CN109557543B - Meteorological detection and target monitoring method based on azimuth rotation phased array radar - Google Patents
Meteorological detection and target monitoring method based on azimuth rotation phased array radar Download PDFInfo
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- CN109557543B CN109557543B CN201811427413.2A CN201811427413A CN109557543B CN 109557543 B CN109557543 B CN 109557543B CN 201811427413 A CN201811427413 A CN 201811427413A CN 109557543 B CN109557543 B CN 109557543B
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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
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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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- 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
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
- G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
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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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- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a meteorological detection and target monitoring method based on azimuth rotary phased array radar, which comprises the steps of enabling a meteorological detection period to comprise N target monitoring periods, enabling the target monitoring periods to be overlapped with radar azimuth mechanical rotation periods, distributing residence time to each azimuth upwards when the ith circle of target monitoring in the meteorological detection period is executed, and adopting a time division multiplexing scanning method for each azimuth direction, namely, emitting target monitoring scanning beams from the 1 st wave position to the M th wave position to each azimuth upwards, and emitting an angle degree of a pitch angle of α to each azimuthiAnd the angle number of the pitch angle of the weather-detecting scanning beam of one weather-detecting period is αiThe total of (c) is satisfied for a complete weather scan. The invention not only effectively solves the problem of fusion of target monitoring and meteorological detection, but also solves the technical problem that targets are easy to lose because a meteorological detection period occupies one target monitoring period.
Description
Technical Field
The invention relates to the technical field of phased array radars, in particular to a meteorological detection and target monitoring method based on an azimuth rotation phased array radar.
Background
The azimuth rotation phased array radar has the advantages of low cost and high flexibility, and realizes the functions of meteorological detection and target monitoring by utilizing the azimuth rotation phased array radar at the same time, so that the practicability of the radar is greatly improved. However, the target monitoring function requires a high radar scanning rate, and the weather detection function requires a radar dwell time long enough, so if the azimuth rotary phased array radar is to realize the weather detection and target monitoring functions at the same time, the design of the dwell time needs to be ensured while satisfying the requirements of target monitoring and weather detection.
Through retrieval, chinese patent publication No. CN103869309A discloses a method and system for compatibility between target monitoring and weather detection of an azimuth rotation phased array radar, which proposes an execution method using an X-circle target monitoring mode and a circle of weather detection mode to alternate with each other, and the method can solve the contradiction between the high scanning rate required by the target monitoring function and the long residence time required by the weather detection function, but the method also has significant defects.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a meteorological detection and target monitoring method based on an azimuth rotation phased array radar, which not only effectively solves the problem of fusion of target monitoring and meteorological detection, but also solves the technical problem that a target is easy to lose due to the fact that a meteorological detection period occupies one circle of target monitoring period.
In order to achieve the purpose, the invention adopts the following technical scheme that:
one meteorological detection period comprises N target monitoring periods, the target monitoring period is overlapped with the radar azimuth mechanical rotation period, namely the radar rotates N circles mechanically in one meteorological detection period, and each circle of radar rotates one target monitoring period mechanically;
in the process of executing a meteorological detection period, namely N circles of mechanical radar rotation, when the ith circle of mechanical radar rotation is executed, namely the ith circle of target monitoring is executed, i is more than or equal to 1 and less than or equal to N, residence time is distributed in each azimuth direction monitored by the ith circle of target, and a time division multiplexing scanning method is adopted for each azimuth direction;
the time division multiplexing scanning method comprises the steps of transmitting a target monitoring scanning beam from a 1 st wave position to an Mth wave position in each azimuth upwards, wherein each wave position represents a pitch angle, and transmitting a pitch angle in each azimuth with the angle of αiAnd the accumulation of the coverage area of each turn of the target surveillance transmitted weather detection scanning beam satisfies a complete weather scan.
The target monitoring scanning beams from the 1 st wave position to the M wave position are overlapped gradually.
When the pitch angle of the detected target is estimated, if the target falls in the overlapping area of the target monitoring scanning beams of two adjacent wave positions, namely the target monitoring scanning beams of the two adjacent wave positions have the echo information of the target, estimating the angle number of the pitch angle of the target by the amplitude ratio of the intensities of the target echo information of the target monitoring scanning beams of the two adjacent wave positions; when the target falls within the area of the target monitoring scanning beam at the 1 st wave position or the M wave position, the angle number of the central normal line of the 1 st wave position or the central normal line of the M wave position is used as the angle number of the pitch angle of the target in the azimuth direction.
When a certain target continuously appears near a certain area in space and tracks are continuous, the target is subjected to key marking through the terminal display control subsystem, and the position of the key marked target in the next target monitoring period, namely the next circle of mechanical rotation of the radar is estimated, so that the estimated azimuth angle and the estimated pitch angle of the key marked target are obtained;
in the next target monitoring period, namely when the next circle of radar machinery rotates, the target monitoring scanning in a burn-through mode is respectively carried out on the pitch angles intersected with the estimated pitch angles in the direction intersected with the estimated azimuth angle; and the original meteorological detection scanning in the circle of mechanical rotation of the radar is not changed.
The invention has the advantages that:
(1) the invention not only effectively solves the problem of fusion of target monitoring and meteorological detection, but also solves the technical problem that targets are easy to lose because a meteorological detection period occupies one target monitoring period.
(2) The method introduces a burn-through mode aiming at the key marked target and is used for strengthening the tracking of the key marked target.
Drawings
Fig. 1 is a system architecture diagram of an azimuth-rotated phased array radar.
FIG. 2 is a schematic diagram of a compatibility method of the present invention.
Fig. 3 shows the elevation beam pattern of the beam sweep of the present invention.
Figure 4 shows the elevation beam pattern of the "burn-through" mode scan of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention is implemented based on an azimuth rotary phased array radar including: the system comprises an antenna feed subsystem, a receiving subsystem, a signal processing subsystem, a beam control subsystem, a turntable servo subsystem, a terminal display control subsystem and a power supply subsystem.
And the antenna feed subsystem is used for directionally radiating the high-power radio-frequency signal output by the radar T/R component to the space through an antenna array surface, and receiving an echo signal during a transmission pulse interval and entering the receiving subsystem through the T/R component and the sum-difference network.
And the receiving subsystem is used for finishing down-conversion, amplification and filtering of the sum and difference echo signals to obtain intermediate frequency echo signals and sending the intermediate frequency echo signals to the signal processing subsystem.
And the signal processing subsystem is used for generating a full-machine working time sequence, receiving the intermediate frequency echo signal, carrying out A/D sampling, carrying out digital down-conversion to form an orthogonal I, Q signal, then carrying out digital pulse pressure, MTD/MTI filtering and CFAR processing on the I, Q signal, and forming an original echo sending terminal display control subsystem. And simultaneously, receiving an instruction of the terminal display control subsystem, and controlling the turntable servo subsystem and the beam control subsystem.
And the beam control subsystem receives and analyzes the control parameters forwarded by the signal processing subsystem, calculates a directional phase shift code and an attenuation code of a directional elevation angle required by the current task according to different working mode requirements, and writes the phase shift code and the attenuation code into the T/R component, so that the radar antenna forms a pitching scanning beam required by completing the task.
And the terminal display control subsystem uses a vehicle-mounted reinforced computer to receive the original echo signal returned by the signal processing subsystem through a network to form a filtering point track and a flight track, and controls the beam control subsystem and the turntable servo subsystem through the signal processing subsystem.
And the turntable servo subsystem receives the command of the signal processing subsystem and controls the antenna to rotate.
And the power supply subsystem supplies power to all other subsystems and modules except the terminal display control subsystem.
The method comprises the steps that a rotary table servo subsystem controls an azimuth rotary phased array radar to scan a plurality of azimuth directions in a mechanical rotation circle, namely an antenna rotation circle, and a beam control subsystem also scans a plurality of pitch angles in the same azimuth direction in each azimuth direction; namely, the azimuth rotary phased array radar mechanically rotates for one circle, and transmits wave beams to a plurality of pitching angles in each azimuth direction in a plurality of azimuth directions in sequence.
As shown in fig. 2, the compatible method of the azimuth rotation phased array radar is as follows:
one meteorological detection period comprises N target monitoring periods, the target monitoring period is overlapped with the radar azimuth mechanical rotation period, namely the radar rotates N circles mechanically in one meteorological detection period, and each circle of radar mechanical rotation in the N circles is one target monitoring period;
in the method, in the execution of a weather detection period, namely N circles of mechanical radar rotation, when the ith circle of mechanical radar rotation is executed, namely the ith circle of target monitoring, i is more than or equal to 1 and less than or equal to N, residence time is distributed in each azimuth direction monitored by the ith circle of target monitoring, and a time division multiplexing scanning method is adopted for each azimuth direction, wherein the time division multiplexing scanning method comprises the steps of transmitting target monitoring scanning beams from a 1 st wave position to an Mth wave position in each azimuth direction, each wave position represents a pitch angle, and transmitting a pitch angle in each azimuth direction by an angle αiAnd the cumulative coverage area of the weather detection scanning beam monitored by each target turn satisfies a complete weather scan.
Fig. 3 is a pitching beam pattern of beam scanning in a certain direction in a radar re-target monitoring period, wherein target monitoring scanning beams starting from the 1 st wave position to the M wave position are sequentially and gradually overlapped; the progressive overlapping is that the pitch angles of adjacent wave positions are gradually increased, and the coverage areas of the target monitoring scanning beams of the adjacent wave positions have overlapping parts. When the pitch angle of a detected target is estimated, if the target falls in the overlapping area of the target monitoring scanning beams of two adjacent wave positions, namely the target monitoring scanning beams of the two adjacent wave positions have the echo information of the target, estimating the angle number of the pitch angle of the target through the amplitude ratio of the intensities of the two echo information; when the target falls within the area of the target monitoring scanning beam at the 1 st wave position or the M wave position, the angle number of the central normal line of the 1 st wave position or the central normal line of the M wave position is used as the angle number of the pitch angle of the target in the azimuth direction.
And as shown in fig. 3, in addition to the target monitoring scanning beam having the 1 st wave position to the M th wave position, a weather detection scanning beam is emitted in this direction.
When a certain target continuously appears near a certain area in space and tracks are continuous, namely a plurality of continuous circles of targets are continuously monitored and can be continuously found near the certain area in space, the target is subjected to key marking through the terminal display control subsystem, the position of the key marked target in the next target monitoring period, namely the next circle of radar mechanical rotation is estimated, and the estimated azimuth angle and the estimated pitch angle of the key marked target are obtained. As shown in fig. 4, during the next target monitoring period, i.e. the next circle of radar mechanical rotation, the target is respectively in the direction intersecting with the estimated azimuth angle, and the target monitoring scanning in the "burn-through" mode is respectively performed on the pitch angles intersecting with the estimated pitch angles; and the original meteorological detection scanning in the circle of mechanical rotation of the radar is not changed.
The "burn-through" mode refers to a mode in which a beam emitted by a radar can penetrate through electronic interference of an opposite party so as to detect a target, which is described in the prior art.
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A meteorological detection and target monitoring method based on an azimuth rotation phased array radar is characterized in that one meteorological detection period comprises N target monitoring periods, the target monitoring period is overlapped with a radar azimuth mechanical rotation period, namely a radar rotates N times mechanically in one meteorological detection period, and each radar rotates one target monitoring period;
in the process of executing a meteorological detection period, namely N circles of mechanical radar rotation, when the ith circle of mechanical radar rotation is executed, namely the ith circle of target monitoring is executed, i is more than or equal to 1 and less than or equal to N, residence time is distributed in each azimuth direction monitored by the ith circle of target, and a time division multiplexing scanning method is adopted for each azimuth direction;
the time division multiplexing scanning method comprises the steps of transmitting a target monitoring scanning beam from a 1 st wave position to an Mth wave position in each azimuth upwards, wherein each wave position represents a pitch angle, and transmitting a pitch angle in each azimuth with the angle of αiAnd the accumulation of the coverage area of each turn of the target surveillance transmitted weather detection scanning beam satisfies a complete weather scan.
2. The weather detection and target monitoring method based on the azimuth rotating phased array radar is characterized in that target monitoring scanning beams from the 1 st wave position to the M wave position are overlapped gradually; the progressive overlapping is that the pitch angles of adjacent wave positions are gradually increased, and the coverage areas of the target monitoring scanning beams of the adjacent wave positions have overlapping parts.
3. The weather detecting and target monitoring method based on the azimuth rotating phased array radar as claimed in claim 1 or 2, wherein when estimating the pitch angle of the detected target, if the target falls within the overlapping region of the target monitoring scanning beams of two adjacent wave positions, that is, the target monitoring scanning beams of the two adjacent wave positions both have the echo information of the target, the number of the pitch angle of the target is estimated by the amplitude ratio of the intensities of the target echo information of the target monitoring scanning beams of the two adjacent wave positions; when the target falls within the area of the target monitoring scanning beam at the 1 st wave position or the M wave position, the angle number of the central normal line of the 1 st wave position or the central normal line of the M wave position is used as the angle number of the pitch angle of the target in the azimuth direction.
4. The weather detection and target monitoring method based on the azimuth rotating phased array radar as claimed in claim 3, wherein when a target appears continuously in the vicinity of a certain area in space and the track is continuous, the target is marked with emphasis by the terminal display control subsystem, and the position of the marked with emphasis in the next target monitoring period, i.e. the mechanical rotation of the radar in the next circle, is estimated, so as to obtain the estimated azimuth angle and the estimated pitch angle of the marked target;
in the next target monitoring period, namely when the next circle of radar machinery rotates, the target monitoring scanning in a burn-through mode is respectively carried out on the pitch angles intersected with the estimated pitch angles in the direction intersected with the estimated azimuth angle; and the original meteorological detection scanning in the circle of mechanical rotation of the radar is not changed.
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| CN113721205A (en) * | 2021-08-27 | 2021-11-30 | 四创电子股份有限公司 | Phased array radar target multi-target signal simulation method |
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