CN114063029A - Method and system for detecting radar performance, computer device and readable storage medium - Google Patents
Method and system for detecting radar performance, computer device and readable storage medium Download PDFInfo
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- CN114063029A CN114063029A CN202111358171.8A CN202111358171A CN114063029A CN 114063029 A CN114063029 A CN 114063029A CN 202111358171 A CN202111358171 A CN 202111358171A CN 114063029 A CN114063029 A CN 114063029A
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Abstract
The invention discloses a method for detecting radar performance, which comprises the following steps: receiving a transmitting signal sent by a radar to be tested through a testing radar; filtering the emission signal to obtain a signal to be detected; carrying out first signal amplification processing on a signal to be detected to obtain a first processed signal; carrying out numerical control attenuation processing on the first processing signal based on a first preset condition to obtain a frequency-reduced amplified signal; carrying out first local oscillation processing on the amplified signal to obtain a second processed signal; the first local oscillator processing is used for reducing the frequency of the amplified signal; executing a first processing operation on the second processing signal and obtaining the transmitting power of the radar to be tested through a selection instruction of the test radar, or executing a second processing operation on the second processing signal and obtaining the test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal; and obtaining a radar performance detection result of the radar to be detected according to the transmitting power and the receiving power. The invention improves the accuracy of radar performance detection.
Description
Technical Field
The embodiment of the invention relates to the technical field of signal processing, in particular to a method and a system for detecting radar performance, computer equipment and a readable storage medium.
Background
A microwave sensor is a sensor for detecting the speed, distance, and angle of a target by electromagnetic waves. In a general method for testing a radar sensor, a radar to be tested is aimed at one radar calibrator, and the performance of the radar is obtained by irradiating the same radar calibrator according to different radars. However, the existing method for calibrating the radar to be measured by the radar calibrator has the following problems: the method occupies a large area, and a production field needs 5 to 6 square meters approximately, so that the measurement result is rough, and the performance data of the radar to be measured cannot be accurately measured, thereby accurately obtaining the performance result of the radar to be measured.
Disclosure of Invention
In view of the above, an object of the embodiments of the present invention is to provide a method, a system, a computer device and a readable storage medium for detecting radar performance, so as to solve the problem in the prior art that the accuracy of measuring performance data of a radar to be detected is low.
In order to achieve the above object, an embodiment of the present invention shows a method for detecting radar performance, where the method includes:
receiving a transmitting signal sent by a radar to be tested through a testing radar;
filtering the emission signal to obtain a signal to be detected;
performing first signal amplification processing on the signal to be detected to obtain a first processed signal;
carrying out numerical control attenuation processing on the first processing signal based on a first preset condition to obtain an amplified signal; wherein the digitally controlled attenuation process is used to reduce the frequency of the first processed signal;
performing first local oscillation processing on the amplified signal to obtain a second processed signal; wherein the first local oscillator processing is configured to reduce a frequency of the amplified signal;
executing a first processing operation on the second processing signal and obtaining the transmitting power of the radar to be tested through the selection instruction of the test radar, or executing a second processing operation on the second processing signal and obtaining a test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
and obtaining a radar performance detection result of the radar to be detected according to the transmitting power and the receiving power of the radar to be detected.
Further, the selection instruction comprises a first selection instruction, and the first selection instruction is used for instructing to execute the first processing operation on the second processing signal and obtain the transmitting power of the radar to be detected;
the executing the first processing operation on the second processing signal and obtaining the transmitting power of the radar to be detected further includes:
screening the second processed signal according to a preset first signal frequency range, and obtaining a third processed signal, wherein the third processed signal is a signal with the frequency within the preset first signal frequency range;
performing second local oscillation processing on the third processed signal to obtain a fourth processed signal, wherein the second local oscillation processing is used for reducing the frequency of the third processed signal;
performing second signal amplification processing on the fourth processed signal to obtain a fifth processed signal;
performing intermediate frequency filtering on the fifth processed signal to obtain an intermediate frequency signal;
and processing the intermediate frequency signal to obtain the transmitting power of the radar to be detected.
Further, the performing a second local oscillation process on the third processed signal to obtain a fourth processed signal further includes:
acquiring a second local oscillation signal provided by a control chip in the test radar;
and performing second frequency mixing processing on the third processed signal based on the second local oscillator signal, and obtaining a fourth processed signal, wherein the frequency of the fourth processed signal is lower than that of the third processed signal.
Further, the selection instruction includes a second selection instruction, where the second selection instruction is used to instruct to perform the second processing operation on the second processing signal and obtain the test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
the executing the second processing operation on the second processed signal and obtaining the test signal so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal further includes:
screening the second processing signal according to a preset second signal frequency range to obtain a sixth processing signal; wherein the sixth processing signal is a signal whose frequency is within the preset second signal frequency range;
carrying out polarization local oscillation processing on the sixth processing signal to obtain a seventh processing signal, wherein the polarization local oscillation is used for increasing the frequency of the sixth processing signal;
performing third signal amplification processing on the seventh processed signal to obtain an eighth processed signal;
filtering the eighth processing signal to obtain the test signal;
transmitting the test signal to the radar to be tested through the test radar so that the radar to be tested: and receiving the test signal, and analyzing the test signal to obtain the receiving frequency of the radar to be tested.
Further, the performing polarization local oscillation processing on the sixth processed signal to obtain a seventh processed signal further includes:
acquiring a third local oscillation signal and a polarization signal provided by a control chip in the test radar;
performing third frequency mixing processing on the sixth processing signal based on the third local oscillator signal to obtain a to-be-processed frequency mixing signal, where a frequency of the to-be-processed frequency mixing signal is the same as a frequency of the transmitting signal, and the frequency of the to-be-processed frequency mixing signal is higher than a frequency of the sixth processing signal;
and performing frequency offset processing on the to-be-processed mixing signal based on the polarization signal to obtain a seventh processed signal.
Further, the performing a first local oscillation process on the amplified signal to obtain a second processed signal further includes:
acquiring a first local oscillation signal provided by a control chip in the test radar;
and performing first frequency mixing processing on the amplified signal based on the first local oscillator signal, and obtaining a second processed signal, wherein the frequency of the second processed signal is lower than that of the amplified signal.
Further, the first preset condition is to judge whether the frequency data of the first processing signal reaches a preset range of an ADC controller in the test radar;
the digital control attenuation processing is carried out on the first processing signal based on a first preset condition to obtain an amplified signal, and the method further comprises the following steps:
judging whether the frequency data of the first processing signal reaches the preset range of an ADC (analog to digital converter) controller in the test radar or not through a control chip of the test radar;
and if the frequency data of the first processing signal reaches a preset range, reducing the frequency of the first processing signal to obtain the amplified signal.
To achieve the above object, an embodiment of the present invention shows a system for detecting radar performance, including:
the receiving module is used for receiving a transmitting signal sent by the radar to be tested through the testing radar;
the filtering module is used for filtering the transmitting signal to obtain a signal to be detected;
the amplification module is used for carrying out first signal amplification processing on the signal to be detected to obtain a first processed signal;
the numerical control attenuation module is used for carrying out numerical control attenuation processing on the first processing signal based on a first preset condition to obtain an amplified signal; wherein the digitally controlled attenuation process is used to reduce the frequency of the first processed signal;
the first local oscillator processing module is used for carrying out first local oscillator processing on the amplified signal to obtain a second processed signal; wherein the first local oscillator processing is configured to reduce a frequency of the amplified signal;
the execution module is used for executing a first processing operation on the second processing signal and obtaining the transmitting power of the radar to be tested through the selection instruction of the test radar, or executing a second processing operation on the second processing signal and obtaining a test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
and the result generation module is used for obtaining the radar performance detection result of the radar to be detected according to the transmitting power and the receiving power of the radar to be detected.
To achieve the above object, an embodiment of the present invention shows a computer device, which includes a memory and a processor, where the memory stores a computer program that is executable on the processor, and the computer program, when executed by the processor, implements the steps of the above radar performance detection method.
To achieve the above object, an embodiment of the present invention shows a computer-readable storage medium, in which a computer program is stored, the computer program being executable by at least one processor to cause the at least one processor to perform the steps of the above-mentioned radar performance detection method.
According to the radar performance detection method, the system, the computer equipment and the readable storage medium provided by the embodiment of the invention, the test radar receives the transmitting signal of the radar to be detected, the transmitting signal is subjected to a series of processing to obtain the transmitting power of the radar to be detected, the transmitting signal of the radar to be detected is converted again and is sent to the radar to be detected, so that the receiving power of the radar to be detected is measured through the test radar, and finally, the performance detection result of the radar to be detected is generated through the transmitting power and the receiving power.
Drawings
Fig. 1 is a schematic diagram of an environmental application of the radar performance detection method of the present invention.
Fig. 2 is a flowchart of an embodiment of a method for detecting radar performance according to the present invention.
Fig. 3 is a flowchart of steps S200 to S202 in the embodiment of the radar performance detection method of the present invention.
Fig. 4 is a flowchart of steps S300 to S303 in an embodiment of the method for detecting radar performance according to the present invention.
Fig. 5 is a flowchart of steps S400 to S408 in an embodiment of the method for detecting radar performance according to the present invention.
Fig. 6 is a flowchart of steps S500 to S502 in an embodiment of the method for detecting radar performance according to the present invention.
Fig. 7 is a flowchart of steps S600 to S608 in the embodiment of the radar performance detection method of the present invention.
Fig. 8 is a flowchart of steps S700 to S704 in an embodiment of a method for detecting radar performance according to the present invention.
Fig. 9 is another flowchart illustrating a method for detecting radar performance according to an embodiment of the present invention.
FIG. 10 is a block diagram of a radar performance detection system according to an embodiment of the present invention.
FIG. 11 is a diagram of a hardware configuration of an embodiment of a computer apparatus according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms most relevant to the subject matter of the invention are explained:
numerical control attenuation: when ADC signal collection is carried out, when the frequency of the measured signal exceeds the measuring range of ADC (Analog to Digital Converter), electronic switches of all stages are controlled by using codes to realize the program control of an attenuator, and the step or superposition of attenuation quantity of the signal is realized according to requirements.
A first local oscillator and a second local oscillator: the carrier frequency used for the first frequency mixing is the first local oscillator, and the carrier frequency used for the second frequency mixing is the second local oscillator. Mixing refers to a process of mixing two signals with different frequencies and obtaining a signal with a third frequency through a frequency selection loop, wherein one signal is a local oscillator signal.
Polarization local oscillation: the method comprises the steps of polarization and local oscillator processing, wherein the signals are subjected to frequency mixing through local oscillator signals, and then the signals subjected to frequency mixing are subjected to polarization, wherein the polarization refers to the frequency deviation of the signals subjected to frequency mixing.
The preset first signal frequency range: in digital communications it is common to refer to bandwidths of signals below 64 kbit/s.
The preset second signal frequency range: wide bandwidth, in digital communications, typically refers to the bandwidth of signals above 64 kbit/s.
The inventors have appreciated that: the existing radar calibrator has at least the following defects:
(1) the existing radar calibrator has long test time, and the measurement time of a single radar to be measured is about one minute.
(2) The existing radar calibrator has high requirements on a test environment, and in order to prevent interference, wedges are required to be added around the test environment.
(3) The equipment of current radar calibrator occupies the place greatly, and the place that occupies of radar calibrator needs 5 to 6 square meters.
(4) The existing radar calibrator measures roughly, cannot accurately measure the transmitting power and the receiving power of a radar to be measured, can only measure the overall power of the radar, and cannot test frequency points.
To solve the above problem, a plurality of embodiments will be provided below, and the embodiments provided below can be used to realize detection of radar performance.
Fig. 1 schematically shows an environment application diagram of a radar performance detection method according to an embodiment of the present application. In an exemplary embodiment, the environment application diagram includes a radar under test 10 and a radar under test 20; the radar under test 10 includes a first receiving antenna and a first transmitting antenna, and the test radar 20 includes a second receiving antenna and a second transmitting antenna. The second receiving antenna receives the transmission signal transmitted by the first transmitting antenna, and the first receiving antenna receives a feedback signal based on the transmission signal from the second transmitting antenna. Each antenna comprises a radio frequency interface for receiving and transmitting electromagnetic wave signals; the radio frequency interface is provided with a duplexer, the duplexer is used for isolating transmitted and received electromagnetic wave signals and ensuring that the receiving and the transmitting can work normally at the same time, and the duplexer consists of two groups of band-pass filters with different frequencies and prevents the transmission signal of the local machine from being transmitted to a receiver of the local machine.
This application aims at providing a detection scheme of radar performance, in this scheme:
(1) the performance of the radar to be tested is detected through the test radar, so that the measured data is more accurate.
(1) The MCU is arranged on the test radar to control the test radar to process signals, so that the occupied area is reduced, and the equipment is smaller and more stable.
(3) The communication between the radars is fast, and the efficiency of performance detection is improved.
Referring to fig. 2, a flow chart of steps of a method for detecting radar performance according to an embodiment of the present invention is shown. It is to be understood that the flow charts in the embodiments of the present method are not intended to limit the order in which the steps are performed. The following exemplary description is provided, in particular, as follows.
And S100, receiving a transmitting signal sent by the radar to be tested through the testing radar.
Specifically, a radio frequency interface of the test radar receives a transmission signal sent by the radar to be tested, and the transmission signal is an electromagnetic wave signal.
And S102, filtering the emission signal to obtain a signal to be detected.
In order to ensure the accuracy of the signal, the unnecessary electromagnetic wave signals in the transmission signal need to be filtered, and the transmission signal is transmitted to the band-pass filter through the duplexer to be filtered, so as to obtain the signal to be detected.
And S104, performing first signal amplification processing on the signal to be detected to obtain a first processed signal.
Because the frequency of the signal to be detected is possibly low, the subsequent signal processing is not facilitated, and the signal to be detected is amplified through the amplifier to obtain a first processed signal.
Step S106, carrying out numerical control attenuation processing on the first processed signal based on a first preset condition to obtain an amplified signal; wherein the digitally controlled attenuation process is used to reduce the frequency of the first processed signal.
In an exemplary embodiment, the first preset condition is to determine whether the frequency data of the first processing signal reaches a preset range of an ADC controller in the test radar;
referring to fig. 3, the step S106 further includes:
and S200, judging whether the frequency data of the first processing signal reaches the preset range of an ADC (analog to digital converter) controller in the test radar or not through a control chip of the test radar. Step S202, if the frequency data of the first processing signal reaches a preset range, reducing the frequency of the first processing signal to obtain the amplified signal.
To prevent oversaturation of the amplified first processed signal, the first processed signal is reduced by a digitally controlled attenuation process. The control chip of the test radar is an MCU (micro controller Unit, micro control Unit or single chip microcomputer), program codes for carrying out numerical control attenuation are arranged on the MCU, and the MCU controls the numerical control attenuator to realize numerical control attenuation processing on signals to be detected according to the program codes. The judgment of supersaturation is: when the MCU chip collects the ADC signal, whether the ADC is in a full scale or not is confirmed, if the full scale is over-saturated, the MCU chip controls the numerical control attenuator to attenuate the signal to be detected to an unsaturated state, namely, the frequency of the first processing signal is reduced, and the amplified signal is obtained.
Step S108, carrying out first local oscillation processing on the amplified signal to obtain a second processed signal; wherein the first local oscillator process is configured to reduce a frequency of the amplified signal.
In order to improve the stability of the amplified signal, a first local oscillation process is performed on the amplified signal. The first processing is performed on the amplified signal, that is, a local oscillator signal is generated and mixed with the amplified signal to generate a signal with a fixed frequency, which is a second processed signal.
In an exemplary embodiment, referring to fig. 4, the step S108 further includes:
and step S300, acquiring a first local oscillation signal provided by a control chip in the test radar. Step S302, perform a first frequency mixing process on the amplified signal based on the first local oscillator signal, and obtain the second processed signal, where a frequency of the second processed signal is lower than a frequency of the amplified signal.
In order to reduce the carrier frequency of the signal and improve the stability of the amplified signal, the amplified signal is subjected to down-conversion processing through the first local oscillator signal, that is, the first local oscillator signal and the amplification information are subjected to frequency mixing processing, so that a second processed signal with the frequency smaller than that of the amplified signal is obtained.
Step S110, through the selection instruction of the test radar, performing a first processing operation on the second processing signal and obtaining the transmitting power of the radar to be tested, or performing a second processing operation on the second processing signal and obtaining a test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal.
In order to improve the efficiency of the test, a switch is arranged on the test radar to control whether the measurement of the transmitting power or the measurement of the receiving gain is carried out.
In an exemplary embodiment, the selection instruction includes a first selection instruction, where the first selection instruction is used to instruct to perform the first processing operation on the second processing signal and obtain the transmission power of the radar to be detected;
referring to fig. 5, the step S110 further includes:
step S400, the second processed signal is screened according to a preset first signal frequency range, and a third processed signal is obtained, where the third processed signal is a signal whose frequency is within the preset first signal frequency range. Step S402, performing a second local oscillation process on the third processed signal to obtain a fourth processed signal, where the second local oscillation process is used to reduce the frequency of the third processed signal. And S404, performing second signal amplification processing on the fourth processed signal to obtain a fifth processed signal. Step S406, performing intermediate frequency filtering on the fifth processed signal to obtain an intermediate frequency signal. And step S408, performing signal processing on the intermediate frequency signal to obtain the transmitting power of the radar to be detected.
Specifically, in order to better measure the transmission power, the transmission power of the radar to be measured is measured through steps S400 to S408. Performing narrow band pass filtering, second local oscillation, amplification and intermediate frequency filtering processing on the second processed signal to obtain a stable intermediate frequency signal; then, transmitting the intermediate frequency signal to an MUC chip through an intermediate frequency interface; and finally, performing signal processing on the intermediate-frequency signal through the MCU chip to obtain the transmitting power. The third processing signal is a signal after narrow band pass filtering, the preset first signal frequency range is in the preset narrow bandwidth range, and the narrow bandwidth range can be set by self-definition. And filtering out the unwanted signals through narrow bandwidth filtering, performing two local oscillator processing, performing down-conversion on the third processed signals to fourth processed signals of the frequency which can be acquired by the MCU, and amplifying the frequency of the fourth processed signals to the signals of the frequency acquired by the ADC of the MCU. And finally, in order to improve the anti-interference performance and the precision of the measured frequency, performing intermediate frequency filtering on the fifth processed signal to obtain an intermediate frequency signal with better stability, transmitting the intermediate frequency signal to the MCU through the intermediate frequency interface, and performing signal processing on the intermediate frequency signal through the MCU to obtain the transmitting power of the radar to be measured.
In an exemplary embodiment, referring to fig. 6, the pair of steps S402 further includes:
and S500, acquiring a second local oscillation signal provided by a control chip in the test radar. Step S502, performing a second frequency mixing process on the third processed signal based on the second local oscillator signal, and obtaining a fourth processed signal, where a frequency of the fourth processed signal is lower than a frequency of the third processed signal.
In order to obtain a signal that can be acquired by the ADC, second local oscillation processing, that is, second frequency mixing processing, is performed on the third processed signal to obtain a fourth processed signal.
In an exemplary embodiment, the selection instruction includes a second selection instruction, where the second selection instruction is used to instruct to perform the second processing operation on the second processing signal and obtain the test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
referring to fig. 7, the step S110 further includes:
s600, screening the second processing signal according to a preset second signal frequency range to obtain a sixth processing signal; and the sixth processing signal is a signal with a frequency within the preset second signal frequency range. Step S602, performing a polarization local oscillation process on the sixth processed signal to obtain a seventh processed signal, where the polarization local oscillation is used to increase the frequency of the sixth processed signal. And step S604, performing third signal amplification processing on the seventh processed signal to obtain an eighth processed signal. Step S606, filtering the eighth processed signal to obtain the test signal. Step S608, transmitting the test signal to the radar to be tested through the test radar, so that the radar to be tested: and receiving the test signal, and analyzing the test signal to obtain the receiving frequency of the radar to be tested.
Specifically, in order to better measure the received power, the transmission power of the radar to be measured is measured through steps S600 to S608. Carrying out wide band-pass filtering, polarization local oscillation, amplification and band-pass filtering on the second processing signal to obtain a test signal; transmitting the test signal to the radar to be tested through the transmitting antenna of the test radar; and finally, calculating the receiving power of the test signal through the radar to be tested. The sixth processing signal is a signal subjected to wide bandwidth filtering, a preset second signal frequency range is within a preset wide bandwidth range, and the wide bandwidth range can be set in a user-defined mode.
In an exemplary embodiment, referring to fig. 8, the step S602 further includes:
and S700, acquiring a third local oscillation signal and a polarization signal provided by a control chip in the test radar. Step S702, performing, based on the third local oscillator signal, third frequency mixing processing on the sixth processed signal to obtain a to-be-processed frequency-mixed signal, where a frequency of the to-be-processed frequency-mixed signal is the same as a frequency of the transmit signal, and a frequency of the to-be-processed frequency-mixed signal is higher than a frequency of the sixth processed signal. Step S704, performing frequency offset processing on the to-be-processed mixed signal based on the polarization signal to obtain the seventh processed signal.
In order to make the tested receiving power more accurate, the frequency of the mixing signal to be processed is restored to be the same as the frequency of the transmitting signal through polarization local oscillator processing. Since the sixth processed signal is processed by the first local oscillator, the first local oscillator is processed by down-conversion, and if the frequency of the signal is to be restored, the third local oscillator is processed by up-conversion. In order to prevent the third local oscillation process from causing unstable local oscillation process due to too small voltage, the mixed signal to be processed is subjected to polarization process, and the polarized signal subjected to polarization process is preferably 30HZ (hertz).
And S112, obtaining a radar performance detection result of the radar to be detected according to the transmitting power and the receiving power of the radar to be detected.
The radar performance detection result comprises: the radar detection method comprises the steps of transmitting power (transmitting gain), receiving power (receiving gain) and frequency of a radar to be detected, wherein the transmitting gain is the signal intensity of a signal transmitted by the radar to be detected, the receiving gain is the signal intensity of the signal received by the radar to be detected, and the frequency can be obtained by calculation according to the transmitting power and the receiving power. And acquiring a standard result of the radar to be detected, and comparing the standard result with a radar performance detection result, thereby obtaining a quality result of the radar to be detected and ensuring the accuracy of radar performance detection.
To facilitate understanding of the signal processing process, please refer to fig. 9, which is an overall flow of signal processing;
the method comprises the steps of receiving a transmitting signal transmitted by a radar to be tested through a radio frequency interface of the testing radar, and transmitting the transmitting signal to a branch circuit for processing the received signal by the testing radar based on a duplexer of the radio frequency interface. Namely, the emission signal is subjected to first band-pass processing, the first band-pass processing is filtering processing, and redundant electromagnetic waves outside are filtered to obtain a signal to be detected. And carrying out first amplification processing on the signal to be detected, and amplifying the signal to be detected to obtain a first processed signal. And reducing the first processing signal through numerical control attenuation processing to obtain an amplified signal because the amplified first processing signal is possibly oversaturated. And carrying out first local oscillator frequency mixing processing on the amplified signal, and carrying out down conversion on the high-frequency signal, namely carrying out down conversion processing on the amplified signal. And judging a control switch through an MCU on the test radar so as to control whether to execute a first processing operation on the second processing signal and obtain the transmitting power of the radar to be tested, or execute a second processing operation on the second processing signal and obtain a test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal.
When the first processing operation is executed on the second processing signal and the transmitting power of the radar to be detected is obtained; and carrying out narrow-broadband filtering processing on the first processed signal, and filtering out the unwanted signal to obtain a third processed signal. And processing the third processing information by a second local oscillator, and performing down-conversion on the frequency of the third processing signal to the frequency which can be acquired by the MCU to obtain a fourth processing signal. And filtering and amplifying the fourth processing signal to the frequency acquired by the MCU through the ADC to obtain a fifth processing signal. And finally, carrying out intermediate frequency filtering processing on the fifth processing signal to obtain an intermediate frequency signal, transmitting the intermediate frequency signal to the MCU through the intermediate frequency interface for ADC acquisition, and carrying out corresponding signal processing to obtain the transmitting power of the radar to be detected.
When second processing operation is executed on a second processing signal and a test signal is obtained, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal; carrying out up-conversion polarization local oscillation processing on the second processing signal, restoring the frequency of the second processing signal to the frequency of the received transmitting signal, and simultaneously carrying out frequency offset of 30HZ (hertz) to obtain a seventh processing signal; performing second amplification processing on the seventh processed signal to obtain an eighth processed signal; finally, the eighth processing signal is subjected to second-time band-pass filtering to obtain a new test signal, and the test signal is transmitted to the radio frequency interface through the duplexer and then transmitted to the radar to be tested; and measuring the intermediate frequency signal in the test signal at the radar to be tested, thereby obtaining the receiving power of the radar to be tested.
Finally, the frequency of the radar to be tested is solved through the receiving power and the transmitting power of the radar to be tested; and comparing the receiving power, the transmitting power and the frequency of the radar to be tested with those of the standard radar to obtain a radar performance detection result of the radar to be tested.
Continuing to refer to FIG. 10, a schematic diagram of the program modules of the radar performance detection system of the present invention is shown. In this embodiment, the system 80 for detecting radar performance may include or be divided into one or more program modules, and the one or more program modules are stored in a storage medium and executed by one or more processors to implement the present invention and implement the method for detecting radar performance described above. The program modules referred to in the embodiments of the present invention refer to a series of computer program instruction segments that can perform specific functions, and are more suitable than the program itself for describing the execution process of the detection system 80 of radar performance in the storage medium. The following description will specifically describe the functions of the program modules of the present embodiment:
the receiving module 800 is configured to receive a transmission signal sent by a radar to be tested through a test radar.
And a filtering module 802, configured to perform filtering processing on the transmission signal to obtain a signal to be detected.
The amplifying module 804 is configured to perform first signal amplification processing on the signal to be detected to obtain a first processed signal.
A numerical control attenuation module 806, configured to perform numerical control attenuation processing on the first processed signal based on a first preset condition to obtain an amplified signal; wherein the digitally controlled attenuation process is used to reduce the frequency of the first processed signal.
In an exemplary embodiment, the first preset condition is to determine whether the frequency data of the first processing signal reaches a preset range of an ADC controller in the test radar;
the digitally controlled attenuation module 806 is further configured to:
judging whether the frequency data of the first processing signal reaches the preset range of an ADC (analog to digital converter) controller in the test radar or not through a control chip of the test radar; and if the frequency data of the first processing signal reaches a preset range, reducing the frequency of the first processing signal to obtain the amplified signal.
A first local oscillator processing module 808, configured to perform first local oscillator processing on the amplified signal to obtain a second processed signal; wherein the first local oscillator process is configured to reduce a frequency of the amplified signal.
In an exemplary embodiment, the first local oscillator processing module 808 is further configured to:
acquiring a first local oscillation signal provided by a control chip in the test radar; and performing first frequency mixing processing on the amplified signal based on the first local oscillator signal, and obtaining a second processed signal, wherein the frequency of the second processed signal is lower than that of the amplified signal.
And the execution module 810 is configured to execute a first processing operation on the second processing signal and obtain the transmitting power of the radar to be tested through the selection instruction of the test radar, or execute a second processing operation on the second processing signal and obtain a test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal.
In an exemplary embodiment, the selection instruction includes a first selection instruction, where the first selection instruction is used to instruct to perform the first processing operation on the second processing signal and obtain the transmission power of the radar to be detected;
the execution module 810 is further configured to:
screening the second processed signal according to a preset first signal frequency range, and obtaining a third processed signal, wherein the third processed signal is a signal with the frequency within the preset first signal frequency range; performing second local oscillation processing on the third processed signal to obtain a fourth processed signal, wherein the second local oscillation processing is used for reducing the frequency of the third processed signal; performing second signal amplification processing on the fourth processed signal to obtain a fifth processed signal; performing intermediate frequency filtering on the fifth processed signal to obtain an intermediate frequency signal; and processing the intermediate frequency signal to obtain the transmitting power of the radar to be detected.
In an exemplary embodiment, the execution module 810 is further configured to:
acquiring a second local oscillation signal provided by a control chip in the test radar; and performing second frequency mixing processing on the third processed signal based on the second local oscillator signal, and obtaining a fourth processed signal, wherein the frequency of the fourth processed signal is lower than that of the third processed signal.
In an exemplary embodiment, the selection instruction includes a second selection instruction, where the second selection instruction is used to instruct to perform the second processing operation on the second processing signal and obtain the test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
the execution module 810 is further configured to:
screening the second processing signal according to a preset second signal frequency range to obtain a sixth processing signal; wherein the sixth processing signal is a signal whose frequency is within the preset second signal frequency range; carrying out polarization local oscillation processing on the sixth processing signal to obtain a seventh processing signal, wherein the polarization local oscillation is used for increasing the frequency of the sixth processing signal; performing third signal amplification processing on the seventh processed signal to obtain an eighth processed signal; filtering the eighth processing signal to obtain the test signal; transmitting the test signal to the radar to be tested through the test radar so that the radar to be tested: and receiving the test signal, and analyzing the test signal to obtain the receiving frequency of the radar to be tested.
In an exemplary embodiment, the execution module 810 is further configured to:
acquiring a third local oscillation signal and a polarization signal provided by a control chip in the test radar; performing third frequency mixing processing on the sixth processing signal based on the third local oscillator signal to obtain a to-be-processed frequency mixing signal, where a frequency of the to-be-processed frequency mixing signal is the same as a frequency of the transmitting signal, and the frequency of the to-be-processed frequency mixing signal is higher than a frequency of the sixth processing signal; and performing frequency offset processing on the to-be-processed mixing signal based on the polarization signal to obtain a seventh processed signal.
And a result generating module 812, configured to obtain a radar performance detection result of the radar to be detected according to the transmitting power and the receiving power of the radar to be detected.
Fig. 11 is a schematic diagram of a hardware architecture of a computer device according to an embodiment of the present invention. In this embodiment, the computer device 8 is a device capable of automatically performing numerical calculation and/or information processing according to a preset or stored instruction. The computer device 8 may be a rack server, a blade server, a tower server or a rack server (including an independent server or a server cluster composed of a plurality of servers), and the like. As shown in fig. 11, the computer device 8 includes, but is not limited to, at least a memory 81, a processor 82, a network interface 83, and a radar performance detection system 80, which are communicatively connected to each other via a system bus. Wherein:
in this embodiment, the memory 81 includes at least one type of computer-readable storage medium including a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. In some embodiments, the storage 81 may be an internal storage unit of the computer device 8, such as a hard disk or a memory of the computer device 8. In other embodiments, the memory 81 may be an external storage device of the computer device 8, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like provided on the computer device 8. Of course, the memory 81 may also include both internal and external storage devices of the computer device 8. In this embodiment, the memory 81 is generally used for storing an operating system installed in the computer device 8 and various types of application software, such as the program codes of the radar performance detection system 80 of the second embodiment. Further, the memory 81 may also be used to temporarily store various types of data that have been output or are to be output.
The network interface 83 may include a wireless network interface or a wired network interface, and the network interface 23 is generally used for establishing communication connection between the server 2 and other electronic devices. For example, the network interface 83 is used to connect the server 8 to an external terminal via a network, establish a data transmission channel and a communication connection between the server 2 and the external terminal, and the like. The network may be a wireless or wired network such as an Intranet (Intranet), the Internet (Internet), a Global System of Mobile communication (GSM), Wideband Code Division Multiple Access (WCDMA), a 4G network, a 5G network, Bluetooth (Bluetooth), Wi-Fi, and the like.
It is noted that fig. 11 only shows the computer device 8 with components 80-83, but it is to be understood that not all of the shown components are required to be implemented, and that more or fewer components may be implemented instead.
In this embodiment, the radar performance detection system 80 stored in the memory 81 may be further divided into one or more program modules, and the one or more program modules are stored in the memory 21 and executed by one or more processors (in this embodiment, the processor 82) to complete the present invention.
The present embodiment also provides a computer-readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application mall, etc., on which a computer program is stored, which when executed by a processor implements corresponding functions. The computer-readable storage medium of the present embodiment is used for a computer program, and when executed by a processor, implements the radar performance detection method of the above-described embodiment.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of detecting radar performance, the method comprising:
receiving a transmitting signal sent by a radar to be tested through a testing radar;
filtering the emission signal to obtain a signal to be detected;
performing first signal amplification processing on the signal to be detected to obtain a first processed signal;
carrying out numerical control attenuation processing on the first processing signal based on a first preset condition to obtain an amplified signal; wherein the digitally controlled attenuation process is used to reduce the frequency of the first processed signal;
performing first local oscillation processing on the amplified signal to obtain a second processed signal; wherein the first local oscillator processing is configured to reduce a frequency of the amplified signal;
executing a first processing operation on the second processing signal and obtaining the transmitting power of the radar to be tested through the selection instruction of the test radar, or executing a second processing operation on the second processing signal and obtaining a test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
and obtaining a radar performance detection result of the radar to be detected according to the transmitting power and the receiving power of the radar to be detected.
2. The method according to claim 1, wherein the selection instruction includes a first selection instruction, and the first selection instruction is used to instruct the second processing signal to perform the first processing operation and obtain the transmission power of the radar to be detected;
the executing the first processing operation on the second processing signal and obtaining the transmitting power of the radar to be detected further includes:
screening the second processed signal according to a preset first signal frequency range, and obtaining a third processed signal, wherein the third processed signal is a signal with the frequency within the preset first signal frequency range;
performing second local oscillation processing on the third processed signal to obtain a fourth processed signal, wherein the second local oscillation processing is used for reducing the frequency of the third processed signal;
performing second signal amplification processing on the fourth processed signal to obtain a fifth processed signal;
performing intermediate frequency filtering on the fifth processed signal to obtain an intermediate frequency signal;
and processing the intermediate frequency signal to obtain the transmitting power of the radar to be detected.
3. The method according to claim 2, wherein the performing a second local oscillation process on the third processed signal to obtain a fourth processed signal further includes:
acquiring a second local oscillation signal provided by a control chip in the test radar;
and performing second frequency mixing processing on the third processed signal based on the second local oscillator signal, and obtaining a fourth processed signal, wherein the frequency of the fourth processed signal is lower than that of the third processed signal.
4. The method according to claim 1, wherein the selection instruction includes a second selection instruction, and the second selection instruction is used to instruct the second processing operation to be performed on the second processed signal and obtain the test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
the executing the second processing operation on the second processed signal and obtaining the test signal so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal further includes:
screening the second processing signal according to a preset second signal frequency range to obtain a sixth processing signal; wherein the sixth processing signal is a signal whose frequency is within the preset second signal frequency range;
carrying out polarization local oscillation processing on the sixth processing signal to obtain a seventh processing signal, wherein the polarization local oscillation is used for increasing the frequency of the sixth processing signal;
performing third signal amplification processing on the seventh processed signal to obtain an eighth processed signal;
filtering the eighth processing signal to obtain the test signal;
transmitting the test signal to the radar to be tested through the test radar so that the radar to be tested: and receiving the test signal, and analyzing the test signal to obtain the receiving frequency of the radar to be tested.
5. The method according to claim 4, wherein the performing a polarization local oscillation process on the sixth processed signal to obtain a seventh processed signal further includes:
acquiring a third local oscillation signal and a polarization signal provided by a control chip in the test radar;
performing third frequency mixing processing on the sixth processing signal based on the third local oscillator signal to obtain a to-be-processed frequency mixing signal, where a frequency of the to-be-processed frequency mixing signal is the same as a frequency of the transmitting signal, and the frequency of the to-be-processed frequency mixing signal is higher than a frequency of the sixth processing signal;
and performing frequency offset processing on the to-be-processed mixing signal based on the polarization signal to obtain a seventh processed signal.
6. The method according to claim 1, wherein the performing a first local oscillation process on the amplified signal to obtain a second processed signal further includes:
acquiring a first local oscillation signal provided by a control chip in the test radar;
and performing first frequency mixing processing on the amplified signal based on the first local oscillator signal, and obtaining a second processed signal, wherein the frequency of the second processed signal is lower than that of the amplified signal.
7. The method of claim 1, wherein the first predetermined condition is determining whether the frequency data of the first processed signal reaches a predetermined range of an ADC controller in the test radar;
the digital control attenuation processing is carried out on the first processing signal based on a first preset condition to obtain an amplified signal, and the method further comprises the following steps:
judging whether the frequency data of the first processing signal reaches the preset range of an ADC (analog to digital converter) controller in the test radar or not through a control chip of the test radar;
and if the frequency data of the first processing signal reaches a preset range, reducing the frequency of the first processing signal to obtain the amplified signal.
8. A system for detecting radar performance, comprising:
the receiving module is used for receiving a transmitting signal sent by the radar to be tested through the testing radar;
the filtering module is used for filtering the transmitting signal to obtain a signal to be detected;
the amplification module is used for carrying out first signal amplification processing on the signal to be detected to obtain a first processed signal;
the numerical control attenuation module is used for carrying out numerical control attenuation processing on the first processing signal based on a first preset condition to obtain an amplified signal; wherein the digitally controlled attenuation process is used to reduce the frequency of the first processed signal;
the first local oscillator processing module is used for carrying out first local oscillator processing on the amplified signal to obtain a second processed signal; wherein the first local oscillator processing is configured to reduce a frequency of the amplified signal;
the execution module is used for executing a first processing operation on the second processing signal and obtaining the transmitting power of the radar to be tested through the selection instruction of the test radar, or executing a second processing operation on the second processing signal and obtaining a test signal, so that the radar to be tested obtains the receiving power of the radar to be tested according to the test signal;
and the result generation module is used for obtaining the radar performance detection result of the radar to be detected according to the transmitting power and the receiving power of the radar to be detected.
9. A computer arrangement, characterized in that the computer arrangement comprises a memory, a processor, the memory having stored thereon a computer program being executable on the processor, the computer program, when being executed by the processor, realizing the steps of the method of detection of radar performance according to any one of claims 1-7.
10. A computer-readable storage medium, in which a computer program is stored which is executable by at least one processor to cause the at least one processor to perform the steps of the method of detection of radar performance according to any one of claims 1 to 7.
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| CN117289235B (en) * | 2023-11-24 | 2024-01-30 | 成都凌亚科技有限公司 | Antenna radar multichannel signal acquisition processing equipment and method |
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