CN113357964B - Radar simulator - Google Patents
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- CN113357964B CN113357964B CN202110432243.2A CN202110432243A CN113357964B CN 113357964 B CN113357964 B CN 113357964B CN 202110432243 A CN202110432243 A CN 202110432243A CN 113357964 B CN113357964 B CN 113357964B
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Abstract
The invention discloses a radar simulator suitable for testing a real test device, which comprises: the detection and power measurement module is in signal connection with the target simulator and comprises a detection submodule and a power measurement submodule; a servo motor control module configured to control rotation of an antenna in the detection and power measurement module according to a signal output by the detection and power measurement module; the signal processing and control unit is configured to perform signal interface of a simulated radar signal of the radar simulator and the test equipment, read a signal output by the detection and power measurement module to generate a simulation instruction and voltage, and control the servo motor control module; and the analog transmitter is configured to output a microwave point frequency signal consistent with the radar frequency during the test process and transmit the microwave point frequency signal to a frequency agile signal source of the test equipment. The radar simulator can complete the measurement of the horn antenna angle position of the target simulator, simplify the system design and reduce the equipment cost.
Description
Technical Field
The embodiment of the invention belongs to the technical field of radar testing, relates to a radar simulator, and particularly relates to a radar simulator for simulating and outputting radar response data according to excitation input of automatic testing equipment.
Background
In the training process of the test operation of the radar seeker, the radar seeker testing equipment is generally used for mounting, and the radar seeker of the test training missile is mounted as a tested object. On the one hand, the service life of the radar seeker is consumed, and high-strength training is not facilitated; on the other hand, the loading state of the radar seeker has a large influence on the training process, and the loading process causes higher training cost. Therefore, a radar (seeker) simulator is urgently needed to be developed, is used as a simulated measured object of radar seeker testing equipment, is used for radar seeker testing operation training, reduces the actual installation consumption, reduces the training cost and improves the training benefit.
Disclosure of Invention
When a radar seeker simulator is developed, response data of a radar seeker needs to be output according to test excitation input of radar seeker test equipment and test instructions, test flows and test indexes of the test equipment. In the process of testing the monopulse radar seeker, the radar seeker simulator needs to measure the deviation angle of the position of a horn antenna of the target simulator of the testing equipment relative to the elastic axis, simulate the target angle tracking process of the monopulse radar seeker and output response data to the testing equipment.
Because the horn antenna of the test equipment target simulator is a certain distance away from the radar seeker simulator and no physical connection exists between the horn antenna and the radar seeker simulator, in order to measure the deviation angle of the position of the horn antenna of the test equipment target simulator relative to the elastic shaft, a single-pulse radar antenna and two radar receiver channels are generally needed to receive microwave signals radiated by the horn antenna of the test equipment target simulator. However, when the angle position of the horn antenna of the target simulator is measured by the monopulse goniometry technique, the equipment is complicated and therefore the cost is high.
In order to solve the problem of measuring the angle position of the horn antenna of the target simulator when the horn antenna of the target simulator of the test device is not physically connected with the radar seeker simulator, the embodiment of the invention provides the radar simulator so as to simplify the system design and reduce the device cost.
According to one aspect of the present invention there is provided a radar simulator adapted to be tested using real test equipment, comprising: the detection and power measurement module is in signal connection with the target simulator and comprises a detection submodule and a power measurement submodule, wherein the detection submodule is configured to receive and detect power of a microwave signal output by the target simulator, and the power measurement submodule is configured to sample the analog number of detection voltage and calculate the power of an input signal; a servo motor control module configured to control rotation of an antenna in the detection and power measurement module according to a signal output by the detection and power measurement module; the signal processing and control unit is configured to perform signal interface of a simulated radar signal of the radar simulator and the test equipment, read a signal output by the detection and power measurement module to generate a simulated instruction and a voltage, and control the servo motor control module; and the analog transmitter is communicated with the signal processing and controlling unit and is configured to output a microwave point frequency signal consistent with the radar frequency in the testing process and transmit the microwave point frequency signal to a frequency agile signal source of the testing equipment.
The embodiment of the invention can complete the measurement of the angle position of the horn antenna of the target simulator by only adopting one receiver channel, thereby simplifying the system design and reducing the equipment cost.
Other objects and advantages of the present invention will become apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, and may help to provide a full understanding of the present invention.
Drawings
The invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a functional block diagram of a radar simulator of one embodiment of the present invention;
FIG. 2 is a functional block diagram of a radar simulator of another embodiment of the present invention;
FIG. 3 is a block diagram of the signal processing and control unit circuit;
FIG. 4 is a block diagram of the components of an analog transmitter;
FIG. 5 illustrates a first angular search state of the radar simulator;
fig. 6 shows a second angle search state of the radar simulator.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details.
According to the general inventive concept, there is provided a radar simulator adapted to be tested using real test equipment, including: the detection and power measurement module is in signal connection with the target simulator and comprises a detection sub-module and a power measurement sub-module, wherein the detection sub-module is used for receiving and performing power detection on a microwave signal output by the target simulator, and the power measurement sub-module is used for sampling the analog-to-digital (AD) of a detection voltage and calculating the power of an obtained input signal; a servo motor control module configured to control rotation of an antenna in the detection and power measurement module according to a signal output by the detection and power measurement module; the signal processing and control unit is configured to perform signal interface of the simulated radar signal of the radar simulator and the test equipment, read the signal output by the detection and power measurement module to generate a simulated command and voltage, and control the servo motor control module; and the analog transmitter is communicated with the signal processing and controlling unit and is configured to output a microwave point frequency signal consistent with the radar frequency in the testing process and transmit the microwave point frequency signal to a frequency agile signal source of the testing equipment. Therefore, the embodiment of the invention can finish the measurement of the angle position of the horn antenna of the target simulator by only adopting one receiver channel. This arrangement simplifies system design and reduces equipment costs.
FIG. 1 is a functional block diagram of a radar simulator of one embodiment of the present invention. As shown in fig. 1, the radar simulator includes a detection and power measurement module, a signal processing and control unit, and a servo motor control module. The detection and power measurement module is in signal connection with the target simulator and comprises a detection submodule and a power measurement submodule. The detection sub-module is configured to receive and power detect the microwave signal output by the target simulator. The power measurement sub-module is configured to sample the AD of the detected voltage and calculate the power of the resulting input signal. The servo motor control module is configured to control rotation of an antenna in the detection and power measurement module based on the signal output by the detection and power measurement module. The signal processing and control unit is configured to interface the simulated radar signals of the radar simulator with signals of the test equipment, read signals output by the detection and power measurement module to generate simulated commands and voltages, and control the servo motor control module. In an embodiment, the signal processing and control unit is respectively communicated with the detection and power measurement module and the servo motor control module to correspondingly control the detection and power measurement module and the servo motor control module.
In an embodiment, as shown in fig. 2, the radar simulator further comprises an analog transmitter configured to output a microwave spot frequency signal corresponding to the radar frequency during the test and to transmit the microwave spot frequency signal to the frequency agile signal source of the real test equipment. The signals transmitted to the frequency agile signal source are guided to generate signals with the same frequency, and the signals are transmitted to the target radiation loudspeaker, so that the frequency of the receiving signals of the detection and power measurement module is kept constant. Therefore, the complete signal frequency agility tracking process of the radar seeker is simulated, and the radar simulator is allowed to use real testing equipment for testing; and the frequency of the actual detection and power measurement module is kept constant, so that the design difficulty of the system and the complexity of a circuit are greatly reduced, and the cost is reduced.
Fig. 4 is a block diagram of the components of an analog transmitter. As shown in fig. 4, the analog transmitter includes a reference source, a comb spectrum generator, a filter, a frequency multiplier, and a radio frequency switch. In one example, a reference source outputs a high-stability frequency reference signal of, for example, 100MHz, an integral multiple harmonic of the 100MHz frequency reference signal is generated through a comb spectrum generator, then other harmonic components are filtered through a filter, an 11-order harmonic signal with the frequency of 1.1GHz is output, a Ka-band continuous wave signal is output through a frequency multiplier, and then a radio frequency switch is used for modulation and outputting an analog Ka-band pulse modulation radar signal.
As shown in fig. 1 and 2, the detector module includes a parabolic antenna, a single-mode feed (e.g., a single-horn single-mode feed) located at a focus of the parabolic antenna, a preamplifier, a mixer, a microwave local oscillator, an amplifier, a filter, and a detector, which are arranged in sequence. In an embodiment, the parabolic antenna is configured to focus the microwave signal from the target simulator at a single mode feed. In an embodiment, the single mode feed is configured to convert the received microwave signal into a circular waveguide TE11 mode and output to the input of the preamplifier. In one example, the aperture of the single mode feed of the single horn matches the focal aperture of the parabolic antenna. In one example, the single horn single mode feed may be a conical horn, but may be provided in any other suitable shape as desired. In an embodiment, the preamplifier is configured to amplify an input microwave signal and output the amplified microwave signal to the input of the mixer. In an embodiment, the mixer is configured to mix an input microwave signal with a microwave local oscillator signal output by a microwave local oscillator, output a difference frequency signal of the two to obtain an intermediate frequency received signal, and output the intermediate frequency received signal to an input terminal of the amplifier. In an embodiment, the amplifier is configured to amplify and output the intermediate frequency signal to an input of the filter. In an embodiment, the filter is configured to filter the intermediate frequency signal to reject out-of-band signals and output to an input of the detector. In an embodiment, the detector is configured to power detect the amplified, filtered intermediate frequency signal and output a video detection signal to the power measurement sub-module.
As shown in fig. 1 and 2, the power measurement sub-module includes a pulse shaping unit and an analog-to-digital sampling converter. The pulse shaping unit is configured to pulse shape the video detection signal from the detector to obtain detected pulses. In one example, the pulse shaping unit shapes the video detection signal into rectangular pulses, for example, the pulse shaping unit may be implemented by using a multivibrator, a schmitt trigger, or a monostable trigger. An analog-to-digital (AD) sampling converter is configured to sample-convert the video detection signal from the detector at the rising edge of the detection pulse, outputting an amplitude sample of the video detection signal as a measure of the power of the received microwave signal.
The embodiment of the invention adopts the parabolic antenna, the single-horn single-mode feed source and the single-path microwave receiver channel to complete the angle position measurement of the horn antenna of the target simulator, thereby simplifying the system design and reducing the equipment cost.
As shown in fig. 2, the signal processing and control unit is configured to read the power value of the microwave signal input by the analog-to-digital sampling converter, and output an instruction of antenna pointing control and transmit the instruction to the servo motor control module; and the servo motor control module is configured to control the antenna to rotate to the azimuth angle determined by the antenna pointing control instruction according to the input antenna pointing control instruction.
Fig. 3 is a block diagram of the signal processing and control unit circuit. As shown in fig. 3, the signal processing and control unit includes a power supply circuit, a relay switch circuit, a digital interface circuit, a digital-to-analog (DA) conversion circuit, a serial bus interface circuit, a multi-sampling circuit, a processor (e.g., a DSP chip), and a controller (e.g., an FPGA chip). The processor is respectively connected with a comprehensive control machine and a control console arranged in a command center through a serial bus interface circuit to receive and process control instructions; the processor is connected with the detector through a multi-path sampling circuit, reads the power value of the microwave signal through the multi-path sampling circuit when in use, and simultaneously outputs an instruction of antenna pointing control from the processor to the servo motor control module; and the processor receives test signals from the test equipment through the relay switch and the digital interface circuit.
In an embodiment, the instructions for antenna pointing control include instructions for controlling the parabolic antenna to search within a first angular range and to search within a second angular range. When the microwave antenna works, the servo motor control module controls the parabolic antenna to search within a first angle range at a first preset angular speed, and the processor compares the power value of the received microwave signal with a set first power value threshold so as to judge whether to execute a command of searching within a second angle range; when the processor judges that the command of searching in the second angle range is executed, the servo motor control module controls the parabolic antenna to search in the second angle range at a second preset angular speed, and the processor compares the power value of the received microwave signal with a set second power value threshold to judge whether the parabolic antenna continues to search in the second angle range in the next antenna period. In an example, the first angular range is greater than the second angular range.
Accordingly, the radar simulator is capable of operating in a first angle search state and a second angle search state. In the first angle searching state, the servo motor control module controls the antenna to search within a first angle range at a first predetermined angular velocity (for example, the angular velocity is set to 30 degrees/second) to obtain a preliminary measurement result of the horn antenna angular position of the test device, as shown in fig. 5. In the second angle searching state, the servo motor control module controls the antenna to search within a second angle range at a first predetermined angular velocity, so as to obtain a tracking measurement result of the horn antenna angular position of the test device, as shown in fig. 6. In an embodiment, the first angular range is greater than the second angular range. In the illustrated embodiment, the first angular range includes a range of-90 degrees to +90 degrees and the second angular range includes a range of-5 degrees to +5 degrees. It will be apparent to those skilled in the art that embodiments of the present invention are not limited thereto, and any suitable angular range may be provided as desired. For example, the first angular range includes a range of-60 degrees to +60 degrees, and the second angular range includes a range of-10 degrees to +10 degrees, for example, -4 degrees to-6 degrees, or-3 degrees to-7 degrees.
For example, in the upper two graphs of fig. 5, a search is performed in an angle search range of plus or minus 90 degrees, and the measured value of the power of the corresponding microwave signal is maximum at a first angle, for example, 0 °, whereby an azimuth angle at which the preliminary measurement result is 0 ° can be determined. In the two lower graphs of fig. 5, a search is made in an angle search range of plus or minus 90 degrees, and the measured value of the power of the corresponding microwave signal is maximized at a second angle, for example +5 °, whereby an azimuth angle of which the preliminary measurement result is +5 ° can be determined. For example, in the upper two graphs of fig. 6, a search is performed in an angle search range of-4 ° to-6 ° and the measured value of the power of the corresponding microwave signal is the largest at +1 °, whereby the azimuth angle of which the measured result is +1 ° can be determined. In the lower two graphs of fig. 6, a search is performed at an angle search range of-3 ° to-7 ° and the measured value of the power of the corresponding microwave signal is maximum at +2 °, whereby an azimuth angle of +2 ° as a measurement result can be determined.
In an embodiment, when the radar simulator is in a first angle searching state, the radar simulator autonomously controls the antenna to search within a range of positive and negative 90 degrees at a first predetermined angular speed and the center position of a searching angle is 0 degree, and when the antenna rotates to a position of positive 90 (+ 90) degrees or negative 90 (-90) degrees, the signal processing and control module controls the servo motor to rotate in the reverse direction, so that the periodic search of the antenna is completed. In one example, the search angle center position is 0 degrees, which is the antenna pointing direction when the parabolic antenna pointing direction coincides with the longitudinal axis direction of the radar simulator and is parallel to the ground horizontal direction.
As shown in fig. 5, while the radar simulator autonomously controls the antenna to search for the first angle range, the radar simulator measures and records the measured value (i.e. power value) of the power of the received microwave signal at radar repetition intervals, and if the search for one search period (i.e. one antenna period) is completed and the measured values of the power of the received microwave signal in one search period all exceed a predetermined threshold (i.e. a first power threshold, for example, the power is-90 dBm), the radar simulator switches to the second angle search state, otherwise, the first angle search for a new period is continued (i.e. the search angle center position still continues to search for a new antenna period centered at 0 degrees).
As shown in fig. 5, when the radar simulator is in the first angle search state, the antenna pointing angle corresponding to the maximum value of the measured values of the power of the microwave signal in one search period is taken as the preliminary measurement result of the horn antenna angle position of the target simulator.
As shown in fig. 6, when the radar simulator starts the second angle search state, the second angle range is centered on the preliminary measurement result, the radar simulator controls the parabolic antenna to perform a periodic search of the second angle range at a second predetermined angular velocity (for example, the angular velocity is set to 30 degrees/second) within a range of plus or minus 5 degrees from the center position, and measures and records the measured value of the power of the received microwave signal at radar repetition intervals, and records the antenna pointing angle corresponding to the maximum value of the measured value of the power of the microwave signal in one search period within the range of plus or minus 5 degrees as the tracking measurement result of the horn antenna angle position of the test equipment, and simultaneously starts the second angle range search of the next period, and the tracking measurement result of the horn antenna angle position of the second angle range or more searched in the next period is centered on the second angle range. In one example, the first predetermined angular velocity and the second predetermined angular velocity may be set to be the same angular velocity or may be set to be different angular velocities, and those skilled in the art may select and set the angular velocities accordingly as needed. This example is only an illustrative example and a person skilled in the art should not be interpreted as a limitation of the invention.
In an embodiment, when the radar simulator is in the second angle search state, if the power of the microwave signals received by the search of the second angle range in one search period is less than a predetermined threshold (i.e. the second power threshold), the radar simulator switches to the first angle search state again.
In an embodiment, when the radar simulator is in the second angle searching state, the signal processing and control unit outputs a measurement result of an antenna angle position once within one search period, and the radar simulator outputs the measurement result to the real test equipment as a response output data to a horn antenna angle position of the real test equipment.
The operation of the radar simulator will be further described below with reference to the structure and principle of the simulator.
The horn antenna of the target simulator transmits a microwave pulse signal, and the processor transmits an antenna pointing control command to the servo motor control module, and the servo motor controls the parabolic antenna to search for the target (i.e., search target simulator) at a first predetermined angular velocity (e.g., -90 °, +90 ° ] starting from an orientation with a search angular center position of 0 within a first angular range (e.g., [ -90 °, +90 ° ], as shown in fig. 5). At the moment, the multi-path sampling circuit carries out continuous repeated interval sampling to obtain a plurality of microwave signal power values. When the parabolic antenna completes the search of one antenna cycle, and the obtained microwave signal power values do not exceed a set first power threshold (for example, 90 dBm), the processor sends an instruction to the servo motor control module that the parabolic antenna enters a new antenna cycle and continues to search within a first angle range. In one example, when the first angle range is [ -90 °, +90 ° ], then one antenna period is for the parabolic antenna to scan from the antenna angle-90 ° to +90 °, then from the antenna angle +90 ° to-90 °, and the search angle center position is 0 °. In one example, when the center position of the search angle is 0 °, the search of the parabolic antenna is aligned with the longitudinal axis direction of the radar simulator.
When the obtained multiple signal power values all exceed a set first power threshold (for example, the power value is +90 dBm), the processor sends an instruction that the parabolic antenna enters a search in a second angle range to the servo motor control module, and the processor sorts the multiple microwave signal power values to obtain a first maximum power value (as shown in fig. 5, when the parabolic antenna is pointed to the horn antenna, the power value is maximum when the horn antenna is located at an azimuth angle of +5 ° of the parabolic antenna), where a parabolic antenna pointing angle (i.e., an angle at which the horn antenna is located at the azimuth angle of the parabolic antenna when the parabolic antenna is pointed to the horn antenna) corresponding to the first maximum power value is used as a parabolic antenna center position when the parabolic antenna searches in the second angle search range (for example, a position at which the horn antenna is pointed at +5 ° is used as a search angle center position when a search in the second angle search range is performed).
The parabolic antenna enters the search target within a second angular range (e.g., -5, + 5). The parabolic antenna searches at a second fixed angular velocity (for example, 30 °/s) with the parabolic antenna pointing angle corresponding to the first maximum power as the search angle center position. The multi-path sampling circuit obtains a plurality of microwave signal power values by continuously repeating sampling at intervals. When the parabolic antenna completes one antenna period search and the power values of a plurality of microwave signals do not exceed a second power threshold (for example, -90 dBm), the processor sends an instruction for ending the search in the second angle range to the servo motor control module and sends an instruction for reentering the parabolic antenna to search in the first angle range with the search angle center position being 0 degree. In one example, when the second angle range is [ -5 °, +5 ° ] then one antenna period is for the parabolic antenna to scan from the antenna angle-5 ° to +5 °, then from the antenna angle +5 ° to-5 °, and the search angle center position is the orientation where the parabolic antenna points at 5 °.
When the microwave signal power values are all larger than a second power threshold (for example, -90 dBm), the processor controls the parabolic antenna to enter the next antenna cycle through the servo motor control module and continues to search within a second angle range (for example [ -5 °, +5 ° ]), and the processor sorts the microwave signal power values to obtain a second maximum power value (the power value is maximum at +1 ° as shown in fig. 6), and the parabolic antenna pointing angle corresponding to the second maximum power value is used as the search angle center position when the parabolic antenna searches within the second angle search range in the next antenna cycle (for example, as shown in fig. 6, the power of the horn antenna is maximum when the horn antenna is located at +1 ° of the parabolic antenna, and the position when the parabolic antenna points at +1 ° in the next antenna cycle is the search angle center position). The searching method and the determining method in the second angle range in the next antenna period are completely the same as the searching method and the determining method for searching the target in the second angle range by the parabolic antenna, and are not described herein again.
And (4) the parabolic antenna simulates searching the target until the radar simulator simulates to hit the target simulator, and the searching is terminated.
When the parabolic antenna receives electromagnetic waves transmitted by the target simulator, the electromagnetic waves are sorted through the single-horn single-mode feed source, then the single-horn single-mode feed source converts the sorted microwave signals into a circular waveguide TE11 mode, and then the microwave signals are output to the input end of the preamplifier. The preamplifier amplifies the received microwave signal and outputs the microwave signal to the input end of the mixer; the mixer mixes the input microwave signal with the microwave local oscillator signal output by the microwave local oscillator, outputs the difference frequency signal of the input microwave signal and the microwave local oscillator signal to obtain an intermediate frequency receiving signal, and then outputs the intermediate frequency receiving signal to the input end of the amplifier; the amplifier amplifies the intermediate frequency signal, and the filter filters the intermediate frequency signal to inhibit out-of-band signals; the detector performs power detection on the amplified and filtered intermediate frequency signal, outputs a video detection signal and respectively outputs the video detection signal to the pulse shaping unit and the AD sampling converter; the pulse shaping unit carries out pulse shaping on an input video detection signal to obtain a detection pulse; the AD sampling converter performs sampling conversion on the video detection signal at the rising edge of the detection pulse, and outputs an amplitude sampling value of the video detection signal as a measured value of the power of the received microwave signal.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A radar simulator adapted to be tested using real test equipment, comprising:
the detection and power measurement module is in signal connection with the target simulator and comprises a detection submodule and a power measurement submodule, wherein the detection submodule is configured to receive and detect power of a microwave signal output by the target simulator, and the power measurement submodule is configured to sample an analog-to-digital (AD) of a detection voltage and calculate and obtain power of an input signal;
a servo motor control module configured to control rotation of an antenna in the detection and power measurement module according to a signal output by the detection and power measurement module;
the signal processing and control unit is configured to perform signal interface between the simulated radar signal of the radar simulator and the test equipment, read the signal output by the detection and power measurement module to generate a simulated instruction and voltage, and control the servo motor control module; and
the analog transmitter is communicated with the signal processing and control unit and is configured to output microwave point frequency signals consistent with radar frequency in the testing process and transmit the microwave point frequency signals to a frequency agile signal source of the testing equipment, wherein the detection submodule comprises a parabolic antenna, a single-mode feed source positioned at the focus of the parabolic antenna, a preamplifier, a mixer, a microwave local oscillator, an amplifier, a filter and a detector which are sequentially arranged,
wherein the parabolic antenna is configured to focus the microwave signal from the target simulator at a single-mode feed,
the single-mode feed source is configured to convert the received microwave signal into a circular waveguide TE11 mode and output the signal to the input end of the preamplifier,
the preamplifier is configured to amplify an input microwave signal and output the amplified signal to an input terminal of the mixer,
the mixer is configured to mix an input microwave signal with a microwave local oscillator signal output by the microwave local oscillator, output a difference frequency signal of the input microwave signal and the microwave local oscillator signal to obtain an intermediate frequency receiving signal, and output the intermediate frequency receiving signal to an input end of the amplifier;
the amplifier is configured to amplify the intermediate frequency receiving signal and output the amplified signal to an input end of the filter;
the filter is configured to filter the intermediate frequency receiving signal to suppress an out-of-band signal and output the out-of-band signal to an input terminal of the detector;
the detector is configured to perform power detection on the amplified and filtered intermediate frequency signal and output a video detection signal to the power measurement sub-module, wherein the power measurement sub-module includes:
a pulse shaping unit configured to pulse-shape the video detection signal from the detector to obtain a detection pulse; and
the analog-digital sampling converter is configured to sample and convert a video detection signal from the detector at the rising edge of a detection pulse, and output an amplitude sampling value of the video detection signal as a measured value of the power of a received microwave signal, wherein the signal processing and control unit comprises a serial bus interface circuit, a multi-path sampling circuit, a relay switch, a digital interface circuit and a processor, the processor is respectively connected with an integrated control machine and a control console arranged in a command center through the serial bus interface circuit to receive and process a control command, the processor is connected with the detector through the multi-path sampling circuit, the processor reads the power value of the microwave signal through the multi-path sampling circuit when in use, and simultaneously outputs a command of antenna pointing control from the processor to a servo motor control module, and the processor receives a test signal from a test device through the relay switch and the digital interface circuit; and
the servo motor control module is configured to control the antenna to rotate to the azimuth angle determined by the antenna pointing control instruction according to the input antenna pointing control instruction, wherein the antenna pointing control instruction comprises an instruction for controlling the parabolic antenna to search in a first angle range and search in a second angle range,
when the microwave antenna works, the servo motor control module controls the parabolic antenna to search within a first angle range at a first preset angular speed, and the processor compares the power value of the received microwave signal with a set first power value threshold so as to judge whether to execute a command of searching within a second angle range;
when the processor judges that the instruction of searching in the second angle range is executed, the servo motor control module controls the parabolic antenna to search in the second angle range at a second preset angular speed, and the processor compares the power value of the received microwave signal with a set second power value threshold to judge whether the parabolic antenna continues to search in the second angle range in the next antenna period,
wherein the first angular range is greater than the second angular range.
2. The radar simulator of claim 1, wherein the processor comparing the received microwave signal power value to a first power value threshold comprises: when the parabolic antenna searches in a first angle range, the multi-path sampling circuit obtains a plurality of microwave signal power values through repeated sampling at intervals, when the plurality of microwave signal power values are all larger than a set first power threshold, the processor sends an instruction for entering searching in a second angle range to the servo motor control module, the processor sorts the plurality of microwave signal power values to obtain a first maximum power value, and a parabolic antenna pointing angle corresponding to the first maximum power value is used as a searching angle center position of the parabolic antenna when the parabolic antenna searches in the second angle searching range.
3. The radar simulator of claim 1, wherein, when searching within the first angular range, the parabolic antenna completes a search for one antenna cycle and the processor receives no microwave signal power values that exceed a first power threshold, the processor sends an instruction to the servo motor control module to enter a new antenna cycle and continue searching within the first angular range.
4. The radar simulator of any one of claims 1-3, wherein the multi-sampling circuit obtains a plurality of microwave signal power values by repeated sampling at intervals when the parabolic antenna searches in a second angular range, and when the plurality of microwave signal power values are all larger than a set second power threshold, the processor controls the parabolic antenna to enter a next antenna cycle through the servo motor control module and continue searching in the second angular range; or
When the parabolic antenna searches in the second angle range and the power values of the plurality of microwave signals do not exceed the second power threshold, the processor sends an instruction for reentering searching in the first angle range to the servo motor control module.
5. The radar simulator of claim 4, wherein the parabolic antenna searches within a second angular range, the plurality of microwave signal power values are sorted to obtain a second maximum power value, and a parabolic antenna pointing angle corresponding to the second maximum power value is used as a search angle center position of the parabolic antenna when searching within the second angular search range in a next antenna cycle.
6. The radar simulator of claim 5, wherein the signal processing and control unit outputs the parabolic antenna pointing angle obtained each time the parabolic antenna searches within the second angle range to the test device and outputs data as a response to the horn antenna of the target simulator;
when searching in the first angle range, the center position of the searching angle of the parabolic antenna is 0 degree.
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| CN202110432243.2A Active CN113357964B (en) | 2021-04-21 | 2021-04-21 | Radar simulator |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085071A (en) * | 1963-11-15 | 1967-09-27 | Elliott Brothers London Ltd | Radar target simulators |
| FR2597617A1 (en) * | 1986-04-18 | 1987-10-23 | Thomson Csf | Device forming lines of sight |
| JPH07311257A (en) * | 1994-05-16 | 1995-11-28 | Tech Res & Dev Inst Of Japan Def Agency | Radar target wave simulator |
| CN102508215A (en) * | 2011-09-29 | 2012-06-20 | 北京振兴计量测试研究所 | Double-channel active and passive radar integrated simulator |
| CN102590794A (en) * | 2012-02-28 | 2012-07-18 | 北京航空航天大学 | Broadband coherent radar target simulator |
| 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 |
| CN110187332A (en) * | 2019-05-15 | 2019-08-30 | 中科宇达（北京）科技有限公司 | Low-level defence radar system and method based on digital beam forming technology |
| CN209656878U (en) * | 2019-01-28 | 2019-11-19 | 中国气象局气象探测中心 | A kind of automatic testing equipment for weather radar |
| CN111007469A (en) * | 2019-12-25 | 2020-04-14 | 上海铭剑电子科技有限公司 | Receiver of radar simulator |
-
2021
- 2021-04-21 CN CN202110432243.2A patent/CN113357964B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085071A (en) * | 1963-11-15 | 1967-09-27 | Elliott Brothers London Ltd | Radar target simulators |
| FR2597617A1 (en) * | 1986-04-18 | 1987-10-23 | Thomson Csf | Device forming lines of sight |
| JPH07311257A (en) * | 1994-05-16 | 1995-11-28 | Tech Res & Dev Inst Of Japan Def Agency | Radar target wave simulator |
| CN102508215A (en) * | 2011-09-29 | 2012-06-20 | 北京振兴计量测试研究所 | Double-channel active and passive radar integrated simulator |
| CN102590794A (en) * | 2012-02-28 | 2012-07-18 | 北京航空航天大学 | Broadband coherent radar target simulator |
| 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 |
| CN209656878U (en) * | 2019-01-28 | 2019-11-19 | 中国气象局气象探测中心 | A kind of automatic testing equipment for weather radar |
| CN110187332A (en) * | 2019-05-15 | 2019-08-30 | 中科宇达（北京）科技有限公司 | Low-level defence radar system and method based on digital beam forming technology |
| CN111007469A (en) * | 2019-12-25 | 2020-04-14 | 上海铭剑电子科技有限公司 | Receiver of radar simulator |
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| CN113357964A (en) | 2021-09-07 |
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