CN107045130A - A kind of Portable type full-automatic micropulse anemometry laser radar system - Google Patents
A kind of Portable type full-automatic micropulse anemometry laser radar system Download PDFInfo
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- CN107045130A CN107045130A CN201710130560.2A CN201710130560A CN107045130A CN 107045130 A CN107045130 A CN 107045130A CN 201710130560 A CN201710130560 A CN 201710130560A CN 107045130 A CN107045130 A CN 107045130A
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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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- 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
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Abstract
The disclosure discloses a kind of Portable type full-automatic micropulse anemometry laser radar system, and the system has filled up the vacancy of domestic portable coherent wind laser radar system, and there is provided a set of anemometry laser radar system based on 1.55 mu m all-fiber devices.The system bulk is small, lightweight, low in energy consumption, and suitable single carrying, deployment, single pulse energy are low, and positioned at human eye safe waveband；Function is excluded with upper electric fully automatic operation function, mistake self-inspection；Remote configuration can be carried out by Beidou communication system, to obtain different detection height, the vector wind field data of different height resolution ratio, vector wind field data also can communicate remote transmission by Big Dipper short message.
Description
Technical field
The disclosure belongs to laser radar detection air field, and wind laser is surveyed in more particularly to a kind of Portable type full-automatic micropulse
Radar system.
Technical background
The detection of surface layer wind field is all to short-term weather prediction, military and national defense, aviation safety early warning, wind energy assessment etc.
It is many-sided all significant.Using laser radar to surface layer measuring wind speed, microwave radar can be made up and detected in clear sky
Deficiency, while measurement when can obtain higher measuring wind speed precision and range resolution ratio.It is complicated and changeable in order to adapt to
Measurement request, portable coherent wind laser radar system turns into development trend.
The content of the invention
Based on this, the disclosure discloses a kind of Portable type full-automatic micropulse anemometry laser radar system, the system bag
Include：
Industrial computer, wave form driver, main oscillations laser, amplifying stage laser, transmitting-receiving optics device, 2 × 2 fiber couplings
Device, balanced type detector；
The industrial computer is the control centre of the system；
The system sends teleinstruction by user to industrial computer, so that the data acquisition and upper electricity to system are controlled
System；
The wave form driver is used to produce repetition rate for 10k~20kHz, and high level width is 100~500ns electricity
Signal waveform；
The main oscillations laser is used to produce continuous local oscillator light and seed laser, and the main oscillations laser root
Seed laser is modulated to pulse laser according to the waveform of wave form driver；
The pulse laser of generation is sent to amplifying stage laser by the main oscillations laser, by produced continuous local oscillator
Light is sent to 2 × 2 fiber couplers；
The amplifying stage laser is used to be amplified the pulse laser received and export to transmitting-receiving optics device；
The transmitting-receiving optics device is used to receiving the pulse laser that particulate is exported to amplifying stage laser in air
Backscattering echo optical signal, exports the backscattering echo optical signal to amplifying laser, and from amplification laser output
To 2 × 2 fiber couplers；
2 × 2 fiber coupler is used to mix continuous local oscillator light and backscattering echo optical signal, and will be mixed
Optical signal after conjunction is exported to balanced type detector；
The balanced type detector is used to detect the mixed optical signal, and result of detection is converted into electric signal,
And exported the electric signal.The beneficial effect of the disclosure is：
1st, the disclosure uses the full-optical-fiber laser and all-fiber devices of eye-safe, and system bulk is small by (≤500 × 500
× 300mm), lightweight (≤30kg), (operation power consumption≤100W, stand-by power consumption≤10W) low in energy consumption, environmental suitability it is stronger
(operating ambient temperature：0 DEG C -40 DEG C, waterproof), it is easy to single carry to dispose, it is easy to safeguard；System electrification fully automatic operation, is fitted
Close layman's operation；System is communicated by Beidou communication system with control centre, realizes Remote configuration and long-range real-time
Obtain measurement result.
2nd, the disclosure has high (the wind speed precision of height resolution adjustable (50-300m), measuring wind speed precision：≤1m/s、
Wind direction precision：≤ ± 10 °), temporal resolution high (≤3s) the features such as.
Brief description of the drawings
Fig. 1 is a kind of Portable type full-automatic micropulse coherent wind laser radar system frame in disclosure one embodiment
Figure；
Wherein：1- main oscillations lasers, 1-1 is that seed laser, 1-2 are that one-to-two fiber optic splitter, 1-3 are that acousto-optic is adjusted
Device processed, 2- amplifying stage lasers, 2-1 is fiber amplifier, and 2-2 is optical fiber circulator, 3- transmitting-receiving optics devices, 3-1 be beam expanding lens,
3-2 is telescope, and 3-3 is wedge-shaped scanning mirror, 4- wave form drivers, and 5 be 2 × 2 fiber couplers, 6- balanced type detectors, 7-
Scan module driver, 8- industrial computers, 9- acquisition process circuits, 10- serial ports switch modules, 11- electronic compass, the 12- Big Dippeves lead to
Interrogate module；
Fig. 2 (a) realizes deflection and scan function principle for transmitting-receiving optics device in disclosure one embodiment to pulse laser
Figure；
Fig. 2 (b) is scan module, wedge-shaped mirrors and electronic compass angle of assembling schematic diagram in disclosure one embodiment.
Embodiment
The disclosure is discussed in detail with reference to Fig. 1-2 the drawings and the specific embodiments.
In one embodiment, the disclosure discloses a kind of Portable type full-automatic micropulse anemometry laser radar system, institute
The system of stating includes：
Industrial computer, wave form driver, main oscillations laser, amplifying stage laser, transmitting-receiving optics device, 2 × 2 fiber couplings
Device, balanced type detector；
The industrial computer is the control centre of the system；
The system sends teleinstruction by user to industrial computer, so that the data acquisition and upper electricity to system are controlled
System；
The wave form driver is used to produce repetition rate for 10k~20kHz, and high level width is 100~500ns electricity
Signal waveform；
The main oscillations laser is used to produce continuous local oscillator light and seed laser, and the main oscillations laser root
Seed laser is modulated to pulse laser according to the waveform of wave form driver；
The pulse laser of generation is sent to amplifying stage laser by the main oscillations laser, by produced continuous local oscillator
Light is sent to 2 × 2 fiber couplers；
The amplifying stage laser is used to be amplified the pulse laser received and export to transmitting-receiving optics device；
The transmitting-receiving optics device is used to receiving the pulse laser that particulate is exported to amplifying stage laser in air
Backscattering echo optical signal, exports the backscattering echo optical signal to amplifying laser, and from amplification laser output
To 2 × 2 fiber couplers.
2 × 2 fiber coupler is used to mix continuous local oscillator light and backscattering echo optical signal, and will be mixed
Optical signal after conjunction is exported to balanced type detector；
The balanced type detector is for detecting the mixed optical signal, and result of detection being converted into electric signal
Row output.
More excellent, the system also includes Big Dipper communication module；
The Big Dipper communication module is used to serve as the medium that information exchange is carried out between user and industrial computer.
The purpose of the present embodiment is that the vacancy for filling up domestic portable coherent wind laser radar system is based on there is provided a set of
Wavelength is the anemometry laser radar system of 1.55 μm of all-fiber devices.System main feature has：Small volume, lightweight, power consumption
It is low, it is adapted to single carrying, deployment；Single pulse energy is low, and positioned at human eye safe waveband；With upper electric fully automatic operation function,
Mistake self-inspection excludes function；Remote configuration can be carried out by Beidou communication module, to obtain different detection height, different height
The vector wind field data of resolution ratio, vector wind field data can also pass through Beidou communication module remote transmission.
System described in the disclosure is automatically upper electric, and instruction is remotely sent by user and carries out system electrification, instruction is sent
System is run according to default configuration parameters afterwards, equally, user can also remotely located parameter, arrange parameter include detection distance
Resolution ratio, detection range, working time etc..User sends instruction and started after measurement, and Beidou communication module receives instruction transmission
To industrial computer, laser, capture card, detector, motor driver module is respectively started by serial ports switch module in industrial computer,
Operate in that primary control program on industrial computer waits in all modules electricity success and in stable condition (mainly energy of lasers is stable needs
Time of several seconds is wanted, depending on laser) after, sent according to acquiescence acquisition parameter or user by Beidou communication module
Acquisition parameter sets capture card and motor driver, obtains industrial computer after result and result is sent into use by Beidou communication module
Family.What the fully automatic operation of the disclosure was mainly realized by operating in the primary control program on industrial computer.
System described in the disclosure employs the laser of all -fiber and the relay optical system of all -fiber, compared to solid
Laser and free space relaying light path, integrated level is higher, weight lighter, volume is also smaller.
System described in the disclosure is closed the high laser of power consumption by serial ports switch module under non-acquired state, adopted
The modules such as truck, motor driver, only retain industrial computer and Beidou communication module are in running order.Simultaneously as employing
Full-optical-fiber laser, electro-optical efficiency is higher.
As shown in Figure 1：The system includes industrial computer, main oscillations laser, wave form driver, amplifying stage laser, receipts
Luminescence device, 2 × 2 fiber couplers, balanced type detector, Beidou communication module.
The industrial computer includes 8 ports, and port 1 is connected with the wave form driver port 1, port 2 and the waveform
Driver port 1 is connected, and port 3 is connected with the amplifying stage laser port 1, port 4 and the acquisition process circuit port 1
Be connected, port 7 is connected with the Beidou communication module port 1.
The main oscillations laser includes 4 ports, and port 1 is connected with the industrial computer port 2, port 2 and the ripple
Shape driver port 2 is connected, and port 3 is connected with the amplifying stage laser port 2, port 4 and 2 × 2 fiber coupler
Port 1 is connected.
The wave form driver includes two ports, and port 1 is connected with the industrial computer port 1, and port 2 shakes with the master
Laser port 2 is swung to be connected.The waveform that the wave form driver is sent depends on laser characteristic, usually triangular wave.
The amplifying stage laser includes 4 ports, and port 1 is connected with the industrial computer port 3, port 2 and the master
Oscillating laser port 3 is connected, and port 3 is connected with the transmitting-receiving optics device port 1, port 4 and 2 × 2 fiber coupler
Port 2 is connected.
The transmitting-receiving optics device includes 2 ports, and port 1 is connected with the amplifying stage laser port 3.
2 × 2 fiber coupler includes 4 ports, and port 1 is connected with the main oscillations laser port 4, port 2
It is connected with the amplifying stage laser port 4, port 3 and 4 is connected with the balanced type detector port 1 and 2.
The balanced type detector includes 3 ports, port 1 and 2 respectively with 2 × 2 fiber coupler port 3 and 4
It is connected.
The Beidou communication module includes 1 port, is connected with industrial computer port 7.
Industrial computer 8 is System Control Center, using low-power consumption, high-performance, embedded, miniaturization industrial computer.Industrial computer 8 with
Wave form driver 4 is connected by USB port, and control wave form driver 4 produces the waveform of different repetition rates, different duty,
Wave form driver 4 is connected with main oscillations laser 1 by coaxial cable, driving main oscillations laser 1 produce different repetition rates,
The pulse laser of pulsewidth；Industrial computer 8 is connected with main oscillations laser 1 by serial ports, control and the work for reading main oscillations laser 1
Make state；Industrial computer 8 is connected with amplifying stage laser 2 by serial ports, and control and reading amplifying stage laser 2 export pulse energy
And working condition；Industrial computer 8 is connected with Beidou communication module 12 by serial ports, and row information is entered by Beidou communication module and user
Exchange.
In one embodiment, the main oscillations laser includes：Seed laser, one-to-two fiber optic splitter, acousto-optic
Modulator；
The seed laser is used to launch narrow linewidth continuous laser, and the narrow linewidth continuous laser passes through one-to-two optical fiber
After beam splitter beam splitting, a portion is exported to 2 × 2 fiber couplers as continuous local oscillator light, and another part is exported to acousto-optic
Modulator, is used as seed light；
The waveform that the acousto-optic modulator is exported according to the wave form driver received, input seed light modulation is output as
Pulse laser, the pulse laser is exported to amplifying stage laser by single-mode polarization maintaining fiber.
It is more excellent, it is described that input seed light modulation is output as pulse laser and is specially：According to heterodyne detection principle, to planting
Sub-light produces additional shift frequency amount, obtains pulse laser, the pulse laser is exported to amplifying stage laser by single-mode polarization maintaining fiber
Device.
In the present embodiment, as shown in Figure 1：The main oscillations laser 1 includes seed laser 1-1, one-to-two optical fiber
Beam splitter 1-2, acousto-optic modulator 1-3.Wherein seed laser 1-1 launches narrow linewidth continuous laser, by beam splitter 1-2 beam splitting
Afterwards, a portion is as continuous local oscillator light output to 2 × 2 fiber couplers 5, and another road is exported to acousto-optic modulator 1-3；Sound
Continuous local oscillator light modulation is output as pulse laser, pulse laser by optical modulator 1-3 according to the input waveform of wave form driver 4
Intermediate frequency shift frequency amount is contained relative to local oscillator light, pulse laser is exported to amplifying stage laser 2 by single-mode polarization maintaining fiber.
In one embodiment, the amplifying stage laser includes：Fiber amplifier and optical fiber circulator；
The fiber amplifier is used to amplify the pulse laser passed through, and the pulse laser is delivered into fiber annular
Device；
The optical fiber circulator is switched as optical transmitting and receiving, in the pulse laser and air of launching fiber amplifier
The beam splitting isolation of particulate backscattering echo optical signal.
More excellent, the optical fiber circulator includes three ports, and first port is connected with fiber amplifier, second port with
3rd port is connected with transmitting-receiving optics device and 2 × 2 fiber couplers respectively as the output port of amplifying stage laser；
The pulse laser enters optical fiber circulator from first port, is exported from second port to transmitting-receiving optics device, and from
Optics device is received and dispatched to enter in air.
In the present embodiment, the industrial computer is by controlling the driving current of fiber amplifier, to control the pulse to swash
Output energy of the light after fiber amplifier, the pulse laser after the amplification of fiber amplifier energy is exported to fiber annular
Device；
The optical fiber circulator is switched as optical transmitting and receiving, in the pulse laser and air launched for amplifying stage laser
The beam splitting isolation of particulate backscattering echo optical signal, the wherein particulate in air are transported with atmospheric wind
It is dynamic, there is the speed as atmospheric wind, the speed has velocity component in pulse laser transmission direction, is imitated according to Doppler
Should, there is the Doppler shift frequency amount for being proportional to the velocity component between particulate backscattering echo optical signal and pulsed light
(fd)。
In the present embodiment, the optical fiber circulator is integrated in inside amplifying stage laser so that amplifying stage laser
Allow output maximum impulse energy to be improved, and then make it that the detection range of whole system is lifted.
As shown in Figure 1：Fiber amplifier 2-1 and optical fiber circulator 2-2, work are contained inside the amplifying stage laser 2
Control machine 8 is by controlling fiber amplifier 2-1 driving current, to control pulse laser to export energy after fiber amplifier 2-1
Amount, the pulse laser after energy amplification is exported to optical fiber circulator 2-2.Optical fiber circulator 2-2 is used for transmission signal and echo is believed
Number beam splitting isolation, optical fiber circulator 2-2 includes three ports, and port A is connected with fiber amplifier 2-1, port B and port C
As the output port 3 and output port 4 of amplifying stage laser 2, respectively with the optical fiber coupling of port 1 and 2 × 2 of transmitting-receiving optics device 3
The port 2 of clutch 5 is connected.Pulse laser after amplification enters optical fiber circulator 2-2 from port A, is exported from port B to transmitting-receiving light
Learn device 3；The echo-signal that transmitting-receiving optics device 3 is received enters optical fiber circulator 2-2 from port B, from port C outputs.
In one embodiment, the transmitting-receiving optics device includes：Beam expanding lens, telescope, wedge-shaped mirrors and scan module；
The beam expanding lens is used to expand the pulse laser that optical fiber circulator is exported in advance；
The telescope is used for the angle of divergence for compressing the pulsed laser beam after beam expanding lens；
The scan module is used to change the projected angle of wedge-shaped mirrors emergent light axis in the horizontal plane, so as to realize to wedge-shaped mirrors
Detection of the pulsed laser beam of transmitting in different orientations.
More excellent, the beam expanding lens is connected with optical fiber circulator second port.
More excellent, the beam expanding lens optical axis is overlapped perpendicular to horizontal plane with the transmission direction of pulse laser.
More excellent, the telescope optic axis is with beam expanding lens optical axis coincidence and perpendicular to horizontal plane.
More excellent, the transmitting-receiving optics device is transmitting-receiving coaxial optical system, for receiving in air particulate to light
The backscattering echo optical signal of the pulse laser of fine circulator output, and the backscattering echo optical signal is exported to optical fiber
Circulator, is exported to 2 × 2 fiber couplers from the 3rd port of optical fiber circulator.
In the present embodiment, the wedge-shaped mirrors are arranged on scan module, for deflecting input optical axis, the optical axis after deflection
And electronic compass there are 15 ° to 40 ° angles with vertical direction, projected angle is consistent with scan module origin angle in the horizontal plane, i.e.,
Direct north is consistent, and when scan module is rotated, projected angle can also change optical axis in the horizontal plane, so as to realize in different azimuth
Detection on angle.
In the present embodiment, as shown in Figure 1：The transmitting-receiving optics device 3 is swept including beam expanding lens 3-1, telescope 3-2 and wedge shape
Retouch mirror 3-3.Beam expanding lens 3-1 is expanded to the port 2 of amplifying stage laser 2 output pulsed light；The further squeezed lights of telescope 3-2
Beam divergence angle；Light beam is deflected 20 ° by wedge-shaped scanning mirror 3-3, and when wedge-shaped scanning mirror 3-3 is scanned, light beam can point to not Tongfang
Parallactic angle.System employs transmitting-receiving coaxial optical system, according to light path principle, and echo-signal can equally be coupled into optical fiber
Circulator 2-2 port B.
In one embodiment, the system also include scan module driver, the scan module driver with it is described
Scan module is connected, and controls and read the scanning angle of the pulsed laser beam of transmitting-receiving optics device transmitting, and by the transmitting-receiving
The scanning angle of the pulsed laser beam of optics device transmitting is sent to industrial computer.
In the present embodiment, as shown in Figure 1：The scan module driver includes 2 ports, port 1 and the industry control
Generator terminal mouthful 5 is connected, and port 2 is connected with the transmitting-receiving optics device port 2.Specifically：The scan module driver and transmitting-receiving light
The scan module learned in device is connected, control and the scanning angle for reading transmitting light beam.
In one embodiment, the system also includes electronic compass, and the system is according to the azimuth of electronic compass
The azimuth of the scan module is judged.
In the present embodiment, electronic compass is connected with industrial computer by serial ports, and electronic compass is horizontally mounted in systems, just
North is pointed to (receives and dispatches the scan module in optics device 3 in origin position, launches the side of light beam with transmitting beam origin azimuth
Parallactic angle) it is consistent.
In one embodiment, 2 × 2 fiber coupler is single mode polarization-maintaining equal proportion output optical fibre, two inputs
It is connected respectively with main oscillations laser and amplifying stage laser, the backscattering echo optical signal of particulate and company in air
After continuous local oscillator light is mixed in 2 × 2 fiber couplers, the difference frequency for obtaining backscattering echo optical signal and continuous local oscillator light is believed
Number, exported through 2 × 2 fiber coupler output port equal proportions to balanced type detector.
More excellent, the balanced type detector is used for the difference frequency signal by backscattering echo optical signal and continuous local oscillator light
Be converted to difference frequency electric signal, and by the difference frequency electric signal output to acquisition process circuit.
In the present embodiment, the system is based on optical coherent detection principle.Optical coherent detection principle has makes an uproar close to quantum
The detectivity of sound limit, high s/n ratio.Coherent wind laser radar system launches two beam laser, wherein a branch of is local oscillator
Light, for coherent detection；Another beam is the pulse light after acousto-optic modulator is modulated, and is sent out by telescope and scanner
It is mapped in air.After the faint backscatter signal of particulate is received by telescope, with the relevant mixing of local oscillator light.It is different away from
It is different that the telescopic system time is reached from place's echo-signal.Easily detected intermediate-freuqncy signal, intermediate frequency letter are contained in mixed frequency signal
Number frequency be proportional to radially (detection direction) wind speed size.The radial direction wind speed of different azimuth is obtained by scanning means, is used
The method of Vector modulation obtains dimensional wind information.
In one embodiment, the system also includes acquisition process circuit, and the acquisition process circuit is used to receive
The balanced type detector exports electric signal.The acquisition process circuit includes signal transacting fpga chip, the signal transacting
The embedded algorithm that spectrum analysis is carried out to the electric signal of fpga chip, obtains the power spectrum of difference frequency signal.
In the present embodiment, repeatedly transmitting pulse in the same direction, then respectively to being collected after transmitting every time
Signal carries out power spectrumanalysis, cumulative to these power spectrum to be averaging, and obtains the corresponding signal frequency of power peak, the frequency is just
It is f0+ Δ f, contains Doppler shift frequency amount, radial direction wind speed in this direction is can be obtained by according to Doppler shift frequency amount, not
Vector wind speed is then obtained by way of synthesis with radially detection.
In one embodiment, the system also includes serial ports switch module, the serial ports switch module and industrial computer
It is connected.
When the system needs work, user sends work order by Beidou communication system remote, and industrial computer is received
After the work order of Beidou communication module, wave form driver, main oscillations laser, amplification are controlled by serial ports switch module respectively
Electricity on level laser, scan module driver, balanced detector, acquisition process circuit and electronic compass.
More excellent, it is automatic whether to check scan module in origin Angle Position on motor driver after electricity, if it was not then
Driving scan module turns to origin Angle Position；On electronic compass after electricity success, industrial computer reads the orientation of Current electronic compass
Angle, judges the corresponding azimuth in current motor origin angle, and scan module origin angle is turned into due north azimuth.
On the main oscillations laser after electricity, industrial computer reads the pulse luminous power of main oscillations laser output, waits steady
After fixed, industrial computer control amplifying stage laser works, by setting the driving current of fiber amplifier to control output amplifier stage to swash
The pulse energy of light device；
Industrial computer reads the output pulse energy of amplifying stage laser, after waiting it stable, industrial computer control acquisition process
Circuit is started working；Acquisition process circuit is launched in each pulsed light beam is sampled immediately, and sampling number depends on using
The detection range of family setting, user's setting is also depended in single azimuthal sampling pulse number；Bag is collected to single pulse
Electric signal containing Doppler shift information is handled using embedded spectral analysis algorithm, and detects letter to same azimuth multiple-pulse
Number power spectrum be averaged, multiple-pulse detection is averaged and can effectively suppress noise, while by average power spectra and current system
System azimuth is stored in industrial computer；
Industrial computer controls scan module driver, and driving scan module is rotated, so as to realize transmitting pulsed light beam in difference
Detected on azimuth, calculate dimensional wind information using the Vector modulation algorithm of dimensional wind, and pass through Beidou communication module
By dimensional wind information transfer to user.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to above-described embodiment
The present invention is described in detail, it will be understood by those within the art that；It still can be to above-mentioned each implementation
Technical scheme described in example is modified, or carries out equivalent substitute to which part technical characteristic；And these modification or
Replace, do not make the scope described in the essence disengaging various embodiments of the present invention technology of appropriate technical solution.
Claims (20)
1. a kind of Portable type full-automatic micropulse anemometry laser radar system, it is characterised in that the system includes：
It is industrial computer, wave form driver, main oscillations laser, amplifying stage laser, transmitting-receiving optics device, 2 × 2 fiber couplers, flat
Weighing apparatus formula detector；
The industrial computer is the control centre of the system；
The system sends teleinstruction by user to industrial computer, so that the data acquisition and system electrification to system are controlled
System；
The wave form driver is used to produce repetition rate for 10k~20kHz, and high level width is 100~500ns electric signal
Waveform；
The main oscillations laser is used to produce continuous local oscillator light and seed laser, and the main oscillations laser is according to ripple
Seed laser is modulated to pulse laser by the waveform of shape driver；
The pulse laser of generation is sent to amplifying stage laser by the main oscillations laser, and produced continuous local oscillator light is sent out
Give 2 × 2 fiber couplers；
The amplifying stage laser is used to be amplified the pulse laser received and export to transmitting-receiving optics device；
The transmitting-receiving optics device is used to receiving the backward of the pulse laser that particulate is exported to amplifying stage laser in air
Scatter echo optical signal, exports the backscattering echo optical signal to amplifying laser, and export to 2 from amplification laser ×
2 fiber couplers；
2 × 2 fiber coupler is used to mix continuous local oscillator light and backscattering echo optical signal, and by after mixing
Optical signal export to balanced type detector；
The balanced type detector is used to detect the mixed optical signal, and by result of detection be converted to electric signal carry out it is defeated
Go out.
2. system according to claim 1, it is characterised in that：It is preferred that, the system also includes Big Dipper communication module；
The Big Dipper communication module is used to serve as the medium that information exchange is carried out between user and industrial computer.
3. system according to claim 2, it is characterised in that the main oscillations laser includes：Seed laser, one point
Two fiber optic splitters, acousto-optic modulator；
The seed laser is used to launch narrow linewidth continuous laser；
The one-to-two fiber optic splitter is used to be split the narrow linewidth continuous laser, and the narrow linewidth after beam splitting continuously swashs
Light part output is to 2 × 2 fiber couplers as continuous local oscillator light, and another part is exported to acousto-optic modulator, is used as seed
Light；
The waveform that the acousto-optic modulator is exported according to the wave form driver received, pulse is output as by input seed light modulation
Laser, and the pulse laser is exported to amplifying stage laser.
4. system according to claim 3, it is characterised in that：It is described that input seed light modulation is output as pulse laser tool
Body is：According to optical heterodyne detection principle, additional shift frequency amount is produced to seed light, pulse laser is obtained.
5. system according to claim 3, it is characterised in that the amplifying stage laser includes：Fiber amplifier and light
Fine circulator；
The fiber amplifier is used to amplify the pulse laser passed through, and the pulse laser of the amplification is delivered into fiber annular
Device；
The optical fiber circulator is switched as optical transmitting and receiving, after particulate in the pulse laser and air by reception
Isolation is split to scatter echo optical signal.
6. system according to claim 5, it is characterised in that：The optical fiber circulator includes three ports, first port
Be connected with fiber amplifier, second port and the 3rd port as amplifying stage laser output port, respectively with transmitting-receiving optics
Device and 2 × 2 fiber couplers are connected.
7. system according to claim 6, it is characterised in that：Pulse laser after the energy amplification enters from first port
Enter optical fiber circulator, exported from second port to transmitting-receiving optics device, and from transmitting-receiving optics device enters air.
8. system according to claim 7, it is characterised in that the transmitting-receiving optics device includes：Beam expanding lens, telescope, wedge
Shape mirror and scan module；
The beam expanding lens is used to expand the pulse laser that optical fiber circulator is exported in advance；
The telescope is used for the angle of divergence for compressing the pulsed laser beam after beam expanding lens；
The scan module is used to change the projected angle of wedge-shaped mirrors emergent light axis in the horizontal plane, so as to realize the system to wedge
Detection of the pulsed laser beam of shape mirror transmitting in different orientations.
9. system according to claim 8, it is characterised in that：The system also includes scan module driver, described to sweep
Retouch motor driver with the scan module to be connected, control and read the scanning of the pulsed laser beam of transmitting-receiving optics device transmitting
Angle, and the scanning angle of the pulsed laser beam of the transmitting-receiving optics device transmitting is sent to industrial computer.
10. system according to claim 9, it is characterised in that：The system also includes electronic compass, the system root
The azimuth of the scan module is judged according to the azimuth of electronic compass.
11. system according to claim 8, it is characterised in that：The beam expanding lens is connected with optical fiber circulator second port.
12. system according to claim 8, it is characterised in that：The beam expanding lens optical axis swashs perpendicular to horizontal plane with pulse
The transmission direction of light is overlapped.
13. system according to claim 12, it is characterised in that：The telescope optic axis and beam expanding lens optical axis coincidence and hang down
Directly in horizontal plane.
14. system according to claim 8, it is characterised in that：The transmitting-receiving optics device is transmitting-receiving coaxial optical system, is used
The backscattering echo optical signal for the pulse laser that particulate is exported to optical fiber circulator in reception air, and export institute
Backscattering echo optical signal is stated to optical fiber circulator, is exported from the 3rd port of optical fiber circulator to 2 × 2 fiber couplers.
15. system according to claim 14, it is characterised in that：2 × 2 fiber coupler is single mode polarization-maintaining equal proportion
Output optical fibre, two inputs are connected with main oscillations laser and amplifying stage laser respectively, the continuous local oscillator light with it is backward
After scatter echo optical signal is mixed in 2 × 2 fiber couplers, the difference of backscattering echo optical signal and continuous local oscillator light is obtained
Frequency signal, is exported to balanced type detector through 2 × 2 fiber coupler output port equal proportions.
16. system according to claim 15, it is characterised in that：The system also includes acquisition process circuit, described
Acquisition process circuit is used for the electric signal for receiving the balanced type detector output.
17. system according to claim 16, it is characterised in that：The acquisition process circuit includes signal transacting FPGA cores
Piece, the fpga chip is embedded with the algorithm that power spectrumanalysis is carried out to the electric signal.
18. system according to claim 17, it is characterised in that：The system also includes serial ports switch module, described
Serial ports switch module is connected with industrial computer.
19. system according to claim 18, it is characterised in that：When the system needs work, user passes through the Big Dipper
Communication module remotely sends work order, and industrial computer is received after the work order of Beidou communication module output, opened by serial ports
Close module control respectively wave form driver, main oscillations laser, amplifying stage laser, scan module driver, balanced detector,
It is electric on acquisition process circuit and electronic compass.
20. system according to claim 19, it is characterised in that：After electricity on scan module driver, automatic check is swept
Motor is retouched whether in origin Angle Position, if it was not then driving scan module turns to origin Angle Position；
After electricity on electronic compass, industrial computer reads the azimuth of Current electronic compass, judges current driving scan module origin
The corresponding azimuth in angle, and control scan module origin angle to turn to due north azimuth；
After electricity on main oscillations laser, industrial computer reads the pulsed laser power of main oscillations laser output, waits after stabilization,
Industrial computer controls amplifying stage laser works, by setting the driving current of fiber amplifier to control output amplifier stage laser
Pulse laser；
Industrial computer reads the output pulse laser of amplifying stage laser, after waiting it stable, industrial computer control acquisition process circuit
Start working；Acquisition process circuit is sampled immediately after each amplifying stage laser output pulse laser；
Industrial computer controls scan module driver, and driving scan module is rotated, so as to realize emission pulse laser in different azimuth
Detected on angle, dimensional wind information is calculated using the Vector modulation algorithm of dimensional wind, and by Beidou communication module by three
Wind field information transfer is tieed up to user.
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