CN109581307A - Echo strength Z parameter scaling method, device, computer equipment and storage medium - Google Patents
Echo strength Z parameter scaling method, device, computer equipment and storage medium Download PDFInfo
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- CN109581307A CN109581307A CN201811398625.2A CN201811398625A CN109581307A CN 109581307 A CN109581307 A CN 109581307A CN 201811398625 A CN201811398625 A CN 201811398625A CN 109581307 A CN109581307 A CN 109581307A
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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
- 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
- G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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- Radar, Positioning & Navigation (AREA)
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- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention relates to echo strength Z parameter scaling method, device, computer equipment and storage mediums, this method includes selection standard metal ball, it is set up by ground so that standard metal ball is along radar radial direction high-speed motion, to form doppler echo, the echo amplitude of examination criteria metal ball；Obtain the radial motion speed of standard metal ball；Range bin where calculating standard metal ball according to the parameter of the radar of acquisition and the parameter of standard metal ball corresponds to Z parameter；The processing of simulated target transmission power is carried out according to range bin where standard metal ball；Full distance range is demarcated using simulated target；The echo strength Z parameter correction value of each range bin is calculated each range bin of calibration；Corrected parameter table is established according to the echo strength Z parameter correction value of each range bin；Radar surveying value is corrected using corrected parameter table when use, to obtain echo strength Z parameter calibration value.The present invention realizes the precision and accuracy for improving calibration.
Description
Technical field
The present invention relates to Radar Technology fields, more specifically refer to echo strength Z parameter scaling method, device, calculating
Machine equipment and storage medium.
Background technique
Severe Convective Weather Forecasting early warning is disaster prevention and relief vital task, strong convective weather generation is unexpected, movement is rapid,
Variation is violent, destructive power is extremely strong, is frequently accompanied by the bad weathers such as lightning flashes and thunder rumbles, wind heavy rain is anxious, causes house to ruin, crops trees
It wrecks, telecommunications traffic is impaired, even causes casualties.Advanced Numerical Prediction Models gradually use and Doppler weather thunder
Up to net gradual perfection, optimal forecast means and forecasting procedure are provided for the short forecasting of strong convective weather.
Echo strength Z parameter is one of core parameter of weather radar, and measurement error includes systematic error and the mistake that rises and falls
Difference, systematic error are the mean values of error sample, and scintillation error is that error sample subtracts the root-mean-square value after mean value, and error sample
It is that measured value subtracts true value, due to lacking true value measurement equipment, most of radars use the equivalent acquisition true value of analog form, obtain
Error sample calculates root-mean-square error, and as precision.If there is no Accurate Calibration systematic error, accuracy or accuracy
Do not ensure, but if true value measurement systematic error can be utilized, and to systematic features, precision is equal to accuracy, because
This demarcates radar measurement system error, forms systematic features table, examine in radar by providing objective target true value
Target component is corrected in survey, is the main contents of Z parameter calibration.
Z parameter scaling method about four seed types proposed both at home and abroad at present, first is that satellite is demarcated, second is that nobody
Machine calibration, third is that balloon drifted by wind is demarcated, fourth is that receiver injection simulated target calibration.Satellite is demarcated due to apart from too far, atmosphere
Ingredient and cloud and mist equal distribution state are uncertain, and atmospheric propagation costing bio disturbance error can reach 1dB or more, extremely according to true value stated accuracy
It is three times of measurement parameter precision less, measurement accuracy is usually 1dB, and stated accuracy is unsatisfactory for radar and wants to accuracy of target measurement
It asks, while the relative motion between calibration state radar beam and satellite calibration antenna beam also will cause beam shape weighting
Caused beam shape loss, may reach 3dB, and scaling method is subjective signal amplitude method rather than objective target acquisition side
Method is demarcated by injecting standard signal amplitude to each radar emission, without the objective benchmark of real goal, the precision of calibration
It is not high with accuracy；Unmanned plane calibration is similar with Satellite Calibration Method, is subjective signal amplitude standardization, but unmanned plane is also deposited
In platform stabilization error, while when there is also radars to unmanned plane scan tracing, antenna beam waveform loses error；Gas drifted by wind
Ball uses corner reflector or standard metal sphere, compared to the above to belong to objective goal approach, i.e., measured with standard target and
Calibration, standard target is an objective reflector, and to all radars characteristic having the same, but balloon drifted by wind presence racks
It is dynamic, when position is unstable and radar is to balloon sounding it is difficult to ensure that in antenna beam maximum value orientation detection, antenna beam wave
Shape loss is big, and maximum possible is more than 3dB, is also unsatisfactory for radar to accuracy of target measurement requirement；Receiver injects simulated target mark
It surely is at present using most scaling methods, all weather radars must be designed according to the rules from receiver injection simulated target
Echo intensity calibration method in machine, this method can only calibrate the ionization meter consistency in this radar different distance library,
The simulated target injecting power for providing a calculating equivalent strength carries out machine internal calibration, but cannot be guaranteed quasi- to objective target measurement
True property, all that the radars calibrated are injected using simulated target receiver when in use according to current statistical conditions, adjacent radar station
It is maximum to the same area detected intensity difference to reach 10dB or more.
Therefore, it is necessary to design a kind of new method, the precision and accuracy for improving calibration are realized.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, echo strength Z parameter scaling method, device, meter are provided
Calculate machine equipment and storage medium.
In a first aspect, the embodiment of the invention provides a kind of echo strength Z parameter scaling methods comprising:
Selection standard metal ball is more to be formed by ground erection so that standard metal ball is along radar radial direction high-speed motion
General Le echo；
Using the echo amplitude of doppler echo examination criteria metal ball；
Obtain the radial motion speed of standard metal ball；
Obtain the parameter of radar and the parameter of standard metal ball；
Range bin where calculating standard metal ball according to the parameter of radar and the parameter of standard metal ball corresponds to Z parameter,
To obtain range bin echo strength Z parameter calibration value where standard metal ball；
The processing of simulated target transmission power is carried out according to range bin where standard metal ball, to obtain setting up point equivalence margin
The simulated target signal transmission power of metal ball；
Full distance range is demarcated using simulated target；
The echo strength Z parameter correction value of each range bin is calculated each range bin of calibration；
Corrected parameter table is established according to the echo strength Z parameter correction value of each range bin；
Radar surveying value is corrected using corrected parameter table when use, to obtain echo strength Z parameter calibration value.
Second aspect, the embodiment of the invention also provides a kind of echo strength Z parameter caliberating devices comprising for executing
The unit of the above method.
The third aspect, the embodiment of the invention also provides a kind of computer equipments comprising memory and processor, it is described
Computer program is stored on memory, the processor realizes the above method when executing the computer program.
Fourth aspect, the embodiment of the invention also provides a kind of computer readable storage medium, the storage medium storage
There is computer program, the computer program includes program instruction, and described program instruction can be realized when being executed by a processor
State method.
Compared with the prior art, the invention has the advantages that: the present invention is set up by ground along radar radial direction high-speed motion
Standard metal ball, simulated target output amplitude is corresponded to by standard metal ball, then along radar radial distance direction by range bin
Standard metal ball simulated target amplitude is calculated, realizes the calibration of radar echo intensity Z parameter, is joined according to the Z that each range bin obtains
Number measurement system error combines to form corrected parameter table, can be surveyed in practice to each radar using the corrected parameter table
Magnitude is modified, and realizes the precision and accuracy for improving calibration.
The invention will be further described in the following with reference to the drawings and specific embodiments.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the application scenarios schematic diagram of echo strength Z parameter scaling method provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of echo strength Z parameter scaling method provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of marking apparatus provided in an embodiment of the present invention；
Fig. 4 is the configuration schematic diagram of marking apparatus provided in an embodiment of the present invention；
Fig. 5 is doppler filtering schematic diagram provided in an embodiment of the present invention；
Fig. 6 is the graph of relation of standard metal ball RCS and radius provided in an embodiment of the present invention；
Fig. 7 is the schematic block diagram of echo strength Z parameter caliberating device provided in an embodiment of the present invention；
Fig. 8 is the schematic block diagram of computer equipment provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that mesh of the term used in this description of the invention merely for the sake of description specific embodiment
And be not intended to limit the present invention.As description of the invention and it is used in the attached claims, unless on
Other situations are hereafter clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.
It will be further appreciated that the term "and/or" used in description of the invention and the appended claims is
Refer to any combination and all possible combinations of one or more of associated item listed, and including these combinations.
Fig. 1 and Fig. 2 are please referred to, Fig. 1 is the application scenarios of echo strength Z parameter scaling method provided in an embodiment of the present invention
Schematic diagram.Fig. 2 is the schematic flow chart of echo strength Z parameter scaling method provided in an embodiment of the present invention.Echo strength Z
Parameter calibration method is applied in server.The server can be a server in Distributed Services platform, the service
Be deployed with calibrating platform in device, radar surveying value be sent in server so that server can to radar surveying value into
Row amendment.
It should be noted that a server is only illustrated in Fig. 2, it in the actual operation process, can more services
Device carries out the amendment of multiple radar surveying values simultaneously.
Fig. 2 is the flow diagram of echo strength Z parameter scaling method provided in an embodiment of the present invention.As shown in Fig. 2, should
Method includes the following steps S110 to S200.
S110, selection standard metal ball 50 are set up by ground so that standard metal ball 50 is along radar radial direction high-speed motion,
To form doppler echo.
50 diameter of standard metal ball refers to 50 minimum diameter of standard metal ball for calibration, less than the standard of this diameter
Metal ball 50 cannot be used for demarcating, since reflection of electromagnetic wave characteristic is divided into Rayleigh region, resonance region and optics area, only optics area
It can be with Accurate Calibration.Standard metal ball 50 is chosen according to the radar operation wavelength to be demarcated, according to radar to target acquisition RCS
Subregion condition calculates 50 diameter of standard metal ball with optics area initial conditions and 3 times of redundancies.
Standard metal ball 50 is chosen according to the radar operation wavelength to be demarcated, according to radar to target acquisition RCS subregion
Condition calculates metal bulb diameter.Due to perfect radial symmetry, perfact conductor ball is simplest in all three-dimensional structures dissipates
Beam, geometric shape is simple and echo is not with change in orientation, but RCS, with electric size significant change, it is Rayleigh region that RCS, which divides, humorous
Shake area and optics area, and as shown in Figure 5 and Figure 6, parameter ka is the sphere perimeter indicated with wavelength, thenA is sphere half
Diameter, λ are operation wavelength；As 0≤ka≤1, RCS increases with ka and is increased sharply in Rayleigh region；As 1≤ka≤10, RCS
In resonance region, size acute variation increases resonance amplitude with ka and gradually restrains；As ka >=10, increases RCS with ka and stablize, examine
Consider three times design redundancy, taking ka is 30, then the metal radius of a ball isTo S-band radar, a >=48cm, C-band thunder
It reaches, a >=26cm, X-band radar, a >=15cm.
Specifically, Fig. 3 and Fig. 4 are please referred to, doppler echo is formed by marking apparatus, the marking apparatus includes that ground is set up
And standard metal ball 50, it includes leveling lugs 30, leveling structure, installation chassis 20 and slide construction, the tune that ground, which is set up,
Flat structure is connect with the leveling lugs 30, which is connected to the top of leveling lugs 30, standard metal ball 50 and installation bottom
Mobile by slide construction between disk 20, the installation site of the slide construction transports standard metal ball 50 along the radial high speed of radar
It is dynamic；Above-mentioned marking apparatus further includes the first calibration antenna 60 and the second calibration antenna 70, the first calibration antenna 60 and second
Calibration antenna 70 is connect by rotational structure with installation chassis 20 respectively, and the first calibration antenna 60 and the second calibration antenna 70 divide
Not Wei Yu standard metal ball 50 two sides, when standard metal ball 50 does along sliding rail 51 reciprocating motion of high speed, the first calibration antenna
60 and second calibration antenna 70 do not work；Standard metal ball 50 is static, the first calibration antenna 60 and the second calibration antenna 70
Rotation is perpendicular to installation chassis 20.
Above-mentioned slide construction includes the sliding rail 51 being located on installation chassis 20, the cunning connecting with the standard metal ball 50
Block 52 and the power source connecting with sliding block 52, above-mentioned sliding block 52 are connect with sliding rail 51, which includes but is not limited to
Servo motor 74.
Above-mentioned rotational structure includes motor 74, drive mechanism, two supports, antenna mounting plate 71, encoder 75, described
Motor 74 is connect with installation chassis 20, and two supports are connect with installation chassis 20, and motor 74 is connect with drive mechanism, drive mechanism
It is connect with antenna mounting plate 71, and antenna mounting plate 71 is connect with encoder 75 by shaft, which passes through one of branch
Seat, drive mechanism include master gear 73 and from gear 72, and above-mentioned master gear 73 connect with electrode, from gear 72 and antenna installation
Plate 71 is connected by shaft, and the first above-mentioned calibration antenna 60 and the second calibration antenna 70 are located on antenna mounting plate 71,
Master gear 73 is driven to rotate by motor 74, master gear 73 drives from gear 72 and rotates, and should drive day by shaft from gear 72
The rotation of line mounting plate 71, and the rotational angle of antenna mounting plate 71 can be detected by encoder 75.For the first calibration antenna
60 is all consistent with the above process with the rotation process of the second calibration antenna 70.The motor 74 passes through mounting rack 76 and installation chassis 20
It is fixedly connected.
Above-mentioned installation chassis 20 is equipped with bracket, and above-mentioned power source is connected on bracket, and is additionally provided with and is connect on bracket
Receive electromagnetic horn.
Above-mentioned leveling structure includes several levelling foots, which includes telescopic prop 42 and be located at telescopic prop
The support component at 42 both ends, which includes support plate 41 and several adjust screw, support plate 41 and telescopic prop
42 by adjusting screw connection, by adjusting the elastic of screw is adjusted, realizes the horizontality to support plate 41.
The number of above-mentioned levelling foot is 3, realizes the water to support plate 41 by 3 levelling foots being triangularly arranged
Flat degree.
Above-mentioned marking apparatus further includes antenna house 10, which is located on installation chassis 20, and the first calibration antenna
60, the second calibration antenna 70 and standard metal ball 50 are located in antenna house 10.
Suitable 50 diameter of standard metal ball is chosen, makes radar work in optics area, guarantees radar detection standard metal ball
Reflective surface area is stablized when 50, is stablized with the echo strength Z parameter that this is calculated.
S120, using the echo amplitude of doppler echo examination criteria metal ball 50.
It is set up based on ground along 50 scaling method of radar radial direction high-speed motion standard metal ball, ground fixed frame sets standard gold
Belonging to ball 50 allows radar to be directed at detection object, eliminates antenna beam shape loss, and high-speed motion makes echo be detached from land clutter shadow
It rings, is filtered using Radar Doppler and eliminate land clutter influence, the echo amplitude of effective examination criteria metal ball 50.
S130, the radial motion speed for obtaining standard metal ball 50.
Specifically, according to radar detection minimum doppler velocity, 2 times of redundancies, 50 linear velocity of design standard metal ball, root are taken
According to the radar detection CPI period, 2 times of redundancies, 50 length of motion route of design standard metal ball are taken.
50 radial motion speed calculation basis radar running parameter of standard metal ball, the movement velocity of standard metal ball 50 exist
The Doppler modulation frequency generated in radar return should be higher than that 3 times of radar Doppler frequency resolution bandwidth.
The Doppler modulation frequency that 50 movement velocity of standard metal ball generates in radar return isvdFor mark
Radial motion speed of the metalloid ball 50 relative to radar, standard metal ball 50 are positive to radar direction movement velocity, Doppler
Frequency is positive, and is negative away from movement velocity, and Doppler frequency is negative.
Radar depends on radar running parameter to the detection resolution capability of Doppler frequency, when the full coherent of radar works, thunder
It is up to Doppler filter bandwidthN is FFT points or correlative accumulation umber of pulse, TrFor the direct impulse repetition period.
Radar filters out land clutter, 50 echo of examination criteria metal ball, it is contemplated that 3 times of design is superfluous by Doppler filter
Remaining, target speed corresponds to Doppler frequency fd>=3 Δ f, then 50 minimum movement speed of standard metal ball beBy taking X-band as an example, λ takes 3.2cm, N to take 64, Tr1000 μ s are taken, then vdFor ± 0.75m/s.By taking C-band as an example,
λ takes 5.5cm, N to take 64, Tr1000 μ s are taken, then vdFor ± 1.3m/s.By taking S-band as an example, λ takes 10cm, N to take 64, Tr1000 μ s are taken,
Then vdFor ± 2.3m/s.By taking L-band as an example, λ takes 30cm, N to take 64, Tr1000 μ s are taken, then vdFor ± 9.4m/s.
The purpose for calculating 50 radial motion speed of standard metal ball is determining minimum movement speed, enables standard metal ball 50
Enough by detections of radar, its reflection echo is flooded by land clutter when standard metal ball 50 is static, and radar can pass through doppler filtering
Ground moving object is detected, i.e., filters out land clutter using moving target Doppler frequency shift, moving target is detected, only detects mark
Metalloid ball 50 could demarcate radar data reduction using the Standard echo intensity of standard metal ball 50.
The parameter of S140, the parameter for obtaining radar and standard metal ball 50.
In the present embodiment, the parameter of radar includes radar wavelength, distance by radar, radar antenna azimuth beamwidth and bows
Face upward beam angle；The parameter of standard metal ball 50 includes the metal radius of a ball.When being demarcated to known radar, radar wavelength, radar
Antenna bearingt beam angle and pitching beam angle be it is known, distance by radar refer to radar to the detection of standard metal ball 50 away from
From distance by radar refers to distance between standard metal ball 50 and radar when radar detects standard metal ball 50, passes through Double deference GPS
Measurement obtains.
S150,50 place range bin pair of standard metal ball is calculated according to the parameter of radar and the parameter of standard metal ball 50
Z parameter is answered, to obtain 50 place range bin echo strength Z parameter calibration value of standard metal ball.
In the present embodiment, the range bin clawback intensity Z parameter calibration value where standard metal ball 50 refers to radar reflection
Rate coefficient true value.
In one embodiment, above-mentioned step S150 may include step S151~S153.
S151,50 place of standard metal ball is calculated by metal ball and the parameter of distance by radar and radar apart from library standard
Echo strength Z parameter；
S152, the parameter of radar is subtracted to respective distances library standard echo strength Z parameter, is formed where standard metal ball 50
Range bin error sample；
S153, error sample average is calculated according to 50 place range bin error sample of standard metal ball, to obtain standard gold
Belong to 50 place range bin echo strength Z parameter calibration value of ball.
It is according to meteorological radar equationWherein, PrFor target received power, G is radar day
Line gain, θ are radar antenna azimuth beamwidth,For radar antenna pitching beam angle, c is the light velocity, and r is target range, τ
For fire pulse width, | K |2For constant, between 0~20 DEG C of temperature, when particle is aquosity | K |2≈ 0.93, when ice state | K |2
≈ 0.2, Z are radar reflection rate coefficient, and λ is radar operation wavelength.
Wherein,β is the constant depending on radar system parameters, and r is radial distance of the target away from radar, and σ is
Cross section of radar targets RCS.σ=η V, η are using per unit volume target cross section as the radar reflectivity of measurement unit, and V is thunder
Up to the volume sampled,N is the scattering member number of unit volume, σiFor the backscattering cross of i-th of scatterer
Product.In formula | K |2For constant, between 0~20 DEG C of temperature, when particle is aquosity | K |2≈ 0.93, ice
When state | K |2≈ 0.2, DiFor i-th of particle diameter, radar reflection rate coefficient:Due to usually using millimeter as water
Drip diameter DiDimension, be considered as 1m3The summation occurred in unit volume, therefore the unit of usually Z is mm6/m3.For ice pellets,
The drop diameter that Di ice pellets melts completely when being water droplet.
In addition,
Radar cross section RCS is indicated with σ, can be equivalent to 50 perspective plane of standard metal ball for having equal echo with it
Product: σ=π a2；Then radar reflection rate coefficient true value are as follows:That is 50 place range bin echo of standard metal ball is strong
Spending Z parameter calibration value is50 place range bin echo strength Z parameter calibration value of standard metal ball and standard gold
Belong to 50 radius of ball and radar wavelength is directly proportional, with radar antenna azimuth beamwidth, pitching beam angle, distance by radar, radar
Pulse width product is inversely proportional.
S160, the processing of simulated target transmission power is carried out according to 50 place range bin of standard metal ball, to obtain setting up point
The simulated target signal transmission power of equivalence margin metal ball 50.
Calibration will count radar and receive 50 power of standard metal ball, statistics radar by theoretical calculated simulation mesh every time
Actual value when transmission power transmitting is marked, the received simulated target power of radar, the average function of calculating simulation object statistics are counted
The average power difference value that rate and standard metal ball 50 count, as calibration parameter, to the simulated target transmission power school of original setting
Standard, to obtain setting up the simulated target signal transmission power of point equivalence margin metal ball 50.
In one embodiment, above-mentioned step S160 may include step S161~S166.
S161, the echo signal power that radar receives standard metal ball 50 is obtained；
S162, the corresponding simulated target transmission power of standard metal ball 50 is calculated；
S163, replace standard metal ball 50 to radar emission simulated target signal with simulated target；
S164, adjustment simulated target transmission power, keep objective emission power equal with the echo amplitude of standard metal ball 50；
S165, Radar Signal Processing result is read；
S166, simulated target transmission power is adjusted according to Radar Signal Processing result, to obtain setting up point equivalence margin gold
Belong to the simulated target signal transmission power of ball 50.
Specifically, it is first depending on radar equation calculating, is then converted to simulated target transmission power, and pass through radar surveying
Adjustment, to obtain setting up the simulated target signal transmission power of point equivalence margin metal ball 50.
From 50 position of standard metal ball to radar emission simulated target signal power Pa, the increasing of simulated target transmitting antenna
Beneficial Ga, radar antenna effective aperture area is Ae, radar receives feeder line Insertion Loss L, this several parameters provide by radar is calibrated,
The simulated target amplitude P that radar receivesra:
The corresponding radar return signal power of standard metal ball 50 is Pr, so that simulated target is emitted corresponding radar by amendment and connect
Receipts machine receives power Pra=Pr, then simulated target amplitude and 50 radar return amplitude of standard metal ball are equal, can use simulation mesh
Mark replaces standard metal ball 50.
Calculate the corresponding simulated target transmission power of standard metal ball 50 are as follows:
According to this power setting and to radar emission simulated target signal, statistical measurement simulated target deviation, and to meter
The amendment of calculation value, accurate simulated target transmission power when being demarcated every time.
The radar n times launching simulation echo signal mean power of actual measurement are as follows:
Radar receives simulated target average power signal are as follows:
Radar receives metal ball average power signal are as follows:
Calculate amendment error: δpa=Pa-Pr；
By the simulated target transmission power after amendment error transfer factor are as follows: Pa0=Pa-δpa。
S170, full distance range is demarcated using simulated target.
In the present embodiment, full distance range refers to all range bins within the scope of radar range.
Specifically, the corresponding simulated target of standard metal ball 50 is calculated by range bin along radar radial distance direction emit function
Rate.
50 place range bin simulated target transmission power of establishing criteria metal ball, according to distance than square, by range bin meter
Simulated target transmission power is calculated, it is equivalent by 50 echo power of range bin standard metal ball, it calculates by range bin Z parameter true value.
Full distance range cannot be covered since standard metal ball 50 sets up point, using launching simulation target to full distance range
It is demarcated, according to the calibration mode of step S160, i.e., range bin simulated target where setting up point to standard metal ball 50 emits
Power is measured and calculated, and keeps it equal with 50 echo amplitude of standard metal ball, other range bins are according to same method, reference
Revised simulated target transmission power calculates.
S180, the echo strength Z parameter correction value for calculating each range bin of calibration each range bin.
The echo strength Z parameter correction value of each range bin is obtained, in order to establish corrected parameter table, guarantees radar surveying ginseng
Several accuracy.
In one embodiment, above-mentioned step S180 may include step S181~S183.
S181, by transmitting standard metal ball 50 calibrate after simulated target signal, to obtain the reflectivity of each range bin
Coefficient true value；
S182, the radar measurements and simulated target transmission power monitoring result for reading each range bin.
In the present embodiment, the radar measurements of each range bin include that output reflection rate coefficient and reflectivity factor are true
Value；The simulated target transmission power monitoring result includes that simulated target transmission power average value, simulated target transmission power are repaired
The deviation of echo strength Z parameter caused by positive coefficient and correction factor
S183, it is calculated according to the radar measurements and simulated target transmission power monitoring result of each range bin of reading
Reflectivity factor measurement system error, to obtain the echo strength Z parameter correction value of each range bin.
Obtain the deviation and radar output reflection of echo strength Z parameter caused by the correction factor of simulated target transmission power
The sum of rate coefficient and the deviation of reflectivity factor true value, to form the echo strength Z parameter correction value of each range bin.
Specifically, revised erection point simulated target transmission power is set as Pa0, correspond to the simulation mesh that radar receives
Mark power is Pra0, distance r between metal ball erection point and radara, it is obtained by radar equation:The
J range bin simulated target transmission power Pj0；The simulated target power that corresponding radar receives is Prj0；ThenAnd then it obtainsThen show with j-th of range bin simulated target transmission power Prj0
To radar emission simulated target signal, the signal width received with standard metal ball 50 in j-th of range bin high-speed motion radar
Spend it is equal, with transmitting Prj0Realize the intensity calibration of j-th of range bin.Calculate j-th of range bin radar reflection rate coefficient true value
Are as follows:Each range bin simulated target transmission power is obtained in a manner mentioned above and reflectivity factor is true
Value.
According to obtained each range bin simulated target transmission power and reflectivity factor true value, sent out by range bin to radar
Simulated target signal is penetrated, since there are errors with setup parameter for the simulated target transmission power actual parameter that sets every time, first
By monitoring realistic simulation objective emission power, the simulated target power of actual transmission is modified.Radar is adjusted the distance detection
Quantization minimum unit is range bin length, and a range bin length difference radar is different, and range bin length depends on radar
Signal bandwidth, 1Mhz bandwidth-distance library length 150m, such as radar maximum detectable range 400Km, share 2666 range bins, thunder
It is indicated up to detection range range bin number.Because intensive parameter of the same standard metal ball 50 in different distance library is different,
The transmission power that equivalent simulation target need to be calculated according to formula reads radar surveying intensity, by range bin meter to radar emission
Calculate calibration.
By taking j-th of range bin as an example, if j-th of range bin simulated target transmission power Pj, emitted by k times, obtain mould
Quasi- objective emission power average value:Simulated target transmission power correction factor are as follows:Correction factor
Caused echo strength deviation: δj0=10logKj。
Marking apparatus receives simulated target signal, output reflection rate coefficient Z to radar emission simulated target signal, radarj, instead
Penetrating rate coefficient true value is Zj0, n times measurement result is counted, j-th of range bin actual measurement reflectivity factor and true value deviation δ are obtainedzj1。
J-th of range bin Z parameter measured deviation are as follows:Wherein, ZjkIt is defeated for j-th of range bin kth time measurement
Reflectivity factor out.J-th range bin Z parameter measurement system error be measured deviation caused by simulated target transmission power with
The sum of radar outputting measurement value and true value deviation, i.e. δzj=δzj0+δzj1；In the manner described above, it demarcates to obtain Z parameter by range bin
Systematic error table, i.e. corrected parameter table, are stored in display and control terminal, when radar exports measurement parameter, table look-up and subtract systematic error,
As calibrated measurement parameter, j-th of range bin export Z parameter are as follows: Zj1=Zj-δzj。
S190, corrected parameter table is established according to the echo strength Z parameter correction value of each range bin；
It combines to form corrected parameter table according to all Z parameter measurement system errors got, utilizes the corrected parameter table
Each radar surveying value can be modified in practice.
Radar surveying value is corrected using corrected parameter table when S200, use, to obtain echo strength Z parameter calibration value.
Real-time monitoring simulated target transmission power and radar receive measurement Z parameter, form simulated target transmission power system
Error and radar measurement system error, synthesis form error sample average, obtain systematic features table, subtract in radar surveying
Systematic error is gone, realizes Z parameter calibration.
It is set up based on ground along 50 scaling method of radar radial direction high-speed motion standard metal ball, ground fixed frame sets standard gold
Belonging to ball 50 allows radar to be directed at detection object, eliminates antenna beam shape loss, and high-speed motion makes echo be detached from land clutter shadow
It rings, eliminating land clutter using Radar Doppler filter function influences, effective examination criteria metal ball 50, therefore the party is owned by France objective
Target designation method, the objective object of scientific utilization standard demarcate different radar data reductions, and selected standard metal ball 50 has
There are isotropic reflecting properties, is international radar area marker.Civil-military inosculation market is also required to energy
The marking apparatus of Fast Calibration task is enough executed, the target identification technology based on rcs measurement needs often calibration Radar RCS Measurement
Can, this scaling method has good popularization and application foreground in the civil-military inosculations field such as following civilian and military, such as stealthy
Microwave absorbing coatings recession feature measurement such as aircraft, stealth tank etc..
The scaling method can be realized to various types Weather Radar intensity Z parameter demarcate, both can with maneuver mode,
It can also fix and be erected at line calibration, the marking apparatus designed in this way is configured to each online weather radar, and mesh can be changed
Preceding weather radar service stage does not have the status of intensity calibration, increases substantially GPR Detection Data quality and weather forecast matter
Amount, has high economic benefit and social benefit.
Above-mentioned echo strength Z parameter scaling method sets up the standard metal along radar radial direction high-speed motion by ground
Ball 50 by the corresponding simulated target output amplitude of standard metal ball 50, then is calculated by range bin along radar radial distance direction and is marked
50 simulated target amplitude of metalloid ball realizes the calibration of radar echo intensity Z parameter, is surveyed according to the Z parameter that each range bin obtains
Amount systematic error combines to form corrected parameter table, can be in practice to each radar surveying value using the corrected parameter table
It is modified, realizes the precision and accuracy for improving calibration.
Fig. 7 is a kind of schematic block diagram of echo strength Z parameter caliberating device 300 provided in an embodiment of the present invention.Such as Fig. 7
It is shown, correspond to the above echo strength Z parameter scaling method, the present invention also provides a kind of echo strength Z parameter caliberating devices
300.The echo strength Z parameter caliberating device 300 includes the unit for executing above-mentioned echo strength Z parameter scaling method, should
Device can be configured in server.
Specifically, referring to Fig. 7, the echo strength Z parameter caliberating device 300 includes:
Doppler echo forms unit 301, is used for selection standard metal ball 50, is set up by ground so that standard metal ball
50 along radar radial direction high-speed motion, to form doppler echo；
Speed acquiring unit 302, for obtaining the radial motion speed of standard metal ball 50；
Echo amplitude detection unit 303, for the echo amplitude using doppler echo examination criteria metal ball 50；
Parameter acquiring unit 304, for obtaining the parameter of radar and the parameter of standard metal ball 50；
First calibration value acquiring unit 305, for calculating mark according to the parameter of radar and the parameter of standard metal ball 50
50 place range bin of metalloid ball corresponds to Z parameter, to obtain the calibration of 50 place range bin echo strength Z parameter of standard metal ball
Value；
Transmission power acquiring unit 306 emits function for carrying out simulated target according to 50 place range bin of standard metal ball
Rate processing, to obtain setting up the simulated target signal transmission power of point equivalence margin metal ball 50；
Unit 307 is demarcated, for demarcating using simulated target to full distance range；
Correction value acquiring unit 308, the echo strength Z parameter for calculating each range bin of calibration each range bin are corrected
Value；
Corrected parameter table establishes unit 309, for establishing amendment ginseng according to the echo strength Z parameter correction value of each range bin
Number table；
Second calibration value acquiring unit 310 is corrected radar surveying value using corrected parameter table when for using, to obtain
Echo strength Z parameter calibration value.
In one embodiment, the first calibration value acquiring unit 305 includes:
First parameter calculation subunit, for calculating standard metal by metal ball and the parameter of distance by radar and radar
50 place range bin Standard echo intensity Z parameter of ball；
First error sample acquisition subelement, for the parameter of radar to be subtracted respective distances library standard echo strength Z ginseng
Number forms 50 place range bin error sample of standard metal ball；
First calibration value obtains subelement, for calculating error sample according to 50 place range bin error sample of standard metal ball
This mean value, to obtain 50 place range bin echo strength Z parameter calibration value of standard metal ball.
In one embodiment, above-mentioned transmission power acquiring unit 306 includes:
Echo signal power obtains subelement, and the echo signal power of standard metal ball 50 is received for obtaining radar；
Power calculation subelement, for calculating the corresponding simulated target transmission power of standard metal ball 50；
Emit subelement, for replacing standard metal ball 50 to radar emission simulated target signal with simulated target；
The first adjustment subelement makes objective emission power and standard metal ball 50 for adjusting simulated target transmission power
Echo amplitude it is equal；
Reading subunit, for reading Radar Signal Processing result；
Second adjustment subelement, for adjusting simulated target transmission power according to Radar Signal Processing result, to obtain frame
The simulated target signal transmission power for the equivalence margin metal ball 50 that sets up an office.
In one embodiment, correction value acquiring unit 308 includes:
True value obtains subelement, each to obtain for the simulated target signal after being calibrated by transmitting standard metal ball 50
The reflectivity factor true value of range bin；
As a result subelement is obtained, for reading radar measurements and the monitoring of simulated target transmission power of each range bin
As a result；
Error calculation subelement, for emitting function according to the radar measurements and simulated target of each range bin of reading
Rate monitoring result calculates reflectivity factor measurement system error, to obtain the echo strength Z parameter correction value of each range bin.
It should be noted that it is apparent to those skilled in the art that, above-mentioned echo strength Z parameter calibration
The specific implementation process of device 300 and each unit, can be with reference to the corresponding description in preceding method embodiment, for the side of description
Just and succinctly, details are not described herein.
Above-mentioned echo strength Z parameter caliberating device 300 can be implemented as a kind of form of computer program, the computer journey
Sequence can be run in computer equipment as shown in Figure 8.
Referring to Fig. 8, Fig. 8 is a kind of schematic block diagram of computer equipment provided by the embodiments of the present application.The computer
Equipment 500 is server, and server can be independent server, is also possible to the server cluster of multiple server compositions.
Refering to Fig. 8, which includes processor 502, memory and the net connected by system bus 501
Network interface 505, wherein memory may include non-volatile memory medium 503 and built-in storage 504.
The non-volatile memory medium 503 can storage program area 5031 and computer program 5032.The computer program
5032 include program instruction, which is performed, and processor 502 may make to execute a kind of echo strength Z parameter calibration
Method.
The processor 502 is for providing calculating and control ability, to support the operation of entire computer equipment 500.
The built-in storage 504 provides environment for the operation of the computer program 5032 in non-volatile memory medium 503, should
When computer program 5032 is executed by processor 502, processor 502 may make to execute a kind of echo strength Z parameter scaling method.
The network interface 505 is used to carry out network communication with other equipment.It will be understood by those skilled in the art that in Fig. 8
The structure shown, only the block diagram of part-structure relevant to application scheme, does not constitute and is applied to application scheme
The restriction of computer equipment 500 thereon, specific computer equipment 500 may include more more or fewer than as shown in the figure
Component perhaps combines certain components or with different component layouts.
Wherein, the processor 502 is for running computer program 5032 stored in memory, to realize following step
It is rapid:
Selection standard metal ball 50 is set up by ground so that standard metal ball 50 is along radar radial direction high-speed motion, with shape
At doppler echo；
Using the echo amplitude of doppler echo examination criteria metal ball 50；
Obtain the radial motion speed of standard metal ball 50；
Obtain the parameter of radar and the parameter of standard metal ball 50；
50 place range bin of standard metal ball, which is calculated, according to the parameter of radar and the parameter of standard metal ball 50 corresponds to Z ginseng
Number, to obtain 50 place range bin echo strength Z parameter calibration value of standard metal ball；
The processing of simulated target transmission power is carried out according to 50 place range bin of standard metal ball, to obtain setting up the criterions such as point
The simulated target signal transmission power of metalloid ball 50；
Full distance range is demarcated using simulated target；
The echo strength Z parameter correction value of each range bin is calculated each range bin of calibration；
Corrected parameter table is established according to the echo strength Z parameter correction value of each range bin；
Radar surveying value is corrected using corrected parameter table when use, to obtain echo strength Z parameter calibration value.
In one embodiment, processor 502 realize it is described according to the parameter of radar and the parameter of standard metal ball 50
It calculates 50 place range bin of standard metal ball and corresponds to Z parameter, to obtain 50 place range bin echo strength Z parameter of standard metal ball
When calibration value step, it is implemented as follows step:
50 place range bin Standard echo of standard metal ball is calculated by metal ball and the parameter of distance by radar and radar
Intensity Z parameter；
The parameter of radar is subtracted into respective distances library standard echo strength Z parameter, forms 50 place distance of standard metal ball
Library error sample；
Error sample average is calculated according to 50 place range bin error sample of standard metal ball, to obtain standard metal ball 50
Place range bin echo strength Z parameter calibration value.
In one embodiment, processor 502 described carries out simulation mesh according to 50 place range bin of standard metal ball realizing
Transmission power processing is marked, when obtaining setting up the simulated target signal transmission power step of point equivalence margin metal ball 50, specifically
Realize following steps:
Obtain the echo signal power that radar receives standard metal ball 50；
Calculate the corresponding simulated target transmission power of standard metal ball 50；
Replace standard metal ball 50 to radar emission simulated target signal with simulated target；
Simulated target transmission power is adjusted, keeps objective emission power equal with the echo amplitude of standard metal ball 50；
Read Radar Signal Processing result；
Simulated target transmission power is adjusted according to Radar Signal Processing result, to obtain setting up point equivalence margin metal ball 50
Simulated target signal transmission power.
In one embodiment, processor 502 realize it is described using simulated target to full distance range progress demarcating steps
When, it is implemented as follows step:
The corresponding simulated target transmission power of standard metal ball 50 is calculated by range bin along radar radial distance direction.
In one embodiment, the echo that processor 502 calculates each range bin in each range bin for realizing described pair of calibration is strong
When spending Z parameter correction value step, it is implemented as follows step:
Simulated target signal after being calibrated by transmitting standard metal ball 50, it is true with the reflectivity factor for obtaining each range bin
Value；
Read the radar measurements and simulated target transmission power monitoring result of each range bin；
Reflection is calculated according to the radar measurements of each range bin of reading and simulated target transmission power monitoring result
Rate coefficient measurement system error, to obtain the echo strength Z parameter correction value of each range bin.
Wherein, the radar measurements of each range bin include output reflection rate coefficient and reflectivity factor true value；
The simulated target transmission power monitoring result includes simulated target transmission power average value, simulated target transmission power amendment system
The deviation of echo strength Z parameter caused by several and correction factor.
In one embodiment, processor 502 in the radar measurements for realizing each range bin according to reading and
Simulated target transmission power monitoring result calculates reflectivity factor measurement system error, to obtain the echo strength Z of each range bin
When parameter correction values step, it is implemented as follows step:
Obtain the deviation and radar output reflection of echo strength Z parameter caused by the correction factor of simulated target transmission power
The sum of rate coefficient and the deviation of reflectivity factor true value, to form the echo strength Z parameter correction value of each range bin.
It should be appreciated that in the embodiment of the present application, processor 502 can be central processing unit (Central
Processing Unit, CPU), which can also be other general processors, digital signal processor (Digital
Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit,
ASIC), ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic
Device, discrete gate or transistor logic, discrete hardware components etc..Wherein, general processor can be microprocessor or
Person's processor is also possible to any conventional processor etc..
Those of ordinary skill in the art will appreciate that be realize above-described embodiment method in all or part of the process,
It is that relevant hardware can be instructed to complete by computer program.The computer program includes program instruction, computer journey
Sequence can be stored in a storage medium, which is computer readable storage medium.The program instruction is by the department of computer science
At least one processor in system executes, to realize the process step of the embodiment of the above method.
Those of ordinary skill in the art will appreciate that be realize above-described embodiment method in all or part of the process, be
Relevant hardware can be instructed to complete by computer program, computer program can be stored in a storage medium, this is deposited
Storage media is computer readable storage medium.In the embodiment of the present invention, which can be stored in computer system
It in storage medium, and is executed by least one processor in the computer system, to realize including such as above-mentioned each echo strength Z
The process step of the embodiment of parameter calibration method.
The storage medium can be USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), magnetic disk
Or the various computer readable storage mediums that can store program code such as CD.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware
With the interchangeability of software, each exemplary composition and step are generally described according to function in the above description.This
A little functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Specially
Industry technical staff can use different methods to achieve the described function each specific application, but this realization is not
It is considered as beyond the scope of this invention.
In several embodiments provided by the present invention, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary.For example, the division of each unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation.Such as multiple units or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.
The steps in the embodiment of the present invention can be sequentially adjusted, merged and deleted according to actual needs.This hair
Unit in bright embodiment device can be combined, divided and deleted according to actual needs.In addition, in each implementation of the present invention
Each functional unit in example can integrate in one processing unit, is also possible to each unit and physically exists alone, can also be with
It is that two or more units are integrated in one unit.
If the integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product,
It can store in one storage medium.Based on this understanding, technical solution of the present invention is substantially in other words to existing skill
The all or part of part or the technical solution that art contributes can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, terminal or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. echo strength Z parameter scaling method characterized by comprising
Selection standard metal ball is set up by ground so that standard metal ball is along radar radial direction high-speed motion, to form Doppler
Echo；
Using the echo amplitude of doppler echo examination criteria metal ball；
Obtain the radial motion speed of standard metal ball；
Obtain the parameter of radar and the parameter of standard metal ball；
Range bin where calculating standard metal ball according to the parameter of radar and the parameter of standard metal ball corresponds to Z parameter, with
Range bin echo strength Z parameter calibration value where to standard metal ball；
The processing of simulated target transmission power is carried out according to range bin where standard metal ball, to obtain setting up point equivalence margin metal
The simulated target signal transmission power of ball；
Full distance range is demarcated using simulated target；
The echo strength Z parameter correction value of each range bin is calculated each range bin of calibration；
Corrected parameter table is established according to the echo strength Z parameter correction value of each range bin；
Radar surveying value is corrected using corrected parameter table when use, to obtain echo strength Z parameter calibration value.
2. echo strength Z parameter scaling method according to claim 1, which is characterized in that the parameter according to radar
And standard metal ball parameter calculate standard metal ball where range bin correspond to Z parameter, with obtain standard metal ball place away from
From library echo strength Z parameter calibration value, comprising:
Range bin Standard echo intensity Z where calculating standard metal ball by metal ball and the parameter of distance by radar and radar joins
Number；
The parameter of radar is subtracted into respective distances library standard echo strength Z parameter, forms range bin error where standard metal ball
Sample；
Error sample average is calculated according to range bin error sample where standard metal ball, to obtain distance where standard metal ball
Library echo strength Z parameter calibration value.
3. echo strength Z parameter scaling method according to claim 2, which is characterized in that described according to standard metal ball
Place range bin carries out the processing of simulated target transmission power, to obtain setting up the simulated target signal hair of point equivalence margin metal ball
Penetrate power, comprising:
Obtain the echo signal power that radar receives standard metal ball；
It calculates standard metal ball and corresponds to simulated target transmission power；
Replace standard metal ball to radar emission simulated target signal with simulated target；
Simulated target transmission power is adjusted, keeps objective emission power equal with the echo amplitude of standard metal ball；
Read Radar Signal Processing result；
Simulated target transmission power is adjusted according to Radar Signal Processing result, to obtain setting up the simulation of point equivalence margin metal ball
Echo signal transmission power.
4. echo strength Z parameter scaling method according to claim 3, which is characterized in that described to utilize simulated target pair
Full distance range is demarcated, comprising:
Standard metal ball, which is calculated, by range bin along radar radial distance direction corresponds to simulated target transmission power.
5. echo strength Z parameter scaling method according to claim 4, which is characterized in that each distance of described pair of calibration
Library calculates the echo strength Z parameter correction value of each range bin, comprising:
By the simulated target signal after transmitting standard metal ball sizing, to obtain the reflectivity factor true value of each range bin；
Read the radar measurements and simulated target transmission power monitoring result of each range bin；
Reflectivity system is calculated according to the radar measurements of each range bin of reading and simulated target transmission power monitoring result
Number measurement system error, to obtain the echo strength Z parameter correction value of each range bin.
6. echo strength Z parameter scaling method according to claim 5, which is characterized in that the radar of each range bin
Measurement result includes output reflection rate coefficient and reflectivity factor true value；The simulated target transmission power monitoring result includes
The ginseng of echo strength Z caused by simulated target transmission power average value, simulated target transmission power correction factor and correction factor
Several deviations.
7. echo strength Z parameter scaling method according to claim 6, which is characterized in that it is described according to reading it is each away from
Radar measurements and simulated target transmission power monitoring result from library calculate reflectivity factor measurement system error, with
To the echo strength Z parameter correction value of each range bin, comprising:
Obtain deviation and the radar output reflection rate system of echo strength Z parameter caused by the correction factor of simulated target transmission power
The sum of several and deviation of reflectivity factor true value, to form the echo strength Z parameter correction value of each range bin.
8. echo strength Z parameter caliberating device characterized by comprising
Doppler echo forms unit, is used for selection standard metal ball, is set up by ground so that standard metal ball is along radar diameter
To high-speed motion, to form doppler echo；
Speed acquiring unit, for obtaining the radial motion speed of standard metal ball；
Echo amplitude detection unit, for the echo amplitude using doppler echo examination criteria metal ball；
Parameter acquiring unit, for obtaining the parameter of radar and the parameter of standard metal ball；
First calibration value acquiring unit, for calculating standard metal ball institute according to the parameter of radar and the parameter of standard metal ball
Z parameter is corresponded in range bin, to obtain range bin echo strength Z parameter calibration value where standard metal ball；
Transmission power acquiring unit, for carrying out the processing of simulated target transmission power according to range bin where standard metal ball, with
Obtain setting up the simulated target signal transmission power of point equivalence margin metal ball；
Unit is demarcated, for demarcating using simulated target to full distance range；
Correction value acquiring unit, for calculating each range bin of calibration the echo strength Z parameter correction value of each range bin；
Corrected parameter table establishes unit, for establishing corrected parameter table according to the echo strength Z parameter correction value of each range bin；
Second calibration value acquiring unit corrects radar surveying value using corrected parameter table when for using, strong to obtain echo
Spend Z parameter calibration value.
9. a kind of computer equipment, which is characterized in that the computer equipment includes memory and processor, on the memory
It is stored with computer program, the processor is realized as described in any one of claims 1 to 7 when executing the computer program
Method.
10. a kind of storage medium, which is characterized in that the storage medium is stored with computer program, the computer program quilt
Processor can realize the method as described in any one of claims 1 to 7 when executing.
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| CN111190149A (en) * | 2020-01-13 | 2020-05-22 | 南京航空航天大学 | C-band polarization meteorological radar external calibration method based on analog calibration body |
| CN111537965A (en) * | 2020-04-28 | 2020-08-14 | 中国气象局气象探测中心 | Weather radar calibration method and system based on unmanned aerial vehicle |
| CN111537965B (en) * | 2020-04-28 | 2020-11-03 | 中国气象局气象探测中心 | Weather radar calibration method and system based on unmanned aerial vehicle |
| CN113325404A (en) * | 2021-05-26 | 2021-08-31 | Oppo广东移动通信有限公司 | Method and device for measuring equipment distance and electronic equipment |
| CN114217278A (en) * | 2021-12-14 | 2022-03-22 | 齐鲁空天信息研究院 | Dynamic target-based amplitude and phase calibration method and system for phased array radar |
| CN114217278B (en) * | 2021-12-14 | 2023-03-24 | 齐鲁空天信息研究院 | Dynamic target-based amplitude and phase calibration method and system for phased array radar |
| CN115963467A (en) * | 2023-03-16 | 2023-04-14 | 福思(杭州)智能科技有限公司 | Method and device for processing frequency modulation waveform parameters and computer equipment |
| CN115963467B (en) * | 2023-03-16 | 2023-06-06 | 福思(杭州)智能科技有限公司 | Processing method and device for frequency modulation waveform parameters and computer equipment |
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