CN201464659U - All-time full-elevation atmosphere detection lidar - Google Patents
All-time full-elevation atmosphere detection lidar Download PDFInfo
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- CN201464659U CN201464659U CN2009200839675U CN200920083967U CN201464659U CN 201464659 U CN201464659 U CN 201464659U CN 2009200839675 U CN2009200839675 U CN 2009200839675U CN 200920083967 U CN200920083967 U CN 200920083967U CN 201464659 U CN201464659 U CN 201464659U
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Abstract
The utility model discloses an all-time full-elevation atmosphere detection lidar and relates to a lidar, which can detect the atmospheric multiparameters simultaneously from the near surface to the 110 kilometers height and consists of a laser emitting part (1), an optical receiving part (2) and a signal detecting part (3), and the all-time full-elevation atmosphere detection lidar is formed through organic integration of double-wavelength emission, three-channel simultaneous reception, narrow band filter and transceiving joint debugging. The all-time full-elevation atmosphere detection lidar has the advantages that the simultaneous detection for atmospheric parameters in the range of 1-110km height can be realized at night; and the simultaneous detection for atmospheric parameters in two ranges of 1-60km and 80-110km height can be realized in the daytime. The lidar also has the advantages of scientific technical scheme, high system integration, high degree of automation, reliable working and convenient use, and provides a high-performance detection means for the middle and upper atmosphere research and middle and upper atmosphere environmental monitoring.
Description
Technical field:
The utility model relates to laser radar, relates in particular to from the overall height journey laser radar of surveying to 110 kilometers these wide region atmosphere intervals near the ground and the round-the-clock laser radar of continuous 24 hours uninterrupted atmospheric explorations.
Background technology:
From near the ground are the important steps in the sun and earth relationship chain to 110 kilometers upper atmosphere intervals, be the important research field of space physics and atmospheric science.Laser radar has spatial and temporal resolution height, detection sensitivity height, distinguishable detection species and does not have advantages such as atmospheric exploration blind area, is specially adapted to the detection to these interval atmosphere many reference amounts.
The atmospheric exploration laser radar is the boundary with 30 kilometers usually, is divided into low-altitude detection laser radar and aerological sounding laser radar.The aerological sounding laser radar mainly contains two kinds of Rayleigh lidar and resonance fluorescence laser radars, and the detection of Rayleigh lidar highly is generally 30～80 kilometers, and the detection of resonance fluorescence laser radar highly is 80～110 kilometers.Low-altitude detection laser radar below 30 kilometers then mainly contains Mie's scattering laser radar, Raman scattering laser radar, DIAL etc., and wherein Mie's scattering laser radar can be realized the connective detection of about 1～30 kilometer atmosphere.
Germany IAP laser radar group is joined together resonance fluorescence, Rayleigh scattering, three laser radars of Raman scattering, and 1～105 kilometer nocturnal temperature of common realization is surveyed and 80～105 kilometers round-the-clocks are surveyed (Temperature lidar measurements from 1 to 105km altitude using resonance, Rayleigh, and Rotational Raman scattering, Atmos.Chem.Phys.2004,4:793～800).This system that is made up of multi-station laser, many telescopes and many checkout equipments involves great expense, and adjusts complicated, difficult in maintenance.On the one hand, multi-station laser is difficult to realize synchronized transmissions that this can cause many laser radar echo signals asynchronous in time; On the other hand, a plurality of laser beam can spatially produce necessarily and depart from, and cause many laser radar echo signals spatially inconsistent.
Summary of the invention:
The purpose of this utility model is: a kind of all-time overall height atmospheric sounding and observing laser radar is provided, this laser radar organically blends by dual wavelength emission, triple channel reception simultaneously, narrow-band-filter and transmitting-receiving uniting and adjustment etc., realized that not only the separate unit laser radar is to omnidistance detection the at the night of 1～110 kilometer upper atmosphere, also realized the round-the-clock of 1～60 kilometer and 80～110 kilometers atmosphere is surveyed, further expanded the detectivity of laser radar, for atmospheric exploration provides a kind of more efficiently equipment.
To achieve these goals, the utility model adopts following technical scheme:
All-time overall height atmospheric sounding and observing laser radar is grouped into by Laser emission part, optics receiving unit, signal detecting part, wherein:
Dual wavelength emitter in the Laser emission part can produce the 532nm and the 589nm two bundle laser of frequency stabilization simultaneously.532nm laser is launched through first prism, is used to excite Mie scattering below 30 kilometers and 30～80 kilometers Rayleigh scattering; 589nm laser is launched through second prism, is used to excite the resonance fluorescence of 80～110 kilometers sodium layers.Two prisms are installed in respectively on two electronic bi-axial tilt platforms, by the electronic bi-axial tilt platform of computer control, prism are regulated, and make two bundle laser direction on request launch.
Wherein: the dual wavelength emitter is second emitter in a kind of comprehensive multi-functional atmospheric exploration laser radar on the middle and senior level (patent No.: ZL 200710051538.5), Nd:YAG laser instrument in this device adopts the seed implantttion technique to obtain the 532nm laser of frequency stabilization, the output wavelength of 589nm laser is locked in (Chinese science G on the resonance peak of sodium atom, 37 (2): 196-201), make it to produce effectively resonance with high-altitude sodium layer.
The optics receiving unit adopts two receiving telescopes, two optical fiber of parallel placement on the telescopical focal plane, a high-altitude, be respectively applied for and receive 532nm Rayleigh scattering echo light and 589nm sodium fluorescence echo light, and send into diffusing scatter channel of Rayleigh and sodium fluorescence passage; Place an optical fiber on the telescope focal plane, a low latitude, be used to receive 532nm laser low latitude Mie scattering echo light, and send into the Mie scattering passage.The high-altitude telescope adopts the larger caliber receiving telescope and from 3～8 meters on two emission prisms, is when obtaining higher detectivity, effectively avoids the interference of low latitude strong scattering echo light, realizes 30～110 kilometers detections; The low latitude telescope adopts more small-bore receiving telescope and from 0.1～1 meter on emission prism, is saturated the time, to make that the starting altitude of transmitting-receiving coupling is low as far as possible for fear of low latitude strong scattering echo light, realizes 1～30 kilometer detection.
The input part is obtained Mie scattering passage, the Rayleigh scattering passage (patent No.: ZL200710051538.5) with sodium fluorescence passage (patent No.: ZL 200710051538.5) echoed signal, and by computer acquisition and storage simultaneously.In Mie scattering passage, Rayleigh scattering passage and sodium fluorescence passage, all adopted the narrowband light filter of pm magnitude bandwidth, than 2～3 orders of magnitude of common interference filter narrow bandwidth, and have the stronger characteristics of the outer inhibition of band, effective filtering sky background on daytime optical noise, the 532nm and the 589nm laser that cooperate frequency stabilization are realized three-channel round-the-clock detection.
Wherein: the Mie scattering passage is made up of optical fiber collimator, narrowband light filter, focus lamp, photoelectricity detector, optical fiber collimator, narrowband light filter, focus lamp, photodetector are arranged in order, the echo light of optical fiber outlet is collimated into directional light through optical fiber collimator, again through narrowband light filter after focus lamp focuses on photodetector, echo light is transformed into electric signal.
Realize that two bundle laser launch simultaneously, effectively receive in the time of two telescopes and three passages, must adopt effectively transmitting-receiving uniting and adjustment step, could guarantee that 1～110 kilometer overall height journey atmosphere echoed signal all receives and dispatches coupling.High-altitude transmitting-receiving matching process is that the high-altitude telescope is vertically placed and maintained static, and is zenith direction atmosphere echoed signal with what guarantee its detection, adjusts two emission of lasering beam directions and makes it and its reception visual field coupling; Matching process is received and dispatched in the low latitude, and the low latitude telescope is vertically placed, and the emission of lasering beam direction maintains static, and adjusts position, optical fiber one end input port, telescope focal plane place, low latitude and makes it receive visual field and 532nm emission of lasering beam direction coupling.Concrete steps are, high-altitude sodium fluorescence passage and Rayleigh scattering passage transmitting-receiving coupling are by computer control two electronic bi-axial tilt platforms, drive the emission prism and realize the scanning of emission of lasering beam space two-dimensional, make that receiving echo light focuses on two reception optic fibre input ends on the telescope focal plane, high-altitude, realizes 30～80 kilometers and 80～110 kilometers transmitting-receiving couplings respectively; The transmitting-receiving coupling of low latitude Mie scattering passage is by the electronic twin shaft translation stage of computer control, drive that the optical fiber horizontal two-dimension moves on the electronic twin shaft translation stage, the input end that receives optical fiber head is aimed at the low latitude telescope receive the echo optical focus, realize 1～30 kilometer transmitting-receiving coupling.So far, the Mie scattering that dual wavelength is launched simultaneously, two telescope receives simultaneously, Rayleigh scattering, three passage laser radars of sodium fluorescence receiving system complete machine transmitting-receiving uniting and adjustment are finished, and guarantee that high and low empty telescope receives and dispatches coupling in its effective investigative range.
All-time overall height atmospheric sounding and observing laser radar is grouped into by Laser emission part, optics receiving unit, signal detecting part.Wherein: the optics receiving unit is made up of low latitude telescope, first optical fiber, electronic twin shaft translation stage, high-altitude telescope, second optical fiber and the 3rd optical fiber; The low latitude telescope is vertically placed, and electronic twin shaft translation stage arranged parallel is place, telescopical focal plane in the low latitude, and the optical fiber head of first optical fiber, one end is vertically mounted on the center of electronic twin shaft translation stage, and the end face of optical fiber head is positioned on the focal plane; The high-altitude telescope is vertically placed, apart from 3～8 meters of low latitude telescopes, the optical fiber head of second optical fiber, one end and the 3rd optical fiber one end at a distance of 3～30 millimeters placed side by side, the end face of two optical fiber heads all is positioned at place, telescopical focal plane, high-altitude, the optical axis of two optical fiber heads is all parallel with the telescopical optical axis in high-altitude;
The Laser emission part is made up of dual-wavelength laser emitter, first prism, the first electronic bi-axial tilt platform, second prism, the second electronic bi-axial tilt platform; The dual-wavelength laser emitter is exported 532nm and 589nm two bundle laser simultaneously, and the 532nm laser beam is aimed at the first prism center, and first prism is installed on the first electronic bi-axial tilt platform, and the 532nm laser beam is parallel with the high-altitude telescope optic axis behind first prismatic reflection; The 589nm laser beam is aimed at the second prism center, and second prism is installed on the second electronic bi-axial tilt platform, and the 589nm laser beam retrodeviates from high-altitude telescope optic axis direction 1.5～15 Bo radians through second prismatic reflection;
The input part is made up of computing machine, Mie scattering passage, Rayleigh scattering passage and sodium fluorescence passage; The output terminal of Mie scattering passage, Rayleigh scattering passage and sodium fluorescence passage is connected with computing machine respectively, and the output control terminal of computing machine is connected respectively on electronic twin shaft translation stage, the first electronic bi-axial tilt platform and the second electronic bi-axial tilt platform.
Narrowband light filter in the above-mentioned input part in Mie scattering passage, Rayleigh scattering passage and the sodium fluorescence passage adopts composite filter device or birefringent filter or atomic light filter.
Low latitude telescope in the above-mentioned optics receiving unit or high-altitude telescope adopt autocollimator, refractor, catadioptric formula telescope or combination telescope.
Advantage of the present utility model and effect:
All-time overall height atmospheric sounding and observing laser radar has not only been realized omnidistance detection the at night of 1～110 kilometer upper atmosphere of separate unit laser radar detection, realized that also the separate unit laser radar is from 1～60 kilometer and 80～110 kilometers atmosphere round-the-clocks detections, the scheme that possesses skills advanced person, the level of integrated system height, reliable operation, simple to operate, advantages such as working service is convenient, especially guaranteed that emission of lasering beam is synchronous in time, consistent on the space, separate unit laser radar detectivity and range of application have been promoted, thereby can be atmospheric seeing on the middle and senior level research a kind of high-performance detecting devices is provided, also survey and the space weather monitoring and prediction provides a kind of effective new tool for the near space atmospheric environment.
Description of drawings:
Fig. 1 is the all-time overall height atmospheric sounding and observing laser radar synoptic diagram.
Wherein: 1 Laser emission part, 100 dual-wavelength laser emitters, 101 first prisms, 102 first electronic bi-axial tilt platforms, 103 532nm laser beam, 104 second prisms, 105 second electronic bi-axial tilt platforms, 106 589nm laser beam;
2 optics receiving units, 210 low latitude telescopes, 211 first optical fiber, 212 electronic twin shaft translation stages, 200 high-altitude telescopes, 221 second optical fiber, 231 the 3rd optical fiber;
3 input part, 300 computing machines, 310 Mie scattering passages, 320 Rayleigh scattering passages, 330 sodium fluorescence passages.
Embodiment:
All-time overall height atmospheric sounding and observing laser radar is made up of Laser emission part 1, optics receiving unit 2, input part 3, wherein:
Realize that two bundle laser launch simultaneously, effectively receive in the time of two telescopes and three passages, must adopt effectively transmitting-receiving uniting and adjustment step, could guarantee that 1～110 kilometer overall height journey atmosphere echoed signal all receives and dispatches coupling.
All-time overall height atmospheric sounding and observing laser radar transmitting-receiving uniting and adjustment step is:
A1, gather sodium fluorescence passage 330 echoed signals, and with the model atmosphere profile relatively;
If both unanimities of a2 show that sodium fluorescence passage 330 adjusts, enter step a4; If inconsistent, enter step a3;
A3, by the computing machine 300 control second electronic bi-axial tilt platform 105, adjust second prism, 104 angles of inclination, make 589nm echo light far field focus approach the input port of the 3rd optical fiber 231, enter step a1;
A4, gather Rayleigh scattering passage 320 echoed signals, and with the model atmosphere profile relatively;
If both unanimities of a5 show that Rayleigh scattering passage 320 adjusts, enter step a7; If inconsistent, enter step a6;
A6, by the computing machine 300 control first electronic bi-axial tilt platform 102, adjust first prism, 101 angles of inclination, make 532nm echo light far field focus approach the input port of second optical fiber, 221 1 ends, enter step a4;
A7, gather Mie scattering passage 310 echoed signals, and with the model atmosphere profile relatively;
If both unanimities of a8 show that Mie scattering passage 310 adjusts, enter step a10; If inconsistent, enter step a9;
A9, by the electronic twin shaft translation stage 212 of computing machine 300 control, adjust the receiving position of first optical fiber 211, make the input port of the optical fiber 211 of winning approach 532nm laser beam 103 far field focuses, enter step a7;
A10, adjustment finish, and gather and handle three passage echoed signals simultaneously by computing machine.
Narrowband light filter among the embodiment 1 adopts composite filter device, birefringent filter or atomic light filter.
The course of work of the present utility model is:
The 589nm laser that the dual wavelength emitter of Laser emission part sends, excite 80～110 kilometers sodium fluorescences, its echo light focuses on the 3rd optical fiber inlet through the high-altitude telescope, sends into the sodium fluorescence passage, obtains sodium atom number density, the fluctuation information of 80～110 kilometers sodium layers; The 532nm laser that the dual wavelength emitter sends excites 30～80 kilometers atmosphere Rayleigh scatterings, and its echo light focuses on second optical fiber inlet through the high-altitude telescope, sends into the Rayleigh scattering passage, obtains information such as 30～80 kilometers atmospheric densities, temperature, fluctuation; The 532nm laser that the dual wavelength emitter sends, also excite 1～30 kilometer atmosphere Mie scattering simultaneously, its echo light focuses on first optical fiber inlet through the low latitude telescope, sends into the Mie scattering passage, obtains information such as 1～30 kilometer atmospheric density, gasoloid, fluctuation.
In Mie scattering, Rayleigh scattering passage and sodium fluorescence, all adopt the narrowband light filter of pm magnitude bandwidth, cooperated the 532nm and the 589nm laser of frequency stabilization, realized three-channel round-the-clock detection.
Realized omnidistance covering the at night of 1～110 kilometer upper atmosphere of separate unit laser radar detection, and the separate unit laser radar is surveyed from the round-the-clock of 1～60 kilometer and 80～110 kilometers atmosphere.
Claims (3)
1. all-time overall height atmospheric sounding and observing laser radar is made up of Laser emission part (1), optics receiving unit (2), input part (3), it is characterized in that optics receiving unit (2) is made up of low latitude telescope (210), first optical fiber (211), electronic twin shaft translation stage (212), high-altitude telescope (200), second optical fiber (221) and the 3rd optical fiber (231); Low latitude telescope (210) is vertically placed, electronic twin shaft translation stage (212) arranged parallel is at the place, focal plane of low latitude telescope (210), the optical fiber head of first optical fiber (211) one ends is vertically mounted on the center of electronic twin shaft translation stage (212), and the end face of optical fiber head is positioned on the focal plane; High-altitude telescope (200) is vertically placed, apart from (210) 3～8 meters of low latitude telescopes, the optical fiber head of second optical fiber (221) one ends and the 3rd optical fiber (231) one ends is placed side by side at a distance of 3～30 millimeters, the end face of two optical fiber heads all is positioned at the place, focal plane of high-altitude telescope (200), and the optical axis of two optical fiber heads is all parallel with the optical axis of high-altitude telescope (200);
Laser emission part (1) is made up of dual-wavelength laser emitter (100), first prism (101), the first electronic bi-axial tilt platform (102), second prism (104), the second electronic bi-axial tilt platform (105); Dual-wavelength laser emitter (100) is exported 532nm and 589nm two bundle laser simultaneously, 532nm laser beam (103) is aimed at first prism (101) center, first prism (101) is installed on the first electronic bi-axial tilt platform (102), and 532nm laser beam (103) is parallel with high-altitude telescope (200) optical axis after first prism (101) reflection; 589nm laser beam (106) is aimed at second prism (104) center, second prism (104) is installed on the second electronic bi-axial tilt platform (105), and 589nm laser beam (106) retrodeviates from high-altitude telescope (200) optical axis direction 1.5～15 milliradians through second prism (104) reflection;
Input part (3) is made up of computing machine (300), Mie scattering passage (310), Rayleigh scattering passage (320) and sodium fluorescence passage (330); The output terminal of Mie scattering passage (310), Rayleigh scattering passage (320) and sodium fluorescence passage (330) is connected with computing machine (300) respectively, and the output control terminal of computing machine (300) is connected respectively on electronic twin shaft translation stage (212), the first electronic bi-axial tilt platform (102) and the second electronic bi-axial tilt platform (105).
2. all-time overall height atmospheric sounding and observing laser radar according to claim 1, it is characterized in that the narrowband light filter in the described input part (3) in Mie scattering passage (310), Rayleigh scattering passage (320) and the sodium fluorescence passage (330) adopts composite filter device or birefringent filter or atomic light filter.
3. all-time overall height atmospheric sounding and observing laser radar according to claim 1, it is characterized in that low latitude telescope (210) in the described optics receiving unit (2) or high-altitude telescope (200) adopt autocollimator, refractor, catadioptric formula telescope or combination telescope.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104199046A (en) * | 2014-09-28 | 2014-12-10 | 中国科学院空间科学与应用研究中心 | Double-beam full-wave band detection laser radar |
| CN106772312A (en) * | 2016-11-30 | 2017-05-31 | 西安理工大学 | A kind of EO-1 hyperion light-dividing device and light-splitting method for Atmospheric Survey |
| CN109085602A (en) * | 2018-09-19 | 2018-12-25 | 北京聚恒博联科技有限公司 | A kind of atmospheric remote sensing laser radar system |
| CN109164466A (en) * | 2018-10-12 | 2019-01-08 | 北京聚恒博联科技有限公司 | For measuring the laser radar system of temperature humidity profile |
| CN110673156A (en) * | 2019-11-01 | 2020-01-10 | 自然资源部第二海洋研究所 | Double-beam stimulated Brillouin scattering airborne marine laser radar system |
| CN111596312A (en) * | 2020-06-16 | 2020-08-28 | 南京晓庄学院 | Device and method for optimally controlling laser emission power of resonant fluorescence scattering laser radar |
| CN113391327A (en) * | 2021-07-30 | 2021-09-14 | 重庆两江卫星移动通信有限公司 | Doppler wind finding radar system and method based on continuous laser |
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2009
- 2009-03-04 CN CN2009200839675U patent/CN201464659U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199046A (en) * | 2014-09-28 | 2014-12-10 | 中国科学院空间科学与应用研究中心 | Double-beam full-wave band detection laser radar |
| CN106772312A (en) * | 2016-11-30 | 2017-05-31 | 西安理工大学 | A kind of EO-1 hyperion light-dividing device and light-splitting method for Atmospheric Survey |
| CN106772312B (en) * | 2016-11-30 | 2019-05-28 | 西安理工大学 | A kind of EO-1 hyperion light-dividing device and light-splitting method for Atmospheric Survey |
| CN109085602A (en) * | 2018-09-19 | 2018-12-25 | 北京聚恒博联科技有限公司 | A kind of atmospheric remote sensing laser radar system |
| CN109164466A (en) * | 2018-10-12 | 2019-01-08 | 北京聚恒博联科技有限公司 | For measuring the laser radar system of temperature humidity profile |
| CN110673156A (en) * | 2019-11-01 | 2020-01-10 | 自然资源部第二海洋研究所 | Double-beam stimulated Brillouin scattering airborne marine laser radar system |
| CN111596312A (en) * | 2020-06-16 | 2020-08-28 | 南京晓庄学院 | Device and method for optimally controlling laser emission power of resonant fluorescence scattering laser radar |
| CN111596312B (en) * | 2020-06-16 | 2022-05-17 | 南京晓庄学院 | Device and method for optimally controlling laser emission power of resonant fluorescence scattering laser radar |
| CN113391327A (en) * | 2021-07-30 | 2021-09-14 | 重庆两江卫星移动通信有限公司 | Doppler wind finding radar system and method based on continuous laser |
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