COMPACT PORTABLE/FIXED AIRFIELD LIGHT

Abstract

The invention relates to an airfield light comprising a body, a medium intensity lighting arrangement, and a high intensity lighting arrangement. The medium intensity lighting arrangement provides an omnidirectional light source, and the high intensity lighting arrangement provides a unidirectional or bidirectional light source. The invention is energy efficient compared to conventional airfield lights, and has particular application to temporary airfields. LEDs may be used as the light sources.

Claims

1. An airfield light comprising: a body; a first lighting arrangement, having a first intensity; and a second lighting arrangement, having a second intensity that is more than 1% higher than the first intensity.

2. An airfield light according to claim 1, further comprising: a third lighting arrangement of substantially the same intensity as the second lighting arrangement, oriented in a substantially opposite direction.

3. An airfield light according to claim 1, wherein the first lighting arrangement is a medium intensity lighting arrangement, and the first intensity is approximately 125 candela.

4. An airfield light according to claim 1, wherein the first lighting arrangement is an omnidirectional lighting arrangement.

5. An airfield light according to claim 1, wherein the first lighting arrangement comprises one or more LEDs.

6. An airfield light according to claim 1, wherein the second lighting arrangement is a high intensity light, and the second intensity is approximately 10000 candela.

7. An airfield light according to claim 1, wherein the second lighting arrangement is a unidirectional or bidirectional lighting arrangement.

8. An airfield light according to claim 1, wherein the first lighting arrangement comprises one or more LEDs.

9. An airfield light according to claim 1, further comprising a wired receiver to receive wired control signals to adjust a setting of the airfield light.

10. An airfield light according to claim 1, further including a wireless receiver to receive wireless control signals to adjust a setting of the airfield light.

11. An airfield light according to claim 1, wherein the setting comprises selectively turning on one of the first lighting arrangement or the second or third lighting arrangement.

12. An airfield light according to claim 1, wherein the setting comprises a pattern of turning on and off one of the first lighting arrangement or the second or third lighting arrangement.

13. An airfield light according to claim 1, wherein the body comprises a substantially flat base.

14. An airfield light according to claim 2, wherein the body comprises a light housing containing the first lighting arrangement, the second lighting arrangement, and the third lighting arrangement.

15. An airfield light according to claim 14, wherein the light housing comprises opposed open sides, and the second lighting arrangement directs light out of the open side, and the third light arrangement directs light out of an opposing open side.

16. An airfield light according to claim 14, wherein the light housing comprises a cone reflector, and the light housing comprises an opening permitting reflection of the first lighting arrangement from the cone reflector, omnidirectionally.

17. An airfield light according to claim 1, wherein the light housing is movable between an operative state and a transport state.

18. An airfield light according to claim 17, wherein the light housing is pivotable to move between the operative state and the transport state.

19. An airfield light according to claim 1, wherein the body comprises a battery housing to house a battery to power the light.

20. An airfield light according to claim 1, wherein the battery is a backup power source to provide backup power if a primary power source is unavailable.

21. An airfield light according to claim 1, further comprising an AC power input.

22. An airfield lighting system including multiple airfield lights according to claim 1, wherein the lights are airfield lights arranged on an airfield.

23. An airfield lighting system according to claim 22, wherein the airfield lights are supplied by a common power source.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Embodiments of the invention will now be described with reference to the accompanying drawings wherein:

[0024] FIG. 1 is a perspective view of an airfield light according to an embodiment of the present invention, in an operative state.

[0025] FIG. 2 is a perspective view of the light of FIG. 1, in a transport (ie non-operative) state.

[0026] FIG. 3 is a side view of the light of FIG. 1, in a transport (ie non-operative) state.

[0027] FIG. 4 is an end view of the light of FIG. 1, in a transport (ie non-operative) state.

[0028] FIG. 5 is a perspective view of an airfield light according to an embodiment of the present invention, in a transport state.

DETAILED DESCRIPTION

[0029] Referring to the figures, there is shown an airfield light 100 comprising a flat-based body 110, to sit firmly on the ground when the light 100 is installed. The body includes a light housing 120 and battery housing 130.

[0030] The light housing 120 houses two lighting arrangementsa first, medium intensity lighting arrangement 150 and a second, high intensity lighting arrangement 160. The entire light housing 120 is installed on a bolt and wing nut arrangement 170, passing through a pivot mount 175, such that it can be moved between an operative state (as shown in FIG. 1) and a non-operative or transport state (as shown in FIGS. 2 to 4). The wing nut can be tightened or loosened on the bolt to allow the light housing 120 to be respectively secured in a desired position, or moved between positions. In this embodiment, the light housing 120 folds or pivots about the bolt, to move the housing 120 between substantially vertical and substantially horizontal positions.

[0031] The medium intensity lighting arrangement 150 includes a medium intensity LED [typically 125 candela], which is located within the light housing 120 and directed upwardly onto a cone reflector 125. The light housing 120 includes a transparent section (e.g. formed of glass, Perspex or other transparent material) which allows light from the medium intensity lighting arrangement 150 to be directed in all directions, off of cone reflector 125.

[0032] The high intensity lighting arrangement 160 includes a bank of high intensity LEDs [typically up to 10,000 candela], and may include two banks of high intensity LEDs as in the embodiment of FIG. 5. In these embodiment, each bank includes seven LEDs. In the embodiment of FIGS. 1 to 4, the housing 120 is open on one side, allowing the bank of high intensity LEDs to shine out that side. In the embodiment of FIG. 5, the housing 120 is open on opposed sides, allowing the respective banks of high intensity LEDs 160 to shine out these open sides. The high intensity lighting arrangement(s) 160 are therefore a unidirectional or bidirectional arrangement, not an omnidirectional arrangement. In general, high intensity airfield lights are required to align with the direction of approach of a plane, particularly during take-off or landing. By recognizing that the high intensity light only needs to shine in the direction of a runway, the present invention uses a unidirectional or bidirectional high intensity light (rather than an omnidirectional light), resulting in significant power savings. In some embodiments, the opposed banks of high intensity LEDs shown in FIG. 5 may be controlled individually, such that high intensity LEDs are only shined in a single direction.

[0033] In the operative state, as shown in FIG. 1, the light housing 120 is oriented substantially vertically, with the high intensity lighting arrangement directed horizontally in opposite directions from the body 110. These directions can be aligned with the direction of a runway.

[0034] In the transport state, as shown in FIGS. 2 to 4, the light housing is folded down substantially horizontally, so that it aligns with the profile of the battery housing 130. This means that the light 100 is more compact, and can be more easily transported.

[0035] The battery may be used as a primary power source in some embodiments of the present invention. However, in this preferred embodiment, the primary power source is an AC power source, and power cables can be run between aligned lights 100 to properly light a runway. The battery, therefore, acts as a backup power source. This is particularly important for temporary airfields, which frequently do not have a backup power generator.

[0036] The light 100 also includes an antenna 140, for receiving wireless control signals. The antenna 140 can also be folded down for transport or when not in use, as best shown in FIG. 2, to reduce the likelihood of damage.

[0037] However, although the antenna 140 can be used to receive wireless control signals, control signals may be transmitted through communication cables. This avoids or reduces any interference with wireless communications between the plane and a control tower. Accordingly, cables between lights 100, arranged on an airfield, may also include communication wiring to enable wired communication between the lights 100 and a controller.

[0038] Control signals may be used to adjust settings of the light 100. Control settings may vary between different embodiments of the invention, but may include the following functionality: [0039] switching the medium intensity LED 150 on or off; [0040] switching either or both banks of high intensity LEDs 160 on or off; [0041] identifying a pattern or sequence of lighting configurations for the high intensity lights 160 or medium intensity light 150e.g. a flashing sequence.

[0042] Although one embodiment of the present inventive has been described above, the invention is capable of many variations within the scope of the inventive concept. In particular, although the described embodiment makes use of LEDs, other lighting sources may also be used. For example, a halogen light source may be used and still obtain some of the benefits of the present invention.

[0043] In other embodiments, the light 100 may not need to be movable to a transport state, or may be moved in a different manner (for example, the light may be moved between operative and transport states by a sliding or telescoping mechanism).

[0044] Throughout this specification and the claims which follow, unless the context requires otherwise, the word comprise, and variations such as comprises and comprising, will be understood to imply the inclusion of a stated integer or step or group of integers or steps, but not the exclusion of any other integer or step or group of integers or steps.

[0045] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.