CN106526690A - Extrasolar planetary space-based high-precision detection system and method for radial velocity measurement - Google Patents
Extrasolar planetary space-based high-precision detection system and method for radial velocity measurement Download PDFInfo
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- CN106526690A CN106526690A CN201611082708.1A CN201611082708A CN106526690A CN 106526690 A CN106526690 A CN 106526690A CN 201611082708 A CN201611082708 A CN 201611082708A CN 106526690 A CN106526690 A CN 106526690A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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Abstract
The invention discloses an extrasolar planetary space-based high-precision detection system and method for radial velocity measurement. The system comprises an incident light adjustment module and the like, and the incident light adjustment module is used for collimating the incident light emitted by a host star to be observed. A differential interference and dispersion module consists of two reflectors, a spectroscope and a grating. The differential interference and dispersion module divides the incident light of the host star into two light beams through the spectroscope. The two light beams are emitted to and then reflected by the two reflectors respectively. Then the two light beams are combined through the spectroscope to form interference, and then the interference light is dispersed by the grating. The invention uses the differential interferometric radial velocity measurement technology, carries out the spectral analysis by the combination of the differential interference technique and the grating dispersion principle, realizes the high precision radial velocity measurement so as to realize the detection of the extrasolar planets.
Description
Technical field
The present invention relates to a kind of detection system and method, more particularly to a kind of radial velocity measurement is outer planet space-based
Detected with high accuracy system and method.
Background technology
Doppler effect of the radial velocity measuring principle based on light.When target light source to be observed is near observer, observation
To spectrum blue shift can occur, and when target light source to be observed is away from observer, the spectrum for observing can occur red shift.Pass through
Spectrum is analyzed, speed of the target light source to be observed in observer's line of vision can be calculated.It is outer planet and its host's fixed star
Due to graviational interaction, Keplerian motion can be done around their common barycenter, cause the movement velocity generating period of host's fixed star
Change.Using the Doppler effect of light, implement radial velocity observation to host's fixed star, by the fitting of data, can obtain
The radial velocity amplitude of host's fixed star, period of change, track relevant information.In the graviational interaction by planet and its host's fixed star
Relation is obtained the information of planet, so as to the observation for realizing being outer planet.
To realize the high-acruracy survey of the radial velocity, the fine observation of host's stellar spectrum need to be realized.It is outer planet at present
Mainly based on ground based observa tion, scope mainly realizes spectrum with crossed dispersion echelon chromatic dispersion principle for radial velocity observation
Analysis.Space borne detection avoids the impact of earth atmosphere compared to ground observation, become be outer planet observation the side of giving priority to
To the configured relevant device of part Space borne detection system.
The content of the invention
What the technical problem to be solved was to provide a kind of radial velocity measurement is that outer planet space-based high accuracy is visited
Examining system and method, which adopts surely poor interference formula radial velocity e measurement technology, with reference to fixed poor interference technique and grating dispersion principle
Spectrum analyses are carried out, high-precision radial velocity measurement is capable of achieving, so as to the detection for realizing being outer planet.
The present invention is solving above-mentioned technical problem by following technical proposals：A kind of radial velocity measurement is layman
Star space-based detected with high accuracy system, which includes boarding planet to be observed, host's fixed star to be observed, incident illumination adjusting module, fixed poor
Interfere and dispersion compensation module, image acquisition and data processing module, incident illumination adjusting module is for an incident place to be observed
The light that main fixed star sends is collimated；Fixed poor interference includes two reflecting mirrors, a spectroscope and a grating with dispersion compensation module
Constitute, fixed poor interference is divided into two-beam by the incident host's star aberration of spectroscope with dispersion compensation module, incides two respectively instead
Penetrate, again pass by spectroscope and converge, formed and interfered, then interference light carries out dispersion through grating；Image acquisition with
Data processing module includes detector and data processor, and image acquisition is used to receive surely poor interference and color with data processing module
The emergent light of scattered module, is acquired to interference fringe by detector, and by the information transmission for obtaining to data processor, data
The cycle movement pass formed due to graviational interaction with reference to a boarding planet to be observed and host's fixed star to be observed by processor
It is that the signal for obtaining is processed, resolves radial velocity information.
Preferably, the radial velocity measurement is that outer planet space-based detected with high accuracy system is equally applicable to be outer planet
Ground detected with high accuracy.
What the present invention also provided a kind of radial velocity measurement is outer planet space-based detected with high accuracy method, it is characterised in that
Which comprises the following steps：
Step one, boarding planet to be observed is with host's fixed star to be observed as gravitation forms relative motion；
Step 2, enter after observing light premenstrual end optical system (such as the telescope) Collecting and dealing that sends of host's fixed star into
Penetrate light adjusting module；
Step 3, incident illumination adjusting module are collimated to incident illumination；
Step 4, fixed poor interference carry out light splitting, reflection, interference, dispersion with the incident illumination after dispersion compensation module collimation；
Step 5, fixed poor interference are made up of two reflecting mirrors, spectroscope, gratings with dispersion compensation module；
Step 6, incident host's star aberration Jing spectroscopes light splitting form two beams, incide respectively anti-on two reflecting mirrors
Penetrate, again pass by spectroscope and converge, formed and interfered, then Jing grating dispersions；
Step 7, image acquisition and data processing module, receive fixed poor interference and the emergent light of dispersion compensation module, carry out image
Collection and data processing；Image acquisition includes detector and data processor with data processing module；
Step 8, detector are acquired to interference fringe, and by the information transmission of collection to data processor；
Step 9, data processor are processed to the signal for obtaining, computing speed information.
The present invention positive effect be：The present invention is layman using fixed poor interference formula radial velocity e measurement technology
Star space-based detected with high accuracy method, due to taking above-mentioned principle scheme, using fixed poor interference technique, arranges fixed optical path difference,
Realize speed to be measured to the conversion of phase place；Using the dispersion characteristics of grating, the interference fringe of different color light is carried out into spatial dispersion；
Phase place change information is obtained using the change of interference fringe, so as to resolve radial velocity information, the observation of host's fixed star is completed, is led to
Cross and resolve the observation for being capable of achieving boarding planet.The present invention adopts fixed poor interference formula radial velocity e measurement technology, with reference to fixed poor interference
Technology and grating dispersion principle carry out spectrum analyses, are capable of achieving high-precision radial velocity measurement, so as to realize being outer planet
Detection.
Description of the drawings
Fig. 1 is the principle schematic of the present invention.
Specific embodiment
Present pre-ferred embodiments are given below in conjunction with the accompanying drawings, to describe technical scheme in detail.
As shown in figure 1, radial velocity measurement of the present invention is that outer planet space-based detected with high accuracy system includes that incident illumination is adjusted
Mould preparation block 3, fixed poor interference and dispersion compensation module 4, image acquisition and data processing module 8, incident illumination adjusting module 3 is for incidence
The light that sends of host's fixed star to be observed 2 collimated；Fixed poor interference includes two reflecting mirrors 5, with dispersion compensation module 4
Spectroscope 6 and a grating 7 are constituted, and fixed poor interference is divided into two beams by host's star aberration of 6 incidence of spectroscope with dispersion compensation module 4
Light, incides respectively, again pass by spectroscope 6 and converge, formed and interfered, and then interference light is through light
Grid 7 carry out dispersion；Image acquisition is included at detector 9 and data processor 10, image acquisition and data with data processing module 8
Reason module 8 is used to receive surely poor interference and the emergent light of dispersion compensation module 4, interference fringe is acquired by detector 9, and will be obtained
, to data processor 10, data processor 10 is permanent with reference to a boarding planet 1 to be observed and host to be observed for the information transmission for obtaining
Star 2 is processed due to the signal of the cycle movement relation pair acquisition formed by graviational interaction, resolves radial velocity information.
Radial velocity measurement is that outer planet space-based detected with high accuracy system is equally applicable to be outer planet ground high accuracy
Detection.
What the present invention also provided a kind of measurement of the radial velocity is outer planet space-based detected with high accuracy method, including following step
Suddenly：
Step one, boarding planet 1 to be observed is with host's fixed star 2 to be observed as gravitation forms relative motion；
Step 2, enters after observing light premenstrual end optical system (such as the telescope) Collecting and dealing that host's fixed star 2 sends
Incident illumination adjusting module 3；
Step 3, incident illumination adjusting module 3 are collimated to incident illumination；
Step 4, fixed poor interference carry out light splitting, reflection, interference, dispersion with the incident illumination after 4 collimation of dispersion compensation module；
Step 5, fixed poor interference are made up of two reflecting mirrors 5, spectroscope 6, grating 7 with dispersion compensation module 4；
Step 6, incident 6 light splitting of host star aberration Jing spectroscopes form two beams, are incided on two reflecting mirrors 5 respectively
Reflection, again passes by spectroscope 6 and converges, and is formed and is interfered, then 7 dispersion of Jing gratings；
Step 7, image acquisition and data processing module 8, receive fixed poor interference and the emergent light of dispersion compensation module 4, carry out figure
As collection and data processing；Image acquisition includes detector 9 and data processor 10 with data processing module 8；
Step 8, detector 9 are acquired to interference fringe, and by the information transmission of collection to data processor 10；
Step 9, the signal of 10 pairs of acquisitions of data processor are processed, computing speed information.
The operation principle of the present invention is as follows：It is an object of the invention to provide a kind of surveyed using the fixed poor interference formula radial velocity
Amount technology is outer planet space-based detected with high accuracy system, and the system utilizes fixed poor interference and grating dispersion spectrophotometry,
The spectrum change of observation host's fixed star, measures the radial velocity information of host's fixed star, so as to the observation for realizing being outer planet.Utilize
The present invention, can accurately measure the spectral Doppler change of host's fixed star, calculates the radial velocity of host's fixed star, and realization is outer planet
Space-based detected with high accuracy.
In order to reach foregoing invention purpose, the present invention is to provide employing by solving the technical scheme that its technical problem is adopted
Fixed poor interference formula radial velocity e measurement technology is outer planet space-based detected with high accuracy system, and its idiographic flow is as follows：
(1) it is divided into incident illumination adjusting module, determined at poor intervention module, dispersion compensation module, image acquisition and data by function
Reason module.
(2) target host fixed star used as light source, determine into follow-up Jing after the adjustment of incident illumination adjusting module by the light which sends
Difference intervention module.
(3) fixed poor interference is adjusted to incident illumination with dispersion compensation module, is formed interference fringe, and is carried out dispersion shape to striped
Into being spatially separating.Due to Doppler effect, its spectrum can periodically produce red shift, blue shift and replace host's fixed star, the interference of observation
Striped will produce drift, be presented as phase drift.
(4) image acquisition carries out imaging acquisition to the interference fringe after dispersion with data processing module；The week of the radial velocity
The change of phase property causes the periodicity phase transformation of interference fringe, resolves phase changing capacity by the change of striped, permanent so as to resolve host
The radial velocity of astrology.
(5) fitting of data is observed to the radial velocity, can obtain the radial velocity amplitude of host's fixed star, period of change,
Track relevant information, is obtained the information of planet by the graviational interaction relation of planet and host's fixed star.
Proposed by the present invention is outer planet space-based detected with high accuracy system using determine poor interference formula radial velocity e measurement technology
Based on following principle, system proposes which specifically includes：
One, spectral Doppler effect.When target light source has relative velocity with observer, the spectrum for observing will produce many
General Le effect, produces red shift or blue shift.When the radial velocity is v, the fixed star optical wavelength for observing is changed into λ ', both sides relation from λ
For λ '=(c+v) λ/c.
Two, fixed poor interference technique.Using surely poor interference structure, arrange two and interfere arm lengths difference to be Δ d.Optical path difference Δ d
With phase placeRelation beBefore and after spectrum frequency displacement, radial velocity variable quantity with phase place change relation is
Three, fixed star and planet.Target host fixed star and its lodge between planet due to graviational interaction formed cycle movement.Fortune
Dynamic speed and intensity of variation are directly related with host's fixed star, boarding planet.
The present invention is outer planet space-based detected with high accuracy system using fixed poor interference formula radial velocity e measurement technology, is taken
Above-mentioned principle scheme, using fixed poor interference technique, arranges fixed optical path difference, realizes speed to be measured to the conversion of phase place；Utilize
The interference fringe of different color light is carried out spatial dispersion by the dispersion characteristics of grating；Phase place is obtained using the change of interference fringe to become
Change information, so as to resolve radial velocity information, completes the observation of host's fixed star, by resolving the observation for being capable of achieving boarding planet.
In sum, the fixed poor interference formula radial velocity e measurement technology of employing involved in the present invention, with reference to fixed poor interference
Technology and grating dispersion principle carry out spectrum analyses, are capable of achieving high-precision radial velocity measurement, so as to realize being outer planet
Detection.
Particular embodiments described above, the technical problem, technical scheme and beneficial effect to the solution of the present invention are carried out
Further describe, it is be should be understood that to the foregoing is only specific embodiment of the invention, it is not limited to
The present invention, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc., should be included in this
Within the protection domain of invention.
Claims (3)
1. a kind of radial velocity measurement is outer planet space-based detected with high accuracy system, it is characterised in that the radial velocity is surveyed
Amount is that outer planet space-based detected with high accuracy system includes incident illumination adjusting module, fixed poor interference and dispersion compensation module, image acquisition
With data processing module, incident illumination adjusting module is for collimating to the light that incident host's fixed star to be observed sends；
Fixed poor interference includes two reflecting mirrors, a spectroscope and a grating composition, fixed poor interference and dispersion compensation module with dispersion compensation module
Two-beam is divided into by the incident host's star aberration of spectroscope, is incided respectively, again pass by light splitting
Mirror converges, and is formed and is interfered, and then interference light carries out dispersion through grating；Image acquisition and data processing module include detector and
Data processor, image acquisition are used to receive the emergent light of surely poor interference and dispersion compensation module with data processing module, by detector
Interference fringe is acquired, and by the information transmission for obtaining to data processor, data processor to be observed is posted with reference to one
The signal of the cycle movement relation pair acquisition formed due to graviational interaction by Su Hangxing and host's fixed star to be observed is processed,
Resolve radial velocity information.
2. radial velocity measurement as claimed in claim 1 is outer planet space-based detected with high accuracy system, it is characterised in that institute
State radial velocity measurement is that outer planet space-based detected with high accuracy system is equally applicable to be outer planet ground detected with high accuracy.
3. a kind of radial velocity measurement is outer planet space-based detected with high accuracy method, it is characterised in which comprises the following steps：
Step one, boarding planet to be observed is with host's fixed star to be observed as gravitation forms relative motion；
Step 2, enters incident illumination adjusting module after observing the premenstrual end optical system Collecting and dealing of light that host's fixed star sends；
Step 3, incident illumination adjusting module are collimated to incident illumination；
Step 4, fixed poor interference carry out light splitting, reflection, interference, dispersion with the incident illumination after dispersion compensation module collimation；
Step 5, fixed poor interference are made up of two reflecting mirrors, spectroscope, gratings with dispersion compensation module；
Step 6, incident host's star aberration Jing spectroscopes light splitting form two beams, incide respectively, then
It is secondary to converge through spectroscope, formed and interfered, then Jing grating dispersions；
Step 7, image acquisition and data processing module, receive fixed poor interference and the emergent light of dispersion compensation module, carry out image acquisition
And data processing；Image acquisition includes detector and data processor with data processing module；
Step 8, detector are acquired to interference fringe, and by the information transmission of collection to data processor；
Step 9, data processor are processed to the signal for obtaining, computing speed information.
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| CN111220997A (en) * | 2020-01-20 | 2020-06-02 | 西安工业大学 | DFDI instrument apparent velocity inversion method |
| CN113325483A (en) * | 2021-04-23 | 2021-08-31 | 上海卫星工程研究所 | Space-based multi-mode extrasystematic and extraterrestrial planet comprehensive detection method and system |
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Application publication date: 20170322 |