be activated on demand. In aircraft for the transport of passengers, such as airliners, additional light is also required in the cabin interior space at sufficient brightness in the surrounding because the available window openings are not only relatively small, but also arranged relatively low referred to the cabin interior space, since they predominantly serve for the view of the passengers and therefore are arranged at the height of the passenger's head or slightly thereunder such that the passenger can look down to the earth during the flight. It is generally known that the size of the window openings is limited for static reasons. In air freighters that typically do not comprise any window openings except in the cockpit, artificial light is provided for sufficient illumination, particularly during loading and unloading processes. In passenger aircraft, in particular, additional light sources are also required for the duration of the flight in daytime for comfort reasons while only reduced illumination of the cabin interior is required in the nighttime, at least during the majority of the flying time. The required light sources in the cabin interior consist of electrically operated artificial light sources. The increased demands with respect to the quality of the time spent in the cabin area have also caused the demand for additional light sources to increase beyond the necessary safety amount. However, it has been shown that this is associated with a significant power demand, namely even if modern lamps are used, wherein this power demand needs to be provided aboard the aircraft. For this purpose, separate generator devices need to be operated or the on-board generators that are connected to the aircraft turbines or other propulsion devices need to supply the correspondingly increased power. However, this means additional weight, in particular, due to the fuel to be stored for this purpose. The additional light sources require significant extra effort with respect to their installation and wiring and also mean an increase in weight.
An aspect of the present invention may provide an improved illumination with a reduced energy demand.
According to an aspect of the invention, an aircraft with a fuselage construction, at least one interior area arranged within the fuselage construction and a daylight input system is provided. The daylight input system comprises at least one light receiving device arranged in an outer wall, at least one light guiding device and at least one light emitting device arranged on the inner side. The light receiving device is designed to receive daylight present in the surrounding outside an outer wall and transmit the same into the light guiding device. The light guiding device optically couples the light receiving device to the light emitting device. The light emitting device is designed to emit the daylight into an interior space on an inner side of a wall construction, wherein at least a partial deflection of the daylight takes place.
In this way, an improved illuminating situation is made available that has a reduced energy demand and therefore provides economical and ecological advantages for the operation of the aircraft.
The term “aircraft” refers, in particular, to airplanes, e.g. airliners. Furthermore, this term also refers to helicopters or airships.
The interior space consists, for example, of a cabin area or cabin interior space. However, the term interior space may also refer to secondary rooms or room segments within the aircraft, e.g. separated sanitary zones or sleeping zones for the crew.
The term “emitting daylight” comprises, for example, the emission of light into the interior space or onto surrounding surfaces of the interior space or surfaces within the cabin area. In any case, daylight is made available to the interior space.
The light receiving device is arranged, for example, on an outer side of the outer wall. The light receiving device may also be referred to as light capturing device and the light emitting device may also be referred to as light discharging device.
The daylight input system may comprise several light receiving devices, wherein a light receiving device may also comprise several individual light receiving elements. Furthermore, several light guiding devices may also be provided and one light guiding device may comprise several light guiding elements. Further, several light emitting devices may also be provided and one light emitting device may comprise several light emitting elements.
According to an exemplary embodiment, the light guiding device of the daylight input system extends in a wall construction between the outer side and the inner side of the fuselage construction. For example, the light receiving device and the light emitting device are arranged offset to one another.
In this way, daylight can be made available at suitable locations. The reception or capture of light can be realized at constructively favorable locations, wherein this primarily refers to the fuselage being subjected to very high static loads during flight operations and any opening in the hull must be adapted to the static assemblage. Due to the offset of light reception and light emission, the most favorable positions can be respectively used.
For example, the light emission takes place offset to the window surfaces. According to an example, the light emission is provided above cabin windows.
According to an exemplary embodiment, a window construction is inserted into an opening of the outer wall and the light receiving device is arranged in the opening.
The combination not only means advantages with respect to space requirement and installation, but also minimizes additional weight caused by the daylight input system. Another important consideration can be seen in that the integrative design in the outer skin makes it unnecessary to take any other sealing measures, because in aircraft design besides the seal against moisture and wind, also very high pressure differentials occur between the surroundings and the cabin space.
For example, the light receiving device is integrated into a window construction.
According to an exemplary embodiment, the window construction comprises an outer receiving surface that is larger than a look-through surface of the window by a projecting area, wherein the light receiving device is provided in the projecting area.
In this way, the extra effort for the utilization of daylight is reduced to a minimum; for example, the same size of opening in the fuselage can be utilized, but the transparent area of the window that predominantly serves for the view of the passengers can be realized slightly smaller.
The light receiving device is arranged, for example, outside the look-through or transparent area.
The window construction comprises, for example, an enlarged outer pane, wherein the light receiving device is arranged behind the enlarged outer pane.
For example, the opening of the outer wall is utilized to a certain extent for the light receiving device of the daylight input system and to a far greater extent for the window function, i.e. the opportunity of a view from the cabin.
According to an exemplary embodiment, the light receiving device of the daylight input system couples a first portion of the incident daylight into the light guiding device and a second portion of the incident daylight reaches the interior through the window opening.
For example, a semi-prism is provided in the border region of a window and indeed couples a largest possible portion of the incident daylight possible into the light guiding device, i.e. does not allow this daylight to be directly incident into the cabin space, but also enables a portion of the daylight to reach the interior such that the optical effect creates the impression of a larger window opening.
For example, the light receiving device and the light guiding device are realized in the form of a lens construction, e.g. with reflection surfaces, in order to guide daylight onto a surface to be illuminated.
According to an exemplary embodiment, the light receiving device of the daylight input system is arranged in lateral border areas of adjacent windows, wherein a rib extends vertically between the windows. The light emitting device is arranged on the inner side in front of the rib.
The area in front of the rib therefore receives light from the right side and from the left side. The light guiding device extends, for example, in the horizontal direction of the fuselage and/or also in the vertical direction. The light receiving devices may be arranged laterally of the window, wherein the light guiding device extends, for example, vertically upward and the light emitting device is arranged above the window. The light receiving device is arranged, for example, in the area around the window, wherein the light emission is realized above and/or below the window.
The light guiding device may comprise, for example, flexible optical fibers and may be adapted to an aircraft contour. The adaptation also includes bypassing structural components, because the cabin walls usually have a compact and dense wall structure with relatively high complexity. The light guiding device comprises, for example, optical fibers, prisms and/or mirrors. The light guiding device may be angled several times. The light guiding device may also be realized such that it can be focused. For example, the light guiding device is applied particularly thin and has a low weight. The light guiding device preferably absorbs as little energy as possible.
In another example, the light guiding device is realized such that it can be a dimmed in order to provide enhanced user comfort.
The light guiding device may comprise a junction in order to couple incident light into a device for so-called Energy Harvesting, i.e. for guiding the light to photovoltaic elements in order to locally generate electric energy for a local consumer, e.g. a control or measuring device or an actuating element accommodated in the wall construction.
According to an exemplary embodiment, the light emitting device of the daylight input system forms a concealed light source.
The term “concealed” refers, e.g. to the light source not being visible to a user such as, for example, the passenger and only the surface irradiated or illuminated by the light output unit being visible.
The light output unit is realized with a feed unit for feeding the light into a panel light. For example, the panel light may be additionally utilized as a backlit advertising area.
According to an exemplary embodiment, the light emitting device of the daylight input system comprises a light output unit that can be closed with a cover element.
For example, the cover element is a lining segment that can be slided by a passenger.
According to an exemplary embodiment, the light emitting device of the daylight input system comprises a light output unit, wherein an artificial light source is provided such that the artificial light source can emit artificial light into the interior space via the light output unit.
The input of daylight may be coupled with the irradiation of artificial light. For example, the emission of daylight and the emission of artificial light are realized in a superimposed fashion. The emission of daylight and the emission of artificial light may also be realized in adjacent areas of the light emitting device.
The light output unit may comprise, for example, a reflection area that can be irradiated with the fed in daylight in order to illuminate the interior space. The reflection area may also be irradiated with artificial light in order to illuminate the interior space.
The light emitting device may comprise, for example, a translucent surface that is irradiated with fed in daylight from the rear. For example, the translucent surface can also be irradiated with artificial light on the rear side. The terms “rear” and “rear side” respectively refer to the surface that faces away from the cabin space.
The reflection area may consist of a surface that is arranged above passenger seats such as, for example, an underside of a passenger supply unit (PSU).
The artificial light source may be arranged such that it is invisible to the user.
The light guiding device comprises, for example, at least one light guiding element such as a light guiding with a reflective coating on its inner side.
According to an exemplary embodiment, the light emitting device of the daylight input system is arranged above a window.
The light emitting device may be arranged, for example, in a wall paneling above the window or above the window framing. The light emitting device may also be integrated into the window frame lining.
According to an exemplary embodiment, the transmission of daylight through the window opening can be controlled independently of the emission of daylight by the light emitting device.
For example, the window can be covered with an obscuration element that has no influence at all on the daylight input in its different positions. The obscuration element may also consist of a pane, the light transmittance (transmittance) of which can be controlled, e.g. a pane of electrochromic glass, LC-glass (liquid-crystal glass) or PDLC-glass (polymer-dispersed-liquid-crystal glass).
According to an exemplary embodiment, the light emitting device of the daylight input system is arranged in the interior such that an inner side of the outer wall can be irradiated with the light to be emitted.
For example, the light emitting device is arranged on an underside of an overhead luggage compartment and the luminous radiation to be emitted is projected in the direction of the lateral wall surface onto the wall regions above the window.
According to an exemplary embodiment, a window construction is inserted into an opening of the outer wall and the light receiving device is arranged in an expansion of the opening.
The expansion may be arranged, for example, above the window opening and be significantly smaller than the window opening, e.g., such that it only amounts to no more than 25% or 10% of the size of the window opening.
According to an exemplary embodiment, the light receiving device of the daylight input system comprises at least one light receiving opening in the enveloping surface, through which opening the daylight reaches the light guiding device arranged on the inner side.
The at least one light receiving opening may be arranged on the upper side of a fuselage construction. For example, the at least one light receiving opening is centrally arranged in the crown or apex area of the fuselage, wherein the light guiding device laterally deflects the daylight, and wherein the light emitting device is arranged laterally offset referred to the light receiving opening.
The light emitting device may be arranged, for example, above aisle areas. The light emitting device is arranged, e.g., in the ceiling area of entrance/exit zones.
According to an exemplary embodiment, the light receiving device of the daylight input system comprising at least one projection that protrudes from the outer side of the aircraft.
For example, the light receiving device features at least one fin that extends in the longitudinal direction on the outer side of the fuselage, wherein the fin has a receiving surface that is larger than a contact surface of the fin on the outer wall surface.
According to an exemplary embodiment, the outer wall comprises a plurality of embedded optical waveguides that protrude from the outer side to the inner side of the enveloping surface and that couple the daylight into the light guiding device.
For example, optical fibers extending transverse to the enveloping surface are provided in the wall construction, i.e., in the fuselage hull. The direction, in which the fibers extend, may vary, for example, in dependence on their position on the fuselage.
In a multilayer structure, a plurality of light guiding elements may be provided in each layer such that the light guiding elements of adjacent layers at least partially overlap one another and a light transmission from the outside toward the inside can be realized. In a GLARE-construction (glass-fiber reinforced aluminum), for example, a plurality of embedded glass fiber segments is provided in each of the layers.
According to an exemplary embodiment, the light receiving device of the daylight input system comprising at least one light guiding film, wherein the film is connected to at least one optical coupling device that couples the light from the film into the light guiding device.
According to another of the invention, a method for utilizing daylight in the interior of an aircraft is proposed, wherein the method comprises the following steps:
According to yet another aspect of the invention, the use of a daylight input system according to one of the above-described exemplary embodiments in an aircraft is also provided. The inventive daylight input system features the characteristics of one or several of the above-described examples.
According to still further aspect of the invention, it is provided that a further portion of daylight can reach the interior space of an aircraft in addition to the daylight incident through the window surfaces that are relatively small for construction-related reasons. For this purpose, a “collection” of daylight in the surroundings is also carried out, for example, in connection with the already provided window openings in the fuselage construction and the collected daylight is then guided to corresponding locations within the cabin of light guiding elements such that additional daylight is available at these locations. For example, the lateral wall surfaces of the windows or even a slight expansion of the window openings can be used for the daylight input into the system. In addition, it would also be possible to slightly reduce the actual window construction, i.e., the look-through surface, in order to provide a surface area, in which the daylight is fed into the daylight system. Different concepts may be considered for the emission of the light into the interior. For example, an emitting device may be accommodated in the cabin wall panels or ceiling panels similar to an artificial light source, wherein these emitting devices subsequently have the appearance of luminous or light-emitting areas. In addition, daylight from the daylight input system can also be used for irradiating areas that subsequently emit light into the interior, for example, through light-diffusing surfaces in the form of luminous areas. According to another exemplary concept, translucent surfaces can also be irradiated with the fed in daylight from the rear in order to have the appearance of bright areas or surface areas of the cabin hull. For example, the surfaces or areas for the light emission may be arranged above the window areas and, in particular, above the passenger areas in order to distribute the additionally fed in daylight within the cabin area in the best possible fashion. In addition to the combination with window openings, it would also be possible to provide other openings that, however, are only relatively small due to the supporting function of the fuselage construction and to utilize these openings for respectively feeding daylight from the surroundings into the aircraft or into a daylight input system. For example, devices with an enlarged surface may be provided for collecting the daylight in order to subsequently guide the daylight into the fuselage construction in a collimated fashion by a highly compact optical waveguide such that the stability of the fuselage construction respectively is only negligibly weakened or not impaired. For example, daylight to be subsequently fed into the fuselage construction can be collected in a particularly efficient fashion in the apex area of the fuselage construction. However, since central supply lines are frequently arranged in this region, the light cannot be directly emitted into the interior at these locations, but rather is laterally deflected by light redirecting measures in order to be subsequently emitted into the interior in an offset fashion.
According to another aspect of the invention, the utilization of the fed in daylight represents an energy-saving measure because it reduces the demand for artificial light. In addition to the illuminating function, however, it also becomes possible to create a light situation in the cabin area that at least partially reflects the predominant light situation outside the aircraft. In connection with the combination with artificial light, excessive fluctuations outside the aircraft can be at least somewhat dampened, but still projected into the interior in such a way that the passenger experiences enhanced comfort and well-being. In addition, the utilization of daylight represents another component of the cabin equipment and therefore expands the corporate image of an airline. It should ultimately also be noted that the utilization of daylight typically involves a certain rhythm, dynamic or light color as well such that largely natural light conditions that are adapted to the so-called natural rhythm and capable of supporting the phases of human performance are made available in the interiors of aircraft, particularly passenger aircraft, wherein this is also associated with physical health and well-being, as well as motivation, but these particular aspects are not discussed in greater detail. In this case, particularly the varying light color of the fed in daylight leads to a comfort enhancement for the user.
It should be noted that the characteristics of the exemplary embodiments and aspects of the devices or of the aircraft, as well as of the daylight input system, also apply to embodiments of the method and of the utilization of the system and vice versa. In addition, it is also possible to freely combine characteristics, in reference to which this is not explicitly mentioned.
Exemplary embodiments of the invention are described in greater detail below with reference to the attached drawings. In these drawings:
According to an example, the light guiding device 38 extends in a wall construction, i.e., in the fuselage construction 12, between the outer side and the inner side and the light receiving device 36 and the light emitting device 40 are arranged offset to one another as indicated in an exemplary fashion in
According to an exemplary embodiment that is not shown in greater detail, the light receiving device 36 is realized in such a way that a first portion of the incident daylight is coupled into the light guiding device and a second portion of the incident daylight reaches the interior through the window opening. For example, a semi-prism is provided for this purpose and arranged in the edge region of the window such that the impression of a larger window opening is created at this location although the direct transparency, i.e., the transparent area, is slightly restricted due to the utilization of daylight.
The light receiving device 36 may also be realized peripherally in the form of individual light receiving elements 62 such that a wall region 64 can be irradiated with fed in daylight from the rear peripherally around the window opening. It should be noted that
In the utilization of daylight according to
According to the exemplary embodiment illustrated in the form of a horizontal section in
To this end,
It should be noted that, according to the invention, the combination with artificial light sources can also be realized in the other exemplary embodiments, i.e., the combination with artificial light is by no means restricted to the examples, in reference to which this combination is explicitly mentioned.
It was already mentioned above that, according to an exemplary embodiment, the daylight entry through the window opening can be controlled independently of the emission of daylight by the light emitting device. Instead of a darkening element in the form of a slidable segment, it would also be possible to provide a pane, the light transmittance of which can be controlled, such as, for example, a pane of electrochromic glass.
In
For example, the light receiving opening 172 is arranged on the upper side of the fuselage construction, for example in the crown or apex area thereof. Two lateral door openings 174 are furthermore illustrated in
Since structural measures extending in the longitudinal direction such as, for example, supply lines are frequently located on the inner side of the enveloping surface in the centrally positioned apex area, the light guiding device 38 is realized in such a way that a portion of the incident daylight that is indicated with a light structure 175 in
The daylight input system 16 described above with reference to
In
According to another exemplary embodiment that is illustrated in
According to another exemplary embodiment, it is provided to arrange the light receiving device 36 above the window, however, within the window opening in the fuselage construction. In other words, the same opening in the fuselage is used and only the actual window opening, i.e., the look-through opening, is slightly reduced in order to accommodate the light receiving device 36. To this end,
According to other exemplary embodiments of the method, a combination of the characteristics that were described above in connection with the system is proposed as a supplement and expansion of the basic steps of the method according to
The above-described exemplary embodiments can be combined in different ways. Aspects of the method may, in particular, also be realized in embodiments of the system, as well as in the embodiments of the utilization of the system, and vice versa.
As a supplement, it should be noted that “comprising” does not exclude any other elements or steps and that “a” or “an” does not exclude a plurality. It should furthermore be noted that characteristics or steps that were described with reference to one of the above exemplary embodiments and aspects can also be used in combination with other characteristics or steps of other above-described exemplary embodiments and aspects. This may result in other synergy effects that are not described. Reference symbols in the claims should not be interpreted in a restrictive sense.
Number | Date | Country | Kind |
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10 2012 007 473.5 | Apr 2012 | DE | national |
The present application is a continuation of International Application No. PCT/EP2013/057730, filed Apr. 12, 2013, which claims priority from German Patent Application No. 10 2012 007 473.5, filed Apr. 13, 2012, and which claims the benefit of the filing date of U.S. Provisional Patent Application No. 61/623,657, filed Apr. 13, 2012, the disclosure of which applications is hereby incorporated herein by reference.
Number | Date | Country | |
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61623657 | Apr 2012 | US |
Number | Date | Country | |
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Parent | PCT/EP2013/057730 | Apr 2013 | US |
Child | 14511876 | US |