CN111239741A - Phased array weather radar polarization control method and phased array weather radar system - Google Patents
Phased array weather radar polarization control method and phased array weather radar system Download PDFInfo
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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
- 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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
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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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
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- G01S2013/0245—Radar with phased array antenna
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Abstract
The invention provides a phased array weather radar polarization control method and a phased array weather radar system, wherein the phased array weather radar polarization control method comprises the following steps: receiving a polarization mode selection; determining a first polarization parameter of each waveguide included in the phased array weather radar according to the polarization mode parameter; and sending the first polarization parameters to corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the first polarization parameters. By implementing the invention, the precise control of each waveguide by using the polarization mode parameters can be realized, so that the phased array weather radar can send/receive any polarization signal required, and the requirement of actual weather detection is met.
Description
Technical Field
The invention relates to the technical field of weather radars, in particular to a phased array weather radar polarization control method and a phased array weather radar system.
Background
The polarized weather radar is one of new development directions in the field of weather radar, and plays an increasingly important role in quantitative precipitation estimation, hail identification, rainfall particle classification and the like. The phased array radar utilizes a large number of small antenna units which are independently controlled to be arranged into an antenna array surface to synthesize beams with different phases, has the advantages of high scanning speed, high time resolution and advanced technical system, and is widely applied to the field of meteorological detection.
In the related technology, most phased array weather radars adopt an analog system, cannot accurately control the synthesis of wave beams, are not high in flexibility, adopt a single polarization mode, cannot complete the receiving and sending of any polarization information, and cannot completely meet the actual weather detection requirement.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects that the synthesis of the wave beam cannot be precisely controlled, the receiving and sending of any polarization information cannot be completed, and the actual weather detection requirements cannot be completely met in the prior art, so as to provide a polarization control method for a phased array weather radar and a phased array weather radar system.
According to a first aspect, an embodiment of the present invention provides a phased array weather radar polarization control method, including: receiving a polarization mode parameter; determining a first polarization parameter of each waveguide included in the phased array weather radar according to the polarization mode parameter; and sending the first polarization parameters to corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the first polarization parameters.
With reference to the first aspect, in a first implementation manner of the first aspect, the sending the first polarization parameter to a corresponding waveguide so that the waveguide transmits/receives different polarization signals according to the first polarization parameter includes: receiving a direction parameter for each waveguide; and sending the polarization parameters and the direction parameters to corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the polarization parameters and the direction parameters.
With reference to the first aspect, in a second implementation manner of the first aspect, after the sending the first polarization parameter to the corresponding waveguide so that the waveguide transmits/receives different polarization signals according to the first polarization parameter, the method further includes: receiving the polarized signal; preprocessing the polarization signal; and obtaining weather information according to the preprocessing result.
With reference to the first aspect, in a third embodiment of the first aspect, the method further includes: acquiring different polarization signals transmitted/received by the waveguide; obtaining a second polarization parameter of the polarization signal according to the polarization signal; and calibrating the second polarization parameter.
According to a second aspect, an embodiment of the present invention provides a polarization control apparatus for a phased array weather radar, including: the parameter receiving module is used for receiving the polarization mode parameters; the first polarization parameter determination module is used for determining a first polarization parameter of each waveguide included in the phased array weather radar according to the polarization mode parameter; and the polarized signal transmitting/receiving module is used for transmitting the first polarization parameter to the corresponding waveguide, so that the waveguide transmits/receives different polarized signals according to the first polarization parameter.
According to a third aspect, embodiments of the invention provide a phased array weather radar system comprising: a phased array weather radar including a plurality of waveguides; a terminal, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the phased array weather radar polarization control method according to the first aspect or any embodiment of the first aspect when executing the program.
With reference to the third aspect, in a first embodiment of the third aspect, the phased array weather radar system further includes: and the frequency source is used for generating a waveguide synchronization signal and a waveguide calibration signal.
With reference to the third aspect, in a second embodiment of the third aspect, the phased array weather radar system further includes: and the power supply equipment is used for supplying power to the phased array weather radar system.
With reference to the third aspect, in a third implementation manner of the third aspect, the phased array weather radar system further includes: and the servo subsystem is used for controlling the rotation angle of the phased array weather radar.
According to a fourth aspect, an embodiment of the present invention provides a storage medium, on which computer instructions are stored, and the instructions, when executed by a processor, implement the steps of the phased array weather radar polarization control method according to the first aspect or any of the embodiments of the first aspect.
The technical scheme of the invention has the following advantages:
1. the invention provides a polarization control method/device for a phased array weather radar, which is used for accurately controlling each waveguide by using polarization mode parameters through the polarization mode parameters, so that the phased array weather radar can send/receive any polarization signal required, and the requirement of actual weather detection is met.
2. According to the polarization control method/device for the phased array weather radar, the azimuth and pitch angle information is calculated by setting the direction parameters by the user, the phased array weather radar is controlled to rotate according to the calculation result, and the phased array weather radar can send/receive any azimuth and any polarization information.
3. According to the polarization control method/device for the phased array weather radar, amplitude and phase calibration is carried out on the transmitted/received polarization signals, and when the preset amplitude phase is not met, the amplitude phase is adjusted until the preset amplitude and phase are met, so that the control precision of the subsequent amplitude and phase is ensured.
4. The phased array weather radar system provided by the invention can realize the transmission/reception of any polarization signal of the phased array weather radar by controlling the phased array weather radar through the terminal, and meets the requirement of actual weather detection.
5. The frequency source in the phased array weather radar system provided by the invention can provide synchronization and reference signals of the phased array weather radar system, and can also be matched with the calibration function of the phased array weather radar system, so that the accuracy of transmitting/receiving signals of the phased array weather radar system is improved.
6. The servo subsystem in the phased array weather radar system can control the azimuth and the pitch angle of the phased array weather radar system according to the user instruction, and the receiving and sending functions of polarization signals in any direction of the phased array weather radar system are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a specific example of a polarization control method for a phased array weather radar in an embodiment of the invention;
FIG. 2 is a schematic block diagram of a specific example of a polarization control apparatus for a phased array weather radar in an embodiment of the invention;
FIG. 3 is a block diagram of a specific example of a phased array weather radar system in an embodiment of the invention;
FIG. 4 is a block diagram of a specific example of a phased array weather radar system in an embodiment of the present invention;
fig. 5 is a schematic block diagram of a specific example of a terminal in the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment provides a polarization control method for a phased array weather radar, as shown in fig. 1, including the following steps:
s110: polarization mode parameters are received.
Illustratively, the polarization mode parameter may be a horizontal linear polarization mode, a vertical linear polarization mode, a dual polarization LDRH mode, a dual polarization LDRV mode, an alternating transmit, simultaneous receive dual polarization mode, a diagonal polarization mode, a circular polarization mode, an elliptical polarization mode, or the like. The dual-polarization LDRH mode represents that horizontal polarization electromagnetic waves are transmitted, and horizontal and vertical polarization electromagnetic waves are received at the same time; the dual-polarization LDRV mode represents that vertical polarization electromagnetic waves are transmitted, and horizontal and vertical polarization electromagnetic waves are received at the same time; the alternate transmission and simultaneous reception of the dual-polarization mode means that the horizontal and vertical polarized electromagnetic waves are alternately transmitted and the horizontal and vertical polarized electromagnetic waves are simultaneously received; the diagonal polarization mode means that the horizontally and vertically polarized electromagnetic waves are simultaneously transmitted and the horizontally and vertically polarized electromagnetic waves are simultaneously received. The method for receiving the polarization mode selection may be to receive the polarization mode set by the user, or to receive the mode selection information pre-stored in the memory. The polarization mode and the receiving mode are not limited in this embodiment, and those skilled in the art can set the polarization mode and the receiving mode as needed.
S120: and determining a first polarization parameter of each waveguide included in the phased array weather radar according to the polarization mode parameter.
Illustratively, the different polarization modes are generally defined in a manner that the spatial orientation of the electric field vector in space varies with time, the polarization mode depending on the amplitude and phase of the electromagnetic wave signal, and thus the polarization parameters may be the amplitude and phase of the electromagnetic wave signal transmitted/received by the waveguide, which may be determined by the following formula:
setting the x axis as the horizontal direction, the y axis as the vertical direction, and the z axis as the propagation direction of electromagnetic wave signals, wherein: e0xFor horizontally polarized electromagnetic wave electric field amplitude, w is electromagnetic wave frequency, k is wave number, deltaxFor the initial phase of horizontally polarized electromagnetic waves, E0yFor perpendicularly polarizing the electric field amplitude, delta, of an electromagnetic waveyIs vertically inclinedThe initial phase of the vibrating electromagnetic wave.
The polarization mode is used as an oblique line polarization mode, the phased array weather radar is composed of 120 waveguides, horizontal polarization cracks and vertical polarization cracks exist in the waveguides, the amplitude of transmitting/receiving signals of the horizontal polarization cracks obtained through calculation is the same as that of signals transmitted/received by the vertical polarization cracks, the signals can be all 1, the phase difference only needs n pi, and the phases can be all 0 or pi. When the phase difference is 0, the included angle between the electromagnetic wave electric field and the x axis is pi/4, and when the phase difference is pi, the included angle between the electromagnetic wave electric field and the x axis is 3 pi/4. The electric field of the transmitting/receiving electromagnetic wave is in a straight line with the time change of the spatial orientation, and then the polarization mode of the wave beam is oblique line polarization.
In addition, when the polarization mode is a horizontal line polarization mode, the emission/receiving amplitude of the vertical polarization crack obtained through calculation can be 0, and the phased array weather radar realizes the horizontal polarization mode; when the polarization mode is a vertical linear polarization mode, the calculated transmitting/receiving amplitude of the horizontal polarization crack can be 0, and the phased array weather radar realizes the vertical polarization mode; when the polarization mode is a dual-polarization LDRH mode, the emission amplitude of the vertical polarization crack obtained by calculation can be 0, the receiving amplitude of the horizontal polarization crack and the receiving amplitude of the vertical polarization crack obtained by calculation are equal and in the same phase, and the dual-polarization LDRH mode is realized by the phased array weather radar; when the polarization mode is a dual-polarization LDRV mode, the emission amplitude of the calculated horizontal polarization crack can be 0, the receiving amplitude of the calculated horizontal polarization crack and the receiving amplitude of the calculated vertical polarization crack are equal and in the same phase, and the dual-polarization LDRV mode is realized by the phased array weather radar.
When the polarization mode is an alternate transmitting and simultaneous receiving dual-polarization mode, in the 1 st dwell time, the transmitting amplitude of the vertical polarization crack can be 0, the receiving of the horizontal polarization crack and the vertical polarization crack are equal in amplitude and same in phase, in the 2 nd dwell time, the transmitting amplitude of the horizontal polarization crack can be 0, the receiving of the horizontal polarization crack and the vertical polarization crack are equal in amplitude and same in phase, in the 3 rd dwell time, the transmitting amplitude of the vertical polarization crack can be 0, the receiving of the horizontal polarization crack and the vertical polarization crack are equal in amplitude and same in phase, the calculated amplitude phase results are sequentially alternated, and the phased array weather radar can realize alternate transmitting and simultaneous receiving dual-polarization modes; when the polarization mode is a circular polarization mode, calculating to obtain the same emission amplitude and the same phase difference (2n +/-1) pi/2 (n is 0,1,2,3 …) of the horizontal polarization crack and the vertical polarization crack, and obtaining the same receiving amplitude and the same phase difference (2n +1) pi/2 (n is 0,1,2,3 …) of the horizontal polarization crack and the vertical polarization crack, so that the phased array weather radar realizes the circular polarization mode; when the polarization mode is the elliptical polarization mode, the transmitting amplitude and the phase of the obtained horizontal and vertical polarization cracks can be any values, the receiving amplitude and the phase of the horizontal and vertical polarization cracks can be any same values, and the elliptical polarization mode is realized by the phased array weather radar.
S130: and sending the first polarization parameters to the corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the first polarization parameters.
Illustratively, the waveguide enables transmission/reception of horizontally polarized signals when the first polarization parameter satisfies a horizontally linear polarization mode; when the first polarization parameter meets a vertical linear polarization mode, the waveguide realizes transmitting/receiving of a vertical polarization signal; when the first polarization parameter meets a dual-polarization LDRH mode, the waveguide realizes transmitting a horizontal polarization signal and simultaneously receives horizontal and vertical polarization signals; when the first polarization parameter meets a dual-polarization LDRV mode, the waveguide realizes transmitting a vertical polarization signal and simultaneously receives a horizontal polarization signal and a vertical polarization signal; when the first polarization parameter meets the dual-linear polarization mode of alternate transmission and simultaneous reception, the waveguide realizes alternate transmission and simultaneous reception of horizontal and vertical polarization signals; when the first polarization parameter meets the oblique line polarization mode, the waveguide realizes the simultaneous transmission and reception of horizontal and vertical polarization signals; when the first polarization parameter meets the circular polarization mode, the waveguide realizes transmitting and receiving circular polarization signals; when the first polarization parameter satisfies the elliptical polarization mode, the waveguide realizes transmission and reception of an elliptical polarization signal.
The embodiment provides a polarization control method for a phased array weather radar, which is characterized in that each waveguide is accurately controlled by receiving polarization mode parameters and utilizing the polarization mode parameters, so that the phased array weather radar can send/receive any needed polarization signal, and the requirement of actual weather detection is met.
As an optional manner of this embodiment, step S130 includes:
first, a direction parameter for each waveguide is received.
For example, the direction parameter of the waveguide may be a beam direction set by a user, and the receiving manner may be directly receiving beam direction information input by the user, or receiving beam direction information preset by a memory.
And secondly, transmitting the polarization parameters and the direction parameters to corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the polarization parameters and the direction parameters.
Illustratively, the polarization parameters represent a polarization mode selected by a user, including amplitude, phase parameters; the direction parameters comprise azimuth parameters, pitch angle parameters and the like, the polarization parameters determine the quantity of wave beams transmitted/received by the waveguide, the wave beam direction and the control of a polarization mode, and the wave beam direction control and the wave beam quantity control in the horizontal direction can be realized through the amplitude phase of the horizontal polarization channel; the beam pointing control and the beam quantity control in the vertical direction can be realized through the amplitude phase of the vertical polarization channel; by means of amplitude consistency of the horizontal polarization channel and the vertical polarization channel, sending and receiving of different polarization modes can be achieved. The direction parameters determine the angle scanning range of the wave beam and provide azimuth and pitch angle information for the phased array weather radar in real time.
As an optional implementation manner of this embodiment, a phased array and a servo system may be used to jointly function, so as to implement omnidirectional scanning of a phased array weather radar. The specific implementation manner may be to perform azimuth scanning by using a servo system and perform pitch scanning by using a phased array, and the embodiment does not limit the way in which the phased array and the servo system act together, and those skilled in the art can determine the scanning manner as needed.
According to the polarization control method of the phased array weather radar, the azimuth and pitch angle information is calculated by setting the direction parameters by the user, the phased array weather radar is controlled to rotate according to the calculation result, and the phased array weather radar can transmit/receive any azimuth and any polarization information.
As an optional manner of this embodiment, after the step S130, the method includes:
first, a polarized signal is received.
For example, the polarization signal may be an echo polarization signal received by the phased array weather radar and scattered back by the target detection object, and the phased array weather radar is used for measuring precipitation, and the received polarization signal is an echo polarization signal scattered back by precipitation particles. The embodiment does not limit the type of the polarized signal received by the phased array weather radar and the target detection object, and a person skilled in the art can determine the type and the target detection object according to needs.
Secondly, the polarization signal is preprocessed.
The preprocessing is to analyze the received polarized signals, and analyze the information of the characteristics, distribution, intensity, etc. of the target detection object. The preprocessing method may be to analyze and determine according to amplitude information of the received polarization signal, or may be to analyze and determine by using information of a change between an echo frequency of the polarization signal and a frequency of the transmitted polarization signal. Still taking the measurement of precipitation as an example, the characteristics of precipitation, such as raindrop spectrum, rain intensity, phase state of precipitation particles, and shape of ice crystal particles, all have different influences on the scattering and absorption of beams emitted by the phased array weather radar. Analyzing and judging the received echo polarization signals, establishing various theoretical and empirical relational expressions between precipitation echo power and precipitation intensity, and preprocessing the echo polarization signals according to the relational expressions to obtain a preprocessing result. The method for preprocessing the polarization signal is not limited in this embodiment, and can be determined by those skilled in the art as needed.
Thirdly, obtaining weather information according to the preprocessing result.
For example, weather information such as the current precipitation amount, precipitation intensity, distribution condition or whether the current precipitation form is precipitation or snowfall can be obtained according to the preprocessing result. Taking the intensity of the polarization signal obtained by preprocessing as an example, acquiring a pre-established corresponding relation table of the intensities of different polarization signals and the meteorological information, and comparing the intensity of the polarization signal obtained by preprocessing with the relation table to obtain corresponding meteorological information.
The phased array weather radar polarization control method provided by the embodiment preprocesses the received polarization signal, can judge the current weather through a preprocessing result, and improves the accuracy of a weather information prediction result.
As an optional manner of this embodiment, the phased array weather radar polarization control method further includes:
firstly, acquiring different polarization signals transmitted/received by a waveguide;
for example, when acquiring the transmitted/received polarization signal, the acquiring may be that when transmitting/receiving the polarization signal, the polarization signal is coupled through a coupling waveguide connected to the waveguide to acquire the polarization signal transmitted/received by multiple waveguides. The present embodiment does not limit the manner of acquiring the different polarization signals transmitted/received by the waveguide, and those skilled in the art can determine the manner as needed.
And secondly, obtaining a second polarization parameter of the polarization signal according to the polarization signal.
Illustratively, the processing mode of the polarization signal is to calculate amplitude and phase information of all the transmitting/receiving signals through amplitude and phase analysis, and use the obtained amplitude and phase information as the second polarization parameter.
And thirdly, calibrating the second polarization parameter.
For example, in this embodiment, taking 120 transmit/receive channels as an example, the calibration of the second polarization parameter may be performed by using the amplitude and phase of the transmit/receive of the 1 st transmit/receive channel as a standard, calculating and storing the amplitude difference and phase difference between the other channels and the 1 st channel by the terminal, and storing the calibration result; when in normal transmitting/receiving work, the calibration result is added to the amplitude phase control, and then the amplitude phase information required by polarization and beam control is calculated. The calibration method is not limited in this embodiment, and can be determined by those skilled in the art as needed.
According to the polarization control method for the phased array weather radar, amplitude and phase calibration is carried out on the transmitted/received polarization signals, and when the preset amplitude phase is not met, the amplitude phase is adjusted until the preset amplitude and phase are met, so that the control precision of the subsequent amplitude and phase is ensured.
The present embodiment provides a polarization control apparatus for a phased array weather radar, as shown in fig. 2, including:
a parameter receiving module 210 for receiving polarization mode parameters; the specific implementation manner is shown in step S110 of the method of this embodiment, and details are not described here.
The first polarization parameter determination module 220 is configured to determine a first polarization parameter of each waveguide included in the phased array weather radar according to the polarization mode parameter; the specific implementation manner is shown in step S120 of the method of this embodiment, and details are not described here.
The polarized signal transmitting/receiving module 230 is configured to transmit the first polarization parameter to the corresponding waveguide, so that the waveguide transmits/receives different polarized signals according to the first polarization parameter. The specific implementation manner is shown in step S130 of the method of this embodiment, and details are not described here.
The invention provides a polarization control device of a phased array weather radar, which is characterized in that the amplitude and phase of each waveguide transmitting/receiving signal are digitally controlled by utilizing polarization mode parameters through the selection of a polarization mode, so that the phased array weather radar can transmit/receive any polarization signal required, and the requirement of actual weather detection is met.
As an optional manner of this embodiment, the polarized signal transmitting/receiving module includes:
and the direction parameter receiving module is used for receiving the direction parameter of each waveguide. The specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
And the polarization signal transmitting/receiving submodule is used for transmitting the polarization parameters and the direction parameters to the corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the polarization parameters and the direction parameters. The specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
As an optional implementation manner of this embodiment, the polarization control apparatus for phased array weather radar further includes:
and the polarized signal receiving module is used for receiving the polarized signal. The specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
And the preprocessing module is used for preprocessing the polarization signal. The specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
And the meteorological information acquisition module is used for acquiring meteorological information according to the preprocessing result. The specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
As an optional implementation manner of this embodiment, the polarization control apparatus for phased array weather radar further includes:
the polarization signal acquisition module is used for acquiring different polarization signals transmitted/received by the waveguide; the specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
The polarization signal processing module is used for obtaining a second polarization parameter of the polarization signal according to the polarization signal; the specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
And the calibration module is used for calibrating the second polarization parameter. The specific implementation manner is shown in the corresponding part of the method of the embodiment, and is not described herein again.
The present embodiment provides a phased array weather radar system, as shown in fig. 3, including:
phased array weather radar 310 includes a plurality of waveguides.
Illustratively, the phased array weather radar 310 comprises a plurality of split waveguides, a calibration network, a radome and an antenna frame, and is used for realizing the transmission and reception of any polarization signals. The split waveguide adopts a ridge waveguide mode that horizontal polarization and vertical polarization are distributed in rows, the horizontal polarization is provided with an inclined slit on a narrow side, the vertical polarization is provided with a longitudinal slit on a wide side, and the longitudinal slits are alternately distributed on two sides of an axis. And the calibration network is used for realizing internal calibration of the phased array weather radar microwave signals. The antenna housing provides a protective shell for the phased array weather radar, and damage to the crack waveguide caused by environmental factors such as wind, rain and the like is avoided. The antenna frame is used for providing fixed support for the phased array weather radar.
The phased array weather radar provided by this embodiment, as shown in fig. 4, 120 crack waveguides are adopted and correspond to 120 horizontal polarization cracks and 120 vertical polarization cracks, 120 horizontal polarization cracks correspond to 120 digital transceiver modules respectively, 120 vertical polarization cracks correspond to 120 digital transceiver modules respectively, 30 digital transceiver modules are adopted, each digital transceiver module includes 8 transceiver channels, and the 30 digital transceiver modules have 240 transceiver channels in total and correspond to 120 horizontal polarization cracks and 120 vertical polarization cracks respectively.
The terminal 320 includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the steps of any one of the phased array weather radar polarization control methods in the above embodiments are implemented.
For example, the terminal can calculate the amplitude and phase of the transmitted/received signal according to the system instruction, and implement digital beam forming processing and signal processing of the multipath signal and control to perform transmission calibration and reception calibration, and for specific implementation, refer to the above method embodiment, and details are not described here.
The phased array weather radar system provided by the embodiment realizes the transmission/reception of any polarization signal of the phased array weather radar through the terminal control phased array weather radar, and meets the requirement of actual weather detection.
As an optional manner of this embodiment, the phased array weather radar system further includes: and the frequency source is used for generating a waveguide synchronization signal and a waveguide calibration signal. The signal receiving and sending synchronization of the phased array weather radar can be realized, and the calibration function of the phased array weather radar system can be realized in a matched mode.
The specific mode of realizing the calibration function of the phased array weather radar system by the cooperation of the frequency source is as follows: when the phased array weather radar emission calibration works, the digital transceiving component emits a 1 st path of emission signals, the signals are radiated by the crack waveguide, meanwhile, the signals enter a frequency source through a coupling waveguide connected with the crack waveguide, the frequency source matches and receives the signals and then sends the data to a terminal, and the terminal can obtain the amplitude and phase information of the path of emission signals; in the same way, the digital transceiving component transmits the transmitting signals of other paths, the transmitting signals enter the frequency source through the coupling waveguide, and after the frequency source is matched and received, the amplitude and phase information of the transmitting signals can be acquired. Amplitude and phase information of all transmitting channels of the phased array weather radar system can be obtained through transmitting calibration, inconsistency among the transmitting channels is calculated, and the errors are compensated through later-stage calculation of the terminal.
When the phased array weather radar receives and calibrates, a frequency source generates a pilot calibration signal, the pilot calibration signal simultaneously enters each path of crack waveguide through a coupling waveguide, and the digital receiving and transmitting component receives the signal and then performs matched receiving, so that the amplitude and phase information of each path of received signal can be obtained. Through receiving and calibrating, amplitude and phase information of all receiving channels of the phased array weather radar system can be obtained, inconsistency among the receiving channels is calculated, and then the error is compensated through later-stage calculation of the terminal.
The frequency source among the phased array weather radar system that this embodiment provided can provide phased array weather radar system's receiving and dispatching signal synchronous, can also cooperate the standard school function that realizes phased array weather radar system, has improved phased array weather radar system transmission/received signal's accuracy.
As an optional manner of this embodiment, the phased array weather radar system further includes: and the power supply equipment is used for supplying power to the phased array weather radar system.
As an optional manner of this embodiment, the phased array weather radar system further includes:
and the servo subsystem is used for controlling the rotation angle of the phased array weather radar, realizing reliable azimuth and pitch scanning and orientation and providing azimuth and pitch angle information for the phased array weather radar system in real time.
The servo subsystem may be composed of a position detector, a voltage comparison amplifier, and an actuator, where the position measurer is a position (angle) detector composed of a command signal potentiometer and a feedback potentiometer, converts a received specified angular displacement into a voltage signal, outputs the voltage signal to the voltage comparison amplifier through a computer system, amplifies and compares the voltage, and outputs the voltage signal to the actuator after deviation adjustment, so that the actuator drives the phased array weather radar to rotate to a specified position, and the actuator may be an electric motor, a hydraulic motor, or a control valve. The specific composition of the servo subsystem and the type of the actuator are not limited in this embodiment, and those skilled in the art can determine the type of the actuator according to the needs.
The servo subsystem in the phased array weather radar system that this embodiment provided can carry out the control of position and angle of pitch to phased array weather radar system according to user's instruction, has realized phased array weather radar system's arbitrary direction polarization signal's receipt and send function.
The embodiment of the present application further provides a terminal, as shown in fig. 5, including a processor 510 and a memory 520, where the processor 510 and the memory 520 may be connected by a bus or in other manners.
Processor 510 may be a Central Processing Unit (CPU). The Processor 510 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 520, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules corresponding to the phased array weather radar polarization control method in the embodiments of the present invention. The processor executes various functional applications and data processing of the processor by executing non-transitory software programs, instructions, and modules stored in the memory.
The memory 520 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor, and the like. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 520 may optionally include memory located remotely from the processor, which may be connected to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 520 and, when executed by the processor 510, perform a phased array weather radar polarization control method as in the embodiment of fig. 1.
The details of the electronic device may be understood with reference to the corresponding related description and effects in the embodiment shown in fig. 1, and are not described herein again.
The embodiment also provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the polarization control method of the phased array weather radar in any method embodiment. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard disk (Hard disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A phased array weather radar polarization control method is characterized by comprising the following steps:
receiving a polarization mode parameter;
determining a first polarization parameter of each waveguide included in the phased array weather radar according to the polarization mode parameter;
and sending the first polarization parameters to corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the first polarization parameters.
2. The method of claim 1, wherein the sending the first polarization parameter to the corresponding waveguide, so that the waveguide transmits/receives different polarization signals according to the first polarization parameter, comprises:
receiving a direction parameter for each waveguide;
and sending the polarization parameters and the direction parameters to corresponding waveguides, so that the waveguides transmit/receive different polarization signals according to the polarization parameters and the direction parameters.
3. The method of claim 1, wherein after sending the first polarization parameter to the corresponding waveguide so that the waveguide transmits/receives different polarization signals according to the first polarization parameter, further comprising:
receiving the polarized signal;
preprocessing the polarization signal;
and obtaining weather information according to the preprocessing result.
4. The method of claim 1, further comprising:
acquiring different polarization signals transmitted/received by the waveguide;
obtaining a second polarization parameter of the polarization signal according to the polarization signal;
and calibrating the second polarization parameter.
5. A phased array weather radar polarization control apparatus, comprising:
the parameter receiving module is used for receiving the polarization mode parameters;
the first polarization parameter determination module is used for determining a first polarization parameter of each waveguide included in the phased array weather radar according to the polarization mode parameter;
and the polarized signal transmitting/receiving module is used for transmitting the first polarization parameter to the corresponding waveguide, so that the waveguide transmits/receives different polarized signals according to the first polarization parameter.
6. A phased array weather radar system, comprising:
a phased array weather radar including a plurality of waveguides;
a terminal comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the phased array weather radar polarization control method of any one of claims 1-4 when executing the program.
7. The phased array weather radar system as claimed in claim 6, further comprising: and the frequency source is used for generating a waveguide synchronization signal and a waveguide calibration signal.
8. The phased array weather radar system as claimed in claim 6, further comprising: and the power supply equipment is used for supplying power to the phased array weather radar system.
9. The phased array weather radar system as claimed in claim 6, further comprising: and the servo subsystem is used for controlling the rotation angle of the phased array weather radar.
10. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the phased array weather radar polarization control method of any one of claims 1 to 4.
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