CN110456382A - The measurement method of inhomogeneous winds wind vector based on single Doppler lidar - Google Patents
The measurement method of inhomogeneous winds wind vector based on single Doppler lidar Download PDFInfo
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- CN110456382A CN110456382A CN201910629102.2A CN201910629102A CN110456382A CN 110456382 A CN110456382 A CN 110456382A CN 201910629102 A CN201910629102 A CN 201910629102A CN 110456382 A CN110456382 A CN 110456382A
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- 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
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- 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
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Abstract
The measurement method of inhomogeneous winds wind vector based on single Doppler lidar, after reading the radial air speed data that single Doppler lidar measures, radial level wind speed is translated into according to the laser radar elevation angle, VAD method is recycled to handle the radial level wind speed on sustained height, the background wind speed and background wind direction on each range bin can be obtained due to VAD method, background wind speed and direction on all range bins is together as to the Background Winds wind speed and wind direction of measured zone, the tangential wind speed of each spatial point is acquired according to the angled relationships and Background Winds wind speed of Background Winds wind direction and laser radar scanning radial direction, tangential wind speed and single Doppler lidar are directly measured resulting radial wind speed to be synthesized to obtain wind vector, can the accurate acquisition measurement moment it is non-homogeneous The wind vector information of wind field, this method is simple and easy to do, overcomes existing method and assumes the uniformity of inhomogeneous winds and lead to not the deficiency for really reflecting inhomogeneous winds information, improves the accuracy of inhomogeneous winds inverting.
Description
Technical field
The invention belongs to laser radar technique fields, and in particular to a kind of random wind based on single Doppler lidar
The measurement method of field wind vector, this method can be based on the radial air speed data and VAD that single Doppler lidar directly measures
Algorithm realizes the measurement to inhomogeneous winds wind vector.
Background technique
When Doppler lidar carries out measuring wind speed, according to doppler principle, atmospheric molecule or the gas for characterizing wind speed are molten
The mass motion of micelle, can make the frequency of back scattering laser shift, i.e. Doppler frequency shift.By receiving aerosol particle
Local oscillator light in the backscatter signal and system of son carries out beat frequency and detects Doppler frequency shift, is calculated by analysis Doppler frequency shift
The radial component of wind speed out, and then the information such as wind speed, wind direction are finally inversed by, radial wind speed VLosWith Doppler frequency shift fDRelationship can
To indicate are as follows: fD=2V*cos γ/λ=2VLos/ λ, wherein V is the movement velocity of particulate, and γ is laser emitting direction
With the angle of the particulate direction of motion, VLosFor radial velocity, λ is transmitting optical maser wavelength, fDFor Doppler frequency shift.For example,
When wavelength is 1.55 μm, the corresponding radial wind speed of 1MHz Doppler frequency shift is about 0.78m/s.
The measurement method of original pair of inhomogeneous winds wind vector is all the wind speed directly measured to Doppler lidar
Data obtain after being handled, but since the air speed data that single laser radar measures all is radial wind speed information, non-with reality
The wind speed information of even wind field is not fully consistent, can not really reflect the practical wind field information at measurement moment, it is therefore desirable to solve
The conjunction wind vector of inhomogeneous winds measures moment actual wind speed information to reflect.
Summary of the invention
The object of the present invention is to provide a kind of radial air speed data solutions measured using single coherent Doppler lidar
The method of inhomogeneous winds wind vector, to overcome the shortcomings of existing methods, the actual wind speed at more true reflection measurement moment.
The principle of wind vector method for solving of the invention is: the radial wind speed information that Doppler lidar measures is read,
Acquire radial level wind speed according to the angle of laser emitting angle and horizontal direction, to the radial level wind speed on sustained height into
Row VAD processing finds out background wind speed and wind direction, is acquired pair according to the angle of background wind direction and radar radial direction and background wind speed
The tangential wind speed information answered, then tangential wind speed and original radial level wind speed are synthesized, wind vector can be acquired.
The measurement method of inhomogeneous winds wind vector based on single Doppler lidar, comprising:
1) wind field is measured using PPI scan pattern using Doppler lidar, obtains each sky of measured zone
Between the radial air speed data put；PPI scan pattern refers to fixed elevation, changes azimuthal scanning mode, and the data of acquisition are anti-
Drill polar form the result is that centered on radar；
2) read and the radial air speed data of gained measured by single Doppler lidar, according to the laser emitting direction of radar with
The angle of horizontal direction is converted into radial level wind speed；
Characterized by the following steps:
3) wind speed signal-to-noise ratio data is read, setting snr threshold is 5, which is obtained by observation signal-to-noise ratio data, right
Horizontal radial air speed data carries out just processing, sets null value for the horizontal radial air speed data for being unsatisfactory for threshold value and rejects, is connecing
It is not handled in the data handling procedure got off；
4) the horizontal radial horizontal wind speed data chosen on the same range bin of sustained height carry out VAD (Velocity
Azimuth Display Velocity Azimuth explicit representation) processing, the wind field vertical distribution data on measurement moment range bin are obtained,
After carrying out VAD processing to the air speed datas of whole range bins, resulting result as the Background Winds wind speed for measuring the moment and
Wind direction data；The data include Background Winds air speed data and wind direction data；
5) angle and Background Winds air speed data of the background wind direction data and radar radial direction obtained using step 4, meter
Calculation obtains the corresponding horizontal tangential wind speed of measured zone each spatial point；
6) at each spatial point, the horizontal tangential wind speed obtained will be calculated, the diameter directly measured with laser radar is aweather
Speed is synthesized, and the wind vector of each spatial point is obtained, to obtain the wind vector information of entire measured zone inhomogeneous winds.
Above-mentioned mensuration is applied to carry out inverting to wind power plant's wind field information.
Compared with the conventional method, major advantage is the present invention:
This method can be calculated the more accurate practical wind field information of acquisition, be compared by the utilization to mature VAD technology
Reality only can be reflected come the method for WIND FIELDS information according to the radial air speed data that laser radar measures to the greatest extent in originally
Border wind field.
Existing method can not solve vector wind field, and the inverting to inhomogeneous winds wind vector may be implemented in this method.
This method principle is simple, and processing data procedures are easily achieved, and accuracy is high, does not need to carry out hardware to radar system
On change, it is only necessary to take the processing method that can acquire measurement moment more true wind field letter in data handling procedure
Breath.
Detailed description of the invention
Fig. 1 is to solve for the conjunction anemobiagraph of wind vector acquisition.
Fig. 2 is to solve for the wind rose of wind vector acquisition.
Specific embodiment
The measurement method of inhomogeneous winds wind vector based on single Doppler lidar, comprising:
1) wind field is measured using PPI scan pattern using Doppler lidar, obtains each sky of measured zone
Between the radial air speed data put；PPI scan pattern refers to fixed elevation, changes azimuthal scanning mode, and the data of acquisition are anti-
Drill polar form the result is that centered on radar；
2) the radial air speed data that Doppler lidar measures is read, according to radial air speed data and laser emitting direction
With the angle of horizontal directionAcquire horizontal radial wind speed VHLOS,Wherein VLOSFor laser thunder
Up to the radial air speed data directly measured；
It is characterized in that further comprising the steps of:
3) wind speed signal-to-noise ratio data is read, setting snr threshold is 5, which is obtained by observation signal-to-noise ratio data, right
Horizontal radial air speed data carries out just processing, sets null value for the horizontal radial air speed data for being unsatisfactory for threshold value and rejects, is connecing
It is not handled in the data handling procedure got off；
4) the horizontal radial air speed data chosen on the same range bin of sustained height carries out VAD processing, obtains the measurement moment
Wind field vertical distribution data on the range bin, after carrying out VAD processing to the air speed data of whole range bins, resulting result
As the background air speed data at measurement moment, which includes Background Winds air speed data VbgAnd wind direction data；
5) angle α and background air speed data of the background wind direction data and radar radial direction obtained using step 4, is calculated
Obtain the corresponding horizontal tangential wind speed V of measured zone each spatial pointHper, VHper=Vbg* sin (α), wherein per is
The abbreviation of perpendicular,
After acquiring Background Winds wind speed and direction using vad algorithm in step 4, it is believed that step 2 radar calibrate to
Wind speed, as component of the background wind speed in radar scanning in the radial direction, therefore solve wind vector demand and solve background wind speed
Component in the tangential direction, as horizontal tangential wind speed；
6) at each spatial point, the horizontal tangential wind speed V that will be calculatedHperIt is surveyed with script laser radar
The radial wind speed obtained is synthesized, and obtains the wind vector that can reflect inhomogeneous winds information, wherein inhomogeneous winds wind speedInhomogeneous winds wind direction angle valueWherein β is every
The corresponding radial direction angle value of a spatial point is known quantity.
The wind power plant that Chinese Marine University in 2016 is measured in Donghai Bridge in Shanghai using single Doppler lidar
Radial air speed data verified, as shown in Figures 1 and 2.The conjunction anemobiagraph that Fig. 1 is as finally acquired, can be more clear in figure
Clear sees blower velocity wake region, and Fig. 2 is wind rose.
Inverting, available accurately true wind field data are carried out to wind power plant's wind field information using the algorithm
Structure, this all has more important influence for the addressing and design of wind power plant and the selection of blower position etc..
Research side of the algorithm for inhomogeneous winds such as other small scale process such as clear sky wind shear, clear-air turbulence simultaneously
Method also has certain inspiration meaning.
Claims (2)
1. the measurement method of the inhomogeneous winds wind vector based on single Doppler lidar, comprising:
1) wind field is measured using PPI scan pattern using Doppler lidar, obtains each spatial point of measured zone
Radial air speed data；PPI scan pattern refers to fixed elevation, changes azimuthal scanning mode, the data inversion knot of acquisition
Fruit is polar form centered on radar；
2) reading measures the radial air speed data of gained by single Doppler lidar, according to the laser emitting direction of radar and level
The angle in direction is converted into radial level wind speed；
Characterized by the following steps:
3) wind speed signal-to-noise ratio data is read, setting snr threshold is 5, which is obtained by observation signal-to-noise ratio data, to level
Radial air speed data carries out just processing, sets null value for the horizontal radial air speed data for being unsatisfactory for threshold value and rejects, following
Data handling procedure in it is not handled；
4) the horizontal radial horizontal wind speed data chosen on the same range bin of sustained height carry out VAD(Velocity Azimuth
Display Velocity Azimuth explicit representation) processing, obtain measurement the moment range bin on wind field vertical distribution data, to all away from
After air speed data from library carries out VAD processing, Background Winds wind speed and wind direction data of the resulting result as the measurement moment；
The data include Background Winds air speed data and wind direction data；
5) angle and Background Winds air speed data of the background wind direction data and radar radial direction obtained using step 4, is calculated
To the corresponding horizontal tangential wind speed of measured zone each spatial point；
6) at each spatial point, will calculate obtain horizontal tangential wind speed, the radial wind speed directly measured with laser radar into
Row synthesis, obtains the wind vector of each spatial point, to obtain the wind vector information of entire measured zone inhomogeneous winds.
2. the application of measurement method described in claim, it is characterized in that the mensuration is applied to wind power plant's wind field information
Carry out inverting.
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| CN111475942A (en) * | 2020-04-03 | 2020-07-31 | 上海电气风电集团股份有限公司 | Wind resource quality evaluation method, system, medium, and electronic device |
| CN111505596A (en) * | 2020-04-16 | 2020-08-07 | 北京理工大学重庆创新中心 | Three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology |
| CN111562081A (en) * | 2020-04-30 | 2020-08-21 | 成都英鑫光电科技有限公司 | Flow field testing method and device, electronic equipment and computer readable storage medium |
| CN111624623A (en) * | 2020-06-02 | 2020-09-04 | 青岛镭测创芯科技有限公司 | Wind field inversion method based on laser radar non-uniform scanning |
| CN111856511A (en) * | 2020-07-07 | 2020-10-30 | 北方激光研究院有限公司 | DBS wind field scanning method capable of changing scanning included angle |
| CN115508580A (en) * | 2022-11-16 | 2022-12-23 | 中国海洋大学 | Airport runway virtual air rod construction method based on laser remote sensing technology |
| CN115508865A (en) * | 2022-10-17 | 2022-12-23 | 上海能源科技发展有限公司 | Wind field inversion method and system based on coherent Doppler continuous wave laser radar |
| CN117420569A (en) * | 2023-12-19 | 2024-01-19 | 南京牧镭激光科技股份有限公司 | Inversion method of non-uniform wind field based on Doppler laser wind finding radar |
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| CN111475942A (en) * | 2020-04-03 | 2020-07-31 | 上海电气风电集团股份有限公司 | Wind resource quality evaluation method, system, medium, and electronic device |
| CN111505596A (en) * | 2020-04-16 | 2020-08-07 | 北京理工大学重庆创新中心 | Three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology |
| CN111505596B (en) * | 2020-04-16 | 2022-05-13 | 北京理工大学重庆创新中心 | Three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology |
| CN111562081A (en) * | 2020-04-30 | 2020-08-21 | 成都英鑫光电科技有限公司 | Flow field testing method and device, electronic equipment and computer readable storage medium |
| CN111624623A (en) * | 2020-06-02 | 2020-09-04 | 青岛镭测创芯科技有限公司 | Wind field inversion method based on laser radar non-uniform scanning |
| CN111624623B (en) * | 2020-06-02 | 2023-03-10 | 青岛镭测创芯科技有限公司 | Wind field inversion method based on laser radar non-uniform scanning |
| CN111856511A (en) * | 2020-07-07 | 2020-10-30 | 北方激光研究院有限公司 | DBS wind field scanning method capable of changing scanning included angle |
| CN115508865A (en) * | 2022-10-17 | 2022-12-23 | 上海能源科技发展有限公司 | Wind field inversion method and system based on coherent Doppler continuous wave laser radar |
| CN115508580A (en) * | 2022-11-16 | 2022-12-23 | 中国海洋大学 | Airport runway virtual air rod construction method based on laser remote sensing technology |
| CN115508580B (en) * | 2022-11-16 | 2023-03-24 | 中国海洋大学 | Airport runway virtual air rod construction method based on laser remote sensing technology |
| CN117420569A (en) * | 2023-12-19 | 2024-01-19 | 南京牧镭激光科技股份有限公司 | Inversion method of non-uniform wind field based on Doppler laser wind finding radar |
| CN117420569B (en) * | 2023-12-19 | 2024-03-12 | 南京牧镭激光科技股份有限公司 | Inversion method of non-uniform wind field based on Doppler laser wind finding radar |
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