CN113466807B - Radar critical intercepted distance test system - Google Patents
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- CN113466807B CN113466807B CN202110730550.9A CN202110730550A CN113466807B CN 113466807 B CN113466807 B CN 113466807B CN 202110730550 A CN202110730550 A CN 202110730550A CN 113466807 B CN113466807 B CN 113466807B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
Abstract
The radar critical intercepted distance testing system disclosed by the invention is convenient to operate, low in test cost and comprehensive in test data. The invention is realized by the following technical scheme: the radar terminal responds to the radar control instruction and transmits a radar signal, the radar signal is divided into two paths by the power divider, one path of radar transmission signal is transmitted to the radar target simulator, a radar echo signal is generated and transmitted to the radar terminal for target parameter calculation, and the detection result is transmitted to the radar display control computer in real time; the other path of radar emission signal is sent to a numerical control attenuator to carry out attenuation adjustment on the received radar emission signal, the attenuated radar intercepted signal is sent to a reconnaissance receiver through a radio frequency cable, the intercepted parameter measurement is carried out on the received radar intercepted signal, the intercepted result is transmitted to a reconnaissance display control computer in real time, the position of a radar target at a critical moment is searched, the distance between the radar terminal machine and the radar target at the critical moment is calculated according to the position of the radar terminal machine, and the radar critical intercepted distance is obtained.
Description
Technical Field
The invention relates to a test system for evaluating radar critical intercepted distance of radar equipment with low interception probability performance.
Background
Radar generally employs low sidelobe antennas, irregular antenna scan patterns, accurate power control, extremely high radar receiver sensitivity, high processing gain, coherent detection to achieve low interception, a type of radar known as low probability of interception (Low Probability of Intercept, LPI) radar. The LPI radar signal is to be detected by the scout receiver, requiring a certain output signal to noise ratio. Because most radars use radio frequency pulse signals, under the general condition, a reconnaissance receiver is in a non-matching receiving and processing state for the signals, envelope detection and threshold detection can only be carried out on all signals in instantaneous receiving bandwidth, when the envelope signals exceed a given threshold, the signals are judged to exist, and corresponding signal parameter measurement is carried out. The front end of some reconnaissance systems has the capability of detecting and measuring multiple signals at the same time, and the multiple signals in the coincidence window can be measured and resolved accurately at the same time. Some reconnaissance systems have no capability of detecting and measuring multiple signals at the same time, and when multiple signals exist in the coincidence window, the signals are lost or measured in error. The superposition probability of each radar signal is not only influenced by the number of radiation sources and the work ratio in the signal environment, but also influenced by the pulse width of the radar signal, the larger the pulse width is, the larger the superposition probability is, and the larger the number of the radiation sources in the environment is, the larger the work ratio is, so that the superposition probability is also the larger. Coincidence necessarily occurs if there is a continuous wave radar in the band. Receivers employing conventional reconnaissance techniques are not able to effectively intercept and identify the LPI radar. The complex waveforms employed by LPI radar will result in the radar warning receiver and conventional electronic support system detecting LPI radar only in very close range. At this time, the interception distance of the radar alarm receiver and the conventional electronic support system is much smaller than the detection distance of the LPI radar.
When the maximum detection distance of the radar is larger than the maximum interception distance of the reconnaissance receiver, the radar has certain LPI performance. Thus, whether or not a radar has LPI characteristics is related to the type of reconnaissance receiver, that is, a radar having LPI performance in the past is not necessarily an LPI radar for a new generation of reconnaissance receiver, but to combat the new generation of reconnaissance receiver, the radar requires more new theories and new technologies to improve its LPI performance. The radar adopts a large-time wide bandwidth product signal to enable the bandwidth of the reconnaissance receiver to be mismatched with the bandwidth, so that the sensitivity of the reconnaissance receiver is reduced equivalently, the bandwidth of the radar receiver can be matched with the bandwidth of a transmitting signal, and the maximum signal-to-noise ratio is output, so that the LPI performance of the radar is improved. Meanwhile, accurate power control is a main feature of the LPI radar. Power control means that after a radar targets, the transmitting power of the radar is reduced, so that the receiving signal level of the radar receiver is always kept to the minimum. As the distance between the radar carrier and the target carrier decreases, the power required by the radar to maintain target detection decreases, and the power required by a scout receiver on the target carrier to intercept radar signals also decreases. At a certain relative distance R of the radar and the scout receiver, the minimum transmit power required by the radar to detect the scout receiver is equal to the minimum transmit power required by the scout receiver to intercept the radar, the corresponding minimum transmit power being referred to as the critical power. The corresponding distance R is called the critical distance, i.e. the radar critical intercepted distance. Within the critical intercepted distance of the radar, the radar can find the target, but is not intercepted by the reconnaissance receiver.
The radar critical intercepted distance is the maximum detection distance of the radar in a low interception state. As an index for measuring the detection distance of the radar in the non-intercepted state, the larger the critical intercepted distance of the radar is, the better the radar is. The formula for analyzing the radar critical intercepted distance can obtain that the radar critical intercepted distance is related to three parameters of radar reflection sectional area, reconnaissance receiver sensitivity and radar receiver sensitivity, wherein the radar reflection sectional area is a parameter related to the scattering performance of the target carrier. From both radar and scout countermeasures, increasing the radar threshold intercepted distance may be considered in two ways:
(1) The method for increasing the sensitivity of the radar receiver mainly comprises the following steps of firstly, reducing the noise coefficient of the radar receiver as much as possible; secondly, the radar receiver selects the optimal bandwidth; on the premise of meeting the system performance requirement, the recognition factor is reduced as much as possible, and the common method is pulse accumulation.
(2) The sensitivity of the reconnaissance receiver is reduced, and two measures can be realized, namely, the radar adopts a large-time wide bandwidth product signal, so that the reconnaissance receiver can be forced to increase the channel bandwidth, and the sensitivity of the reconnaissance receiver is reduced equivalently; and secondly, the target carrier is interfered, and an interference signal enters the reconnaissance receiver, so that the signal-to-noise ratio of a received signal can be reduced, a useful signal is submerged below the noise, and the sensitivity of the reconnaissance receiver can be equivalently reduced.
Test studies of the critical intercepted distance of radar are necessary. However, the critical intercepted distance is difficult to test directly when the radar is used against a specific reconnaissance system. The research on the critical intercepted distance of the radar in China is mainly focused on theoretical analysis and simulation verification by taking the critical intercepted distance as a measurement index of the LPI performance of the radar, and a test method for effectively testing the critical intercepted distance of the radar is an outfield test flight method, wherein the outfield test flight method is required to be provided with a radar carrier, a target machine and a reconnaissance carrier, complex route design is required, multiple repeated tests are also required to be carried out in order to ensure the accuracy of test results, and the test method is complex and has higher test cost.
Disclosure of Invention
The invention aims to solve the problems of complex and high test cost of the conventional radar critical intercepted distance test method, and provides a radar critical intercepted distance test system which is convenient to operate, low in test cost and comprehensive in data test.
The above object of the present invention can be achieved by the following technical solutions: a radar critical intercepted distance testing system comprising: the system is characterized in that the system comprises a radar display control computer connected with a radar terminal through a network cable, a reconnaissance display control computer connected with a reconnaissance receiver through the network cable, a comprehensive control computer connected with a radar target simulator and a digital control attenuator through the network cable, a digital control attenuator connected with a power divider and the reconnaissance receiver through a radio frequency cable, and a time system device connected with the radar target simulator and the radar terminal through the radio frequency cable and providing time unified signals for the radar terminal and the reconnaissance receiver through a low frequency cable, wherein the system comprises the following components: in the radar critical intercepted distance test, a radar display control computer sends a radar control instruction to a radar terminal through a network cable, the radar terminal responds to the radar control instruction and sends radar signals, the radar signals are divided into two paths through a power divider, one path of radar emission signals is sent to a radar target simulator, the radar target simulator carries out attenuation and delay operation on the received radar emission signals according to target tracks sent by the built-in wanted editing software of the comprehensive control computer, radar echo signals are generated and sent to the radar terminal, the radar terminal carries out target parameter calculation on the received radar echo signals and sends detection results to the radar display control computer in real time, and the radar terminal simultaneously carries out real-time adjustment on the power of the radar emission signals according to the radar emission power control strategy; the other path of radar transmitting signals are sent to a numerical control attenuator, the numerical control attenuator responds to path attenuation values issued by attenuation calculation software arranged in a comprehensive control computer, attenuation adjustment is carried out on the received radar transmitting signals, path attenuation of radar signals in the process of propagation is simulated, the attenuated radar intercepted signals are sent to a reconnaissance receiver through a radio frequency cable, the reconnaissance receiver responds to reconnaissance control instructions, interception parameter measurement is carried out on the received radar intercepted signals, and the measured interception results are transmitted to a reconnaissance display control computer in real time; after the execution is supposed to be completed, a critical moment is found, the position of a radar target at the critical moment is found, and the reconnaissance display control computer calculates the distance between the radar terminal and the radar target at the critical moment according to the position of the radar terminal to obtain the critical intercepted distance of the radar.
Compared with the prior art, the invention has the following beneficial effects:
the operation is convenient. Firstly, building a test environment, and then carrying out parameter configuration on a radar terminal, a radar target simulator, a numerical control attenuator and a reconnaissance receiver through a radar display control computer, a comprehensive control computer and a reconnaissance display control computer; then measuring the detection state of the radar end machine in the wanted scene to the analog radar target through the radar end machine and the radar target simulator, and measuring the interception state of the reconnaissance receiver in the wanted scene to the radar end machine through the radar end machine, the numerical control attenuator and the reconnaissance receiver; finally, when the radar end machine can finish detection tasks on the simulated radar target and the reconnaissance receiver can not intercept the radar end machine, the distance between the radar end machine and the radar target simulator at the moment is the critical intercepted distance of the radar. Compared with the external field test flight method, the test method of the invention has convenient operation and strong feasibility.
The test cost is low. The invention adopts a radar critical intercepted distance test system consisting of a radar display control computer, a comprehensive control computer, a reconnaissance display control computer, a radar terminal, a radar target simulator, a numerical control attenuator and a reconnaissance receiver, and performs radar critical intercepted distance test under a laboratory desktop scene. The test cost is only the software development cost of the wanted editing software and the attenuation calculation software which are arranged in the comprehensive control computer, and the use cost of the equipment such as a radar terminal, a radar target simulator, a reconnaissance receiver, time system equipment and the like. The outfield test flight method is huge in cost, and needs to be completed in cooperation with a plurality of units and departments, and further needs to repeat the flight test for a plurality of times. Compared with the field test flight method, the test method has low test cost and can save manpower, material resources and financial resources in a large amount.
And the data test is comprehensive. The invention adopts the radar display control computer to send the radar control instruction to the radar terminal machine through the network cable, the radar terminal machine responds to the radar control instruction and transmits radar signals, the radar target simulator carries out attenuation and delay operation on the received radar transmitting signals according to target tracks issued by the desired editing software arranged in the comprehensive control computer, and the numerical control attenuator responds to path attenuation values issued by the attenuation calculation software arranged in the comprehensive control computer and carries out attenuation adjustment on the received radar transmitting signals. Parameter setting is carried out on the radar terminal, the radar target simulator and the digital attenuator, so that different working modes and working parameters of the radar can be traversed, and comprehensive test data of the radar system can be obtained. Compared with the method for calculating the critical intercepted distance of the radar in a simulation way, the method has the advantages that the test object of the critical intercepted distance of the radar is a real radar terminal, the test scene is more real, and the measurement data is reliable.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic block diagram of a radar critical intercepted distance testing system of the present invention.
Fig. 2 is a test flow chart of the present invention.
Detailed Description
See fig. 1. In a preferred embodiment described below, a radar critical intercepted distance testing system includes: the system comprises a radar display control computer connected with a radar terminal through a network cable, a reconnaissance display control computer connected with a reconnaissance receiver through a network cable, a comprehensive control computer connected with a radar target simulator and a digital control attenuator through a network cable, a digital control attenuator connected with a power divider and the reconnaissance receiver through a radio frequency cable, and a time system device connected with the radar target simulator of the power divider and the radar terminal through a radio frequency cable and providing time unified signals for the radar terminal and the reconnaissance receiver through a low frequency cable. In radar critical intercepted distance testing: the radar display control computer sends a radar control command to the radar terminal through a network cable, the radar terminal responds to the radar control command and sends a radar signal, the radar signal is divided into two paths through the power divider, one path of radar emission signal is sent to the radar target simulator, the radar target simulator carries out attenuation and time delay operation on the received radar emission signal according to a target track sent by the desired editing software arranged in the comprehensive control computer, a radar echo signal is generated and sent to the radar terminal, the radar terminal carries out target parameter calculation on the received radar echo signal and sends a detection result to the radar display control computer in real time, and the radar terminal simultaneously carries out real-time adjustment on the power of the radar emission signal according to the radar emission power control strategy; the other path of radar transmitting signal is sent to a numerical control attenuator, the numerical control attenuator responds to a path attenuation value issued by attenuation calculation software arranged in the comprehensive control computer, attenuation adjustment is carried out on the received radar transmitting signal, path attenuation of the radar signal in the process of propagation is simulated, the attenuated radar intercepted signal is sent to a reconnaissance receiver through a radio frequency cable, the reconnaissance receiver responds to a reconnaissance control instruction, interception parameter measurement is carried out on the received radar intercepted signal, and an interception result obtained through measurement is transmitted to a reconnaissance display control computer in real time. After the execution is supposed to be completed, a critical moment is found, the position of a radar target at the critical moment is found, and the reconnaissance display control computer calculates the distance between the radar terminal and the radar target at the critical moment according to the position of the radar terminal to obtain the critical intercepted distance of the radar.
Before testing, a testing environment is set up, equipment working parameters are configured, and an editing scene is designed.
The construction of the test environment comprises the following steps: the radar display control computer is connected with the radar terminal machine through a network cable and is used for issuing radar control instructions and receiving radar detection result information; the radar terminal machine is connected with the radar target simulator and the digital control attenuator through the radio frequency cable and the power divider respectively and is used for transmitting radar transmitting signals; the radar target simulator is connected with the radar terminal machine through a radio frequency cable and is used for transmitting radar echo signals; the digital control attenuator is connected with the reconnaissance receiver through a radio frequency cable and is used for transmitting the intercepted signals of the radar;
the reconnaissance display control computer is connected with the reconnaissance receiver through a network cable and is used for issuing reconnaissance control instructions and receiving the intercepted result information of the radar; the comprehensive control computer is connected with the radar target simulator through a network cable and is used for transmitting radar target tracks; the comprehensive control computer is connected with the numerical control attenuator through a network cable and is used for transmitting path attenuation values; the time system equipment is connected with the radar terminal and the reconnaissance receiver through the low-frequency cable and is used for transmitting time unification signals.
The configuration equipment working parameters comprise: the radar display control computer is used for configuring working parameters of a radar end machine, wherein the working parameters of the Lei Daduan machine comprise radar signal frequency, radar signal bandwidth, radar signal waveform and radar signal power parameters; the working parameters of the reconnaissance receiver are configured through the reconnaissance display control computer, and the working parameters of the reconnaissance receiver comprise signal frequency bands and signal threshold parameters.
Editing a scene is intended to include: the radar end machine comprises a radar end machine initial position, an end position, a speed setting, a radar target initial position, an end position, a speed setting and a weather setting, wherein the radar end machine and the radar target initial and end positions comprise longitude, latitude and altitude, the radar end machine and the radar target move in opposite directions, and the weather information comprises sunny days, rainy days and foggy days. The wanted editing software calculates the relative distance and relative speed between the radar target and the radar terminal in real time, and transmits the relative distance and the relative speed together with the set radar reflection sectional area to the radar target simulator. The initial distance between the radar end machine and the radar target under the wanted edit is larger than the maximum detection distance of the radar to the target, and is also larger than the maximum interception distance of the reconnaissance receiver to the radar end machine.
After the establishment of the test environment, the configuration of the equipment working parameters and the editing of the scene design are completed, the test is carried out according to the following steps:
and the comprehensive control computer issues the target track and starts the test. The radar display control computer sends a radar control command to the radar terminal through a network cable, the radar terminal responds to the radar control command and sends a radar signal, the radar signal is divided into two paths through the power divider, one path of radar emission signal is sent to the radar target simulator, the radar target simulator carries out attenuation and time delay operation on the received radar emission signal according to a target track sent by the desired editing software arranged in the comprehensive control computer, a radar echo signal is generated and sent to the radar terminal, the radar terminal carries out target parameter calculation on the received radar echo signal and sends a detection result to the radar display control computer in real time, and the radar terminal simultaneously carries out real-time adjustment on the power of the radar emission signal according to the radar emission power control strategy; the other path of radar transmitting signal is sent to a numerical control attenuator, the numerical control attenuator responds to a path attenuation value issued by attenuation calculation software arranged in the comprehensive control computer, attenuation adjustment is carried out on the received radar transmitting signal, path attenuation of the radar signal in the process of propagation is simulated, the attenuated radar intercepted signal is sent to a reconnaissance receiver through a radio frequency cable, the reconnaissance receiver responds to a reconnaissance control instruction, interception parameter measurement is carried out on the received radar intercepted signal, and an interception result obtained through measurement is transmitted to a reconnaissance display control computer in real time. After the scene is supposed to be executed, the comprehensive control computer performs post analysis on detection data of the radar terminal and interception data of the reconnaissance receiver to obtain the currently supposed radar critical intercepted distance.
In the test process, the distance between the simulated radar target and the radar terminal machine is gradually reduced, radar emission signals are also gradually reduced according to a radar power control strategy, attenuation calculation software arranged in the computer is comprehensively controlled, and the path attenuation value of the control numerical control attenuator is synchronously reduced. The whole planning process formulated by planning editing software can be divided into four stages, wherein in the first stage, the Lei Daduan machine cannot finish detection of radar targets, and a reconnaissance receiver cannot intercept radar signals; in the second stage, the radar end machine cannot finish detection of radar targets, and the reconnaissance receiver starts to intercept radar signals; in the third stage, lei Daduan can finish the detection of radar targets, and the reconnaissance receiver can intercept radar signals; in the fourth stage, lei Daduan can complete the detection of radar targets while the scout receiver cannot intercept radar signals.
In the test process, the time system equipment provides time unified signals for the radar terminal and the reconnaissance receiver through the low-frequency cable, after the test is finished, test data are analyzed afterwards, the critical moment that the radar terminal can finish detection of radar targets in the third stage and the reconnaissance receiver can intercept radar signals in the fourth stage and the radar terminal can finish detection of radar targets and the reconnaissance receiver can not intercept radar signals is found, then the position of the radar target at the critical moment is searched, and the distance between the radar terminal and the radar target at the critical moment is calculated according to the position of the radar terminal and is used as the intercepted distance for radar critical; different target tracks are designed, the critical intercepted distance of the radar is repeatedly measured for a plurality of times, and the average value of the critical intercepted distance of the radar is taken as the final test result.
The power control strategy of the radar is carried out according to the following steps:
the radar is used as a self-closed-loop radio frequency system, and power control is performed based on echo signal power received by a radar terminal.
First, a relation between radar transmitting signal power and radar echo signal power is established:
second, the adjustment amount Δp of the transmission power is adjusted t The adjustment is as follows:
wherein: p (P) t Transmitting signal power for radar; g t Gain for radar transmit antenna; r is R D The distance is detected for the radar; f is the center frequency of the radar signal; sigma is radar reflection sectional area; g r Gain for radar receiving antenna; p (P) r For radar echo signal power, P rmin For the sensitivity of the radar receiver,the representation is rounded down, Δp is the power control step.
The path attenuation value calculation of the numerical control attenuator is carried out according to the following steps:
attenuation calculation software arranged in the comprehensive control computer calculates a path attenuation value L of the radar signal according to radar signal parameters and real-time distance between a radar end machine and a radar target transmitted by the wanted editing software and weather information p And attenuates the path attenuation value L p Issuing the weather information to a numerical control attenuator, dividing weather information in the scene wanted edit into a sunny day, a rainy day and a foggy day, and weather attenuation factor gamma s Respectively calculating according to weather information in scene planning and editing, and determining weather attenuation L according to real-time distance R between a radar terminal and a radar target s ：L s ＝γ s R, determining the path attenuation value L according to the following formula p ：L p ＝32.4+20·lg(f)+20·lg(R)+L s Wherein R is the real-time distance between the radar terminal and the radar target.
On sunny days, the weather attenuation factor gamma s The calculation formula is gamma s ＝γ o +γ V The method comprises the steps of carrying out a first treatment on the surface of the In rainy days, no explicit calculation model and formula are available, and a database table look-up mode is adopted to obtain the weather attenuation factor gamma s If the input parameters are not contained in the database, determining the weather attenuation factor gamma by adopting an interpolation method s The method comprises the steps of carrying out a first treatment on the surface of the On fog days, the types of fog include large fog, medium fog and small fog. In foggy weather environment, there is no definite calculation model and formula, and the weather attenuation factor gamma is obtained by database table look-up s If the input parameters are not contained in the database, determining the weather attenuation factor gamma by adopting an interpolation method s . Wherein, gamma o And gamma V Respectively represents oxygen and water in the air in sunny daysAbsorption decay rate of vapor.
See fig. 2. A radar critical intercepted distance testing method mainly comprises the following steps: firstly, three preparation works of building a test environment, configuring working parameters of equipment and editing a scene are carried out. The test environment is built by connecting a radar display control computer, a radar terminal, a power divider, a radar target simulator, a numerical control attenuator, a reconnaissance receiver, a reconnaissance display control computer, a comprehensive control computer and time system equipment through a radio frequency cable, a network cable and a low-frequency cable. The configuration of the equipment working parameters refers to the setting of the working parameters of the radar terminal and the reconnaissance receiver. The scene design method is characterized in that the scene design of radar detection targets and radar signal interception of a reconnaissance receiver is carried out through the built-in wanted editing software of the comprehensive control computer. Then, the target track is issued by the comprehensive control computer, and scene planning is started to be executed. The radar end machine detects an analog radar target and adjusts the transmitting power in real time according to a radar transmitting power control strategy; and attenuation calculation software arranged in the comprehensive control computer calculates attenuation values of a radar transmitting signal path in real time according to a scene of the wanted editing software and transmits the attenuation values to the numerical control attenuator, and meanwhile, the reconnaissance receiver intercepts radar signals. In the scene design execution process, four phases are passed: firstly, the radar cannot detect the simulation target, and the reconnaissance receiver cannot intercept radar signals; secondly, the radar cannot detect the simulation target, and the reconnaissance receiver intercepts radar signals; thirdly, the radar can detect the simulation target, and the reconnaissance receiver intercepts radar signals; fourthly, the radar can detect the simulation target, and the reconnaissance receiver can not intercept radar signals. Finally, after the scene is supposed to be executed, the comprehensive control computer performs post analysis on detection data of the radar terminal and interception data of the reconnaissance receiver to obtain the currently supposed radar critical intercepted distance; repeating the steps, testing for multiple times, and taking the average value as a final test result.
The foregoing is merely a preferred embodiment for implementing a multi-channel high frequency digital signal synchronization processing apparatus, and it is to be understood that the invention is not limited to the forms disclosed herein and is not to be construed as excluding other examples, but is capable of being used in various other combinations, modifications and environments and is capable of being modified within the scope of the inventive concept described herein, either by the foregoing teachings or by the skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (10)
1. A radar critical intercepted distance testing system comprising: the system is characterized in that the system comprises a radar display control computer connected with a radar terminal through a network cable, a reconnaissance display control computer connected with a reconnaissance receiver through the network cable, a comprehensive control computer connected with a radar target simulator and a digital control attenuator through the network cable, a digital control attenuator connected with a power divider and the reconnaissance receiver through a radio frequency cable, and a time system device connected with the radar target simulator and the radar terminal through the radio frequency cable and providing time unified signals for the radar terminal and the reconnaissance receiver through a low frequency cable, wherein the system comprises the following components: in the radar critical intercepted distance test, a radar display control computer sends a radar control instruction to a radar terminal through a network cable, the radar terminal responds to the radar control instruction and sends radar signals, the radar signals are divided into two paths through a power divider, one path of radar emission signals is sent to a radar target simulator, the radar target simulator carries out attenuation and delay operation on the received radar emission signals according to target tracks sent by the built-in wanted editing software of the comprehensive control computer, radar echo signals are generated and sent to the radar terminal, the radar terminal carries out target parameter calculation on the received radar echo signals and sends detection results to the radar display control computer in real time, and the radar terminal simultaneously carries out real-time adjustment on the power of the radar emission signals according to the radar emission power control strategy; the other path of radar transmitting signals are sent to a numerical control attenuator, the numerical control attenuator responds to path attenuation values issued by attenuation calculation software arranged in a comprehensive control computer, attenuation adjustment is carried out on the received radar transmitting signals, path attenuation of radar signals in the process of propagation is simulated, the attenuated radar intercepted signals are sent to a reconnaissance receiver through a radio frequency cable, the reconnaissance receiver responds to reconnaissance control instructions, interception parameter measurement is carried out on the received radar intercepted signals, and the measured interception results are transmitted to a reconnaissance display control computer in real time; after the execution is supposed to be completed, a critical moment is found, the position of a radar target at the critical moment is found, and the reconnaissance display control computer calculates the distance between the radar terminal and the radar target at the critical moment according to the position of the radar terminal to obtain the critical intercepted distance of the radar.
2. The radar critical intercepted distance testing system of claim 1 wherein: before testing, setting up a testing environment, configuring working parameters of equipment and editing a scene.
3. The radar critical intercepted distance testing system of claim 2 wherein: the construction of the test environment comprises the following steps: the radar display control computer is connected with the radar terminal machine through a network cable and is used for issuing radar control instructions and receiving radar detection result information; the radar terminal is connected with the power divider through a radio frequency cable, and the power divider is respectively connected with the radar target simulator and the digital control attenuator and is used for transmitting radar transmitting signals; the radar target simulator is connected with the radar terminal machine through a radio frequency cable and is used for transmitting radar echo signals; the comprehensive control computer is connected with the radar target simulator through a network cable and is used for transmitting a target track; the comprehensive control computer is connected with the numerical control attenuator through a network cable and is used for transmitting path attenuation values; the digital control attenuator is connected with the reconnaissance receiver through a radio frequency cable and is used for transmitting the intercepted signals of the radar; the reconnaissance display control computer is connected with the reconnaissance receiver through a network cable and is used for issuing reconnaissance control instructions and receiving the intercepted result information of the radar; the time system equipment is respectively connected with the radar terminal and the reconnaissance receiver through low-frequency cables and is used for transmitting time unification signals.
4. The radar critical intercepted distance testing system of claim 2 wherein: the configuration equipment working parameters comprise: the working parameters of the radar end machine are configured through the radar display control computer, and the working parameters of the Lei Daduan machine comprise: radar signal frequency, radar signal bandwidth, radar signal waveform, radar signal power parameters; the working parameters of the reconnaissance receiver are configured through the reconnaissance display control computer, and comprise: signal frequency band and signal threshold parameters.
5. The radar critical intercepted distance testing system of claim 2 wherein: editing a scene is intended to include: the radar end machine comprises a radar end machine initial position, an end position, a speed setting, a radar target initial position, an end position, a speed setting and a weather setting, wherein the radar end machine and the radar target initial and end positions comprise longitude, latitude and altitude, the radar end machine and the radar target move in opposite directions, and the weather information comprises sunny days, rainy days and foggy days.
6. The radar critical intercepted distance testing system of claim 1 wherein: the method comprises the steps that relative distance and relative speed between a radar target and a radar terminal are calculated in real time through the intended editing software, the relative distance and the relative speed are transmitted to a radar target simulator together with the set radar reflection sectional area, and the initial distance between the radar terminal and the radar target under the intended editing is larger than the maximum detection distance of the radar to the target and is also larger than the maximum interception distance of a reconnaissance receiver to the radar terminal.
7. The radar critical intercepted distance testing system of claim 1 wherein: after the establishment of the test environment, the configuration of the equipment working parameters and the editing of the scene design are completed, the test is carried out according to the following steps:
the comprehensive control computer transmits a target track to start testing, the radar display control computer transmits a radar control instruction to the radar terminal through a network cable, the radar terminal responds to the radar control instruction and transmits radar signals, the radar signals are divided into two paths through the power divider, one path of radar transmission signals is transmitted to the radar target simulator, the radar target simulator carries out attenuation and delay operation on the received radar transmission signals according to target tracks transmitted by the desired editing software arranged in the comprehensive control computer, a radar echo signal is generated and transmitted to the radar terminal, the radar terminal carries out target parameter calculation on the received radar echo signal and transmits detection results to the radar display control computer in real time, and the radar terminal simultaneously carries out real-time adjustment on the power of the radar transmission signals according to the radar transmission power control strategy; the other path of radar transmitting signal is sent to a numerical control attenuator, the numerical control attenuator responds to a path attenuation value issued by attenuation calculation software arranged in the comprehensive control computer, attenuation adjustment is carried out on the received radar transmitting signal, path attenuation of the radar signal in the process of propagation is simulated, the attenuated radar intercepted signal is sent to a reconnaissance receiver through a radio frequency cable, the reconnaissance receiver responds to a reconnaissance control instruction, interception parameter measurement is carried out on the received radar intercepted signal, and an interception result obtained through measurement is transmitted to a reconnaissance display control computer in real time.
8. The radar critical intercepted distance testing system of claim 1 wherein: in the test process, the time system equipment provides time unified signals for the radar end machine and the reconnaissance receiver through the low-frequency cable, after the test is finished, test data are analyzed afterwards, the radar end machine can be found out to finish detection of radar targets and the reconnaissance receiver can intercept radar signals, the radar end machine can finish detection of radar targets and the reconnaissance receiver can not intercept critical moment of radar signals, then the position of the radar target at the critical moment is searched, and the distance between the radar end machine and the radar target at the critical moment is calculated according to the position of the radar end machine and is used as the radar critical intercepted distance; different target tracks are designed, the critical intercepted distance of the radar is repeatedly measured for a plurality of times, and the average value of the critical intercepted distance of the radar is taken as the final test result.
9. The radar critical intercepted distance testing system of claim 1 wherein: performing power control based on echo signal power received by the radar terminal;
first, a relation between radar transmitting signal power and radar echo signal power is established:
second, the adjustment amount Δp of the transmission power is adjusted t The adjustment is as follows:
wherein: p (P) t Transmitting signal power for radar; g t Gain for radar transmit antenna; r is R D The distance is detected for the radar; f is the center frequency of the radar signal; sigma is radar reflection sectional area; g r Gain for radar receiving antenna; p (P) r For radar echo signal power, P rmin For the sensitivity of the radar receiver,the representation is rounded down, Δp is the power control step.
10. The radar critical intercepted distance testing system of claim 1 wherein: attenuation calculation software arranged in the comprehensive control computer calculates a path attenuation value L of the radar signal according to radar signal parameters and real-time distance between a radar end machine and a radar target transmitted by the wanted editing software and weather information p And attenuates the path attenuation value L p Issuing the weather information to a numerical control attenuator, dividing weather information in the scene wanted edit into a sunny day, a rainy day and a foggy day, and weather attenuation factor gamma s Respectively calculating according to weather information in scene planning and editing, and determining weather attenuation L according to real-time distance R between a radar terminal and a radar target s ：L s ＝γ s R, determining the path attenuation value L according to the following formula p ：L p ＝32.4+20·lg(f)+20·lg(R)+L s
Wherein R is the real-time distance between the radar terminal and the radar target.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5234293A (en) * | 1990-08-22 | 1994-03-03 | Kollmorgen Corporation | Rangefinder scanner |
| CA2554839A1 (en) * | 2004-02-26 | 2005-08-26 | Chang Industry, Inc. | Active protection device and associated apparatus, system, and method |
| CN102955153A (en) * | 2012-10-09 | 2013-03-06 | 中国人民解放军63892部队 | Method for testing detection capability of remote distance support interference equipment based on sector silence |
| CN105758269A (en) * | 2016-01-25 | 2016-07-13 | 北京宏动科技有限公司 | Wireless synchronous testing simulation system of ultra-wideband radio fuse |
| CN108471334A (en) * | 2018-02-11 | 2018-08-31 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method of test assessment data-link LPI performances |
| CN108833025A (en) * | 2017-12-29 | 2018-11-16 | 西安电子科技大学 | The low interception performance appraisal procedure of spread spectrum radar communication integrated system |
| CN109217947A (en) * | 2018-07-26 | 2019-01-15 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method that test data chain radiation of equipment signal is trapped probability performance |
| CN110045341A (en) * | 2019-02-28 | 2019-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Radar altimeter low interception performance test method |
| CN111257655A (en) * | 2020-02-28 | 2020-06-09 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Intercepted distance testing device for radio frequency sensor |
-
2021
- 2021-06-30 CN CN202110730550.9A patent/CN113466807B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5234293A (en) * | 1990-08-22 | 1994-03-03 | Kollmorgen Corporation | Rangefinder scanner |
| CA2554839A1 (en) * | 2004-02-26 | 2005-08-26 | Chang Industry, Inc. | Active protection device and associated apparatus, system, and method |
| CN102955153A (en) * | 2012-10-09 | 2013-03-06 | 中国人民解放军63892部队 | Method for testing detection capability of remote distance support interference equipment based on sector silence |
| CN105758269A (en) * | 2016-01-25 | 2016-07-13 | 北京宏动科技有限公司 | Wireless synchronous testing simulation system of ultra-wideband radio fuse |
| CN108833025A (en) * | 2017-12-29 | 2018-11-16 | 西安电子科技大学 | The low interception performance appraisal procedure of spread spectrum radar communication integrated system |
| CN108471334A (en) * | 2018-02-11 | 2018-08-31 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method of test assessment data-link LPI performances |
| CN109217947A (en) * | 2018-07-26 | 2019-01-15 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method that test data chain radiation of equipment signal is trapped probability performance |
| CN110045341A (en) * | 2019-02-28 | 2019-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Radar altimeter low interception performance test method |
| CN111257655A (en) * | 2020-02-28 | 2020-06-09 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Intercepted distance testing device for radio frequency sensor |
Non-Patent Citations (3)
| Title |
|---|
| "雷达被截获距离的等效试验方法研究";曾小东;《电子技术应用》;第47卷(第3期);第111-114页 * |
| 基于多通道雷达的对侦察接收机截获距离压制设计;孙志勇;姜秋喜;莫翠琼;;火力与指挥控制(06);全文 * |
| 相控阵雷达系统低截获概率设计;郑传林, 徐绵起, 朱剑平;空军雷达学院学报(01);全文 * |
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