CN105680929A - Blackout broken reentry aircraft communication system and method - Google Patents
Blackout broken reentry aircraft communication system and method Download PDFInfo
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- CN105680929A CN105680929A CN201610056782.XA CN201610056782A CN105680929A CN 105680929 A CN105680929 A CN 105680929A CN 201610056782 A CN201610056782 A CN 201610056782A CN 105680929 A CN105680929 A CN 105680929A
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- laser
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- aircraft
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- reentry vehicle
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
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- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Details Of Aerials (AREA)
- Optical Communication System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a blackout broken reentry aircraft communication system and method. The system is composed of a signal transmitting part on an aircraft and a signal transfer part on a transfer aircraft. The signal transmitting part comprises a four-quadrant detector, a laser communication transmitter and a first rotation mechanism; the four-quadrant detector and the laser communication transmitter are mounted on the first rotation mechanism; the signal transfer part is composed of a laser detector, a laser communication receiving antenna, a transfer radio frequency transmitter and a second rotation mechanism; the laser detector is mounted on the second rotation mechanism. When the aircraft lands, the laser detector locks the reentry aircraft and continuously transmit indication laser beams; the first rotation mechanism rotates, therefore the communication laser beams fall on the laser receiving antenna; and the communication laser beams are converted into radio frequency signals and then are sent to a ground surface. The system and the method provided by the invention has the advantages that (1) the reentry aircraft can send out information in a laser format; therefore, the information still can be sent out in a blackout area; and (2), when the reentry aircraft returns, the signal transfer aircraft flies to a sufficient height, the laser beams can be prevented from being blocked by clouds.
Description
Technical field
The present invention relates to a kind of reentry vehicle and break through " black barrier " communication system and method.
Background technology
During high-speed aircraft people's atmosphere again, air is sharply compressed, and aircraft front end can form one intense shock wave. Owing to aircraft wall produces strong friction with air molecule, the temperature of aircraft surrounding air, pressure sharply raise, and make the electronics of air Middle molecule and atom be excited to high level, ionize, ion and free electron occur, forms plasma sheath in the periphery of aircraft. Electromagnetic wave is in plasma sheath in communication process, and because being reflected by plasma sheath, absorbing, electromagnetic intensity produces decay, and the effects such as deviation, time delay, phase shift occurs; Gas ions sheath will cause antenna impedance severe mismatch simultaneously, and antenna pattern distorts, and radiation efficiency declines, and even radiofrequency signal is interrupted completely, here it is usually said black barrier phenomenon. The appearance of black barrier brings great difficulty to the telemetry communication of high-speed aircraft, guidance. Owing to carrying out multiple communication between reentry vehicle palpus and ground and satellite in orbit, such as GPS navigation location, remote sensing remote measurement, voice communication etc., and the real-time Transmission of coherent signal is interfered or interrupts in communication blackout range, have a strong impact on controlling in real time and landing safety of aircraft. Along with the speed of aircraft improves constantly, the black barrier problem of communication of its atmospheric reentry becomes more to highlight. Such as in the process entering Mars atmosphere, aircraft flight environmental analysis, track and localization will be brought impact by the black barrier that communicates, and even have influence on the success of detection mission.
In view of aircraft is affected by black barrier, it has been proposed that various way slows down or eliminates black barrier, such as change aerodynamic configuration, add magnetic window, water spray, raising carrier frequency and transmitting power etc. Namely change of flight device external form stretches out fin or tip on board the aircraft, outside antenna is stretched out plasma sheath. Plasma sheath around antenna can be very thin, and electron density is relatively low, and electromagnetic decay reduces, and signal is possible to through plasma sheath.The cardinal principle adding methods of magnetic field is the motion and the distribution that utilize externally-applied magnetic field to change electronics, the plasma density allowing antenna area reduces or produces new communication mode, thus reducing electromagnetic decay or the electromagnetic wave of characteristic frequency can be propagated in sheath. Another kind of method is injection electrophilic material in sheath, such as water, sulfur hexafluoride, carbon tetrachloride or ceramic powders etc., the membership that adds of these materials reduces the temperature of sheath near antenna, or the free electron of absorption there, cause the minimizing of local electron density reduction or free electron, thus reducing signal attenuation.
Some method above-mentioned test proves that it is effective, but effect is limited, because the common ground of these methods is all reduce electromagnetic decay in blackout range, and the degree reduced often does not reach the requirement of telemetry communication, the stone of 100 jin can be lifted like a people, the stone that another person is 200 jin, and now with the boulder of a piece 500 jin, although later people's strength is larger but same act is not got up. Solve the communication issue in blackout range, its communication means being at all in that to adopt the impact of a kind of not subject plasma.
Summary of the invention
" black barrier " communication system broken through by the reentry vehicle that the present invention relates to, is grouped into by being arranged on reentry vehicle signal emission part and being arranged on the carry-on signal transhipment department of signal transfer. Signal emission part is made up of 4 quadrant detector, laser communication emitter, the first signal processing computer, the first rotating mechanism and transparent heat-insulated cover. Transparent heat-insulated cover is arranged on the head of reentry vehicle, and internal 4 quadrant detector and laser communication emitter are arranged on the first rotating mechanism side by side. Signal transfer is partially installed on signal transfer aircraft, and by laser detector, laser communication reception antenna, the second rotating mechanism, secondary signal processes computer and transfer radiofrequency launcher forms. The optical axis of laser detector is vertical with laser communication reception antenna plane, is arranged on the second rotating mechanism, and the second rotating mechanism is arranged on the top of signal transfer aircraft. During aircraft lands, laser detector locking reentry vehicle, persistently launch instruction laser beam. 4 quadrant detector receives instruction laser beam and send the first signal processing computer, and the first signal processing computer controls the first rotating mechanism accordingly and rotates, and makes the laser beam that laser communication emitter is launched drop on laser communication reception antenna. After laser communication reception antenna receives laser beam, secondary signal processing computer and change into radiofrequency signal, transfer radiofrequency launcher ground station sends.
The beneficial effects of the present invention is:
(1) reentry vehicle can be sent out information by the form of laser, and laser can pass plasma, therefore still can be sent out information in blackout range;
(2) when reentry vehicle returns, as long as signal transfer aircraft flies to enough height, it is possible to avoid laser beam to be stopped by cloud layer.
Accompanying drawing explanation
Fig. 1 is that " black barrier " communication system schematic diagram broken through by reentry vehicle.
Label declaration: 1 laser communication emitter, 24 quadrant detectors, 3 signal transfer aircraft, 4 laser detectors, 5 laser communication reception antennas.
Detailed description of the invention
Reentry vehicle is broken through " black barrier " communication system and is made up of signal transmitting and signal transfer two parts.
Signal emission part is arranged on reentry vehicle, is made up of 4 quadrant detector (2), laser communication emitter (1), the first signal processing computer, the first rotating mechanism and transparent heat-insulated cover.Transparent heat-insulated cover, as a part for aircraft skin, is arranged on the head of reentry vehicle, and internal 4 quadrant detector (2) and laser communication emitter (1) are arranged on the first rotating mechanism side by side, and the optical axis of two devices is parallel. First rotating mechanism is controlled by the first signal processing computer, it is possible to two degree of freedom rotate.
Signal transfer is partially installed on signal transfer aircraft (3), laser detector (4), laser communication reception antenna (5), the second rotating mechanism, transfer radiofrequency launcher and secondary signal process computer and form. The optical axis of laser detector (4) is vertical with laser communication reception antenna (5) plane, is arranged on the second rotating mechanism, and the second rotating mechanism is arranged on the top of signal transfer aircraft (3). Laser detector (4) can detect, and follows the tracks of reentry vehicle by controlling the second rotating mechanism, can also launch laser beam to reentry vehicle simultaneously.
Signal transfer aircraft (3) needs to fly to enough height, to avoid laser beam to be stopped by cloud layer.
Represent the ultimate range of signal transfer aircraft (3) and the reentry vehicle being in blackout range with d, represent the radius of laser communication reception antenna (5) with r, thenCan as the light axial adjustment threshold value of laser communication emitter (1), when laser communication emitter (1) optical axis direction with instruction beam direction angle less thanTime, the laser beam that laser communication emitter (1) is launched just can drop on laser communication reception antenna (5). The height being likely to occur due to black barrier is at below 100km, the ultimate range of putative signal transfer aircraft (3) and the reentry vehicle being in blackout range is 100km, the radius of laser communication reception antenna (5) is 1m, then the light axial adjustment threshold value of laser communication emitter (1) is 10-5Rad.
When reentry vehicle starts to land, under the cooperation of ground control station, it is arranged on the laser detector (4) on signal transfer aircraft (3) to implement reentry vehicle to catch, follow the tracks of, is aiming at and after lock onto target, persistently launching instruction laser beam. After 4 quadrant detector (2) on reentry vehicle receives instruction laser beam, the angle information number of delivering letters first of instruction laser beam is processed computer, first signal processing computer obtains the angle of instruction laser beam by calculating, and control the first rotating mechanism rotation with this, make the optical axis direction of laser communication emitter (1) and the angle of the instruction beam direction light axial adjustment threshold value less than laser communication emitter (1), so that the laser beam that laser communication emitter (1) is launched drops on laser communication reception antenna (5). Afterwards, laser communication signal launched by laser communication emitter (1), signal is received after arriving laser communication reception antenna (5), secondary signal process computer and change into radiofrequency signal, sent by transfer radiofrequency launcher ground station.
Claims (3)
1. " black barrier " communication system broken through by reentry vehicle, including the signal transfer part being arranged on reentry vehicle signal emission part and be arranged on signal transfer aircraft (3); Signal emission part is made up of 4 quadrant detector (2), laser communication emitter (1), the first signal processing computer, the first rotating mechanism and transparent heat-insulated cover; Signal transfer is partially installed on signal transfer aircraft, and by laser detector (4), laser communication reception antenna (5), the second rotating mechanism, secondary signal processes computer and transfer radiofrequency launcher forms; It is characterized in that: first, second rotating mechanism is controlled by first, second signal processing computer respectively, it is possible to two degree of freedom rotate;Transparent heat-insulated cover, as a part for aircraft skin, is arranged on the head of reentry vehicle, and internal 4 quadrant detector (2) and laser communication emitter (1) are arranged on the first rotating mechanism side by side, and the optical axis of two devices is parallel; The optical axis of laser detector (4) is vertical with laser communication reception antenna (5) plane, is arranged on the second rotating mechanism, and the second rotating mechanism is arranged on the top of signal transfer aircraft (3); Laser detector (4) can detect, and follows the tracks of reentry vehicle by controlling the second rotating mechanism, can also launch laser beam to reentry vehicle simultaneously.
2. " black barrier " communication means broken through by reentry vehicle, it is characterized in that: represent the ultimate range of signal transfer aircraft (3) and the reentry vehicle being in blackout range with d, the radius of laser communication reception antenna (5) is represented with r, then r/d is the light axial adjustment threshold value of laser communication emitter (1), when the optical axis direction of laser communication emitter (1) and the angle of instruction beam direction are less than light axial adjustment threshold value, laser communication emitter (1) starts to launch laser signal to laser communication reception antenna (5).
3. " black barrier " communication means broken through by reentry vehicle, it is characterized in that: when reentry vehicle lands, under the cooperation of ground control station, it is arranged on the laser detector (4) on signal transfer aircraft (3) to implement reentry vehicle to catch, follow the tracks of, after aiming at and locking reentry vehicle, persistently launch instruction laser beam; After 4 quadrant detector (2) on reentry vehicle receives instruction laser beam, the first signal processing computer is sent by the angle information of instruction laser beam, first signal processing computer obtains the angle of instruction laser beam by calculating, and control the first rotating mechanism rotation with this, the optical axis direction making laser communication emitter (1) and the angle indicating beam direction are less than the light axial adjustment threshold value described in claim 2, so that the laser beam that laser communication emitter (1) is launched drops on laser communication reception antenna (5); Afterwards, laser communication signal launched by laser communication emitter (1), signal is received after arriving laser communication reception antenna (5), secondary signal process computer and change into radiofrequency signal, sent by transfer radiofrequency launcher ground station.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610056782.XA CN105680929B (en) | 2016-01-23 | 2016-01-23 | Reentry vehicle breaks through black barrier communication system |
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| CN201610056782.XA CN105680929B (en) | 2016-01-23 | 2016-01-23 | Reentry vehicle breaks through black barrier communication system |
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| CN105680929A true CN105680929A (en) | 2016-06-15 |
| CN105680929B CN105680929B (en) | 2018-09-28 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911397A (en) * | 2017-01-23 | 2017-06-30 | 南京航空航天大学 | It is a kind of reentered suitable for aircraft during blackout range X-ray communication method |
| CN108630065A (en) * | 2018-05-15 | 2018-10-09 | 哈尔滨工业大学 | Pulsed magnetic field regulates and controls the experimental provision of spacecraft blackout range dissipation plasma by force |
| CN109150315A (en) * | 2018-10-30 | 2019-01-04 | 宁波光舟通信技术有限公司 | Transmission method, the apparatus and system of Communication ray |
| CN109257095A (en) * | 2018-10-30 | 2019-01-22 | 宁波光舟通信技术有限公司 | The transmission method and device of Communication ray |
| CN109391330A (en) * | 2018-11-30 | 2019-02-26 | 宁波光舟通信技术有限公司 | Signal transmit-receive method, the apparatus and system of airborne receive-transmit system |
| CN109560874A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal transmitting method, the apparatus and system of launched by airplane system |
| CN109560869A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal acceptance method, the apparatus and system of airborne reception system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911397A (en) * | 2017-01-23 | 2017-06-30 | 南京航空航天大学 | It is a kind of reentered suitable for aircraft during blackout range X-ray communication method |
| CN108630065A (en) * | 2018-05-15 | 2018-10-09 | 哈尔滨工业大学 | Pulsed magnetic field regulates and controls the experimental provision of spacecraft blackout range dissipation plasma by force |
| CN108630065B (en) * | 2018-05-15 | 2020-05-08 | 哈尔滨工业大学 | Experimental device for regulating and controlling strong dissipation plasma in spacecraft black barrier area through pulse magnetic field |
| CN109150315A (en) * | 2018-10-30 | 2019-01-04 | 宁波光舟通信技术有限公司 | Transmission method, the apparatus and system of Communication ray |
| CN109257095A (en) * | 2018-10-30 | 2019-01-22 | 宁波光舟通信技术有限公司 | The transmission method and device of Communication ray |
| CN109391330A (en) * | 2018-11-30 | 2019-02-26 | 宁波光舟通信技术有限公司 | Signal transmit-receive method, the apparatus and system of airborne receive-transmit system |
| CN109560874A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal transmitting method, the apparatus and system of launched by airplane system |
| CN109560869A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal acceptance method, the apparatus and system of airborne reception system |
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| CN105680929B (en) | 2018-09-28 |
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Effective date of registration: 20191016 Address after: 314500 No. 68 Chongwen Road, Tongxiang Economic Development Zone, Jiaxing City, Zhejiang Province Patentee after: Jiaxing Aung Teng Environmental Protection Technology Co., Ltd. Address before: 264670 Yantai high tech Development Zone, Shandong Province, No. 513 Patentee before: An Kai |
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