CN102538765B - Measurement method for satellite space video - Google Patents
Measurement method for satellite space video Download PDFInfo
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- CN102538765B CN102538765B CN201010584589.6A CN201010584589A CN102538765B CN 102538765 B CN102538765 B CN 102538765B CN 201010584589 A CN201010584589 A CN 201010584589A CN 102538765 B CN102538765 B CN 102538765B
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Abstract
The present invention relates to satellite space measurement, and discloses a measurement method for satellite space video. The method comprises the following steps: adopting a video remote measurement probe on the satellite to carry out video shooting on a space observation object; adopting an automatic exposure adjustment method to carry out framing on the shot image data; transmitting the signal modulated with the image data to the ground after carrying out spectrum spreading through a spectrum spreading responser and radio frequency modulation; after carrying out reduction to obtain the image data frame through a land station, adopting a space video measurement calculation method to calculate the relative movement direction and the movement velocity of the space object. The method of the present invention has characteristics of low data amount, low code rate, low power consumption, simple structure, and convenient achievement, and is suitable for the space measurement of the satellite, wherein the total power consumption of the satellite is limited, or the whole layout of the satellite has special requirements.
Description
Technical field
The present invention relates to the space measurement of satellite, be specifically related to a kind of measuring method of space video of satellite.
Background technology
A kind of grinding satellite in Sun-synchronous orbit, the final vehicle when satellite and the rocket are separated is observed away from having living space and the demand of space observational measurement, but because whole star power consumption is limited, total arrangement's nargin is lower, leave for spatial observation system to realize leeway less.
Therefore, how all under limited condition, design complete function in power consumption, layout, realize easy engineering proposal and become problem demanding prompt solution.Do not find at present explanation or the report of technology similar to the present invention, not yet collect both at home and abroad similarly data yet.
Summary of the invention
In order all to design complete function under limited condition, to realize easy engineering proposal in power consumption, layout, the object of the present invention is to provide a kind of measuring method of space video of satellite.Utilize the present invention, a kind of implementation method of space video measuring method can be provided, to solve the spatial observation problem under power consumption, the limited condition of layout, can realize the observational measurement to space object simultaneously.
In order to reach foregoing invention object, the technical scheme that the present invention adopts for its technical matters of solution is to provide a kind of measuring method of space video of satellite, and the method comprises following step:
The Use of Video-TLM probe that utilization is arranged on satellite carries out video capture to the object of observation in space, adopt automatic exposure method of adjustment, the view data that shooting is obtained is carried out framing, undertaken after spread spectrum and rf modulations by spread spectrum answering machine, have the signal of view data to launch earthward modulation by spread spectrum transponder aerial; Land station receives and restores after image data frame, is measured computing method and calculated direction of relative movement and the movement velocity of space object by space video.
The light path part of above-mentioned Use of Video-TLM probe adopts visible ray, fixed focal length imaging, and resolution is better than 100 × 100, and field angle is ± 20 °; Its circuit control section adopts CPLD as main control chip, and the memory capacity of storer is 20 width images.Above-mentioned output image telemetry frame bit rate is 8192bps.
Above-mentioned automatic exposure method of adjustment is taked gray-scale statistical algorithm, and the view data of imageing sensor output is calculated, and obtains optimum exposure time; Then carry out following steps: imageing sensor is reconfigured and shooting, output image data; In limited number of times, repeat above process until total gray-scale value of target gray-scale statistical result and expectation value relatively meet gray scale requirement, or the time shutter reached the high-low limit setting in advance, export and store present image.
Above-mentioned spread spectrum transponder aerial adopts both arms helical antenna; Antenna net gain, be better than-6dBi in beam area ± 57 °, be better than-10dBi in beam area ± 90 °, be better than-12dBi of all the other scopes.
It is to carry out analysis and calculation by being observed size, the change in location of image in image that above-mentioned space video is measured computing method, draws the movement velocity and the direction of motion that are observed the relative Use of Video-TLM probe of thing.
The measuring method of the space video of a kind of satellite of the present invention, owing to having adopted above technical scheme, makes space video measuring method of the present invention, has following advantage and good effect than prior art:
1, Use of Video-TLM sonde configuration provided by the invention is simple, quality is less, significant to the satellite that total arrangement's nargin is limited;
2, space video measuring method provided by the invention is carried out the transmission of view data in telemetering channel via satellite, has the advantage of low data bulk, low bit rate rate, low-power consumption, and the satellite not high to space measurement accuracy requirement is with a wide range of applications.
Therefore, the invention solves power consumption, layout all under limited condition video measuring obtain problem, obtained complete function, realized the beneficial effects such as easy.
Brief description of the drawings
Fig. 1 is space video measuring system composition schematic diagram of the present invention;
Fig. 2 is Use of Video-TLM probe auto-exposure control step schematic diagram of the present invention;
Fig. 3 is the imaging effect figure of space video measuring method application example of the present invention.
Embodiment
Below in conjunction with accompanying drawing, several preferred embodiments of the present invention are described in detail, but the present invention is not restricted to these embodiment.The present invention contain any in marrow of the present invention and scope, make substitute, amendment, equivalent method and scheme.In order to make the public that the present invention is had thoroughly and be understood, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have for a person skilled in the art the description of these details also can understand the present invention completely.
Fig. 1 is space video measuring system composition schematic diagram of the present invention, this system comprises: the Use of Video-TLM probe being arranged on satellite is connected with spread spectrum answering machine, antenna by answering machine sends a signal to ground receiving station, carries out ground restore generation ground image by land station.
The measuring method of the space video of a kind of satellite of the present invention, utilizes said system to carry out the measurement of space video, and its measuring method comprises following step:
The Use of Video-TLM probe that utilization is arranged on satellite carries out video capture to the object of observation in space, adopt automatic exposure method of adjustment, the view data that shooting is obtained is carried out framing, undertaken after spread spectrum and rf modulations by spread spectrum answering machine, have the signal of view data to launch earthward modulation by transponder aerial;
Land station receives and restores after image data frame, is measured computing method and calculated direction of relative movement and the movement velocity of space object by space video.
The light path part of above-mentioned Use of Video-TLM probe adopts visible ray, fixed focal length imaging, and resolution is better than 100 × 100, and the present embodiment is 174 × 144.Field angle is preferably ± and 20 °, this example is ± 22.4 °; Its circuit control section adopts CPLD as main control chip, and the memory capacity of storer is 20 width images; The above-mentioned view data that shooting is obtained is carried out framing, and output image telemetry frame bit rate is 8192bps.
Other side, equipment power dissipation peak value (when shooting) is 2.9W, and long-term power consumption is lower than 2W, and quality is 0.4kg, and overall dimensions are 90mm × 90mm × 56.5mm.
Above-mentioned automatic exposure method of adjustment is taked gray-scale statistical algorithm, and the view data of imageing sensor output is calculated, and obtains optimum exposure time.Fig. 2 is Use of Video-TLM of the present invention probe auto-exposure control step schematic diagram, and as shown in Figure 2, this step comprises: according to current optimum exposure time, imageing sensor is reconfigured and shooting, output image data; In limited number of times, repeat above process until total gray-scale value of target gray-scale statistical result and expectation value relatively meet gray scale requirement, or the time shutter reached the high-low limit setting in advance, export and store present image.
The form of above-mentioned view data framing is: the total frame length of every frame is 256Byte, wherein has 251Byte to can be used for transmit image data.
Above-mentioned spread spectrum answering machine has adopted direct sequence spread spectrum, and spread-spectrum pseudo code speed is 10.23Mbps, and radio-frequency emission power is better than 27dBm, reaches 29dBm.
The antenna of above-mentioned spread spectrum answering machine adopts both arms helical antenna; Antenna net gain is be better than-6dBi in beam area ± 57 °, be better than-10dBi in beam area ± 90 °, be better than-12dBi of all the other scopes.
Above-mentioned space video is measured computing method and is carried out analysis and calculation by being observed size, the change in location of image in image, draws the movement velocity and the direction of motion that are observed the relative Use of Video-TLM probe of thing.
Fig. 3 is design sketch, is the image of space video measuring method application example of the present invention.
In sum, satellite spatial video measuring method of the present invention, has following advantage and good effect than prior art:
1, Use of Video-TLM sonde configuration provided by the invention is simple, quality is less, significant to the satellite that total arrangement's nargin is limited;
2, space video measuring method provided by the invention is carried out the transmission of view data in telemetering channel via satellite, has the advantage of low data bulk, low bit rate rate, low-power consumption, and the satellite not high to space measurement accuracy requirement is with a wide range of applications.
The preferred embodiment of the present invention is just for helping to set forth the present invention.Preferred embodiment does not have all details of detailed descriptionthe, and also not limiting this invention is only described embodiment.Obviously,, according to the content of this instructions, can make many modifications and variations.These embodiment are chosen and specifically described to this instructions, is in order to explain better principle of the present invention and practical application, thereby under making, technical field technician can utilize the present invention well.Instrument of the present invention is subject to the restriction of claims and four corner and equivalent.
Claims (1)
1. a measuring method for the space video of satellite, is characterized in that, the method comprises the steps:
The Use of Video-TLM probe that utilization is arranged on satellite carries out video capture to the object of observation in space, adopt automatic exposure method of adjustment, the view data that shooting is obtained is carried out framing, undertaken after spread spectrum and rf modulations by spread spectrum answering machine, have the signal of view data to launch earthward modulation by spread spectrum transponder aerial;
Land station receives and restores after image data frame, is measured computing method and calculated direction of relative movement and the movement velocity of space object by space video;
The light path part of described Use of Video-TLM probe adopts visible ray, fixed focal length imaging, and resolution is better than 100 × 100, and field angle is scholar 20
0; Its circuit control section adopts CPLD as main control chip, and the memory capacity of storer is 20 width images;
Described employing automatic exposure method of adjustment, the view data that shooting is obtained are carried out framing, and its output image telemetry frame bit rate is 8192bps;
Described automatic exposure method of adjustment is taked gray-scale statistical algorithm, and the view data of imageing sensor output is calculated, and obtains optimum exposure time; Then carry out following steps:
Imageing sensor is reconfigured and shooting, output image data; In limited number of times, repeat above process until total gray-scale value of target gray-scale statistical result and expectation value relatively meet gray scale requirement, or the time shutter oneself reach the high-low limit setting in advance, export and store present image;
Described carries out framing by view data, and its form is: the total frame length of every frame is 256Byte, wherein has 251Byte to can be used for transmit image data;
Described spread spectrum answering machine adopts direct sequence spread spectrum, and spread-spectrum pseudo code speed is 10.23Mbps, and radio-frequency emission power is better than 27dBm;
Described spread spectrum transponder aerial adopts both arms helical antenna; Antenna net gain is beam area scholar 57
0inside be better than-6dBi, beam area scholar 90
0inside be better than-10dBi be better than-12dBi of all the other scopes;
It is to carry out analysis and calculation by being observed size, the change in location of image in image that described space video is measured computing method, draws the movement velocity and the direction of motion that are observed the relative Use of Video-TLM probe of thing.
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| TWI547626B (en) | 2013-05-31 | 2016-09-01 | 原相科技股份有限公司 | Apparatus having the gesture sensor |
| CN109343708B (en) * | 2013-06-13 | 2022-06-03 | 原相科技股份有限公司 | Device with gesture sensor |
| CN105259905A (en) * | 2015-10-20 | 2016-01-20 | 中国人民解放军国防科学技术大学 | Networked man-in-the-loop satellite control system and control method thereof |
| CN105357472B (en) * | 2015-10-20 | 2016-08-24 | 中国人民解放军国防科学技术大学 | remote sensing satellite system video image real-time transmission method |
| CN105426964B (en) * | 2015-11-03 | 2017-03-15 | 合肥工业大学 | A kind of satellite imagery and the Joint Task planing method that transmits |
| CN113242407A (en) * | 2021-04-25 | 2021-08-10 | 西安微电子技术研究所 | Satellite-borne real-time visual remote measuring system |
| CN115633259B (en) * | 2022-11-15 | 2023-03-10 | 深圳市泰迅数码有限公司 | Automatic regulation and control method and system for intelligent camera based on artificial intelligence |
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| FR2920615B1 (en) * | 2007-08-31 | 2011-01-28 | Centre Nat Etd Spatiales | INSTRUMENT FOR ACQUIRING AND DISTRIBUTING LAND-OBSERVING IMAGES WITH HIGH SPACE AND TEMPORAL RESOLUTION |
| CN101707734A (en) * | 2009-05-25 | 2010-05-12 | 南京师范大学 | Adaptive acquiring and sending device for mobile time-space positioning video-audio data |
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Inventor after: Hou Jianwen Inventor after: Zhou Weimin Inventor after: Zhang Yingjie Inventor after: Rao Qilong Inventor after: Gao Bei Inventor after: Han Xu Inventor before: Rao Qilong Inventor before: Zhang Yingjie Inventor before: Gao Bei Inventor before: Han Xu |
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