CN102542750A - Data transmission system of LEO (Low Earth Orbit) optical imaging satellite - Google Patents
Data transmission system of LEO (Low Earth Orbit) optical imaging satellite Download PDFInfo
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Abstract
The invention relates to satellite data transmission, and discloses a data transmission system of an LEO (Low Earth Orbit) optical imaging satellite. The data transmission system of the LEO optical imaging satellite comprises a data transmission integrated processor, a data transmission transmitter subsystem and a data transmission antenna driving subsystem, wherein the data transmission integrated processor receives satellite load image data and auxiliary data, finishes the functions of image data compressing, data storing, formatting, RS (Remote Sensing) coding and scrambling/encrypting, and outputs continuous data transmission frame format data; the data transmission transmitter subsystem receives the continuous data transmission frame format data output by the data transmission integrated processor, and carries out the processes, such as series-parallel difference, convolutional coding, DQPSK (Differential Quadrature Reference Phase Shift Keying) modulating and power amplifying; and the data transmission antenna driving subsystem carries out shaped to earth transmission. According to the data transmission system of the LEO optical imaging satellite, disclosed by the invention, the defect that the traditional satellite data transmission system cannot be used on an LEO great-attitude side swing wide-width optical imaging satellite is overcome, the weight and the energy consumption are reduced, and the stability of the data transmission system is increased.
Description
Technical field
The present invention relates to the satellite data transmission, particularly a kind of data transmission system of low rail optical imagery satellite.
Background technology
Satellite data transmission system is one of most important subsystem of satellite; Its major function is Base-Band Processing such as the data (or other needs data of transmission over the ground) that the useful load detection instrument is obtained format, store, encryption, Error Correction of Coding; Through suitable manner modulation, power amplification, pass antenna through number and transmit over the ground.Nowadays the satellite useful load all obtains develop rapidly in theoretical, technological still application facet; Particularly along with novel sensor continues to bring out; Wide cut visual light imaging, microwave remote sensing, high spectrum resolution remote sensing technique reach its maturity; Along with the generally raising of payload space resolution, temporal resolution and spectral resolution, produced high raw data bit rate, data transmission system is had higher requirement.
The low big attitude side-sway of rail wide cut optical imagery satellite has characteristics such as the imaging scope is wide, rolling/pitch orientation attitude maneuver angle is big, can in one day, heavily visit the arbitrary target in the global range, thereby obtain application more and more widely.As far as the low big attitude side-sway of rail wide cut optical imagery satellite, the ability of immediate data transmission between its useful load wide cut visible light camera output data rate ultra existing star ground far away; On the other hand, owing to require satellite in big attitude side-sway imaging, also can transmit data over the ground, traditional number passes the Antenna Design scheme can not satisfy this request for utilization.
Existing satellite data transmission system base band signal process function is generally accomplished by many units; Pass like data transmission terminal machine (accomplishing functions such as format analysis processing, multiplexed, RS coding), number and to deposit (completion data access function) admittedly, number passes encryption equipment (accomplishing data scrambling/encryption function) and number passes compressor (completion load data compression function); So many units all are being no small expenses aspect whole star weight, the power consumption, have therefore proposed the requirement of the system integration.
The data transmission system that how to design a high integration satisfies the request for utilization of the low big attitude side-sway of rail wide cut optical imagery satellite, and the explanation or the report of the similar techniques that present discovery is published are not collected both at home and abroad similarly data as yet yet.
Summary of the invention
Can not adapt to the problem of the low big attitude side-sway of rail wide cut optical imagery satellite in order to solve the available data transmission system, the object of the present invention is to provide a kind of data transmission system of low rail optical imagery satellite the requirement of data transmission system.The present invention is applicable to the high integration data transmission of the low big attitude side-sway of rail wide cut optical imagery satellite; With solving the transmission problem of wide cut optical camera high speed image data and the data transmission problems under the satellite side-sway condition; Improve level of integrated system, reduce whole star weight and energy resource consumption.
In order to reach the foregoing invention purpose, the technical scheme that the present invention is adopted for its technical matters of solution provides a kind of data transmission system of low rail optical imagery satellite, and this device comprises:
Number passes the overall treatment devices: by compression module, deposit control module and control treatment module, scrambling encrypting module admittedly, power module is formed; Be used to receive satellite load view data and auxiliary data; And accomplish Image Data Compression, data access, format, RS coding, scrambling/encryption function; Export continuous number and pass the frame format data, be sent to several transmission transmitter subsystems through the LVDS transmission cable;
Number transmission transmitter subsystem: is made up of with power amplifier level travelling-wave tube prime QPSK modulation, the continuous number that is used to receive the output of overall treatment device passes the frame format data, and above-mentioned data are gone here and there and difference, convolutional encoding, DQPSK are modulated, the power amplification processing;
Number passes the antenna driver sub-system: comprise that number passes antenna, one dimension driving mechanism and driving mechanisms control device, number passes the radiofrequency signal that antenna receives the output of number transmission transmitter subsystem, and carries out figuration transmission over the ground; The driving mechanisms control device that number passes antenna receives the instruction that ground is injected, and controls one dimension drive mechanism number and passes antenna to assigned address, after transmission is accomplished, drives number biography antenna and returns zero-bit.
The data transmission system of the low rail optical imagery satellite of the present invention is taked above-mentioned high integration data transmission system scheme, and through ground each item experimental test and satellites transmits test, in orbit examination, proof scheme is effective, reliable and stable.The invention solves the deficiency that existing satellite data transmission system can not be used on the low big attitude side-sway of rail wide cut optical imagery satellite; Adopted the module integrated technology simultaneously; Reduce data transmission system shared weight and expense of power consumption in whole satellite, improved the stability of several biography system.The technical scheme of the disclosed satellite data transmission system of the present invention has certain reference to the data transmission system design of various model satellites and other spacecrafts.
Description of drawings
Fig. 1 is the data transmission system block diagram of a kind of low rail optical imagery satellite of the present invention;
Fig. 2 is the information flow chart of the data transmission system of the low rail optical imagery satellite of the present invention.
Embodiment
Below in conjunction with description of drawings the preferred embodiments of the present invention.
Can not adapt to the transmission of wide cut optical camera high speed image data and the data transmission requirement under the satellite side-sway condition for solving the available data transmission system; The present invention provides a kind of data transmission system of low rail optical imagery satellite, and this system is the very strong high integrated data technical scheme of transmission of adaptability.
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
Fig. 1 is the data transmission system block diagram of a kind of low rail optical imagery satellite of the present invention, is labeled as among the figure: 1. pass overall treatment device compression module for number; 2. for passing the overall treatment device, number deposits control module admittedly; 3. pass overall treatment device A for number; 4. be the LVDS transmission cable; 5. count transmission transmitter subsystem A; 6. pass antenna A for number; 7. pass the antenna driver sub-system for number.The picture in picture example is:
At present that the functional description of this each module of system is following:
The view data of each camera output and auxiliary data are imported number respectively and are passed the overall treatment device on the satellite, and existing is that example is described with A road view data among Fig. 1, and this system comprises:
Number passes overall treatment devices 3: by compression module 1, deposit control module 2 and control and treatment, scrambling encryption admittedly, power module is formed; Be used to receive satellite load view data and auxiliary data; And accomplish Image Data Compression, data access, format, RS coding, scrambling/encryption function; Export continuous number and pass the frame format data, be sent to several transmission transmitter subsystems 5 through LVDS transmission cable 4;
Number transmission transmitter subsystem 5: form by prime (QPSK modulation) and power amplifier level travelling-wave tube; The continuous number that is used to receive the output of overall treatment device passes the frame format data, and above-mentioned data are gone here and there and difference, convolutional encoding, DQPSK modulation, power amplification are handled;
Number passes antenna driver sub-system 7: comprise that number passes antenna, one dimension driving mechanism and driving mechanisms control device, number passes the radiofrequency signal that antenna 6 receives 5 outputs of number transmission transmitter subsystem, and carries out figuration transmission over the ground; The driving mechanisms control device that number passes antenna receives the instruction that ground is injected, and controls one dimension drive mechanism number and passes antenna 6 to assigned address, after transmission is accomplished, drives number biography antenna and returns zero-bit.
Above-mentioned number passes many ratios, the high fidelity visual data compression technique that overall treatment device compression module 1 adopts based on the JPEG2000 Joint Photographic Experts Group, adopts the ADV202 special chip to realize the compression of view data.
Above-mentioned number passes the overall treatment device and deposits control module 2 employing data sequential write admittedly, carries out by the file operation mode with machine-readable scheme realization data access, and storage medium adopts the SDRAM array.
Above-mentioned number passes overall treatment device 3 and adopts the integrated composition unit of multifunction modules, and this unit is by compressive plate, deposit that control panel, control and treatment plate, scrambling are encrypted plate, power panel is formed, and has realized multiple integration of function admittedly.
Above-mentioned number passes between overall treatment device compression module 1 and the wide cut camera, counts to pass between overall treatment device and the number transmission transmitter and adopt high speed LVDS transmission cable 4 to carry out data transmission, and adopts UT54LVDS031LV and UT54LVDS032LV special chip and twisted pair transmission line realization high-speed data reliable transmission.
Above-mentioned number passes antenna driver sub-system 7 and has adopted the one dimension driving mechanism of shaped aerial over the ground, adopts the step motor drive antenna to rotate, and adopts Hall element positioning antenna position.
Describe in the face of course of action of the present invention down.
Fig. 2 is the information flow chart of the data transmission system of the low rail optical imagery satellite of the present invention, further information flow of the present invention is carried out generality below in conjunction with Fig. 2 and describes, and the total flow process of system of the present invention can be divided into following four parts:
1: each passage camera data inputs to number through the LVDS interface and passes overall treatment device compression module; Compression module carries out after the pre-service view data and image auxiliary data separated to each passage camera data and gets into FIFO, view data and image auxiliary data accomplish respectively compression and multiplexing after be reassembled into compressed package output;
2: compression of images bag data, public auxiliary data and the padding data of the output of the compression module of number stream scheduler module scheduling in real time form continuous data and get into the CCSDS formatting module; Image stored compressed package data, public auxiliary data and padding data formed continuous data and get into the CCSDS formatting module during the scheduling of storage number stream scheduler module was deposited admittedly;
Data after the 3:CCSDS format are through RS coding, the output of scrambling/encryptions back, get into go here and there behind the transmitter and difference, convolutional encoding, QPSK IF Modulation, up-conversion after input to and count the biography antenna and transmit over the ground;
4: number passes antenna driving mechanisms control device and receives number pipe computer instruction controlling and driving mechanism driving number biography antenna to required angle, simultaneously telemetry is returned number pipe computing machine.
The present invention passes through ground each item experimental test and satellites transmits is tested, examination in orbit; The data transmission system of the low rail optical imagery satellite of proof the present invention is reliable and stable effectively, and the data transmission system design of various model satellites and other spacecrafts is had certain reference.
Claims (6)
1. the data transmission system of one kind low rail optical imagery satellite is characterized in that, this device comprises:
Number passes the overall treatment devices: by compression module, deposit control module and control treatment module, scrambling encrypting module admittedly, power module is formed; Be used to receive satellite load view data and auxiliary data; And accomplish Image Data Compression, data access, format, RS coding, scrambling/encryption function; Export continuous number and pass the frame format data, be sent to several transmission transmitter subsystems through the LVDS transmission cable;
Number transmission transmitter subsystem: is made up of with power amplifier level travelling-wave tube prime QPSK modulation, the continuous number that is used to receive the output of overall treatment device passes the frame format data, and above-mentioned data are gone here and there and difference, convolutional encoding, DQPSK are modulated, the power amplification processing;
Number passes the antenna driver sub-system: comprise that number passes antenna, one dimension driving mechanism and driving mechanisms control device, number passes the radiofrequency signal that antenna receives the output of number transmission transmitter subsystem, and carries out figuration transmission over the ground; The driving mechanisms control device that number passes antenna receives the instruction that ground is injected, and controls one dimension drive mechanism number and passes antenna to assigned address, after transmission is accomplished, drives number biography antenna and returns zero-bit.
2. the data transmission system of satellite as claimed in claim 1 is characterized in that: described number passes overall treatment device compression modules and adopts based on JPEG2000 Joint Photographic Experts Group compressing image data.
3. the data transmission system of satellite as claimed in claim 1; It is characterized in that: described number passes the overall treatment device and deposits control module employing data sequential write admittedly, carries out by the file operation mode with machine-readable scheme realization data access, and storage medium adopts the SDRAM array.
4. the data transmission system of satellite as claimed in claim 1 is characterized in that: described number passes the overall treatment device and adopts multifunction module to form unit, and this unit comprises compressive plate, deposit control panel, control and treatment plate, scrambling admittedly encrypts plate and power panel.
5. the data transmission system of satellite as claimed in claim 1 is characterized in that: described number passes between overall treatment device compression module and the wide cut camera, number passes the overall treatment device and count that employing high speed LVDS transmission cable interface carries out data transmission between the transmission transmitter.
6. the data transmission system of satellite as claimed in claim 1 is characterized in that: described number passes the antenna driver sub-system and adopts the one dimension driving mechanism of shaped aerial over the ground, adopts the step motor drive antenna to rotate, and adopts Hall element positioning antenna position.
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Cited By (13)
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| CN102829869A (en) * | 2012-08-16 | 2012-12-19 | 中国科学院西安光学精密机械研究所 | Ground test system for large-aperture static interference imaging spectrometer |
| CN103471628A (en) * | 2013-08-23 | 2013-12-25 | 北京空间机电研究所 | Compression-optics-based space optical laboratory system |
| CN104283639A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Troubleshooting system and method of data transmission sub system based on two stages of check codes |
| CN104283604A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Data transmission system and method for over-the-ground optical remote sensing satellite |
| CN105611294A (en) * | 2015-11-18 | 2016-05-25 | 上海卫星工程研究所 | Spaceborne remote-sensing image compression channel multiplexing system and method |
| CN106231224A (en) * | 2016-07-29 | 2016-12-14 | 中国科学院长春光学精密机械与物理研究所 | A kind of integrated image processing system for video moonlet load |
| CN106708072A (en) * | 2016-11-30 | 2017-05-24 | 上海卫星工程研究所 | Method for determining and controlling high-precision gesture of space-based telescope |
| CN111698516A (en) * | 2020-06-19 | 2020-09-22 | 上海航天计算机技术研究所 | Flight image decoding method and system based on CCSDS framework |
| CN113364514A (en) * | 2021-05-31 | 2021-09-07 | 上海航天计算机技术研究所 | High-speed baseband data processing device applied to satellite platform |
| CN113541774A (en) * | 2021-09-17 | 2021-10-22 | 椭圆时空(北京)科技有限公司 | Remote-control integrated satellite system |
| CN113872667A (en) * | 2021-09-24 | 2021-12-31 | 中国人民警察大学 | Unmanned aerial vehicle video image real-time transmission system |
| CN115101935A (en) * | 2022-07-25 | 2022-09-23 | 上海宇航系统工程研究所 | A spaceborne integrated antenna mechanism driver |
| CN116011781A (en) * | 2023-01-16 | 2023-04-25 | 长光卫星技术股份有限公司 | A Method for Remote Sensing Satellite Compression Task Time Allocation |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829869A (en) * | 2012-08-16 | 2012-12-19 | 中国科学院西安光学精密机械研究所 | Ground test system for large-aperture static interference imaging spectrometer |
| CN103471628A (en) * | 2013-08-23 | 2013-12-25 | 北京空间机电研究所 | Compression-optics-based space optical laboratory system |
| CN103471628B (en) * | 2013-08-23 | 2015-09-23 | 北京空间机电研究所 | A kind of space optics laboratory system based on compression optics |
| CN104283604B (en) * | 2014-09-16 | 2018-01-02 | 上海卫星工程研究所 | The data transmission system and its data transmission method of Optical remote satellite over the ground |
| CN104283639A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Troubleshooting system and method of data transmission sub system based on two stages of check codes |
| CN104283604A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Data transmission system and method for over-the-ground optical remote sensing satellite |
| CN104283639B (en) * | 2014-09-16 | 2018-02-09 | 上海卫星工程研究所 | The troubleshooting system and its troubleshooting method of data transmission subsystem based on two-stage check code |
| CN105611294B (en) * | 2015-11-18 | 2019-05-03 | 上海卫星工程研究所 | Space remote sensing compression of images channel multiplexing system and method |
| CN105611294A (en) * | 2015-11-18 | 2016-05-25 | 上海卫星工程研究所 | Spaceborne remote-sensing image compression channel multiplexing system and method |
| CN106231224A (en) * | 2016-07-29 | 2016-12-14 | 中国科学院长春光学精密机械与物理研究所 | A kind of integrated image processing system for video moonlet load |
| CN106708072A (en) * | 2016-11-30 | 2017-05-24 | 上海卫星工程研究所 | Method for determining and controlling high-precision gesture of space-based telescope |
| CN111698516A (en) * | 2020-06-19 | 2020-09-22 | 上海航天计算机技术研究所 | Flight image decoding method and system based on CCSDS framework |
| CN113364514A (en) * | 2021-05-31 | 2021-09-07 | 上海航天计算机技术研究所 | High-speed baseband data processing device applied to satellite platform |
| CN113364514B (en) * | 2021-05-31 | 2022-08-26 | 上海航天计算机技术研究所 | High-speed baseband data processing device applied to satellite platform |
| CN113541774B (en) * | 2021-09-17 | 2021-12-24 | 椭圆时空(北京)科技有限公司 | Remote-control integrated satellite system |
| CN113541774A (en) * | 2021-09-17 | 2021-10-22 | 椭圆时空(北京)科技有限公司 | Remote-control integrated satellite system |
| CN113872667A (en) * | 2021-09-24 | 2021-12-31 | 中国人民警察大学 | Unmanned aerial vehicle video image real-time transmission system |
| CN115101935A (en) * | 2022-07-25 | 2022-09-23 | 上海宇航系统工程研究所 | A spaceborne integrated antenna mechanism driver |
| CN115101935B (en) * | 2022-07-25 | 2025-05-16 | 上海宇航系统工程研究所 | A satellite-borne integrated antenna mechanism driver |
| CN116011781A (en) * | 2023-01-16 | 2023-04-25 | 长光卫星技术股份有限公司 | A Method for Remote Sensing Satellite Compression Task Time Allocation |
| CN116011781B (en) * | 2023-01-16 | 2025-05-30 | 长光卫星技术股份有限公司 | A method for allocating time of compressed missions of remote sensing satellites |
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Inventor after: Hou Jianwen Inventor after: Zhou Weimin Inventor after: Wei Zhikun Inventor after: Ye Hui Inventor after: Gu Guihua Inventor after: Niu Junpo Inventor before: Wei Zhikun Inventor before: Ye Hui Inventor before: Gu Guihua Inventor before: Niu Junpo |
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Application publication date: 20120704 |