CN206757044U - A kind of windfinding radar - Google Patents
A kind of windfinding radar Download PDFInfo
- Publication number
- CN206757044U CN206757044U CN201720367386.9U CN201720367386U CN206757044U CN 206757044 U CN206757044 U CN 206757044U CN 201720367386 U CN201720367386 U CN 201720367386U CN 206757044 U CN206757044 U CN 206757044U
- Authority
- CN
- China
- Prior art keywords
- controller
- eyeglass
- optical
- frequency shift
- shift signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The utility model discloses a kind of windfinding radar, including optical launcher and controller, between by optical fiber and cable connection, optical launcher focuses collimater including first, second focuses collimater, polarization splitting prism, quarter-wave plate and pancratic telescope group and its control system, launch window.First focuses collimater outgoing beam, is launched after polarization splitting prism, quarter-wave plate by pancratic telescope group；The flashlight of return, focus collimater into second through pancratic telescope group, quarter-wave plate, polarization splitting prism and return to controller；Controller includes semiconductor laser, optical filter, colimated light system, focusing system, frequency shift signal analysis system, data collecting card, master control system, power supply.Flashlight enters frequency shift signal analysis system with reference light after optically filtering, collimation, focusing, and analyzing composite calulation by frequency shift signal goes out wind speed size.The purpose of this utility model is to provide that a kind of cost is low, small volume, windfinding radar reasonable in design.
Description
Technical field
It the utility model is related to Radar Technology field, and in particular to a kind of windfinding radar.
Background technology
The radar system for being used to measure air wind speed and direction in the prior art is related to two kinds of direct detection and coherent detection
Detection mode.
Because the component of aerosol particles in air and density are constantly changing, the Doppler of windfinding radar receiver output
There is very big fluctuating in difference frequency signal amplitude, the signal to noise ratio of intermediate-freuqncy signal inevitably has big fluctuating during signal transacting, by
It is the extremely low aerosol particles of reflectivity in the detected object of windfinding radar, the signal transacting of windfinding radar inevitably turns into
Signal transacting under Low SNR, signal to noise ratio can directly affect frequency-measurement accuracy, and then influence measuring wind speed precision, although phase
Dry detection has that measurement relative accuracy is high, operating distance farther out the characteristics of, but the manufacturing cost of coherent detection product is high, product
Price is very expensive, and general enterprises can not bear at all.Direct detection windfinding radar is a kind of product of advantage of lower cost, but
It is that direct detection windfinding radar is complicated in the prior art, it is very more using optics, on the one hand add production cost
And maintenance cost, on the other hand, excessive optics may cause optical path adjusting difficult, or each optical mirror slip to using will
Ask more harsh, it is necessary to use the element consistent to laser polarization direction；Except above mentioned problem, the structure of optical launcher is set
It is more accurate that meter complexity may also directly result in controller design, virtually adds R＆D costs.
Utility model content
The purpose of this utility model is to provide that a kind of cost is low, small volume, windfinding radar reasonable in design.
A kind of windfinding radar provided by the utility model, including optical launcher and controller, the optical launcher with
The controller is by optical fiber and cable connection, and semiconductor laser is in the controller；
The optical launcher includes：
With the light beam that the semiconductor laser is sent through optical fiber transmit to first focus collimater, polarization splitting prism,
Quarter-wave plate and pancratic telescope group；
Light beam is changed into circularly polarized light after the quarter-wave plate from linearly polarized light, and passes through the pancratic telescope
Group is launched to predetermined focal point；The flashlight returned from predetermined focal point is gone the same way return, through the pancratic telescope group to described
After quarter-wave plate, then reflex to described second by the polarization splitting prism and focus collimater；
The controller also includes：
Semiconductor laser controller, optical filter, colimated light system, focusing system, frequency shift signal analyzer, frequency displacement letter
Number controller, data acquisition unit；
Flashlight with it is laggard by passing sequentially through optical filter, colimated light system and focusing system after the optical fiber with reference to light
Enter frequency shift signal analyzer, the frequency shift signal of frequency shift signal analyzer output is exported to data acquisition by frequency shift signal controller
Device.
Alternatively, the pancratic telescope group includes the first eyeglass, the second eyeglass, is provided between pancratic telescope group one-dimensional
Galvanometer, the light beam that will transmit through first eyeglass is rotated alternately by the second eyeglass by one-dimensional galvanometer, to realize that two-way swashs
Light time division emission.
Alternatively, second eyeglass is fixed, and first lens-bearing is on linear slide guide rail platform, and described first
Eyeglass can realize 0~6.4mm displacements relative to second eyeglass.
Alternatively, the two-way laser beam angle that second eyeglass is launched is 60 degree.
Alternatively, the outside of the optical launcher is provided with housing, and the housing is provided with two launch windows, the hair
It is coaxial with two-way light beam that pancratic telescope group is formed to penetrate window.
Alternatively, system power supply is also included in the controller, with the pancratic telescope group control in optical launcher
System processed passes through cable connection；And with data acquisition unit, frequency-shift signaling controller 26, semiconductor laser controller, master control system
System connects inside controller.
Alternatively, the degree of protection of the housing is IP66.
Technical solutions of the utility model, have the following advantages that：
1. a kind of windfinding radar that the present embodiment provides, including semiconductor laser, optical launcher and controller, optics
Transmitter is included with controller by optical fiber and cable connection, optical launcher：First be connected with semiconductor laser focuses
Collimater, polarization splitting prism, quarter-wave plate and pancratic telescope group, light beam is after the quarter-wave plate by line
Polarised light is changed into circularly polarized light, and is launched by pancratic telescope group；The side of polarization splitting prism focuses collimation provided with second
Device, after the reference light that pancratic telescope group is reflected back is by quarter-wave plate, standard is focused into second through polarization splitting prism
Straight device；Flashlight with reference to light by entering after passing sequentially through optical filter, colimated light system and focusing system after the optical fiber
Frequency shift signal analyzer, the frequency shift signal of frequency shift signal analyzer output are exported to data acquisition by frequency shift signal controller
Device.Above-mentioned windfinding radar cost is low, compact-sized, small volume, is easily installed on wind-driven generator or marine detection facility, adopts
The design method separated with optical launcher with controller, laser and frequency shift signal analyzer are avoided by ambient temperature ripple
It is dynamic to influence.
Using transmitting-receiving is coaxial, the design of two-way transmitting, rotated by one-dimensional galvanometer in pancratic telescope group, can will
Laser beam reflexes in the both direction that angle is 60 degree respectively, the timesharing wind speed detection on two-way direction is realized, by data
Composite calulation after collection can also draw two-way angle direction wind speed size.
Using zoom design, by the movement of the first eyeglass in pancratic telescope group, can be achieved to optical launcher
The measuring wind speed of scope various point locations between two-way light beam radial direction 10-120 rice.
Using optically filtering design, flashlight enters Analysis by frequency shift system, very great Cheng after being handled by optically filtering
Useful signal is remained on degree, reduces noise jamming, improves measurement accuracy rate.
Optical launcher uses optical element quantity few, takes full advantage of the optical characteristics of optical element, largely
On reduce maintenance and the maintenance cost that the later stage may bring.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the utility model structural schematic block diagram.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Conflict can is not formed to be combined with each other.
Embodiment 1
A kind of windfinding radar that the present embodiment provides, it is shown in Figure 1, including optical launcher 1 and controller 2, optics
Transmitter 1 and controller 2 are connected by the optical cable 3,4 and cable 5 of about 10 meters of length.Optical launcher is fixed on outer by support
Boundary, support are trigonometric expression support feet fixed form, and about 1 meter of height, optical launcher 1 is placed on support, optical launcher 1 week
Enclose and lighting protection frame is installed, controller is installed on inside car body, hull, body or other nacelles, and both pass through 10 meters of optical cables
3,4 and cable 5 connect.
Semiconductor laser 20 effectively avoids ambient temperature from drastically changing influence semiconductor inside controller 2
Laser works performance, the light beam that semiconductor laser 20 is launched enter optical launcher 1 by polarization maintaining optical fibre 3.Specifically, protect
What polarisation fibre 3 was transmitted into optical launcher 1 first focuses collimater 10, and beam diameter is 2.15mm after collimation, and light beam passes through
It is coupled to after polarization splitting prism 11 except small part light beam about 0.1% or so reflexes to second and focus collimater 17 as reference light
Outside single-mode fiber 4, most of light beam about 99.9% passes through institute through polarization splitting prism 11 to quarter-wave plate 12, light beam
State and circularly polarized light be changed into from linearly polarized light after quarter-wave plate 12, and by pancratic telescope group through occur window 6 launch to
Predetermined focal point；The flashlight being reflected back from predetermined focal point is gone the same way return, through pancratic telescope group to quarter-wave plate 12
Afterwards, signal polarization state is changed into linearly polarized light from circularly polarized light, and polarization direction is rotated by 90 °, then by polarization splitting prism 11
Reflex to second and focus and controller 2 is returned to by single-mode fiber 4 after collimater 17.Second focuses collimater 17 makes as coupler
With reference light and flashlight being transmitted back into controller coupled to single-mode fiber 4, first, which focuses collimater 10 and second, focuses collimation
Device 17 takes same specifications and models, to ensure higher coupling efficiency.
The present embodiment sets one-dimensional galvanometer 15 between pancratic telescope group, and two-way timesharing hair can be achieved in pancratic telescope group
To penetrate, the one-dimensional rotational frequency of galvanometer 15 is 2Hz, and the light beam by the first eyeglass 13 is reflexed on the second eyeglass of two panels 14 respectively,
Two panels the second center of lens light path angle is 60 degree, the measuring wind speed along 60 degree of twocouese light beams of angle radially can be achieved, often
Second kind each road time of measuring of interior edge is about 0.5 second.In the present embodiment, pancratic telescope group is 2 eyeglasses, and the first eyeglass 13 can
0~6.4mm displacement, the change of distance between the first eyeglass 13 and the second eyeglass 14 are realized with respect to the second eyeglass 14 along optical path direction
Change the change of corresponding pancratic telescope group total system optical focus position, corresponding to pancratic telescope group in the present embodiment is integrally
Optical focus excursion of uniting is 10-120 rice, that is to say, that can be as needed to optical launcher two-way light beam radial direction 10-
The inside each point wind speed of scope measures between 120 meters.Simulating calculating by optical analysis software can obtain, and be looked in the distance in zoom
In the case that microscope group the first eyeglass 13 and the optical parametric of the second eyeglass 14 determine, distance between the two is decreased to by 271.5mm
During 265.1mm, change between optical system focal length that two eyeglasses are formed is corresponding 10 meters to 120 meters, such as by between the two
Distance be arranged to 271.5mm, 267.4mm, 266.7mm, 266.1mm, 265.8mm, 265.6mm, 265.4mm, 265.2mm,
265.1mm realizes the focusing to 10 meters, 20 meters, 30 meters, 40 meters, 50 meters, 60 meters, 80 meters, 100 meters, 120 meters opening positions.
It should be noted that the first eyeglass 13 is carried on motorized precision translation stage 18, system is controlled by pancratic telescope group
The movement that system 19 realizes 0~6.4mm of motorized precision translation stage, in the present embodiment, the first eyeglass 13 can realize 12.5mm's along guide rail
Displacement, the shift value needed for the measurement of system actual zoom are 6.4mm, and used motor is two-phase stepping motor, electric translation
1 micron of platform repetitive positioning accuracy, 2.5 microns of synchronizing resolution ratio.Pancratic telescope set control system 19 is placed in optical launcher 1
Portion, control the motion of motorized precision translation stage 18 and one-dimensional galvanometer 15.
System power supply 27 provides electric energy for windfinding radar in controller 2, passes through electricity with pancratic telescope set control system 19
Cable 5 connects, and is being controlled with data acquisition unit 23, frequency-shift signaling controller 26, semiconductor laser controller 28, master control system 29
The inside of device 2 connects.Semiconductor laser 20 is connected with semiconductor laser controller 28, in semiconductor laser controller 28
Semiconductor laser temperature controller 281 and semiconductor laser power supply 282 are that semiconductor laser 20 provides temperature adjusting and electric energy.Move
Frequency signal controller 26 is connected with frequency-shift signaling analyzer 22, realizes connecing for the control to frequency-shift signaling analyzer and frequency shift signal
Receipts and enhanced processing.Data acquisition unit 23 is connected with frequency-shift signaling controller 26 and master control system 29, collects frequency-shift signaling control
The frequency-shift signaling that device 26 is passed back, master control system 29 is transmitted back to after arrangement.Master control system 29 and semiconductor laser controller 28, frequency
Shifting signal controller 26, data collecting system 23 are connected, and master control system 29 passes through cable 5 with pancratic telescope group controller 19
It is connected, more than master control system Collaborative Control all unit co-operatings, and the data being transmitted back to data collecting system 23 are carried out
Composite calulation is handled, and realizes the storage and output of final data.
Flashlight focuses collimater 17 coupled to single-mode fiber 4 by second with reference light and transmitted to controller 2, leads to successively
Enter frequency shift signal analyzer 22 after crossing optical filter 21, colimated light system 24, focusing system 25, frequency shift signal analyzer 22 is defeated
The frequency shift signal gone out receives the output of amplification 26 to data acquisition unit 23 by frequency shift signal analyzer-controller, is counted through master control system 29
The wind speed size drawn in the two-way direction of the launch is calculated, and beam angle direction wind speed size can be launched with composite calulation two-way.
In the present embodiment, used optical filter 21 is optical fiber filter, and colimated light system 24 gathers to focus collimater
Burnt system 25 is focus lamp, and frequency shift signal analyzer 22 is scan-type Fabry-Perot interferometer, frequency shift signal controller 26
Amplification system is received for scan-type Fabry-Perot interferometer controller and photosignal, data acquisition unit 23 is independent development
Data collecting card, sample rate 43Hz, per second kind of 20 groups of single channel Data Gathering can be achieved, institute's gathered data transmitted to master
Control system 29 carries out analysis composite calulation.Master control system 29 is built-in industrial control machine.
After single-mode fiber 4 returns to controller 2, frequency filter is carried out coupled to optical fiber filter with flashlight for reference light,
Frequency light beam beyond laser center frequency ± 0.1nm is filtered, beam frequencies bandwidth is decreased to 12GHz.Exported from optical fiber filter
Light beam, the beam diameter after focusing collimater is 3mm, then enters scan-type Fabry-Perot interference by focus lamp
Instrument, the free spectral space of scanning interferometer are 1GHz, fineness 330, it is possible to achieve 3MHz resolution ratio, measurable minimum wind speed
For 2.3m/s, achievable scan frequency is 20-200Hz.Scan-type Fabry-Perot interferometer is by doppler shifted signal
Output is to photodetector, and photodetector receives optical signal and amplification is converted to voltage signal and exported to data collecting card, by
Transmitted after data collecting card sample collection to built-in industrial control machine, built-in industrial control machine and respectively obtain two-way transmitting light by calculating
Wind speed size in the upward wind speed size of beam diameter, and composite calulation two-way light beam radial center angle direction, built-in industrial control machine
With wind of the 1Hz two-way light beam of rate-adaptive pacemaker optical launcher 1 radially and at two-way light beam radial direction angle direction setting focal length
Fast size.
Two-way radiating laser beams light path is corresponded on the shell of optical launcher 1 and is provided with two launch windows, two launch windows go out
It is 60 degree to penetrate central optical path angle, and optical launcher shell sizes are 320*220*150mm, weight 10KG, shell protection grade
For IP66, external dust cannot be introduced into inside it, protect the normal table of optical launcher to work to a certain extent.Controller
2 shell sizes 500*300*180mm, weight 15KG, degree of protection IP30.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (6)
- A kind of 1. windfinding radar, it is characterised in that including optical launcher (1) and controller (2), the optical launcher (1) Connected with the controller (2) by optical fiber (3,4) and cable (5), semiconductor laser (20) is located at the controller (2) It is interior；The optical launcher (1) includes：Transmitted with the light beam that the semiconductor laser (20) is sent through optical fiber (3,4) to first and focus collimater (10), polarization Amici prism (11), quarter-wave plate (12) and pancratic telescope group；Light beam is changed into circularly polarized light after the quarter-wave plate (12) from linearly polarized light, and passes through the pancratic telescope Group is launched to predetermined focal point；The flashlight returned from predetermined focal point is gone the same way return, through the pancratic telescope group to described After quarter-wave plate (12), then reflex to second by the polarization splitting prism (11) and focus collimater (17)；The controller (2) also includes：Semiconductor laser controller (28), optical filter (21), colimated light system (24), focusing system (25), frequency shift signal Analyzer (22), frequency shift signal controller (26), data acquisition unit (23)；Flashlight with reference to light by passing sequentially through optical filter (21), colimated light system (24) and focusing system after the optical fiber (25) frequency shift signal analyzer (22) is entered afterwards, the frequency shift signal of frequency shift signal analyzer (22) output controls by frequency shift signal Device (26) is exported to data acquisition unit (23).
- 2. windfinding radar according to claim 1, it is characterised in that the pancratic telescope group includes the first eyeglass (13), the second eyeglass (14), one-dimensional galvanometer (15) is provided between pancratic telescope group, rotated and will transmit through by one-dimensional galvanometer (15) The light beam of first eyeglass (13) is alternately by the second eyeglass (14), to realize that two-way Laser Time Sharing is launched.
- 3. windfinding radar according to claim 2, it is characterised in that second eyeglass (14) is fixed, first mirror Piece (13) is carried on linear slide guide rail platform (18), and first eyeglass can realize 0 relative to second eyeglass (14) ~6.4mm displacements.
- 4. the windfinding radar according to Claims 2 or 3, it is characterised in that the two-way that second eyeglass (14) is launched Laser beam angle is 60 degree.
- 5. windfinding radar according to claim 1, it is characterised in that the outside of the optical launcher (1) is provided with housing, The housing is provided with two launch windows (6), and the launch window (6) and the two-way light beam that pancratic telescope group is formed are same Axle.
- 6. windfinding radar according to claim 1, it is characterised in that also include system power supply in the controller (2) (27), it is connected with the pancratic telescope set control system (19) in optical launcher (1) by cable (5)；And and data Collector (23), frequency-shift signaling controller (26), semiconductor laser controller (28), master control system (29) are in controller (2) Inside connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720367386.9U CN206757044U (en) | 2017-04-10 | 2017-04-10 | A kind of windfinding radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720367386.9U CN206757044U (en) | 2017-04-10 | 2017-04-10 | A kind of windfinding radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206757044U true CN206757044U (en) | 2017-12-15 |
Family
ID=60613231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720367386.9U Expired - Fee Related CN206757044U (en) | 2017-04-10 | 2017-04-10 | A kind of windfinding radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206757044U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717195A (en) * | 2018-05-24 | 2018-10-30 | 远景能源（江苏）有限公司 | A kind of coherent Doppler wind-observation laser radar system and its control method |
| CN109061671A (en) * | 2018-05-24 | 2018-12-21 | 远景能源（江苏）有限公司 | A kind of device and method for improving LDV technique scene availability |
-
2017
- 2017-04-10 CN CN201720367386.9U patent/CN206757044U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717195A (en) * | 2018-05-24 | 2018-10-30 | 远景能源（江苏）有限公司 | A kind of coherent Doppler wind-observation laser radar system and its control method |
| CN109061671A (en) * | 2018-05-24 | 2018-12-21 | 远景能源（江苏）有限公司 | A kind of device and method for improving LDV technique scene availability |
| CN108717195B (en) * | 2018-05-24 | 2020-12-25 | 远景能源有限公司 | Coherent Doppler wind lidar system and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111337901A (en) | Laser radar for remote detection and detection method thereof | |
| CN103424749B (en) | A kind of Full-optical-fiber laser radar visibility meter | |
| CN110375781B (en) | Adaptive data acquisition system with variable measurement range in OFDR (offset OFDR) | |
| CN102419247B (en) | High-precision detection device and method of reflection type optical fiber turbulence | |
| CN206757044U (en) | A kind of windfinding radar | |
| CN104568826A (en) | Miniature solidified near-infrared spectroscopy based on linear variable filter | |
| CN102520412A (en) | Laser active detecting device based on MEMS (micro-electromechanical system) two-dimensional scanning mirror array | |
| CN101308211B (en) | Laser differential scanning detection method and system | |
| CN103674488A (en) | Device for measuring divergence angle and light spot pattern of laser device | |
| CN207487813U (en) | A kind of sound and image acquiring device based on wireless laser technology | |
| CN202869779U (en) | Device for measuring divergence angle and light spot pattern of laser | |
| CN201583662U (en) | Laser radar for upper atmosphere Rayleigh scattering wind-temperature detection | |
| CN105137595A (en) | Laser beam scanning angle trigger device | |
| CN101936885B (en) | Optical fiber transceiver integrated air differential optical absorption spectroscopy (DOAS) measuring system | |
| CN206863362U (en) | A kind of windfinding radar optical launcher | |
| CN204043637U (en) | Micro-angle measurement unit | |
| CN101788674B (en) | High-altitude air Rayleigh scattering wind-warm probe laser radar | |
| CN100489470C (en) | Angular vibration laser interference measuring method and device | |
| CN103335987A (en) | Fourier spectrograph based on micro electro mechanical system | |
| CN102854330A (en) | Optical fiber transmission type acousto-optic modulation laser Doppler coherent detector | |
| CN203405499U (en) | A reflective all-fiber optical current transformer | |
| CN103134964B (en) | Electrostatic fiber optic measuring apparatus and measuring method | |
| CN202815006U (en) | Optical fiber transmission type acousto-optic modulation laser doppler coherent detecting instrument | |
| CN212321830U (en) | Laser radar for remote detection | |
| CN102221356A (en) | Device and method for measuring laser incident angle by sinusoidally modulating multi-beam laser heterodyne secondary harmonics with Doppler galvanometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 |