CN201503495U - Eye safety airport wind shear laser radar system device - Google Patents
Eye safety airport wind shear laser radar system device Download PDFInfo
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- CN201503495U CN201503495U CN2009201254777U CN200920125477U CN201503495U CN 201503495 U CN201503495 U CN 201503495U CN 2009201254777 U CN2009201254777 U CN 2009201254777U CN 200920125477 U CN200920125477 U CN 200920125477U CN 201503495 U CN201503495 U CN 201503495U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The utility model relates to an eye safety airport wind shear laser radar system device, consisting of four subsystems: a transmitting system, a transmitting and receiving optical system, a receiving system and a control system, wherein the transmitting system, the transmitting and receiving optical system and the receiving system are respectively arranged on an optical platform. A seed injection type diode is adopted for pumping an Nd:YAG laser, thus having high repeat frequency and large pulse energy, leading one-time radial wind speed measurement to have enough pulse accumulation number so as to achieve enough high signal-to-noise ratio, and meeting the accuracy requirement of wind speed measurement; after being frequency-tripled, the laser outputs 355nm laser which is in best wave band of eye safety, thus expanding the use environment of the system; and an adopted four-channel double F-P standard optical system with a direct receiving mode for detecting wind shear is simple and can continuously operate for 24 hours under an unattended condition.
Description
Technical field
The utility model is to belong to a kind of laser radar detection system, adopts the 355nm wavelength to eye-safe, utilizes the Doppler shift of two F-P etalons to survey the wind principle, surveys the laser radar system device of airport low.
Background technology
The low duration is short, and scope is little, is difficult to survey and forecast, is the meteorological problem of more scabrous aviation.China Civil Aviation Airport only has the part airport that Doppler's microwave weather radar has been installed, and can survey rainy day wind field situation; The low of no rainy day gas is because without any sign, and is bigger to the flight safety threat, but can't survey and forecast at present.And the laser acquisition low is proved to be the most effective.The optical quality that coherent detection technology requires is very high, and the Project Realization difficulty is also very big, and the environment wind field down that the coherent wind laser radar only is applicable to the boundary layer or has certain aerosol density is observed.
Eye safe airport wind shear laser radar system adopts direct detection mode, and 355nm is that best eye safety band is suitable for using under the condition of harm eye-safes such as airport, horizontal wind observation.This system adopts two F-P etalons of accurate design to have thermostat, adopt the piezoelectric ceramics of monitoring circuit control criterion tool to come adjustment criteria tool chamber length to guarantee the frequency of locked laser simultaneously, have higher time and spatial resolution, measuring accuracy height, spatial coverage is also big.The safe airport of eye wind shear laser radar system is taken off with landing for the airport reliable wind field observation data is provided, and has promoted civil aviaton's aerological sounding level and safe flight ability.
Summary of the invention
The purpose of this utility model is in order to improve and remedy the deficiency of China's airport wind field observation method, thereby provide the safe airport of a kind of eye wind shear laser radar system, Doppler shift based on two F-P etalons is surveyed the wind principle, adopts dual edge direct detection technology that the overhead tropospheric wind shear in airport is carried out real-time detection and early warning.
The safe airport of a kind of eye wind shear laser radar system device, it is made up of four subsystem assemblies, comprises emission coefficient, emission receiving optics, receiving system, control system; Emission coefficient, emission receiving optics, receiving system all are arranged on the optical table, between emission coefficient and the receiving system, all be connected between emission receiving optics and the receiving system, be connected by signal wire between control system and other system by optical fiber.
Emission wavelength adopts the Nd:YAG laser instrument of seed injection diode pumping, and the 355nm wavelength of exporting behind frequency tripling is in the eye-safe best band.
Emission coefficient is made up of a laser instrument and expansion bundle light-conducting system, and laser instrument adopts seed injection diode pumping Nd:YAG laser instrument.
The emission receiving optics is made up of telescopic system and d scanning system, d scanning system is installed in the shelter top, with two with level angle at 45 and be coated with the plane mirror of 355nm wavelength all-dielectric film, be installed in horizontal rotary mechanism respectively, can rotate 0-360 ° with vertical rotating mechanism, can rotate 0-180 ° and form the large-caliber optical periscopic structure, two rotating mechanisms are respectively by the transmission of turbine and worm gear train.
Telescopic system be located at the two-dimensional scan unit under, be Cassegrain's reflective structure, effectively clear aperture is 300mm, primary mirror is coated with 355nm wavelength reflectivity and reaches 99% deielectric-coating.
Receiving system is by collimating mirror, catoptron, spectroscope, beam splitter prism, focus lamp and two F-P etalon, two analog probers of optical filter, three photon counting detectors and an A/D capture card and two photon collection cards are formed, and all be positioned in the receiver combination, capture card then is installed in the PCI slot of industrial computer main frame.
The main body of control system is an industrial computer, by RS232 serial ports control two-dimensional scan controller, two F-P etalon controller and laser instrument, sequential circuit is used to trigger each detector, the photon counting card is installed in the PCI slot of industrial computer main frame, and these parts and laser power supply are installed in one 19
#On the standard cabinet.
Telescopical lens barrel focus place is equipped with the optical fiber receiving port, and the atmospheric backscatter echoed signal that telescope receives imports to receiving system by optical fiber.
Two F-P etalons adopt the four-way structure, are made up of two signalling channels and two reference lock passages.
The technical scheme that eye safe airport wind shear laser radar system device adopts is: adopt the Nd:YAG laser instrument of seed injection diode pumping, export 355nm behind frequency tripling, pulsed frequency is the laser beam of 1000Hz.This light beam is divided into two bundles, wherein beam of laser is the two-dimensional scan unit directive sky that the plane mirror group of miter angle, plating 355nm wavelength all-dielectric film is formed through beam expanding lens with horizontal direction, and this two-dimensional scan unit can be done and horizontally rotate and vertical rotation.The focus place of telescope lens barrel is equipped with the optical fiber receiving port, the atmospheric backscatter echoed signal that telescope receives imports to collimating mirror by optical fiber becomes directional light, behind the narrow band pass filter through the compacting bias light, by saturating inverse ratio is a certain proportion of beam splitting chip separated into two parts, reflected signal is surveyed as energy, transmission signal is that 50/50 beam splitter prism is divided into two-way light and enters two signalling channels of etalon respectively as acquisition of signal through a saturating inverse ratio of front surface, at this moment because transmitance different obtains two light signals that intensity does not wait, energy and signal are by three corresponding photon counting detectors receptions; Other a branch of light of telling from laser instrument imports to collimating mirror by optical fiber becomes directional light, through behind the narrow band pass filter, by saturating inverse ratio is a certain proportion of beam splitting chip separated into two parts, reflected signal is surveyed as energy, transmission signal then enters the frequency reference passage of etalon, and this two paths of signals is received by two corresponding analog probers.Be input in the corresponding numbered card after five detectors are converted to light signal electric signal respectively, by the industrial computer system control program data of gathering stored and handle at last, and show the wind direction and the wind speed distribution plan in time of shear wind in real time.
The safe airport of eye wind shear laser radar system mainly comprises four subsystems on the whole: emission coefficient, receiving system, emission receiving optics and control system.
In order to guarantee the optical stability of system, emission coefficient, receiving system, emission receiving optics all are placed on the optical table.Emission coefficient mainly comprises a laser instrument and expands the bundle light-conducting system, adopt the Nd:YAG laser instrument of seed injection diode pumping, the wavelength of output 355nm behind frequency tripling, be in the safest wave band of human eye, be suitable for spaceborne, airborne or ground based system, pulsed frequency is 1000Hz, can catch wind shear fast and improve detection accuracy.
The emission receiving optics mainly comprises telescopic system and d scanning system, d scanning system is installed in the shelter top, adopt two to be coated with the plane mirror of 355nm wavelength all-dielectric film, be installed in horizontal rotary mechanism (rotating 0 ° to 360 °) and vertical rotating mechanism (rotating 0 ° to 180 °) respectively and go up and form the large-caliber optical periscopic structure with level angle at 45.Two rotating mechanisms all adopt the Worm and worm-wheel gearing transmission, realize comprehensive quick scanning by software control.Receiving telescope adopts Cassegrain's reflective structure under the two-dimensional scan unit, effectively clear aperture is 300mm, and primary mirror is an aspheric mirror, and plating 355nm wavelength, reflectivity are 99% deielectric-coating.
Receiving system is the part of total system most critical: be made up of collimating mirror, optical filter, catoptron, spectroscope, beam splitter prism, focus lamp, two F-P etalon, two analog probers, three photon counting detectors, an A/D capture card and two photon collection cards.Detector has gate control function, and the signal after the focusing directly imports on the photosurface of detector, and corresponding capture card is installed in the PCI slot of industrial computer main frame.
The main body of control system is an industrial computer, and system's running control software is by RS232 serial ports control two-dimensional scan controller, two F-P etalon controller CS100 and laser instrument.Each parts and laser power supply thereof are installed in 19
#In the standard cabinet.
Transmit and receive between the system, be connected by optical fiber between emission receiving optics and the receiving system; Be connected by signal wire between control system and other system.Emission coefficient adopts the Nd:YAG laser instrument of seed injection diode pumping to export the wavelength of 355nm behind frequency tripling.
System adopts the nearly level in the elevation angle, and the quick scan mode that the position angle continuously changes shows the radially wind speed of each scanning probe with the PPI mode.The safe wind shear laser radar of eye is surveyed the wind principle:
This system core is to adopt high-resolution pair of F-P etalon, it is to form two groups of areas, the two pair etalons identical with size by plated film or depositional mode on a pair of substrate, thickness according to plated film can make two groups of passage frequency spectrum centers of etalon separate, and forms the overlapping of transmitance response curve.Because they are fixed on the substrate, it is identical that the relative position of the centre frequency of two groups of passages of two F-P etalons is changed by the drift of temperature, guarantees the frequency spectrum Center Gap constant magnitude of etalon.The shoot laser frequency is positioned at the place, point of crossing of two etalon frequency spectrums, because the motion of atmosphere wind action or atmospheric particles, gasoloid and molecular scattering echoed signal by the telescope reception, all produce Doppler shift with respect to the emission laser frequency, but the molecular scattering spectrum is a lot of with respect to Doppler shift and gasoloid spectrum width, in the dynamic range of measuring, can regard a kind of uniform ambient noise signal as, the gasoloid backscatter signal by etalon after output signal strength will be different, relatively the size between them just can obtain Doppler shift, thereby obtains radially wind speed.Both relations are:
In the formula, V is a wind speed radially, and λ is an optical maser wavelength, and Δ v is a Doppler shift.
The beneficial effects of the utility model are: the wind shear laser radar adopts quick scanning work mode, and Nd:YAG laser instrument repetition frequency height, the pulse energy of the pumping of seed injection diode are big, make single radially measuring wind speed enough pulse cumulative numbers are arranged to reach sufficiently high signal to noise ratio (S/N ratio), satisfied the requirement of system's measuring wind speed precision, can bear the American National Standard of illumination simultaneously according to the maximum of human eye, the laser of output 355nm is in the wave band of eye-safe the best behind the Nd:YAG laser instrument frequency tripling, has enlarged the environment for use of native system.
The safe airport of eye wind shear laser radar system adopts direct receive mode wind shear detection on the basis of two F-P etalon Doppler's principles survey wind, have simple optical system, can running continuously in 24 hours under the situation of unattended duty.
Description of drawings
The safe airport of Fig. 1 eye wind shear laser radar system structural representation;
Among the figure: the 1-emission coefficient, 1.1-laser instrument, 1.2-expand bundle light-conducting system device, 2-launches receiving optics, 2.1-telescopic system device, 2.2-d scanning system device, the 3-receiving system, 3.1-F-P etalon, 3.2-optical filter, 3.2b-optical filter, 3.3a-photon counting detector, 3.3b-photon counting detector, 3.3c-analog prober, 3.3d-photon counting detector, 3.3e-analog prober, the 4-control system, 4.1-industrial computer, 4.2-two-dimensional scan controller, 4.3-two F-P etalon controllers, 4.4-sequential circuit, 4.5-photon counting card, 4.6-laser power supply.
Embodiment
The safe airport of eye described in the utility model wind shear laser radar system device embodiments is described further its system architecture in conjunction with the accompanying drawings:
This system and device comprises four subsystem assemblies, emission coefficient 1, emission receiving optics 2, receiving system 3, control system 4 is formed, emission coefficient 1, receiving optics 2, receiving system 3 all is arranged on the optical table, to guarantee the optical stability of system, wherein, emission coefficient 1 mainly comprises a laser instrument 1.1 and expands bundle light-conducting system device 1.2, laser instrument 1.1 adopts the Nd:YAG laser instrument of seed injection diode pumping, guarantee the frequency stability of laser instrument, output 355nm wavelength behind frequency tripling, be in the safest wave band of human eye, be suitable for spaceborne, airborne or ground based system, pulsed frequency is 1kHz, can catch wind shear fast, improves detection accuracy.Emission receiving optics 2 mainly comprises telescopic system 2.1 and d scanning system 2.2, d scanning system 2.2 is installed in the shelter top, adopt two and level angle at 45, and be coated with the plane mirror of 355nm wavelength all-dielectric film, be installed in horizontal rotary mechanism (rotating 0 °-360 °) respectively and go up composition large-caliber optical periscopic structure with vertical rotating mechanism (rotating 0 °-180 °), two rotating mechanisms are respectively by the transmission of turbine and worm gear train, by software controlled or manually control, realize comprehensive quick scanning, receiving telescope system 2.1 be located at the two-dimensional scan unit under, adopt Cassegrain's reflective structure, effectively clear aperture is 300mm, primary mirror is coated with 355nm wavelength reflectivity and reaches 99% deielectric-coating, receiving system 3 is by collimating mirror, catoptron, spectroscope, beam splitter prism, focus lamp and two F-P etalon 3.1, optical filter 3.2a, 3.2b, two analog prober 3.3c, 3.3e, three photon counting detector 3.3d, 3.3a, 3.3b, an A/D capture card and two photon collection cards are formed, and all are positioned in the receiver combination.Detector has the distance of gate scalable detection range, signal after the focusing directly imports on the photosurface of detector, corresponding capture card is installed in the PCI slot of industrial computer main frame, the main body of control system 4 is a worker. control computer 4.1, by RS 232 serial ports control two-dimensional scan controller 4.2, two F-P etalon controller 4.3 and laser instrument, sequential circuit 4.4 is used to trigger each detector, photon counting card 4.5 is installed in the PCI slot of industrial computer main frame, and these parts and laser power supply 4.6 are installed in one 19
#On the standard cabinet.The lens barrel focus place of telescopic system 2.1 is equipped with the optical fiber receiving port, the atmospheric backscatter echoed signal that telescope 2.1 receives imports to receiving system by optical fiber, two signalling channels of two F-P etalons 3.3 are come the frequency of analyse atmos backscatter signal in receiving system 3, locking channel is then surveyed the emission laser frequency, makes etalon tracking lock emission laser frequency simultaneously.Between emission coefficient 1 and the receiving system 3, all be connected between emission receiving optics 2 and the receiving system 3, be connected by signal wire between control system 4 and other system by optical fiber.
Claims (9)
1. the safe airport of eye wind shear laser radar system device, it is characterized in that: it is made up of four subsystem assemblies, comprises emission coefficient (1), emission receiving optics (2), receiving system (3), control system (4); Emission coefficient (1), emission receiving optics (2), receiving system (3) all are arranged on the optical table, between emission coefficient (1) and the receiving system (3), all be connected between emission receiving optics (2) and the receiving system (3), be connected by signal wire between control system (4) and other system by optical fiber.
2. according to the safe airport of the eye wind shear laser radar system device of claim 1, it is characterized in that: emission wavelength adopts the Nd:YAG laser instrument of seed injection diode pumping, and the 355nm wavelength of exporting behind frequency tripling is in the eye-safe best band.
3. according to the eye safe airport wind shear laser radar system device of claim 1, it is characterized in that: emission coefficient (1) is made up of a laser instrument (1.1) and expansion bundle light-conducting system (1.2), and laser instrument (1.1) adopts seed injection diode pumping Nd:YAG laser instrument.
4. according to the eye safe airport wind shear laser radar system device of claim 1, it is characterized in that: emission receiving optics (2) is made up of telescopic system (2.1) and d scanning system (2.2), d scanning system (2.2) is installed in the shelter top, with two with level angle at 45 and be coated with the plane mirror of 355nm wavelength all-dielectric film, be installed in horizontal rotary mechanism respectively, can rotate 0-360 ° with vertical rotating mechanism, can rotate 0-180 ° and form the large-caliber optical periscopic structure, two rotating mechanisms are respectively by the transmission of turbine and worm gear train.
5. according to the eye safe airport wind shear laser radar system device of claim 4, it is characterized in that: telescopic system (2.1) be located at the two-dimensional scan unit under, it is Cassegrain's reflective structure, effectively clear aperture is 300mm, and primary mirror is coated with 355nm wavelength reflectivity and reaches 99% deielectric-coating.
6. according to the eye safe airport wind shear laser radar system device of claim 1, it is characterized in that: receiving system (3) is by collimating mirror, catoptron, spectroscope, beam splitter prism, focus lamp and two F-P etalon (3.1), optical filter (3.2a), (3.2b), two analog probers (3.3c), (3.3e), three photon counting detectors (3.3a), (3.3b), (3.3d) and an A/D capture card and two photon collection cards are formed, and all be positioned in the receiver combination, capture card then is installed in the PCI slot of industrial computer main frame.
7. according to the eye safe airport wind shear laser radar system device of claim 1, it is characterized in that: the main body of control system (4) is an industrial computer (4.1), by the control of RS232 serial ports two-dimensional scan controller (4.2), two F-P etalon controllers (4.3) and laser instrument, sequential circuit (4.4) is used to trigger each detector, photon counting card (4.5) is installed in the PCI slot of industrial computer main frame, and these parts and laser power supply (4.6) are installed in one 19
#On the standard cabinet.
8. according to the eye safe airport wind shear laser radar system device of claim 4, it is characterized in that: the lens barrel focus place of telescope (2.1) is equipped with the optical fiber receiving port, and the atmospheric backscatter echoed signal that telescope (2.1) receives imports to receiving system by optical fiber.
9. according to the safe airport of the eye wind shear laser radar system device of claim 1, it is characterized in that: two F-P etalons (3.1) adopt the four-way structure, are made up of two signalling channels and two reference lock passages.
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| CN2009201254777U CN201503495U (en) | 2009-06-23 | 2009-06-23 | Eye safety airport wind shear laser radar system device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950017A (en) * | 2010-08-13 | 2011-01-19 | 中国民航大学 | Emulation method of high fidelity onboard foresight weather radar low-altitude wind shear signal |
| CN102279391A (en) * | 2011-06-21 | 2011-12-14 | 中国科学技术大学 | Doppler wind-measuring laser radar system |
| CN102508222A (en) * | 2011-11-18 | 2012-06-20 | 中国科学技术大学 | Middle and upper atmospheric wind field retrieval method |
| CN103576134A (en) * | 2013-11-26 | 2014-02-12 | 北京航空航天大学 | Full-waveform laser radar system based on coaxial two-channel data acquisition |
| CN103744087A (en) * | 2014-01-11 | 2014-04-23 | 桂林理工大学 | Pulse type N*N-array laser radar system |
| CN106093911A (en) * | 2016-07-25 | 2016-11-09 | 北京理工大学 | A kind of dot matrix emitting-receiving system for Non-scanning mode laser imaging |
| CN107037446A (en) * | 2016-07-07 | 2017-08-11 | 无锡中科光电技术有限公司 | A kind of Atmospheric particulates are walked to navigate observation laser radar device |
| CN109324335A (en) * | 2018-12-17 | 2019-02-12 | 北京无线电测量研究所 | A kind of method and system based on laser radar identification wind shear |
| CN112230217A (en) * | 2020-09-10 | 2021-01-15 | 成都多普勒科技有限公司 | A integrative radar sensor of miniature photoelectricity for intelligent automobile |
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2009
- 2009-06-23 CN CN2009201254777U patent/CN201503495U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950017A (en) * | 2010-08-13 | 2011-01-19 | 中国民航大学 | Emulation method of high fidelity onboard foresight weather radar low-altitude wind shear signal |
| CN101950017B (en) * | 2010-08-13 | 2012-10-24 | 中国民航大学 | Emulation method of high fidelity onboard foresight weather radar low-altitude wind shear signal |
| CN102279391A (en) * | 2011-06-21 | 2011-12-14 | 中国科学技术大学 | Doppler wind-measuring laser radar system |
| CN102508222A (en) * | 2011-11-18 | 2012-06-20 | 中国科学技术大学 | Middle and upper atmospheric wind field retrieval method |
| CN102508222B (en) * | 2011-11-18 | 2013-10-16 | 中国科学技术大学 | Middle and upper atmospheric wind field retrieval method |
| CN103576134A (en) * | 2013-11-26 | 2014-02-12 | 北京航空航天大学 | Full-waveform laser radar system based on coaxial two-channel data acquisition |
| CN103744087A (en) * | 2014-01-11 | 2014-04-23 | 桂林理工大学 | Pulse type N*N-array laser radar system |
| CN103744087B (en) * | 2014-01-11 | 2016-03-02 | 桂林理工大学 | A kind of pulse type N*N-array laser radar system |
| CN107037446A (en) * | 2016-07-07 | 2017-08-11 | 无锡中科光电技术有限公司 | A kind of Atmospheric particulates are walked to navigate observation laser radar device |
| CN106093911A (en) * | 2016-07-25 | 2016-11-09 | 北京理工大学 | A kind of dot matrix emitting-receiving system for Non-scanning mode laser imaging |
| CN109324335A (en) * | 2018-12-17 | 2019-02-12 | 北京无线电测量研究所 | A kind of method and system based on laser radar identification wind shear |
| CN109324335B (en) * | 2018-12-17 | 2023-10-31 | 北京无线电测量研究所 | Method and system for identifying wind shear based on laser radar |
| CN112230217A (en) * | 2020-09-10 | 2021-01-15 | 成都多普勒科技有限公司 | A integrative radar sensor of miniature photoelectricity for intelligent automobile |
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