CN102662163A - 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,, need carry out the real-time and effective calibration to radar system in order when follow-up data is handled, to obtain the absolute value of clutter data.
Generally speaking; Calibration steps is divided into relative calibration and absolute calibration; Relative calibration is also referred to as internal calibration; Adopt respectively the loss or the response function of each parts of measuring system to confirm 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 (like metal ball, corner reflector and Luneberg lens reflector) and active target (like the active calibrating device of radar).Adopt passive calibration target to be called no source calibration as the calibration of measuring basis, adopting active calibration target to be called as the calibration of measuring basis has source calibration.The advantage of no source calibration is simple to operate, and technical being easy to realized, but owing to receive the restriction of volume and weight, passive calibration target often is difficult to realize bigger RCS long-pending (RCS).Compare no source calibration, the advantage that source calibration is arranged is that RCS is adjustable, when realizing bigger RCS, can take into account the volume and weight of calibration target; Calibration accuracy is high, and information recorded is abundant, but active correcting device complex design; Debug difficulties, cost are higher relatively.
Therefore, in the clutter test,, adopt active calibrating mode that radar system is calibrated in order to take into account portable and signal to noise ratio (S/N ratio) demand.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 through devices such as the direct controlled microwave switch of Transistor-Transistor Logic level, coarse adjustment attenuator, fine setting attenuator and adjustable attenuators; And data are gathered and handle; Send computing machine to through serial ports then, accomplish the 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 facility load, power supply burden like this and are connected the failure risk that causes by cable.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 the complicacy of SCM program again, has also increased the maintenance difficulty of calibrating device simultaneously.
Summary of the invention
In order to address the above problem, the present invention provides a kind of numerical control device and radar active calibrating device based on ARM, and 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 two kinds of patterns of self calibration and forwarding; Under said self calibration pattern, according to the temperature data of said temperature monitoring module the gain of said microwave components is adjusted, and compared with the built-in reference signal of said microwave components; To realize the self calibration of said microwave components; Under said forward mode, radar signal is received in the said microwave components by dual-mode antenna, after said microwave components amplifies, is transmitted to radar by said dual-mode antenna then.
Wherein, Said numerical control device comprises ARM development board and data acquisition circuit, wherein, and said ARM development board; Be used to obtain the temperature data of said temperature monitoring module; Obtain longitude, latitude, time and the sea level elevation data of said GPS module, obtain the output power levels data of said microwave components, and the data of obtaining are carried out analyzing and processing, storage and demonstration; Said data acquisition circuit is used for the temperature data and the said microwave components output power levels data of said temperature monitoring module are gathered, and sends said ARM development board to through serial ports.
Wherein, said ARM development board is used for the calibrating device system is carried out self check, through saying the word to microwave components, data acquisition circuit and GPS module to confirm whether each module is in proper working order.
Wherein, said ARM development board is further used for through serial ports coarse adjustment attenuator in the microwave components and fine setting attenuator being controlled to realize that RCS is provided with function.
In addition, said ARM development board is further used for through serial ports the adjustable attenuator in the microwave components being controlled to realize that decay is provided with function.
The radar active calibrating device of the numerical control device based on microprocessor ARM of the present invention; Comprise microwave components; Said microwave components is used to be implemented in the control specific gain of generation down of said digital control module, cooperates with said dual-mode antenna to produce the long-pending RCS of specific RCS.
Wherein, said microwave components adopts self calibration and transmits two kinds of mode of operations, and wherein, said self calibration mode of operation is used for said microwave components is carried out self calibration; Said forwarding mode of operation is used for radar system is carried out external calibration.
Wherein, said 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,
Said signal source is used to produce the reference signal of CF certain power, uses for system self-calibration;
Said front end microwave switch is used for the signal of said microwave components input end of gating and said signal source out1 output terminal;
Said low noise amplifier is used for preposition amplification, improves the sensitivity of said microwave components;
Said wave filter is used for the out-of-band undesired signal of filtering;
Said coarse adjustment attenuator and said fine setting attenuator are used to adjust the gain of said microwave components, make the calibrating device system satisfy the needs of specific RCS value;
Said power amplifier is used to provide the gain of calibrating device;
Said directional coupler, the signal that is used to transmit said power amplifier are to said emitting antenna, and the coupling unit signal is used to monitor the output power of said power amplifier for said wave detector simultaneously;
Said adjustable attenuator is used to adjust the output power of coupled signal;
Said rear end microwave switch is used for the signal of said adjustable attenuator output terminal of gating and said signal source out2 output terminal;
Said wave detector is used for the microwave signal of said rear end microwave switch is converted into voltage signal.
Further, can also comprise dual-mode antenna, said 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 the monitoring temperature module, point to the unit, wherein,
Said monitoring temperature module is used for monitoring in real time the working temperature of current system;
Said sensing unit comprises tripod, north arrow and The Cloud Terrace, is used to adjust the orientation and the luffing angle of said dual-mode antenna, makes the dual-mode antenna of the beam position aligning radar of said dual-mode antenna.
The invention has the beneficial effects as follows: according to numerical control device and radar active calibrating device based on ARM of the present invention; This machine of having realized data acquisition, data storage and data presentation is integrated; During with the system school of transferring to originally that computing machine could accomplish, function such as data storage and data presentation is integrated in calibrating device inside, so both practiced thrift cost, reduced number of peripheral devices again; Improve the integrated level of system, made things convenient for the user to use in the open air; Through adopting the self calibration mode of monitoring temperature 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 total system when having improved the self calibration precision; Through 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 presentation functional schematic of the embodiment of the invention;
Fig. 8 is the data storage function synoptic diagram of the embodiment of the invention.
Embodiment
Below, describe numerical control device and radar active calibrating device based on ARM of the present invention in detail with reference to accompanying drawing 1 ~ 8.
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 this machine and control the function of real-time data acquisition, storage and demonstration in real time.
As shown in Figure 1, the radar active calibrating device that the present invention is based on ARM is made up of digital control module, microwave components, temperature monitoring module, GPS module, sensing unit, dual-mode antenna and power supply unit.
Wherein digital control module comprises ARM development board and data acquisition circuit; Be used to realize 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; Be used to be implemented in the control specific gain of generation down of digital control module, cooperate with dual-mode antenna to produce specific RCS long-pending (RCS); The temperature monitoring module is used to monitor the working temperature of 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 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 to adjust 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 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 to realize 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 are formed), gets into wave detector through rear end microwave switch gating then; Another road directly gets into wave detector through rear end microwave switch gating.Then two paths of signals is compared,, make the gain of transmitting path remain on setting value in order to control coarse adjustment attenuator and fine setting attenuator.
Transmit the external calibration that mode of operation is used to realize radar system.Transmit under the mode of operation; The digital control module at first front end microwave switch of controlled microwave assembly is thrown to receiving antenna it; The rear end microwave switch of controlled microwave assembly is thrown to variable attenuator it then, then controls variable attenuator its output power levels is in the dynamic range of wave detector, 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 with the picture mode.
Transmit mode of operation and generally after the self calibration mode of operation, start, the long-pending point target of RCS 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 will erect a television antenna then 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, and connection receiving antenna as shown in Figure 2 connects the transmitting terminal of emitting antenna to microwave components to the receiving end of microwave components; According to radar with set up the relative position in place, calculate the position angle and the angle of pitch of dual-mode antenna, and respective angles adjusted in the orientation and the pitching of dual-mode antenna, so far, just accomplished setting up of antenna.
For practicing thrift cost consideration, generator should be pressed the power input of the power supply output terminal of connection generator shown in Figure 2 to calibrating device then in the unlatching of preceding about 50 minutes of on-test; Open calibrating device, start testing software, treat that self check is through then carrying out preheating to calibrating device; Should when clicking " during the school " button to the system school then, be provided with RCS after accomplishing during the school, decay is set preheating time more than 30 minutes; Click " self-correcting " button, system just is in the self calibration duty, and system will calibrate transmitting path; Can provide " self-correcting is passed through " printed words after calibration is accomplished at status bar, click " forwarding " button at last, 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; With patterned mode sampled data is shown simultaneously, express the signal magnitude that receives intuitively.
As stated; The radar active calibrating device based on ARM of the embodiment of the invention is made up 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 detailed formation of each several part and function is further specified.
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 four functions of data presentation, its functional block diagram is as shown in Figure 3, microwave components control comprises that RCS is provided with, 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 through saying the word to microwave components, data acquisition circuit and GPS module to confirm whether each module is in proper working order.Treat each module confirm just to start after operate as normal automatically to the time operation; If the ARM development board receives GPS information and confirmation and just from the GPS module, reads position information and temporal informations such as longitude, latitude and height through serial ports after effectively; Upgrade current system time then, and preserve current GPS information, provide the information such as longitude, latitude and sea level elevation of GPS simultaneously at status bar; And show when school " " printed words, operate when so just having accomplished 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 treat to get into holding state after retry still can not obtain correct GPS information several times, and show when school " not " printed words at status bar.Functional schematic is as shown in Figure 4 during the school of ARM development board.When allowing the user to carry out the system school at any time between at one's leisure, operates the ARM development board.
The ARM development board is controlled to realize that RCS is provided with function coarse adjustment attenuator in the microwave components and fine setting attenuator through serial ports.The ARM development board sends with the fine setting attenuator through the coarse adjustment attenuator of serial ports in microwave components and instructs, and the coarse adjustment attenuator is provided with and in that successfully back return message is set, promptly accomplishes RCS function is set decay after receiving instruction with the fine setting attenuator.
The ARM development board is controlled to realize that decay is provided with function the adjustable attenuator in the microwave components through serial ports.The ARM development board sends instruction through the adjustable attenuator of serial ports in microwave components, and adjustable attenuator reception instruction back is provided with decay and successfully back return message is being set, and promptly accomplishing decays is provided with function.
After the ARM development board obtains RCS instruction is set through man-machine interaction; At first obtain current environmental temperature; 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 then, 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), to control the front end microwave switch then 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
2, calculated difference V then, 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 accomplished, the ARM development board can with system's Current Temperatures, coarse adjustment attenuator pad value, the pad value of fine setting attenuator, 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 be saved in automatically in the corresponding file.The self-calibration function synoptic diagram of ARM development board is 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 successfully later just calibrating device of self calibration.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 accomplished 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, sends to ARM through serial ports then, accomplishes data presentation and data storage function by ARM.The forwarding capability synoptic diagram of ARM development board is as shown in Figure 6.
The ARM development board will be transmitted the data of obtaining under the mode of operation and after analyzing and processing, export display screen to patterned mode and show that it is more directly perceived that data presentation is got.The longitudinal axis is represented the magnitude of voltage size of forward signal, and unit is a volt, and transverse axis is represented the data presented number, and the data presentation functional schematic of ARM development board is as shown in Figure 7.
The data of ARM development board storage comprise longitude, latitude and the sea level elevation data of from the GPS module, obtaining; From RCS the RCS supplemental characteristic that obtains the function is set; From decay the attenuation parameter data of obtaining the function are set; Self calibration data of from the self-correcting function, obtaining and the forwarding data of obtaining from forwarding capability, the data storage function synoptic diagram of ARM development board is 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 to realize the voltage signal of wave detector and the voltage signal of temperature monitoring module are sampled; And the data transmission after will sampling through serial ports gives the ARM development board, undertaken operating accordingly after the analyzing and processing by the ARM development board.
2) microwave components
Microwave components mainly is made up 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 be provided with; Externally carry out data transmission through 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 CF 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 coarse adjustment attenuator is the gain of adjustment calibrating device with the effect of fine setting attenuator, 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 is that the signal of transmission power amplifier is given emitting antenna, and the coupling unit signal is used to monitor the output power of current power amplifier to wave detector simultaneously; The effect of adjustable attenuator is the output power of adjustment 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 ARM development board by data acquisition circuit sampling back through serial ports, and the ARM development board is controlled to accomplish corresponding operation microwave components according to current temperature data then.
4) point to the unit
Point to the unit and be made up of tripod, north arrow and The Cloud Terrace, antenna element couples together through The Cloud Terrace and tripod, and is fixed on the ground.The bearing sense of antenna is accomplished 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 the directional diagram lobe of broad, precision can meet the demands fully.
5) dual-mode antenna
Dual-mode antenna adopts the pyramid loudspeaker form, mainly be consider its lobe can do broad, be convenient to signal acquisition, and volume is less, be 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 the full range band below 1.2.
In sum, according to digital radar control device and radar active calibrating device based on ARM of the present invention, have following advantage:
1) realized that this machine of data acquisition, data storage and data presentation is integrated; During with the system school of transferring to originally that computing machine could accomplish, function such as data storage and data presentation is integrated in calibrating device inside; So both practiced thrift cost; Reduce number of peripheral devices again, improved the integrated level of system, made things convenient for the user to use in the open air;
2) adopt monitoring temperature 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 total 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 to detailed description that the present invention carried out; But can expect; In the scope that does not break away from claim of the present invention and contained, can also make other variation and modification, these variations and revising all in protection scope of the present invention.
Claims (10)
1. the numerical control device based on microprocessor ARM is characterized in that, said numerical control device; The microwave components that is used for the active calibrating device of control radar makes it work in two kinds of patterns of self calibration and forwarding; Under said self calibration pattern, according to the temperature data of said temperature monitoring module the gain of said microwave components is adjusted, and compared with the built-in reference signal of said microwave components; To realize the self calibration of said microwave components; Under said forward mode, radar signal is received in the said microwave components by dual-mode antenna, after said microwave components amplifies, is transmitted to radar by said dual-mode antenna then.
2. the numerical control device based on ARM as claimed in claim 1 is characterized in that, comprises ARM development board and data acquisition circuit, wherein,
Said ARM development board; Be used to obtain the temperature data of said temperature monitoring module; Obtain longitude, latitude, time and the sea level elevation data of said GPS module, obtain the output power levels data of said microwave components, and the data of obtaining are carried out analyzing and processing, storage and demonstration;
Said data acquisition circuit is used for the temperature data and the said microwave components output power levels data of said temperature monitoring module are gathered, and sends said ARM development board to through serial ports.
3. the numerical control device based on ARM as claimed in claim 2; It is characterized in that; Said ARM development board is used for the calibrating device system is carried out self check, through saying the word to microwave components, data acquisition circuit and GPS module to confirm whether each module is in proper working order.
4. the numerical control device based on ARM as claimed in claim 3; It is characterized in that; Said ARM development board is further used for through serial ports coarse adjustment attenuator in the microwave components and fine setting attenuator being controlled to realize that the long-pending RCS of RCS is provided with function.
5. the numerical control device based on ARM as claimed in claim 4 is characterized in that, said ARM development board is further used for through serial ports the adjustable attenuator in the microwave components being controlled to realize that decay is provided with function.
6. radar active calibrating device that employing is installed according to claim 1; It is characterized in that, comprise microwave components, said microwave components; Be used to be implemented in the control specific gain of generation down of said digital control module, cooperate to produce specific RCS with said dual-mode antenna.
7. radar active calibrating device as claimed in claim 6 is characterized in that, said microwave components adopts self calibration and transmits two kinds of mode of operations, and wherein, said self calibration mode of operation is used for said microwave components is carried out self calibration; Said 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 said 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; Said 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
Said signal source is used to produce the reference signal of CF certain power, uses for system self-calibration;
Said front end microwave switch is used for the signal of said microwave components input end of gating and said signal source out1 output terminal;
Said low noise amplifier is used for preposition amplification, improves the sensitivity of said microwave components;
Said wave filter is used for the out-of-band undesired signal of filtering;
Said coarse adjustment attenuator and said fine setting attenuator are used to adjust the gain of said microwave components, make the calibrating device system satisfy the needs of specific RCS value;
Said power amplifier is used to provide the gain of calibrating device;
Said directional coupler, the signal that is used to transmit said power amplifier are to said emitting antenna, and the coupling unit signal is used to monitor the output power of said power amplifier for said wave detector simultaneously;
Said adjustable attenuator is used to adjust the output power of coupled signal;
Said rear end microwave switch is used for the signal of said adjustable attenuator output terminal of gating and said signal source out2 output terminal;
Said wave detector is used for the microwave signal of said rear end microwave switch is converted into voltage signal.
10. radar active calibrating device as claimed in claim 6 is characterized in that, further comprises the monitoring temperature module, points to the unit, wherein,
Said monitoring temperature module is used for monitoring in real time the working temperature of current system;
Said sensing unit comprises tripod, north arrow and The Cloud Terrace, is used to adjust the orientation and the luffing angle of said dual-mode antenna, makes the dual-mode antenna of the beam position aligning radar of said dual-mode antenna.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109542910A (en) * | 2018-12-03 | 2019-03-29 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of magnanimity sea clutter data classification storage method |
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| CN111722193A (en) * | 2020-06-12 | 2020-09-29 | 零八一电子集团有限公司 | Doppler search radar state stability intelligent detection system |
| CN112068057A (en) * | 2020-08-31 | 2020-12-11 | 中电科仪器仪表有限公司 | Self-adaptive calibration compensation method for accurate power display |
| CN112098731A (en) * | 2020-09-16 | 2020-12-18 | 江苏方天电力技术有限公司 | Electromagnetic field probe with autonomous calibration function and calibration method thereof |
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| CN103064070A (en) * | 2013-01-07 | 2013-04-24 | 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 |
| CN103454620A (en) * | 2013-09-23 | 2013-12-18 | 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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| CN105161851A (en) * | 2015-08-18 | 2015-12-16 | 沈阳航空航天大学 | Manual antenna alignment apparatus and method applied to radar simulator calibration process |
| CN108008363A (en) * | 2016-10-27 | 2018-05-08 | 北京遥感设备研究所 | A kind of calibration system for quantitative measurment radar |
| CN108008363B (en) * | 2016-10-27 | 2021-05-07 | 北京遥感设备研究所 | Calibration system for quantitative measurement radar |
| CN110869794A (en) * | 2017-04-21 | 2020-03-06 | 华为技术有限公司 | Leakage signal cancellation |
| US11476891B2 (en) | 2017-04-21 | 2022-10-18 | Futurewei Technologies, Inc. | Frequency nonlinearity calibration in frequency-modulated continuous wave radar |
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| CN109088675B (en) * | 2017-06-13 | 2022-02-08 | 北京普源精电科技有限公司 | Channel calibration method and device for radio frequency signal source |
| CN109188380A (en) * | 2018-09-12 | 2019-01-11 | 北京机械设备研究所 | A kind of key index test macro and method for low slow small detection radar |
| CN109188380B (en) * | 2018-09-12 | 2021-11-02 | 北京机械设备研究所 | Key index testing system and method for low-slow small detection radar |
| CN109270506A (en) * | 2018-09-29 | 2019-01-25 | 北京望远四象科技有限公司 | The test macro and test method of radar performance figure |
| CN109347509A (en) * | 2018-11-01 | 2019-02-15 | 广州杰赛科技股份有限公司 | A kind of gain compensating method of active antenna, device and active antenna |
| CN109542910A (en) * | 2018-12-03 | 2019-03-29 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of magnanimity sea clutter data classification storage method |
| CN109542910B (en) * | 2018-12-03 | 2022-10-28 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Mass sea clutter data classification storage method |
| CN111722193A (en) * | 2020-06-12 | 2020-09-29 | 零八一电子集团有限公司 | Doppler search radar state stability intelligent detection system |
| CN112068057A (en) * | 2020-08-31 | 2020-12-11 | 中电科仪器仪表有限公司 | Self-adaptive calibration compensation method for accurate power display |
| CN112068057B (en) * | 2020-08-31 | 2023-02-17 | 中电科思仪科技股份有限公司 | Self-adaptive calibration compensation method for accurate power display |
| CN112098731A (en) * | 2020-09-16 | 2020-12-18 | 江苏方天电力技术有限公司 | Electromagnetic field probe with autonomous calibration function and calibration method thereof |
| CN113890639A (en) * | 2021-11-11 | 2022-01-04 | 中国电子科技集团公司第二十九研究所 | Device and method for detecting power of radiation unit |
| CN113890639B (en) * | 2021-11-11 | 2023-03-14 | 中国电子科技集团公司第二十九研究所 | Device and method for detecting power of radiation unit |
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