CN109324335A - A kind of method and system based on laser radar identification wind shear - Google Patents
A kind of method and system based on laser radar identification wind shear Download PDFInfo
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- CN109324335A CN109324335A CN201811542782.6A CN201811542782A CN109324335A CN 109324335 A CN109324335 A CN 109324335A CN 201811542782 A CN201811542782 A CN 201811542782A CN 109324335 A CN109324335 A CN 109324335A
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- 238000001514 detection method Methods 0.000 claims abstract description 43
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- 238000004590 computer program Methods 0.000 claims description 6
- 230000008520 organization Effects 0.000 claims description 6
- 238000003908 quality control method Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 2
- 238000004422 calculation algorithm Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
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Classifications
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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
Abstract
The present invention relates to a kind of method and systems based on laser radar identification wind shear, this method comprises: the radial velocity field detection data on the glide path that acquisition laser radar obtains in real time with airfield runway periphery；Radial velocity field detection data is handled, glide path Wind outline is obtained；The wind shear information of glide path Wind outline is identified by wavelet transformation.The embodiment of the present invention carries out wind shear identification using wavelet transformation, not only accuracy rate is high, but also greatly reduces calculating cost by the radial velocity field detection data on the glide path of acquisition laser radar acquisition in real time with airfield runway periphery.
Description
Technical field
The present invention relates to atmospheric science technical field more particularly to it is a kind of based on laser radar identification wind shear method and
System.
Background technique
Currently, the most countries such as U.S. mainly use the low-level wind shear early warning system (Low based on ground wind sensor
Level Wind shear Alert System, LLWAS) carry out traffic pattern wind shear detection and early warning.Due to LLWAS
It is weaker to the detectivity of high-altitude wind field based on ground transaucer, lack authenticity and the data precision.It is main with the U.S.
It is different that wind shear is led to by the weather system of large scale, and the airport of China certain areas is by quick and various small scale
The puzzlement of orographic winds not can effectively solve wind shear existing for puzzlement China airport using LLWAS system and identify problem.
Summary of the invention
It is a kind of based on laser radar identification the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide
The method and system of wind shear.
The technical scheme to solve the above technical problems is that a kind of side based on laser radar identification wind shear
Method, comprising:
Radial velocity field detection data on the glide path that acquisition laser radar obtains in real time with airfield runway periphery, it is described to swash
Optical radar is deployed in the middle section of the airfield runway, and the elevation angle is identical as the gradient of the glide path；
The radial velocity field detection data is handled, glide path Wind outline is obtained；
The wind shear information of the glide path Wind outline is identified by wavelet transformation.
The beneficial effects of the present invention are: passing through the radial velocity field on the glide path for acquiring acquisition in real time with airfield runway periphery
Detection data carries out wind shear identification using wavelet transformation, and not only accuracy rate is high, but also greatly reduces calculating cost.And this
Invention is different from existing wind shear recognition methods, is mainly based upon the Main change trend of diameter aweather.
Based on the above technical solution, the present invention can also be improved as follows.
Further, it is handled to the radial velocity field detection data, before obtaining glide path Wind outline, the side
Method further include:
Quality control is carried out to the radial velocity field detection data in each range gate, removal can not letter data.
Further, the radial velocity field detection data in each range gate carries out quality control, removes insincere
Information, comprising:
When the miss rate of the radial velocity field detection data in same range gate is more than default ratio, it is determined that the range gate
And the data of farther range gate are insincere and removed.
Beneficial effect using above-mentioned further scheme is: since laser radar has certain investigative range, this property
There can be biggish uncertainty by the objective influence of weather and atmosphere pollution situation.The remoter return signal of distance is weaker, swashs
Optical radar is difficult to, to often there is more scarce measuring point, has the point of measurement data to also tend to by noise jamming, no at this time
It is credible again, it therefore, can be to laser radar by judging whether the miss rate of data in same range gate is more than default ratio
Actual detection range carries out Dynamic Recognition, with effectively remove can not letter data.
Further, described that the radial velocity field detection data is handled, obtain glide path Wind outline, comprising:
The wave beam radial direction wind speed and direction observed result near glide path, interpolation will be located in the radial velocity field detection data
Obtain the radial wind speed and direction information of the glide path；
Inversion procedure is carried out to the radial velocity field detection data using VAD method, obtains the crosswind information of glide path；
According to the radial wind speed and direction information of glide path and the crosswind information of glide path, glide path Wind outline is obtained.
Beneficial effect using above-mentioned further scheme is: aweather directly observing head/a tail wind of glide path using diameter, exempts
The error of complicated inversion algorithm and introducing, and substantially increase calculating speed；In combination with VAD method inverting glide path
Crosswind, the shortcomings that compensating for diameter aweather algorithm cannot observe crosswind.
Further, the wind shear information includes wind shear region, then described by wavelet transformation, described in identification
The wind shear information of glide path Wind outline, comprising:
Identify the main feature point of the glide path Wind outline using Haar wavelet transformation, and by the glide path Wind outline
Main feature point, the boundary as the wind shear region.
Beneficial effect using above-mentioned further scheme is: carrying out wind shear identification using wavelet transformation, improves identification
Accuracy rate, while reducing calculating cost.
Further, the wind shear information further includes wind shear intensity, the method also includes:
According to the wind shear strength criterion of the wind shear intensity and International Civil Aviation Organization ICAO, publication alarm is determined
Region warning message corresponding with the region.
Beneficial effect using above-mentioned further scheme is: can find in time wind shear and issue alarm, to reduce
Loss.
Further, the wind shear intensity scale according to the wind shear intensity and International Civil Aviation Organization ICAO
Standard determines the region warning message corresponding with the region of publication alarm, comprising:
According to the wind shear strength criterion of the ICAO and the wind shear intensity, each region on the glide path is judged
Interior wind shear grade, described each region are obtained by dividing the glide path as unit of 1 nautical mile；
Wind shear grade is identified in the region of moderate ratings above；
Single zone alarm is issued for each region of mark, and including in the corresponding warning message in each region should
Wind shear maximum intensity value in region.
Using the beneficial effect of above-mentioned further scheme is: providing succinct but effective wind shear information for pilot, side
Just pilot copes in time.
The another technical solution that the present invention solves above-mentioned technical problem is as follows: one kind identifying wind shear based on laser radar
Device, comprising:
Memory, for storing computer program；
Processor is realized as described in the above technical scheme based on laser radar knowledge for executing the computer program
The method of other wind shear.
The another technical solution that the present invention solves above-mentioned technical problem is as follows: one kind identifying wind shear based on laser radar
System, comprising:
Laser radar, the laser radar are deployed in the middle section of airfield runway, and the elevation angle is identical as the gradient of glide path, use
In the radial velocity field detection data on acquisition glide path with airfield runway periphery；
Device based on laser radar identification wind shear described in above-mentioned technical proposal, for being obtained to the laser radar
Radial velocity field detection data handled, identify glide path on wind shear information.
The beneficial effects of the present invention are: passing through on the glide path of acquisition laser radar acquisition in real time and airfield runway periphery
Radial velocity field detection data carries out wind shear identification using wavelet transformation, and not only accuracy rate is high, but also greatly reduces and be calculated as
This.
The another technical solution that the present invention solves above-mentioned technical problem is as follows: a kind of storage medium, the storage medium
In be stored with instruction, when computer reads described instruction, the computer is made to execute as described in the above technical scheme be based on
The method of laser radar identification wind shear.
The additional aspect of the present invention and its advantages of will be set forth in part in the description, partially will be from following description
In become obvious, or practice is recognized through the invention.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to the embodiment of the present invention or the prior art
Attached drawing needed in description is briefly described, it should be apparent that, drawings described below is only of the invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of flow diagram of method that wind shear is identified based on laser radar provided in an embodiment of the present invention；
Fig. 2 be another embodiment of the present invention provides it is a kind of based on laser radar identify wind shear method process signal
Figure；
Fig. 3 be another embodiment of the present invention provides it is a kind of based on laser radar identify wind shear method process signal
Figure；
Fig. 4 be another embodiment of the present invention provides it is a kind of based on laser radar identify wind shear method process signal
Figure；
Fig. 5 be another embodiment of the present invention provides it is a kind of based on laser radar identify wind shear method process signal
Figure；
Fig. 6 is that an a kind of wind shear of method that wind shear is identified based on laser radar provided in an embodiment of the present invention is known
The schematic diagram of other result.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
A kind of method 100 based on laser radar identification wind shear as shown in Figure 1, comprising:
110, the radial velocity field detection data on the glide path that acquisition laser radar obtains in real time and airfield runway periphery.Its
In, laser radar is deployed in the middle section of airfield runway, and the elevation angle is identical as the gradient of glide path.
120, radial velocity field detection data is handled, obtains glide path Wind outline.
130, the wind shear information of glide path Wind outline is identified by wavelet transformation.
Specifically, in this embodiment, laser radar is deployed in airfield runway middle section adjacent locations, using with glide path slope
Identical 3 ° of elevations angle are spent, periodically periphery is scanned or 360 ° of PPI are scanned, such as: the one group of PPI of completion in every 2 minutes
Scanning, obtains PPI scan data.PPI scan data includes: radial wind speed and direction information and airfield runway periphery on glide path
Radial velocity field information.
A kind of method based on laser radar identification wind shear provided in above-described embodiment: by acquiring laser thunder in real time
With the radial velocity field detection data on airfield runway periphery on up to the glide path of acquisition, wind shear identification is carried out using wavelet transformation,
Not only accuracy rate is high, but also greatly reduces calculating cost.
It should be understood that in this embodiment, wind shear information includes wind shear region, and step 140 is specifically as follows: using
Haar wavelet transformation identifies the main feature point of glide path Wind outline, and by the main feature of glide path Wind outline point, as wind
The boundary in shear region.
Specifically, identifying the main feature point of Wind outline using Haar wavelet transformation.Wavelet transformation passes through building one
Wavelet function h calculates profile and the function out of from height lower limit zb to upper height limit zt, the product on each height point
Accumulated value W.
W is practical calculate be by height for the point of b centered on, the gradient of the average value of the part of each a/2 width up and down, from
And the extreme value of Signal gradient shows as peak (paddy) value of small echo signal.By reasonably being adjusted to width a, wavelet transformation can
Effectively to filter off the high and low frequency fluctuation of signal, to only retain specific wavelength section of the wave crest half width near a
Wave portion.
Wherein, the main feature point of glide path Wind outline is main wave crest/wave trough position in whole profile, has been excluded
Lie prostrate too small Wave crest and wave trough and relatively secondary Wave crest and wave trough.
Due to the wave crest and trough that main feature point is the glide path main fluctuation of Wind outline end to end, two neighboring main spy
Sign point is necessarily respectively Wave crest and wave trough, then the wind speed variation between adjacent two characteristic point can be considered monotone variation on the whole, is changed
The positive and negative property of the wind shear of the point-to-point transmission of speech is considered to be consistent.Therefore, poor by calculating the wind speed of adjacent characteristic point, divided by
Wind shear intensity can be obtained in distance.
By wavelet transformation, the main feature point of glide path Wind outline is identified, and then as wind shear region
Boundary.
Specifically, in this embodiment, being based on small wave converting method, obtaining wind profile by three-wheel recognizer
Main Wave crest and wave trough.
1, Wave crest and wave trough recognizer
By wavelet transformation, the Wave crest and wave trough of signal is close to 0 value in small echo signal, and the extreme value place of signal variability exists
Wave crest and trough are shown as in small echo signal.It is possible thereby to determine the position of signal wave crest trough.
2, secondary point filter algorithm
For the Wave crest and wave trough identified in 1, have the following problems:
(1) small fluctuation is still had under wind field steady state, the amplitude of Wave crest and wave trough is too small at this time, belongs to unessential wind
Speed fluctuation.
(2) in primary big fluctuations in wind speed there may be some small fluctuations, recognition result is by the wave crest of these minor swings
Trough is identified as characteristic point, causes isolating for great fluctuation process, weakens intensity significantly.
Thus need to be added the filter algorithm of secondary point, with the main fluctuations in wind speed information of protrusion.
This filter algorithm uses recognition result composition profile in 1 to carry out again peak valley identification, and secondary point is carried out in pairs
Removal, prominent main feature point position.The problem of making in 2 (2), is preferably solved.
3, amplitude filter algorithm
In order to further solve the problems, such as in 2 (1), it is also added into amplitude filter algorithm, by amplitude lower than certain threshold value
Two neighboring characteristic point removes simultaneously from characteristic point sequence.
As shown in fig. 6, being a wind shear recognition result.Abscissa is aircraft altitude, and ordinate is wind speed, block curve
For wind end to end, it is positive with intermittent headache；Dashed curve is crosswind, carrys out wind with left side and is positive.
The glide path gradient is 3 degree, to can calculate the distance of distance landing by height, 3 whole nautical mile of areas are divided into figure
Domain.It is a whole nautical mile of region (2Nmile) in filament box.
By Wavelet Transformation Algorithm, the main feature point (peak valley) on Wind outline (block curve) end to end can be identified,
Solid roundlet as in figure.To the region calculation of wind speed gradient that two neighboring characteristic point surrounds, as wind shear intensity.Work as intensity
When being above standard, which is wind shear region (thick line box).
By taking this figure as an example, it is seen that there are the wind shear regions that an intensity is -4.3, span 2 nautical miles and 3 nautical miles two
Alarm region, at this time alarm are as follows: 3 nautical miles, wind shear -4.3；2 nautical miles, wind shear -4.3.
Optionally, as one embodiment, as shown in Fig. 2, before step 120, method 100 further include:
140, quality control is carried out to the radial velocity field detection data in each range gate, removal can not letter data.
Then, step 120 specifically: to eliminate can not the radial velocity field detection data of letter data handle, obtain down
Slideway Wind outline.
Specifically, in this embodiment, when the miss rate of the radial velocity field detection data in same range gate is more than default
When ratio, it is determined that the data of the range gate and farther range gate are insincere and removed.
For example, if the miss rate of the radial velocity field detection data in same range gate be more than 50% perhaps 60% or also
It can be other ratios, then the shortage of data rate in the range gate is excessively high, insincere, need to be by the range gate, and than the distance
Data in the farther range gate of door are removed.Such as: 2500 meters of range gate miss rates of discovery are excessively high, then from 2500 meters to farther
All data of distance think insincere.
Optionally, in another embodiment, as shown in figure 3, step 120 may include:
121, the wave beam radial direction wind speed and direction observed result near glide path, interpolation will be located in radial velocity field detection data
Obtain the radial wind speed and direction information of glide path.
122, inversion procedure is carried out to radial velocity field detection data using VAD method, obtains the crosswind information of glide path.
123, according to the radial wind speed and direction information of glide path and the crosswind information of glide path, glide path Wind outline is obtained.
Specifically, in this embodiment, glide path Wind outline includes: head/a tail wind and crosswind, wherein head/a tail wind is divided into again
Intermittent headache and a tail wind respectively refer to wind and blow from head/tail.Aweather algorithm can more directly obtain the information of wind end to end to diameter,
But vad algorithm is needed to assist obtaining crosswind.
When calculating glide path Wind outline, since wind speed and direction has corresponding location information, near glide path
Wind speed and direction distribution, interpolation obtain the wind speed and direction value on glide path.The disadvantages of this method is to be unable to get the side of glide path
Therefore wind information handles PPI scan data using VAD method simultaneously in the embodiment of the present invention, by obtained wind vector along downslide
Road is decomposed, crosswind information of the beam wind component as glide path.
VAD method is the common method of current laser radar WIND FIELDS.This method assumes that the wind field on sustained height
Uniformly, if wind speed is V (H), wind direction is θ (H), for the wave beam of azimuth angle alpha, it is known that radial velocity VrAre as follows:
Vr=V (H) * sin (α-θ (H))
Therefore in 360 ° of PPI scan data, sine curve form should be presented in the radial velocity on same distance door.It is logical
It crosses SIN function to be fitted, amplitude V (H) and phase theta (H) can be obtained.
VAD method can only obtain unique wind speed and direction for each height layer as a result, can be used in embodiments of the present invention
In the crosswind component of offer glide path wind field.
Head/a tail wind for aweather directly observing glide path in the present embodiment using diameter, eliminate complicated inversion algorithm and
The error of introducing, and substantially increase calculating speed；In combination with the crosswind of VAD method inverting glide path, diameter is compensated for aweather
Algorithm cannot observe the shortcomings that crosswind.
It should be understood that also may include step 140 before step 121 in this example.Then in step 121 specifically:
To eliminate can not be in the radial velocity field detection data of letter data, and the wave beam radial direction wind speed and direction on glide path is interpolated into glide path
On, the radial wind speed and direction information as glide path.Step 12 specifically: using VAD method to eliminate can not letter data
Radial velocity field detection data carries out inversion procedure, obtains the crosswind information of glide path.
Optionally, in another embodiment, as shown in figure 4, method 100 can also include:
150, according to wind shear intensity and International Civil Aviation Organization ICAO (International Civil Aviation
Organization wind shear strength criterion) determines the region warning message corresponding with the region of publication alarm.
Specifically, in this embodiment, as shown in figure 5, step 150 may include:
151, according to the wind shear strength criterion of ICAO and wind shear intensity, judge that the wind on glide path in each region is cut
Become grade, each region is obtained by dividing the glide path as unit of 1 nautical mile；
152, wind shear grade is identified in the region of moderate ratings above；
153, single zone alarm is issued for each region of mark, and is wrapped in the corresponding warning message in each region
Include wind shear maximum intensity value in the region.
Specifically, in this embodiment, warning information can also include wind shear type etc..Wherein, wind shear type packet
Include wind shear (wind shear), turbulent flow (turbulence) and downburst (downburst), wherein downburst needs
The simultaneous observation of terminal doppler weather radar carries out identification judgement.Furthermore it is also possible to will be by wind shear alarm according to wind shear
Time carries out storage record.
Pilot needs to obtain the intensity and location information of wind shear when landing, but aircraft landing process only 1-2 minutes,
Pilot can not handle whole wind shear identification informations.Therefore international way is that glide path is divided into several regions,
To alarm of the strongest wind shear as this region is only provided in each region, such pilot only needs to handle several regions
Alarm, and can satisfy its demand to wind shear position.
For example, glide path is divided into 3 regions with 1 nautical mile for unit, single zone alarm is issued to each region, is
Wind shear maximum intensity value in the region.Each whole nautical mile of region refers to whole nautical mile of glide path region.Wind shear region is above
The region between two adjacent characteristic points mentioned.For example, when the start-stop in a wind shear region is (1.2,2.3) nautical mile, this
When the region span two whole nautical mile of regions.And it in a whole nautical mile of region may include multiple wind shear regions or one portion
Point, wherein highest wind shear intensity is used only to this whole nautical mile of region at this time and issues a single zone alarm.For example,
May there are 2 grades, 2 grades, 3 grades, 2 grades of four wind shear regions in 1 nautical mile of region, issuing alarm at this time is 1 nautical mile of region wind shear 3
Grade.
A kind of method based on laser radar identification wind shear provided in above-described embodiment, by using Laser Measuring wind and thunder
Up to aircraft glide path and airport periphery wind field carry out continue detection, can under higher spatial and temporal resolution real-time detection target
The wind field information of areas adjacent, so as to find wind shear in time and issue alarm.
It should be understood that can also be specially in the above-described embodiments step including step 140 or step 120 page
121-123, succinct for description, details are not described herein.
It should also be understood that magnitude of the sequence numbers of the above procedures are not meant to hold in the various embodiments described above of the invention
Row sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, without coping with the embodiment of the present invention
Implementation process constitutes any restriction.
Above in association with Fig. 1 to Fig. 5, to a kind of method based on laser radar identification wind shear provided in an embodiment of the present invention
It is described in detail, below to a kind of system progress based on laser radar identification wind shear provided in an embodiment of the present invention
Detailed description.
The present invention also provides a kind of devices based on laser radar identification wind shear, comprising:
Memory, for storing computer program；
Processor realizes identifying based on laser radar such as any one of above-described embodiment for executing computer program
The method of wind shear.
It should be noted that the present embodiment is product embodiments corresponding with above-mentioned each method embodiment, for this implementation
In example the explanation of the concrete function of each structure and optional embodiment can with reference in above-mentioned each method embodiment pair it should be noted that
Details are not described herein.
In addition, the system includes: laser radar the present invention also provides a kind of system based on laser radar identification wind shear
With the device based on laser radar identification wind shear of such as above-described embodiment.Wherein,
Laser radar is deployed in the middle section of airfield runway, and the elevation angle is identical as the gradient of glide path, for periodically into
Row scanning or 360 ° of PPI scanning, obtain the radial velocity field detection data on glide path with airfield runway periphery.Based on laser thunder
Up to the device of identification wind shear, the radial velocity field detection data for obtaining to laser radar is handled, and is identified on glide path
Wind shear information.
For example, laser radar can complete one group of PPI scanning with every 2 minutes.
It should be noted that the present embodiment is system embodiment corresponding with above-mentioned apparatus embodiment, for the present embodiment
In based on laser radar identification wind shear the concrete function of device and the explanation of optional embodiment can refer to above-mentioned each side
In method embodiment pair it should be noted that details are not described herein.
A kind of system based on laser radar identification wind shear provided in above-described embodiment: by acquiring laser thunder in real time
With the radial velocity field detection data on airfield runway periphery on up to the glide path of acquisition, wind shear identification is carried out using wavelet transformation,
Not only accuracy rate is high, but also greatly reduces calculating cost.
In other embodiments of the invention, a kind of storage medium is also provided, instruction is stored in the storage medium, works as meter
It calculates machine-readable when taking the instruction, computer is made to execute the side based on laser radar identification wind shear such as any one of above-described embodiment
Method.
In addition, the terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates may exist
Three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.Separately
Outside, character "/" herein typicallys represent the relationship that forward-backward correlation object is a kind of "or".
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of method based on laser radar identification wind shear characterized by comprising
Radial velocity field detection data on the glide path that acquisition laser radar obtains in real time with airfield runway periphery, the laser thunder
Up to the middle section for being deployed in the airfield runway, the elevation angle is identical as the gradient of the glide path；
The radial velocity field detection data is handled, glide path Wind outline is obtained；
The wind shear information of the glide path Wind outline is identified by wavelet transformation.
2. the method according to claim 1 based on laser radar identification wind shear, which is characterized in that the radial direction
Wind measurement data are handled, before obtaining glide path Wind outline, the method also includes:
Quality control is carried out to the radial velocity field detection data in each range gate, removal can not letter data.
3. it is according to claim 2 based on laser radar identification wind shear method, which is characterized in that it is described to it is each away from
Quality control is carried out from the radial velocity field detection data on door, removal can not letter information, comprising:
When the miss rate of the radial velocity field detection data in same range gate is more than default ratio, it is determined that the range gate and more
The data of remote door are insincere and removed.
4. the method according to any one of claim 1-3 based on laser radar identification wind shear, which is characterized in that institute
It states and the radial velocity field detection data is handled, obtain glide path Wind outline, comprising:
The wave beam radial direction wind speed and direction observed result near glide path will be located in the radial velocity field detection data, interpolation obtains
The radial wind speed and direction information of the glide path；
Inversion procedure is carried out to the radial velocity field detection data using VAD method, obtains the crosswind information of glide path；
According to the radial wind speed and direction information of glide path and the crosswind information of glide path, glide path Wind outline is obtained.
5. the method according to any one of claim 1-3 based on laser radar identification wind shear, which is characterized in that institute
Stating the wind shear information includes wind shear region, then described by wavelet transformation, identifies that the wind of the glide path Wind outline is cut
Become information, comprising:
Identify the main feature point of the glide path Wind outline using Haar wavelet transformation, and by the master of the glide path Wind outline
Characteristic point is wanted, the boundary as the wind shear region.
6. the method according to any one of claim 1-3 based on laser radar identification wind shear, which is characterized in that institute
Stating wind shear information further includes wind shear intensity, the method also includes:
According to the wind shear strength criterion of the wind shear intensity and International Civil Aviation Organization ICAO, the area of publication alarm is determined
Domain warning message corresponding with the region.
7. the method according to claim 6 based on laser radar identification wind shear, which is characterized in that described according to
The wind shear strength criterion of wind shear intensity and International Civil Aviation Organization ICAO determines the region and the region pair of publication alarm
The warning message answered, comprising:
According to the wind shear strength criterion of the ICAO and the wind shear intensity, judge on the glide path in each region
Wind shear grade, described each region are obtained by dividing the glide path as unit of 1 nautical mile away from runway end distance；
Wind shear grade is identified in the region of moderate ratings above；
Single zone alarm is issued for each region of mark, and includes the region in the corresponding warning message in each region
Middle wind shear maximum intensity value.
8. a kind of device based on laser radar identification wind shear, which is characterized in that
Memory, for storing computer program；
Processor, for executing the computer program, realize as described in any one of claims 1 to 7 based on laser thunder
Up to the method for identification wind shear.
9. a kind of system based on laser radar identification wind shear characterized by comprising
Laser radar, the laser radar are deployed in the middle section of airfield runway, and the elevation angle is identical as the gradient of glide path, for obtaining
It takes on the glide path and the radial velocity field detection data on the airfield runway periphery；
Device as claimed in claim 8 based on laser radar identification wind shear, the institute for being obtained to the laser radar
It states radial velocity field detection data to be handled, identifies the wind shear information on glide path.
10. a kind of storage medium, which is characterized in that instruction is stored in the storage medium, when computer reads described instruction
When, so that the computer is executed the method based on laser radar identification wind shear as described in any one of claims 1 to 7.
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| CN115494521B (en) * | 2022-09-22 | 2023-08-22 | 中国民航大学 | Airport runway low-altitude wind shear early warning method based on laser radar |
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