CN104459650B - Real-time calibration system and method of millimeter wave cloud-detection radar - Google Patents
Real-time calibration system and method of millimeter wave cloud-detection radar Download PDFInfo
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- CN104459650B CN104459650B CN201410698555.8A CN201410698555A CN104459650B CN 104459650 B CN104459650 B CN 104459650B CN 201410698555 A CN201410698555 A CN 201410698555A CN 104459650 B CN104459650 B CN 104459650B
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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
- 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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- 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 relates to a real-time calibration system and method of millimeter wave cloud-detection radar. The real-time calibration method includes the steps that a synchronous control signal is generated, a calibration testing signal of a receiver is generated, calibration is performed on gains of receiver channels, a target detection driving signal is generated in the same cycle and transmitted to space, meanwhile, a transmitting power monitoring signal is generated, and transmitting power of a transmitter is calibrated; target detection echo signals are received; the calibration testing signal of the receiver, the transmitting power monitoring signal and the target echo signals are each processed, and therefore corresponding power spectrum data are obtained; the power spectrum data are processed, so that calibration data are obtained. In the actual detection process of the millimeter wave cloud-detection radar, the real-time calibration signal is added, and the power of the transmitter and the gains of the receiver receiving channels are measured and calibrated on line, so that the status parameters of a radar system are obtained in real time; the target echo intensity is calibrated in real time, in this way, the accuracy of measuring the detection data in a quantified mode is guaranteed, and real and reliable observational data are provided for meteorological observation.
Description
Technical field
The present invention relates to Radar Technology field, the real-time Calibration System of more particularly, to a kind of millimeter wave cloud detection radar and method.
Background technology
Millimeter wave cloud detection radar is mainly used in the detection to the meteorology target such as cloud, mist, weak precipitation, using small particles to electromagnetism
The scattering process of ripple, in the certain area of continuous probe website overhead, the echo-signal of meteorological target, obtains high-spatial and temporal resolution
Meteorological target information, has the ability that target meteorological in solid space is carried out with accurate surveying, can continue to monitor the change of weather
Change.Can be applicable to atmospheric science research, weather modification, cloud automatic observation, environmental pollution monitoring, aerodrome guarantee,
The aspects such as military meteorological support and field.
With the development of millimeter wave cloud detection radar technology, the requirement more and more higher to observational data quantitative measurement precision, protect
The technical method of card certainty of measurement is exactly to carry out calibration to transmitter power, receiver gain radar parameter, thus obtaining accurately
Meteorological target component；Common Calibration Method is periodically to carry out calibration measurement using instrumentation to radar, in a period of time
Interior using same group of Calibration Data, this method ensure that certain certainty of measurement.Actually radar parameter be subject to environmental condition,
The impact of the factors such as run time, can often change.It is therefore desirable to can carry out to radar parameter in real time automatically in machine
Calibration, to improve the certainty of measurement of cloud detection radar observational data.
Content of the invention
The technical problem to be solved is for the deficiencies in the prior art, provides a kind of millimeter wave cloud detection radar real
When Calibration System and method, solve original millimeter wave cloud detection radar and can only periodically carry out the outer calibration of machine, do not possess real-time it is impossible to
Fully ensure that the problem of observational data certainty of measurement.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of real-time Calibration System of millimeter wave cloud detection radar,
Including system control module (1), signal processing module (2), receiver (3), transmitter (4) and real time data processing module (5)；
Described system control module (1), for controlling calibration and target acquisition process；
Described signal processing module (2), for producing synchronous control signal and exporting to receiver (3), is additionally operable to dock
Calibration test signal, transmission power monitoring signals and the target echo signal that receipts machine (3) sends carries out signal processing respectively, respectively
Obtain corresponding power spectrum data, and power spectrum data is sent to system control module (1)；
Described receiver (3), for producing a receiver calibration test signal in each synchronizing cycle, is sent to signal
Processing module (2), realizes receiver channel gain calibration, produces target acquisition drive signal, be sent within the same cycle
Transmitter (4)；It is additionally operable to for the target acquisition echo-signal of reception to issue signal processing module (2)；
Described transmitter (4), for, during by target acquisition drive signal to spatial emission, generating transmission power monitoring simultaneously
Signal, received machine (3) is sent to signal processing module (2) after processing, and realizes transmitter transmission power calibration；
Described real time data processing module (5), for obtaining power spectrum data from system control module (1), to power spectrum
Data carries out process and obtains relevant parameter, calculates Calibration Data using relevant parameter.
The invention has the beneficial effects as follows：The present invention is by increasing to millimeter wave cloud detection radar during actual detection in real time
Calibration signal, the gain to transmitter power, receiver receiving channel carries out on-line measurement and calibration, obtains radar system in real time
State parameter, real-time calibration is carried out to target-echo intensity it is ensured that the accuracy of detection data quantitative measurement, thus being gas
As observation provides genuine and believable observational data.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described receiver (3) includes three receiving channels, respectively horizontal polarization receiving channel, vertical polarization
Receiving channel and auxiliary reception passage；Described signal processing module (2) includes two treatment channel, the respectively first treatment channel
With second processing passage, the first treatment channel of the horizontal polarization receiving channel of receiver (3) and signal processing module (2) is even
Connect, the vertical polarization receiving channel of receiver (3) and auxiliary reception passage pass through the of switching switch and signal processing module (2)
Two treatment channel connect, and when carrying out transmitter transmission power calibration measurement, second processing passage is led to the auxiliary of receiver (3)
Road connects, when carrying out the gain calibration measurement of receiver (3) receiving channel and echo-signal and measuring, second processing passage with vertical
Polarization reception passage connects.
Further, described receiver (3) passes through horizontal polarization receiving channel and vertical polarization receiving channel to receiver mark
School test signal carries out down-converted, and then is sent to signal processing module (2), the horizontal polarization of the receipts that achieve a butt joint machine (3)
The calibration measurement of receiving channel and vertical polarization receiving channel gain.
Further, the target acquisition drive signal that described transmitter (4) sends to receiver (3) is amplified processing, and enters
And be radiated in space, the bonder of transmitter (4) forms transmission power monitoring signals simultaneously, is sent to receiver (3), and warp
The auxiliary reception passage of receiver (3) carries out down-converted and is sent to signal processing module (2), realizes transmitter (4) is sent out
Penetrate the calibration measurement of power.
Further, described receiver (3) receives target echo signal, is sent respectively to horizontal polarization receiving channel and vertical
Polarization reception passage, two polarization reception passages carry out down-converted to echo-signal, and then are sent to signal processing module
(2), realize echo-signal measurement.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of real-time Calibration Method of millimeter wave cloud detection radar,
Comprise the steps：
Step 1, system control module controls the running starting real-time calibration and target acquisition；
Step 2, signal processing module produces synchronous control signal, and receiver produces a receiver in each synchronizing cycle
Calibration test signal, realizes receiver channel gain calibration, and produces target acquisition drive signal within the same cycle；
Step 3, transmitter by target acquisition drive signal to spatial emission when, simultaneously generate transmission power monitoring signals,
Received machine is sent to signal processing module after processing, and realizes transmitter transmission power calibration；
Step 4, target acquisition drive signal battery has fired, receiver receives target acquisition echo-signal and is sent to signal
Processing module；
Step 5, signal processing module is to receiver calibration test signal, transmission power monitoring signals and target echo signal
Processed, respectively obtained corresponding power spectrum data；
Step 6, real time data processing module carries out process to power spectrum data and obtains relevant parameter, using relevant parameter meter
Calculate Calibration Data.
On the basis of technique scheme, the present invention can also do following improvement.
Further, realize concretely comprising the following steps of receiver channel gain calibration in step 2：
Step 2.1, the comprehensive assembly of frequency of receiver first produces a receiver calibration test signal within each synchronizing cycle,
It is sent respectively to horizontal polarization receiving channel and the vertical polarization receiving channel of receiver；
Under step 2.2, horizontal polarization receiving channel and vertical polarization receiving channel are carried out to receiver calibration test signal
Frequency-conversion processing and then be sent to signal processing module；
Step 2.3, signal processing module carries out intermediate frequency to the receiver calibration test signal receiving in predetermined period number
Sampling processing, obtains corresponding power spectrum data.
Further, being implemented as of step 3：
Step 3.1, the bonder of transmitter generates transmission power monitoring signals, is sent to receiver；
Step 3.2, receiver carries out down-converted through auxiliary reception passage to transmission power detection signal, and then sends
To signal processing module；
Step 3.3, signal processing module carries out intermediate frequency to the receiver calibration test signal receiving in predetermined period number
Sampling processing, obtains corresponding power spectrum data.
Further, being implemented as of step 4：
Step 4.1, receiver receives target echo signal, is sent respectively to the horizontal polarization receiving channel of receiver and hangs down
Straight polarization reception passage；
Step 4.2, horizontal polarization receiving channel and vertical polarization receiving channel are carried out at down coversion to target echo signal
Manage and then be sent to signal processing module；
Step 4.3, signal processing module carries out intermediate frequency to the receiver calibration test signal receiving in predetermined period number
Sampling processing, obtains corresponding power spectrum data.
Further, being implemented as of step 6：
Step 6.1, system control module is by the power spectrum data of receiver calibration test signal, transmission power monitoring signals
Power spectrum data and the power spectrum data of echo-signal be stored in different internal memories；
Step 6.2, real time data processing module carries out quality control, signal identification sum respectively to above-mentioned power spectrum data
According to process, obtain signal power, channel noise, radial velocity, speed spectrum width, signal to noise ratio and signal quality index；
Step 6.3, is calculated required calibration result data using signal power and channel noise.
Brief description
Fig. 1 is a kind of real-time Calibration System structural representation of present invention millimeter wave cloud detection radar；
Fig. 2 is a kind of real-time Calibration Method flow chart of present invention millimeter wave cloud detection radar.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, system control module, 2, signal processing module, 3, receiver, 4, transmitter, 5, real time data processing module.
Specific embodiment
Below in conjunction with accompanying drawing, the principle of the present invention and feature are described, example is served only for explaining the present invention, and
Non- for limiting the scope of the present invention.
As shown in figure 1, a kind of real-time Calibration System of millimeter wave cloud detection radar, including system control module (1), signal processing
Module (2), receiver (3), transmitter (4) and real time data processing module (5).
In the present embodiment, during operation, described system control module (1) and real time data processing module loading are to Industry Control
In the shared drive of computer, described signal processing module is the signal processor being inserted on industrial control computer slot；Institute
State industrial control computer pass through pci bus respectively with described system control module (1), real time data processing module (5) and letter
Number processing module (2) connects, and described signal processing module (2) has two treatment channel, receiver (3) have three receive logical
Road, receiver (3) passes through cable and switching switch is connected with signal processing module (2), then by cable with transmitter (4) even
Connect.
Described system control module (1), for controlling calibration and target acquisition process；Described signal processing module (2),
Control real-time calibration and the output of detectable signal, for producing synchronous control signal and exporting to receiver (3), be additionally operable to dock
Calibration test signal, transmission power monitoring signals and the target echo signal that receipts machine (3) sends carries out signal processing respectively, respectively
Obtain corresponding power spectrum data, and power spectrum data is sent to system control module (1)；Described receiver (3), for
Produce a receiver calibration test signal each synchronizing cycle, be sent to signal processing module (2), realize receiver channel and increase
Beneficial calibration, produces target acquisition drive signal within the same cycle, is sent to transmitter (4)；It is additionally operable to the target that will receive
Detect echo-signal and be sent to signal processing module (2)；Described transmitter (4), for by target acquisition drive signal to space
During transmitting, generate transmission power monitoring signals, received machine (3) is sent to signal processing module (2) after processing simultaneously, realize sending out
Penetrate machine transmission power calibration；Described real time data processing module (5), for obtaining power spectrum data from system control module (1),
Process is carried out to power spectrum data and obtains relevant parameter, calculate Calibration Data using relevant parameter.
Described receiver (3) includes three receiving channels, respectively horizontal polarization receiving channel, vertical polarization receiving channel
With auxiliary reception passage；Described signal processing module (2) includes two treatment channel, at the respectively first treatment channel and second
Reason passage, the horizontal polarization receiving channel of receiver (3) is connected with the first treatment channel of signal processing module (2), receiver
(3) vertical polarization receiving channel and auxiliary reception passage are passed through switching switch and are led to the second processing of signal processing module (2)
Road connects, and when carrying out transmitter transmission power calibration measurement, second processing passage is connected with the accessory channel of receiver (3),
When carrying out the gain calibration measurement of receiver (3) receiving channel with echo-signal measurement, second processing passage and vertical polarization connect
Receive passage to connect.
Described receiver (3) is passed through horizontal polarization receiving channel and vertical polarization receiving channel and is tested letter to receiver calibration
Number carry out down-converted, and then be sent to signal processing module (2), the horizontal polarization receiving channel of the receipts that achieve a butt joint machine (3)
Calibration measurement with vertical polarization receiving channel gain.
The target acquisition drive signal that described transmitter (4) sends to receiver (3) is amplified processing, and then is radiated
In space, the bonder of transmitter (4) forms transmission power monitoring signals simultaneously, is sent to receiver (3), and received machine
(3) auxiliary reception passage carries out down-converted and is sent to signal processing module (2), realizes to transmitter (4) transmission power
Calibration measurement.
Described receiver (3) receives target echo signal, is sent respectively to horizontal polarization receiving channel and vertical polarization connects
Receive passage, two polarization reception passages carry out down-converted to echo-signal, and then are sent to signal processing module (2), real
Existing echo-signal measurement.
The receiver calibration test signal of millimeter wave cloud detection radar and target acquisition drive signal are by comprehensive group of the frequency of receiver
Part produces.
Calibration signal and target detection signal explanation：Receiver exports a receiver mark in each synchronizing cycle first
School test signal, and send it to two polarization reception passages of receiver, i.e. horizontal polarization receiving channel and vertical polarization
Receiving channel, carries out down-converted, then inputs to signal processing module, and the gain to two receiving channels carries out calibration survey
Amount.
Receiver sends a target acquisition drive signal to transmitter, and transmitter is by after the amplification of target acquisition drive signal
Launch, the bonder in transmitter generates transmission power monitoring signals simultaneously, is sent to receiver, and then by connecing
The auxiliary reception passage of receipts machine is sent to signal processor, realizes the calibration measurement to transmitter power.
Receiver receives the echo-signal of meteorological target, inputs to two polarization reception passages of receiver, i.e. water respectively
Mean pole receiving channel and vertical polarization receiving channel, carry out down-converted, then input to signal processing module, to two
The echo-signal of passage measures.
As shown in Fig. 2 a kind of real-time Calibration Method of millimeter wave cloud detection radar, comprise the steps：
Step 1, system control module controls the running starting real-time calibration and target acquisition.
Specifically, system control module sends, to signal processing module, the running parameter having set, parameter includes each
Synchronizing cycle length, number N of synchronizing cycle, apart from number of plies M, each power spectral density number F on layer, start in real time
Calibration and the running of target acquisition.
Step 2, signal processing module produces synchronous control signal, and receiver produces a receiver in each synchronizing cycle
Calibration test signal, realizes receiver channel gain calibration, and produces target acquisition drive signal within the same cycle.
Specifically, signal processing module exports synchronous control signal to receiver, receiver is made to enter running status；Receive
The comprehensive assembly of frequency of machine exports a receiver calibration test signal in each synchronizing cycle first, and letter is tested in receiver calibration
Number be divided into two-way, input to two receiving channels of receiver respectively, that is, horizontal polarization receiving channel and vertical polarization receive logical
Road, the gain to two receiving channels carries out calibration measurement；Horizontal polarization receiving channel and vertical polarization receiving channel are to reception
Machine calibration test signal carries out down-converted and then is sent to signal processing module；Signal processing module is to predetermined period number
The receiver calibration test signal of interior reception carries out if sampling process, obtains corresponding power spectrum data.
Step 3, transmitter by target acquisition drive signal to spatial emission when, simultaneously generate transmission power monitoring signals,
Received machine is sent to signal processing module after processing, and realizes transmitter transmission power calibration.
Specifically, receiver exports a target acquisition drive signal to transmitter, target acquisition is driven letter by transmitter
Launch after number amplifying, bonder simultaneously through transmitter within generation transmission power monitoring signals are sent to receiver,
The auxiliary reception passage of received machine carries out down-converted, is then sent to signal processing module, carries out digital sample process,
Calibration measurement is carried out to transmitter power；
Step 4, target acquisition drive signal battery has fired, receiver receives target acquisition echo-signal and is sent to signal
Processing module.
Specifically, after target acquisition drive signal end of output, receiver receives the echo-signal of meteorological target, respectively
Input to two polarization reception passages of receiver, i.e. horizontal polarization receiving channel and vertical polarization receiving channel, receiver enters
Row down-converted, then inputs to signal processing module, and the echo-signal of two passages is measured；Signal processing module
Digital sample process is carried out to the receiver calibration test signal receiving in predetermined period number, obtains corresponding power spectrum number
According to.
Step 5, signal processing module is to receiver calibration test signal, transmission power monitoring signals and target echo signal
Processed, respectively obtained corresponding power spectrum data；
Each synchronizing cycle inner receiver can be sequentially received the calibration test signal of two receiving channels, transmitting work(
Rate monitoring signals and target echo signal totally three kinds of measurement signals, signal processing module carries out intermediate-freuqncy signal digital sample process,
After the signal sampling of N number of synchronizing cycle is processed, signal processing module carries out once complete signal processing, obtains three kinds of letters
Number power spectrum data, these power spectrum datas are sent to system control module by pci bus.
Step 6, real time data processing module carries out process to power spectrum data and obtains relevant parameter, using relevant parameter meter
Calculate Calibration Data.
The power spectrum data of real time data processing module reception system control module transmission, power spectrum data has fixing
Data structure, including M, apart from layer, each includes F power spectrum degrees of data on layer, and M is divided into 3 apart from layer
Section, is corresponding in turn to the power spectrum data of above-mentioned three kinds of signals.Extract reception according to the above-mentioned data structure being pre-designed respectively
The power spectrum data of the calibration test signal of two passages of machine, the power spectrum data of transmitter power monitoring signals and target acquisition
The power spectrum data of echo-signal, is saved in the internal memory of different address；Then respectively quality control is carried out to power spectrum data,
Signal identification data is processed, and generates signal power, channel noise, radial velocity, speed spectrum width, signal to noise ratio and signal quality and refers to
Number, then, can obtain the calibration result data of needs using the signal power generating and channel noise.
The concrete calculating process calculating receiver channel gain is as follows：
First, the signal power of two receiving channel calibration test signals is processed, obtain two receiving channels
Yield value, processes formula as follows：
Gr=Pcmax-GS-PT+NL(1)
Wherein, GSFor the gain of signal processing, PTFor the output of test signal, NLFor signal attenuation arranges value, this is several
Individual parameter is all the fixed value prestoring, and unit is all dB, is stored in real time data processing module and directly uses.GrFor receiving
Channel gain value, PcmaxFor processing the signal power of the calibration test signal obtaining, pressed with the test signal power of two passages
Formula 1 is calculated the gain of two receiving channels, and unit is all dB.
Then, the signal power of transmitter power monitoring signals is processed, obtain transmitter power value, process formula
As follows：
Pt=Ptmax+Nnoise+Pc(2)
Wherein, PtFor transmitter power exact value, PtmaxFor processing the signal power of the transmitter monitoring signals obtaining,
NnoiseFor channel noise value, PcFor correction factor, unit is all dB.
Finally, needs process and give vent to anger as the exact value of target.Weather echo intensity is typically represented with reflectivity factor Z, single
Position is mm6/m3, it processes model and is approximately：
Z=C0PrR2(3)
Wherein, C0For radar constant, PrFor the exact value of target echo signal, unit is dB, and R is echo distance, and unit is
m；From formula 3, the accuracy of measurement of reflectivity factor Z depends on echo signal power and radar constant C0.By public as follows
Formula can obtain the exact value of meteorological target-echo intensity.
Pr=Prmax-Gr(4)
Wherein, PrmaxFor processing the signal power of the target echo signal obtaining, GrFor receiving channel yield value.By formula 4
Process out the echo signal power exact value of two receiving channels respectively.
Radar constant C0Process formula as follows：
In formula (5), PtFor transmitter power exact value, G is antenna gain, and unit is dB, and θ is antenna horizontal beam width
Degree,For antennas orthogonal beam angle, unit is degree, and τ is fire pulse width, and unit is μ s, and c is electromagnetic transmission speed (3
×108M/s), λ is radar operation wavelength, and unit is m, and n is complex refractive index.Be susceptible to change in these parameters is to send out
Penetrate acc power Pt, other parameters are all constant.The exact value of transmitter power can be obtained by formula 2, substitute into formula 5 and obtain thunder
Reach constant C0.
After completing above-mentioned data processing, by the Calibration Data obtaining C0, two receiving channels echo signal power accurate
Value PrSubstitute into formula 3 with each apart from the distance values of layer, obtain the reflectivity factor of two passages.
So far it is achieved that the real-time calibration of millimeter wave cloud detection radar and detection.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of real-time Calibration System of millimeter wave cloud detection radar is it is characterised in that include system control module (1), signal processing
Module (2), receiver (3), transmitter (4) and real time data processing module (5)；
Described system control module (1), for controlling calibration and target acquisition process；
Described signal processing module (2), for producing synchronous control signal and exporting to receiver (3), is additionally operable to receiver
(3) the calibration test signal, transmission power monitoring signals and the target echo signal that send carry out signal processing respectively, respectively obtain
Corresponding power spectrum data, and power spectrum data is sent to system control module (1)；
Described receiver (3), for producing a receiver calibration test signal in each synchronizing cycle, is sent to signal processing
Module (2), realizes receiver channel gain calibration, produces target acquisition drive signal, be sent to transmitting within the same cycle
Machine (4)；It is additionally operable to for the target acquisition echo-signal of reception to be sent to signal processing module (2)；
Described transmitter (4), for during by target acquisition drive signal to spatial emission, generating transmission power monitoring letter simultaneously
Number, received machine (3) is sent to signal processing module (2) after processing, and realizes transmitter transmission power calibration；
Described real time data processing module (5), for obtaining power spectrum data from system control module (1), to power spectrum data
Carry out process and obtain relevant parameter, calculate Calibration Data using relevant parameter；
Described receiver (3) includes three receiving channels, respectively horizontal polarization receiving channel, vertical polarization receiving channel and auxiliary
Help receiving channel；Described signal processing module (2) includes two treatment channel, and the respectively first treatment channel and second processing are led to
Road, the horizontal polarization receiving channel of receiver (3) is connected with the first treatment channel of signal processing module (2), receiver (3)
Vertical polarization receiving channel and auxiliary reception passage are passed through switching switch and are connected with the second processing passage of signal processing module (2)
Connect, when carrying out transmitter transmission power calibration measurement, second processing passage is connected with the accessory channel of receiver (3), is entering
When the gain calibration measurement of row receiver (3) receiving channel is measured with echo-signal, second processing passage and vertical polarization receive logical
Road connects.
2. according to claim 1 a kind of real-time Calibration System of millimeter wave cloud detection radar it is characterised in that described receiver
(3) down-converted is carried out to receiver calibration test signal by horizontal polarization receiving channel and vertical polarization receiving channel,
And then it is sent to signal processing module (2), the horizontal polarization receiving channel of the receipts that achieve a butt joint machine (3) and vertical polarization receiving channel
The calibration measurement of gain.
3. according to claim 1 a kind of real-time Calibration System of millimeter wave cloud detection radar it is characterised in that described transmitter
(4) the target acquisition drive signal that receiver (3) is sent is amplified processing, and then is radiated in space, transmitter simultaneously
(4) bonder forms transmission power monitoring signals, is sent to receiver (3), and the auxiliary reception passage of received machine (3) enters
Row down-converted is sent to signal processing module (2), realizes the calibration measurement to transmitter (4) transmission power.
4. according to claim 1 a kind of real-time Calibration System of millimeter wave cloud detection radar it is characterised in that described receiver
(3) receive target echo signal, be sent respectively to horizontal polarization receiving channel and vertical polarization receiving channel, two polarization reception
Passage carries out down-converted to echo-signal, and then is sent to signal processing module (2), realizes echo-signal measurement.
It is 5. a kind of that to realize millimeter wave cloud detection radar using the real-time Calibration System of millimeter wave cloud detection radar described in claim 1 real-time
Calibration Method is it is characterised in that comprise the steps：
Step 1, system control module controls the running starting real-time calibration and target acquisition；
Step 2, signal processing module produces synchronous control signal, and receiver produces a receiver calibration in each synchronizing cycle
Test signal, realizes receiver channel gain calibration, and produces target acquisition drive signal within the same cycle；
Step 3, transmitter by target acquisition drive signal to spatial emission when, simultaneously generate transmission power monitoring signals, through connecing
Receipts machine is sent to signal processing module after processing, and realizes transmitter transmission power calibration；
Step 4, target acquisition drive signal battery has fired, receiver receives target acquisition echo-signal and is sent to signal processing
Module；
Step 5, signal processing module is carried out to receiver calibration test signal, transmission power monitoring signals and target echo signal
Process, respectively obtain corresponding power spectrum data, store system control module；
Step 6, real time data processing module carries out process to power spectrum data and obtains relevant parameter, calculates mark using relevant parameter
School data.
6. according to claim 5 a kind of real-time Calibration Method of millimeter wave cloud detection radar it is characterised in that realizing in step 2
The concretely comprising the following steps of receiver channel gain calibration：
Step 2.1, the comprehensive assembly of frequency of receiver first produces a receiver calibration test signal within each synchronizing cycle, respectively
It is sent to horizontal polarization receiving channel and the vertical polarization receiving channel of receiver；
Step 2.2, horizontal polarization receiving channel and vertical polarization receiving channel carry out down coversion to receiver calibration test signal
Process and then be sent to signal processing module；
Step 2.3, signal processing module carries out if sampling to the receiver calibration test signal receiving in predetermined period number
Process, obtain corresponding power spectrum data.
7. according to claim 5 a kind of real-time Calibration Method of millimeter wave cloud detection radar it is characterised in that step 3 concrete
It is embodied as：
Step 3.1, the bonder of transmitter generates transmission power monitoring signals, is sent to receiver；
Step 3.2, receiver carries out down-converted through auxiliary reception passage to transmission power monitoring signals, and then is sent to letter
Number processing module；
Step 3.3, signal processing module is carried out at if sampling to the transmission power monitoring signals receiving in predetermined period number
Reason, obtains corresponding power spectrum data.
8. according to claim 5 a kind of real-time Calibration Method of millimeter wave cloud detection radar it is characterised in that step 4 concrete
It is embodied as：
Step 4.1, receiver receives target echo signal, is sent respectively to the horizontal polarization receiving channel of receiver and vertical pole
Change receiving channel；
Step 4.2, horizontal polarization receiving channel and vertical polarization receiving channel carry out down-converted to target echo signal and enter
And it is sent to signal processing module；
Step 4.3, signal processing module carries out if sampling process to the target echo signal receiving in predetermined period number, obtains
To corresponding power spectrum data.
9. according to claim 5 a kind of real-time Calibration Method of millimeter wave cloud detection radar it is characterised in that step 6 concrete
It is embodied as：
Step 6.1, system control module is by the work(of the power spectrum data of receiver calibration test signal, transmission power monitoring signals
The power spectrum data of rate modal data and echo-signal is stored in different internal memories；
Step 6.2, real time data processing module carries out quality control to above-mentioned power spectrum data respectively, at signal identification data
Reason, obtains signal power, channel noise, radial velocity, speed spectrum width, signal to noise ratio and signal quality index；
Step 6.3, is calculated required calibration result data using signal power and channel noise.
Priority Applications (1)
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| CN108196233B (en) * | 2017-12-26 | 2020-08-25 | 北京无线电测量研究所 | Real-time online calibration method based on millimeter wave cloud detection radar |
| CN108957415A (en) * | 2018-08-24 | 2018-12-07 | 北京无线电测量研究所 | The real-time Calibration Method and system of Analysis of Differential Reflectivity Factor Measured |
| CN109782241B (en) * | 2019-03-29 | 2021-01-29 | 北京润科通用技术有限公司 | Meteorological radar echo simulation method and system |
| CN110907902B (en) * | 2019-09-23 | 2023-12-05 | 成都锦江电子系统工程有限公司 | Weather radar calibration method |
| CN111257883A (en) * | 2020-02-13 | 2020-06-09 | 航天新气象科技有限公司 | Calibration device and method for phased array weather radar system |
| CN115356696B (en) * | 2022-07-30 | 2023-07-04 | 中国气象局气象探测中心 | Weather radar signal processing system algorithm calibration method and device |
| CN115657569B (en) * | 2022-12-14 | 2023-04-07 | 北京七星华创微波电子技术有限公司 | Millimeter wave broadband portable calibration source control system and method |
| CN117075128B (en) * | 2023-09-11 | 2024-04-09 | 深圳市速腾聚创科技有限公司 | Ranging method, ranging apparatus, electronic device, and computer-readable storage medium |
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Effective date of registration: 20191213 Address after: 214000 28 Weiming Road, Binhu District, Wuxi City, Jiangsu Province Patentee after: Aerospace new weather Technology Co., Ltd Address before: 100854, 32, Yongding Road, 50, Beijing, Haidian District Patentee before: Beijing Institute of Radio Measurement |