CN102662163B - Digital control device based on microprocessor ARM (Advanced RISC Machines) and radar active calibrator - Google Patents
Digital control device based on microprocessor ARM (Advanced RISC Machines) and radar active calibrator Download PDFInfo
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Abstract
The invention provides a digital control device based on a microprocessor ARM (Advanced RISC Machines), which is used for controlling a microwave assembly of a radar active calibrator works between a self-calibration mode and a transmission mode. Under the self-calibration mode, a gain of the microwave assembly is adjusted according to temperature data of a temperature monitoring module, and is compared with a reference signal inside the microwave assembly, so that the self-calibration of the microwave assembly is realized. Under the transmission mode, a radar signal is received in the microwave assembly through a receiving-transmitting antenna, and is transmitted to radar after being amplified through the microwave assembly. The equipment is radar active calibration equipment with convenience in outdoor work, stable property, high integration density and high precision.
Description
Technical field
The present invention relates to the radar calibration technical field of clutter test, particularly a kind of numerical control device and radar active calibrating device based on ARM.
Background technology
At present, when utilizing radar system admission clutter data, in order when follow-up data is processed, to obtain the absolute value of clutter data, need to carry out in real time effectively calibration to radar system.
Generally speaking, calibration steps is divided into relative calibration and absolute calibration, relative calibration is also referred to as internal calibration, adopt respectively loss or the response function of measuring system all parts to determine emissive power and received power, perhaps adopt the method for the ratio of only calibrating received power and emissive power to come measuring system is calibrated.Absolute calibration is also referred to as external calibration, adopts the scattered signal of calibration target to provide the method for calibration level that measuring system is calibrated.
Calibration target in the absolute calibration generally is divided into passive target (such as metal ball, corner reflector and Luneberg lens reflector) and active target (such as the active calibrating device of radar).Adopt passive calibration target to be called without source calibration as the calibration of measuring basis, adopting active calibration target to be called as the calibration of measuring basis has source calibration.Advantage without source calibration is simple to operate, and technical being easy to realized, but owing to be subjected to the restriction of volume and weight, passive calibration target often is difficult to realize larger Radar Cross Section (RCS).Compare without source calibration, the advantage that source calibration is arranged is that RCS is adjustable, can take into account the volume and weight of calibration target when realizing larger RCS, calibration accuracy is high, the abundant information of record, but the design of active correcting device is complicated, debug difficulties, cost are relatively high.
Therefore, in the clutter test, in order to take into account portable and signal to noise ratio (S/N ratio) demand, adopt active calibrating mode that radar system is calibrated.The radar active calibrating device is positioned in the less ground clutter background of backscattering coefficient usually, and its effect is for radar provides with reference to forward signal, the radar system parameter is calibrated, thereby the ground scatter clutter data that obtain are carried out quantitative analysis.
What common radar active calibrating device adopted is single-chip microcomputer control technology, single-chip microcomputer is directly controlled the devices such as microwave switch, coarse adjustment attenuator, fine setting attenuator and adjustable attenuator by Transistor-Transistor Logic level, and data are carried out acquisition and processing, then send computing machine to by serial ports, finished demonstration and the storage of data by computing machine.Therefore, common calibrating device system depends on computing machine strongly, do not have computing machine or just can't carry out actual calibration operation with communicating by letter of computing machine is not smooth, computing machine and connection cable thereof are the requisite ingredients of calibrating device system, will increase like this facility load, the burden of powering and the cable of being connected and connect the failure risk that causes.And common radar active calibrating device adopts the control method of mechanical key usually, has so both increased the connection cable between parts, has increased again the complicacy of Single Chip Microcomputer (SCM) program, has also increased the maintenance difficulty of calibrating device simultaneously.
Summary of the invention
In order to address the above problem, the invention provides a kind of numerical control device based on ARM and radar active calibrating device, this equipment is for ease of field work, stable performance, high integration and high-precision radar active correcting device.
Numerical control device based on microprocessor ARM of the present invention, the microwave components that is used for the active calibrating device of control radar makes it work in self calibration and two kinds of patterns of forwarding, under described self calibration pattern, temperature data according to described temperature monitoring module is adjusted the gain of described microwave components, and compare with the built-in reference signal of described microwave components, to realize the self calibration of described microwave components, under described forward mode, radar signal is received to described microwave components by dual-mode antenna, then is transmitted to radar by described dual-mode antenna after described microwave components amplifies.
Wherein, described numerical control device comprises ARM development board and data acquisition circuit, wherein, described ARM development board, be used for obtaining the temperature data of described temperature monitoring module, obtain longitude, latitude, time and the sea level elevation data of described GPS module, obtain the output power levels data of described microwave components, and the data analysis that obtains is processed, stored and shows; Described data acquisition circuit is used for temperature data and the described microwave components output power levels data of described temperature monitoring module are gathered, and sends described ARM development board to by serial ports.
Wherein, described ARM development board is used for the calibrating device system is carried out self check, by saying the word to microwave components, data acquisition circuit and GPS module to confirm whether each module is working properly.
Wherein, described ARM development board is further used for by serial ports the coarse adjustment attenuator in the microwave components and fine setting attenuator being controlled to realize that RCS arranges function.
In addition, described ARM development board is further used for by serial ports the adjustable attenuator in the microwave components being controlled to realize that decay arranges function.
The radar active calibrating device of the numerical control device based on microprocessor ARM of the present invention, comprise microwave components, described microwave components for producing specific gain under the control that is implemented in described digital control module, cooperates to produce specific Radar Cross Section RCS with described dual-mode antenna.
Wherein, described microwave components adopts self calibration and transmits two kinds of mode of operations, and wherein, described self calibration mode of operation is used for described microwave components is carried out self calibration; Described forwarding mode of operation is used for radar system is carried out external calibration.
Wherein, described microwave components comprises signal source, front end microwave switch, low noise amplifier LNA, wave filter, coarse adjustment attenuator, fine setting attenuator, power amplifier, directional coupler, adjustable attenuator, rear end microwave switch and wave detector, wherein,
Described signal source for generation of the reference signal of characteristic frequency certain power, is used for system self-calibration;
Described front end microwave switch is for the signal of the described microwave components input end of gating and described signal source out1 output terminal;
Described low noise amplifier is used for preposition amplification, the sensitivity that improves described microwave components;
Described wave filter is used for the out-of-band undesired signal of filtering;
Described coarse adjustment attenuator and described fine setting attenuator are used for adjusting the gain of described microwave components, make the calibrating device system satisfy the needs of specific RCS value;
Described power amplifier is used for providing the gain of calibrating device;
Described directional coupler, the signal that is used for transmitting described power amplifier are to described emitting antenna, and the coupling unit signal is used for monitoring the output power of described power amplifier for described wave detector simultaneously;
Described adjustable attenuator is for the output power of adjusting coupled signal;
Described rear end microwave switch is for the signal of the described adjustable attenuator output terminal of gating and described signal source out2 output terminal;
Described wave detector is used for the microwave signal of described rear end microwave switch is converted into voltage signal.
Further, can also comprise dual-mode antenna, described dual-mode antenna adopts the pyramidal horn antenna of bistatic, is used for the receiving radar signal and transmits to radar.
Further, can also comprise temperature monitoring module, point to the unit, wherein,
Described temperature monitoring module is for the working temperature of Real-Time Monitoring current system;
Described sensing unit comprises tripod, north arrow and The Cloud Terrace, is used for adjusting orientation and the luffing angle of described dual-mode antenna, makes the dual-mode antenna of the beam position aligning radar of described dual-mode antenna.
The invention has the beneficial effects as follows: according to the numerical control device based on ARM of the present invention and radar active calibrating device, the machine that has realized data acquisition, data storage and data demonstration is integrated, during with the system school of transferring to originally that computing machine just can finish, the functions such as data storage and data demonstration are integrated in calibrating device inside, so both saved cost, reduced again number of peripheral devices, improve the integrated level of system, made things convenient for the user to use in the open air; By adopting the self calibration mode of temperature monitoring module, a signal source, wave detector, front end microwave switch and the combination of rear end microwave switch, eliminated the error that the instability of signal source causes, simultaneously also eliminate the inconsistency of many wave detectors and the error that the environment temperature inconsistency causes, also improved the measuring accuracy of whole system when having improved the self calibration precision; By adopting modular design, adopt serial mode to carry out data transmission between module and the module, adopting joint between module and the module is that the concentric cable of SMA-50J carries out the microwave signal transmission, reduced the interference of equipment room, the hardware that has reduced each intermodule connects, and has improved the maintenanceability of equipment.
Description of drawings
Fig. 1 is the block diagram of system of the embodiment of the invention;
Fig. 2 is the system works synoptic diagram of the embodiment of the invention;
Fig. 3 is the ARM development board functional block diagram of the embodiment of the invention;
Functional schematic when Fig. 4 is the system school of the embodiment of the invention;
Fig. 5 is the self-calibration function synoptic diagram of the embodiment of the invention;
Fig. 6 is the forwarding capability synoptic diagram of the embodiment of the invention;
Fig. 7 is the data display function synoptic diagram of the embodiment of the invention;
Fig. 8 is the data storage function synoptic diagram of the embodiment of the invention.
Embodiment
Below, 1 ~ 8 describe numerical control device and radar active calibrating device based on ARM of the present invention in detail with reference to the accompanying drawings.
The radar active calibrating device that the present invention is based on ARM adopts the ARM control technology, realizes the reliable self calibration under the different temperatures, and possesses the machine and control in real time the function of real-time data acquisition, storage and demonstration.
As shown in Figure 1, the radar active calibrating device that the present invention is based on ARM by digital control module, microwave components, temperature monitoring module, GPS module, point to unit, dual-mode antenna and power supply unit and form.
Wherein digital control module comprises ARM development board and data acquisition circuit, be used for realizing microwave components is controlled to produce specific gain, and obtain corresponding data from microwave components, temperature monitoring module and GPS module, then data are carried out analyzing and processing, storage and demonstration; Microwave components comprises signal source, front end microwave switch, low noise amplifier (LNA), wave filter, coarse adjustment attenuator, fine setting attenuator, power amplifier, directional coupler, adjustable attenuator, rear end microwave switch and wave detector, for producing specific gain under the control that is implemented in digital control module, cooperate to produce specific Radar Cross Section (RCS) with dual-mode antenna; Temperature monitoring module is used for the working temperature of monitoring current system, and the temperature data of current system is provided for digital control module; The GPS module is used to the calibrating device system that current longitude, latitude, time and sea level elevation information is provided; Point to the unit and comprise tripod, The Cloud Terrace, level meter and north arrow, be used for adjusting dual-mode antenna pitching and orientation angles; Dual-mode antenna is used for the receiving radar signal and transmits to radar; Power supply unit is used to the calibrating device system that electric power safeguard is provided.
The present invention works in two kinds of patterns: self calibration mode of operation and forwarding mode of operation.
The self calibration mode of operation is used for realizing the gain self calibration of microwave components, makes the gain of microwave components and gain accuracy satisfy the test needs.Signal source produces the two-way reference signal, the front end microwave switch of leading up to inputs to be transmitted in the path (being the path that LNA, wave filter, coarse adjustment attenuator, fine setting attenuator, power amplifier, directional coupler and adjustable attenuator form), then enters wave detector by rear end microwave switch gating; Another road directly enters wave detector by rear end microwave switch gating.Then two paths of signals is compared, in order to control coarse adjustment attenuator and fine setting attenuator, make the gain of transmitting path remain on setting value.
Transmit the external calibration that mode of operation is used for realizing radar system.Transmit under the mode of operation, the front end microwave switch that digital control module is at first controlled microwave components is thrown to receiving antenna it, then the rear end microwave switch of controlling microwave components is thrown to variable attenuator it, then controlling variable attenuator is in the dynamic range of wave detector its output power levels, like this, microwave components is transmitted to radar after just the radar signal that receives being amplified by certain gain, simultaneously, be stored in the built-in storage chip after the magnitude of voltage sampling of digital control module with the radar signal that forwards, and show in the picture mode.
Transmit mode of operation and generally after the self calibration mode of operation, start, the Radar Cross Section point target of standard can be provided for radar system.Transmitting mode of operation also can separately or prior to the startup of self calibration mode of operation, this situation generally can not guarantee system accuracy, and it is high or use more in short-term apart from self calibration time last time to only limit to accuracy requirement.
The present invention is mainly used in field test, and therefore, setting up of equipment is one of very important work, and the emphasis that sets up work is setting up of antenna.At first according to radar with set up the relative position in place, calculate the line orientation of dual-mode antenna, the tripod of the usefulness that then will erect a television antenna is separated by about 3 meters and is placed, and tripod is adjusted on the sustained height, about about 1.2 meters, can be measured by tape measure; Utilize level meter that tripod is adjusted, make the installed surface of tripod roughly be in horizontality, and tripod is fixed on the ground; The Cloud Terrace is installed on the tripod, and after guaranteeing to install firmly, the bubble that utilizes The Cloud Terrace to carry is adjusted The Cloud Terrace, makes the installed surface of The Cloud Terrace be in horizontality, and fixes; Dual-mode antenna is installed on the The Cloud Terrace, connects as shown in Figure 2 receiving antenna to the receiving end of microwave components, connect emitting antenna to the transmitting terminal of microwave components; According to radar with set up the relative position in place, calculate position angle and the angle of pitch of dual-mode antenna, and respective angles adjusted in orientation and the pitching of dual-mode antenna, so far, just finished setting up of antenna.
For saving cost consideration, generator should be in the unlatching of front about 50 minutes of on-test, then press the power supply output terminal of connection generator shown in Figure 2 to the power input of calibrating device, open calibrating device, start testing software, by rear calibrating device is carried out preheating until self check, preheating time should be more than 30 minutes, when then clicking " during the school " button to the system school, after finishing during the school RCS is set, decay is set, click " self-correcting " button, system just is in the self calibration duty, and system will calibrate transmitting path, after finishing, calibration can provide at status bar " self-correcting is passed through " printed words, click at last " forwarding " button, calibrating device just is in the forwarding duty, at this moment, calibrating device can produce specific RCS reference signal and send to radar, and with the radar signal sampling and the storage that receive, in patterned mode sampled data is shown simultaneously, express intuitively the signal magnitude that receives.
As mentioned above, the radar active calibrating device based on ARM of the embodiment of the invention is comprised of digital control module, microwave components, temperature monitoring module, GPS module, sensing unit, dual-mode antenna and power supply unit, below in conjunction with accompanying drawing the detailed Structure and function of each several part is described further.
1) digital control module
Digital control module comprises ARM development board and data acquisition circuit.
The ARM development board mainly by system to the time, microwave components control, data storage and data show four functions, its functional block diagram as shown in Figure 3, microwave components control comprises that RCS arranges, decay setting, self calibration and forwarding.
After the start, the ARM development board at first carries out self check to the calibrating device system, mainly by saying the word to microwave components, data acquisition circuit and GPS module to confirm whether each module is working properly.After each module is confirmed normal operation, just start automatically to the time operation, if the ARM development board receives GPS information and confirmation and just reads position information and the temporal informations such as longitude, latitude and height by serial ports after effectively from the GPS module, then upgrade current system time, and preserve current GPS information, provide simultaneously the information such as longitude, latitude and sea level elevation of GPS at status bar, and show when school " " printed words, operate when so just having finished the school; If the ARM development board does not receive GPS information or the GPS information that receives is invalid, the ARM development board can read GPS information again, just after still can not obtaining correct GPS information several times, retry enters holding state, and show when school " not " printed words at status bar.Functional schematic as shown in Figure 4 during the school of ARM development board.The ARM development board operates when allowing the user to carry out the system school at any time between at one's leisure.
The ARM development board controls to realize that to the coarse adjustment attenuator in the microwave components and fine setting attenuator RCS arranges function by serial ports.The ARM development board sends instruction by coarse adjustment attenuator and the fine setting attenuator of serial ports in the microwave components, coarse adjustment attenuator and fine setting attenuator receive after the instruction decay arranged and after arranging successfully return message, namely finish RCS function be set.
The ARM development board controls to realize that to the adjustable attenuator in the microwave components decay arranges function by serial ports.The ARM development board sends instruction by serial ports to the adjustable attenuator in the microwave components, and adjustable attenuator arranges and in that successfully rear return message is set, namely finishing decay function is set decay after receiving instruction.
After the ARM development board obtains RCS instruction is set by man-machine interaction, at first obtain current environmental temperature, then search the corresponding coarse adjustment attenuator and the data of finely tuning attenuator of RCS value in the tables of data according to Current Temperatures, and the data that find are write coarse adjustment attenuator and fine setting attenuator; After the ARM development board is obtained from calibration command, at first controls the front end microwave switch and make it point to receiving antenna, control rear end microwave switch makes its directional signal source, obtains current magnitude of voltage (V by data acquisition circuit
1), then to control the front end microwave switch and make its directional signal source, control rear end microwave switch makes it point to adjustable attenuator, obtains current magnitude of voltage (V by data acquisition circuit
2), two magnitudes of voltage that obtain are subtracted each other obtain difference V, i.e. V=V
2-V
1Under Current Temperatures, search the difference V in the tables of data
0, with V and V
0Compare, if comparative result in the error that requires, then self calibration success; If comparative result beyond the error that requires, just the ARM development board is adjusted coarse adjustment attenuator and fine setting attenuator according to the difference that relatively obtains, and then obtains magnitude of voltage V
1With magnitude of voltage V
2Then calculated difference V, and the difference in the tables of data under difference and the Current Temperatures compared, if can satisfy the error needs, then self calibration success is if can not satisfy the error needs, then to continue coarse adjustment attenuator and fine setting attenuator are adjusted, when adjustment still can not be satisfied the error needs more than 10 times, the ARM development board can provide accordingly result according to current difference situation, and provides current magnitude of voltage V
1With magnitude of voltage V
2After self calibration is finished, the ARM development board can with system's Current Temperatures, coarse adjustment attenuator pad value, the pad value, pad value, self-correcting magnitude of voltage, the magnitude of voltage of loop and the information such as magnitude of voltage on straight-through road of adjustable attenuator of fine setting attenuator automatically be saved in the corresponding file.The self-calibration function synoptic diagram of ARM development board as shown in Figure 5.
Transmitting mode of operation is the groundwork pattern of calibrating device, generally is set to transmit mode of operation at the later just calibrating device of self calibration success.The ARM development board obtains to transmit and just controls the front end microwave switch after the instruction and make it point to receiving antenna, and control rear end microwave switch makes it point to adjustable attenuator, and by the attenuation instructions of obtaining adjustable attenuator is operated, and has so just finished and has transmitted operation.It should be noted that transmitting instruction does not operate coarse adjustment attenuator and fine setting attenuator, still uses the self-alignment data in front.Transmit under the mode of operation, data acquisition circuit possesses a comparer, as long as incoming level will be collected above noise level, then sends to ARM by serial ports, finishes data by ARM and shows and data storage function.The forwarding capability synoptic diagram of ARM development board as shown in Figure 6.
The ARM development board will be transmitted the data of obtaining under the mode of operation and export display screen in patterned mode after processing by analysis and show, make data show more intuitively.The longitudinal axis represents the magnitude of voltage size of forward signal, and unit be volt, and transverse axis represents the data amount check that shows, and the data display function synoptic diagram of ARM development board as shown in Figure 7.
The data of ARM development board storage comprise longitude, latitude and the sea level elevation data of obtaining from the GPS module, from RCS the RCS supplemental characteristic that obtains the function is set, from decay the attenuation parameter data of obtaining the function are set, the self calibration data of obtaining from self-checking function and the forwarding data that obtains from forwarding capability, the data storage function synoptic diagram of ARM development board as shown in Figure 8.
Data acquisition circuit adopts single-chip microcomputer, ADC, comparer and the peripheral circuit thereof of technical grade to form, be used for realizing the voltage signal of wave detector and the voltage signal of temperature monitoring module are sampled, and the data transmission after will sampling by serial ports is undertaken operating accordingly after the analyzing and processing by the ARM development board to the ARM development board.
2) microwave components
Microwave components mainly is comprised of signal source, front end microwave switch, low noise amplifier (LNA), wave filter, coarse adjustment attenuator, fine setting attenuator, power amplifier, directional coupler, adjustable attenuator, rear end microwave switch and wave detector.The built-in single chip machine controlling circuit of microwave components, in component internal signal source, the exploitation of front end microwave, coarse adjustment attenuator, fine setting attenuator, adjustable attenuator and rear end microwave switch are controlled and arranged, externally carry out data transmission by serial ports and ARM development board, the benefit of doing like this is to have reduced the interference of hardware and hardware, and has alleviated the work load of ARM development board.The effect of signal source is the reference signal that produces the characteristic frequency certain power, uses for system self-calibration; The effect of front end microwave switch is the signal of gating receiving antenna and signal source; The effect of low noise amplifier is preposition amplification, improves the sensitivity of calibrating device; The effect of wave filter is the out-of-band undesired signal of filtering; The effect of coarse adjustment attenuator and fine setting attenuator is the gain of adjusting calibrating device, makes the calibrating device system satisfy the needs of specific RCS value; The effect of power amplifier provides the gain of calibrating device; The effect of directional coupler be the signal of transmission power amplifier to emitting antenna, the coupling unit signal is used for the output power of monitoring current power amplifier to wave detector simultaneously; The effect of adjustable attenuator is the output power of adjusting coupled signal, makes it to be in the dynamic range of wave detector; The effect of rear end microwave switch is the signal of gating coupled end and signal source; The effect of wave detector is that microwave signal is converted into voltage signal.
3) temperature monitoring module
The core devices of temperature monitoring module is the low-voltage temperature sensor, have low voltage operating (2.7V ~ 5.5V), Voltage-output, ± 0.5 ℃ typical linear, Celsius temperature under directly calibration, less than characteristics such as the quiescent current of 50 μ A and low self-heatings.The voltage of temperature monitoring module output is given the ARM development board by serial ports after being sampled by data acquisition circuit, and then the ARM development board controls to finish corresponding operation according to current temperature data to microwave components.
4) point to the unit
Point to the unit and be comprised of tripod, north arrow and The Cloud Terrace, antenna element couples together by The Cloud Terrace and tripod, and is fixed on the ground.The bearing sense of antenna is finished by north arrow, and pitching leveling indication bubble is arranged on the The Cloud Terrace, is convenient to antenna adjustment level, the regulating device that pitching and orientation are arranged on the The Cloud Terrace, minimum scale are 1 °, and precision is less than ± 0.5 °, for wider directional diagram lobe, precision can meet the demands fully.
5) dual-mode antenna
Dual-mode antenna adopts the pyramid loudspeaker form, mainly is to consider that its lobe can do widelyr, is convenient to signal acquisition, and small volume, is convenient to set up and transport.The caliber size of antenna is 515.27 * 244.88mm
2, length is 476.81mm, BJ14 is adopted in waveguide, is of a size of 165 * 85.5mm
2, gaining is 14.16dB, and 3dB lobe width E face is 23 °, and the H face is 45 °.The feed place adopts the Waveguide coaxial conversion, built-in cylindrical needle, standing-wave ratio (SWR) in Whole frequency band below 1.2.
In sum, according to the digital radar control device based on ARM of the present invention and radar active calibrating device, have following advantage:
1) realized that data acquisition, data are stored and the machine of data demonstration is integrated, during with the system school of transferring to originally that computing machine just can finish, the functions such as data storage and data demonstration are integrated in calibrating device inside, so both saved cost, reduced again number of peripheral devices, improve the integrated level of system, made things convenient for the user to use in the open air;
2) adopt temperature monitoring module, a signal source, the self calibration mode that wave detector, front end microwave switch and rear end microwave switch make up, eliminated the error that the instability of signal source causes, simultaneously also eliminate the inconsistency of many wave detectors and the error that the environment temperature inconsistency causes, also improved the measuring accuracy of whole system when having improved the self calibration precision.
3) adopt modular design, adopt serial mode to carry out data transmission between module and the module, adopting joint between module and the module is that the concentric cable of SMA-50J carries out the microwave signal transmission, reduced the interference of equipment room, the hardware that has reduced each intermodule connects, and has improved the maintenanceability of equipment.
More than be in order to make those of ordinary skills understand the present invention; and the detailed description that the present invention is carried out; but can expect; within not breaking away from the scope that claim of the present invention contains, can also make other changes and modifications, these variations and revising all in protection scope of the present invention.
Claims (10)
1. numerical control device based on microprocessor ARM, it is characterized in that, described numerical control device, the microwave components that is used for the active calibrating device of control radar makes it work in self calibration and two kinds of patterns of forwarding, under described self calibration pattern, temperature data according to temperature monitoring module is adjusted the gain of described microwave components, and compare with the built-in reference signal of described microwave components, to realize the self calibration of described microwave components, under described forward mode, radar signal is received to described microwave components by dual-mode antenna, then is transmitted to radar by described dual-mode antenna after described microwave components amplifies.
2. the numerical control device based on microprocessor ARM as claimed in claim 1 is characterized in that, comprises ARM development board and data acquisition circuit, wherein,
Described ARM development board, be used for obtaining the temperature data of described temperature monitoring module, obtain longitude, latitude, time and the sea level elevation data of GPS module, obtain the output power levels data of described microwave components, and the data analysis that obtains is processed, stored and shows;
Described data acquisition circuit is used for temperature data and the described microwave components output power levels data of described temperature monitoring module are gathered, and sends described ARM development board to by serial ports.
3. the numerical control device based on microprocessor ARM as claimed in claim 2, it is characterized in that, described ARM development board is used for the calibrating device system is carried out self check, by saying the word to microwave components, data acquisition circuit and GPS module to confirm whether each module is working properly.
4. the numerical control device based on microprocessor ARM as claimed in claim 3, it is characterized in that, described ARM development board is further used for by serial ports the coarse adjustment attenuator in the microwave components and fine setting attenuator being controlled to realize that Radar Cross Section RCS arranges function.
5. the numerical control device based on microprocessor ARM as claimed in claim 4 is characterized in that, described ARM development board is further used for by serial ports the adjustable attenuator in the microwave components being controlled to realize that decay arranges function.
6. radar active calibrating device that employing is installed as claimed in claim 1, it is characterized in that, comprise microwave components, described microwave components, for producing specific gain under the control that is implemented in digital control module, cooperate to produce specific RCS with described dual-mode antenna.
7. radar active calibrating device as claimed in claim 6 is characterized in that, described microwave components adopts self calibration and transmits two kinds of mode of operations, and wherein, described self calibration mode of operation is used for described microwave components is carried out self calibration; Described forwarding mode of operation is used for radar system is carried out external calibration.
8. radar active calibrating device as claimed in claim 7 is characterized in that, further comprises dual-mode antenna, and described dual-mode antenna adopts the pyramidal horn antenna of bistatic, is used for the receiving radar signal and transmits to radar.
9. radar active calibrating device as claimed in claim 6, it is characterized in that, described microwave components comprises signal source, front end microwave switch, low noise amplifier LNA, wave filter, coarse adjustment attenuator, fine setting attenuator, power amplifier, directional coupler, adjustable attenuator, rear end microwave switch and wave detector, wherein
Described signal source for generation of the reference signal of characteristic frequency certain power, is used for system self-calibration;
Described front end microwave switch is for the signal of the described microwave components input end of gating and described signal source out1 output terminal;
Described low noise amplifier is used for preposition amplification, the sensitivity that improves described microwave components;
Described wave filter is used for the out-of-band undesired signal of filtering;
Described coarse adjustment attenuator and described fine setting attenuator are used for adjusting the gain of described microwave components, make the calibrating device system satisfy the needs of specific RCS value;
Described power amplifier is used for providing the gain of calibrating device;
Described directional coupler, the signal that is used for transmitting described power amplifier are to emitting antenna, and the coupling unit signal is used for monitoring the output power of described power amplifier for described wave detector simultaneously;
Described adjustable attenuator is for the output power of adjusting coupled signal;
Described rear end microwave switch is for the signal of the described adjustable attenuator output terminal of gating and described signal source out2 output terminal;
Described wave detector is used for the microwave signal of described rear end microwave switch is converted into voltage signal.
10. radar active calibrating device as claimed in claim 6 is characterized in that, further comprise temperature monitoring module, point to the unit, wherein,
Described temperature monitoring module is for the working temperature of Real-Time Monitoring current system;
Described sensing unit comprises tripod, north arrow and The Cloud Terrace, is used for adjusting orientation and the luffing angle of described dual-mode antenna, makes the dual-mode antenna of the beam position aligning radar of described dual-mode antenna.
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| CN103064070B (en) * | 2013-01-07 | 2014-09-24 | 中国工程物理研究院电子工程研究所 | Monitoring structure and method of single pulse radar system self-checking and condition parameter |
| CN103454620B (en) * | 2013-09-23 | 2015-04-15 | 中国科学院空间科学与应用研究中心 | Tracking-type active radar calibrator based on transmitted signal reestablishing system |
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