CN106680789B - Angle measurement function verification method and verification system of single-pulse angle measurement equipment - Google Patents
Angle measurement function verification method and verification system of single-pulse angle measurement equipment Download PDFInfo
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- 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
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- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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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
- G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
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Abstract
The invention discloses a method and a system for verifying an angle measurement function of monopulse angle measurement equipment, which can send out an analog response signal; obtaining sum and difference weighted response signals corresponding to the analog response signals; obtaining an actual angle corresponding to the sum and difference weighted response signals; weighting a measurement angle obtained based on the sum and difference; and verifying the angle measuring function of the single-pulse angle measuring equipment in the verification system based on the actual angle and the measured angle. The method is used for solving the technical problems that the monopulse angle measurement technology in the prior art can not be realized under a laboratory environment and the test cost is high, equipment such as an antenna turntable and a transponder does not need to be erected, wireless joint test can be carried out under the laboratory environment according to the working environment of a researcher, and the angle measurement efficiency and accuracy of the monopulse angle measurement equipment are verified, so that the investment of scientific research expenses and manpower and material resources can be reduced, the test cost is reduced, and the development of the monopulse angle measurement technology is benefited.
Description
Technical Field
The invention relates to the field of navigation management, in particular to a verification method and a verification system for an angle measurement function of monopulse angle measurement equipment.
Background
The secondary radar equipment plays an important role in air traffic control, can provide data with higher precision than radar for control workers, can also provide identification information (codes of airplanes) for the control workers, and can provide danger warning information when the airplanes break down, a communication system fails or hijacking occurs. Therefore, it is important to improve the angle measurement accuracy and the distance measurement accuracy of the secondary radar.
During secondary radar angle measurement, angle measurement errors are generated due to the influence of various factors, the angle measurement errors can be divided into system errors and random errors according to the types of the errors, the system errors can be eliminated or reduced through correction, the random errors are generally difficult to eliminate, and the angle measurement errors directly influence the angle measurement accuracy. Among various angle measuring methods, the single-pulse angle measuring method which is simple to realize and good in robustness can be widely applied in practice.
The single pulse processing refers to comparing the amplitude or the phase of the same response signal received by two or more channels by using the wave beam characteristics of the antenna, and obtaining the angle difference between a response target and the central axis of the antenna after normalization processing, thereby obtaining the target direction. Theoretically, the distance and the direction of the target can be obtained through a single response signal by adopting a single-pulse technology.
Under general conditions, the requirement for realizing the single-pulse angle measurement technology is high, an antenna turntable, a transponder and the like need to be erected, and thus the research and development cost of products is greatly increased.
The key to single pulse goniometry is the following two aspects:
(1) receiving the response signal by the antenna
(2) And generating an OBA table according to the antenna test data in the actual engineering design.
After the antenna receives the response signal, the amplitude value of the sum channel and the amplitude value of the difference channel are obtained through a decoding program, and the direction of the target can be obtained by combining the OBA table.
Therefore, the technical problems existing in the prior art are as follows: the monopulse angle measurement technology cannot be realized in a laboratory environment, if an air traffic control system needs to perform joint test, equipment such as an antenna turntable and a transponder needs to be erected to verify the angle measurement efficiency and accuracy of monopulse angle measurement equipment in a secondary radar, so that the scientific research cost is greatly increased, more manpower and material resources are consumed, and the test cost is increased.
Disclosure of Invention
The embodiment of the application provides a method and a system for verifying the angle measurement function of monopulse angle measurement equipment, which are used for solving the technical problems that the monopulse angle measurement technology in the prior art cannot be realized in a laboratory environment and the test cost is high, an antenna turntable, a transponder and other equipment do not need to be erected, the wireless joint test can be carried out in the laboratory environment according to the working environment of a researcher, the angle measurement efficiency and the angle measurement accuracy of the monopulse angle measurement equipment are verified, so that the investment of scientific research expenses and manpower and material resources can be reduced, the test cost is reduced, and the development of the monopulse angle measurement technology is benefited.
A first aspect of the embodiments of the present application provides a method for verifying an angle measurement function of a monopulse angle measurement device, where the method is applied to a verification system, and the method includes:
sending out an analog response signal;
obtaining sum and difference weighted response signals corresponding to the analog response signals;
obtaining an actual angle corresponding to the sum and difference weighted response signals;
weighting a measurement angle obtained based on the sum and difference;
and verifying the angle measuring function of the single-pulse angle measuring equipment in the verification system based on the actual angle and the measured angle.
Preferably, the method further comprises:
obtaining a receiving antenna directional pattern;
and obtaining the sum and difference weighted values of the analog response signals based on the receiving antenna directional diagram.
Preferably, the obtaining a sum and a difference weighted value of the analog response signal based on the receiving antenna pattern includes:
and performing discrete sampling on the receiving antenna directional diagram to obtain discrete data of the receiving antenna directional diagram, wherein the discrete data is used as a sum and difference weighted value of the analog response signals.
Preferably, the obtaining of the sum and difference weighted response signals corresponding to the analog response signals comprises:
performing power division on the analog response signals to obtain two paths of response signals with equal amplitude and equal phase;
and weighting the two paths of response signals with equal amplitude and equal phase by using the sum and difference weighted values to obtain the sum and difference weighted response signals.
Preferably, the weighting the two equal-amplitude equal-phase response signals by using the sum and difference weighted values respectively to obtain the sum and difference weighted response signals includes:
and respectively multiplying the sum weighted value and the difference weighted value by the two paths of equiamplitude and equiphase response signals to weight the two paths of equiamplitude and equiphase response signals to obtain the sum weighted response signal and the difference weighted response signal.
Preferably, the weighting of a measurement angle obtained based on the sum and difference of the answer signals includes: and based on the sum and difference weighted response signals, performing table look-up and angle measurement by using the receiving antenna directional diagram to obtain a measurement angle.
Preferably, the verifying the angle measurement function of the single-pulse angle measurement device in the verification system based on the actual angle and the measured angle includes:
obtaining an angle error between the actual angle and the measured angle;
and verifying whether the angle measurement function of the single-pulse angle measurement equipment in the verification system is normal or not based on the angle error.
A second aspect of the embodiments of the present application provides an angle measurement function verification system for a single-pulse angle measurement device, where the system includes:
the analog transponder is used for sending an analog response signal;
the power divider is connected with the analog responder and used for outputting two paths of equal-amplitude equal-phase response signals based on the analog response signals;
the amplitude and phase control unit is connected with the power divider and used for weighting the two paths of equal-amplitude and equal-phase response signals to obtain sum and difference weighted response signals;
the single-pulse angle measuring equipment is connected with the amplitude-phase control module and used for obtaining a measuring angle based on the sum and difference weighted response signals;
the first obtaining unit is used for obtaining an actual angle corresponding to the sum and difference weighted response signals;
and the verification unit verifies the angle measurement function of the single-pulse angle measurement equipment based on the actual angle and the measured angle.
Preferably, the system further comprises:
a second obtaining unit for obtaining a receiving antenna pattern;
a weight value unit for obtaining a sum and difference weight value of the analog reply signal based on the receiving antenna directional pattern.
Preferably, the weighting value unit is specifically a discrete acquisition unit, and is configured to perform discrete sampling on the receiving antenna directional pattern to obtain discrete data of the receiving antenna directional pattern, where the discrete data is used as the sum and difference weighting values of the analog response signal.
Preferably, the phase control unit includes: the sum and difference channels are used for respectively storing the sum and difference weighted values;
and the sum channel and the difference channel are used for weighting the two paths of equal-amplitude equal-phase response signals respectively by using the sum weighted value and the difference weighted value so as to obtain the sum weighted response signal and the difference weighted response signal.
Preferably, the sum and difference channels are used for multiplying the sum and difference weighted values by the two equal-amplitude equal-phase response signals respectively to weight the two equal-amplitude equal-phase response signals to obtain the sum and difference weighted response signals.
Preferably, the monopulse angle measurement device is configured to perform table look-up angle measurement by using the receiving antenna pattern based on the sum and difference weighted response signals to obtain a measurement angle.
Preferably, the verification unit is configured to:
obtaining an angle error between the actual angle and the measured angle;
and verifying whether the angle measuring function of the single-pulse angle measuring equipment is normal or not based on the angle error.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
due to the technical scheme in the embodiment of the application, the following technical scheme is adopted: sending out an analog response signal by using a verification system; obtaining sum and difference weighted response signals corresponding to the analog response signals; obtaining an actual angle corresponding to the sum and difference weighted response signals; weighting a measurement angle obtained based on the sum and difference; and verifying the angle measuring function of the single-pulse angle measuring equipment in the verification system based on the actual angle and the measured angle.
Thus, when the angle measurement function of a monopulse angle measurement device needs to be verified, for example, the angle measurement function of an interrogator in a secondary radar is verified, a verification system can firstly send out a simulation response signal and simultaneously obtain a sum weighted response signal and a difference weighted response signal corresponding to the simulation response signal, the verification system obtains an actual angle corresponding to the sum weighted response signal and the difference weighted response signal according to the sum weighted response signal and the difference weighted response signal, the monopulse angle measurement device in the verification system, for example, the interrogator in the secondary radar, obtains a measurement angle according to the sum weighted response signal and the difference weighted response signal, and whether the angle measurement function of the interrogator in the secondary radar is normal or not can be verified according to an angle error between the actual angle and the measurement angle. Therefore, the single-pulse angle measuring technology in the application can verify the angle measuring efficiency and accuracy of the single-pulse angle measuring equipment in a laboratory environment without erecting equipment such as an antenna turntable and a transponder, so that the test cost is reduced, and the development of the single-pulse angle measuring technology is benefited.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a flowchart of an angle measurement function verification method of a single-pulse angle measurement device according to an embodiment of the present application;
FIG. 2 is a diagram of a receiving antenna pattern obtained according to an embodiment of the present application;
fig. 3 is a schematic diagram of an angle measurement function test system of a single-pulse angle measurement device according to a second embodiment of the present application;
FIG. 4 is a diagram illustrating a weight unit according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a discrete acquisition unit according to an embodiment of the present application;
fig. 6 is a schematic diagram of a magnitude-phase control unit according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of an angle measurement function test system of a single-pulse angle measurement device according to a third embodiment of the present application.
The embodiment of the application provides a method and a system for verifying the angle measurement function of monopulse angle measurement equipment, which are used for solving the technical problems that the monopulse angle measurement technology in the prior art cannot be realized in a laboratory environment and the test cost is high, an antenna turntable, a transponder and other equipment do not need to be erected, the wireless joint test can be carried out in the laboratory environment according to the working environment of a researcher, the angle measurement efficiency and the angle measurement accuracy of the monopulse angle measurement equipment are verified, so that the investment of scientific research expenses and manpower and material resources can be reduced, the test cost is reduced, and the development of the monopulse angle measurement technology is benefited.
In order to solve the technical problems, the general idea of the embodiment of the present application is as follows:
for example, when the angle measurement function of the interrogator using the monopulse angle measurement in the secondary radar needs to be verified, the verification system may first send out a simulation response signal, and simultaneously obtain sum and difference weighted response signals corresponding to the simulation response signal, because the actual angle corresponding to each set of sum and difference weighted response signals is determined, the verification system may obtain an actual angle corresponding to the sum and difference weighted response signals according to the sum and difference weighted response signals, the monopulse angle measurement device in the verification system, for example, the interrogator in the secondary radar, obtains a measurement angle based on the sum and difference weighted response signals, and according to an angle error between the actual angle and the measurement angle, it may be verified whether the angle measurement function of the interrogator in the secondary radar is normal.
In order to better understand the technical solutions, the technical solutions of the present invention are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and examples of the present invention may be combined with each other without conflict.
Example one
Referring to fig. 1, a verification method for an angle measurement function of a single-pulse angle measurement device according to an embodiment of the present application is applied to a verification system, and the method includes:
s101, sending an analog response signal;
s102, obtaining sum and difference weighted response signals corresponding to the analog response signals;
s103, obtaining an actual angle corresponding to the sum and difference weighted response signals;
s104, weighting a measurement angle obtained by the response signal based on the sum and the difference;
and S105, verifying the angle measuring function of the single-pulse angle measuring equipment in the verification system based on the actual angle and the measured angle.
Specifically, for example, the monopulse angular measurement apparatus is an interrogator using monopulse angular measurement in a secondary radar, when the angle measuring function of the interrogator adopting the monopulse angle measurement in the secondary radar needs to be verified, the verification system can firstly send out an analog response signal and simultaneously obtain a sum and difference weighted response signal corresponding to the analog response signal, since the actual angle corresponding to each set of sum and difference weighted answer signals is determined, the verification system can obtain an actual angle corresponding to the sum and difference weighted answer signals according to the sum and difference weighted answer signals, a monopulse goniometer device in the verification system such as an interrogator in a secondary radar obtains a measured angle based on the sum and difference weighted reply signals, according to the angle error between the actual angle and the measured angle, whether the angle measuring function of the interrogator in the secondary radar is normal or not can be verified.
In an embodiment of the present application, please refer to fig. 2, the method further includes:
obtaining a receiving antenna directional pattern;
and obtaining the sum and difference weighted values of the analog response signals based on the receiving antenna directional diagram.
Specifically, for example, the receiving antenna pattern is a source of data of the verification system, and may be generated by darkroom testing or manually, for example, the receiving antenna pattern already generated in fig. 2, and the verification system obtains the sum and difference weights of the analog response signals based on the receiving antenna pattern.
In an embodiment of the present application, the obtaining a sum and a difference weighted value of the analog acknowledgement signal based on the receiving antenna pattern includes:
and performing discrete sampling on the receiving antenna directional diagram to obtain discrete data of the receiving antenna directional diagram, wherein the discrete data is used as a sum and difference weighted value of the analog response signals.
Specifically, following the above example, for example, after a reception antenna pattern is obtained, the reception antenna pattern is discretized in a step of 0.4db sum-difference, thereby obtaining discrete data of the reception antenna pattern, where the discrete data is a sum and difference weighted value of the analog response signals.
In an embodiment of the present application, the obtaining a sum-difference weighted response signal corresponding to the analog response signal includes:
performing power division on the analog response signals to obtain two paths of response signals with equal amplitude and equal phase;
and weighting the two paths of response signals with equal amplitude and equal phase by using the sum and difference weighted values to obtain the sum and difference weighted response signals.
Specifically, following the above example, for example, the analog response signal is power-divided to obtain two equal-amplitude equal-phase response signals F1 and F2, and a set of sum and difference weighted values X1 and X2 are selected to weight F1 and F2 respectively, so as to obtain the sum and difference weighted response signals F11 and F12.
In this embodiment of the present application, the weighting the two equal-amplitude equal-phase response signals by using the sum and difference weighted values respectively to obtain the sum and difference weighted response signals includes:
and respectively multiplying the sum weighted value and the difference weighted value by the two paths of equiamplitude and equiphase response signals to weight the two paths of equiamplitude and equiphase response signals to obtain the sum weighted response signal and the difference weighted response signal.
Specifically, following the foregoing example, for example, the sum weight value X1 and the difference weight value X2 are multiplied by F1 and F2 respectively to obtain the sum and difference weighted response signals F11 and F12, specifically:
F11＝X1*F1；
F12＝X2*F2。
in the embodiment of the present application, the weighting a measurement angle obtained based on the sum and the difference includes: and based on the sum and difference weighted response signals, performing table look-up and angle measurement by using the receiving antenna directional diagram to obtain a measurement angle.
Specifically, in the foregoing example, for example, the interrogator for measuring the angle by the monopulse in the secondary radar performs table lookup according to the sum and difference weighted response signals F11 and F12 received, to obtain a measurement angle, which is obtained by the interrogator performing table lookup on the received F11 and F12, for example, by performing table lookup on the reception antenna pattern obtained as described above to obtain the measurement angle.
In an embodiment of the present application, the verifying an angle measurement function of a single-pulse angle measurement device in the verification system based on the actual angle and the measured angle includes:
obtaining an angle error between the actual angle and the measured angle;
and verifying whether the angle measurement function of the single-pulse angle measurement equipment in the verification system is normal or not based on the angle error.
Specifically, following the foregoing example, for example, the interrogator lookup table for single-pulse angle measurement in the secondary radar obtains a measured angle, and the sum and difference weighted response signals F11, F12 themselves correspond to an actual angle, and the angular error between the actual angle and the measured angle is obtained through processing, so as to determine whether the angle measurement function of the interrogator is normal. Further, for example, the efficiency of the interrogator angle measurement function may be determined based on the time required for the measurement angle obtained by the interrogator.
Example two
Based on the same inventive concept as the first embodiment of the present application, please refer to fig. 3, a second embodiment of the present application provides an angle measurement function verification system for a single-pulse angle measurement device, the system includes:
an analog transponder 101 for emitting an analog reply signal;
a power divider 1021, connected to the analog responder 101, and configured to output two paths of equal-amplitude and equal-phase response signals based on the analog response signals;
the amplitude-phase control unit 1022 is connected to the power divider 1021, and is configured to weight the two equal-amplitude and equal-phase response signals to obtain sum and difference weighted response signals;
the monopulse angle measurement equipment 103 is connected with the amplitude-phase control module 1022 and used for obtaining a measurement angle based on the sum and difference weighted response signals;
a first obtaining unit 104, obtaining an actual angle corresponding to the sum and difference weighted response signals;
a verification unit 105 that verifies an angle measurement function of the monopulse angle measurement device 103 based on the actual angle and the measured angle.
Specifically, for example, the analog transponder 101 sends an analog reply signal, and is divided into two equal-amplitude equal-phase reply signals F1 and F2 by the power divider 1021, and the amplitude-phase control unit 1022 weights F1 and F2 to obtain sum and difference weighted reply signals F11 and F12; and the first obtaining unit 104 can obtain an actual angle corresponding to the sum and difference weighted answer signals according to F11 and F12. For example, the single pulse angle measuring device 103 is an interrogator using single pulse angle measurement in a secondary radar, and the interrogator receives F11 and F12 and obtains a measurement angle measured by the interrogator itself from the received F11 and F12. The verification unit 105 may verify the goniometric function of the monopulse goniometric device 103 based on the actual angle and the measured angle.
In the embodiment of the present application, referring to fig. 4, the system may further include: a second obtaining unit 106 for obtaining a receiving antenna pattern 20; a weight value unit 107, configured to obtain a sum and a difference weight value of the analog acknowledgement signal based on the receiving antenna pattern.
Specifically, for example, the receiving antenna pattern 20 is a source of data for verifying the system, and may be generated by darkroom testing or manual operation, for example, the receiving antenna pattern 20 generated in fig. 2 is obtained by the second obtaining unit, and the weighting unit 107 obtains the sum and difference weights of the analog response signals based on the receiving antenna pattern.
In the embodiment of the present application, referring to fig. 5, the weighting value unit 107 is specifically a discrete acquisition unit 1071, configured to perform discrete sampling on the receiving antenna pattern 20 to obtain discrete data 1072 of the receiving antenna pattern 20, where the discrete data 1072 is the sum and difference weighting values of the analog acknowledgement signal.
Specifically, following the above example, for example, after the reception antenna pattern 20 is obtained, the reception antenna pattern 20 is discretized in a step of 0.4db sum-difference, and the discrete data 1072 of the reception antenna pattern 20 is obtained, where the discrete data is a sum-difference weighted value of the analog response signals.
In the embodiment of the present application, referring to fig. 6, the amplitude and phase control unit 1022 includes: a sum channel 1023 and a difference channel 1024, wherein the sum and difference weights are stored in the sum channel 1023 and the difference channel 1024, respectively;
the sum channel 1023 and the difference channel 1024 are used for weighting the two equal-amplitude equal-phase response signals respectively by using the sum and difference weighted values to obtain the sum and difference weighted response signals.
Specifically, following the foregoing example, for example, the analog response signal is power-divided to obtain two equal-amplitude equal-phase response signals F1 and F2, a set of sum and difference weighted values X1 and X2 are selected, X1 is stored in the sum channel, X2 is stored in the difference channel, the sum channel weights F1, and the difference channel weights F2 to obtain F11 and F12.
In this embodiment, referring to fig. 6, the sum channel 1023 and the difference channel 1024 are used for multiplying the sum and difference weighted values by the two equal-amplitude equal-phase response signals respectively, so as to weight the two equal-amplitude equal-phase response signals, and obtain the sum and difference weighted response signals.
Specifically, following the foregoing example, for example, the sum weight value X1 and the difference weight value X2 are multiplied by F1 and F2 respectively to obtain the sum and difference weighted response signals F11 and F12, specifically:
F11＝X1*F1；
F12＝X2*F2。
in the embodiment of the present application, referring to fig. 3, the single-pulse angle measuring device is configured to perform table look-up angle measurement by using the receiving antenna directional diagram to obtain a measurement angle based on the sum and difference weighted response signals.
Specifically, in the foregoing example, for example, the interrogator for measuring the angle by the monopulse in the secondary radar performs table lookup according to the sum and difference weighted response signals F11 and F12 received, to obtain a measurement angle, which is obtained by the interrogator performing table lookup on the received F11 and F12, for example, by performing table lookup on the reception antenna pattern obtained as described above to obtain the measurement angle.
In an embodiment of the present application, the verification unit is configured to:
obtaining an angle error between the actual angle and the measured angle;
and verifying whether the angle measuring function of the single-pulse angle measuring equipment is normal or not based on the angle error.
Specifically, following the foregoing example, for example, the interrogator lookup table for single-pulse angle measurement in the secondary radar obtains a measured angle, and the sum and difference weighted response signals F11, F12 themselves correspond to an actual angle, and the angular error between the actual angle and the measured angle is obtained through processing, so as to determine whether the angle measurement function of the interrogator is normal. Further, for example, the efficiency of the interrogator angle measurement function may be determined based on the time required for the measurement angle obtained by the interrogator.
EXAMPLE III
In an embodiment, see fig. 7;
an angle measurement function verification system of a monopulse angle measurement device, the system comprising:
obtaining a receiving antenna directional diagram by means of darkroom test or manual work and the like;
discretizing the receiving antenna directional pattern 20 by a discrete acquisition unit 1071 according to a certain sum-difference step path, thereby obtaining discrete data 1072 of the receiving antenna directional pattern, wherein the discrete data 1072 is used as a sum and difference weighted value of the analog response signal; selecting a group of sum and difference weight values X1, X2;
sending out an analog answering signal by the analog answering machine 101;
the power divider 1021 is connected with the analog responder 101, and divides the analog responder signal into two paths of responder signals F1 and F2 with equal amplitude and equal phase;
the sum channel 1023 weights F1 with selected X1 and the difference channel 1024 weights F2 with selected X2, resulting in a sum and difference weighted reply signal as follows:
F11＝X1*F1；
F12＝X2*F2；
the F11 and the F12 correspond to an actual angle;
after receiving F11 and F12, the monopulse angular measurement device 103, for example, the interrogator 1031 for monopulse angular measurement in the secondary radar, performs table lookup and angular measurement by using the receiving antenna pattern 20 to obtain a measurement angle;
and verifying the angle measuring function of the single-pulse angle measuring equipment such as a single-pulse angle measuring interrogator in the secondary radar according to the actual angle and the measured angle.
Through one or more technical solutions in the embodiments of the present application, one or more of the following technical effects can be achieved:
due to the technical scheme in the embodiment of the application, the following technical scheme is adopted: sending out an analog response signal by using a verification system; obtaining sum and difference weighted response signals corresponding to the analog response signals; obtaining an actual angle corresponding to the sum and difference weighted response signals; weighting a measurement angle obtained based on the sum and difference; and verifying the angle measuring function of the single-pulse angle measuring equipment in the verification system based on the actual angle and the measured angle.
Thus, when the angle measurement function of a monopulse angle measurement device needs to be verified, for example, the angle measurement function of an interrogator in a secondary radar is verified, a verification system can firstly send out a simulation response signal and simultaneously obtain a sum weighted response signal and a difference weighted response signal corresponding to the simulation response signal, the verification system obtains an actual angle corresponding to the sum weighted response signal and the difference weighted response signal according to the sum weighted response signal and the difference weighted response signal, the monopulse angle measurement device in the verification system, for example, the interrogator in the secondary radar, obtains a measurement angle according to the sum weighted response signal and the difference weighted response signal, and whether the angle measurement function of the interrogator in the secondary radar is normal or not can be verified according to an angle error between the actual angle and the measurement angle. Therefore, the single-pulse angle measuring technology in the application can achieve the efficiency and accuracy of single-pulse angle measuring equipment angle measurement verified in a laboratory environment without erecting equipment such as an antenna turntable and a transponder, so that the test cost is reduced, and the technical effect of development of the single-pulse angle measuring technology is benefited.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An angle measurement function verification method of single-pulse angle measurement equipment is applied to a verification system, and is characterized by comprising the following steps:
sending out an analog response signal;
obtaining a receiving antenna directional pattern;
performing discrete sampling on the receiving antenna directional diagram to obtain discrete data of the receiving antenna directional diagram, wherein the discrete data is used as a sum and difference weighted value of the analog response signal;
according to the sum and difference weighted values of the analog response signals, sum and difference weighted response signals corresponding to the analog response signals are obtained;
obtaining an actual angle corresponding to the sum and difference weighted response signals;
weighting a measurement angle obtained based on the sum and difference;
and verifying the angle measuring function of the single-pulse angle measuring equipment in the verification system based on the actual angle and the measured angle.
2. The method of claim 1, wherein said obtaining a sum and difference weighted reply signal corresponding to said analog reply signal comprises:
performing power division on the analog response signals to obtain two paths of response signals with equal amplitude and equal phase;
and weighting the two paths of response signals with equal amplitude and equal phase by using the sum and difference weighted values to obtain the sum and difference weighted response signals.
3. The method of claim 2, wherein said weighting said two equal amplitude equal phase response signals with said sum and difference weighting values to obtain said sum and difference weighted response signals comprises:
and respectively multiplying the sum weighted value and the difference weighted value by the two paths of equiamplitude and equiphase response signals to weight the two paths of equiamplitude and equiphase response signals to obtain the sum weighted response signal and the difference weighted response signal.
4. The method of claim 1, wherein said weighting a measured angle obtained based on said sum and difference of said reply signals comprises: and based on the sum and difference weighted response signals, performing table look-up and angle measurement by using the receiving antenna directional diagram to obtain a measurement angle.
5. The method of claim 1, wherein verifying the goniometric function of a monopulse goniometric device in the verification system based on the actual angle and the measured angle comprises:
obtaining an angle error between the actual angle and the measured angle;
and verifying whether the angle measurement function of the single-pulse angle measurement equipment in the verification system is normal or not based on the angle error.
6. An angle measurement function verification system of a monopulse angle measurement device, the system comprising:
the analog transponder is used for sending an analog response signal;
a second obtaining unit for obtaining a receiving antenna pattern;
a weighted value unit, configured to perform discrete sampling on the receiving antenna directional diagram to obtain discrete data of the receiving antenna directional diagram, where the discrete data is used as a sum and difference weighted value of the analog reply signal;
the power divider is connected with the analog responder and used for outputting two paths of equal-amplitude equal-phase response signals based on the analog response signals;
the amplitude and phase control unit is connected with the power divider and used for weighting the two paths of equal-amplitude and equal-phase response signals to obtain sum and difference weighted response signals;
the single-pulse angle measuring equipment is connected with the amplitude-phase control module and used for obtaining a measuring angle based on the sum and difference weighted response signals;
the first obtaining unit is used for obtaining an actual angle corresponding to the sum and difference weighted response signals;
and the verification unit verifies the angle measurement function of the single-pulse angle measurement equipment based on the actual angle and the measured angle.
7. The system of claim 6, wherein the phase control unit comprises: the sum and difference channels are used for respectively storing the sum and difference weighted values;
and the sum channel and the difference channel are used for weighting the two paths of equal-amplitude equal-phase response signals respectively by using the sum weighted value and the difference weighted value so as to obtain the sum weighted response signal and the difference weighted response signal.
8. The system of claim 7, wherein the sum and difference channels are configured to multiply the sum and difference weights by the two equal-amplitude equal-phase response signals, respectively, to weight the two equal-amplitude equal-phase response signals to obtain the sum and difference weighted response signals.
9. The system of claim 6 wherein said monopulse goniometry device is configured to perform a table look-up using said receive antenna pattern to obtain a measured angle based on said sum and difference weighted reply signals.
10. The system of claim 6, wherein the authentication unit is to:
obtaining an angle error between the actual angle and the measured angle;
and verifying whether the angle measuring function of the single-pulse angle measuring equipment is normal or not based on the angle error.
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