CN202631735U - Full-altitude laser radar for detecting wind field, temperature and density of atmosphere - Google Patents
Full-altitude laser radar for detecting wind field, temperature and density of atmosphere Download PDFInfo
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- CN202631735U CN202631735U CN2012202566778U CN201220256677U CN202631735U CN 202631735 U CN202631735 U CN 202631735U CN 2012202566778 U CN2012202566778 U CN 2012202566778U CN 201220256677 U CN201220256677 U CN 201220256677U CN 202631735 U CN202631735 U CN 202631735U
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Abstract
The utility model discloses a full-altitude laser radar for detecting the wind field, temperature and density of atmosphere. The laser radar consists of a laser emitting unit (1), an optical receiving unit (2) and a signal detection unit (3). The full-altitude laser radar for detecting the wind field, temperature and density of the atmosphere is formed through the organic combination of secondary frequency-doubled residual light multiplexing, dual-fiber focal plane light splitting, three-direction laser beam switching, three-direction fiber switching, time sequence controlling and a data inversion and fusion technology. The full-altitude laser radar has the advantage that the simultaneous detection on multiple parameters, such as the wind field, the temperature and the density, of the atmosphere in an altitude range from the near-ground to the altitude of 110 km can be realized. The full-altitude laser radar has the advantages of scientific technical scheme, high degree of system integration, high degree of automation, reliability in work, convenience in use and the like, and a high-performance detection means for middle-upper atmospheric research and middle-upper atmospheric environment monitoring is provided.
Description
Technical field
The utility model relates to laser radar, relates in particular to atmospheric wind, temperature and density while detecting laser radar near the ground to 110 kilometers overall height journey scopes.
Background technology
To 110 kilometers atmosphere intervals, is the important step in the sun and earth relationship chain near the ground, also is the key areas of atmospheric science and space environment research.Laser radar since its have spatial and temporal resolution height, detection sensitivity high, do not have distinct advantages such as atmospheric exploration blind area, become the indispensable means of this interval atmospheric exploration.Measure in the time of overall height journey atmospheric wind, temperature, density; Not only has extremely important scientific value at aspects such as understanding earth atmosphere dynamics, photochemistry and Global climate change in depth; Simultaneously, satellites transmits and recovery, space environment forecast etc. had extremely important using value.
The anemometry laser radar that utilizes iodine molecule (or F-P etalon) Doppler frequency to differentiate; Survey (G.Baumgarten when having realized to 20 ~ 80km atmospheric wind and temperature; Et.al. Doppler Rayleigh/ Mie/Raman lidar for wind and temperature measurements in the middle atmosphere up to 80km, Atmos. Meas. Tech., 3; 1509 ~ 1518; 2010. Chiao-Yao She, Direct-detection Doppler wind measurements with a Cabannes – Mie lidar:A. Comparison between iodine vapor filter and Fabry Perot interferometer methods, Applied Optics; 46 (20): 4434 ~ 4443,2007).
Utilize the high resolving power sodium layer wind-warm syndrome laser radar of pulsed dye amplification and three frequency acoustooptic modulations, survey (Kam S.Arnold, C.Y.She when having realized 80 ~ 110km high-altitude sodium layer wind field and temperature; Metal fluorescence lidar and the middle atmosphere; Contemporary Physics, 2003,44 (1): 35 ~ 49; Chiao-Yao She; Et al. Simultaneous three frequency Na lidar measurements of radial wind and temperature in the mesopause region, Geophys. Res. Lett., 21 (17): 1771 ~ 1774; 1994. Hu Xiong; Et al. Sodium fluorescence Doppler lidar to measure atmospheric temperature in the mesopause region. Chinese Sci Bull, 56:417 ~ 423,2011).
Utilize the laser radar of Raman scattering, Rayleigh scattering and resonance fluorescence to join together respectively with three; Realized 1 ~ 105 kilometer nocturnal temperature detection (Temperature lidar measurements from 1 to 105 km altitude using resonance; Rayleigh; And Rotational Raman scattering, Atmos. Chem. Phys. 4:793 ~ 800,2004; Lidar temperature measurements of gravity waves over K ü hlungsborn from 1 to 105 km:A winter-summer comparison; Journal of Geophysical Research; 111 (D24108), 2006).
Utilize round-the-clock, the overall height atmospheric sounding and observing laser radar of twice gordian technique such as the surplus recovery usefulness of frequency multiplication, the beam split of two optical fiber focal plane and atom filter; Realization is surveyed simultaneously with 80 ~ 110km sodium layer density round-the-clock from 3 ~ 110km atmospheric density and is surveyed (round-the-clock, overall height atmospheric sounding and observing laser radar, the novel patent No. 200920083967.5; The double wave length liquid altitude deection laser radar technology, Chinese laser, 33 (5): 601 ~ 606,2006).
But up to the present, Shang Weijian realizes overall height journey wind field, temperature, the density report of detecting laser radar simultaneously about the separate unit laser radar.
If utilizing above-mentioned many laser radar apparatus simply to be stacked to realize together overall height journey wind field, temperature, density surveys simultaneously; The simple combination mode of this multi-laser, many telescopes, many capture cards; Can cause system complex on the one hand, involve great expense, maintenance cost is high; On the other hand, also can make the overall height number of passes produce extra error, thereby reduce system's detection accuracy and reliability owing to the consistance and the stability problem of many laser radar apparatus according to inversion accuracy.
The utility model content
The purpose of the utility model is: provide a kind of overall height journey atmosphere wind-warm syndrome secret agent to survey laser radar.This laser radar is through using for reference three frequency sodium layer wind-warm syndrome laser radars, iodine molecule (or etalon) Doppler's frequency discrimination anemometry laser radar and gordian techniquies such as round-the-clock, overall height atmospheric sounding and observing laser radar; Effectively incorporate the surplus recovery usefulness technology of frequency multiplication, three direction laser beam handoff techniques, three direction optical fiber handoff techniques, sequential automatic control technology and data inversion integration technology again twice; Realized that the separate unit laser radar surveys to 110km overall height journey atmospheric wind, temperature, density the time near the ground; Thereby further strengthened the detectivity of separate unit laser radar, surveyed a kind of more efficiently equipment that provides for the atmosphere many reference amounts are connective simultaneously.
To achieve these goals, the utility model adopts following technical scheme:
A kind of overall height journey atmosphere wind-warm syndrome secret agent surveys laser radar and is made up of laser emission element, optics receiving element, detecting signal unit.
Laser emission element is made up of continuous light laser instrument, acousto-optic modulator, pulsed dye amplifier, first right-angle prism, the one or three direction laser beam switch, Nd:YAG laser instrument, varactor doubler, double-colored high light beam splitter, light absorber, second right-angle prism and the two or three direction laser beam switch.Because it is big from the spatial dimension to 110km atmosphere interval near the ground; Survey when adopting Rayleigh scattering mechanism or resonance fluorescence mechanism form can't realize the overall height journey separately; Must adopt 532 nm laser (Rayleigh scattering mechanism) and 589 nm sodium (or 770 nm potassium) laser (resonance fluorescence mechanism) to launch simultaneously, excite with echoed signal when could realize the many reference amounts of overall height journey and obtain.The utility model adopts a branch of 532 nm laser beam to be used to excite low-to-medium altitude atmospheric molecule Rayleigh scattering and Doppler shift, obtains wind field, temperature and density near the ground to the 80km atmosphere simultaneously; Another restraints dopplerbroadening and frequency displacement that 589 nm laser beam are used to excite high-altitude sodium layer atom, obtains wind field, temperature and the density of 80 ~ 110km interval.The Nd:YAG laser instrument adopts Nd:YAG laser instrument (the Iodine filter based mobile Doppler lidar to make continuous and full azimuth scanned wind measurements:data acquisition and analysis system of seed injection locking on the iodine molecule absorption line; Data retrieval methods; And error analysis; APPLIED OPTICS; 2010,49 (36): 6960 ~ 6978), satisfy the requirement that iodine molecule (or etalon) Doppler frequency is differentiated with the 532 nm optical maser wavelengths that guarantee this laser instrument output.The 532 nm laser that frequency multiplier comes out in the Nd:YAG laser chamber are launched behind right-angle prism and three direction laser beam switchs, are used to excite low-to-medium altitude atmospheric molecule Rayleigh scattering information.(sodium atom D2 line does not have the measurement of Doppler's saturated fluorescence spectrum to 589 nm laser of single mode ring cavity continuous light laser instrument output; The optics journal; 2010,30 (4), 1036 ~ 1040) behind three frequency acousto-optic modulators, get into the pulsed dye amplifier as seed light source; The pump light of pulsed dye amplifier obtains second bundle, 532 nm laser by the remaining 1064 nm laser of Nd:YAG laser instrument through varactor doubler; The 589 nm pulse lasers that the pulsed dye amplifier comes out are launched behind right-angle prism and three direction laser beam switchs, are used to excite high-altitude sodium layer atom.
In the optics receiving element; Because Doppler's wind field measuring principle limits the line of vision wind field that it can only obtain to be parallel to the receiving telescope optical axis direction, wants to realize the vector wind field measurement, must adopt at least two receiving telescopes; The projection quadrature of these two telescopes on surface level placed; And being the θ angle with vertical direction, the θ angle can be finally inversed by the trivector wind field information of atmosphere through data processing between 15 ~ 45 degree.The utility model adopts three telescopes, and the projection quadrature of two telescopes on surface level placed, and is identical angle theta with vertical direction, and the atmospheric wind measurement is realized in the θ angle between 15 ~ 45 degree; Another telescope is vertically placed, and not only can directly obtain vertically atmospheric temperature, the density of (zenith) direction, and vertical direction wind speed also capable of using is that zero this characteristic is calibrated two oblique wind fields, further improves the wind field detection accuracy.2 optical fiber are placed in every telescope focal plane, adopt two optical fiber focal plane light splitting technologies, receive the echo light of 532nm and two kinds of wavelength of 589nm respectively, thereby receive and detection when realizing overall height journey wind field, temperature, density.
532 nm and the 589 nm laser beam of laser emission element emission are launched to 3 directions by three direction laser beam switch timesharing, and transmit direction is parallel to the reception visual field optical axis of three receiving telescopes of optics receiving element successively.
In detecting signal unit, the 532 nm echo light that received by three direction fibre-switch are gone into photodetector through Doppler's frequency discriminator is laggard, convert light signal to electric signal and send into data collecting card; Get into another photodetector behind the 589 nm echo light process sodium atom light filter by another three directions fibre-switch reception, convert light signal to electric signal and send into another data collecting card, this two paths of data capture card is by computer control and data access.The computer control time schedule controller; Make time schedule controller control the synchronous of Laser emission, signals collecting etc. on the one hand; Control three direction laser beam switchs on the other hand and three direction fibre-switch are switched synchronously; Aim at same direction to guarantee to transmit and receive, realize that three direction timesharing transmit and receive.In the data processing of overall height journey atmospheric temperature, wind field; Also need adopt the data inversion integration technology; Utilize the higher sodium layer temperature low side of precision (~ 80km) give the relatively low high-end initial reference temperature of Rayleigh temperature of precision, so that improve the inversion accuracy of middle atmosphere temperature; In wind field is surveyed; Sodium layer wind field low side and Rayleigh wind field are high-end all to be existed than mistake, adopts The weighted average technology equally also can improve the detection accuracy of wind field, utilizes rayleigh density and laser linewidth; Can demarcate sodium layer density, effectively improve overall height journey atmosphere many reference amounts detection accuracy.
Advantage of the utility model and effect:
A kind of overall height journey atmosphere wind-warm syndrome secret agent surveys laser radar and has realized that the separate unit laser radar surveys from the overall height journey to 110km overall height journey atmospheric wind, temperature, density near the ground simultaneously.This laser radar advantages such as scheme advanced person, level of integrated system height, reliable operation, working service are convenient that possess skills.Particularly; Through adopting the surplus recovery of secondary frequency multiplication organically blending with technology, two optical fiber focal plane light splitting technologies; Realize that a cover laser radar system transmits and receives 532 nm and 589 nm, two bundle narrow linewidth pulse lasers simultaneously; Survey when having guaranteed overall height journey wind field, temperature, density, and saved the buying and the maintenance cost of large-scale precision expensive components such as high power laser, telescope; Through adopting three direction optical fiber handoff techniques, can effectively improve system in the make progress consistance of detection system of three parts, reduce systematic error, improve detection accuracy; Through adopting three direction laser beam handoff techniques, single pulse energy improves 3 times than beam split mode, can effectively improve the signal to noise ratio (S/N ratio) of system; Time schedule controller is responsible for controlling the synchronous detection and the storage of dual-wavelength laser emission and three direction echoed signals, has guaranteed that the overall height journey receives and dispatches consistent on time and space; Through adopting the data inversion integration technology; Improve overall height journey wind field, temperature retrieval precision greatly; For atmospheric seeing on the middle and senior level research provides a kind of high-performance detecting devices, also a kind of effective new tool is provided for the detection of near space atmospheric environment and space weather monitoring and prediction.
Description of drawings
Fig. 1 surveys the structural representation of laser radar for a kind of overall height journey atmosphere wind-warm syndrome secret agent.
Wherein: 1 laser emission element, 101 continuous light laser instruments, 102 acousto-optic modulators, 103 pulsed dye amplifiers, 104 first right-angle prisms, 105 the 1 direction laser beam switchs, 106 varactor doublers, 107 double-colored high light beam splitters, 108 light absorbers, 111 Nd:YAG laser instruments, 112 second right-angle prisms, 113 the 23 direction laser beam switchs;
2 optics receiving elements, 210 first telescopes, 220 second telescopes, 230 the 3rd telescopes, 211 the 1 nm optical fiber, 212 the 1 nm optical fiber, 221 the 2 589 nm optical fiber, 222 the 2 532 nm optical fiber, 231 the 3 589 nm optical fiber, 232 the 3 532 nm optical fiber, 241 the 1 direction fibre-switch, 242 the 23 direction fibre-switch;
3 detecting signal units, 301 atomic light filters, 302 first photodetectors, 303 first capture cards, 311 Doppler's frequency discriminators, 312 second photodetectors, 313 second capture cards, 304 computing machines and 305 time schedule controllers.
Fig. 2 is the structural representation of three direction laser beam switchs.
Wherein: stop, 431 the 6th right-angle prisms, 432 the 7th right-angle prisms, 433 the 3rd bi-axial tilt platforms, 434 right limit devices in 401 motorized precision translation stage controllers, 402 outer case, 403 internal box, 404 translation guide rails, 405 drive units, 411 the 3rd right-angle prisms, 412 the 4th right-angle prisms, 413 first bi-axial tilt platforms, 414 left limit devices, 421 the 5th right-angle prisms, the 422 second bi-axial tilt platforms, 423.
Fig. 3 is the structural representation of three direction fibre-switch.
Wherein: stop, 531 the 9th right-angle prisms, 532 the 3rd collimating mirrors, 533 second right limit devices in 501 second motorized precision translation stage controllers, 502 second outer case, 503 second internal box, 504 second translation guide rails, 505 second drive units, 511 the 8th right-angle prisms, 512 first collimating mirrors, 513 second left limit devices, 521 second collimating mirrors, 522 second.
Embodiment
Embodiment 1
A kind of overall height journey atmosphere wind-warm syndrome secret agent surveys laser radar and is made up of laser emission element 1, optics receiving element 2, detecting signal unit 3;
Laser emission element 1 is made up of continuous light laser instrument 101, acousto-optic modulator 102, pulsed dye amplifier 103, first right-angle prism the 104, the 1 direction laser beam switch 105, varactor doubler 106, double-colored high light beam splitter 107, light absorber 108, Nd:YAG laser instrument 111, second right-angle prism 112 and the two or three direction laser beam switch 113; The coaxial successively placement of continuous light laser instrument 101, acousto-optic modulator 102 and pulsed dye amplifier 103, a right angle face of first right-angle prism 104 is vertical with this axle, the light inlet of another right angle face the one or three direction laser beam switch 105; The light-emitting window of Nd:YAG laser instrument 111 outputs 532 nm laser is aimed at a right angle face of second right-angle prism 112, the light inlet of another right angle face the two or three direction laser beam switch 113 of second right-angle prism 112; The coaxial successively placement of light-emitting window, varactor doubler 106 and light absorber 108 of Nd:YAG laser instrument 111 outputs 1064 nm laser; Between varactor doubler 106 and light absorber 108, place and the double-colored high light beam splitter 107 that should axially become miter angle, the reflection direction of double-colored high light beam splitter 107 is aimed at the pump light light inlet of pulsed dye amplifier 103;
The one or three direction laser beam switch 105 is identical with the structure of the two or three direction laser beam switch 113, and three direction laser beam switchs are made up of motorized precision translation stage controller 401, outer case 402, internal box 403, translation guide rail 404, drive unit 405, five 414,423,434 and three bi-axial tilt platforms 413,422,433 of 411,412,421,431,432, three stops of right-angle prism; The center of the front and back panel of outer case 402 and left and right sides panel is equipped with circular hole; The circular hole of front panel is a light inlet; Panel inboard, the left and right sides and rear panel inboard are settled left limit device 414, right limit device 434 and middle stop 423 respectively, and the bottom surface of outer case 402 is embedded with the translation guide rail 404 of left and right directions motion; Drive unit 405 is settled in internal box 403 bottoms, and drive unit 405 is placed on the translation guide rail 404; Internal box 403 is made up of left and right sides panel, rear panel and bottom panel; The center of left and right sides panel and rear panel is equipped with circular hole; Internal box 403 left and right sides panels are coaxial with the circular hole center of circle of outer case 402 left and right sides panels; The circular hole place of internal box 403 left and right sides panels settles the 3rd right-angle prism 411 and the 6th right-angle prism 431 respectively, and these two right-angle prisms are at a distance of 60 mm ~ 100 mm; Three bi-axial tilt platforms 413,422,433 are placed in the outside at outer case 402 left and right sides panels and rear panel circular hole place respectively, respectively settle a right-angle prism 412,421,432 on three bi-axial tilt platforms 413,422,433;
When drive unit 405 when translation guide rail 404 is moved to the left; Internal box 403 touches left limit device 414 to be stopped; At this moment, the center of the centrally aligned outer case 402 front panel circular holes of the 6th right-angle prism 431 is from laser beam warp the 6th right-angle prism 431 reflections of light inlet vertical incidence; Reflected light just in time vertically passes from internal box 403 right panel circular holes and outer case 402 right panel circular holes, again through 432 emissions of the 7th right-angle prism;
When drive unit 405 when translation guide rail 404 moves right; Stop 423 stopped during internal box 403 touched; At this moment; The center of outer case 402 front and back panel circular holes and internal box 403 rear panel circular holes vertically passes through internal box 403 rear panel circular holes and outer case 402 rear panel circular holes from the laser beam of light inlet vertical incidence in a straight line, again through 421 emissions of the 5th right-angle prism;
When drive unit 405 when translation guide rail 404 continues to move right; Internal box 403 touches right limit device 434 and stops; At this moment, the center of the centrally aligned outer case 402 front panel circular holes of the 3rd right-angle prism 411, the laser beam of light inlet vertical incidence is through 411 reflections of the 3rd right-angle prism; Reflected light just in time vertically passes from internal box 403 left panel circular holes and outer case 402 left panel circular holes, again through 412 emissions of the 4th right-angle prism;
589 nm laser beam of the 4th right-angle prism 412 reflections are parallel with the optical axis of first telescope, 210 reception visual fields in the one or the three direction laser beam switch 105, and 532 nm laser beam of the 4th right-angle prism 412 reflections depart from optical axis direction 1.5 ~ 15 milliradians of first telescope, 210 reception visual fields in the two or the three direction laser beam switch 113; 589 nm laser beam of the 5th right-angle prism 421 reflections are parallel with the optical axis of second telescope, 220 reception visual fields in the one or the three direction laser beam switch 105, and 532 nm laser beam of the 5th right-angle prism 421 reflections depart from optical axis direction 1.5 ~ 15 milliradians of second telescope, 220 reception visual fields in the two or the three direction laser beam switch 113; 589 nm laser beam of the 7th right-angle prism 432 reflections are parallel with the optical axis of the 3rd telescope 230 reception visual fields in the one or the three direction laser beam switch 105, and 532 nm laser beam of the 7th right-angle prism 432 reflections depart from optical axis direction 1.5 ~ 15 milliradians of the 3rd telescope 230 reception visual fields in the two or the three direction laser beam switch 113;
Optics receiving element 2 is by three telescopes 210,220,230, and 211,212,221,222,231,232 and two three direction fibre-switch of six roots of sensation optical fiber 241,242 are formed; The reception visual field optical axis of second telescope 220 is a vertical direction; The optical axis of the optical axis of first telescope, 210 reception visual fields and the 3rd telescope 230 reception visual fields on surface level the projection quadrature and have identical angle theta, 15 ° of < < 45 ° of θ with second telescope, 220 optical axises; The light inlet of the one 589 nm optical fiber 211 and the one 532 nm optical fiber 212 is side by side at a distance of 3 ~ 30 millimeters placements; The light inlet end face of two optical fiber all is positioned at the place, focal plane of first telescope 210, and the light inlet optical axis of two optical fiber is all parallel with the optical axis of first telescope, 210 reception visual fields; The light inlet of the 2 589 nm optical fiber 221 and the 2 532 nm optical fiber 222 is side by side at a distance of 3 ~ 30 millimeters placements; The light inlet end face of two optical fiber all is positioned at the place, focal plane of second telescope 220, and the light inlet optical axis of two optical fiber is all parallel with the optical axis of second telescope, 220 reception visual fields; The light inlet of the 3 589 nm optical fiber 231 and the 3 532 nm optical fiber 232 is side by side at a distance of 3 ~ 30 millimeters placements; The light inlet end face of two optical fiber all is positioned at the place, focal plane of the 3rd telescope 230, and the light inlet optical axis of two optical fiber is all parallel with the optical axis of the 3rd telescope 230 reception visual fields;
The one or three direction fibre-switch 241 is identical with the structure of the two or three direction fibre-switch 242, and three direction fibre-switch are made up of the second motorized precision translation stage controller 501, second outer case 502, second internal box 503, the second translation guide rail 504, second drive unit 505, two 513,522,533 and three collimating mirrors 512,521,532 of 511,531, three stops of right-angle prism; The center of the front and back panel of second outer case 502 and left and right sides panel is equipped with circular hole; The circular hole of front panel is a light-emitting window; Panel inboard, the left and right sides and rear panel inboard settle the bottom surface of stop 522 and the second right limit device, 533, the second outer case 502 in the second left limit device 513, second to be embedded with the second translation guide rail 504 of left and right directions respectively; Second internal box, 503 bottoms settle second drive unit, 505, the second drive units 505 to be placed on the second translation guide rail 504; Second internal box 503 is made up of left and right sides panel, rear panel and bottom panel; The center of second internal box, 503 rear panels and left and right sides panel is equipped with circular hole; Second outer case, 502 left and right sides panels are coaxial with the circular hole center of circle of second internal box, 503 left and right sides panels; The circular hole place of second internal box, 503 left and right sides panels settles the 8th right- angle prism 511 and 531, two right-angle prisms of the 9th right-angle prism 511,531 to be separately fixed on the base plate of second internal box 503 at a distance of 60 mm ~ 100 mm respectively; Second outer case, 502 left panels, rear panel and right panel circular hole place settle a collimating mirror respectively; The optical axis of first collimating mirror 512 and the 3rd collimating mirror 532 is coaxial with the circular hole center of circle of second outer case, 502 left and right sides panels, and the optical axis of second collimating mirror 521 is coaxial with the circular hole center of circle of second outer case, 502 front and back panels;
The bright dipping end end face of the one 589 nm optical fiber 211 is positioned at the place, first collimating mirror, 512 focal planes of the one or three direction fibre-switch 241, the light shaft coaxle of the bright dipping end optical axis of this optical fiber and first collimating mirror 512 of the one or three direction fibre-switch 241; The bright dipping end end face of the 2 589 nm optical fiber 221 is positioned at the place, second collimating mirror, 521 focal planes of the one or three direction fibre-switch 241, the light shaft coaxle of the bright dipping end optical axis of this optical fiber and second collimating mirror 521 of the one or three direction fibre-switch 241; The bright dipping end end face of the 3 589 nm optical fiber 231 is positioned at the place, the 3rd collimating mirror 532 focal planes of the one or three direction fibre-switch 241, the light shaft coaxle of the bright dipping end optical axis of this optical fiber and the 3rd collimating mirror 532 of the one or three direction fibre-switch 241;
The bright dipping end end face of the one 532 nm optical fiber 212 is positioned at the place, first collimating mirror, 512 focal planes of the two or three direction fibre-switch 242, the light shaft coaxle of the bright dipping end optical axis of this optical fiber and first collimating mirror 512 of the two or three direction fibre-switch 242; The bright dipping end end face of the 2 532 nm optical fiber 222 is positioned at the place, second collimating mirror, 521 focal planes of the two or three direction fibre-switch 242, the light shaft coaxle of the bright dipping end optical axis of this optical fiber and second collimating mirror 521 of the two or three direction fibre-switch 242; The bright dipping end end face of the 3 532 nm optical fiber 232 is positioned at the place, the 3rd collimating mirror 532 focal planes of the two or three direction fibre-switch 242, the light shaft coaxle of the bright dipping end optical axis of this optical fiber and the 3rd collimating mirror 532 of the two or three direction fibre-switch 242;
When second drive unit 505 is moved to the left along the second translation guide rail 504; Second internal box 503 touches the second left limit device 513 to be stopped; At this moment, the center of the centrally aligned second outer case 502 front panel circular holes of the 9th right-angle prism 531, light beam gets into three direction fibre-switch through the 3rd collimating mirror 532; Through 531 reflections of the 9th right-angle prism, reflected light just in time vertically passes from the light-emitting window of second outer case, 502 front panels;
When second drive unit 505 moves right along the second translation guide rail 504; Second internal box 503 touches that stop 522 stops in second; At this moment; Second outer case, 502 front and back panel circular holes and second internal box, 503 rear panel circular hole centers in a straight line, light beam gets into three direction fibre-switch through second collimating mirror 521, directly the light-emitting window through second internal box, 503 rear panel circular holes and second outer case, 502 front panels vertically passes;
When 505 continuation of second drive unit move right along the second translation guide rail 504; Second internal box 503 touches the second right limit device 533 and stops; At this moment, the center of the centrally aligned second outer case 502 front panel circular holes of the 8th right-angle prism 511, light beam gets into three direction fibre-switch through first collimating mirror 512; Through 511 reflections of the 8th right-angle prism, reflected light just in time vertically passes from the light-emitting window of second outer case, 502 front panels;
Detecting signal unit 3 is made up of atomic light filter 301, first photodetector 302, first capture card 303, Doppler's frequency discriminator 311, second photodetector 312, second capture card 313, computing machine 304 and time schedule controller 305; The optical axis of atomic light filter 301 is coaxial with second outer case, the 502 front and back panel circular hole centers of the one or three direction fibre-switch 241 of optics receiving element 2; The light-sensitive surface of first photodetector 302 is aimed at the light-emitting window of atomic light filter 301; The output terminal of first photodetector 302 is connected with first capture card, 303 input ends, and first capture card, 303 signal output parts are connected with computing machine 304; The optical axis of Doppler's frequency discriminator 311 is coaxial with second outer case, the 502 front and back panel circular hole centers of the two or three direction fibre-switch 242 of optics receiving element 2; The light-sensitive surface of second photodetector 312 is aimed at the light-emitting window of Doppler's frequency discriminator 311; The output terminal of second photodetector 312 is connected with second capture card, 313 input ends, and second capture card, 313 signal output parts are connected with computing machine 304; Computing machine 304 is connected with time schedule controller 305 input ends;
Doppler's frequency discriminator 311 can adopt iodine molecule frequency discriminator, dual edge etalon, single edges etalon or atom frequency discriminator in the above-mentioned detecting signal unit 3.
The workflow that a kind of overall height journey atmosphere wind-warm syndrome secret agent surveys laser radar is:
Nd:YAG laser instrument 111 outputs 532 nm single mode pulse lasers get into the two or three direction laser beam switch 113 in the laser emission element 1 behind second right-angle prism 112; Timesharing excites the Rayleigh scattering and the Doppler shift information of atmospheric molecule by direction ground emission 532 nm laser beam.The echo light timesharing of three directions is received by telescope in the optics receiving element 2 210,220,230 respectively; And focus on 532 nm optical fiber light inlet ports on the focal plane separately respectively; Get into the two or three direction fibre-switch 242 through 212,222,232 conduction of 532 nm optical fiber again; Synchronously the echo light of three directions is sent into Doppler's frequency discriminator 311, after second photodetector 312 carried out the photosignal conversion, its electric signal was gathered by second capture card 313 again; Last echo optical information obtains atmospheric wind, temperature, density information by computing machine 304 storages and processing.
Continuous light laser instrument 101 produces the continuous seed laser of 589 nm single modes in the laser emission element 1; After acousto-optic modulator 102 frequency conversions, get into pulsed dye amplifier 103; The required 532 nm pump lights of pulsed dye amplifier 103 are by Nd:YAG laser instrument 111 remaining 1064 nm laser after two frequencys multiplication first; Through after double-colored high light beam splitter 107 reflections, obtaining again behind the varactor doubler 106; 589 nm single mode pulse lasers of pulsed dye amplifier 103 outputs get into the one or three direction laser beam switch 105 after 104 reflections of first right-angle prism, timesharing excites the resonance fluorescence and the dopplerbroadening information of sodium layer atom by direction ground emission 589 nm laser beam.The echo light timesharing of three directions is received by telescope in the optics receiving element 2 210,220,230 respectively; And focus on 589 nm optical fiber light inlet ports on the focal plane separately respectively; Get into the one or three direction fibre-switch 241 through 211,221,231 conduction of 589 nm optical fiber again; Synchronously the echo light of three directions is sent into atomic light filter 301, after first photodetector 302 carried out the photosignal conversion, its electric signal was gathered by first capture card 303 again; Last echo optical information obtains sodium layer wind field, temperature, density information by computing machine 304 storages and processing.
The computing machine 304 control timing controllers 305 of detecting signal unit 3; Make the tripartite switching state of winning consistent, realize that three direction timesharing emitted laser bundles can synchronized transmissions and reception to laser beam switch the 105, the 23 direction laser beam switch the 113, the 1 direction fibre-switch 241 and the two or three direction fibre-switch 242.
Claims (3)
1. an overall height journey atmosphere wind-warm syndrome secret agent surveys laser radar, it is characterized in that, this laser radar is made up of laser emission element (1), optics receiving element (2), detecting signal unit (3);
Laser emission element (1) is made up of continuous light laser instrument (101), acousto-optic modulator (102), pulsed dye amplifier (103), first right-angle prism (104), the one or three direction laser beam switch (105), varactor doubler (106), double-colored high light beam splitter (107), light absorber (108), Nd:YAG laser instrument (111), second right-angle prism (112) and the two or three direction laser beam switch (113); Continuous light laser instrument (101), acousto-optic modulator (102) and the coaxial successively placement of pulsed dye amplifier (103); A right angle face of first right-angle prism (104) is vertical with this axle, the light inlet of another right angle face the one or three direction laser beam switch (105); The light-emitting window of Nd:YAG laser instrument (111) output 532 nm laser is aimed at a right angle face of second right-angle prism (112), the light inlet of another right angle face the two or three direction laser beam switch (113) of second right-angle prism (112); Light-emitting window, varactor doubler (106) and the coaxial successively placement of light absorber (108) of Nd:YAG laser instrument (111) output 1064 nm laser; Between varactor doubler (106) and light absorber (108), place and the double-colored high light beam splitter (107) that should axially become miter angle, the reflection direction of double-colored high light beam splitter (107) is aimed at the pump light light inlet of pulsed dye amplifier (103);
The one or three direction laser beam switch (105) is identical with the structure of the two or three direction laser beam switch (113), and three direction laser beam switchs are made up of motorized precision translation stage controller (401), outer case (402), internal box (403), translation guide rail (404), drive unit (405), five right-angle prisms (411), (412), (421), (431), (432), three stops (414), (423), (434) and three bi-axial tilt platforms (413), (422), (433); The front and back panel of outer case (402) and the center of left and right sides panel are equipped with circular hole; The circular hole of front panel is a light inlet; Panel inboard, the left and right sides and rear panel inboard are settled left limit device (414), right limit device (434) and middle stop (423) respectively, and the bottom surface of outer case (402) is embedded with the translation guide rail (404) of left and right directions motion; Drive unit (405) is settled in internal box (403) bottom, and drive unit (405) is placed on the translation guide rail (404); Internal box (403) is made up of left and right sides panel, rear panel and bottom panel; The center of left and right sides panel and rear panel is equipped with circular hole; Internal box (403) left and right sides panel is coaxial with the circular hole center of circle of outer case (402) left and right sides panel; The circular hole place of internal box (403) left and right sides panel settles the 3rd right-angle prism (411) and the 6th right-angle prism (431) respectively, and these two right-angle prisms are at a distance of 60 mm ~ 100 mm; Three bi-axial tilt platforms (413), (422), (433) are placed in the outside at outer case (402) left and right sides panel and rear panel circular hole place respectively, respectively settle a right-angle prism (412), (421), (432) on three bi-axial tilt platforms (413), (422), (433);
When drive unit (405) along translation guide rail (404) when being moved to the left; Internal box (403) touches left limit device (414) to be stopped; At this moment, the center of centrally aligned outer case (402) the front panel circular hole of the 6th right-angle prism (431) is from laser beam warp the 6th right-angle prism (431) reflection of light inlet vertical incidence; Reflected light just in time vertically passes from internal box (403) right panel circular hole and outer case (402) right panel circular hole, again through the 7th right-angle prism (432) emission;
When drive unit (405) along translation guide rail (404) when moving right; Internal box (403) touches middle stop (423) to be stopped; At this moment; The center of outer case (402) front and back panel circular hole and internal box (403) rear panel circular hole vertically passes through internal box (403) rear panel circular hole and outer case (402) rear panel circular hole from the laser beam of light inlet vertical incidence in a straight line, again through the 5th right-angle prism (421) emission;
When drive unit (405) along translation guide rail (404) when continuing to move right; Internal box (403) touches right limit device (434) and stops; At this moment, the center of centrally aligned outer case (402) the front panel circular hole of the 3rd right-angle prism (411), the laser beam of light inlet vertical incidence is through the 3rd right-angle prism (411) reflection; Reflected light just in time vertically passes from internal box (403) left panel circular hole and outer case (402) left panel circular hole, again through the 4th right-angle prism (412) emission;
Drive unit (405) is got back to the Far Left initial position then, the timesharing switch operating of beginning next round;
589 nm laser beam of the 4th right-angle prism (412) reflection are parallel with the optical axis that first telescope (210) receives the visual field in the one or the three direction laser beam switch (105), and 532 nm laser beam of the 4th right-angle prism (412) reflection depart from optical axis direction 1.5 ~ 15 milliradians that first telescope (210) receives the visual field in the two or the three direction laser beam switch (113); 589 nm laser beam of the 5th right-angle prism (421) reflection are parallel with the optical axis that second telescope (220) receives the visual field in the one or the three direction laser beam switch (105), and 532 nm laser beam of the 5th right-angle prism (421) reflection depart from optical axis direction 1.5 ~ 15 milliradians that second telescope (220) receives the visual field in the two or the three direction laser beam switch (113); 589 nm laser beam of the 7th right-angle prism (432) reflection are parallel with the optical axis that the 3rd telescope (230) receives the visual field in the one or the three direction laser beam switch (105), and 532 nm laser beam of the 7th right-angle prism (432) reflection depart from optical axis direction 1.5 ~ 15 milliradians that the 3rd telescope (230) receives the visual field in the two or the three direction laser beam switch (113);
Optics receiving element (2) is by three telescopes (210), (220), (230), and six roots of sensation optical fiber (211), (212), (221), (222), (231), (232) and two three direction fibre-switch (241), (242) are formed; The reception visual field optical axis of second telescope (220) is a vertical direction; First telescope (210) receive the optical axis of visual field and optical axis that the 3rd telescope (230) receives the visual field on surface level the projection quadrature and have identical angle theta, 15 ° of < < 45 ° of θ with second telescope (220) optical axis; The light inlet of the one 589 nm optical fiber (211) and the one 532 nm optical fiber (212) is side by side at a distance of 3 ~ 30 millimeters placements; The light inlet end face of two optical fiber all is positioned at the place, focal plane of first telescope (210), and the light inlet optical axis of two optical fiber is all parallel with the optical axis of first telescope (210) reception visual field; The light inlet of the 2 589 nm optical fiber (221) and the 2 532 nm optical fiber (222) is side by side at a distance of 3 ~ 30 millimeters placements; The light inlet end face of two optical fiber all is positioned at the place, focal plane of second telescope (220), and the light inlet optical axis of two optical fiber is all parallel with the optical axis of second telescope (220) reception visual field; The light inlet of the 3 589 nm optical fiber (231) and the 3 532 nm optical fiber (232) is side by side at a distance of 3 ~ 30 millimeters placements; The light inlet end face of two optical fiber all is positioned at the place, focal plane of the 3rd telescope (230), and the light inlet optical axis of two optical fiber is all parallel with the optical axis of the 3rd telescope (230) reception visual field;
The one or three direction fibre-switch (241) is identical with the structure of the two or three direction fibre-switch (242), and three direction fibre-switch are made up of the second motorized precision translation stage controller (501), second outer case (502), second internal box (503), the second translation guide rail (504), second drive unit (505), two right-angle prisms (511), (531), three stops (513), (522), (533) and three collimating mirrors (512), (521), (532); The front and back panel of second outer case (502) and the center of left and right sides panel are equipped with circular hole; The circular hole of front panel is a light-emitting window; Panel inboard, the left and right sides and rear panel inboard are settled the stop (522) and the second right limit device (533) in the second left limit device (513), second respectively, and the bottom surface of second outer case (502) is embedded with the second translation guide rail (504) of left and right directions; Second drive unit (505) is settled in second internal box (503) bottom, and second drive unit (505) is placed on the second translation guide rail (504); Second internal box (503) is made up of left and right sides panel, rear panel and bottom panel; The center of second internal box (503) rear panel and left and right sides panel is equipped with circular hole; Second outer case (502) left and right sides panel is coaxial with the circular hole center of circle of second internal box (503) left and right sides panel; The circular hole place of second internal box (503) left and right sides panel settles the 8th right-angle prism (511) and the 9th right-angle prism (531) respectively, and two right-angle prisms (511), (531) are separately fixed on the base plate of second internal box (503) at a distance of 60 mm ~ 100 mm; Second outer case (502) left panel, rear panel and right panel circular hole place settle a collimating mirror respectively; The optical axis of first collimating mirror (512) and the 3rd collimating mirror (532) is coaxial with the circular hole center of circle of second outer case (502) left and right sides panel, and the optical axis of second collimating mirror (521) is coaxial with the circular hole center of circle of second outer case (502) front and back panel;
The bright dipping end end face of the one 589 nm optical fiber (211) is positioned at the place, first collimating mirror (512) focal plane of the one or three direction fibre-switch (241), the light shaft coaxle of first collimating mirror (512) of the bright dipping end optical axis of this optical fiber and the one or three direction fibre-switch (241); The bright dipping end end face of the 2 589 nm optical fiber (221) is positioned at the place, second collimating mirror (521) focal plane of the one or three direction fibre-switch (241), the light shaft coaxle of second collimating mirror (521) of the bright dipping end optical axis of this optical fiber and the one or three direction fibre-switch (241); The bright dipping end end face of the 3 589 nm optical fiber (231) is positioned at the place, the 3rd collimating mirror (532) focal plane of the one or three direction fibre-switch (241), the light shaft coaxle of the 3rd collimating mirror (532) of the bright dipping end optical axis of this optical fiber and the one or three direction fibre-switch (241);
The bright dipping end end face of the one 532 nm optical fiber (212) is positioned at the place, first collimating mirror (512) focal plane of the two or three direction fibre-switch (242), the light shaft coaxle of first collimating mirror (512) of the bright dipping end optical axis of this optical fiber and the two or three direction fibre-switch (242); The bright dipping end end face of the 2 532 nm optical fiber (222) is positioned at the place, second collimating mirror (521) focal plane of the two or three direction fibre-switch (242), the light shaft coaxle of second collimating mirror (521) of the bright dipping end optical axis of this optical fiber and the two or three direction fibre-switch (242); The bright dipping end end face of the 3 532 nm optical fiber (232) is positioned at the place, the 3rd collimating mirror (532) focal plane of the two or three direction fibre-switch (242), the light shaft coaxle of the 3rd collimating mirror (532) of the bright dipping end optical axis of this optical fiber and the two or three direction fibre-switch (242);
When second drive unit (505) along the second translation guide rail (504) when being moved to the left; Second internal box (503) touches the second left limit device (513) to be stopped; At this moment, the center of centrally aligned second outer case (502) the front panel circular hole of the 9th right-angle prism (531), light beam gets into three direction fibre-switch through the 3rd collimating mirror (532); Through the 9th right-angle prism (531) reflection, reflected light just in time vertically passes from the light-emitting window of second outer case (502) front panel;
When second drive unit (505) along the second translation guide rail (504) when moving right; Second internal box (503) touches stop in second (522) to be stopped; At this moment; The center of second outer case (502) front and back panel circular hole and second internal box (503) rear panel circular hole in a straight line, light beam gets into three direction fibre-switch through second collimating mirror (521), directly the light-emitting window through second internal box (503) rear panel circular hole and second outer case (502) front panel vertically passes;
When second drive unit (505) continues along the second translation guide rail (504) when moving right; Second internal box (503) touches the second right limit device (533) and stops; At this moment, the center of centrally aligned second outer case (502) the front panel circular hole of the 8th right-angle prism (511), light beam gets into three direction fibre-switch through first collimating mirror (512); Through the 8th right-angle prism (511) reflection, reflected light just in time vertically passes from the light-emitting window of second outer case (502) front panel;
Detecting control module (3) is made up of atomic light filter (301), first photodetector (302), first capture card (303), Doppler's frequency discriminator (311), second photodetector (312), second capture card (313), computing machine (304) and time schedule controller (305); The optical axis of atomic light filter (301) is coaxial with second outer case (502) the front and back panel circular hole center of the one or three direction fibre-switch (241) of optics receiving element (2); The light-sensitive surface of first photodetector (302) is aimed at the light-emitting window of atomic light filter (301); The output terminal of first photodetector (302) is connected with first capture card (303) input end, and first capture card (303) signal output part is connected with computing machine (304); The optical axis of Doppler's frequency discriminator (311) is coaxial with second outer case (502) the front and back panel circular hole center of the two or three direction fibre-switch (242) of optics receiving element (2); The light-sensitive surface of second photodetector (312) is aimed at the light-emitting window of Doppler's frequency discriminator (311); The output terminal of second photodetector (312) is connected with second capture card (313) input end, and second capture card (313) signal output part is connected with computing machine (304); Computing machine (304) is connected with time schedule controller (305) input end;
Time schedule controller (305) output terminal is connected respectively to the signal input end of the Nd:YAG laser instrument (111) of laser emission element (1); The signal input end of acousto-optic modulator (102); The motorized precision translation stage controller (401) of the one or three direction laser beam switch (105); The motorized precision translation stage controller (401) of the two or three direction laser beam switch (113); Second motorized precision translation stage controller (501) of the one or three direction fibre-switch (241) of optics receiving element (2) and the second motorized precision translation stage controller (501) of the two or three direction fibre-switch (242).
2. a kind of overall height journey atmosphere wind-warm syndrome secret agent according to claim 1 surveys laser radar; It is characterized in that Doppler's frequency discriminator (311) adopts iodine molecule frequency discriminator, dual edge etalon, single edges etalon or atom frequency discriminator in the said detecting signal unit (3).
3. a kind of overall height journey atmosphere wind-warm syndrome secret agent according to claim 1 surveys laser radar; It is characterized in that first telescope (210) in the said optics receiving element (2), second telescope (220) and the 3rd telescope (230) adopt autocollimator, refractor, catadioptric formula telescope or combination telescope simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202566778U CN202631735U (en) | 2012-06-02 | 2012-06-02 | Full-altitude laser radar for detecting wind field, temperature and density of atmosphere |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202566778U CN202631735U (en) | 2012-06-02 | 2012-06-02 | Full-altitude laser radar for detecting wind field, temperature and density of atmosphere |
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| CN202631735U true CN202631735U (en) | 2012-12-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749627A (en) * | 2012-06-02 | 2012-10-24 | 中国科学院武汉物理与数学研究所 | Full-height laser radar for detecting atmosphere wind field, temperature and density |
| CN112596075A (en) * | 2020-11-26 | 2021-04-02 | 兰州大学 | Multi-excitation-wavelength spectrometer type fluorescence laser radar system |
-
2012
- 2012-06-02 CN CN2012202566778U patent/CN202631735U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749627A (en) * | 2012-06-02 | 2012-10-24 | 中国科学院武汉物理与数学研究所 | Full-height laser radar for detecting atmosphere wind field, temperature and density |
| CN102749627B (en) * | 2012-06-02 | 2013-12-18 | 中国科学院武汉物理与数学研究所 | Full-height laser radar for detecting atmosphere wind field, temperature and density |
| CN112596075A (en) * | 2020-11-26 | 2021-04-02 | 兰州大学 | Multi-excitation-wavelength spectrometer type fluorescence laser radar system |
| CN112596075B (en) * | 2020-11-26 | 2022-03-25 | 兰州大学 | Multi-excitation-wavelength spectrometer type fluorescence laser radar system |
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