CN105738876A - Device for calibrating instantaneous Doppler frequency offset of PD radar seeker echo simulator - Google Patents
Device for calibrating instantaneous Doppler frequency offset of PD radar seeker echo simulator Download PDFInfo
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Abstract
The invention discloses a device for calibrating the instantaneous Doppler frequency offset of a PD radar seeker echo simulator, and the device comprise a frequency mixing module, a data collection module, a data analysis module and a parameter extraction module, wherein the frequency mixing module, the data collection module, the data analysis module and the parameter extraction module are coupled to each other. The frequency mixing module is used for the frequency mixing of an echo signal, and enabling a mixed signal to be transmitted to the data collection module. The data collection module enables the collected data to be transmitted to the data analysis module, and the data analysis module transmits the processed data to the parameter extraction module, and carries out calibration according to the data extracted by the parameter extraction module. The device is based on the technology of virtual instruments, makes the most of a conventional instrument, combines the technology of virtual instruments, enables a plurality of original functions which have to be achieved through high-level hardware to be completed through software, achieves the automation of testing control, improves the calibration efficiency, avoids a manual measurement error caused by manual operation, and does not need to disassemble an echo simulator during calibration.
Description
Technical field
The present invention relates to Active Radar to guide, particularly relate to PD radar seeker echo simulator instantaneous Doppler frequency offset correction device.
Background technology
Along with the development of missilery, have become as the primary armament in air defense field with the Kind of Long-Range Airborne Missile that active radar target seeker is feature.The type guided missile is bigger due to target velocity, its active radar target seeker all have employed pulse Doppler (PD) signal form, when its operation principle is missile flight, active radar target seeker is to the straight ripple signal of target direction pulses of radiation ultrasound modality, straight ripple signal forms echo-signal after being reflected, target seeker receives echo-signal and processes, obtain the information such as the angle of target, speed, distance, missile flight control system missile-borne computer guides target according to these information independence, until hit.
As the active radar target seeker of one of air-to-air missile critical component in the development stage, it is necessary to carry out substantial amounts of emulation testing test, to the detection of radar, catch, the performance such as Search/Track carries out examination checking.And general outfield live shell target is had a try, and although to test be the most real guided missile live simulation, but it needs to expend substantial amounts of manpower and materials, experimentation cost is expensive, not being suitable for active radar target seeker development stage Performance Assessment to use, generally it is only used as the checking of the final Performance Assessment after guided missile entirety has been developed.Therefore, it is possible to provide the electromagnetic environment of a simulation real work state just to seem increasingly important for active radar target seeker work in laboratory.And active radar target seeker Hardware-in-loop Simulation Experimentation can repeat in laboratory, having possessed higher practicality, thus its effect played in active radar target seeker development process is also more and more important.It is active radar target seeker echo simulator that the test of active radar target seeker semi-hardware type simulation test mainly realizes equipment, its major function is produce an echo-signal comprising target signature information, simulate true radar target signal, be used for testing, verify, examine active radar target seeker service behaviour.Therefore whether whether echo-signal produced by active radar target seeker echo simulator accurately significant accurately and reliably for active radar target seeker test result.Namely the present invention completes the calibration operation of the instantaneous frequency deviation parameter to active radar target seeker echo simulator thus ensureing the accuracy of the instantaneous frequency deviation of echo-signal that echo simulator produces.
At present the calibration of radar seeker target echo simulator is adopted mostly to the calibration steps of subpackage dismountable, namely all kinds of multimeters of composition echo simulator are calibrated respectively, then it is attached being assembled into radar seeker target echo simulator by the instrument calibrated again, this metering method can only ensure the performance of all kinds of multimeter, and have ignored the overall performance of echo simulator, thus there is limitation.
Summary of the invention
Present invention seek to address that the problem that glass melter melting end tank block local erosion is serious, and a kind of resistant to corrosion glass melter melting end tank block provided.
In order to reach above-mentioned purpose, provide a kind of PD radar seeker echo simulator instantaneous Doppler frequency offset correction device, including the frequency mixing module intercoupled, data acquisition module, data analysis module, and parameter extraction module, what wherein said mixing rubbed is mixed echo-signal, and the signal after mixing is transferred to described data acquisition module, the data collected are transferred to described data analysis module by described data acquisition module, the data that described data analysis module processes are transferred to described parameter extraction module, and it is calibrated according to the data that described parameter extraction module is extracted.
In some embodiments, described echo-signal down-converts to intermediate-freuqncy signal through described frequency mixing module.
In some embodiments, described data acquisition module completes the intermediate-freuqncy signal after frequency conversion and reservation signal are carried out data acquisition.
In some embodiments, described data analysis module completes oscillograph is exported the quadrature demodulation of signal.
In some embodiments, the data after collection arrive described data analysis module through gpib bus.
The present invention is based on virtual instrument technique, utilize existing instrument to greatest extent, combined with virtual technical device, many must be completed original by software by high-grade hard-wired function, it is achieved the automatization of testing and control, improve calibration efficiency, avoid the artificial measurement error introduced by manual operation, without echo simulator is dismantled during calibration, but directly the echo-signal of echo simulator output is calibrated, thus calibration result can embody the overall performance of echo simulator.
Accompanying drawing explanation
In conjunction with accompanying drawing, by detailed description below, the above-mentioned and other feature and advantage of the present invention can be more clearly understood that, wherein:
Fig. 1 is the schematic diagram of active radar target seeker echo simulator instantaneous frequency deviation parametric calibration device according to embodiments of the present invention；
Fig. 2 be calibrating installation realize block diagram；And
Fig. 3 is the theory diagram of quadrature demodulation.
Detailed description of the invention
Referring to the accompanying drawing of the specific embodiment of the invention, the present invention is described in more detail.But, the present invention can realize in many different forms, and should not be construed as by restriction of the embodiment of proposition at this.On the contrary, it is proposed to these embodiments are to reach fully and complete disclosure, and make those skilled in the art understand the scope of the present invention completely.
Description, describe a kind of PD radar seeker echo simulator instantaneous Doppler frequency offset correction device according to embodiments of the present invention in detail, including the frequency mixing module intercoupled, data acquisition module, data analysis module, and parameter extraction module, what wherein said mixing rubbed is mixed echo-signal, and the signal after mixing is transferred to described data acquisition module, the data collected are transferred to described data analysis module by described data acquisition module, the data that described data analysis module processes are transferred to described parameter extraction module, and it is calibrated according to the data that described parameter extraction module is extracted.Described echo-signal down-converts to intermediate-freuqncy signal through described frequency mixing module.Described data acquisition module completes the intermediate-freuqncy signal after frequency conversion and reservation signal are carried out data acquisition.Described data analysis module completes oscillograph is exported the quadrature demodulation of signal.Data after collection arrive described data analysis module through gpib bus.
Shown in the straight ripple signal such as formula (1) that active radar target seeker produces:
(1)
In formula, P (t) is width isAmplitude is the individual pulse of 1, and T is the repetition period.UtFor pulse amplitude, f0For frequency of carrier signal,For carrier signal first phase.During missile flight, active radar target seeker sends the straight ripple signal as shown in formula (1), and signal reflects formation echo-signal and received by active radar target seeker when running into target.Compared with straight ripple signal, echo-signal is just being received by active radar target seeker after transmission after a while, therefore the pulse envelope of echo-signal can produce a time delay, simultaneously because there is radial velocity between guided missile and target, according to Doppler range rate measurement principle, now adding a Doppler frequency on the carrier frequency of echo-signal, active radar target seeker determines the speed of target, range information by the time delay in detection echo-signal and Doppler frequency.Shown in the form of echo-signal such as formula (2):
(2)
In formula,For time delay, fdFor Doppler frequency.Work as fdRepresent during for constant that target makes uniform motion relative to guided missile, and target does variable motion relative to guided missile under normal circumstances, now fdChange over, formula (3) represent:
(3)
In formula, K is a constant.Formula (3) is substituted into formula (2) obtain:
(4)
Formula (4) is the echo-signal that active radar target seeker echo simulator produces, and it is considered as an arteries and veins internal linear FM signal.The purpose of the present invention is namely to the instantaneous frequency deviation in echo-signal shown in formula (4)It is calibrated.
Fig. 1 is the schematic diagram of the active radar target seeker echo simulator instantaneous frequency deviation parametric calibration device of the present invention.Calibrating installation is divided into four modules, is respectively as follows: frequency mixing module, data acquisition module, data analysis module and parameter extraction module.Frequency mixing module is realized by audiofrequency spectrometer, data acquisition module is realized by oscillograph, oscillograph is connected with computer by gpib bus, data analysis module and parameter extraction module use computer software programming to realize, wherein data analysis module mainly completes oscillograph is exported the quadrature demodulation of signal, and parameter extraction module for extracting parameter value from demodulating data.Fig. 2 be calibrating installation realize block diagram.
Quadrature demodulation function in data analysis module uses Labview programming software to realize.The theory diagram of quadrature demodulation as it is shown on figure 3, in figure NCO be digital controlled oscillator, produce local carrier, LPF is low pass filter.Use this demodulation method can obtain the modulation amplitude of signal, phase place and frequency.The frequency wherein modulating signal is active radar target seeker echo simulator instantaneous frequency deviation measured value of parameters.
The present invention is based on virtual instrument technique, utilize existing instrument to greatest extent, combined with virtual technical device, many must be completed original by software by high-grade hard-wired function, it is achieved the automatization of testing and control, improve calibration efficiency, avoid the artificial measurement error introduced by manual operation, without echo simulator is dismantled during calibration, but directly the echo-signal of echo simulator output is calibrated, thus calibration result can embody the overall performance of echo simulator.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.All technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (5)
1. a PD radar seeker echo simulator instantaneous Doppler frequency offset correction device, it is characterized in that, including the frequency mixing module intercoupled, data acquisition module, data analysis module, and parameter extraction module, what wherein said mixing rubbed is mixed echo-signal, and the signal after mixing is transferred to described data acquisition module, the data collected are transferred to described data analysis module by described data acquisition module, the data that described data analysis module processes are transferred to described parameter extraction module, and it is calibrated according to the data that described parameter extraction module is extracted.
2. PD radar seeker echo simulator instantaneous Doppler frequency offset correction device according to claim 1, it is characterised in that described echo-signal down-converts to intermediate-freuqncy signal through described frequency mixing module.
3. PD radar seeker echo simulator instantaneous Doppler frequency offset correction device according to claim 2, it is characterised in that described data acquisition module completes the intermediate-freuqncy signal after frequency conversion and reservation signal are carried out data acquisition.
4. PD radar seeker echo simulator instantaneous Doppler frequency offset correction device according to claim 3, it is characterised in that described data analysis module completes oscillograph is exported the quadrature demodulation of signal.
5. PD radar seeker echo simulator instantaneous Doppler frequency offset correction device according to claim 1, it is characterised in that the data after collection arrive described data analysis module through gpib bus.
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Cited By (7)
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| CN107271975A (en) * | 2017-06-16 | 2017-10-20 | 北京理工大学 | The radar return Doppler frequency coherent analogy method measured in real time based on frequency |
| CN108107413A (en) * | 2018-01-09 | 2018-06-01 | 中国空空导弹研究院 | A kind of radar simulator calibration system |
| CN109581053A (en) * | 2018-12-11 | 2019-04-05 | 上海精密计量测试研究所 | A kind of method and device based on vector analysis calibration frequency modulation deviation amount |
| CN109946691A (en) * | 2019-04-03 | 2019-06-28 | 北京行易道科技有限公司 | The realization method and system of radar simulator simulated target object, radar simulator |
| CN111654338A (en) * | 2020-05-07 | 2020-09-11 | Oppo广东移动通信有限公司 | Doppler parameter estimation method, device and storage medium |
| CN113639587A (en) * | 2021-06-22 | 2021-11-12 | 北京航天飞腾装备技术有限责任公司 | Method and system for measuring output delay of strapdown passive anti-radiation seeker |
| CN115567133A (en) * | 2022-10-11 | 2023-01-03 | 上海精密计量测试研究所 | Method for calibrating Doppler frequency parameters of Universal Serial Bus (USB) space-based measurement and control communication system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271975A (en) * | 2017-06-16 | 2017-10-20 | 北京理工大学 | The radar return Doppler frequency coherent analogy method measured in real time based on frequency |
| CN107271975B (en) * | 2017-06-16 | 2018-10-09 | 北京理工大学 | The radar return Doppler frequency coherent analogy method measured in real time based on frequency |
| CN108107413A (en) * | 2018-01-09 | 2018-06-01 | 中国空空导弹研究院 | A kind of radar simulator calibration system |
| CN108107413B (en) * | 2018-01-09 | 2020-10-27 | 中国空空导弹研究院 | Radar target simulator calibration system |
| CN109581053A (en) * | 2018-12-11 | 2019-04-05 | 上海精密计量测试研究所 | A kind of method and device based on vector analysis calibration frequency modulation deviation amount |
| CN109946691A (en) * | 2019-04-03 | 2019-06-28 | 北京行易道科技有限公司 | The realization method and system of radar simulator simulated target object, radar simulator |
| CN111654338A (en) * | 2020-05-07 | 2020-09-11 | Oppo广东移动通信有限公司 | Doppler parameter estimation method, device and storage medium |
| CN111654338B (en) * | 2020-05-07 | 2022-07-19 | Oppo广东移动通信有限公司 | Doppler parameter estimation method, device and storage medium |
| CN113639587A (en) * | 2021-06-22 | 2021-11-12 | 北京航天飞腾装备技术有限责任公司 | Method and system for measuring output delay of strapdown passive anti-radiation seeker |
| CN115567133A (en) * | 2022-10-11 | 2023-01-03 | 上海精密计量测试研究所 | Method for calibrating Doppler frequency parameters of Universal Serial Bus (USB) space-based measurement and control communication system |
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Application publication date: 20160706 |