CN112068091B - Method for carrying out radar target mode by utilizing signal source - Google Patents
Method for carrying out radar target mode by utilizing signal source Download PDFInfo
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- CN112068091B CN112068091B CN202010700209.4A CN202010700209A CN112068091B CN 112068091 B CN112068091 B CN 112068091B CN 202010700209 A CN202010700209 A CN 202010700209A CN 112068091 B CN112068091 B CN 112068091B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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Abstract
The invention discloses a method for carrying out radar target mode by utilizing signal source, which comprises the following steps of step 1, setting an analog distance, wherein the analog distance is set as a theoretical distance R1, step 2, calculating t1, t1 is theoretical time of transmitting electromagnetic wave and receiving electromagnetic wave of radar, t1=2R1/c, step 3, calculating t2, t2=R2/c, R2 is actual distance between horn antenna and radar, step 4, calculating actual measurement distance R3, delta t=t1-t2=2R1/c-R2/c, namely R1= (R2+c) deltat)/2, delta t is an automatic control variable, at this moment, R1 is actually measured distance, namely actual measurement distance R3, actual measurement difference value between actual measurement distance R3 and analog distance R1 is deltaD, step 5, repeating the tests of step 1 to step 4, measuring the numerical value of a plurality of deltaD, setting the numerical value of deltaD as average value of a plurality of measured numerical values, and carrying out adjustment on the measured distance by a master control computer.
Description
Technical Field
The invention relates to the field of radar simulators, in particular to a method for performing radar target mode by using a signal source.
Background
The radar target simulator is radar test equipment, mainly utilizes a DRFM technology, and generates point target echo signals through target modulation on received radar signals in a simulation mode so as to meet the performance test requirement of the radar. The basic structure architecture of the traditional radar target simulator adopts a 19-inch overhead structure case, the inside of the structure adopts a modular structure, the space is expandable, the equipment installation interface accords with the 19-inch size series, and the equipment installation interface can be integrally assembled in a standard cabinet.
However, when the conventional radar target simulator measures the distance of the target, an inherent installation distance exists, and when the distance of the target is smaller than the installation distance, the radar target simulator cannot measure the distance of the target. In view of the above problems, a solution is proposed below.
Disclosure of Invention
The invention aims to provide a method for carrying out radar target mode by utilizing a signal source, which has the function of replacing a radar target simulator by utilizing the signal source, and realizes the advantage of distance simulation by controlling the delay and the frequency of the signal source through a main control computer.
The technical aim of the invention is realized by the following technical scheme:
a method for radar target model by signal source provides a measurement model, the measurement model comprises radar and electromagnetic wave emitter, the parameter configuration of the electromagnetic wave emitter is the same as that of the signal generator of the radar, a control system and a signal system are provided, the control system comprises a main control computer, the signal system comprises a signal source, a first trigger signal and a second trigger signal are arranged in the main control computer, the first trigger signal controls the radar to start, the second trigger signal controls the signal source to start, the signal source controls the electromagnetic wave emitter to emit signals, the measurement system comprises a measurement sub-strategy, the measurement sub-strategy comprises the following steps,
step 1, setting an analog distance;
step 2, calculating t 1 The t is 1 For the theoretical time of transmitting electromagnetic waves and receiving electromagnetic waves of the radar, t is 1 ＝2R 1 And c, wherein the c is the light speed, a first algorithm is configured, theoretical time under the simulation distance is calculated according to the first algorithm, and the first algorithm is set as follows: t is t 1 ＝2R 1 C, wherein c is the propagation speed of electromagnetic wave under vacuum state, t 1 For theoretical time, R 1 Is the simulated distance;
step 3, configuring a second algorithm, and calculating the delay time according to the second algorithm, wherein the second algorithm is set as follows: Δt=t 1 -R 2 C; the delta t is the delay time, and the R 2 Is the distance between the radar and the electromagnetic wave generator;
step 4, controlling the radar to work at a first moment, and controlling the electromagnetic wave generator to work at a second moment, wherein the difference value between the first moment and the second moment is the delay time;
step 5, when the radar receives the signal sent by the electromagnetic wave generator, obtaining the actual measurement distance R of the radar 3 。
Preferably, the measurement sub-strategy further comprises step 6, wherein the step 6 comprises calculating a measurement error value according to a third algorithm, and the third algorithm is as follows: Δd=r 1 -R 3 The ΔD is a measurement error value, and R is 3 Is the measured distance.
Preferably, the step 6 further includes repeating the steps 4 to 5 to obtain a plurality of measured distances, averaging the plurality of measured distances, and substituting the averaged value as a new measured distance into the third algorithm to obtain a measurement error value.
Preferably, a first ideal difference value is configured, when the measured error value is greater than the first ideal difference value, a first compensation command is generated according to the measured error value and sent to the radar, and when the radar receives the first compensation command, a corresponding measured error value is obtained so that the difference between the measured distance value output by the radar and the measured distance value calculated by the radar is the measured error value.
Preferably, a second ideal difference value is configured, when the measured error value is greater than the second ideal difference value, a second compensation command is generated according to the first ideal difference value and sent to the radar, and when the radar receives the second compensation command, a corresponding measured error value is acquired so that the difference between the measured distance value output by the radar and the measured distance calculated by the radar is the first ideal difference value.
Preferably, a first preset number of times is configured, and when the same measurement error value obtained by the test exceeds the first preset number of times, the compensation time is calculated according to a fourth algorithm, wherein the fourth algorithm is as follows: t is t 3 =Δd/2c, where t 3 For the compensation time, writing the compensation time into a second algorithm, so that the second algorithm is as follows: Δt=t 1 -R 2 /c-t 3 。
Preferably, the electromagnetic wave generator is configured as a horn antenna.
Preferably, the horn antenna and the radar are both positioned in the darkroom, and the inner wall of the darkroom is provided with a wave absorbing material which absorbs electromagnetic wave signals contacted with the wave absorbing material.
By adopting the technical scheme, the radar can test the simulation distance and the actual measurement distance through the first algorithm and the second algorithm, then the compensation time is calculated according to the third algorithm and the fourth algorithm, and the compensation time is not fed back into the radar system, so that the radar precision is adjusted. After the radar precision meets the requirement, the detection distance of the radar can be accurately simulated through the first algorithm and the second algorithm, so that the radar can range an object from zero distance.
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FIG. 1 is a system block diagram of an embodiment.
Detailed Description
The following description is only of the preferred embodiments of the present invention, and the scope of the present invention should not be limited to the examples, but should be construed as falling within the scope of the present invention. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
A method for radar target model by signal source provides a measurement model, which comprises radar and electromagnetic wave emitter. The electromagnetic wave generator is arranged as a horn antenna. The electromagnetic wave generator is identical to the parameter configuration of the signal generator of the radar. The horn antenna and the radar are both positioned in the darkroom, and the wave absorbing material is arranged on the inner wall of the darkroom and absorbs electromagnetic wave signals contacted with the wave absorbing material, so that the darkroom provides a non-reflection environment.
A control system and a signal system are provided, wherein the control system comprises a main control computer, and the signal system comprises a signal source. The main control computer is internally provided with a first trigger signal and a second trigger signal, the first trigger signal controls the starting of the radar, the second trigger signal controls the starting of the signal source, and the signal source controls the electromagnetic wave transmitter to transmit signals.
The main control computer can strictly control the departure time of the first trigger signal and the second trigger signal, so that the trigger delay between the two trigger signals is conveniently controlled.
The measurement scheme comprises a measurement sub-strategy, which comprises the steps of,
step 1, setting an analog distance R 1 。
Step 2, calculating t 1 Is provided with a first algorithm according to the firstThe algorithm calculates the theoretical time at the simulated distance.
The first algorithm is set to: t is t 1 ＝2R 1 And/c. Wherein c is the propagation speed of electromagnetic wave in vacuum state, t 1 For the theoretical time of transmitting electromagnetic wave and receiving electromagnetic wave of radar, R 1 Is the simulated distance.
And 3, calculating deltat, wherein deltat is the delay time, a second algorithm is configured, and the value of deltat is calculated through the second algorithm.
The second algorithm is set to: Δt=t 1 -R 2 And/c. Calculating a delay time according to a second algorithm, R 2 Is the distance between the radar and the electromagnetic wave generator.
And 4, controlling the radar to work at a first moment, and controlling the electromagnetic wave generator to work at a second moment, wherein the difference value between the first moment and the second moment is the delay time delta t. At a first moment, a first trigger signal is triggered by the main control computer, so that the radar is controlled to start. And at a second moment after the delay delta t, the main control computer triggers a second trigger signal, controls the signal source to generate a detection signal, and transmits the detection signal through the electromagnetic wave generator.
The delay delta t between the first moment and the second moment is strictly controlled by the main control computer, so that the accuracy of the measurement result is ensured.
Step 5, when the radar receives the signal sent by the electromagnetic wave generator, obtaining the actual measurement distance R of the radar 2 。
And 6, calculating the delta D, wherein the delta D is a measurement error value, a third algorithm is configured, and the value of the delta D is calculated through the third algorithm. The third algorithm is: Δd=r 1 -R 3 . Calculating a measurement error value according to a third algorithm, R 3 Is the measured distance.
Step 6 further includes repeating steps 4 to 5 to obtain a plurality of measured distances, calculating an average value of the plurality of measured distances, and substituting the average value as a new measured distance into a third algorithm to obtain a measurement error value Δd.
Is provided with a fourth algorithm for calculating the compensation time t 3 . The fourth algorithm is: t is t 3 =Δd/2c, where t 3 To compensate for time.
The first preset times are configured, and when the times of the same measurement error value delta D obtained through testing exceeds the first preset times, the compensation time is calculated according to a fourth algorithm. Writing the compensation time into the second algorithm to enable the new second algorithm to be: Δt=t 1 -R 2 /c-t 3
According to the steps 1 to 6, the measurement error value Δd is analyzed. Calculating the compensation time t according to the fourth algorithm 3 And a delay time Δt. Is configured with a first ideal difference delta d 1 And a second ideal difference Deltad 2 。
When the measured error value Δd is greater than the first ideal error value Δd 1 And is smaller than the second ideal difference delta d 2 And generating a first compensation command according to the measurement error value and sending the first compensation command to the radar. When the radar receives the first compensation command, a corresponding measurement error value delta D is acquired. Analog range value R of radar output 1 Measured distance value R calculated by radar 3 The difference value of (2) is the measurement error value.
And when the measured error value delta D is larger than the second ideal difference value, generating a second compensation command according to the first ideal difference value and sending the second compensation command to the radar. When the radar receives the second compensation command, obtaining a corresponding measurement error value delta D and an analog distance value R output by the radar 1 Measured distance value R calculated by radar 3 Is the first ideal difference.
Working principle: after finishing the precision adjustment of the radar system, determining the compensation time t of the radar 3 The main control computer obtains delay time delta t according to calculation, and at the first moment, the main control computer triggers the first trigger signal so as to control the radar to generate a local oscillation signal, and after the delay time delta t, the main control computer triggers the second trigger signal so as to control the signal source to generate a detection signal, the detection signal generated by the signal source can trigger the horn antenna to start, and the horn antenna transmits the detection signal to the radar in an electromagnetic wave mode. According to a new second algorithm Δt=t 1 -R 2 /c-t 3 And a first algorithm t 1 ＝2R 1 And/c, obtaining the measured distance R of the radar 3 Is a numerical value of (2).
The measured distance R can be realized by controlling delta t 3 When the master control computer triggers the second trigger signal preferentially, the measured distance R can be made 3 Less than the inherent mounting distance of the radar. When Δt= -R 2 /c-t 3 In this case, the measured distance R 3 Is 0. Thus, starting from a distance of 0, the detection of the object position is realized.
The technical problems, technical solutions and beneficial effects that the present invention solves are further described in detail in the above specific embodiments, it should be understood that the above is only specific embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for radar target modeling by using a signal source, providing a measurement model, wherein the measurement model comprises a radar and an electromagnetic wave transmitter, the electromagnetic wave generator has the same parameter configuration as the signal generator of the radar, providing a control system and a signal system, wherein the control system comprises a main control computer, the signal system comprises a signal source, a first trigger signal and a second trigger signal are arranged in the main control computer, the first trigger signal controls the radar to start, the second trigger signal controls the signal source to start, and the signal source controls the electromagnetic wave transmitter to transmit signals, and the method is characterized by comprising a measurement sub-strategy, wherein the measurement sub-strategy comprises the following steps,
step 1, setting the simulation distance,
step 2, calculating t 1 The t is 1 For the theoretical time of transmitting electromagnetic waves and receiving electromagnetic waves of the radar, t is 1 ＝2R 1 And c, wherein the c is the light speed, a first algorithm is configured, theoretical time under the simulation distance is calculated according to the first algorithm, and the first algorithm is set as follows: t is t 1 ＝2R 1 C, wherein c is the propagation speed of electromagnetic wave under vacuum state, t 1 For theoretical time, R 1 Is the simulated distance;
step (a)3, configuring a second algorithm, and calculating the delay time according to the second algorithm, wherein the second algorithm is set as follows: Δt=t 1 -R 2 C; the delta t is the delay time, and the R 2 Is the distance between the radar and the electromagnetic wave generator;
step 4, controlling the radar to work at a first moment, and controlling the electromagnetic wave generator to work at a second moment, wherein the difference value between the first moment and the second moment is the delay time;
step 5, when the radar receives the signal sent by the electromagnetic wave generator, obtaining the actual measurement distance R of the radar 3 。
2. The method of claim 1, wherein the measurement sub-strategy further comprises step 6, wherein the step 6 comprises calculating a measurement error value according to a third algorithm, wherein the third algorithm is: Δd=r 1 -R 3 The ΔD is a measurement error value, and R is 3 Is the measured distance.
3. The method of claim 2, wherein the step 6 further comprises repeating the steps 4 to 5 to obtain a plurality of measured distances, averaging the plurality of measured distances and substituting the averaged value as a new measured distance into the third algorithm to obtain the measurement error value.
4. The method according to claim 1, wherein a first ideal difference is configured, when the measured error value is greater than the first ideal difference, a first compensation command is generated according to the measured error value and sent to the radar, and when the radar receives the first compensation command, a corresponding measured error value is obtained so that a difference between the measured distance value output by the radar and the measured distance value calculated by the radar is the measured error value.
5. The method according to claim 4, wherein a second ideal difference is configured, and when the measured error value is greater than the second ideal difference, a second compensation command is generated according to the first ideal difference, and the second compensation command is sent to the radar, and when the radar receives the second compensation command, the corresponding measured error value is obtained so that the difference between the measured distance value output by the radar and the measured distance calculated by the radar is the first ideal difference.
6. The method for radar target modeling using a signal source according to claim 2, wherein a first predetermined number of times is configured, and when the same measured error value obtained by the test exceeds the first predetermined number of times, the compensation time is calculated according to a fourth algorithm, wherein the fourth algorithm is: t is t 3 =Δd/2c, where t 3 For the compensation time, writing the compensation time into a second algorithm, so that the second algorithm is as follows: Δt=t 1 -R 2 /c-t 3 。
7. A method for radar target modeling with a signal source as defined in claim 6, wherein the electromagnetic wave generator is configured as a horn antenna.
8. The method of claim 7, wherein the horn antenna and the radar are both located in a darkroom, and a wave absorbing material is disposed on an inner wall of the darkroom, and the wave absorbing material absorbs electromagnetic wave signals contacting the wave absorbing material.
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