CN109917341B - Radar moving target tracking performance test method, terminal equipment and storage medium - Google Patents
Radar moving target tracking performance test method, terminal equipment and storage medium Download PDFInfo
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Abstract
The application is applicable to the technical field of radar testing, and provides a radar moving target tracking performance testing method, terminal equipment and a storage medium, wherein the method comprises the following steps: sending an echo signal for testing the tracking performance of a radar moving target to a tested radar; acquiring first track data calculated by a detected radar according to an echo signal; comparing the first track data with the pre-stored second track data; and judging whether the tested radar passes the test or not according to the comparison result. According to the radar moving target tracking performance test method, the terminal device and the storage medium, when the radar moving target tracking performance is tested, fixed echo signals are used, so that the reliability and accuracy of the test are improved, and the problem that the reliability and accuracy of the test are low when the radar moving target tracking performance is tested at present is solved.
Description
Technical Field
The application belongs to the technical field of radar testing, and particularly relates to a radar moving target tracking performance testing method, terminal equipment and a storage medium.
Background
The moving target tracking performance is one of key performance indexes of the radar equipment. Currently, when testing the tracking performance of a moving target of a radar, a radar to be tested needs to be arranged in the outdoor space, and the moving target, such as an automobile, moves towards the radar to be tested along a preset track and at a preset speed, so that the radar to be tested receives an echo signal reflected by the moving target, and track information such as the distance and the speed of the moving target is calculated from the echo signal. Because the outdoor environment is changeable, different weather conditions, such as wind speed and wind direction, can affect the test to different degrees, thereby reducing the reliability and accuracy of the test. In addition, during each test, since it is difficult to ensure that the moving target can move strictly according to the preset track and speed, the reliability and accuracy of the test are also reduced.
Disclosure of Invention
In view of this, embodiments of the present application provide a method for testing radar moving target tracking performance, a terminal device, and a storage medium, so as to solve the problem that the test reliability and accuracy are low when a radar moving target tracking performance test is performed at present.
According to a first aspect, an embodiment of the present application provides a method for testing radar moving target tracking performance, including: sending an echo signal for testing the tracking performance of a radar moving target to a tested radar; acquiring first track data calculated by the detected radar according to the echo signal; comparing the first track data with pre-stored second track data; and judging whether the tested radar passes the test or not according to the comparison result.
According to the method for testing the tracking performance of the moving target of the radar, the tracking performance of the moving target of the radar is tested by using the uniform echo signal, and the problem that the existing testing method is easily influenced by environment and weather can be solved; meanwhile, the problem that in the existing testing method, the moving target for testing cannot be strictly tested according to the preset track and speed in each testing process is solved. When the moving target tracking performance of the radar is tested, fixed echo signals are used, so that the reliability and accuracy of the test are improved, and the problem that the reliability and accuracy of the test are lower when the moving target tracking performance of the radar is tested at present is solved.
With reference to the first aspect, in a first implementation manner of the first aspect, before the sending, to the radar under test, an echo signal for testing the tracking performance of the radar moving target, the method for testing the tracking performance of the radar moving target further includes: and acquiring the second track data.
According to the method for testing the tracking performance of the radar moving target, before the radar equipment to be tested is tested, the second track data used for judging the tracking performance of the moving target is prestored, so that after the radar equipment to be tested resolves the corresponding actual measurement track data according to the echo signal, namely the first track data, the radar equipment to be tested can identify whether the radar equipment to be tested has the expected tracking performance of the moving target or not by comparing the mode that whether the first track data is consistent with the second track data or not.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the acquiring the second track data includes: acquiring parameter information of the radar to be detected and motion information of a moving target; and calculating the second track data according to the parameter information and the motion information.
According to the radar moving target tracking performance testing method provided by the embodiment of the application, according to the radar detection principle, the corresponding theoretical track data, namely the second track data, is obtained through calculation according to the parameter information of the radar to be tested and the movement information of the moving target, so that a basis is provided for judging whether the radar to be tested passes the test in the subsequent steps.
With reference to the second embodiment of the first aspect, in a third embodiment of the first aspect, the parameter information includes a pulse repetition period, a radar signal wavelength, and a chirp rate of the radar under test; the motion information comprises the speed and the starting distance of the moving target; by q ″)i＝sin(2πf0t + (i-1) Δ φ) calculating the second track data; wherein, q ″)iSecond track data corresponding to the ith pulse in a first radar signal sent by the radar to be detected is represented;
delta phi represents the phase increment between adjacent pulses in a first radar signal sent by the radar to be detected;
f0representing the frequency of an intermediate frequency signal in a first radar signal emitted by the radar to be detected; t iscRepresenting a pulse repetition period of the radar under test; λ represents a first radar signal wavelength emitted by the radar under test; sτThe chirp rate of a first radar signal emitted by the radar to be detected is represented; v represents the velocity of the moving object; d represents the moving object and the starting distance; and c represents the speed of light.
The method for testing the tracking performance of the radar moving target provided by the embodiment of the application provides a specific formula for calculating theoretical track data, namely second track data. The formula is used for quickly and accurately calculating to obtain the second track data, so that a basis is provided for judging whether the detected radar passes the test or not in the subsequent steps.
With reference to the first aspect, in a fourth implementation manner of the first aspect, before the sending, to the radar under test, an echo signal for testing the tracking performance of the radar moving target, the method for testing the tracking performance of the radar moving target further includes: and acquiring the echo signal.
According to the method for testing the tracking performance of the radar moving target, before the radar equipment to be tested is tested, the echo signal for testing the tracking performance of the moving target is prestored, so that the radar equipment to be tested can receive and work out corresponding actual measurement track data, namely first track data, according to the echo signal, and whether the radar equipment to be tested has the expected tracking performance of the moving target is identified by using the first track data in the subsequent steps.
With reference to the fourth implementation manner of the first aspect, in the fifth implementation manner of the first aspect, the acquiring the echo signal includes: sending a second radar signal to a moving target moving along a preset track; the values of all parameters of the second radar signal are respectively the same as the values of all parameters of the first radar signal sent by the radar to be detected; and receiving the echo signal reflected by the moving target.
According to the method for testing the tracking performance of the radar moving target, a first radar signal sent by a tested radar is simulated, a second radar signal corresponding to the first radar signal is generated, the second radar signal is utilized to detect the moving target moving along a preset track, and therefore an echo signal generated by the moving target in the detection process of the second radar signal is received, the echo signal corresponds to the first radar signal sent by the tested radar and the moving target moving along the preset track at the same time, and the echo signal can be applied to testing of any radar with the same parameters as the tested radar.
With reference to the fifth implementation manner of the first aspect, in a sixth implementation manner of the first aspect, a value of a chirp rate in the second radar signal is half a value of a chirp rate in the first radar signal.
According to the radar moving target tracking performance testing method provided by the embodiment of the application, the frequency modulation slope in the second radar signal is set to be half of the frequency modulation slope in the first radar signal, so that the frequency error caused by different radar erection modes when the echo signal is recorded and played back in the moving target tracking performance testing process of the tested radar equipment can be offset.
According to a second aspect, an embodiment of the present application provides a terminal device, including: the echo signal sending unit is used for sending an echo signal for testing the tracking performance of a radar moving target to the radar to be tested; the comparison unit is used for acquiring first track data calculated by the detected radar according to the echo signal; the first track data and the second track data are compared; and the judging unit is used for judging whether the tested radar passes the test or not according to the comparison result.
According to a third aspect, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method according to the first aspect or any embodiment of the first aspect when executing the computer program.
According to a fourth aspect, embodiments of the present application provide a computer-readable storage medium, which stores a computer program, which when executed by a processor implements the steps of the method according to the first aspect or any of the embodiments of the first aspect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application;
fig. 2 is a schematic implementation flow diagram of a specific example of a method for testing tracking performance of a moving target of a radar according to an embodiment of the present application;
fig. 3 is a schematic implementation flowchart of another specific example of a method for testing radar moving target tracking performance according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a specific example of a terminal device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another specific example of the terminal device according to the embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Fig. 1 is a schematic view of an application scenario in an embodiment of the present application. As shown in fig. 1, when a moving object tracking performance test is performed on the radar under test 100, a test signal may be transmitted to the radar under test 100 through the test apparatus 200, so that after the radar under test 100 responds to the test signal, the moving object tracking performance is evaluated according to the data of the response.
In some embodiments, as shown in fig. 2, the testing apparatus 200 may implement the moving object tracking performance test on the radar under test 100 by the following steps:
step S101: and sending an echo signal for testing the tracking performance of the radar moving target to the radar to be tested. In practical applications, the echo signal may be recorded in advance and used as a test signal, and when the radar under test 100 is tested, the echo signal may be transmitted to the radar under test 100 through the test apparatus 200.
Step S102: and acquiring first track data calculated by the detected radar according to the echo signal. After receiving the echo signal sent by the testing apparatus 200, the tested radar 100 may resolve the echo signal, so as to generate measured flight path data, that is, first flight path data. Because different radars 100 to be detected have specific internal structures and carry specific radar detection algorithm programs, different radars 100 to be detected may make different differentiated responses to the same echo signal, so as to generate different first track data, and thus, the first track data can reflect certain performance characteristics of the radars to be detected 100, for example, the specific performance of the radars to be detected 100 in terms of moving target tracking.
Step S103: and comparing the first track data with the pre-stored second track data. In practical applications, the second track data may be theoretical track data calculated according to a radar detection principle. By comparing the actual measurement track data and the theoretical track data output by the radar 100 to be detected, namely comparing the first track data and the second track data, the specific performance of the radar 100 to be detected in the aspect of tracking the moving target can be judged.
Step S104: and judging whether the tested radar passes the test or not according to the comparison result. In one embodiment, the corresponding first track data generated by the radar under test 100 according to each pulse signal in the echo signal and the second track data corresponding to the pulse signal may be compared one by one. When each first track data is the same as, or similar to, the corresponding second track data, the tested radar 100 may be considered to pass the test. Specifically, a threshold may be preset, and when the variance between any first track data and its corresponding second track data is within the threshold, the first track data may be considered to be in accordance with the expected moving object tracking performance. After the variance between each first track data and the corresponding second track data is obtained through calculation, the number of the first track data which accord with the expected moving target tracking performance and the total number of pulse signals in echo signals can be further counted, so that the percentage which accord with the expected moving target tracking performance in all the first track data obtained through testing is calculated, and finally, the final result of whether the tested radar 100 passes the testing or not can be given according to the percentage.
It should be noted that, according to actual needs, a user may select other indexes capable of reflecting the difference between the first track data and the second track data to replace the variance described above, which is not limited in this embodiment of the present application. In addition, because the echo signals, the first track data and the second track data are respectively in pairwise corresponding relationship, the total number of the pulse signals in the echo signals is equal to the total number of the first track data and the second track data.
Optionally, as shown in fig. 2, in order to facilitate comparison between the first track data and the second track data, the following steps may be added to the method for testing the tracking performance of a moving target of a radar provided in the embodiment of the present application:
step S105: and acquiring second track data. In a specific embodiment, as shown in fig. 3, the process of step S105 can be implemented by the following several sub-steps:
step S1051: and acquiring parameter information of the radar to be detected and motion information of the moving target. In a specific embodiment, in order to calculate the second track data, the parameter information of the detected radar 100 to be collected may include a pulse repetition period, a radar signal wavelength, a chirp rate, and the like of the detected radar 100; the motion information of the moving object to be collected may include the speed and starting distance of the moving object. The moving target recorded in step S105 and its respective sub-steps should have the same motion information as the moving target selected when the echo signal for testing the tracking performance of the radar moving target is recorded.
Step S1052: and calculating second track data according to the parameter information and the motion information. In one embodiment, the second track data may be calculated by equation (1):
q″i＝sin(2πf0t+(i-1)Δφ) (1)
wherein, q ″)iSecond track data corresponding to the ith pulse in the first radar signal sent by the radar under test 100;
Δ φ represents the phase increment between adjacent pulses in a first radar signal from the radar under test 100;
f0represents the intermediate frequency signal frequency in the first radar signal emitted by the radar under test 100; t iscRepresents the pulse repetition period of the radar under test 100; λ represents a first radar signal wavelength emitted by the radar under test 100; sτRepresents the chirp rate of a first radar signal emitted by the radar under test 100; v represents the velocity of the moving object; d represents the starting distance of the moving object; and c represents the speed of light.
In practical application, when the rising edge of the ith pulse sent by the radar under test 100 is detected, the moment is used as the starting time, and after a certain time delay, the ith second track data obtained through calculation of the formula (1) is sent to the outside through the testing device 200, so that the confusion of each second track data is avoided, the second track data corresponding to a certain first track data can be accurately screened out in the subsequent steps, and the data comparison is facilitated. For example, the local oscillator of the testing apparatus 200 may be set to a corresponding single-point frequency state according to the working frequency point of the radar 100 to be tested, and when detecting the rising edge of the ith pulse sent by the radar 100 to be tested, the testing apparatus 200 may change the initial address according to the address jump variable of the sine lookup table, and after the delay time duration is satisfied, simultaneously send the ith second flight path data calculated by the formula (1) and the ith pulse sent by the radar 100 to be tested, to the outside.
In one embodiment, the delay time of the test apparatus 200 for externally sending the second track data can be calculated by formula (2):
wherein, Δ t represents the delay time of the testing device 200 for sending the second track data to the outside; r represents a distance between the radar under test 100 and the test apparatus 200; d represents the starting distance of the moving object; and c represents the speed of light.
In another embodiment, the sine lookup table address jump variable may be calculated by equation (3):
wherein, Δ L represents the address jump variable of the sine lookup table; and delta phi denotes the phase increment between adjacent pulses in the first radar signal emitted by the radar under test 100.
Optionally, as shown in fig. 2, in order to enable the testing apparatus 200 to perform the moving target tracking performance test on the radar 100 under test by using a uniform test signal, the following steps may be added to the radar moving target tracking performance test method provided in the embodiment of the present application:
step S106: and acquiring an echo signal. The echo signal collected through step S106 may be used for a moving object tracking performance test of the radar under test 100. In a specific embodiment, as shown in fig. 3, the process of step S106 can be implemented by the following several sub-steps:
step S1061: and sending a second radar signal to the moving target moving along the preset track. In step S1061, the second radar signal is a radar detection signal sent by the testing apparatus 200, and values of parameters of the second radar signal are respectively the same as values of parameters of the first radar signal sent by the radar 100 to be tested.
In a specific embodiment, in order to offset frequency errors caused by different radar erection modes when echo signals are recorded and played back during a moving target tracking performance test of a radar device to be tested, in a second radar signal, other parameters except for a frequency modulation slope are set to be the same as parameters corresponding to a first radar signal, and the frequency modulation slope in the second radar signal is set to be half of the value of the frequency modulation slope in the first radar signal. In addition, in practical applications, in order to enable the testing apparatus 200 to smoothly acquire and record the echo signal, it is further required to set the local oscillator thereof to be in a frequency sweeping state.
Step S1062: and receiving echo signals reflected by the moving target. The moving target moving along the preset track reflects the second radar signal sent by the testing device 200, so that the testing device 200 in the frequency sweeping state receives an echo signal reflected by the moving target, and the echo signal can be used as a testing signal for testing the tracking performance of the radar moving target.
In the process of acquiring the echo signal according to the description of step S106 and its sub-steps, the test apparatus 200 may use the transmission time of each pulse in the second radar signal as a starting point, and use the starting point as the time zero point of the received corresponding echo pulse. For example, the test apparatus 200 may use the transmission time of the ith pulse in the second radar signal as a starting point, and use the starting point as the time zero point of the received ith echo pulse. When the testing device 200 executes step S101, the local oscillator of the testing device 200 may be set to a corresponding single-point frequency state according to the working frequency point of the radar 100 to be tested; when the test apparatus 200 detects a rising edge of an ith pulse in a first radar signal emitted by the radar under test 100, the ith echo pulse stored in advance may be sent out, so as to implement a test on the moving object tracking performance of the radar under test 100.
Optionally, when the test device 200 collects the echo signal for testing, the camera may also be used to collect the motion video of the moving object. The video can be assisted, so that the method for testing the tracking performance of the radar moving target provided by the embodiment of the application is further enriched and perfected.
According to the method for testing the tracking performance of the moving target of the radar, the tracking performance of the moving target of the radar is tested by using the uniform echo signal, and the problem that the existing testing method is easily influenced by environment and weather can be solved; meanwhile, the problem that in the existing testing method, the moving target for testing cannot be strictly tested according to the preset track and speed in each testing process is solved. When the moving target tracking performance of the radar is tested, fixed echo signals are used, so that the reliability and accuracy of the test are improved, and the problem that the reliability and accuracy of the test are lower when the moving target tracking performance of the radar is tested at present is solved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
An embodiment of the present application further provides a terminal device, as shown in fig. 4, where the terminal device may include: echo signal transmitting section 401, comparing section 402, and determining section 403.
The echo signal sending unit 401 is configured to send an echo signal for testing the tracking performance of a radar moving target to a radar to be tested; the specific working process can be referred to as step S101 in the above method embodiment.
The comparison unit 402 is configured to obtain first track data calculated by the detected radar according to the echo signal; the first track data and the second track data are compared; the specific working process of the method can be referred to as step S102 to step S103 in the above method embodiment.
The judging unit 403 is configured to judge whether the radar under test passes the test according to the comparison result; the specific working process can be referred to as step S104 in the above method embodiment.
Optionally, a target track unit 404 and an echo unit 405 may be added to the terminal device shown in fig. 4. Specifically, the target track unit 404 is configured to obtain the second track data, and the specific working process of the target track unit may be as described in step S105 in the foregoing method embodiment; the echo unit 405 is used to acquire callback data, and the specific working process thereof can be referred to as step S106 in the above method embodiment.
Fig. 5 is a schematic diagram of another terminal device provided in an embodiment of the present application. As shown in fig. 5, the terminal device 500 of this embodiment includes: a processor 501, a memory 502, and a computer program 503, such as a radar moving object tracking performance test program, stored in the memory 502 and executable on the processor 501. When the processor 501 executes the computer program 503, the steps in the above-mentioned embodiments of the radar moving target tracking performance test method, such as the steps S101 to S104 shown in fig. 2, are implemented. Alternatively, the processor 501 executes the computer program 503 to implement the functions of the modules/units in the device embodiments, such as the functions of the echo signal sending unit 401, the comparing unit 402, the judging unit 403, the target track unit 404 and the echo unit 405 shown in fig. 4.
The computer program 503 may be partitioned into one or more modules/units that are stored in the memory 502 and executed by the processor 501 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 503 in the terminal device 500. For example, the computer program 503 may be divided into a synchronization module, a summarization module, an acquisition module, a return module (a module in a virtual device).
The terminal device 500 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 501, a memory 502. Those skilled in the art will appreciate that fig. 5 is merely an example of a terminal device 500 and is not intended to limit the terminal device 500 and may include more or fewer components than those shown, or some components may be combined, or different components, for example, the terminal device may also include input output devices, network access devices, buses, etc.
The Processor 501 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 502 may be an internal storage unit of the terminal device 500, such as a hard disk or a memory of the terminal device 500. The memory 502 may also be an external storage device of the terminal device 500, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 500. Further, the memory 502 may also include both an internal storage unit and an external storage device of the terminal device 500. The memory 502 is used for storing the computer programs and other programs and data required by the terminal device. The memory 502 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (4)
1. A radar moving target tracking performance test method is characterized by comprising the following steps:
sending a second radar signal to a moving target moving along a preset track, and receiving an echo signal reflected by the moving target; except for the frequency modulation slope, the values of all parameters of the second radar signal are respectively the same as those of all parameters of the first radar signal sent by the radar to be detected; the value of the chirp rate in the second radar signal is half of the value of the chirp rate in the first radar signal;
sending an echo signal for testing the tracking performance of a radar moving target to a tested radar;
acquiring first track data calculated by the detected radar according to the echo signal;
comparing the first track data with pre-stored second track data;
judging whether the tested radar passes the test or not according to the comparison result;
before sending the echo signal for testing the tracking performance of the radar moving target to the radar to be tested, the method for testing the tracking performance of the radar moving target further comprises the following steps: acquiring the second track data;
the acquiring the second track data comprises:
acquiring parameter information of the radar to be detected and motion information of a moving target;
calculating the second track data according to the parameter information and the motion information;
the parameter information comprises a pulse repetition period, a radar signal wavelength and a frequency modulation slope of the radar to be detected; the motion information comprises the speed and the starting distance of the moving target;
by q ″)i＝sin(2πf0t + (i-1) Δ φ) calculating the second track data;
wherein, q ″)iSecond track data corresponding to the ith pulse in a first radar signal sent by the radar to be detected is represented;
Δ φ represents the first emitted by the radar under testPhase increment between adjacent pulses in the radar signal;
f0representing the frequency of an intermediate frequency signal in a first radar signal emitted by the radar to be detected; t iscRepresenting a pulse repetition period of the radar under test; λ represents a first radar signal wavelength emitted by the radar under test; sτThe chirp rate of a first radar signal emitted by the radar to be detected is represented; v represents the velocity of the moving object; d represents a starting distance of the moving object; and c represents the speed of light.
2. A terminal device, comprising:
the echo unit is used for sending a second radar signal to a moving target moving along a preset track and receiving an echo signal reflected by the moving target; except for the frequency modulation slope, the values of all parameters of the second radar signal are respectively the same as those of all parameters of the first radar signal sent by the radar to be detected; the value of the chirp rate in the second radar signal is half of the value of the chirp rate in the first radar signal;
the echo signal sending unit is used for sending an echo signal for testing the tracking performance of a radar moving target to the radar to be tested;
the comparison unit is used for acquiring first track data calculated by the detected radar according to the echo signal; the first track data and the second track data are compared;
the judging unit is used for judging whether the tested radar passes the test or not according to the comparison result;
the terminal device further includes: a target track unit;
the target track unit is used for acquiring parameter information of the radar to be detected and motion information of a moving target;
calculating the second track data according to the parameter information and the motion information;
the parameter information comprises a pulse repetition period, a radar signal wavelength and a frequency modulation slope of the radar to be detected; the motion information comprises the speed and the starting distance of the moving target;
by q ″)i＝sin(2πf0t + (i-1) Δ φ) calculating the second track data;
wherein, q ″)iSecond track data corresponding to the ith pulse in a first radar signal sent by the radar to be detected is represented;
delta phi represents the phase increment between adjacent pulses in a first radar signal sent by the radar to be detected;
f0representing the frequency of an intermediate frequency signal in a first radar signal emitted by the radar to be detected; t iscRepresenting a pulse repetition period of the radar under test; λ represents a first radar signal wavelength emitted by the radar under test; sτThe chirp rate of a first radar signal emitted by the radar to be detected is represented; v represents the velocity of the moving object; d represents a starting distance of the moving object; and c represents the speed of light.
3. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method as claimed in claim 1 when executing the computer program.
4. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method as set forth in claim 1.
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