CN111257883A - Calibration device and method for phased array weather radar system - Google Patents
Calibration device and method for 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
- 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
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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
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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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
- G01S2013/0236—Special technical features
- G01S2013/0245—Radar with phased array antenna
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a calibration device and a calibration method for a phased array weather radar system, wherein the calibration device comprises the following steps: the frequency source combination module is used for generating a calibration pulse signal in a preset period; the antenna array module is used for receiving echo signals and calibration pulse signals of the phased array weather radar system in real time; the signal processing module is used for acquiring a standard value of the calibration pulse signal and obtaining an echo calibration signal compensation value according to the calibration pulse signal and the standard value of the calibration pulse signal; and the digital transceiving module is used for receiving the echo calibration signal compensation value and calibrating the echo signal according to the echo calibration signal compensation value to obtain the calibrated echo signal. The calibration device and the calibration method of the phased array weather radar system can generate the calibration pulse signal, and carry out real-time calibration on the echo signals received by all channels in the phased array weather radar system according to the calibration pulse signal and the calibration pulse signal standard value, so that the detection accuracy of the phased array weather radar system is improved.
Description
Technical Field
The invention relates to the field of radar detection, in particular to a calibration device and method for a phased array weather radar system.
Background
Compared with the traditional system weather radar, the phased array weather radar has the advantages of high time resolution, high flexibility and the like, but the system adopts the phased array system, and certain technical complexity exists in system calibration, waveguide antenna arrays, digital transceiver modules, data synthesis and signal processing. In order to accurately acquire information such as intensity, three-dimensional speed and the like of small-scale system disaster weather (tornado, hailstone, rainstorm and the like) with fast change and large intensity in an action range and realize fine detection of the targets, the phased array weather phased array radar system is required to have real-time and perfect calibration functions.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that echo signals are deviated when a phased array weather radar system in the prior art is used for detecting under the condition of small-scale system disaster weather with fast change and high intensity, so that the calibration device and the calibration method of the phased array weather radar system are provided.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a calibration apparatus for a phased array weather radar system, including: the frequency source combination module is used for generating a calibration pulse signal in a preset period; the antenna array module is used for receiving echo signals and calibration pulse signals of the phased array weather radar system in real time; the signal processing module is used for acquiring a standard value of the calibration pulse signal and obtaining an echo calibration signal compensation value according to the calibration pulse signal and the standard value of the calibration pulse signal; and the digital transceiving module is used for receiving the echo calibration signal compensation value and calibrating the echo signal according to the echo calibration signal compensation value to obtain the calibrated echo signal.
In an embodiment, the calibration apparatus for a phased array weather radar system according to an embodiment of the present invention further includes: and the power distribution network module is respectively connected with the digital transceiving module and the signal processing module and is used for realizing signal transmission among the frequency source combination module, the digital transceiving module and the signal processing module.
In an embodiment, the signal processing module is further configured to generate a synchronization pulse trigger signal, and the frequency source combination module generates a synchronization pulse according to the synchronization pulse trigger signal and sends the synchronization pulse to the signal processing module.
In one embodiment, the signal processing module generates a synchronization signal according to the received synchronization pulse and sends the synchronization signal to the digital transceiver module, and the synchronization signal is used for controlling the frequency source module, the digital transceiver module and the signal processing module to synchronously work.
In one embodiment, the digital transceiver module receives the calibration pulse signal and the echo signal in real time by using a periodic full sampling technique, and calibrates the echo signal according to a compensation value of the received echo calibration signal.
In one embodiment, calibrating the pulse signal standard value comprises: the wave form amplitude standard value and wave form phase place standard value, the echo marks the signal compensation value and includes: a waveform amplitude compensation value and a waveform phase compensation value.
In an embodiment, the digital transceiver module is further configured to perform digital quantization processing on the calibration pulse signal and the echo signal received in real time, respectively, to obtain the calibration pulse signal and the echo signal after the digital quantization processing.
In a second aspect, an embodiment of the present invention provides a calibration method for a phased array weather radar system, including the following steps: generating a calibration pulse signal within a preset period; acquiring an echo signal and a standard value of a calibration pulse signal of a phased array weather radar system; obtaining an echo calibration signal compensation value according to the calibration pulse signal and the calibration pulse signal standard value; and calibrating the echo signal according to the echo calibration signal compensation value to obtain the calibrated echo signal.
In an embodiment, after the step of obtaining the echo signal and the standard value of the calibration pulse signal of the phased array weather radar system, before the step of obtaining the compensation value of the echo calibration signal according to the calibration pulse signal and the standard value of the calibration pulse signal, the method further includes: and respectively carrying out digital quantization processing on the calibration pulse signal and the echo signal to obtain the calibration pulse signal and the echo signal after the digital quantization processing.
In a third aspect, an embodiment of the present invention provides a computer device, including: the apparatus includes at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to cause the at least one processor to perform a calibration method for a phased array weather radar system according to a second aspect of embodiments of the present invention.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the calibration method of the phased array weather radar system according to the second aspect of the embodiment of the present invention.
The technical scheme of the invention has the following advantages:
1. the calibration device and the calibration method for the phased array weather radar system generate the calibration pulse signal, and perform calibration on the echo signals received by all channels in the phased array weather radar system according to the calibration pulse signal and the calibration pulse signal standard value, so that the detection accuracy of the phased array weather radar system is improved.
2. The calibration device and the calibration method of the phased array weather radar system adopt a periodic full sampling technology, obtain echo signals in real time in each sampling period, generate calibration pulse signals, and calibrate the echo signals, so that the detection accuracy of the phased array weather radar system in a severe weather environment is further improved; and each module in the calibration device synchronously works, so that calibration errors are reduced.
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 schematic diagram of a specific example of a calibration device of a phased array weather radar system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another specific example of a calibration apparatus for a phased array weather radar system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a pulse timing optimization design according to an embodiment of the present invention;
fig. 4 is a flowchart of a specific example of a calibration method of a phased array weather radar system according to an embodiment of the present invention;
fig. 5 is a composition diagram of a specific example of an electronic device according to an 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 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.
Example 1
The embodiment of the invention provides a calibration device of a phased array weather radar system, which is applied to the field of radar detection and comprises the following components as shown in figure 1:
and the frequency source combination module 1 is used for generating a calibration pulse signal in a preset period.
As shown in fig. 2, a calibration channel unit is disposed in the frequency source combination module 1, and the calibration pulse signal can be coupled into the receiving loop of the antenna array module 2 through the coupler of the antenna array module 2. In the embodiment of the invention, a calibration pulse signal is generated by the frequency source combination module 1 in each pulse repetition period, and the calibration pulse signal can be generated and controlled by using a pulse time sequence optimization design method according to the synchronous working time and the working period of each module in the calibration device.
And the antenna array face module 2 is used for receiving echo signals and calibration pulse signals of the phased array weather radar system in real time.
The calibration device of the phased array weather radar system provided by the embodiment of the invention adopts a full-digital and full-coherent Doppler technology, and is used for electrically scanning in a pitching direction and mechanically scanning in an azimuth direction, and receiving echo signals in real time. The antenna array module 2 sends the echo signal and the calibration pulse signal of the real-time receiving phased array weather radar system to the digital transceiver module 4.
And the signal processing module 3 is used for acquiring a standard value of the calibration pulse signal and obtaining an echo calibration signal compensation value according to the calibration pulse signal and the standard value of the calibration pulse signal. The calibration pulse signal standard value comprises: the wave form amplitude standard value and wave form phase place standard value, the echo marks the signal compensation value and includes: a waveform amplitude compensation value and a waveform phase compensation value.
And the digital transceiver module 4 is used for receiving the echo calibration signal compensation value and calibrating the echo signal according to the echo calibration signal compensation value to obtain the calibrated echo signal. The digital transceiver module 4 receives the calibration pulse signal, the echo signal and the echo calibration signal compensation value in real time by using a periodic full sampling technology, and calibrates the echo signal. The digital transceiver module 4 is further configured to perform digital quantization processing on the calibration pulse signal and the echo signal received in real time, respectively, to obtain a calibration pulse signal and an echo signal after the digital quantization processing.
In the embodiment of the invention, the standard value of the calibration pulse signal is obtained by performing near field test in a darkroom, can reflect the standard characteristic of the whole phased array weather radar system, but only can reflect the amplitude phase test value in a certain state, so that the phased array weather radar system needs to calibrate on the basis of the standard value when in actual use, namely, the echo signal is calibrated, and the calibrated echo signal can reflect the system performance under a real condition.
The digital transceiver module 4 samples the signal received by the antenna array module 2 in the whole period, and performs digital quantization processing on the received echo signal and the calibration pulse signal to obtain the echo signal and the calibration pulse signal after the digital quantization processing, the signal processing module 3 obtains an echo calibration signal compensation value according to the echo signal and the calibration pulse signal after the digital quantization processing, the digital transceiver module 4 corrects the echo signal according to the echo calibration signal compensation value to obtain the echo signal after the calibration, and thus calibration of a receiving channel of the weather phased array weather radar system is realized.
The frequency source combination 1 is used to generate a calibration signal and the digital transceiver module 4 is used to receive an echo signal, as shown in fig. 3, T1 represents a synchronization signal of the phased array weather radar system, the signal is generated by the frequency source combination module 1, and T2 represents a time interval between the system transmitting a control word and receiving a loopback word, for example, about 400 us. T isFSIndicating the time, T, of the calibration pulse signal emitted by the frequency source combination module 1TRThe transmitting waveform time and the sampling time of the digital transceiver module 4 are represented, when receiving and sampling, a periodic full sampling technology is adopted, the calibration pulse signal and echo signal data are all collected, and the phased array weather radar system generates a calibration pulse T by the frequency source combination module 1 in each pulse repetition periodFS。
In a specific embodiment, the specific calibration process is as follows: phase compensation of echo signals
Including phase reference values
And phase correction value
Two parts are shown in formula (1).
Wherein the phase standard value
Inherent phase value and phase correction value of phased array weather radar system obtained by measurement in antenna darkroom
To calibrate the pulse signal phase.
Amplitude compensation A (n) of echo signal includes amplitude standard value AR1And amplitude correction value AR2Two parts are shown in formula (2).
Α(n)＝1/(ΑR1·ΑR2)·η (2)
Wherein, the amplitude standard value AR1For the inherent amplitude of the phased array weather radar system, the purpose of the coefficient η is to normalize the minimum value of the amplitude compensation value, and the calculation method is as follows:
η＝max(ΑR1·ΑR2) (3)
by the formulas (1) to (3), the actual direction f (n) of the antenna in the phased array weather radar system can be obtained by calibrating the echo signal, and is shown as the formula (4):
wherein, ω isc＝2πfc(fcIs the sampling frequency), and n is the number of channels of the digital transceiver module 4.
The calibration device of the phased array weather radar system provided by the embodiment of the invention generates the calibration pulse signal, and calibrates the echo signals received by all channels in the phased array weather radar system according to the calibration pulse signal and the calibration pulse signal standard value, so that the detection accuracy of the phased array weather radar system is improved.
In a specific embodiment, as shown in fig. 2, the calibration device of the phased array weather radar system further includes:
and the power distribution network module 5 is respectively connected with the digital transceiver module 4 and the signal processing module 3, and is used for realizing signal transmission among the frequency source combination module 1, the digital transceiver module 4 and the signal processing module 3.
The power distribution network module 5 is a power distribution network, and as shown in fig. 2, includes a local oscillator power divider, a two local oscillator power divider, a clock power divider (80MHz), and an optical power divider. The frequency source combination module 1 generates a local oscillator, a second local oscillator and a clock signal, and sends the signals to the power distribution network module 5, the power distribution network module 5 provides the required radio frequency signals for the digital transceiver module 4, and the optical power divider provides the control signals for the digital transceiver module 4.
After the signal processing combination module calculates the amplitude value and the phase value of the calibration signal, the echo calibration signal compensation value is obtained according to the standard amplitude value and the phase of the calibration pulse signal, written in the control word and sent to the digital transceiver module 4 through the power division network module 5.
In a specific embodiment, the signal processing module 3 is further configured to generate a synchronization pulse trigger signal, and the frequency source combination module 1 generates a synchronization pulse according to the synchronization pulse trigger signal and sends the synchronization pulse to the signal processing module 3.
In an embodiment, the signal processing module 3 generates a synchronization signal according to the received synchronization pulse and sends the synchronization signal to the digital transceiver module 4, where the synchronization signal is used to control the frequency source module, the digital transceiver module 4, and the signal processing module 3 to operate synchronously.
The phased array weather radar system adopts synchronous signals to realize synchronous work of the frequency source combination module 1, the digital transceiver module 4 and the signal processing module 3, synchronous pulse trigger signals are generated through the control signal processing module 3, the frequency source combination module 1 generates synchronous pulses according to the synchronous pulse trigger signals and sends the synchronous pulses to the signal processing module 3, the signal processing module 3 generates synchronous signals according to the synchronous pulses and sends the synchronous signals to the digital transceiver module 4 through the power distribution network module 5, and therefore the phased array weather radar system has a calibration function in each working period and each pulse repetition period.
The calibration device of the phased array weather radar system provided by the embodiment of the invention generates the calibration pulse signal, and carries out real-time calibration on the echo signals received by all channels in the phased array weather radar system according to the calibration pulse signal and the calibration pulse signal standard value, so that the detection accuracy of the phased array weather radar system is improved; by adopting a periodic full sampling technology, echo signals are acquired in real time in each sampling period, calibration pulse signals are generated, and the echo signals are calibrated, so that the detection accuracy of the phased array weather radar system in a severe weather environment is further improved; and each module in the calibration device synchronously works, so that calibration errors are reduced.
Example 2
The embodiment of the invention provides a calibration method of a phased array weather radar system, which comprises the following steps as shown in figure 4:
step S1: and generating a calibration pulse signal within a preset period.
Step S2: and acquiring an echo signal and a standard value of a calibration pulse signal of the phased array weather radar system.
Step S3: and obtaining an echo calibration signal compensation value according to the calibration pulse signal and the calibration pulse signal standard value.
Step S4: and calibrating the echo signal according to the echo calibration signal compensation value to obtain the calibrated echo signal.
In an embodiment, after the step of obtaining the echo signal and the standard value of the calibration pulse signal of the phased array weather radar system, before the step of obtaining the compensation value of the echo calibration signal according to the calibration pulse signal and the standard value of the calibration pulse signal, the method further includes:
and respectively carrying out digital quantization processing on the calibration pulse signal and the echo signal to obtain the calibration pulse signal and the echo signal after the digital quantization processing.
The embodiment of the invention adopts a periodic full sampling technology and a pulse optimization design method to generate a calibration pulse signal and obtain an echo signal and a calibration pulse signal standard value of a phased array weather radar system, the calibration pulse signal standard value is obtained by performing near field test in a darkroom, the calibration pulse signal and the echo signal are subjected to digital quantization processing to obtain the amplitude and the phase of a calibration pulse signal waveform, an echo calibration signal compensation value is obtained according to the calibration pulse signal standard value, and the echo signal is calibrated according to the echo calibration signal compensation value to obtain an echo signal after calibration.
According to the calibration method of the phased array weather radar system, provided by the embodiment of the invention, the frequency source combination module is used for generating the calibration pulse signal in real time, and the echo signals received by all channels in the phased array weather radar system are calibrated in real time according to the calibration pulse signal and the calibration pulse signal standard value, so that the detection accuracy of the phased array weather radar system is improved; by adopting a periodic full sampling technology, echo signals are acquired in real time in each sampling period, calibration pulse signals are generated, and the echo signals are calibrated, so that the detection accuracy of the phased array weather radar system in a severe weather environment is further improved; and each module in the calibration device synchronously works, so that calibration errors are reduced.
Example 3
An embodiment of the present invention provides a computer device, as shown in fig. 5, including: at least one processor 401, such as a CPU (Central Processing Unit), at least one communication interface 403, memory 404, and at least one communication bus 402. Wherein a communication bus 402 is used to enable connective communication between these components. The communication interface 403 may include a Display (Display) and a Keyboard (Keyboard), and the optional communication interface 403 may also include a standard wired interface and a standard wireless interface. The Memory 404 may be a RAM (random Access Memory) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The memory 404 may optionally be at least one memory device located remotely from the processor 401. Wherein the processor 401 may perform the calibration method of the phased array weather radar system of embodiment 2. A set of program codes is stored in the memory 404 and the processor 401 invokes the program codes stored in the memory 404 for performing the calibration method of the phased array weather radar system of embodiment 2.
The communication bus 402 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The communication bus 402 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one line is shown in FIG. 5, but this does not represent only one bus or one type of bus.
The memory 404 may include a volatile memory (RAM), such as a random-access memory (RAM); the memory may also include a non-volatile memory (english: non-volatile memory), such as a flash memory (english: flash memory), a hard disk (english: hard disk drive, abbreviation: HDD), or a solid-state drive (english: SSD); the memory 404 may also comprise a combination of memories of the kind described above.
The processor 401 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.
The processor 401 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The aforementioned PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.
Optionally, the memory 404 is also used to store program instructions. The processor 401 may call program instructions to implement the calibration method of the phased array weather radar system in embodiment 2 as described in this application.
An embodiment of the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored on the computer-readable storage medium, and the computer-executable instructions may execute the calibration method of the phased array weather radar system in embodiment 2. 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 of the invention may be made without departing from the spirit or scope of the invention.
Claims (11)
1. A calibration device for a phased array weather radar system, comprising:
the frequency source combination module is used for generating a calibration pulse signal in a preset period;
the antenna array surface module is used for receiving echo signals of the phased array weather radar system and the calibration pulse signals in real time;
the signal processing module is used for acquiring a standard value of the calibration pulse signal and obtaining an echo calibration signal compensation value according to the calibration pulse signal and the standard value of the calibration pulse signal;
and the digital transceiver module is used for receiving the echo calibration signal compensation value and calibrating the echo signal according to the echo calibration signal compensation value to obtain the calibrated echo signal.
2. The calibration device for a phased array weather radar system as claimed in claim 1, further comprising:
and the power distribution network module is respectively connected with the digital receiving and transmitting module and the signal processing module and is used for realizing signal transmission among the frequency source combination module, the digital receiving and transmitting module and the signal processing module.
3. The calibration apparatus for a phased array weather radar system as claimed in claim 1, wherein the signal processing module is further configured to generate a synchronization pulse trigger signal, and the frequency source combination module generates a synchronization pulse according to the synchronization pulse trigger signal and transmits the synchronization pulse to the signal processing module.
4. The calibration device for the phased array weather radar system as claimed in claim 2, wherein the signal processing module generates a synchronization signal according to the received synchronization pulse and transmits the synchronization signal to the digital transceiver module, and the synchronization signal is used for controlling the frequency source module, the digital transceiver module and the signal processing module to operate synchronously.
5. The calibration device for the phased array weather radar system as claimed in claim 1, wherein the digital transceiver module receives the calibration pulse signal and the echo signal in real time by using a full sampling period technique, and calibrates the echo signal according to the compensation value of the received echo calibration signal.
6. The calibration apparatus for a phased array weather radar system as claimed in any one of claims 1 to 5, wherein the calibration pulse signal calibration values comprise: the waveform amplitude standard value and the waveform phase standard value, the echo calibration signal compensation value comprises: a waveform amplitude compensation value and a waveform phase compensation value.
7. The calibration device for the phased array weather radar system as claimed in claim 6, wherein the digital transceiver module is further configured to perform digital quantization processing on the calibration pulse signal and the echo signal received in real time, respectively, so as to obtain the calibration pulse signal and the echo signal after the digital quantization processing.
8. A calibration method of a phased array weather radar system is characterized by comprising the following steps:
generating a calibration pulse signal within a preset period;
acquiring an echo signal and a standard value of a calibration pulse signal of a phased array weather radar system;
obtaining an echo calibration signal compensation value according to the calibration pulse signal and the calibration pulse signal standard value;
and calibrating the echo signal according to the echo calibration signal compensation value to obtain the calibrated echo signal.
9. The method of calibrating a phased array weather radar system, as claimed in claim 8, wherein after the step of obtaining the echo signal and the calibration pulse signal calibration standard value of the phased array weather radar system, and before the step of obtaining the echo calibration signal compensation value based on the calibration pulse signal and the calibration pulse signal standard value, the method further comprises:
and respectively carrying out digital quantization processing on the calibration pulse signal and the echo signal to obtain the calibration pulse signal and the echo signal after the digital quantization processing.
10. A computer device, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the method of calibrating a phased array weather radar system of claim 8 or 9.
11. A computer readable storage medium storing computer instructions for causing a computer to perform the method of calibrating a phased array weather radar system as claimed in claim 8 or 9.
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| CN202010090652.4A CN111257883A (en) | 2020-02-13 | 2020-02-13 | Calibration device and method for phased array weather radar system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112014812A (en) * | 2020-09-01 | 2020-12-01 | 航天新气象科技有限公司 | Phase-controlled gust profile radar calibration system and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110273326A1 (en) * | 2010-05-10 | 2011-11-10 | Fujitsu Limited | Radar apparatus |
| CN104459650A (en) * | 2014-11-26 | 2015-03-25 | 北京无线电测量研究所 | Real-time calibration system and method of millimeter wave cloud-detection radar |
| KR20150076755A (en) * | 2013-12-27 | 2015-07-07 | 삼성탈레스 주식회사 | Method for arranging array plane of phase array antenna and method for operating the same |
| CN106772296A (en) * | 2017-01-20 | 2017-05-31 | 南京大学 | Meteorological radar echo intensity calibration device and method |
| CN107632293A (en) * | 2017-09-11 | 2018-01-26 | 芜湖航飞科技股份有限公司 | Weather radar intensity scale efficacious prescriptions method |
| CN109901125A (en) * | 2019-03-11 | 2019-06-18 | 中国电子科技集团公司第三十八研究所 | A kind of airborne two-dimentional Connectors for Active Phased Array Radar antenna calibration device and method |
| CN109946662A (en) * | 2019-05-06 | 2019-06-28 | 成都远望科技有限责任公司 | Calibration System in a kind of phased array weather radar machine |
-
2020
- 2020-02-13 CN CN202010090652.4A patent/CN111257883A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110273326A1 (en) * | 2010-05-10 | 2011-11-10 | Fujitsu Limited | Radar apparatus |
| KR20150076755A (en) * | 2013-12-27 | 2015-07-07 | 삼성탈레스 주식회사 | Method for arranging array plane of phase array antenna and method for operating the same |
| CN104459650A (en) * | 2014-11-26 | 2015-03-25 | 北京无线电测量研究所 | Real-time calibration system and method of millimeter wave cloud-detection radar |
| CN106772296A (en) * | 2017-01-20 | 2017-05-31 | 南京大学 | Meteorological radar echo intensity calibration device and method |
| CN107632293A (en) * | 2017-09-11 | 2018-01-26 | 芜湖航飞科技股份有限公司 | Weather radar intensity scale efficacious prescriptions method |
| CN109901125A (en) * | 2019-03-11 | 2019-06-18 | 中国电子科技集团公司第三十八研究所 | A kind of airborne two-dimentional Connectors for Active Phased Array Radar antenna calibration device and method |
| CN109946662A (en) * | 2019-05-06 | 2019-06-28 | 成都远望科技有限责任公司 | Calibration System in a kind of phased array weather radar machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014812A (en) * | 2020-09-01 | 2020-12-01 | 航天新气象科技有限公司 | Phase-controlled gust profile radar calibration system and method |
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