CN108594265A - Windfinding radar system and dimensional wind detection method - Google Patents
Windfinding radar system and dimensional wind detection method Download PDFInfo
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- CN108594265A CN108594265A CN201810871822.5A CN201810871822A CN108594265A CN 108594265 A CN108594265 A CN 108594265A CN 201810871822 A CN201810871822 A CN 201810871822A CN 108594265 A CN108594265 A CN 108594265A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
A kind of windfinding radar system of the embodiment of the present application offer and dimensional wind detection method.The continuous laser signal branch of generation is first laser signal and second laser signal by laser generator, and the first laser signal after amplifying power is exported first laser signal progress laser amplifier to again by optical circulator along the first predetermined direction by laser amplifier.Laser emission reception device by first laser signal along different directions to detection objective emission, and exported along the second predetermined direction by optical circulator after receiving corresponding echo optical signal.The echo optical signal exported with the second laser signal and optical circulator of the luminous power of echo optical signal that photo-coupler exports optical attenuator is optically coupled to obtain mixed frequency signal and is converted to electric signal by photoelectric converter, and finally carrying out signal processing to electric signal by data acquisition processing device obtains dimensional wind distributed intelligence.Thereby, it is possible to reduce detection noise, while increasing the washability of laser light source, effectively reduces cost.
Description
Technical field
This application involves Radar Technology fields, in particular to a kind of windfinding radar system and dimensional wind detection side
Method.
Background technology
Wind field information is one of main meteorological factor of Atmospheric Survey, and change in time and space characteristic is the important number in meteorology
According to either surface wind or upper-level winds all have a great impact to mankind's activity.Conventional weather forecast, hazard weather prison
The weather such as survey, wind shear and atmospheric turbulance ensure information and to fields such as the environmental protection researchs of air pollutants drift, all to wind
The fine observation of field has tight demand.Wind field mainly is measured using instruments such as anemoclinograph, wind profile radars at present, is swashed
Light windfinding radar is one of survey wind devices with fastest developing speed in recent years.
However current LDV technique detection noise is larger and higher to the power requirement of laser light source, structure is multiple
It is miscellaneous, and then increase cost.
Apply for content
In order to overcome above-mentioned deficiency in the prior art, the application's is designed to provide a kind of windfinding radar system and three
Wind field detection method is tieed up, detection noise can be reduced, while increasing the washability of laser light source, effectively reduced cost.
To achieve the goals above, the technical solution that the embodiment of the present application uses is as follows：
In a first aspect, the embodiment of the present application provides a kind of windfinding radar system, the windfinding radar system includes：
For generating continuous laser signal and being that first laser signal and second swashs by the continuous laser signal branch of generation
The laser generator of optical signal；
It is electrically connected with the laser generator, for the first laser signal to be carried out laser amplifier to be put
The laser amplifier of first laser signal after high-power；
It is connect with the laser amplifier, the ring of light shape for exporting the first laser signal along the first predetermined direction
Device；
Connect with the optical circulator, for by the first laser signal along different directions to detection objective emission, with
The atmospheric aerosol particle around the detection target is set to generate echo optical signal to the first laser signal, and described in reception
The Laser emission reception device of echo optical signal, the optical circulator are additionally operable to the echo optical signal along the second predetermined direction
Output；
With the laser generator be electrically connected, for by the optical power adjustment of the second laser signal be with it is described
The matched optical attenuator of luminous power of echo optical signal；
It is connect respectively with the optical attenuator and the optical circulator, the adjustment light work(for exporting the optical attenuator
The echo optical signal of second laser signal and optical circulator output after rate is optically coupled to obtain the optocoupler of mixed frequency signal
Clutch；
It is connect with the photo-coupler, the photoelectric converter for the mixed frequency signal to be converted to electric signal；And
It is connect with the photoelectric converter, the three of the detection target is obtained for carrying out signal processing to the electric signal
Tie up the data acquisition processing device of wind field distributed intelligence.
Optionally, the laser generator includes：
Laser light source for generating continuous laser signal；
It is connect with the laser light source, for being first laser signal and second laser by the continuous laser signal branch
The optical branching device of signal.
Optionally, the laser generator further includes：
It is connected between the laser light source and the optical branching device, for stopping that it is described sharp that the echo optical signal returns
The optoisolator of radiant.
Optionally, the Laser emission reception device includes switching photoswitch and is connect with the switching photoswitch each
The optical antenna of a direction of the launch；
The switching photoswitch is used to control the direction of the launch of the first laser signal, and the first laser signal is made to pass through
Emitted from the optical antenna of corresponding direction to detection target.
Optionally, the Laser emission reception device includes rotating prism and the optics day being connect with the rotating prism
Line；
The rotating prism makes described for being adjusted to the direction of the launch of the optical antenna after rotation angle
One laser signal emits via the optical antenna to detection target according to the corresponding direction of the launch.
Optionally, the Laser emission reception device further includes the window mirror being correspondingly arranged with the optical antenna, described
The first laser signal of optical antenna output emits via the window mirror to detection target.
Optionally, the data acquisition processing device includes data acquisition board and data processing equipment；
The data acquisition board is carried out for acquiring the transformed electric signal of the photoelectric converter, and to the electric signal
Signal processing obtains cumulative spectrum signal, and the cumulative spectrum signal is sent to the data processing equipment；
The dimensional wind point of the detection target is calculated based on the cumulative spectrum signal for the data processing equipment
Cloth information.
Optionally, the mode that cumulative spectrum signal is obtained to electric signal progress signal processing includes：
The electric signal is converted into corresponding digital signal；
Framing is carried out to the digital signal and obtains multiframe digital signal, and frequency spectrum processing is carried out to every frame of digital signal
Afterwards, the spectrum signal after frequency spectrum processing is added up successively to generate the spectrum signal that adds up；
The cumulative spectrum signal is subjected to signal amplification, obtains the amplified cumulative spectrum signal of signal；
Cumulative spectrum signal amplified to the signal carries out noise processed, obtains the letter of the cumulative frequency spectrum after noise processed
Number.
Optionally, the dimensional wind distributed intelligence that the detection target is calculated based on the cumulative spectrum signal
Mode, including：
Search the peak point of the cumulative spectrum signal；
The second laser signal after the adjustment luminous power of optical attenuator output and described is calculated based on the peak point
Frequency displacement between the echo optical signal of optical circulator output；
The wind speed that current direction of the launch test is calculated according to the frequency displacement, to obtain the wind speed of each direction of the launch test；
The horizontal wind speed and vertical wind speed of wind field are calculated according to the wind speed of each direction of the launch test；
The wind speed and direction of wind field is calculated according to the horizontal wind speed and the vertical wind speed, to obtain the detection
The dimensional wind distributed intelligence of target.
Second aspect, the embodiment of the present invention also provide a kind of dimensional wind detection method, are applied to above-mentioned windfinding radar
System, the method includes：
The laser generator generates continuous laser signal, and is first laser by the continuous laser signal branch of generation
Signal and second laser signal；
The laser amplifier swashs first laser signal progress laser amplifier to obtain first after amplifying power
Optical signal；
The optical circulator exports the first laser signal along the first predetermined direction；
The Laser emission reception device by the first laser signal along different directions to detection objective emission so that institute
The atmospheric aerosol particle stated around detection target generates echo optical signal to the first laser signal, and receives the echo
Output is to the optical circulator after optical signal；
The optical circulator exports the echo optical signal along the second predetermined direction；
The optical attenuator by the optical power adjustment of the second laser signal be and the matched light of the echo optical signal
Power；
Second laser signal after the adjustment luminous power that the photo-coupler exports the optical attenuator and the ring of light
The echo optical signal of shape device output is optically coupled to obtain mixed frequency signal；
The mixed frequency signal is converted to electric signal by the photoelectric converter；
The data acquisition processing device carries out signal processing to the electric signal and obtains the three-dimensional wind of the detection target
Field distribution information.
In terms of existing technologies, the application has the advantages that：
A kind of windfinding radar system of the embodiment of the present application offer and dimensional wind detection method.Laser generator will generate
Continuous laser signal branch be first laser signal and second laser signal, and by laser amplifier by first laser signal
Laser amplifier is carried out again to export the first laser signal after amplifying power along the first predetermined direction by optical circulator.Laser is sent out
Penetrate reception device by first laser signal along different directions to detection objective emission, and pass through after receiving corresponding echo optical signal
Optical circulator is exported along the second predetermined direction.Second with the luminous power of echo optical signal that photo-coupler exports optical attenuator
Laser signal and the echo optical signal of optical circulator output are optically coupled to obtain mixed frequency signal and be converted by photoelectric converter
For electric signal, signal processing finally is carried out to electric signal by data acquisition processing device and obtains dimensional wind distributed intelligence.As a result,
Luminous power by increasing the echo optical signal that optical attenuator adjusts the luminous power of local oscillator light and detection returns matches, and can reduce
Noise is detected, while by increasing image intensifer and optical attenuator, ensureing the stability of laser, increasing the optional of laser light source
Property, it effectively reduces cost.
Description of the drawings
It, below will be to needed in the embodiment attached in order to illustrate more clearly of the technical solution of the embodiment of the present application
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is instrumentation radar systematic difference schematic block diagram provided by the embodiments of the present application；
Fig. 2 is the structure diagram of laser generator shown in Fig. 1；
Fig. 3 is the structure diagram of Laser emission reception device shown in Fig. 1；
Fig. 4 is the structural schematic diagram of Laser emission reception device provided by the embodiments of the present application；
Fig. 5 is the structure diagram of data acquisition processing device shown in Fig. 1；
Fig. 6 is the sight relation schematic diagram of uniform flow provided by the embodiments of the present application；
Fig. 7 is the flow diagram of dimensional wind detection method provided by the embodiments of the present application.
Icon：100- instrumentation radar systems；110- laser generators；112- laser light sources；114- optoisolators；116-
Optical branching device；120- laser amplifiers；130- optical circulators；140- Laser emission reception devices；142- switches photoswitch；144-
Optical antenna；145- antenna fixation kits；146- window mirrors；150- optical attenuators；160- photo-couplers；170- opto-electronic conversions
Device；180- data acquisition processing devices；182- data acquisition boards；184- data processing equipments.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiments herein to providing in the accompanying drawings be not intended to limit it is claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
All other embodiment that technical staff is obtained without creative efforts belongs to the model of the application protection
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present application, it should be noted that the term of the orientation or positional relationship of some instructions is based on attached
Orientation or positional relationship shown in figure or this application product using when the orientation or positional relationship usually put, be only for
It is described convenient for description the application and simplifying, specific side must be had by not indicating or implying the indicated device or element
Position, with specific azimuth configuration and operation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second "
It is described etc. being only used for distinguishing, is not understood to indicate or imply relative importance.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；Can be
Mechanical connection can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood in the application with concrete condition
In concrete meaning.
Below in conjunction with the accompanying drawings, it elaborates to some embodiments of the application.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Referring to Fig. 1, applying schematic block diagram for instrumentation radar system 100 provided by the embodiments of the present application.The present embodiment
In, the windfinding radar system includes laser generator 110, laser amplifier 120, optical circulator 130, Laser emission reception
Device 140, optical attenuator 150, photo-coupler 160, photoelectric converter 170 and data acquisition processing device 180.
In the present embodiment, the laser generator 110 is used to generate continuous laser signal and swashs the continuous of generation
Optical signal branch is first laser signal and second laser signal.Wherein, in other embodiment, the continuous laser signal
It could alternatively be pulsed laser signal.
The laser amplifier 120 is electrically connected with the laser generator 110, is used for the first laser signal
Laser amplifier is carried out to obtain the first laser signal after amplifying power.The optical circulator 130 and the laser amplifier 120
Connection, for exporting the first laser signal along the first predetermined direction.The Laser emission reception device 140 and the light
Circulator 130 connects, and is used for the first laser signal along different directions to detection objective emission, so that the detection target
The atmospheric aerosol particle of surrounding generates echo optical signal to the first laser signal, and receives the echo optical signal, this
Shi Suoshu optical circulators 130 are additionally operable to export the echo optical signal along the second predetermined direction.The optical attenuator 150 and institute
The electric connection of laser generator 110 is stated, for being to believe with the echo light by the optical power adjustment of the second laser signal
Number luminous power matching.The photo-coupler 160 is connect with the optical attenuator 150 and the optical circulator 130 respectively, is used for
By the second laser signal and the echo that exports of the optical circulator 130 after adjustment luminous power that the optical attenuator 150 exports
Optical signal is optically coupled to obtain mixed frequency signal.The photoelectric converter 170 is connect with the photo-coupler 160, is used for institute
It states mixed frequency signal and is converted to electric signal.The data acquisition processing device 180 is connect with the photoelectric converter 170, for pair
The electric signal carries out signal processing and obtains the dimensional wind distributed intelligence of the detection target.
Based on above-mentioned design, the echo light that the luminous power of local oscillator light is returned with detection is adjusted by increasing optical attenuator 150
The luminous power of signal matches, and can reduce detection noise, while by increasing image intensifer and optical attenuator 150, ensureing laser
The stability of device increases the washability of laser light source 112, effectively reduces cost, to obtain the three-dimensional wind of the detection target
Field distribution information.
It is worth noting that the detection target can be wind field, airport, amblent air temperature etc., it is not specifically limited herein.
Optionally, Fig. 2 is please referred to, the laser generator 110 may include for generating continuous laser signal
It laser light source 112 and is connect with the laser light source 112, for being first laser signal by the continuous laser signal branch
With the optical branching device 116 of second laser signal.
Optionally, still referring to Fig.2, the laser generator 110 can also include being connected to the laser light source 112
Between the optical branching device 116, for stopping that the echo optical signal returns to the optoisolator 114 of the laser light source 112.
Ensure that light path prolongs a direction transmission by the isolation of optoisolator 114 as a result, it is described sharp to reduce echo optical signal return
Radiant 112 ensures the stability of the laser light source 112, reduces system noise.
A kind of embodiment of the Laser emission reception device 140 please refers to Fig. 3 and Fig. 4, the Laser emission
Reception device 140 can also include switching photoswitch 142 and switch each direction of the launch that photoswitch 142 is connect with described
Optical antenna 144.The switching photoswitch 142 is used to control the direction of the launch of the first laser signal, makes described first to swash
Optical signal emits via the optical antenna 144 of corresponding direction to detection target, it is possible thereby to realize the detection of multiple directions.
Wherein, the switching photoswitch 142 can be used for completing light path switching, in order to ensure switch speed, the switching light
Switch 142 can use switch at high speed photoswitch 142, so that switch speed is reached within 1ms.
Optionally, focus lamp or scanning mirror may be used in the optical antenna 144, to keep investigative range wider, institute
Stating the quantity of optical antenna 144 can arrange in pairs or groups according to the requirement of actual detection point, be not specifically limited herein.
In addition, the another embodiment as the Laser emission reception device 140, the Laser emission reception device
140 can also be including rotating prism and 144 (not shown) of optical antenna being connect with the rotating prism.The rotation
Prism for being adjusted to the direction of the launch of the optical antenna 144 after rotation angle, make the first laser signal by
Emit to detection target via the optical antenna 144 according to the corresponding direction of the launch.It is taken as a result, by single optical antenna 144
With rotating prism, the purpose that adjustment prism rotation angle realizes multi-direction detecting can be led to, to reduce optical antenna 144 at
This.
Optionally, Fig. 3 and Fig. 4 is please referred to, the Laser emission reception device 140 can also include and the optics
The window mirror 146 that antenna 144 is correspondingly arranged, the first laser signal that the optical antenna 144 exports is via the window mirror 146
Emit to detection target.In a kind of embodiment, the Laser emission reception device 140 can also include antenna fixation kit
145, as shown in figure 4, each optical antenna 144 is both secured on the antenna fixation kit 145, the antenna fixation group
A through-hole is provided on part 145, the window mirror 146 is fixed in the through-hole so that the transmitting of each optical antenna 144
Direction is directed at the window mirror 146.
In the present embodiment, the window mirror 146 can be infrared light transmission glass, be coated on the infrared light transmission glass infrared
Anti-reflection film and waterproof membrane can increase the transmitance of infrared light by the infrared anti-reflection film, consequently facilitating optic path, simultaneously
Dust can be prevented to be adhered on window mirror 146 by the waterproof membrane, influence optic path.
Optionally, further referring to Fig. 5, the data acquisition processing device 180 may include 182 He of data acquisition board
Data processing equipment 184.The data acquisition board 182 is used to acquire 170 transformed electric signal of the photoelectric converter, and right
The electric signal carries out signal processing and obtains cumulative spectrum signal, and the cumulative spectrum signal is sent to the data processing
Device 184.The dimensional wind of the detection target is calculated based on the cumulative spectrum signal for the data processing equipment 184
Distributed intelligence.
As an implementation, obtaining cumulative spectrum signal to electric signal progress signal processing can be by as follows
Mode is realized：
First, the electric signal is converted into corresponding digital signal.
Then, framing is carried out to the digital signal and obtains multiframe digital signal, and frequency spectrum is carried out to every frame of digital signal
After processing, the spectrum signal after frequency spectrum processing is added up successively to generate the spectrum signal that adds up.
Then, the cumulative spectrum signal is subjected to signal amplification, obtains the amplified cumulative spectrum signal of signal.
Finally, cumulative spectrum signal amplified to the signal carries out noise processed, obtains cumulative after noise processed
Spectrum signal.
As an implementation, the dimensional wind point of the detection target is calculated based on the cumulative spectrum signal
Cloth information can be realized in the following way：
First, the peak point of the cumulative spectrum signal is searched.Wherein, the cumulative spectrum signal is that the distribution of frequency is bent
Line can obtain the peak point of cumulative spectrum signal in the distribution curve of the frequency.
Then, the second laser letter after the adjustment luminous power of the output of the optical attenuator 150 is calculated based on the peak point
Number the optical circulator 130 export echo optical signal between frequency displacement.
Then, the wind speed that current direction of the launch test is calculated according to the frequency displacement, to obtain each direction of the launch test
Wind speed.Wherein, the calculation formula that the wind speed of current direction of the launch test is calculated according to the frequency displacement is：
Wherein, Δ f is frequency displacement, and λ is wavelength.
Then, the horizontal wind speed and vertical wind speed of wind field are calculated according to the wind speed of each direction of the launch test.Specifically, exist
After obtaining the wind speed of each direction of the launch test, Fig. 6 is please referred to, the sight relation that can obtain uniform flow is：
Vlos1,2=wcos (α) ± usin (α)
Wherein, w is horizontal wind speed, and the calculation formula of w is：
U is horizontal wind speed, and the calculation formula of u is：
Finally, the wind speed and direction of wind field is calculated according to the horizontal wind speed and the vertical wind speed, to obtain
State the dimensional wind distributed intelligence of detection target.
The wind speed V of wind field is：
The wind direction of wind field φ is：
The wind direction of the wind speed V of the wind field and the wind field φ are the dimensional wind distributed intelligence for detecting target as a result,.
Further, referring to Fig. 7, being based on above-mentioned windfinding radar system 100, the embodiment of the present application also provides a kind of three-dimensional
Wind field detection method, described method includes following steps：
Step S110, the laser generator 110 generates continuous laser signal, and the continuous laser signal of generation is divided
Road is first laser signal and second laser signal.
The first laser signal is carried out laser amplifier to obtain amplification work(by step S120, the laser amplifier 120
First laser signal after rate.
Step S130, the optical circulator 130 export the first laser signal along the first predetermined direction.
Step S140, the Laser emission reception device 140 by the first laser signal along different directions to detection mesh
Mark transmitting, so that the atmospheric aerosol particle around the detection target generates echo optical signal to the first laser signal,
And it is exported to the optical circulator 130 after receiving the echo optical signal.
Step S150, the optical circulator 130 export the echo optical signal along the second predetermined direction.
The optical power adjustment of the second laser signal is and the echo light by step S160, the optical attenuator 150
The luminous power of Signal Matching.
Step S170, the second laser after the adjustment luminous power that the photo-coupler 160 exports the optical attenuator 150
The echo optical signal that signal and the optical circulator 130 export is optically coupled to obtain mixed frequency signal.
The mixed frequency signal is converted to electric signal by step S180, the photoelectric converter 170.
Step S190, the data acquisition processing device 180 carry out signal processing to the electric signal and obtain the detection
The dimensional wind distributed intelligence of target.
The detailed process for each step that dimensional wind detection method provided in this embodiment includes please refers to above-mentioned implementation
The corresponding description of example, details are not described herein.
In conclusion the continuous laser signal branch of generation is first laser signal and second laser by laser generator
Signal, and first laser signal is carried out again by optical circulator by the after amplifying power by laser amplifier by laser amplifier
One laser signal is exported along the first predetermined direction.Laser emission reception device by first laser signal along different directions to detection mesh
Mark transmitting, and exported along the second predetermined direction by optical circulator after receiving corresponding echo optical signal.Photo-coupler is by light decay
The echo optical signal exported with the second laser signal and optical circulator of the luminous power of echo optical signal for subtracting device output carries out light
Coupling obtain mixed frequency signal and electric signal be converted to by photoelectric converter, finally by data acquisition processing device to electric signal into
Row signal processing obtains dimensional wind distributed intelligence.Luminous power and the detection of local oscillator light are adjusted by increasing optical attenuator as a result,
The luminous power of the echo optical signal of return matches, and can reduce detection noise, while by increasing image intensifer and optical attenuator,
The stability for ensureing laser, increases the washability of laser light source, effectively reduces cost.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and scope of the present application is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included in the application.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (10)
1. a kind of windfinding radar system, which is characterized in that the windfinding radar system includes：
For generating continuous laser signal and being that first laser signal and second laser are believed by the continuous laser signal branch of generation
Number laser generator；
It is electrically connected with the laser generator, for the first laser signal to be carried out laser amplifier to obtain amplification work(
The laser amplifier of first laser signal after rate；
It is connect with the laser amplifier, the optical circulator for exporting the first laser signal along the first predetermined direction；
It connect, is used for the first laser signal along different directions to detection objective emission, so that institute with the optical circulator
The atmospheric aerosol particle stated around detection target generates echo optical signal to the first laser signal, and receives the echo
The Laser emission reception device of optical signal, the optical circulator are additionally operable to the echo optical signal is defeated along the second predetermined direction
Go out；
It is electrically connected with the laser generator, for being and the echo by the optical power adjustment of the second laser signal
The matched optical attenuator of luminous power of optical signal；
It is connect respectively with the optical attenuator and the optical circulator, after the adjustment luminous power for exporting the optical attenuator
Second laser signal and the optical circulator output echo optical signal be optically coupled to obtain the photo-coupler of mixed frequency signal；
It is connect with the photo-coupler, the photoelectric converter for the mixed frequency signal to be converted to electric signal；And
It is connect with the photoelectric converter, the three-dimensional wind of the detection target is obtained for carrying out signal processing to the electric signal
The data acquisition processing device of field distribution information.
2. windfinding radar system according to claim 1, which is characterized in that the laser generator includes：
Laser light source for generating continuous laser signal；
It is connect with the laser light source, for being first laser signal and second laser signal by the continuous laser signal branch
Optical branching device.
3. windfinding radar system according to claim 2, which is characterized in that the laser generator further includes：
It is connected between the laser light source and the optical branching device, for stopping that the echo optical signal returns to the laser light
The optoisolator in source.
4. windfinding radar system according to claim 1, which is characterized in that the Laser emission reception device includes switching
The optical antenna of photoswitch and each direction of the launch being connect with the switching photoswitch；
The switching photoswitch is used to control the direction of the launch of the first laser signal, makes the first laser signal via right
The optical antenna in direction is answered to emit to detection target.
5. windfinding radar system according to claim 1, which is characterized in that the Laser emission reception device includes rotation
Prism and the optical antenna being connect with the rotating prism；
The rotating prism makes described first to swash for being adjusted to the direction of the launch of the optical antenna after rotation angle
Optical signal emits via the optical antenna to detection target according to the corresponding direction of the launch.
6. the windfinding radar system according to claim 4 or 5, which is characterized in that the Laser emission reception device is also
Include the window mirror being correspondingly arranged with the optical antenna, the first laser signal of the optical antenna output is via the window
Mirror emits to detection target.
7. windfinding radar system according to claim 1, which is characterized in that the data acquisition processing device includes data
Collection plate and data processing equipment；
The data acquisition board carries out signal for acquiring the transformed electric signal of the photoelectric converter, and to the electric signal
Processing obtains cumulative spectrum signal, and the cumulative spectrum signal is sent to the data processing equipment；
The dimensional wind that the detection target is calculated based on the cumulative spectrum signal for the data processing equipment is distributed letter
Breath.
8. windfinding radar system according to claim 7, which is characterized in that described to carry out signal processing to the electric signal
The mode for obtaining cumulative spectrum signal includes：
The electric signal is converted into corresponding digital signal；
Framing is carried out to the digital signal and obtains multiframe digital signal, and after carrying out frequency spectrum processing to every frame of digital signal, it will
Spectrum signal after frequency spectrum processing is added up successively to generate the spectrum signal that adds up；
The cumulative spectrum signal is subjected to signal amplification, obtains the amplified cumulative spectrum signal of signal；
Cumulative spectrum signal amplified to the signal carries out noise processed, obtains the cumulative spectrum signal after noise processed.
9. windfinding radar system according to claim 7, which is characterized in that described to be calculated based on the cumulative spectrum signal
The mode of the dimensional wind distributed intelligence of the detection target is obtained, including：
Search the peak point of the cumulative spectrum signal；
The second laser signal after the adjustment luminous power of the optical attenuator output and the ring of light are calculated based on the peak point
Frequency displacement between the echo optical signal of shape device output；
The wind speed that current direction of the launch test is calculated according to the frequency displacement, to obtain the wind speed of each direction of the launch test；
The horizontal wind speed and vertical wind speed of wind field are calculated according to the wind speed of each direction of the launch test；
The wind speed and direction of wind field is calculated according to the horizontal wind speed and the vertical wind speed, to obtain the detection target
Dimensional wind distributed intelligence.
10. a kind of dimensional wind detection method, which is characterized in that be applied to the survey wind described in any one of claim 1-9
Radar system, the method includes：
The laser generator generates continuous laser signal, and is first laser signal by the continuous laser signal branch of generation
With second laser signal；
The first laser signal is carried out laser amplifier to obtain the letter of the first laser after amplifying power by the laser amplifier
Number；
The optical circulator exports the first laser signal along the first predetermined direction；
The Laser emission reception device by the first laser signal along different directions to detection objective emission so that the spy
The atmospheric aerosol particle surveyed around target generates echo optical signal to the first laser signal, and receives the echo light letter
Output is to the optical circulator after number；
The optical circulator exports the echo optical signal along the second predetermined direction；
The optical attenuator by the optical power adjustment of the second laser signal be and the matched luminous power of the echo optical signal；
Second laser signal after the adjustment luminous power that the photo-coupler exports the optical attenuator and the optical circulator
The echo optical signal of output is optically coupled to obtain mixed frequency signal；
The mixed frequency signal is converted to electric signal by the photoelectric converter；
The data acquisition processing device carries out signal processing to the electric signal and obtains the dimensional wind point of the detection target
Cloth information.
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