CN112904308A - Laser radar system and method for detecting cloud phase state and cloud water content - Google Patents
Laser radar system and method for detecting cloud phase state and cloud water content Download PDFInfo
- Publication number
- CN112904308A CN112904308A CN202110110392.7A CN202110110392A CN112904308A CN 112904308 A CN112904308 A CN 112904308A CN 202110110392 A CN202110110392 A CN 202110110392A CN 112904308 A CN112904308 A CN 112904308A
- Authority
- CN
- China
- Prior art keywords
- cloud
- water content
- laser
- detector
- narrow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a laser radar system for detecting cloud phase state and cloud water content, which comprises a laser transmitting system, a receiving system, a polarization and spectrum analysis system and a data acquisition processor. The detection method of the invention comprises the following steps: 1. detecting to obtain four paths of atmospheric backscattering echo signal power, 2 calculating to obtain a Raman method inversion extinction coefficient and an atmospheric backscattering circle depolarization ratio, 3 calculating an integral backscattering coefficient and an integral depolarization ratio of a cloud layer, 4 judging the cloud layer condition and respectively calculating cloud water content and ice water content. According to the cloud phase state identification method, the cloud phase state is identified according to the depolarization ratio value and the extinction coefficient value, and high-precision cloud phase state identification and high-precision cloud water content evaluation are achieved.
Description
Technical Field
The invention belongs to the technical field of atmospheric detection, relates to a laser radar system for detecting cloud phase states and cloud water content, and further relates to a method for detecting the cloud phase states and the cloud water content by using the laser radar system.
Background
Cloud is one of the most important factors influencing climate change, and has important effects on radiation balance, energy balance and water circulation of a ground gas system. The cloud has three different phase states, the different cloud phase states have different absorption scattering characteristics, and the cloud phase state identification and detection are always the core problems of cloud physics research. The radiation effect of the cloud depends on the vertical structure and the micro physical parameters of the cloud phase state, and the analysis of the macro and micro vertical structure characteristics and the space-time change of the cloud has important significance for the global climate change research. For artificially influenced weather, the cloud is the object of the catalysis operation of artificially influenced weather, and the acquisition of the vertical structure of the cloud and the vertical distribution characteristics of the water content of the cloud is very important for accurately identifying the operation condition and scientifically implementing the catalysis operation.
The laser radar is an active remote sensing instrument, has the advantages of wide detection range and high space-time resolution, and has special advantages in cloud detection. The existing traditional polarization laser radar system has larger uncertainty in the aspect of identifying the cloud phase state, and although researchers also adopt a method of adding a Raman channel to assist in identifying the cloud phase state so as to obtain the cloud water content, the detection performance is greatly influenced and the system is not practical. The millimeter wave radar can also realize the detection of the cloud, but because of its longer wavelength, it is impossible to observe small particles and form the cloud in the early stage.
Disclosure of Invention
The invention aims to provide a laser radar system for detecting cloud phase states and cloud water content, which identifies the cloud phase states according to a depolarization ratio value and an extinction coefficient value, and realizes high-precision identification of the cloud phase states and high-precision evaluation of the cloud water content.
The invention also aims to provide a method for detecting cloud phase and cloud water content by using the laser radar system.
The invention adopts the technical scheme that the laser radar system for detecting the cloud phase state and the cloud water content comprises a laser transmitting system, a receiving system, a polarization and spectrum analysis system and a data acquisition processor.
The receiving system is a telescope.
The laser emission system comprises a laser and a first light path arranged on the emergent light path of the laser
A slide, the optical axis of the laser being parallel to the optical axis of the telescope, a first
The included angle between the azimuth angle of the glass slide and the horizontal vibration polarized light emitted by the laser is 45 degrees.
The lidar system for detecting the cloud phase and the cloud water content according to claim 3, wherein the laser is Nd: YAG pulse laser, and the laser wavelength is 355nm and 1064 nm.
The polarization and spectrum analysis system comprises a collimating lens and a first dichroic mirror which are sequentially arranged on a light path of the telescope, a second dichroic mirror is arranged on a reflected light path of the first dichroic mirror, a first narrow-band light filter, a first converging lens and a first detector are sequentially arranged on a reflected light path of the second dichroic mirror, and a second narrow-band light filter, a second converging lens and a second detector are sequentially arranged on a transmitted light path of the second dichroic mirror; the transmission light path of the first dichroic mirror is sequentially provided with a second
The light path of the reflected light of the polarization spectroscope is provided with a third narrow-band filter, a third converging mirror and a third detector, and the light path of the transmitted light of the polarization spectroscope is provided with a fourth narrow-band filter, a fourth converging mirror and a fourth detector; the first photoelectric detector, the second photoelectric detector, the third photoelectric detector and the fourth photoelectric detector are all in signal connection with the data acquisition processor.
The collimating lens is an aspherical lens with the aperture of 25.4mm and the focal length of 75 mm; the first dichroic mirror separates 355nm, 387nm and 1064 nm; the second dichroic mirror splits colors at 387nm and 355 nm; the bandwidth of the first narrow-band filter is 0.5nm, and the central wavelength is 355 nm; the preferred aperture of the first converging lens is 25.4mm, and the focal length is 50 mm; the bandwidth of the second narrow-band filter is 0.5nm, and the central wavelength is 387 nm; the bandwidth of the third narrow-band filter is 1nm, and the central wavelength is 1064 nm; the bandwidth of the fourth narrow-band filter is 1nm, and the central wavelength is 1064 nm.
The invention adopts another technical proposal that a method for detecting cloud phase state and cloud water content,
step 1, detecting by using a laser radar system to obtain four paths of atmosphere backscattering echo signal power, wherein the backward power of 355nm detected by a first detector is P1, the backward power of 387nm detected by a second detector 12 is P2, the backward power of 1064nm detected by a third detector is P3, and the backward power of 1064nm detected by a fourth detector 20 is P4;
and 2, substituting the echo signal power P1 and P2 obtained in the step 1 into a formula (1), and calculating to obtain a Raman inversion extinction coefficient alpha (lambda 355, r) of 355nm in the detected atmosphere:
calculating according to the formula (2) to obtain the atmospheric backscattering coefficient beta (lambda 355, r)
Substituting the echo signal power P3 and P4 obtained in the step 1 into a formula (3) to calculate and obtain an atmospheric backscattering circular depolarization ratio delta circ;
calculating to obtain the linear depolarization ratio according to the circular depolarization ratio
if the cloud is water cloud, the cloud water content LWC is judged by inverting the extinction coefficient alpha and the depolarization ratio delta' according to a Raman method, and the calculation is carried out according to the following formula:
if the ice cloud is obtained, calculating the effective radius Re according to the inversion extinction coefficient alpha of the Raman method and the formula (7), further calculating the ice water content in the ice cloud according to the following formula (9),
according to the invention, through an observation system and an independent algorithm, the identification and evaluation precision of cloud phase states and cloud water content is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a laser radar system for detecting cloud phase and cloud water content according to the present invention.
In the figure, 1 is a laser, 2 is a first laser
The system comprises a glass slide, 3 a telescope, 4 a collimating mirror, 5 a first dichroic mirror, 6 a second dichroic mirror, 7 a first narrow-band filter, 8 a first converging mirror, 9 a first detector, 10 a second narrow-band filter, 11 a second converging mirror, 12 a second detector, 13 a second converging mirror
The system comprises a glass slide, 14 a polarizing beam splitter, 15 a third narrow-band filter, 16 a third converging lens, 17 a third detector, 18 a fourth narrow-band filter, 19 a fourth converging lens, 20 a fourth detector and 21 a data acquisition processor.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The laser radar system for detecting cloud phase state and cloud water content comprises a laser emitting system, a receiving system, a polarization and spectrum analysis system and a data acquisition processor 21.
The receiving system is a telescope 3.
The laser emission system comprises a laser 1 and a first light path arranged on the emergent light path of the laser 1
A slide 2, the optical axis of the laser 1 being parallel to the optical axis of the telescope 3, a first
The angle between the azimuth angle of the glass slide 2 and the horizontally vibrating polarized light emitted by the laser 1 is 45 degrees.
YAG pulse laser is adopted as the laser 1, and the emitted laser wavelength is 355nm and 1064 nm.
The polarization and spectrum analysis system comprises a collimating lens 4 and a first dichroic mirror 5 which are sequentially arranged on the light path of a telescope 3, a second dichroic mirror 6 is arranged on the reflected light path of the first dichroic mirror 5, and a first narrow-band filtering light path is sequentially arranged on the reflected light path of the second dichroic mirror 6The light path of the second dichroic mirror 6 is sequentially provided with a second narrow-band light filter 10, a second converging mirror 11 and a second detector 12; the transmission light path of the first dichroic mirror 5 is provided with a second light path in sequence
The device comprises a glass slide 13 and a polarization spectroscope 14, wherein a reflection light path of the polarization spectroscope 14 is provided with a third narrow-band optical filter 15, a third converging mirror 16 and a third detector 17, and a transmission light path of the polarization spectroscope 14 is provided with a fourth narrow-band optical filter 18, a fourth converging mirror 19 and a fourth detector 20; the first photodetector 9, the second photodetector 12, the third photodetector 17 and the fourth photodetector 20 are all in signal connection with a data acquisition processor 21.
The collimating lens 4 is an aspherical lens with the aperture of 25.4mm and the focal length of 75 mm; the first dichroic mirror 5 separates 355nm, 387nm, and 1064 nm; the second dichroic mirror 6 is dichroic at 387nm and 355 nm; the bandwidth of the first narrow-band filter 7 is 0.5nm, and the central wavelength is 355 nm; the aperture of the first converging lens 8 is preferably 25.4mm, and the focal length is preferably 50 mm; the bandwidth of the second narrow-band filter 10 is 0.5nm, and the central wavelength is 387 nm; the bandwidth of the third narrow-band filter 15 is 1nm, and the central wavelength is 1064 nm; the fourth narrow band filter 18 has a bandwidth of 1nm and a central wavelength of 1064 nm.
The invention discloses a method for detecting cloud phase and cloud water content by using a laser radar system, which comprises the following steps:
step 1, detecting by using a laser radar system to obtain four paths of atmosphere backscattering echo signal power, wherein the backward power of 355nm detected by a first detector 9 is P1, the backward power of 387nm detected by a second detector 12 is P2, the backward power of 1064nm detected by a third detector 17 is P3, and the backward power of 1064nm detected by a fourth detector 20 is P4;
and 2, substituting the echo signal power P1 and P2 obtained in the step 1 into a formula (1), and calculating to obtain a Raman inversion extinction coefficient alpha (lambda 355, r) of 355nm in the detected atmosphere:
calculating according to the formula (2) to obtain the atmospheric backscattering coefficient beta (lambda 355, r)
Substituting the echo signal power P3 and P4 obtained in the step 1 into a formula (3) to calculate and obtain an atmospheric backscattering circular depolarization ratio delta circ;
calculating to obtain the linear depolarization ratio according to the circular depolarization ratio
if the cloud is water cloud, the cloud water content LWC is judged by inverting the extinction coefficient alpha and the depolarization ratio delta' according to a Raman method, and the calculation is carried out according to the following formula:
if the ice cloud is obtained, calculating the effective radius Re according to the inversion extinction coefficient alpha of the Raman method and the formula (7), further calculating the ice water content in the ice cloud according to the following formula (9),
the specific implementation mode of the invention is as follows:
the laser 1 in the polarization-Raman laser radar system for detecting the cloud phase state and evaluating the cloud water content adopts a Nd-YAG pulse laser, the selected wavelength is 355nm and 1064nm, for example, the Nd-YAG type SURELITE III pulse laser of Continuum company in the United states, the single pulse energy is 1J @1064nm, 300mJ @355nm, the repetition frequency is 10Hz, and the pulse width is 4-6 nsec. The laser 1 emits horizontally oscillating polarized light.
The laser emitted by the laser 1 enters the first
Slide 2, first
Slide 2 grade 0 slides from Thorlabs were selected.
The telescope 3 is a symmetrical reflective telescope, such as a 400mm Schmidt-Cassegrain telescope manufactured by Meade, USA.
The telescope 3 is used for receiving the scattered light which is emitted by the laser 1 and scattered by the atmosphere, and collecting and emitting the scattered light.
The telescope 3 emits light, the light passes through the collimating mirror 4, the collimating mirror 4 converts a converged light beam into a quasi-parallel light beam and emits the quasi-parallel light beam into the first dichroic mirror 5, the first dichroic mirror 5 separates light waves with the wavelength of less than 400nm and light waves with the wavelength of more than 400nm, the reflected light waves with the wavelength of less than 400nm emit the quasi-parallel light beam into the second dichroic mirror 6, the second dichroic mirror 6 separates light waves with the wavelength of 387nm and light waves with the wavelength of 355nm, the reflected light waves with the wavelength of 355nm pass through the first narrow-band light filter 7, the bandwidth of the narrow-band light filter 7 is 0.5nm, the narrow-band light filter 7 filters background light outside the waveband and then enters the first converging mirror 8, the first converging mirror 8 converges the light with the wavelength of 355nm onto the focal plane of the first detector 9, and the first detector 9 adopts a PM.
The transmitted light of the second dichroic mirror 6 passes through a second narrow-band filter 10, the center wavelength of the second narrow-band filter 10 is 387nm, the bandwidth is 0.5nm, the second narrow-band filter 10 filters background light outside the waveband and then enters a second converging mirror 11, and the second converging mirror 11 converges the light with the 387nm wavelength on the photosensitive surface of a second detector 12.
The transmitted light of the first dichroic mirror 5 enters the second
A slide 13 disposed at 45 degrees for converting polarization component of the echo signal into a detectable amount in a rear optical path, and a second
The slide 13 is a 0-grade slide from Thorlabs, and then enters a polarizing beam splitter 14, and the polarizing beam splitter 14 separates p light and s light, which are polarization components of the echo.
The reflected light of the polarization beam splitter 14 passes through a third narrow-band filter 15, the central wavelength of the third narrow-band filter 15 is 1064nm, the bandwidth is 1nm, the third narrow-band filter 15 filters out solar background light except 1064nm, the solar background light enters a third converging mirror 16, the third converging mirror 16 converges the reflected light beam onto a photosensitive surface of a third detector 17, and the third detector 17 is a Hamamatsu Si APD detector with the model number of S115119-30.
The transmitted light of the polarization beam splitter 14 passes through a fourth narrow-band filter 18, the center wavelength of the fourth narrow-band filter 18 is 1064nm, the bandwidth is 1nm, the fourth narrow-band filter 18 filters out solar background light except 1064nm, the solar background light enters a fourth converging mirror 19, the fourth converging mirror 19 converges the reflected light beam onto a photosensitive surface of a fourth detector 20, and the fourth detector 20 is a Hamamatsu Si APD detector with the model number of S115119-30.
The first photodetector 9, the second photodetector 12, the third photodetector 17 and the fourth photodetector 20 all send data to a data acquisition processor 21. The data acquisition processor 21 is a data acquisition card from NI corporation.
Claims (7)
1. The laser radar system for detecting the cloud phase state and the cloud water content is characterized by comprising a laser transmitting system, a receiving system, a polarization and spectrum analysis system and a data acquisition processor (21).
2. Lidar system for detection of cloud phases and cloud water content according to claim 1, characterized in that said receiving system is a telescope (3).
3. The lidar system for detecting cloud phase and cloud water content according to claim 2, wherein the laser emitting system comprises a laser (1) and a first laser disposed on an emitting optical path of the laser (1)
A glass slide (2), the optical axis of the laser (1) being parallel to the optical axis of the telescope (3), the first
The included angle between the azimuth angle of the glass slide (2) and the horizontal vibration polarized light emitted by the laser (1) is 45 degrees.
4. The lidar system for detecting cloud phase and cloud water content according to claim 3, wherein the laser (1) is Nd: YAG pulse laser emitting laser wavelength of 355nm and 1064 nm.
5. The lidar system for detecting cloud phase and cloud water content of claim 2, wherein the lidar system is configured to detect the cloud phase and the cloud water contentThe polarization and spectrum analysis system comprises a collimating mirror (4) and a first dichroic mirror (5) which are sequentially arranged on a light path of the telescope (3), a second dichroic mirror (6) is arranged on a reflected light path of the first dichroic mirror (5), a first narrow-band light filter (7), a first converging mirror (8) and a first detector (9) are sequentially arranged on the reflected light path of the second dichroic mirror (6), and a second narrow-band light filter (10), a second converging mirror (11) and a second detector (12) are sequentially arranged on a transmitted light path of the second dichroic mirror (6); a second dichroic mirror (5) is sequentially arranged on the transmission light path
The device comprises a glass slide (13) and a polarization spectroscope (14), wherein a reflection light path of the polarization spectroscope (14) is provided with a third narrow-band filter (15), a third converging mirror (16) and a third detector (17), and a transmission light path of the polarization spectroscope (14) is provided with a fourth narrow-band filter (18), a fourth converging mirror (19) and a fourth detector (20); the first photoelectric detector (9), the second photoelectric detector (12), the third photoelectric detector (17) and the fourth photoelectric detector (20) are in signal connection with a data acquisition processor (21).
6. The lidar system for detecting cloud phase and cloud water content according to claim 5, wherein the collimating mirror (4) is an aspheric mirror with a caliber of 25.4mm and a focal length of 75 mm; the first dichroic mirror (5) separates 355nm, 387nm and 1064 nm; the second dichroic mirror (6) is used for carrying out color separation at 387nm and 355 nm; the bandwidth of the first narrow-band filter (7) is 0.5nm, and the central wavelength is 355 nm; the preferred caliber of the first converging lens (8) is 25.4mm, and the focal length is 50 mm; the bandwidth of the second narrow-band filter (10) is 0.5nm, and the central wavelength is 387 nm; the bandwidth of the third narrow-band filter (15) is 1nm, and the central wavelength is 1064 nm; the bandwidth of the fourth narrow-band filter (18) is 1nm, and the central wavelength is 1064 nm.
7. The lidar system for detecting cloud phase and cloud water content according to claim 1, further comprising:
step 1, detecting by using a laser radar system to obtain four paths of atmosphere backscattering echo signal power, wherein the backward power of 355nm detected by a first detector (9) is P1, the backward power of 387nm detected by a second detector (12) is P2, the backward power of 1064nm detected by a third detector (17) is P3, and the backward power of 1064nm detected by a fourth detector 20 is P4;
and 2, substituting the echo signal power P1 and P2 obtained in the step 1 into a formula (1), and calculating to obtain a Raman inversion extinction coefficient alpha (lambda 355, r) of 355nm in the detected atmosphere:
calculating according to the formula (2) to obtain the atmospheric backscattering coefficient beta (lambda 355, r)
Substituting the echo signal power P3 and P4 obtained in the step 1 into a formula (3) to calculate and obtain an atmospheric backscattering circular depolarization ratio delta circ;
calculating to obtain the linear depolarization ratio according to the circular depolarization ratio
Step 3, calculating an integral backscattering coefficient beta ' and an integral depolarization ratio delta ' of the cloud layer '
Step 4, the cloud integral backscattering coefficient of the water cloud is reduced along with the increase of the cloud integral depolarization ratio, and the water cloud presents obvious negative correlation; the cloud integral backscattering coefficient of the ice cloud is increased along with the increase of the cloud integral depolarization ratio, positive correlation is presented, and the detected cloud layer is judged to be water cloud or ice cloud according to the change condition of the backscattering coefficient;
if the cloud is water cloud, the cloud water content LWC is judged by inverting the extinction coefficient alpha and the depolarization ratio delta' according to a Raman method, and the calculation is carried out according to the following formula:
if the ice cloud is obtained, calculating the effective radius Re according to the inversion extinction coefficient alpha of the Raman method and the formula (7), further calculating the ice water content in the ice cloud according to the following formula (9),
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110110392.7A CN112904308A (en) | 2021-01-27 | 2021-01-27 | Laser radar system and method for detecting cloud phase state and cloud water content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110110392.7A CN112904308A (en) | 2021-01-27 | 2021-01-27 | Laser radar system and method for detecting cloud phase state and cloud water content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112904308A true CN112904308A (en) | 2021-06-04 |
Family
ID=76118891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110110392.7A Pending CN112904308A (en) | 2021-01-27 | 2021-01-27 | Laser radar system and method for detecting cloud phase state and cloud water content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112904308A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616520A (en) * | 2022-12-20 | 2023-01-17 | 成都远望探测技术有限公司 | Cirrus cloud ice crystal shape recognition method based on laser and millimeter wave cloud radar |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006014264U1 (en) * | 2006-09-13 | 2006-12-14 | Stiftung Alfred-Wegener-Institut Für Polar- Und Meeresforschung | Light detection and ranging system or optical radar, for remote measurement of atmospheric aerosols, measures elastic-, Raman- and fluorescence back-scattering |
| CN102830107A (en) * | 2012-09-04 | 2012-12-19 | 南京信息工程大学 | Laser radar detection method and system for measuring contents of solid water and liquid water in cloud |
| CN204731410U (en) * | 2015-07-22 | 2015-10-28 | 武汉大学 | A kind of polarization Raman lidar emitting-receiving system |
| US20170212218A1 (en) * | 2015-06-29 | 2017-07-27 | University Corporation For Atmospheric Research | Diode laser based high spectral resolution lidar |
| CN107064957A (en) * | 2017-04-05 | 2017-08-18 | 南京信息工程大学 | A kind of many visual field laser radar detection system and methods measured for liquid water cloud |
| CN108957474A (en) * | 2018-06-12 | 2018-12-07 | 西安理工大学 | For detecting the full polarization lidar system and its detection method of particle shape |
| CN110988913A (en) * | 2019-12-20 | 2020-04-10 | 江苏亮点光电科技有限公司 | Semiconductor laser ceilometer with double optical axis structure |
-
2021
- 2021-01-27 CN CN202110110392.7A patent/CN112904308A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006014264U1 (en) * | 2006-09-13 | 2006-12-14 | Stiftung Alfred-Wegener-Institut Für Polar- Und Meeresforschung | Light detection and ranging system or optical radar, for remote measurement of atmospheric aerosols, measures elastic-, Raman- and fluorescence back-scattering |
| CN102830107A (en) * | 2012-09-04 | 2012-12-19 | 南京信息工程大学 | Laser radar detection method and system for measuring contents of solid water and liquid water in cloud |
| US20170212218A1 (en) * | 2015-06-29 | 2017-07-27 | University Corporation For Atmospheric Research | Diode laser based high spectral resolution lidar |
| CN204731410U (en) * | 2015-07-22 | 2015-10-28 | 武汉大学 | A kind of polarization Raman lidar emitting-receiving system |
| CN107064957A (en) * | 2017-04-05 | 2017-08-18 | 南京信息工程大学 | A kind of many visual field laser radar detection system and methods measured for liquid water cloud |
| CN108957474A (en) * | 2018-06-12 | 2018-12-07 | 西安理工大学 | For detecting the full polarization lidar system and its detection method of particle shape |
| CN110988913A (en) * | 2019-12-20 | 2020-04-10 | 江苏亮点光电科技有限公司 | Semiconductor laser ceilometer with double optical axis structure |
Non-Patent Citations (1)
| Title |
|---|
| 陈思颖;田依杉;陈和;张寅超;郭磐;: "粒子退偏比测量拉曼-米偏振激光雷达系统设计与仿真", 北京理工大学学报, no. 10 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616520A (en) * | 2022-12-20 | 2023-01-17 | 成都远望探测技术有限公司 | Cirrus cloud ice crystal shape recognition method based on laser and millimeter wave cloud radar |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11243295B2 (en) | Optical filter | |
| CN106772438B (en) | A kind of laser radar system of round-the-clock accurate measurement atmospheric temperature and aerosol parameters | |
| CN108303706B (en) | Aerosol optical parameter detection method and hyperspectral laser radar detection system | |
| CN102564909B (en) | Laser self-mixing multi-physical parameter measurement method and device for atmospheric particulate | |
| CN108957474B (en) | Full-polarization laser radar system for detecting particle morphology and detection method thereof | |
| CN207882443U (en) | A kind of EO-1 hyperion Airborne Lidar examining system | |
| WO2021103715A1 (en) | Radiation calibration method for airborne hyperspectral imaging laser radar system | |
| CN107727008B (en) | Device and method for measuring transmitting and receiving coaxiality of active photoelectric system | |
| CN110967704B (en) | Laser radar system device for measuring atmospheric carbon dioxide concentration and aerosol vertical profile by multiple wavelengths | |
| CN1987520A (en) | Raman scattering laser radar system for meterological and atmospheric environment observation | |
| CN110673157B (en) | High spectral resolution laser radar system for detecting ocean optical parameters | |
| CN103344964B (en) | Laser radar device for distinguishing dust-haze classifications in remote sensing mode | |
| WO2011066808A1 (en) | High-spectrum resolution laser radar device with real-time calibration | |
| CN102879835B (en) | A kind of measuring method of laser precipitation weather phenomenon and laser precipitation weather phenomenon instrument | |
| CN110045391B (en) | Hyperspectral laser radar system for aerosol dimension spectrum measurement | |
| CN106646429B (en) | A kind of device and method of the self-calibration geometrical factor for laser radar | |
| CN109990843B (en) | Method and device for monitoring flight speed and environmental parameters of aircraft | |
| CN110161280B (en) | Hybrid detection Doppler laser radar wind speed measurement system and measurement method thereof | |
| CN110441792B (en) | Rayleigh scattering laser radar system capable of measuring wind and temperature simultaneously and related calibration method | |
| CN106249252B (en) | Detect the airborne near-infrared laser radar system and inversion method of subcooled water in cloud | |
| CN106643668B (en) | Atmospheric laser occultation signal generating and detecting equipment | |
| CN110488252B (en) | Overlay factor calibration device and calibration method for ground-based aerosol laser radar system | |
| CN114660573A (en) | Laser radar system for measuring concentration of atmospheric carbon dioxide and methane column | |
| CN112904308A (en) | Laser radar system and method for detecting cloud phase state and cloud water content | |
| Bobrovnikov et al. | A Multi-Aperture Transceiver System of a Lidar with Narrow Field of View and Minimal Dead Zone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |