CN112068140A - Airborne phased array meteorological radar scanning method and device and airborne phased array meteorological radar - Google Patents
Airborne phased array meteorological radar scanning method and device and airborne phased array meteorological radar Download PDFInfo
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- CN112068140A CN112068140A CN202010950778.4A CN202010950778A CN112068140A CN 112068140 A CN112068140 A CN 112068140A CN 202010950778 A CN202010950778 A CN 202010950778A CN 112068140 A CN112068140 A CN 112068140A
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/95—Radar or analogous systems specially adapted for specific applications for meteorological use
- G01S13/953—Radar or analogous systems specially adapted for specific applications for meteorological use mounted on aircraft
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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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 embodiment of the disclosure provides an airborne phased array meteorological radar scanning method and device and an airborne phased array meteorological radar, belonging to the technical field of radar and comprising the following steps: determining the current flight height of the aircraft; determining a first scanning parameter of the first scanning according to the flying height; scanning a foresight area of the carrier according to a first scanning parameter to obtain meteorological cloud cluster distribution in the foresight area; searching a target meteorological cloud cluster needing secondary scanning from all meteorological cloud cluster distributions; determining a second scanning parameter corresponding to the target meteorological group area according to the flying height and the azimuth parameter of the target meteorological cloud group, wherein the first pitch scanning interval is greater than the second pitch scanning interval, and the first pitch scanning number is less than the second pitch scanning number; and scanning the target meteorological cloud cluster according to the second scanning parameters to obtain meteorological reflectivity three-dimensional data of the target meteorological cloud cluster. The detection perception and the display capability of the airborne meteorological radar to the weather are improved, the flight safety can be further improved, and unnecessary yawing is reduced.
Description
Technical Field
The disclosure relates to the technical field of radars, in particular to an airborne phased array meteorological radar scanning method and device and an airborne phased array meteorological radar.
Background
Airborne weather radar is used for surveying the meteorological information in aircraft the place ahead, the guide pilot avoids influencing the meteorological affairs of flight safety in advance, traditional airborne weather radar adopts the single file scanning, it is directional that the flight in-process needs the frequent manual regulation wave beam of pilot, carry out meteorological target's discernment and threat judgement according to the experience, along with the development of aviation cause, require meteorological radar can have more powerful detection ability to threaten flight safety's meteorological affairs, can give the pilot more accurate voluntarily, abundant information display, the suggestion that possesses meteorological spatial structure demonstration and threaten nature will further improve flight safety, reduce unnecessary driftage.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide an airborne phased array meteorological radar scanning method and apparatus, and an airborne phased array meteorological radar, which at least partially solve the problems in the prior art.
In a first aspect, an embodiment of the present invention provides a method for recording scanning of a phased array weather radar, which is applied to an airborne aircraft of the phased array weather radar, and the method includes:
determining the current flight altitude of the aircraft;
determining first scanning parameters of first scanning according to the flying height, wherein the first scanning parameters at least comprise a first pitching scanning center, a first pitching scanning interval, a first azimuth scanning interval and a first pitching scanning number;
scanning a forward-looking area of the carrier according to the first scanning parameters to obtain the meteorological cloud cluster distribution in the forward-looking area;
searching a target meteorological cloud cluster needing secondary scanning from all the meteorological cloud cluster distributions;
determining a second scanning parameter corresponding to the target meteorological cloud area according to the flying height and the azimuth parameter of the target meteorological cloud, wherein the second scanning parameter at least comprises a second pitching scanning center, a second pitching scanning interval, a second azimuth scanning interval and a second pitching scanning number, the first pitching scanning interval is larger than the second pitching scanning interval, and the first pitching scanning number is smaller than the second pitching scanning number;
and scanning the target meteorological cloud cluster according to the second scanning parameters to obtain meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data at least comprises an azimuth, a distance and a height.
Optionally, the second pitch scan center coincides with the first scan pitch scan center;
the value range of the second pitch scanning interval is 0.25 to 0.5 degrees;
the value range of the second azimuth scanning interval is 0.25 to 0.5 degrees;
the value range of the second pitch scanning number is 10 to 20.
Optionally, the step of scanning a forward-looking area of the aircraft according to the first scanning parameter to obtain the weather cloud cluster distribution in the forward-looking area includes:
scanning a forward-looking area of the carrier according to the first scanning parameters to obtain the reflectivity of all distance units in the forward-looking area;
screening out a target distance unit with the reflectivity larger than a reflectivity threshold;
and determining the meteorological cloud cluster distribution according to all the target distance units.
Optionally, the step of searching for the target weather cloud needing the secondary scanning from all the weather cloud distributions includes:
calculating the distribution coverage area of each meteorological cloud cluster according to the mass center, the azimuth range and the distance range of each meteorological cloud cluster;
and screening the meteorological cloud cluster with the coverage area larger than the area threshold as the target meteorological cloud cluster.
Optionally, after the step of scanning the target weather cloud according to the second scanning parameter, the method includes:
determining the priority of each target meteorological cloud cluster according to the reflectivity and the position of each target meteorological cloud cluster;
according to the sequence of the priorities of all the target meteorological clouds from high to low, screening the target meteorological clouds with the priorities higher than a preset value;
and scanning the target meteorological clouds with the priority higher than the preset value in sequence according to the second scanning parameters.
Optionally, after the step of obtaining the meteorological reflectivity stereo data of the target meteorological cloud, the method further includes:
extracting the meteorological reflectivity three-dimensional data characteristics of the target meteorological cloud cluster according to the meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data characteristics comprise the strongest reflectivity height, the centroid height, the meteorological bottom height and the meteorological top height;
judging whether the weather reflectivity three-dimensional data characteristics meet the weather threatening marking condition or not;
and if the weather reflectivity three-dimensional data characteristics reach the marking conditions threatening weather, marking early warning.
Optionally, the step of determining whether the weather reflectivity stereo data feature meets a weather threat marking condition includes:
judging whether the meteorological reflectivity three-dimensional data characteristics reach a preset threatened meteorological threshold value or not, and if so, determining that the marking conditions of threatened meteorological are reached; alternatively, the first and second electrodes may be,
the method is characterized in that the step of judging whether the weather reflectivity three-dimensional data features meet the weather threat marking conditions comprises the following steps:
determining the estimated weather type of the target weather cloud cluster according to the three-dimensional data characteristics of the weather reflectivity;
judging whether the estimated weather type is a threatening weather type;
and if the estimated weather type is a threatening weather type, determining that the marking condition of the threatening weather is met.
In a second aspect, an embodiment of the present invention further provides an airborne phased array weather radar scanning apparatus, which is applied to an airborne aircraft of a phased array weather radar, and the method includes:
the first determining module is used for determining the current flight height of the aircraft;
the second determining module is used for determining first scanning parameters of the first scanning according to the flying height, wherein the first scanning parameters at least comprise a first pitch angle center, a first pitch scanning range and a first scanning interval;
the first acquisition module is used for scanning a forward-looking area of the aircraft according to the first scanning parameters to obtain the meteorological cloud cluster distribution in the forward-looking area;
the searching module is used for searching a target meteorological cloud cluster needing secondary scanning from all the meteorological cloud cluster distributions;
a third determining module, configured to determine a second scanning parameter corresponding to the target meteorological cloud area according to the flying altitude and the azimuth parameter of the target meteorological cloud, where the second scanning parameter at least includes a second pitch angle center, a second pitch scanning range, and a second scanning interval, the first scanning interval is greater than the second scanning interval, and the first pitch scanning range is greater than the second pitch scanning range;
and the second acquisition module is used for scanning the target meteorological cloud cluster according to the second scanning parameters to acquire meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data at least comprises an azimuth, a distance and a height.
In a third aspect, an embodiment of the present invention further provides an airborne phased array weather radar, including a radar body and a processor, where the processor is configured to execute the scanning method of the airborne phased array weather radar according to any one of the first aspect.
Aiming at the problems that the traditional airborne weather radar has a single scanning mode, insufficient display information and no weather threat assessment capability, the invention designs an airborne phased array weather radar automatic scanning and threat assessment method, on the basis of meeting the original weather detection function, the characteristic of rapid beam change of the phased array radar is utilized to increase the weather fine detection on a gravity area, realize the weather threat assessment, mark weather seriously threatening the flight safety in a display picture and remind a pilot to pay attention. The situation perception capability of meteorological phenomena in a large range in front of the airborne meteorological radar is guaranteed, the three-dimensional structure detection of the counterweight target is realized, the detection perception and display capability of the airborne meteorological radar to the meteorological phenomena is improved, the flight safety can be further improved, and unnecessary yawing is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of an airborne phased array meteorological radar scanning method according to an embodiment of the present invention;
fig. 2 to 5 are schematic process diagrams of an airborne phased array meteorological radar scanning method according to an embodiment of the present invention;
fig. 6 is a block diagram of an airborne phased array weather radar scanning device according to an embodiment of the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
Referring to fig. 1, a schematic flow chart is provided for recording a scanning method of a phased array weather radar according to an embodiment of the present invention, and the method is applied to an aircraft of the phased array weather radar. As shown in fig. 1, the method includes:
s101, determining the current flight height of the aircraft;
in the scanning method provided by this embodiment, one scanning cycle of the airborne weather radar includes a first large-scale coarse stereo scanning and a second key area fine stereo scanning, and the determination of the specific parameter is related to the current height of the airborne vehicle. When the scanning parameters are determined, the current flight height of the carrier is determined.
S102, determining first scanning parameters of first scanning according to the flying height, wherein the first scanning parameters at least comprise a first pitching scanning center, a first pitching scanning interval, a first azimuth scanning interval and a first pitching scanning number;
firstly, at the beginning of each scanning, determining the graphic parameters of the large-range coarse stereo scanning, wherein the large-range coarse stereo scanning comprises data of a plurality of pitching angles and covers all meteorological targets from the ground to the top of a convection layer. Wherein the setting of the elevation scanning angle is related to the flying height of the carrier and the beam width of the antenna.
Optionally, the first pitch scan center
Wherein HpAltitude, H, of a vehicle representing a phased array meteorological radarwDenotes the atmospheric zero-degree layer height, RTThe method comprises the steps of representing an airborne display range of the phased array meteorological radar;
the first pitching scanning interval is 0.8-1.2 times of the beam pitching width;
the first azimuth scanning interval is 0.3-1 degree;
the first pitch scanning number is 2 or 3.
The interval of the first pitching angle is related to the beam pitching width, and can be 0.8-1.2 times of the beam pitching width.
The first number of pitch angles is determined by the pitch range (greater than 8 degrees) and the pitch angle interval, and 2 or 3 can be selected.
The first azimuth interval is related to the radar waveform and the antenna scanning speed, and is usually 0.3 to 1 degree.
S103, scanning a forward-looking area of the aircraft according to the first scanning parameters to obtain the meteorological cloud cluster distribution in the forward-looking area;
optionally, the step of scanning a forward-looking area of the aircraft according to the first scanning parameter to obtain the weather cloud cluster distribution in the forward-looking area includes:
scanning a forward-looking area of the carrier according to the first scanning parameters to obtain the reflectivity of all distance units in the forward-looking area;
screening out a target distance unit with the reflectivity larger than a reflectivity threshold;
and determining the meteorological cloud cluster distribution according to all the target distance units.
S104, searching a target meteorological cloud cluster needing secondary scanning from all the meteorological cloud cluster distributions;
optionally, the step of searching for the target weather cloud needing the secondary scanning from all the weather cloud distributions includes:
calculating the distribution coverage area of each meteorological cloud cluster according to the mass center, the azimuth range and the distance range of each meteorological cloud cluster;
and screening the meteorological cloud cluster with the coverage area larger than the area threshold as the target meteorological cloud cluster.
The radar antenna transmits and receives electromagnetic waves according to a scanning pattern, for the received echo data of each frame, data preprocessing is firstly carried out, a distance unit of ground clutter distribution in the echo data is judged, the strength of the ground clutter distance unit is set to be zero, the influence of the ground clutter is removed, then a reflectivity factor is calculated according to the echo strength, after large-range coarse stereo scanning is completed, reflectivity data of a plurality of pitching angles are obtained and are marked as dBZData3[ N ]r][Na][Ne]In which N isr、NaAnd NeRespectively showing the number of the distance units, the number of the azimuth angles and the number of the pitching angles of the radar.
The pitch angle reflectivity data are fused and recorded as dBZData2[ Nr][Na]For dBZData2[ N ] greater than a certain reflectivity thresholdr][Na]And clustering the data in the direction dimension and the distance dimension to form a meteorological area, extracting characteristic data of the meteorological area, judging whether the meteorological area is a meteorological cloud cluster or not, and obtaining a meteorological cloud cluster distribution result in front of the carrier.
Establishing a meteorological target refined scanning list, and sequencing the scanning priority of the meteorological clouds according to the reflectivity intensity of the meteorological clouds and the relative position relationship between the meteorological clouds and the airplane.
S105, determining second scanning parameters corresponding to the target meteorological cloud area according to the flying height and the azimuth parameters of the target meteorological cloud, wherein the second scanning parameters at least comprise a second pitching scanning center, a second pitching scanning interval, a second azimuth scanning interval and a second pitching scanning number, the first pitching scanning interval is larger than the second pitching scanning interval, and the first pitching scanning number is smaller than the second pitching scanning number;
optionally, the second pitch scan center coincides with the first scan pitch scan center;
the value range of the second pitch scanning interval is 0.25 to 0.5 degrees;
the value range of the second azimuth scanning interval is 0.25 to 0.5 degrees;
the value range of the second pitch scanning number is 10 to 20.
And (3) for refined three-dimensional scanning data of the key area, judging ground clutter of each group of data, and calculating a reflectivity factor according to the echo intensity after ground clutter suppression is finished to form three-dimensional meteorological echo body structure data.
S106, scanning the target meteorological cloud cluster according to the second scanning parameters to obtain meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data at least comprise an azimuth, a distance and a height.
And extracting the stereo meteorological feature data, and then sending the feature data to a threat assessment module.
Optionally, after the step of scanning the target weather cloud according to the second scanning parameter, the method includes:
determining the priority of each target meteorological cloud cluster according to the reflectivity and the position of each target meteorological cloud cluster;
according to the sequence of the priorities of all the target meteorological clouds from high to low, screening the target meteorological clouds with the priorities higher than a preset value;
and scanning the target meteorological clouds with the priority higher than the preset value in sequence according to the second scanning parameters.
Optionally, after the step of obtaining the meteorological reflectivity stereo data of the target meteorological cloud, the method further includes:
extracting the meteorological reflectivity three-dimensional data characteristics of the target meteorological cloud cluster according to the meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data characteristics comprise the strongest reflectivity height, the centroid height, the meteorological bottom height and the meteorological top height;
judging whether the weather reflectivity three-dimensional data characteristics meet the weather threatening marking condition or not;
and if the weather reflectivity three-dimensional data characteristics reach the marking conditions threatening weather, marking early warning.
Optionally, the step of determining whether the weather reflectivity stereo data feature meets a weather threat marking condition includes:
judging whether the meteorological reflectivity three-dimensional data characteristics reach a preset threatened meteorological threshold value or not, and if so, determining that the marking conditions of threatened meteorological are reached; alternatively, the first and second electrodes may be,
the method is characterized in that the step of judging whether the weather reflectivity three-dimensional data features meet the weather threat marking conditions comprises the following steps:
determining the estimated weather type of the target weather cloud cluster according to the three-dimensional data characteristics of the weather reflectivity;
judging whether the estimated weather type is a threatening weather type;
and if the estimated weather type is a threatening weather type, determining that the marking condition of the threatening weather is met.
The threat assessment module analyzes and judges the type of the meteorological target or calculates the threat of the meteorological target by combining the characteristic information of the meteorological target and the flight parameters (height, course and the like) of the airplane, marks and warns the weather seriously threatening the flight safety, and reminds the pilot to pay attention.
The present invention will be described in further detail below with reference to fig. 2 to 5 by way of an embodiment.
The flying height 7000m of the carrier is assumed, the pitch angle width of the antenna is 3 degrees, the azimuth scanning range of the antenna is +/-60 degrees, and the radar display range is 80 km.
Firstly, designing large-range coarse stereo detection scanning parameters.
The pitch scan center and the scan range are related to the height of the carrier, and the design principle is that the scan area can cover the distribution height of a typical meteorological target. The height of the carrier is 7000m, the height of the atmosphere zero-degree layer is 4100m, the center of a pitch angle is-2 degrees, the scanning interval is 3 degrees, the pitch scanning range is 9 degrees, and the three pitch angles are respectively-5 degrees, -2 degrees and 1 degree. As shown in fig. 2 and 4(a), in order to improve the scanning efficiency, each scanning point is changed in the pitch dimension and the azimuth dimension at an interval of 0.5 degrees, and after the scanning at the three pitch angles is completed, the scanning pattern is repeated.
Secondly, data processing and reflectivity calculation are carried out.
The data processing adopts frame-by-frame processing, for each pitch angle echo data, firstly, the data is preprocessed, the distance units distributed by ground clutter in the echo data are judged, the intensity of the ground clutter distance units is set to zero, the influence of the ground clutter is removed, then, the reflectivity factor is calculated according to the echo intensity, after large-range coarse stereo scanning is finished, the reflectivity data of a plurality of pitch angles is obtained and is marked as dBZData3[ N ]r][Na][Ne]In which N isr、NaAnd NeRespectively representing the number of distance units, the number of azimuth angles, the number of pitch angles and N of the radare＝3。
Second, the data is fused.
Mix dBZData3[ N ]r][Na][Ne]Data are fused in the pitch dimension, reflectivity of three pitch angle echo data is selected according to the sequence of distance gate one by one, the data are fused into a line of data, after the whole azimuth operation is finished, a two-dimensional array is formed and is recorded as dBZData2[ N ]r][Na]。
Then, the meteorological cloud area is extracted.
For dBZData2[ N ]r][Na]Then, clustering the areas with reflectivity data larger than 30dBZ (medium threat), extracting the centroid distance, azimuth range and distance range of the meteorological area, calculating the area, using the meteorological area larger than the area threshold as a meteorological cloud cluster target, adding a refined scanning target list, wherein the area threshold can be set by referring to the size of a typical single thunderstorm, for example, 9 square seas.
Then, the meteorological area is finely scanned.
The extracted meteorological cloud cluster area is subjected to priority sequencing, the priority is related to the angle and the distance of the cloud cluster relative to the airplane and the reflectivity intensity of the cloud cluster, the closer the angle is to the course of the airplane, the higher the intensity is, the higher the priority of the target is, the finer scanning of the meteorological target is started according to the priority of a target finer scanning list, the azimuth scanning range is the target azimuth coverage range, the azimuth scanning interval is 0.5 degrees, the pitch scanning center and range are consistent with the coarse three-dimensional scanning, the pitch interval is reduced to 0.25 degrees, the vertical scanning is adopted in a scanning mode, the azimuth angle of a beam is changed after one vertical antenna line is completed, and the next line is scanned until the meteorological area is scanned, as shown in fig. 2 and fig. 4 (b).
Then, the stereo data processing is refined.
For refined three-dimensional data, ground clutter suppression is firstly completed, then reflectivity factors are calculated to form meteorological reflectivity three-dimensional data, and meteorological reflectivity three-dimensional data features including strongest reflectivity height, centroid height, meteorological bottom height and meteorological top height are extracted.
And finally, assessing the weather threat.
Threat assessment is carried out according to the meteorological body characteristic data, the type of the meteorological target is judged by comparing the meteorological target characteristic data with typical meteorological target type empirical characteristic data, if the meteorological target type is threat meteorological with serious threat to flight safety such as thunderstorm, hail and the like, marking early warning is carried out, and if the meteorological target type is threat meteorological identification, H is threat meteorological identification, and a pilot is reminded to pay attention.
Aiming at the problems that the traditional airborne weather radar has a single scanning mode, insufficient display information and no weather threat assessment capability, the invention designs an airborne phased array weather radar automatic scanning and threat assessment method, on the basis of meeting the original weather detection function, the characteristic of rapid beam change of the phased array radar is utilized to increase the weather fine detection on a gravity area, realize the weather threat assessment, mark weather seriously threatening the flight safety in a display picture and remind a pilot to pay attention. The situation perception capability of meteorological phenomena in a large range in front of the airborne meteorological radar is guaranteed, the three-dimensional structure detection of the counterweight target is realized, the detection perception and display capability of the airborne meteorological radar to the meteorological phenomena is improved, the flight safety can be further improved, and unnecessary yawing is reduced.
Referring to fig. 6, an embodiment of the present invention further provides an airborne phased array weather radar scanning apparatus, which is applied to an airborne aircraft of a phased array weather radar. As shown in fig. 6, the apparatus 60 includes:
a first determining module 601, configured to determine a current flight altitude of the aircraft;
a second determining module 602, configured to determine first scan parameters for a first scan according to the flying height, where the first scan parameters at least include a first pitch angle center, a first pitch scan range, and a first scan interval;
a first obtaining module 603, configured to scan a forward-looking area of the aircraft according to the first scanning parameter, and obtain a meteorological cloud cluster distribution in the forward-looking area;
a searching module 604, configured to search for a target weather cloud that needs to be scanned for the second time from all the weather cloud distributions;
a third determining module 605, configured to determine a second scanning parameter corresponding to the target meteorological cloud area according to the flying altitude and the azimuth parameter of the target meteorological cloud, where the second scanning parameter at least includes a second pitch angle center, a second pitch scanning range, and a second scanning interval, the first scanning interval is greater than the second scanning interval, and the first pitch scanning range is greater than the second pitch scanning range;
a second obtaining module 606, configured to scan the target weather cloud according to the second scanning parameter, and obtain weather reflectivity stereo data of the target weather cloud, where the weather reflectivity stereo data at least includes an azimuth, a distance, and a height.
In addition, the embodiment of the invention also provides an airborne phased array weather radar, which comprises a radar body and a processor, wherein the processor is used for executing the scanning method of the airborne phased array weather radar in any one of the first aspect.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. An airborne phased array weather radar scanning method is applied to an airborne machine of a phased array weather radar, and the method comprises the following steps:
determining the current flight altitude of the aircraft;
determining first scanning parameters of first scanning according to the flying height, wherein the first scanning parameters at least comprise a first pitching scanning center, a first pitching scanning interval, a first azimuth scanning interval and a first pitching scanning number;
scanning a forward-looking area of the carrier according to the first scanning parameters to obtain the meteorological cloud cluster distribution in the forward-looking area;
searching a target meteorological cloud cluster needing secondary scanning from all the meteorological cloud cluster distributions;
determining a second scanning parameter corresponding to the target meteorological cloud area according to the flying height and the azimuth parameter of the target meteorological cloud, wherein the second scanning parameter at least comprises a second pitching scanning center, a second pitching scanning interval, a second azimuth scanning interval and a second pitching scanning number, the first pitching scanning interval is larger than the second pitching scanning interval, and the first pitching scanning number is smaller than the second pitching scanning number;
and scanning the target meteorological cloud cluster according to the second scanning parameters to obtain meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data at least comprises an azimuth, a distance and a height.
2. The method of claim 1, wherein the first pitch scan center
Wherein HpAltitude, H, of a vehicle representing a phased array meteorological radarwDenotes the atmospheric zero-degree layer height, RTThe method comprises the steps of representing an airborne display range of the phased array meteorological radar;
the first pitching scanning interval is 0.8-1.2 times of the beam pitching width;
the first azimuth scanning interval is 0.3-1 degree;
the first pitch scanning number is 2 or 3.
3. The method of claim 2, wherein the second pitch scan center coincides with the first scan pitch scan center;
the value range of the second pitch scanning interval is 0.25 to 0.5 degrees;
the value range of the second azimuth scanning interval is 0.25 to 0.5 degrees;
the value range of the second pitch scanning number is 10 to 20.
4. The method of claim 1, wherein said step of scanning a forward-looking area of said aircraft in accordance with said first scanning parameters to obtain a meteorological cloud profile within said forward-looking area comprises:
scanning a forward-looking area of the carrier according to the first scanning parameters to obtain the reflectivity of all distance units in the forward-looking area;
screening out a target distance unit with the reflectivity larger than a reflectivity threshold;
and determining the meteorological cloud cluster distribution according to all the target distance units.
5. The method of claim 4, wherein the step of finding a target cloud requiring a secondary scan from the entire cloud distribution comprises:
calculating the distribution coverage area of each meteorological cloud cluster according to the mass center, the azimuth range and the distance range of each meteorological cloud cluster;
and screening the meteorological cloud cluster with the coverage area larger than the area threshold as the target meteorological cloud cluster.
6. The method of claim 1, wherein the step of scanning the target weather cloud in accordance with the second scan parameter is followed by:
determining the priority of each target meteorological cloud cluster according to the reflectivity and the position of each target meteorological cloud cluster;
according to the sequence of the priorities of all the target meteorological clouds from high to low, screening the target meteorological clouds with the priorities higher than a preset value;
and scanning the target meteorological clouds with the priority higher than the preset value in sequence according to the second scanning parameters.
7. The method of any of claims 1 to 6, wherein after the step of obtaining meteorological reflectance stereo data for the target meteorological cloud, the method further comprises:
extracting the meteorological reflectivity three-dimensional data characteristics of the target meteorological cloud cluster according to the meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data characteristics comprise the strongest reflectivity height, the centroid height, the meteorological bottom height and the meteorological top height;
judging whether the weather reflectivity three-dimensional data characteristics meet the weather threatening marking condition or not;
and if the weather reflectivity three-dimensional data characteristics reach the marking conditions threatening weather, marking early warning.
8. The method of claim 7, wherein said step of determining whether said weather reflectivity stereo data feature meets weather threatening registration conditions comprises:
judging whether the meteorological reflectivity three-dimensional data characteristics reach a preset threatened meteorological threshold value or not, and if so, determining that the marking conditions of threatened meteorological are reached; alternatively, the first and second electrodes may be,
the method is characterized in that the step of judging whether the weather reflectivity three-dimensional data features meet the weather threat marking conditions comprises the following steps:
determining the estimated weather type of the target weather cloud cluster according to the three-dimensional data characteristics of the weather reflectivity;
judging whether the estimated weather type is a threatening weather type;
and if the estimated weather type is a threatening weather type, determining that the marking condition of the threatening weather is met.
9. An airborne phased array weather radar scanning device is applied to an airborne machine of a phased array weather radar, and the method comprises the following steps:
the first determining module is used for determining the current flight height of the aircraft;
the second determining module is used for determining first scanning parameters of the first scanning according to the flying height, wherein the first scanning parameters at least comprise a first pitch angle center, a first pitch scanning range and a first scanning interval;
the first acquisition module is used for scanning a forward-looking area of the aircraft according to the first scanning parameters to obtain the meteorological cloud cluster distribution in the forward-looking area;
the searching module is used for searching a target meteorological cloud cluster needing secondary scanning from all the meteorological cloud cluster distributions;
a third determining module, configured to determine a second scanning parameter corresponding to the target meteorological cloud area according to the flying altitude and the azimuth parameter of the target meteorological cloud, where the second scanning parameter at least includes a second pitch angle center, a second pitch scanning range, and a second scanning interval, the first scanning interval is greater than the second scanning interval, and the first pitch scanning range is greater than the second pitch scanning range;
and the second acquisition module is used for scanning the target meteorological cloud cluster according to the second scanning parameters to acquire meteorological reflectivity three-dimensional data of the target meteorological cloud cluster, wherein the meteorological reflectivity three-dimensional data at least comprises an azimuth, a distance and a height.
10. An airborne phased array weather radar, characterized by comprising a radar body and a processor for performing the method of scanning of the airborne phased array weather radar of any of the claims 1 to 8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022255029A1 (en) * | 2021-05-31 | 2022-12-08 | 国立研究開発法人宇宙航空研究開発機構 | Aircraft-mounted weather radar, aircraft, and external device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730523A (en) * | 2015-03-04 | 2015-06-24 | 中国商用飞机有限责任公司 | Method for showing topographic information based on weather radar |
| CN106405513A (en) * | 2016-11-19 | 2017-02-15 | 陕西长岭电子科技有限责任公司 | Ground clutter suppression method based on multi-layer scanning contrast |
| CN108896995A (en) * | 2018-08-03 | 2018-11-27 | 中国航空工业集团公司雷华电子技术研究所 | A kind of airborne weather radar thunderstorm recognition methods |
-
2020
- 2020-09-11 CN CN202010950778.4A patent/CN112068140A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730523A (en) * | 2015-03-04 | 2015-06-24 | 中国商用飞机有限责任公司 | Method for showing topographic information based on weather radar |
| CN106405513A (en) * | 2016-11-19 | 2017-02-15 | 陕西长岭电子科技有限责任公司 | Ground clutter suppression method based on multi-layer scanning contrast |
| CN108896995A (en) * | 2018-08-03 | 2018-11-27 | 中国航空工业集团公司雷华电子技术研究所 | A kind of airborne weather radar thunderstorm recognition methods |
Non-Patent Citations (1)
| Title |
|---|
| 罗钉: "《机载有源相控阵火控雷达技术》", 31 January 2018, 航空工业出版社, pages: 87 - 94 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022255029A1 (en) * | 2021-05-31 | 2022-12-08 | 国立研究開発法人宇宙航空研究開発機構 | Aircraft-mounted weather radar, aircraft, and external device |
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