CN114047485A - Phased array radar darkroom rapid detection system, method, equipment and storage medium - Google Patents

Phased array radar darkroom rapid detection system, method, equipment and storage medium Download PDF

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CN114047485A
CN114047485A CN202111171103.0A CN202111171103A CN114047485A CN 114047485 A CN114047485 A CN 114047485A CN 202111171103 A CN202111171103 A CN 202111171103A CN 114047485 A CN114047485 A CN 114047485A
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calibration
channel
phase
radar
array surface
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廖育富
游斌相
刘泽
马婕
任午龙
杨啸宇
王彦成
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Sichuan Jiuzhou ATC Technology Co Ltd
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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
    • G01S7/40—Means for monitoring or calibrating
    • 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
    • G01S7/40—Means for monitoring or calibrating
    • G01S7/4004—Means for monitoring or calibrating of parts of a radar system
    • 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
    • G01S7/40—Means for monitoring or calibrating
    • G01S7/4004—Means for monitoring or calibrating of parts of a radar system
    • G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
    • 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
    • G01S7/40—Means for monitoring or calibrating
    • G01S7/4004—Means for monitoring or calibrating of parts of a radar system
    • G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers

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Abstract

The invention discloses a phased array radar darkroom rapid detection system, a method, equipment and a storage medium, wherein the system comprises a radar array surface to be detected and a detection unit, the radar array surface to be detected is connected with a communication unit, the detection unit comprises an array surface state monitoring module, a wave control code resolving module and an internal field channel calibration module, and the array surface state monitoring module, the wave control code resolving module and the internal field channel calibration module are respectively connected with the communication unit. The method has the functions of phased array radar array surface monitoring, inter-channel real-time calibration, on-line real-time wave control code settlement and distribution, communication and state display, and can effectively improve the working efficiency of phased array radar darkroom testing and preparation before darkroom testing.

Description

Phased array radar darkroom rapid detection system, method, equipment and storage medium
Technical Field
The invention belongs to the technical field of radar testing, and particularly relates to a phased array radar darkroom rapid detection system, method, equipment and storage medium.
Background
In the test and debugging process of the phased array radar, due to the fact that the number of antenna array surface components is large and the types of the antenna array surface components are multiple, the main problem in the radar darkroom test process is that the test and data loading of a large number of components are completed, and the primary problem analysis is accurately and quickly carried out on a fault component, and the main problem is a very time-consuming stage in the whole radar test process.
At present in the radar development process, prepare work and darkroom test work before the darkroom test contain a large amount of test jobs, specifically have: the method comprises the following working steps of TR channel testing, TR state monitoring, pointing accuracy testing, fault analysis, antenna directional pattern testing and the like. However, the system assistance means is not available to complete the above work, and the work efficiency is low.
For example, chinese patent application No. CN201810559240.3 discloses an automatic test apparatus and method for a phased array radar TR assembly, and chinese patent application No. cn201510731960.x discloses an amplitude-phase test system for an active phased array radar T/R assembly. The technical schemes disclosed by the two patents can only realize the TR channel test, but cannot realize the fault analysis.
For example, chinese patent application No. CN201811222005.3 discloses a system and method for on-line testing of mass production radar. The technical scheme of the patent can only realize fault analysis, but cannot give consideration to TR channel testing.
Therefore, a system capable of rapidly completing the operations of testing TR channel, monitoring TR state, testing pointing accuracy, analyzing faults, testing antenna directional diagram and the like of the phased array radar in the darkroom testing process is needed to improve the testing efficiency of the darkroom radar and shorten the testing time of the darkroom of the system.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a system, a method, equipment and a storage medium for rapidly detecting a phased array radar darkroom, so that the real-time monitoring of the state of a array surface and the functions of fault judgment and isolation in the testing process of the phased array radar darkroom are realized in the testing process; the on-line resolving and issuing work of the wave control code of the transmitting channel is realized by setting frequency point and wave beam pointing information, and the random phase matching of a test array surface or a channel is realized; completing the calibration of a radar receiving channel/transmitting channel on line in an internal field test stage, and outputting an amplitude-phase error value between channels; analyzing and positioning problems in darkroom testing are realized by analyzing and displaying instruction sending information and instruction receiving information of a communication interface in real time in the debugging and testing processes of the whole machine; meanwhile, the phased array radar channel fault positioning, analysis and isolation are completed in an auxiliary mode in the using process of the whole machine. The system has the functions of phased array radar array surface monitoring, inter-channel real-time calibration, wave control code on-line real-time resolving and distributing, communication and state display, and can effectively improve the working efficiency of phased array radar darkroom testing and preparation before darkroom testing.
The purpose of the invention is realized by the following technical scheme:
a phased array radar darkroom rapid detection system comprises a radar array surface to be detected and a detection unit, wherein the radar array surface to be detected is connected with a communication unit, the detection unit comprises an array surface state monitoring module, a wave control code resolving module and an internal field channel calibration module, and the array surface state monitoring module, the wave control code resolving module and the internal field channel calibration module are respectively connected with the communication unit;
the array surface state monitoring module receives data fed back by a radar array surface to be detected through a communication unit and generates a system control instruction according to preset parameters;
the internal field channel calibration module receives data fed back by the radar array surface to be detected and returned by the array surface state monitoring module, and resolves amplitude and phase difference among the channels;
and the wave control code resolving module receives the amplitude and phase difference between the channels resolved by the internal field channel calibration module and the beam direction, frequency point and forming parameter information set by the array surface state monitoring module, and resolves the wave control code.
Furthermore, the system also comprises a display unit connected with the communication unit, wherein the display unit receives the radar array surface state information forwarded by the array surface state monitoring module, completes the state analysis and display work according to an internal communication protocol, and simultaneously synchronously completes the display of the instruction received by the phased array radar.
On the other hand, the invention also provides a rapid detection method for the phased array radar darkroom, which comprises the following steps:
receiving channel calibration, wherein the array surface state monitoring module sets transmitting frequency points and parameter information, receives received echo calibration data of corresponding channels, forwards the transmitting frequency points and the received echo calibration data to the internal field channel calibration monitoring module, and the internal field channel calibration monitoring module calculates amplitude and phase values of the corresponding channels;
the transmitting channel calibration, wherein a receiving frequency point and parameter information are set by a front surface state monitoring module, transmitting echo calibration data of a corresponding channel are received, the receiving frequency point and the transmitting echo calibration data are forwarded to an internal field channel calibration monitoring module, and the internal field channel calibration monitoring module is used for resolving an amplitude-phase value of the corresponding channel;
wave control code calculation, namely calculating and issuing the wave control code of the selected channel in real time according to the wave beam direction, the frequency point and the forming parameter information set by the array surface state monitoring module;
analyzing array surface faults, namely analyzing the array surface faults according to echo calibration data acquired in the calibration of the transmitting channel and the calibration of the receiving channel;
and completing the antenna directional pattern test work according to the corresponding beam direction and the wave control code.
Further, before the calibration of the receiving channel, the method further comprises a self-test step:
and the array surface state monitoring module issues a system power-on self-test instruction, receives corresponding state information after the self-test of the internal field channel calibration module, the wave control code resolving module, the communication unit and the display unit is finished, and enters a receiving channel calibration mode after the state information of the whole machine is confirmed to be normal.
Further, the method for calculating the amplitude and phase values of the corresponding channel comprises the following steps:
and comparing each path of signals to be calibrated according to a given calibration reference signal, giving corresponding amplitude and phase data, and realizing the calibration of the channel through multiple iterations.
Further, the comparing each path of signal to be calibrated according to the given calibration reference signal to give corresponding amplitude and phase data, and implementing the calibration of the channel through multiple iterations specifically comprises:
and the T/R component No. (m, n) calibrates the signals to be calibrated coupled by the coupling line into:
Figure BDA0003293215060000041
Figure BDA0003293215060000042
wherein α is the signal amplitude; deltanm，
Figure BDA0003293215060000043
Is a unit level independent amplitude-phase error; w is anmAnd phinmIs a magnitude-phase weighting coefficient; cnmTo calibrate the coupling ratio; u. ofs，vsWhen scanning the antenna azimuth and elevation wave beam, the phase stepping quantity between units realized by the phase shifter is 0 when the wave beam points to the normal; Ψs，
Figure BDA0003293215060000044
Pitch angle and azimuth angle when the beam points to the plane relative to the normal line respectively; dx, dy is the spacing between adjacent cells in the vertical and horizontal directions; w is adIs the Doppler frequency offset; Ψ0Is a random initial phase of the signal;
the calibration reference signal is selected from a calibrated coupling signal and is expressed as:
Figure BDA0003293215060000045
comparing the channel signal with the reference signal, and giving a calibration output result:
Pout＝Xnm/Xref；
and comparing the calibration output result with the target amplitude-phase data, and enabling the test data to trend to the target result through multiple iterations, wherein the variance meets the preset index requirement.
Further, the specific calculation method of the wave control code calculation is as follows:
let the cosine function of the direction of the target be (cos alpha)x,cosαy,cosαz) Then, the spatial phase difference between adjacent array elements is:
vertical direction:
Figure BDA0003293215060000051
horizontal direction:
Figure BDA0003293215060000052
the spatial phase difference between the (i, k) th antenna element and the (0,0) th antenna element is:
ΔΦik＝iΔΦ1+kΔΦ2；
to be at
Figure BDA0003293215060000053
The maximum value of the beam is obtained in the direction, and the pointing angle is converted into a calculation formula of pointing coefficients alpha and beta:
Figure BDA0003293215060000054
Figure BDA0003293215060000055
wherein d is1，d2The distance between adjacent antenna units in the horizontal direction and the vertical direction; the phase difference alpha and beta in the array are changed, so that the phased scanning of antenna beams can be realized;
the calculation formula of the wave control code C (i, k) is as follows:
C(i,k)＝i(α+Δα)+k(β+Δβ)+γik+φ0+φf+φT+φa
where i, k are the coordinates of the phase shifting unitAlpha and beta are pointing coefficients received by the beam control system; delta alpha and delta beta are working frequency point change phase shift compensation; gamma ik is a random feed phase compensation value; phi is a0Calibrating phase shift compensation for the channel; phi is afA beamforming phase shift magnitude; phi is aTCompensating for temperature induced phase changes; phi is aaPerforming array phase compensation on the nonlinear array surface;
when the object is a digital phase shifter, the minimum calculated phase shift amount corresponding to a case where the wave control code C (i, k) is 1 is: delta phimin＝2π/2KAnd K is the number of calculation bits of the digital phase shifter.
Further, C (i, k) is left over by 2 π when calculating the wave control code.
In another aspect, the present application provides a computer device, which includes a processor and a memory, where the memory stores a computer program, and the computer program is loaded by the processor and executed to implement any one of the above-mentioned methods for fast detection of a phased array radar darkroom.
In another aspect, the present application provides a computer-readable storage medium, in which a computer program is stored, and the computer program is loaded and executed by a processor to implement any one of the above methods for fast detection of a phased array radar darkroom.
The invention has the beneficial effects that:
the invention realizes the real-time monitoring of the array surface state and the functions of fault judgment and isolation in the testing process of the phased array radar darkroom in the testing process; the on-line resolving and issuing work of the wave control code of the transmitting channel is realized by setting frequency point and wave beam pointing information, and the random phase matching of a test array surface or a channel is realized; completing online calibration of a radar receiving channel/transmitting channel in an internal field test stage, and outputting an amplitude and phase error value between channels; the real-time display of the instruction information is transmitted and received through the communication interface in the debugging and testing processes of the whole machine, so that the analysis and the positioning of problems in darkroom testing are realized; meanwhile, the phased array radar channel fault positioning, analysis and isolation are completed in an auxiliary mode in the using process of the whole machine.
The method is suitable for all phased array radars, can effectively improve the efficiency of preparation work before radar darkroom test and darkroom test work, and assists testers to complete the work of phased array radar array surface monitoring, wave control code on-line real-time resolving and issuing, random phase matching, transceiving channel calibration, antenna directional diagram test and the like.
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Fig. 1 is a schematic structural diagram of a phased array radar darkroom rapid detection system provided in embodiment 1 of the present invention;
fig. 2 is a schematic flow chart of a method for rapidly detecting a phased array radar darkroom provided in embodiment 2 of the present invention;
fig. 3 is a schematic coordinate diagram of wave control code calculation in the phased array radar darkroom rapid detection method provided in embodiment 2 of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. 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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Currently, in the radar development process, a large amount of test work is included in preparation work before a darkroom, and specifically, the test work includes: the method comprises the following working steps of TR channel testing, TR state monitoring, pointing accuracy testing, fault analysis, antenna directional pattern testing and the like. However, the system assistance means is not available to complete the above work, and the work efficiency is low.
To address this issue, various embodiments of the phased array radar darkroom rapid detection system of the present invention are presented.
The embodiment of the invention provides a phased array radar darkroom rapid detection system, referring to fig. 1, as shown in fig. 1, the structural schematic diagram of the phased array radar darkroom rapid detection system provided by the embodiment is shown, and the system specifically comprises:
the radar array surface to be detected and the detection unit are connected with the communication unit, the detection unit comprises an array surface state monitoring module, a wave control code resolving module and an internal field channel calibration module, and the array surface state monitoring module, the wave control code resolving module and the internal field channel calibration module are respectively connected with the communication unit.
And the array surface state monitoring module receives data fed back by the radar array surface to be detected through the communication unit and generates a system control instruction according to preset parameters. The array surface state monitoring module mainly completes the functions of system self-checking, temperature inquiry, power supply control, channel selection, internal timing control and received beam pointing angle control.
Specifically, the array surface state monitoring module generates system control instructions related to system self-check, temperature query, radar power control, channel selection and internal timing control according to the setting condition of the module parameters, and sends a corresponding control instruction list to the radar control module through the communication unit, so that the power-on self-check and the periodic self-check of the whole radar are realized. And temperature monitoring and query of each subsystem module of the radar are realized in the process of power-on test. And the control of the radar transmitting power supply and the combined power supply is completed by matching with channel selection parameters, wave control codes and internal timing setting parameters, so that the control function of the direction of the whole array surface receiving wave beam is realized. Receiving data fed back by a radar front surface by using a communication unit, wherein the data comprises the following data: and the channel calibration echo data, the normal echo data and the array surface state information are respectively fed back to the internal field channel calibration module and the display unit so as to realize the internal field channel calibration, the array surface state display and the antenna directional diagram display and analysis.
The array surface state monitoring module realizes the following functions:
(1) realize outage and circular telegram function, include: a full array face power on/off function and a single channel power on/off function;
(2) reading BIT information of each component, reading corresponding BIT information through specifying a component number, and translating component fault information according to a BIT protocol of an internal component state of a specific radar system;
(3) and modifying the compensation parameters according to the specified address.
And the internal field channel calibration module receives data fed back by the radar array surface to be detected, which are fed back by the array surface state monitoring module, and calculates the amplitude and phase difference between the channels.
Specifically, the internal field channel calibration module receives channel calibration echo data returned by the array surface state monitoring module, calculates amplitude-phase coefficients of all channels, further calculates amplitude and phase differences among the channels, provides the calculated amplitude and phase differences to the wave control code calculation module, and realizes on-line real-time calculation of the wave control codes to complete radar receiving/transmitting beam pointing control and beam forming.
The internal field channel calibration monitoring module realizes the following functions:
(1) sending a calibration instruction to realize channel selection and receiving/transmitting control;
(2) receiving transmit calibration/receive calibrated baseband echo data;
(3) completing analysis of inter-channel amplitude and phase errors through a calibration algorithm;
(4) and the TR channel fault diagnosis is completed through the echo signals.
And the wave control code resolving module receives the amplitude and phase difference between the channels resolved by the internal field channel calibration module and resolves the wave control code.
Specifically, the wave control code resolving module receives the channel amplitude and phase difference obtained by resolving the internal field channel calibration module, and accomplishes resolving work of the wave control code in real time by setting frequency points, beam pointing and forming parameter information.
The wave control code on-line real-time resolving module realizes the following functions:
(1) receiving an instruction corresponding to wave control, comprising: frequency point information, alpha codes, beta codes, receiving/transmitting channel amplitude and phase monitoring results and forming parameters;
(2) the real-time resolving function of the wave control codes of all channels is completed;
(3) and finishing the issuing work of the wave control code according to the control command.
A communication unit: the communication between the system and the radar is realized, and the communication mainly comprises the issuing of a control instruction, and the receiving and forwarding of echo number data and state data. The communication can be realized by adopting a network interface and a synchronous serial port.
A display unit: the display unit receives the radar array surface state information forwarded by the array surface state monitoring module, completes the state analysis and display work according to the internal communication protocol, and simultaneously completes the display of the instruction received by the phased array radar.
The display unit realizes the following functions:
(1) the display unit completes the radar array surface state information display function;
(2) the display unit completes the instruction display function sent by each module;
(3) the display unit performs the function of displaying the instructions received from the phased array radar.
The phased array radar darkroom rapid detection system provided by the embodiment can effectively improve the efficiency of preparation work and darkroom test work before radar darkroom test, and assists testers to complete the work of phased array radar array surface monitoring, wave control code online real-time resolving and issuing, random phase matching, transceiving channel calibration, antenna directional diagram test and the like.
Example 2
Referring to fig. 2, as shown in fig. 2, a schematic flow chart of the phased array radar darkroom rapid detection method provided in this embodiment is shown. The method adopts the rapid detection system of the phased array radar darkroom to realize rapid detection of the phased array radar darkroom, and specifically comprises the following steps:
step S100: and the receiving channel calibration, the array surface state monitoring module sets transmitting frequency points and parameter information, receives the received echo calibration data of the corresponding channel, forwards the transmitting frequency points and the received echo calibration data to the internal field channel calibration monitoring module, and the internal field channel calibration monitoring module calculates the amplitude and phase values of the corresponding channel.
As a specific implementation manner, in the receiving channel calibration mode, the array surface state monitoring module sets a corresponding transmitting frequency point, a triggering time, an attenuation coefficient and a channel selection condition, receives the received echo calibration data of a corresponding channel, forwards the corresponding frequency point and the channel received echo data to the internal field channel calibration monitoring module, and the internal field channel calibration monitoring module calculates the amplitude and phase values of the channel according to the channel calibration algorithm provided by the method. An operator can set by repeatedly using the array surface state monitoring module, and the amplitude and phase values of the corresponding channels and frequency points are solved by using the internal field channel calibration monitoring module until all the frequency points and all the receiving channels are covered. And the corresponding amplitude and phase values are normalized under the selected reference channel to obtain corresponding normalized amplitude and phase values. And finishing the calibration of the radar receiving channel.
S200: and calibrating the transmitting channel, setting receiving frequency points and parameter information by the array surface state monitoring module, receiving transmitting echo calibration data of the corresponding channel, forwarding the receiving frequency points and the transmitting echo calibration data to the internal field channel calibration monitoring module, and resolving the amplitude and phase values of the corresponding channel by the internal field channel calibration monitoring module.
As a specific implementation mode, the transmitting channel calibration mode is similar to the receiving channel calibration mode, the array surface state monitoring module sets corresponding receiving frequency points, trigger duration, attenuation coefficients and channel selection conditions, receives transmitting echo calibration data of corresponding channels, forwards the corresponding frequency points and the channel transmitting echo data to the internal field channel calibration monitoring module, and the internal field channel calibration monitoring module resolves the amplitude and phase values of the channel according to the channel calibration algorithm provided by the method. An operator can set by repeatedly using the array surface state monitoring module, and the amplitude and phase values of the corresponding channels and frequency points are solved by using the internal field channel calibration monitoring module until all the frequency points and the transmitting channels are covered. And the corresponding amplitude and phase values are normalized under the selected reference channel to obtain corresponding normalized amplitude and phase values. And finishing the calibration of the radar transmitting channel.
The inter-channel amplitude and phase calibration algorithm provided by the embodiment is as follows:
and comparing each path of signals to be calibrated by using a given calibration reference signal, giving corresponding amplitude and phase data, and realizing the calibration of the channel through multiple iterations. Corresponding to the T/R component with the (m, n) th number, the calibration signals coupled by the calibration coupling lines are as follows:
Figure BDA0003293215060000121
wherein, in the formula: α is the signal amplitude; deltanm，
Figure BDA0003293215060000122
Is a unit level independent amplitude-phase error; w is anmAnd phinmIs a magnitude-phase weighting coefficient; cnmTo calibrate the coupling ratio; u. ofs，vsThe amount of phase stepping between elements, achieved by the phase shifters, when scanning for antenna azimuth and elevation beams, is 0 when the beams point to the normal.
Figure BDA0003293215060000123
Figure BDA0003293215060000124
In the formula: Ψs，
Figure BDA0003293215060000125
Pitch angle and azimuth angle when the beam points to the plane relative to the normal line respectively; dx, dy is the spacing between adjacent cells in the vertical and horizontal directions; w is adIs the Doppler frequency offset; Ψ0Is the random initial phase of the signal.
The calibrated reference signal is selected from the calibrated coupled signals and is represented as
Figure BDA0003293215060000126
Comparing the channel signal with the reference signal, and giving a calibration output result:
Pout＝Xnm/Xref
and comparing the result with target amplitude-phase data, and enabling the test data to trend to the target result through a plurality of iterations, wherein the variance meets the index requirement.
S300: and calculating the wave control code, namely calculating and issuing the wave control code of the selected channel in real time according to the wave beam direction, the frequency point and the forming parameter information set by the array surface state monitoring module.
As a specific implementation manner, after the receiving calibration and the transmitting calibration are completed, the wave control code of the selected channel can be calculated and issued in real time according to the set beam pointing information set by the wavefront state monitoring module. According to the wave control code resolving algorithm provided by the invention, the online real-time stage of the wave control code is realized, and the phase matching work of the phased array radar array surface is realized by transmitting the wave control code under the communication unit.
The wave control code calculation method provided by the embodiment is as follows:
let the cosine function of the direction of the target be (cos alpha)x,cosαy,cosαz) Then, the spatial phase difference between adjacent array elements is:
vertical direction:
Figure BDA0003293215060000131
horizontal direction:
Figure BDA0003293215060000132
the spatial phase difference between the (i, k) th antenna element and the (0,0) th antenna element is:
ΔΦik＝iΔΦ1+kΔΦ2
to be at
Figure BDA0003293215060000133
The maximum value of the beam is obtained in the direction, and the pointing angle is converted into a calculation formula of pointing coefficients alpha and beta:
Figure BDA0003293215060000141
Figure BDA0003293215060000142
wherein d is1，d2The distance between adjacent antenna elements in the horizontal and vertical directions. Phase control scanning of antenna beams can be achieved by changing the phase differences alpha and beta in the array.
Formula for calculating wave control code C (i, k)
C(i,k)＝i(α+Δα)+k(β+Δβ)+γik+φ0+φf+φT+φa
Wherein i, k are coordinates of the phase shift unit, and α, β are pointing coefficients received by the beam control system;
delta alpha and delta beta are working frequency point change phase shift compensation;
γikis a random feed phase compensation value;
φ0calibrating phase shift compensation for the channel;
φfa beamforming phase shift magnitude;
φTcompensating for temperature induced phase changes;
φaand performing array phase compensation on the nonlinear array surface.
When the object is a digital phase shifter, the minimum calculated phase shift amount corresponding to a case where the wave control code C (i, k) is 1 is:
ΔΦmin＝2π/2K
k is the number of bits of the digital phase shifter. When actually calculating the wave control code, C (i, k) is left over by 2 pi.
S400: and analyzing the faults of the array surface, namely analyzing the faults of the array surface according to the echo calibration data acquired in the calibration of the transmitting channel and the calibration of the receiving channel.
S500: and completing the antenna directional pattern test work according to the corresponding beam direction and the wave control code.
The method for rapidly detecting the phased array radar darkroom provided by the embodiment can effectively improve the efficiency of preparation work and darkroom test work before radar darkroom test, and assist testers in completing the work of phased array radar array surface monitoring, wave control code on-line real-time resolving and issuing, random phase matching, transceiving channel calibration, antenna directional diagram test and the like.
Compared with the prior art, the invention has the following advantages:
(1) the invention can realize the real-time monitoring of the array surface state and the functions of fault judgment and isolation in the testing process of the phased array radar darkroom.
(2) The invention can complete the on-line resolving and issuing work of the wave control code of the transmitting channel and realize the random phase matching of the test array surface or the channel.
(3) The invention can complete the on-line calibration of the radar receiving channel/transmitting channel and output the amplitude and phase error value between the channels.
(4) The invention can complete the real-time display of the instruction information sent and received by the communication interface, and is convenient for analyzing and positioning the problems in darkroom testing.
Example 3
The preferred embodiment provides a computer device, which can implement the steps in any embodiment of the method for rapidly detecting a phased array radar darkroom provided in the embodiment of the present application, and therefore, the beneficial effects of the method for rapidly detecting a phased array radar darkroom provided in the embodiment of the present application can be achieved, which are detailed in the foregoing embodiment and will not be described herein again.
Example 4
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor. To this end, the present invention provides a storage medium, in which a plurality of instructions are stored, where the instructions can be loaded by a processor to execute the steps of any embodiment of the method for fast detecting a darkroom of a phased array radar provided by the present invention.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the storage medium may execute the steps in any of the embodiments of the method for quickly detecting a phased array radar darkroom provided by the embodiments of the present invention, the beneficial effects that can be achieved by any of the methods for quickly detecting a phased array radar darkroom provided by the embodiments of the present invention can be achieved, which are described in detail in the foregoing embodiments and will not be described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A phased array radar darkroom rapid detection system comprises a radar array surface to be detected and a detection unit, and is characterized in that the radar array surface to be detected is connected with a communication unit, the detection unit comprises an array surface state monitoring module, a wave control code resolving module and an internal field channel calibration module, and the array surface state monitoring module, the wave control code resolving module and the internal field channel calibration module are respectively connected with the communication unit;
the array surface state monitoring module receives data fed back by a radar array surface to be detected through a communication unit and generates a system control instruction according to preset parameters;
the internal field channel calibration module receives data fed back by the radar array surface to be detected and returned by the array surface state monitoring module, and resolves amplitude and phase difference among the channels;
and the wave control code resolving module receives the amplitude and phase difference between the channels resolved by the internal field channel calibration module and the beam direction, frequency point and forming parameter information set by the array surface state monitoring module, and resolves the wave control code.
2. The phased array radar darkroom rapid detection system of claim 1, further comprising a display unit connected with the communication unit, wherein the display unit receives the radar front state information forwarded by the front state monitoring module, and completes the state analysis and display work according to the internal communication protocol, and simultaneously completes the display of the command received by the phased array radar.
3. A quick detection method for a phased array radar darkroom is characterized by comprising the following steps:
receiving channel calibration, wherein the array surface state monitoring module sets transmitting frequency points and parameter information, receives received echo calibration data of corresponding channels, forwards the transmitting frequency points and the received echo calibration data to the internal field channel calibration monitoring module, and the internal field channel calibration monitoring module calculates amplitude and phase values of the corresponding channels;
the transmitting channel calibration, wherein a receiving frequency point and parameter information are set by a front surface state monitoring module, transmitting echo calibration data of a corresponding channel are received, the receiving frequency point and the transmitting echo calibration data are forwarded to an internal field channel calibration monitoring module, and the internal field channel calibration monitoring module is used for resolving an amplitude-phase value of the corresponding channel;
wave control code calculation, namely calculating and issuing the wave control code of the selected channel in real time according to the wave beam direction, the frequency point and the forming parameter information set by the array surface state monitoring module;
analyzing array surface faults, namely analyzing the array surface faults according to echo calibration data acquired in the calibration of the transmitting channel and the calibration of the receiving channel;
and completing the antenna directional pattern test work according to the corresponding beam direction and the wave control code.
4. The phased array radar darkroom rapid detection method of claim 3, further comprising a self-test step before the calibration of the receiving channel:
and the array surface state monitoring module issues a system power-on self-test instruction, receives corresponding state information after the self-test of the internal field channel calibration module, the wave control code resolving module, the communication unit and the display unit is finished, and enters a receiving channel calibration mode after the state information of the whole machine is confirmed to be normal.
5. The phased array radar darkroom rapid detection method of claim 3, wherein the method for solving the amplitude and phase values of the corresponding channel comprises the following steps:
and comparing each path of signals to be calibrated according to a given calibration reference signal, giving corresponding amplitude and phase data, and realizing the calibration of the channel through multiple iterations.
6. The phased array radar darkroom rapid detection method according to claim 5, wherein the calibration reference signal is given, each path of signal to be calibrated is compared, corresponding amplitude and phase data is given, and the calibration of the channel is realized through a plurality of iterations, specifically:
and the T/R component No. (m, n) calibrates the signals to be calibrated coupled by the coupling line into:
Figure FDA0003293215050000021
wherein α is the signal amplitude; deltanm，
Figure FDA0003293215050000022
Is a unit level independent amplitude-phase error; w is anmAnd phinmIs a magnitude-phase weighting coefficient; cnmTo calibrate the coupling ratio; u. ofs，vsWhen scanning the antenna azimuth and elevation wave beam, the phase stepping quantity between units realized by the phase shifter is 0 when the wave beam points to the normal; Ψs，
Figure FDA0003293215050000031
Pitch angle and azimuth angle when the beam points to the plane relative to the normal line respectively; dx, dy is the spacing between adjacent cells in the vertical and horizontal directions; w is adIs the Doppler frequency offset; Ψ0Is a random initial phase of the signal;
the calibration reference signal is selected from a calibrated coupling signal and is expressed as:
Figure FDA0003293215050000032
comparing the channel signal with the reference signal, and giving a calibration output result:
Pout＝Xnm/Xref；
and comparing the calibration output result with the target amplitude-phase data, and enabling the test data to trend to the target result through multiple iterations, wherein the variance meets the preset index requirement.
7. The phased array radar darkroom rapid detection method of claim 3, wherein the specific calculation method of the wave control code calculation is as follows:
let the cosine function of the direction of the target be (cos alpha)x,cosαy,cosαz) Then, the spatial phase difference between adjacent array elements is:
vertical direction:
Figure FDA0003293215050000033
horizontal direction:
Figure FDA0003293215050000034
the spatial phase difference between the (i, k) th antenna element and the (0,0) th antenna element is:
ΔΦik＝iΔΦ1+kΔΦ2；
to be at
Figure FDA0003293215050000035
The maximum value of the beam is obtained in the direction, and the pointing angle is converted into a calculation formula of pointing coefficients alpha and beta:
Figure FDA0003293215050000041
Figure FDA0003293215050000042
wherein d is1，d2The distance between adjacent antenna units in the horizontal direction and the vertical direction; the phase difference alpha and beta in the array are changed, so that the phased scanning of antenna beams can be realized;
the calculation formula of the wave control code C (i, k) is as follows:
C(i,k)＝i(α+Δα)+k(β+Δβ)+γik+φ0+φf+φT+φa
wherein i, k are coordinates of the phase shift unit, and α, β are pointing coefficients received by the beam control system; delta alpha and delta beta are working frequency point change phase shift compensation; gamma rayikIs a random feed phase compensation value; phi is a0Calibrating phase shift compensation for the channel; phi is afA beamforming phase shift magnitude; phi is aTCompensating for temperature induced phase changes; phi is aaPerforming array phase compensation on the nonlinear array surface;
when the object is a digital phase shifter, the minimum calculated phase shift amount corresponding to a case where the wave control code C (i, k) is 1 is: delta phimin＝2π/2KAnd K is the number of calculation bits of the digital phase shifter.
8. The phased array radar darkroom fast detection method of claim 7, wherein C (i, k) is left at 2 pi when calculating the wave control code.
9. A computer device comprising a processor and a memory, the memory having stored thereon a computer program that is loaded and executed by the processor to implement the method of phased array radar darkroom fast detection according to any one of claims 3 to 8.
10. A computer-readable storage medium, wherein a computer program is stored in the storage medium, and the computer program is loaded and executed by a processor to implement the phased array radar darkroom fast detection method according to any one of claims 3 to 8.
CN202111171103.0A 2021-10-08 2021-10-08 Phased array radar darkroom rapid detection system, method, equipment and storage medium Pending CN114047485A (en)

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CN116827453A (en) * 2023-08-29 2023-09-29 成都智芯雷通微系统技术有限公司 Phased array antenna real-time self-calibration compensation system and method
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Publication number Priority date Publication date Assignee Title
CN116827453A (en) * 2023-08-29 2023-09-29 成都智芯雷通微系统技术有限公司 Phased array antenna real-time self-calibration compensation system and method
CN116827453B (en) * 2023-08-29 2023-11-10 成都智芯雷通微系统技术有限公司 Phased array antenna real-time self-calibration compensation system and method
CN117214844A (en) * 2023-11-08 2023-12-12 北京清雷科技有限公司 Medical radar equipment detecting system
CN117214844B (en) * 2023-11-08 2024-02-13 北京清雷科技有限公司 Medical radar equipment detecting system
CN117233716A (en) * 2023-11-16 2023-12-15 中科亿海微电子科技（苏州）有限公司 Method and device for controlling and testing beam of satellite-borne phased array antenna
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