Pointing calibration method, device and equipment of radar antenna and storage medium

Abstract

The invention discloses a pointing calibration method and device of a radar antenna, equipment and a storage medium. The method comprises the following steps: mechanically scanning the sun in a preset azimuth angle and electronically scanning the sun in a preset pitch angle by using a phased array radar, and determining a signal-to-noise ratio of a sun noise signal received by each scanning point in a preset range; the preset range comprises a preset azimuth angle and a preset pitch angle, and takes a theoretical sun position as a center; determining the actual sun position based on the signal-to-noise ratio of the sun noise signal received by each scanning point in the preset range; calculating a target correction value of the radar antenna according to the theoretical sun position and the actual sun position; and performing pointing calibration processing on the radar antenna based on the target correction value. According to the method, through mechanical scanning of the phased array radar in the azimuth dimension and electronic scanning of the phased array radar in the pitching dimension, the efficiency of pointing calibration of the radar antenna is improved.

Description

Technical Field

[0001] The present application relates to the technical field of antenna calibration, and particularly to a method, device, equipment and storage medium for pointing calibration of a radar antenna. Background Art

[0002] With the continuous development of radar technology, higher requirements are put forward for performance indicators such as the detection accuracy and resolution of the radar. As a key component of the radar, the pointing accuracy of the azimuth angle and elevation angle of the antenna is easily affected by factors such as mechanical installation errors, array surface deformation, temperature and humidity changes, etc. And the pointing accuracy directly affects the overall performance of the radar. Therefore, it is necessary to regularly calibrate the pointing of the radar antenna.

[0003] In the prior art, usually, calibration personnel continuously make manual adjustments using calibration tools until the pointing of the radar antenna meets the calibration requirements. This process takes a long time and depends on the experience of the calibration personnel, thus resulting in low calibration efficiency and poor calibration accuracy for the pointing of the radar antenna. Summary of the Invention

[0004] Based on the above problems, the present application provides a method, device, equipment and storage medium for pointing calibration of a radar antenna, aiming to improve the efficiency and calibration accuracy of pointing calibration of the radar antenna.

[0005] The embodiments of the present application disclose the following technical solutions:

[0006] In a first aspect, the present application provides a method for pointing calibration of a radar antenna, the method comprising:

[0007] Mechanically scanning the sun within a preset azimuth angle and electronically scanning the sun within a preset elevation angle by using a phased array radar to determine the signal-to-noise ratio of the solar noise signal received at each scanning point within a preset range; the preset range includes the preset azimuth angle and the preset elevation angle and is centered on the theoretical solar position;

[0008] Based on the signal-to-noise ratio of the solar noise signal received at each scanning point within the preset range, determining the actual solar position;

[0009] Calculating a target correction value of the radar antenna according to the theoretical solar position and the actual solar position;

[0010] Based on the target correction value, performing a pointing calibration process on the radar antenna.

[0011] Optionally, for each scanning point within the preset range, the mechanically scanning the sun within a preset azimuth angle and electronically scanning the sun within a preset elevation angle by using a phased array radar to determine the signal-to-noise ratio of the solar noise signal received at each scanning point within a preset range, as described above, includes:

[0012] Adjust the beam elevation angle through the phased array phase shifter in the phased array radar for electronic scanning, and control the phased array radar to adjust the beam azimuth angle through the servo motor for mechanical scanning, and direct the beam of the phased array radar to the scanning point;

[0013] Collect the noise power and echo signal power corresponding to the solar noise signal received by each scanning distance library in the preset scanning distance library at the scanning point, and calculate the corresponding average noise power and average echo signal power; the echo signal power is the signal power received after the electromagnetic wave emitted by the phased array radar is reflected by the sun;

[0014] Calculate the signal-to-noise ratio of the solar noise signal received at the scanning point according to the average noise power and average echo signal power.

[0015] Optionally, in the method as described above, determining the actual solar position based on the signal-to-noise ratio of the solar noise signal received at each scanning point within the preset range includes:

[0016] Generate a signal-to-noise ratio matrix diagram based on the signal-to-noise ratio of the solar noise signal received at each scanning point; the signal-to-noise ratio matrix diagram is used to describe the signal-to-noise ratio values of all scanning points within the preset range;

[0017] Determine the signal-to-noise ratio peak and the actual elevation angle and actual azimuth angle of the signal point corresponding to the signal-to-noise ratio peak from the signal-to-noise ratio matrix diagram; the actual elevation angle and the actual azimuth angle are used to characterize the actual solar position.

[0018] Optionally, in the method as described above, the method for determining the theoretical solar position includes:

[0019] Perform time conversion based on the obtained time data and calculate the Julian century number;

[0020] Calculate the theoretical solar position based on the Julian century number, the longitude and latitude of the radar antenna; the theoretical solar position includes a theoretical elevation angle and a theoretical azimuth angle.

[0021] Optionally, in the method as described above, calculating the target correction value of the radar antenna according to the theoretical solar position and the actual solar position includes:

[0022] Calculate the elevation angle correction value of the radar antenna according to the actual elevation angle and the theoretical elevation angle;

[0023] Calculate the azimuth angle correction value of the radar antenna according to the actual azimuth angle and the theoretical azimuth angle.

[0024] Optionally, for the method described above, the process of performing pointing calibration on the radar antenna based on the target correction value includes:

[0025] Obtain the initial elevation angle and initial azimuth angle of the radar antenna;

[0026] Compensate the elevation angle correction value to the initial elevation angle to obtain the target elevation angle;

[0027] Compensate the azimuth angle correction value to the initial azimuth angle to obtain the target azimuth angle;

[0028] Perform pointing calibration on the radar antenna through a control command generated based on the target elevation angle and the target azimuth angle.

[0029] Optionally, for the method described above, the method further includes:

[0030] Use the phased array radar to mechanically scan the sun within a first preset azimuth angle and electronically scan the sun within a first preset elevation angle, and determine the signal-to-noise ratio of the sun noise signal received at each scan point within a first preset range; the first preset azimuth angle is less than the preset azimuth angle; the first preset elevation angle is less than the preset elevation angle;

[0031] Based on the signal-to-noise ratio of the sun noise signal received at each scan point within the first preset range, determine the first actual sun position;

[0032] Calculate the first pointing correction value of the radar antenna according to the theoretical sun position and the first actual sun position;

[0033] Perform pointing calibration on the radar antenna based on the first pointing correction value.

[0034] In a second aspect, the present application provides a pointing calibration device for a radar antenna, including:

[0035] A radar scanning module, configured to use the phased array radar to mechanically scan the sun within a preset azimuth angle and electronically scan the sun within a preset elevation angle, and determine the signal-to-noise ratio of the sun noise signal received at each scan point within a preset range; the preset range includes the preset azimuth angle and the preset elevation angle and is centered on the theoretical sun position;

[0036] A sun position determination module, configured to determine the actual sun position based on the signal-to-noise ratio of the sun noise signal received at each scan point within the preset range;

[0037] A correction value determination module, configured to calculate the pointing correction value of the radar antenna according to the theoretical sun position and the actual sun position;

[0038] A pointing calibration module, configured to perform pointing calibration processing on the radar antenna based on the pointing correction value.

[0039] In a third aspect, the present application provides an electronic device, which includes: a processor, and a memory communicatively connected to the processor;

[0040] The memory stores computer-executable instructions;

[0041] The processor executes the computer-executable instructions stored in the memory to implement the pointing calibration method of the radar antenna described in any one of the above embodiments.

[0042] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the pointing calibration method of the radar antenna described in any one of the above embodiments.

[0043] Compared with the prior art, the present application has the following beneficial effects:

[0044] The method of the present application uses a phased array radar to perform a more refined mechanical scan of the sun within a preset azimuth angle in a preset range and an electronic scan of the sun within a preset elevation angle in the preset range, and determines the signal-to-noise ratio of the sun noise signal received at each scan point within the preset range; the preset range is centered on the theoretical sun position; furthermore, based on the signal-to-noise ratio of the sun noise signal received at each scan point within the preset range, the actual sun position can be accurately obtained. Then, using the target correction value of the radar antenna calculated according to the theoretical sun position and the actual sun position, pointing calibration processing is performed on the radar antenna, thereby realizing fast pointing calibration of the radar antenna, and improving the calibration accuracy and calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 It is a schematic flowchart of an embodiment of a pointing calibration method for a radar antenna provided by the present application;

[0047] Figure 2 It is a schematic flowchart of another embodiment of a pointing calibration method for a radar antenna provided by the present application;

[0048] Figure 3Schematic flow diagram of still another embodiment of a method for pointing calibration of a radar antenna provided by this application;

[0049] Figure 4 A signal-to-noise ratio matrix diagram in this embodiment;

[0050] Figure 5 Another signal-to-noise ratio matrix diagram in this embodiment;

[0051] Figure 6 Schematic structural diagram of an embodiment of a device for pointing calibration of a radar antenna provided by this application;

[0052] Figure 7 Schematic structural diagram of another embodiment of a device for pointing calibration of a radar antenna provided by this application;

[0053] Figure 8 Schematic structural diagram of an embodiment of an electronic device provided by this application. Detailed implementation manners

[0054] As described above, currently, the adjustment of the radar antenna pointing mostly relies on manual operation. The operator needs to manually adjust parameters such as the antenna angle on site based on experience and relevant tools. This method often requires a large amount of on-site operation by staff under different environmental conditions, consuming a lot of time and energy, resulting in low efficiency, and the accuracy of manual calibration is relatively poor.

[0055] The inventor has proposed a method, device, equipment and storage medium for pointing calibration of a radar antenna through research to solve the technical problems of low calibration efficiency and low calibration accuracy in the prior art for the pointing of radar antennas.

[0056] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0057] See Figure 1 , this figure is a schematic flow diagram of an embodiment of a method for pointing calibration of a radar antenna provided by this application. As Figure 1 shown, the method includes:

[0058] S101: Use a phased array radar to mechanically scan the sun within a preset azimuth angle and electronically scan the sun within a preset elevation angle, and determine the signal-to-noise ratio of the sun noise signal received at each scan point within the preset range.

[0059] Among them, the preset range includes a preset azimuth angle and a preset elevation angle, and is centered on the theoretical solar position.

[0060] In this embodiment, using a phased array radar to scan the sun includes an azimuth dimension and an elevation dimension. Among them, in the azimuth dimension, the phased array radar is controlled by a servo motor to adjust the beam azimuth angle for mechanical scanning; in the elevation dimension, the beam elevation angle is adjusted by a phased array phase shifter in the phased array radar for electronic scanning. For example, the preset range is centered on the theoretical solar position, the preset azimuth angle is ±40°, and the preset elevation angle is ±10°. And mechanical scanning is performed at a step of 0.5° in the azimuth dimension, and electronic scanning is performed at a step of 0.5° in the elevation dimension. The noise power and echo signal power corresponding to the solar noise signal received by each scan distance library in the preset scan distance library are collected for each scan point, and the average noise power and average echo signal power corresponding to each scan point are calculated. Among them, the echo signal power is the signal power received after the electromagnetic wave emitted by the phased array radar is reflected by the sun; finally, according to the average noise power and average echo signal power, the signal-to-noise ratio of the solar noise signal received by the scan point is calculated.

[0061] Among them, the method for determining the theoretical solar position may include:

[0062] Based on the obtained time data, time conversion is performed to calculate the Julian century number.

[0063] In this embodiment, if the obtained time data is Coordinated Universal Time (UTC), the Julian day and the Julian century number can be directly calculated. If the obtained time is local time, the local time needs to be converted to UTC time before calculating the Julian century number.

[0064] Based on the Julian century number, the longitude and latitude of the radar antenna, the theoretical solar position is calculated; the theoretical solar position includes a theoretical elevation angle and a theoretical azimuth angle.

[0065] In this embodiment, based on the calculated Julian century number and the obtained longitude and latitude of the radar antenna, astronomical data such as the geometric mean ecliptic longitude, geometric mean anomaly, right ascension and declination, and hour angle of the sun are calculated respectively, so as to calculate the theoretical solar position.

[0066] In this embodiment, based on the obtained time data, time conversion is performed to calculate the Julian century number, and then based on the Julian century number, the longitude and latitude of the radar antenna, the theoretical solar position is calculated; the theoretical solar position includes a theoretical elevation angle and a theoretical azimuth angle, realizing accurate positioning of the theoretical solar position and reducing the calculation deviation of the solar position caused by time error.

[0067] S102: Determine the actual solar position based on the signal-to-noise ratio of the solar noise signal received at each scan point within a preset range.

[0068] In this embodiment, based on the signal-to-noise ratio of the solar noise signal received at each scan point, determine the scan point with the maximum signal-to-noise ratio. The elevation angle and azimuth angle corresponding to this scan point are the actual elevation angle and actual azimuth angle corresponding to the actual solar position.

[0069] S103: Calculate the target correction value of the radar antenna according to the theoretical solar position and the actual solar position.

[0070] In this embodiment, the theoretical solar position includes a theoretical elevation angle and a theoretical azimuth angle; the actual solar position includes an actual elevation angle and an actual azimuth angle. By comparing the deviation between the actual elevation angle and the theoretical elevation angle, calculate the elevation angle correction value of the radar antenna, and calculate the azimuth angle correction value of the radar antenna according to the deviation between the actual azimuth angle and the theoretical azimuth angle.

[0071] S104: Perform pointing calibration processing on the radar antenna based on the target correction value.

[0072] In this embodiment, when performing pointing calibration processing on the radar antenna, compensate the azimuth angle correction value in the obtained target correction value into the azimuth angle of the radar antenna, and compensate the elevation angle correction value in the obtained target correction value into the elevation angle of the radar antenna.

[0073] In this embodiment, use a phased array radar to perform a more refined mechanical scan of the sun within a preset azimuth angle in a preset range and an electronic scan of the sun within a preset elevation angle in the preset range, and determine the signal-to-noise ratio of the solar noise signal received at each scan point within the preset range; the preset range is centered on the theoretical solar position; furthermore, based on the signal-to-noise ratio of the solar noise signal received at each scan point within the preset range, the actual solar position can be accurately obtained. Then, use the target correction value of the radar antenna calculated according to the theoretical solar position and the actual solar position to perform pointing calibration processing on the radar antenna, thereby realizing fast pointing calibration of the radar antenna and improving the calibration accuracy and calibration efficiency.

[0074] See Figure 2 , which is a schematic flowchart of another embodiment of a method for pointing calibration of a radar antenna provided by this application. As Figure 2 shown, on the basis of the above embodiment, for each scan point within the preset range, a specific implementation manner of "using a phased array radar to perform a mechanical scan of the sun within a preset azimuth angle and an electronic scan of the sun within a preset elevation angle, and determining the signal-to-noise ratio of the solar noise signal received at each scan point within the preset range" in S101 includes:

[0075] S1011: Adjust the beam elevation angle through the phased array phase shifter in the phased array radar for electronic scanning, and control the phased array radar through the servo motor to adjust the beam azimuth angle for mechanical scanning, so that the beam of the phased array radar points to the scanning point.

[0076] In this embodiment, for each scanning point, use the phased array phase shifter in the phased array radar to perform electronic scanning to adjust the beam elevation angle, and control the phased array radar through the servo motor to perform mechanical scanning to adjust the beam azimuth angle, so that the beam of the phased array radar points to the current scanning point.

[0077] S1012: Collect the noise power and echo signal power corresponding to the solar noise signal received by each scanning distance bin in the preset scanning distance bin at the scanning point, and calculate the corresponding average noise power and average echo signal power.

[0078] Among them, the echo signal power is the signal power received after the electromagnetic wave emitted by the phased array radar is reflected by the sun.

[0079] In this embodiment, the distance bin is a small distance unit divided by the radar along the radial direction during the processing of the echo signal. For example, if the range resolution is 300 meters and the radar has collected the echo signal power of the 1st - 1000th range bins in total, then since the data of the previous range bins may be interfered, the preset scanning distance bin can skip the previously collected range bins and select the data of the subsequent 100 range bins, that is, the 100 range bins from the 901st to the 1000th as the preset range bins, and collect the noise power and echo signal power corresponding to the solar noise signal received by each scanning distance bin in these 100 scanning databases. Therefore, the average noise power corresponding to this scanning point can be obtained by taking the mean of the noise power; similarly, the average echo signal power corresponding to this scanning point can be obtained by taking the mean of the echo signal power.

[0080] It can be understood that the sun itself is a natural signal source and will emit noise signals. The radar will receive the solar noise signals during the scanning process. When the radar receiving beam is far from the sun, the collected solar noise power is small, and when it is close to the sun, the collected noise power is large.

[0081] S1013: Calculate the signal-to-noise ratio of the solar noise signal received at the scanning point according to the average noise power and the average echo signal power.

[0082] In this embodiment, according to the calculated average noise power and average echo signal power corresponding to this scanning point, the signal-to-noise ratio of the solar noise signal received at this scanning point can be calculated.

[0083] In this embodiment, the phased array phase shifter in the phased array radar is used to adjust the beam elevation angle for electronic scanning, and the servo motor is used to control the phased array radar to adjust the beam azimuth angle for mechanical scanning, which can more accurately control the beam direction and ensure that the beam accurately points to the scanning point. Then, the noise power and echo signal power corresponding to the solar noise signal received by each scanning distance library in the preset scanning distance library at the scanning point are collected, and the corresponding average noise power and average echo signal power are calculated. According to the average noise power and average echo signal power, the signal-to-noise ratio of the solar noise signal received by the scanning point is calculated, improving the accuracy of signal-to-noise ratio measurement.

[0084] See Figure 3 , which is a schematic flowchart of still another embodiment of a method for calibrating the pointing of a radar antenna provided by this application. As Figure 3 shown, based on the above embodiment, a specific implementation manner of "determining the actual solar position based on the signal-to-noise ratio of the solar noise signal received by each scanning point within a preset range" in S102 includes:

[0085] S1021: Generate a signal-to-noise ratio matrix diagram based on the signal-to-noise ratio of the solar noise signal received by each scanning point.

[0086] Among them, the signal-to-noise ratio matrix diagram is used to describe the signal-to-noise ratio values of all scanning points within a preset range.

[0087] S1022: Determine the signal-to-noise ratio peak value and the actual elevation angle and actual azimuth angle of the signal point corresponding to the signal-to-noise ratio peak value from the signal-to-noise ratio matrix diagram.

[0088] Among them, the actual elevation angle and actual azimuth angle are used to characterize the actual solar position.

[0089] In this embodiment, based on the signal-to-noise ratio of the solar noise signal received by each scanning point within the first preset range, a corresponding signal-to-noise ratio matrix diagram is generated, as Figure 4 shown. Among them, the x-axis of the signal-to-noise ratio matrix diagram is the azimuth angle, and the y-axis is the elevation angle; the lighter the color area in the signal-to-noise ratio matrix diagram, the lower the signal-to-noise ratio value of the signal point. Correspondingly, the darker the color area, the higher the signal-to-noise ratio value of the signal point. Therefore, the signal point with the darkest color, that is, the maximum signal-to-noise ratio, is determined from it, and the elevation angle and azimuth angle corresponding to this scanning point are obtained, which are the actual elevation angle and actual azimuth angle corresponding to the actual solar position.

[0090] In this embodiment, based on the signal-to-noise ratio of the solar noise signals received at each scanning point, a signal-to-noise ratio matrix diagram is generated to visually display the signal-to-noise ratio values of all scanning points within a preset range in a graphical manner, which helps to quickly identify the peak of the signal-to-noise ratio. Then, the signal-to-noise ratio peak, as well as the actual elevation angle and actual azimuth angle of the signal point corresponding to the signal-to-noise ratio peak, are determined from the signal-to-noise ratio matrix diagram, thereby accurately obtaining the actual solar position and improving the accuracy and efficiency of positioning the actual solar position.

[0091] Further, based on the above embodiment, a specific implementation manner of "calculating the target correction value of the radar antenna according to the theoretical solar position and the actual solar position" in S103 includes:

[0092] S1031: Calculate the elevation angle correction value of the radar antenna according to the actual elevation angle and the theoretical elevation angle.

[0093] In this embodiment, the elevation angle correction value of the radar antenna can be obtained by subtracting the actual elevation angle from the theoretical elevation angle. If the actual elevation angle is less than the theoretical elevation angle, the correction value is positive, indicating that the antenna needs to be adjusted upward; conversely, if the actual elevation angle is greater than the theoretical elevation angle, the correction value is negative, indicating that the antenna needs to be adjusted downward.

[0094] S1032: Calculate the azimuth angle correction value of the radar antenna according to the actual azimuth angle and the theoretical azimuth angle.

[0095] In this embodiment, the azimuth angle correction value of the radar antenna can be obtained by subtracting the actual azimuth angle from the theoretical azimuth angle. If the actual azimuth angle is less than the theoretical azimuth angle, but the difference exceeds 180°, the correction value should be the theoretical azimuth angle minus (the actual azimuth angle + 360°); conversely, if the actual azimuth angle is greater than the theoretical azimuth angle, but the difference exceeds 180°, the correction value should be (the theoretical azimuth angle + 360°) minus the actual azimuth angle.

[0096] In this embodiment, the elevation angle correction value of the radar antenna is calculated according to the actual elevation angle and the theoretical elevation angle; the azimuth angle correction value of the radar antenna is calculated according to the actual azimuth angle and the theoretical azimuth angle, which can accurately determine the deviation of the azimuth angle and elevation angle of the radar antenna. By calculating the correction values of the elevation angle and azimuth angle, the actual pointing of the radar antenna can be adjusted.

[0097] Further, based on the above embodiment, a specific implementation manner of "performing pointing calibration on the radar antenna based on the target correction value" in S104 includes:

[0098] S1041: Obtain the initial elevation angle and initial azimuth angle of the radar antenna.

[0099] In this embodiment, the built-in sensors or measuring devices of the radar are used to obtain the initial pitch angle and the initial azimuth angle of the radar antenna in real time, and these angle values reflect the current actual pointing state of the radar antenna.

[0100] S1042: Compensate the pitch angle correction value to the initial pitch angle to obtain the target pitch angle.

[0101] In this embodiment, the pitch angle correction value is compensated to the initial pitch angle to obtain the target pitch angle. The calculation method of the target pitch angle can be to sum the initial pitch angle and the pitch angle correction value.

[0102] S1043: Compensate the azimuth angle correction value to the initial azimuth angle to obtain the target azimuth angle.

[0103] In this embodiment, the azimuth angle correction value is compensated to the initial azimuth angle to obtain the target azimuth angle. The calculation method of the target azimuth angle can be to sum the initial azimuth angle and the azimuth angle correction value.

[0104] S1044: Perform pointing calibration processing on the radar antenna through the control instruction generated based on the target pitch angle and the target azimuth angle.

[0105] In this embodiment, the radar control software or programming interface is used to generate corresponding control instructions according to the target pitch angle and the target azimuth angle. These instructions will be used as the basis for adjusting the radar antenna and guide the radar antenna to perform pointing calibration towards the target position. After receiving the control instructions, the radar antenna servo controls the rotation of the radar antenna for pointing adjustment according to the target pitch angle and target azimuth angle information in the instructions.

[0106] In this embodiment, obtaining the initial pitch angle and the initial azimuth angle of the radar antenna; compensating the pitch angle correction value to the initial pitch angle to obtain the target pitch angle; compensating the azimuth angle correction value to the initial azimuth angle to obtain the target azimuth angle; performing pointing calibration processing on the radar antenna through the control instruction generated based on the target pitch angle and the target azimuth angle can guide the radar antenna to point more accurately to the target position, thereby improving the pointing accuracy of the radar antenna.

[0107] Further, on the basis of the above embodiment, in order to perform more accurate pointing calibration on the radar antenna, after S104 "Perform pointing calibration processing on the radar antenna based on the target correction value", the method may further include:

[0108] Use the phased array radar to perform mechanical scanning on the sun within the first preset azimuth angle and perform electronic scanning on the sun within the first preset pitch angle to determine the signal-to-noise ratio of the solar noise signal received at each scanning point within the first preset range.

[0109] Among them, the first preset azimuth angle is less than the preset azimuth angle; the first preset elevation angle is less than the preset elevation angle.

[0110] In this embodiment, for example, the first preset range is centered on the theoretical solar position, the first preset azimuth angle is ±5°, and the first preset elevation angle is ±1.5°. Mechanical scanning is performed in the azimuth dimension with a step of 0.1°, and electronic scanning is performed in the elevation dimension with a step of 0.5°. The noise power and echo signal power corresponding to the solar noise signal received by each scan point in each scan distance library in the preset scan distance library are collected, and the average noise power and average echo signal power corresponding to each scan point are calculated; finally, according to the average noise power and average echo signal power, the signal-to-noise ratio of the solar noise signal received by the scan point is calculated.

[0111] Based on the signal-to-noise ratio of the solar noise signal received by each scan point within the first preset range, the first actual solar position is determined.

[0112] In this embodiment, based on the signal-to-noise ratio of the solar noise signal received by each scan point within the first preset range, a corresponding signal-to-noise ratio matrix diagram is generated, as Figure 5 shown. Among them, the lighter the color, the lower the signal-to-noise ratio value of the signal point. Correspondingly, the darker the color, the higher the signal-to-noise ratio value of the signal point. Therefore, the signal point with the darkest color, that is, the maximum signal-to-noise ratio, is determined, and the elevation angle and azimuth angle corresponding to this scan point are obtained, which are the first actual elevation angle and the first actual azimuth angle corresponding to the first actual solar position.

[0113] According to the theoretical solar position and the first actual solar position, the first pointing correction value of the radar antenna is calculated.

[0114] Based on the first pointing correction value, pointing calibration processing is performed on the radar antenna.

[0115] In this embodiment, by comparing the deviation between the first actual solar position and the theoretical solar position, the first pointing correction value of the radar antenna is calculated. Furthermore, when performing pointing calibration processing on the radar antenna, the first pointing correction value is compensated into the current radar antenna pointing.

[0116] In this embodiment, a phased array radar is used to mechanically scan the sun within a first preset azimuth angle and electronically scan the sun within a first preset elevation angle to determine the signal-to-noise ratio of the solar noise signal received at each scan point within a first preset range; wherein, the first preset azimuth angle is less than the preset azimuth angle; the first preset elevation angle is less than the preset elevation angle; then, based on the signal-to-noise ratio of the solar noise signal received at each scan point within the first preset range, a first actual solar position is determined, and according to the theoretical solar position and the first actual solar position, a first pointing correction value of the radar antenna is calculated, and further, a more refined pointing calibration process is performed on the radar antenna to improve the accuracy of the radar antenna pointing calibration.

[0117] See Figure 6 , which is a schematic structural diagram of an embodiment of a pointing calibration device for a radar antenna provided by the present application. As Figure 6 shown, the device 60 includes a radar scanning module 61, a solar position determination module 62, a correction value determination module 63, and a pointing calibration module 64.

[0118] Among them, the radar scanning module 61 is used to mechanically scan the sun within a preset azimuth angle and electronically scan the sun within a preset elevation angle by using a phased array radar to determine the signal-to-noise ratio of the solar noise signal received at each scan point within a preset range; the preset range includes the preset azimuth angle and the preset elevation angle and is centered on the theoretical solar position.

[0119] The solar position determination module 62 is used to determine the actual solar position based on the signal-to-noise ratio of the solar noise signal received at each scan point within the preset range.

[0120] The correction value determination module 63 is used to calculate the pointing correction value of the radar antenna according to the theoretical solar position and the actual solar position.

[0121] The pointing calibration module 64 is used to perform a pointing calibration process on the radar antenna based on the pointing correction value.

[0122] The pointing calibration device for a radar antenna provided by the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, and will not be elaborated here.

[0123] Further, based on the above embodiments, for each scanning point within a preset range, the radar scanning module 61 is specifically configured to adjust the beam elevation angle through the phased array phase shifter in the phased array radar for electronic scanning, and control the phased array radar through a servo motor to adjust the beam azimuth angle for mechanical scanning, and direct the beam of the phased array radar to the scanning point; collect the noise power and echo signal power corresponding to the solar noise signal received by each scanning distance bin in the preset scanning distance bin at the scanning point, and calculate the corresponding average noise power and average echo signal power; the echo signal power is the signal power received after the electromagnetic wave emitted by the phased array radar is reflected by the sun; calculate the signal-to-noise ratio of the solar noise signal received at the scanning point according to the average noise power and the average echo signal power.

[0124] The pointing calibration device for a radar antenna provided by an embodiment of the present application can execute the technical solutions shown in the above method embodiments, and its implementation principle and beneficial effects are similar, and will not be elaborated here.

[0125] Further, based on the above embodiments, the sun position determination module 62 is specifically configured to generate a signal-to-noise ratio matrix diagram based on the signal-to-noise ratio of the solar noise signal received at each scanning point; the signal-to-noise ratio matrix diagram is used to describe the signal-to-noise ratio values of all scanning points within the preset range; determine the signal-to-noise ratio peak value and the actual elevation angle and actual azimuth angle of the signal point corresponding to the signal-to-noise ratio peak value from the signal-to-noise ratio matrix diagram; the actual elevation angle and the actual azimuth angle are used to represent the actual sun position.

[0126] The pointing calibration device for a radar antenna provided by an embodiment of the present application can execute the technical solutions shown in the above method embodiments, and its implementation principle and beneficial effects are similar, and will not be elaborated here.

[0127] Further, based on the above embodiments, the correction value determination module 63 is specifically configured to calculate the elevation angle correction value of the radar antenna according to the actual elevation angle and the theoretical elevation angle; calculate the azimuth angle correction value of the radar antenna according to the actual azimuth angle and the theoretical azimuth angle.

[0128] The pointing calibration device for a radar antenna provided by an embodiment of the present application can execute the technical solutions shown in the above method embodiments, and its implementation principle and beneficial effects are similar, and will not be elaborated here.

[0129] Further, based on the above embodiments, the pointing calibration module 64 is specifically configured to obtain the initial pitch angle and the initial azimuth angle of the radar antenna; compensate the pitch angle correction value to the initial pitch angle to obtain the target pitch angle; compensate the azimuth angle correction value to the initial azimuth angle to obtain the target azimuth angle; and perform pointing calibration processing on the radar antenna through a control command generated based on the target pitch angle and the target azimuth angle.

[0130] The pointing calibration device for a radar antenna provided by an embodiment of the present application can execute the technical solutions shown in the above method embodiments, and its implementation principle and beneficial effects are similar, and will not be described in detail here.

[0131] Further, based on the above embodiments, the radar scanning module 61 can also be configured to use a phased array radar to mechanically scan the sun within a first preset azimuth angle and electronically scan the sun within a first preset pitch angle, and determine the signal-to-noise ratio of the sun noise signal received by each scanning point within a first preset range; the first preset azimuth angle is less than the preset azimuth angle; the first preset pitch angle is less than the preset pitch angle.

[0132] The sun position determination module 62 can also be configured to determine a first actual sun position based on the signal-to-noise ratio of the sun noise signal received by each scanning point within the first preset range.

[0133] The correction value determination module 63 can also be configured to calculate a first pointing correction value of the radar antenna according to the theoretical sun position and the first actual sun position.

[0134] The pointing calibration module 64 can also be configured to perform pointing calibration processing on the radar antenna based on the first pointing correction value.

[0135] The pointing calibration device for a radar antenna provided by an embodiment of the present application can execute the technical solutions shown in the above method embodiments, and its implementation principle and beneficial effects are similar, and will not be described in detail here.

[0136] Further, based on the above embodiments, refer to Figure 7 , which is a schematic structural diagram of another embodiment of the pointing calibration device for a radar antenna provided by the present application. As Figure 7 shown, the device 60 can also include a theoretical sun position determination module 65.

[0137] The theoretical sun position determination module 65 is configured to perform time conversion based on the acquired time data to calculate the Julian century number; calculate the theoretical sun position based on the Julian century number, the longitude and latitude of the radar antenna; the theoretical sun position includes a theoretical pitch angle and a theoretical azimuth angle.

[0138] The pointing calibration device for a radar antenna provided by an embodiment of the present application can execute the technical solution shown in the foregoing method embodiment. The implementation principle and beneficial effects are similar, and will not be elaborated here.

[0139] Refer to Figure 8 , which is a schematic structural diagram of an embodiment of an electronic device provided by an embodiment of the present application. The electronic device 80 may include: a processor 81 and a memory 82.

[0140] Among them, the processor 81 is communicatively connected to the memory 82, and the memory 82 is used to store computer-executable instructions; the processor 81 is configured to execute the technical solution in any of the foregoing method embodiments by executing the computer-executable instructions stored in the memory 82.

[0141] Optionally, the memory 82 can be either independent or integrated with the processor 81. Optionally, when the memory 82 is a device independent of the processor 81, the electronic device 80 may further include: a bus for connecting the above-mentioned devices.

[0142] This electronic device is used to execute the technical solution in any of the foregoing method embodiments. The implementation principle and technical effects are similar and will not be elaborated here.

[0143] An embodiment of the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above method. The implementation principle and technical effects are similar and will not be elaborated here.

[0144] It should be noted that the various embodiments in this specification are described in a progressive manner. The same or similar parts among the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For the relevant parts, refer to the partial description of the method embodiment. The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components referred to as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative work.

[0145] As described above, it is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pointing calibration method for a radar antenna, characterized in that, The method includes: Mechanically scanning the sun within a preset azimuth angle and electronically scanning the sun within a preset elevation angle by using a phased array radar to determine the signal-to-noise ratio of the sun noise signal received at each scanning point within a preset range; the preset range includes the preset azimuth angle and the preset elevation angle and is centered on the theoretical sun position; Determining the actual sun position based on the signal-to-noise ratio of the sun noise signal received at each scanning point within the preset range; Calculating a target correction value of the radar antenna according to the theoretical sun position and the actual sun position; Performing pointing calibration processing on the radar antenna based on the target correction value.

2. The method according to claim 1, characterized in that, For each scanning point within the preset range, the step of mechanically scanning the sun within a preset azimuth angle and electronically scanning the sun within a preset elevation angle by using a phased array radar to determine the signal-to-noise ratio of the sun noise signal received at each scanning point within the preset range includes: Adjusting the beam elevation angle for electronic scanning through a phased array phase shifter in the phased array radar, and controlling the phased array radar to adjust the beam azimuth angle for mechanical scanning through a servo motor, and pointing the beam of the phased array radar at the scanning point; Collecting the noise power and the echo signal power corresponding to the sun noise signal received at each scanning distance bin in a preset scanning distance bin for the scanning point, and calculating the corresponding average noise power and average echo signal power; the echo signal power is the signal power received after the electromagnetic wave emitted by the phased array radar is reflected by the sun; Calculating the signal-to-noise ratio of the sun noise signal received at the scanning point according to the average noise power and the average echo signal power.

3. The method according to claim 1, wherein The step of determining the actual sun position based on the signal-to-noise ratio of the sun noise signal received at each scanning point within the preset range includes: Generating a signal-to-noise ratio matrix diagram based on the signal-to-noise ratio of the sun noise signal received at each scanning point; the signal-to-noise ratio matrix diagram is used to describe the signal-to-noise ratio values of all scanning points within the preset range; Determining the signal-to-noise ratio peak value and the actual elevation angle and actual azimuth angle of the signal point corresponding to the signal-to-noise ratio peak value from the signal-to-noise ratio matrix diagram; the actual elevation angle and the actual azimuth angle are used to represent the actual sun position.

4. The method according to claim 1, characterized in that, The method for determining the theoretical sun position includes: Performing time conversion based on the acquired time data to calculate the Julian century number; Calculating the theoretical sun position based on the Julian century number, the longitude and latitude of the radar antenna; the theoretical sun position includes a theoretical elevation angle and a theoretical azimuth angle.

5. The method according to any one of claims 1 to 4, characterized in that, The step of calculating a target correction value of the radar antenna according to the theoretical sun position and the actual sun position includes: Calculating a pitch angle correction value of the radar antenna according to the actual elevation angle and the theoretical elevation angle; Calculating an azimuth angle correction value of the radar antenna according to the actual azimuth angle and the theoretical azimuth angle.

6. The method according to claim 5, wherein The step of performing pointing calibration processing on the radar antenna based on the target correction value includes: Obtaining the initial elevation angle and initial azimuth angle of the radar antenna; Compensating the pitch angle correction value to the initial elevation angle to obtain a target elevation angle; Compensate the azimuth correction value to the initial azimuth to obtain the target azimuth; Perform pointing calibration processing on the radar antenna through a control instruction generated based on the target elevation angle and the target azimuth.

7. The method according to claim 1, wherein The method further includes: Using a phased array radar to mechanically scan the sun within a first preset azimuth angle and electronically scan the sun within a first preset elevation angle, and determining the signal-to-noise ratio of the sun noise signal received at each scan point within a first preset range; the first preset azimuth angle is less than the preset azimuth angle; the first preset elevation angle is less than the preset elevation angle; Based on the signal-to-noise ratio of the sun noise signal received at each scan point within the first preset range, determining a first actual sun position; Calculating a first pointing correction value of the radar antenna according to the theoretical sun position and the first actual sun position; Performing pointing calibration processing on the radar antenna based on the first pointing correction value.

8. A pointing calibration device for a radar antenna, characterized in that, Includes: A radar scanning module, configured to use a phased array radar to mechanically scan the sun within a preset azimuth angle and electronically scan the sun within a preset elevation angle, and determine the signal-to-noise ratio of the sun noise signal received at each scan point within a preset range; the preset range includes the preset azimuth angle and the preset elevation angle and is centered on the theoretical sun position; A sun position determination module, configured to determine the actual sun position based on the signal-to-noise ratio of the sun noise signal received at each scan point within the preset range; A correction value determination module, configured to calculate the pointing correction value of the radar antenna according to the theoretical sun position and the actual sun position; A pointing calibration module, configured to perform pointing calibration processing on the radar antenna based on the pointing correction value.

9. An electronic device, characterized in that, The device includes: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, Computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of claims 1 to 7.

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