IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0994014
(2005-06-30)
|
등록번호 |
US-8267348
(2012-09-18)
|
국제출원번호 |
PCT/EP2005/007074
(2005-06-30)
|
§371/§102 date |
20080703
(20080703)
|
국제공개번호 |
WO2007/003206
(2007-01-11)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
8 |
초록
▼
Unmanned aircraft used as a platform for telecommunication or other scientific purposes at a predetermined altitude in the stratosphere. The unmanned aircraft includes a pressurized balloon filled with gas and that supports the platform. The pressurized balloon is arranged within an outer balloon pr
Unmanned aircraft used as a platform for telecommunication or other scientific purposes at a predetermined altitude in the stratosphere. The unmanned aircraft includes a pressurized balloon filled with gas and that supports the platform. The pressurized balloon is arranged within an outer balloon provided with an aerodynamic external shape in the stratosphere and forms a low-pressure or high-pressure insulating chamber around the pressurized balloon. A heating and cooling system circulates medium in the insulating chamber and electrically driven propellers are located outside the outer balloon to maintain the position of the platform relative to the Earth. The negative effects that extreme differences in temperature have on the gas pressure in the pressurized balloon are thus largely cancelled such that the pressurized balloon can be made of a lighter and cheaper material and the service life thereof is effectively extended.
대표청구항
▼
1. Unmanned aircraft stationable at a pre-determined altitude in the stratosphere, comprising: a platform for telecommunications equipment or scientific equipment,an outer balloon having an aerodynamic external shape at least when present in the stratosphere, a pressurized balloon which is fillable
1. Unmanned aircraft stationable at a pre-determined altitude in the stratosphere, comprising: a platform for telecommunications equipment or scientific equipment,an outer balloon having an aerodynamic external shape at least when present in the stratosphere, a pressurized balloon which is fillable with gas and that supports the platform, the pressurized balloon being arranged within the outer balloon such that the outer balloon forms at least one insulating chamber around the pressurized balloon, the insulating chamber being fillable with a medium that circulates therethrough,heating and cooling means for heating and cooling the medium circulating in the insulating chamber, andposition maintaining means located outside the outer balloon for maintaining the position of the platform relative to the Earth,the heating and cooling means comprising a heating unit and a cooling unit configured to heat and cool, respectively, the medium circulating through the insulating chamber, the heating unit and cooling unit being configured to operate alternately and both being arranged outside of the outer balloon. 2. Aircraft according to claim 1, wherein the position maintaining means comprise electrically-driven propellers. 3. Aircraft according to claim 2, wherein the propellers are attached pivotably on the platform underneath the outer balloon, the propellers being provided with individual speeds, thus enabling the aircraft to be rotated in a horizontal plane and thus adopting the desired direction of flight at all times. 4. Aircraft according to claim 3, wherein the platform has an aerodynamic external shape and is equipped with a parachute, together with which, after separation from the pressurized balloon and the outer balloon, the platform can be steered back to Earth as an independent aircraft. 5. Aircraft according to claim 2, further comprising a solar collector film arranged on an outer surface of the outer balloon, the solar collector film being configured to generate electrical energy, the propellers being coupled to the solar collector film and being powered by electrical energy generated by the solar collector film. 6. Aircraft according to claim 1, wherein the medium circulating through the insulation chamber is outside air, the heating unit being configured to heat the outside air during the night and the cooling unit being configured to cool the outside air during the day. 7. Aircraft according to claim 1, wherein the medium circulating through the insulation chamber is helium, the heating unit being configured to heat the helium during the night and the cooling unit being configured to cool the helium during the day. 8. Aircraft according to claim 7, further comprising an additional insulation chamber, between the insulation chamber, and the pressurized balloon, the additional insulation chamber being arranged to contain outside air. 9. Aircraft according to claim 1, further comprising a solar collector film arranged on an outer surface of the outer balloon and an additional plastic layer applied to the solar collector film as a heat shield. 10. Aircraft according to claim 9, wherein the solar collector film is configured to generate electrical energy, the heating unit and the cooling unit being coupled to the solar collector film and being powered by electrical energy generated by the solar collector film. 11. Aircraft according to claim 1, further comprising an infrared collector film arranged in connection with the outer balloon. 12. Aircraft according to claim 11, wherein the infrared collector film is in the form of a dark, approximately 12 μm thick aluminum film, and an additional layer of plastic is applied to the inside of the infrared collector film as a heat shield. 13. Aircraft according to claim 11, wherein the pressurized balloon and the outer balloon are made from a transparent material, and the infrared collector film is applied on the inside of the outer balloon facing towards the Earth. 14. Aircraft according to claim 1, further comprising an additional helium-filled balloon, which is contained in the platform and serves as compensation chamber for altitude regulation of the entire aircraft and also for simpler landing of the platform. 15. Aircraft according to claim 1, wherein the heating unit and the cooling unit are arranged in the platform. 16. Aircraft according to claim 1, further comprising a pump configured to pump the medium from the insulating chamber between the pressurized balloon and the outer balloon and direct the medium to the heating unit and the cooling unit. 17. Aircraft according to claim 16, further comprising a drainage line connecting the insulating chamber between the pressurized balloon and the outer balloon and the pump. 18. Aircraft according to claim 16, wherein the pump is arranged outside of the outer balloon. 19. Aircraft according to claim 1, wherein the cooling unit is configured to receive the medium from the insulating chamber between the pressurized balloon and the outer balloon and cool the received medium, and then the cooled medium being directed back into the insulating chamber between the pressurized balloon and the outer balloon. 20. Aircraft according to claim 1, wherein the cooling unit is a heat exchanger configured to exchange heat between the medium circulating through the insulating chamber between the pressurized balloon and the outer balloon and outside air.
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