Wide-beam scaling method, apparatus, computing device, storage medium, and program

Abstract

The application discloses a wide-beam calibration method, device, computing equipment, storage medium and program, and belongs to the field of radar detection. The wide-beam calibration method comprises the following steps: setting a target dual-polarization phased array weather radar to have the same beam pointing direction in a narrow-transmitting and narrow-receiving mode and a wide-transmitting and narrow-receiving mode, and making the wide-beam mode and the narrow-beam mode work alternately; acquiring a sky echo detected by the target dual-polarization phased array weather radar; comparing a wide-transmitting mode echo and a narrow-transmitting mode echo to obtain a correction value of the wide-beam; and calibrating the wide-beam of the target dual-polarization phased array weather radar according to the correction value of the wide-beam. The wide-beam calibration method can be directly calibrated after the radar is erected, and the calibration process is neither limited by a test site nor strictly required to have weather conditions. Only one weather process is used, and the calibration of multiple wide-beams can be performed at one time, so that the wide-beam calibration efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of radar detection, and more specifically to a wide-beam calibration method, apparatus, computing device, storage medium, and program. Background Technology

[0002] All radars require calibration to determine system parameters, thereby ensuring the accuracy and reliability of radar detection data. With the rapid development of radar detection technology, phased array radars are widely used in fields such as weather detection.

[0003] In practical applications, phased array weather radars typically employ two transmit / receive modes: wide transmit / narrow receive and narrow transmit / narrow receive. Narrow beams inherently possess deterministic radiation patterns during beamforming, and the amplitude distribution of different beams can be accurately predicted. Narrow beam calibration can be achieved through simulation calculations alone, making it relatively simple. However, wide beams exhibit uncertain amplitude distributions at different angles during radiation pattern formation, easily leading to beam irregularities and making wide beam calibration extremely complex.

[0004] Currently, there are two main methods for wide-beam calibration: one is microwave anechoic chamber testing and calibration, and the other is calibration using the zenith / light rain method. However, microwave anechoic chamber testing and calibration restricts the testing site to the microwave anechoic chamber, making calibration impossible once the radar is set up at the site, resulting in low efficiency for wide-beam calibration. Calibration using the zenith / light rain method, on the other hand, is extremely dependent on weather conditions. Without very uniform light rain or weak echo weather, radar calibration cannot be performed, further contributing to low efficiency in wide-beam calibration. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention aims to provide a wide beam calibration method, apparatus, computing device, storage medium and program to solve the problem of low efficiency in wide beam calibration.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Firstly, this application provides a wide-beam calibration method, comprising: The target dual-polarization phased array weather radar is set to have the same beam direction in both narrow transmit and narrow receive mode and wide transmit and narrow receive mode, and the wide beam mode and narrow beam mode work alternately. Acquire weather echoes detected by the target dual-polarization phased array weather radar, including wide-beam and narrow-beam echoes; calibrate the wide-beam of the target dual-polarization phased array weather radar based on the wide-beam correction value. By comparing the echoes of the wide-beam mode and the narrow-beam mode, the correction value for the wide beam is obtained. The wide beam of the target dual-polarization phased array weather radar is calibrated based on the correction value of the wide beam.

[0007] In the embodiments of this application, the target dual-polarization phased array weather radar is configured with the same beam pointing in both narrow-beam and wide-beam modes, and the wide-beam and narrow-beam modes operate alternately, including: A predetermined number of wave positions of the target dual-polarization phased array weather radar are set to narrow transmit and narrow receive mode, and one of the wave positions of the target dual-polarization phased array weather radar is set to wide transmit and narrow receive mode. The wave position of each narrow transmit and narrow receive mode is different from the wave position of the wide transmit and narrow receive mode. The narrow transmit / narrow receive mode for each wavelength is configured to have the same beam direction as the wide transmit / narrow receive mode, and the wide beam mode and narrow beam mode work alternately.

[0008] In the embodiments of this application, the wide-beam correction value is obtained by comparing the wide-beam echo and the narrow-beam echo, including: Determine the target azimuth of the weather echo, where the target azimuth is the azimuth where the echo data can fill all elevation angles; By comparing the wide-beam echo and narrow-beam echo corresponding to the target azimuth of the weather echo, the wide-beam correction value is obtained.

[0009] In the embodiments of this application, the wide-beam correction value is obtained by comparing the wide-beam echo and the narrow-beam echo, including: Identify all target wide beams to be calibrated; The target wide beam and all narrow beams are configured to different echo elevation angles to generate a beam configuration table between the target wide beam and all target narrow beams. Each narrow beam points in the same direction as one of the receiving narrow beams of the target wide beam. The beam configuration table includes the elevation layer, transmit beam direction, receive beam direction, and echo elevation angle. For each target wide beam, according to the beam configuration table, the echoes of each received beam pointing to the corresponding wide transmission mode and narrow transmission mode are compared to obtain the target wide beam correction value.

[0010] In the embodiments of this application, the wide beam of the target dual-polarization phased array weather radar is calibrated according to the wide beam correction value, including: In the presence of at least two target wide beams, each target wide beam of the dual-polarization phased array weather radar is calibrated sequentially based on the correction value of each target wide beam.

[0011] In the embodiments of this application, the wide-beam correction value is obtained by comparing the wide-beam echo and the narrow-beam echo, including: The difference between the echo intensity of the wide-beam echo and the echo intensity of the narrow-beam echo is used to obtain the weather echo intensity correction value for the wide beam. The differential reflectivity of the wide-beam echo is obtained by subtracting the differential reflectivity of the narrow-beam echo. Based on the wide-beam correction values, the wide-beam calibration of the target dual-polarization phased array weather radar is performed, including: The wide beam of the target dual-polarization phased array weather radar is calibrated based on the weather echo intensity correction value and the differential reflectivity correction value.

[0012] Secondly, this application provides a wide-beam calibration device, comprising: The radar setting module is used to set the target dual-polarization phased array weather radar to have the same beam direction in both the narrow transmit and narrow receive mode and the wide transmit and narrow receive mode, and to alternate between the wide beam mode and the narrow beam mode. The echo acquisition module is used to acquire weather echoes detected by the target dual-polarization phased array weather radar, including wide-range mode echoes and narrow-range mode echoes. The correction value acquisition module is used to compare the wide-beam echo and the narrow-beam echo to obtain the correction value for the wide beam. The wide-beam calibration module is used to calibrate the wide beam of a target dual-polarization phased array weather radar based on the wide-beam correction value.

[0013] Thirdly, this application provides a computing device, comprising: The memory is configured to store instructions; The processor is configured to retrieve instructions from memory and, when executing instructions, to implement the aforementioned wide-beam calibration method.

[0014] Fourthly, this application provides a machine-readable storage medium storing instructions that cause a machine to perform the wide beam calibration method described above.

[0015] Fifthly, this application provides a computer program product, which includes a computer program that, when executed by a processor, can implement the wide beam calibration method described above.

[0016] This application provides a wide-beam calibration method, comprising: setting the target dual-polarization phased array weather radar to have the same beam direction in both narrow-transmit / narrow-receive mode and wide-transmit / narrow-receive mode, and having the wide-beam mode and narrow-beam mode operate alternately; acquiring the weather echo detected by the target dual-polarization phased array weather radar; comparing the echo in the wide-transmit mode and the echo in the narrow-transmit mode to obtain a correction value for the wide beam; and calibrating the wide beam of the target dual-polarization phased array weather radar based on the correction value for the wide beam.

[0017] Compared with the prior art, the beneficial effects of the present invention are: The wide-beam calibration method of this application can be performed directly after the radar is installed, and only requires one weather event; a dual-polarization phased array weather radar can complete the calibration with just one weather detection. The calibration process is not limited by the test site or strict weather conditions, thus improving the efficiency of wide-beam calibration. Furthermore, this application utilizes the characteristic that antenna data is a volume target, which is large and easily fills all beams, allowing for the simultaneous calibration of multiple wide beams, further improving the efficiency of wide-beam calibration. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an example diagram of the ideal wide beam direction according to an embodiment of the present invention; Figure 2 This is an example diagram of the actual direction of the wide beam according to an embodiment of the present invention; Figure 3 This is a flowchart of a wide-beam calibration method according to an embodiment of the present invention; Figure 4 This is an example diagram of obtaining weather echoes according to an embodiment of the present invention; Figure 5 This is an example diagram of the transmission beam distribution according to an embodiment of the present invention; Figure 6 This is an example diagram of the receiving beam distribution according to an embodiment of the present invention; Figure 7 This is an example diagram of the echo intensity distribution in a narrow transmit / narrow receive mode and a wide transmit / narrow receive mode according to an embodiment of the present invention; Figure 8 This is an example diagram of the differential reflectance distribution of a narrow-transmission narrow-reception mode and a wide-transmission narrow-reception mode according to an embodiment of the present invention; Figure 9 This is an example diagram of the wide-beam weather echo intensity correction value obtained according to an embodiment of the present invention; Figure 10 This is an example diagram of the differential reflectivity correction value of a wide beam obtained according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of a wide-beam calibration device according to an embodiment of the present invention. Detailed Implementation

[0019] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the present invention.

[0020] The components of the embodiments of the invention described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] In the following, the terms “comprising,” “having,” and their cognates, which may be used in various embodiments of the invention, are intended only to indicate a particular feature, number, step, operation, element, component, or combination thereof, and should not be construed as excluding, firstly, the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations thereof.

[0022] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the invention pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of the invention.

[0024] Please see Figure 1 , Figure 1 This is an example diagram of the ideal wide beam direction according to an embodiment of the present invention.

[0025] Please see Figure 2 , Figure 2 This is an example diagram of the actual direction of a wide beam according to an embodiment of the present invention.

[0026] Weather radar is a quantitative detection device, requiring extremely high accuracy in the detected data. For example... Figure 1 As shown, ideally, the radar would emit a wide electromagnetic beam with a completely flat amplitude without fluctuations within the beam. This would prevent inaccurate detection data caused by the superposition of amplitude differences within the radar beam itself. However, as... Figure 2As shown, in actual detection scenarios, radar inevitably produces amplitude unevenness within the beam when forming a wide beam, which leads to inaccurate detection of weather echoes. Therefore, calibration correction is needed to address the amplitude fluctuations within the wide beam. For dual-polarization phased array weather radars, corrections need to be made for fluctuations within both horizontally and vertically polarized wide beams; otherwise, the ZDR (Differential Reflectivity) of wide beam detection will also fluctuate.

[0027] If a microwave anechoic chamber is used to test the direction of a wide beam, the amplitude value of each angle is marked according to the angular interval of the received beam, thus obtaining the amplitude compensation value for the corresponding beam. However, microwave anechoic chamber testing and calibration restricts the test site to the anechoic chamber; once the radar is installed at the site, calibration cannot be carried out. Furthermore, even if the radar is compensated using an anechoic chamber before leaving the factory, changes may occur during the radar's installation in the field due to transportation and on-site disassembly and assembly, necessitating recalibration.

[0028] If the zenith method / light rain method is used for statistical compensation, due to the relatively uniform intensity distribution of light rain or weak weather, the echo intensity and differential reflectivity at various elevation angles should be approximately consistent when the radar detects the echo of light rain or weak weather. If the echoes are inconsistent, it is determined that the fluctuation is caused by the radar beam itself. The amplitude fluctuation and ZDR fluctuation are statistically analyzed and used as the compensation values ​​for wide beam amplitude fluctuation and ZDR fluctuation. However, the zenith method / light rain method has extremely high requirements for weather conditions, especially in summer when it is difficult to find very uniform light rain or weak echo weather for calibration work.

[0029] Example 1 Please see Figure 3 , Figure 3 This is a flowchart of a wide-beam calibration method according to an embodiment of the present invention. Figure 3 Wide-beam calibration methods include: S110 sets the target dual-polarization phased array weather radar to have the same beam direction in both narrow transmit / narrow receive mode and wide transmit / narrow receive mode, and the wide beam mode and narrow beam mode work alternately.

[0030] The target dual-polarization phased array weather radar is a phased array weather radar that requires wide-beam calibration, but this is not a limitation here. Due to the flexible beam control of dual-polarization phased array weather radar, the target dual-polarization phased array weather radar is configured with the beam pointing in both narrow-transmit / narrow-receive and wide-transmit / narrow-receive modes, and the wide-beam mode and narrow-beam mode operate alternately. The time difference between the narrow-transmit / narrow-receive mode and the wide-transmit / narrow-receive mode depends only on the azimuth dwell time of the wide-beam and narrow-beam modes. The azimuth dwell time of phased array radar is typically only a few hundred milliseconds, enabling the wide-beam and narrow-beam modes to detect the same target almost simultaneously, facilitating a comparison of the detection performance of the narrow-transmit / narrow-receive mode and the wide-transmit / narrow-receive mode.

[0031] S120: Acquire weather echoes detected by the target dual-polarization phased array weather radar, including wide-range mode echoes and narrow-range mode echoes.

[0032] It's important to understand that statistical compensation using the zenith method / light rain method requires extremely specific weather conditions, demanding very uniform light rain or weak echo weather. However, in this embodiment, after the target dual-polarization phased array weather radar is installed, subsequent wide-beam calibration can be completed using the weather echo detected by the radar during any single weather event, reducing the weather condition requirements. Furthermore, in this embodiment, radar calibration can still be performed after the target dual-polarization phased array weather radar is installed, which, compared to using a microwave anechoic chamber to test the wide-beam pattern, is not limited by location.

[0033] S130 compares the echo in wide-beam mode with the echo in narrow-beam mode to obtain the correction value for wide beam.

[0034] The target dual-polarization phased array weather radar is set to have the same beam direction in both narrow transmit / narrow receive mode and wide transmit / narrow receive mode, and the wide beam mode and narrow beam mode work alternately. The time difference between the narrow transmit / narrow receive mode and the wide transmit / narrow receive mode is about 200ms. It can be considered that the narrow transmit / narrow receive mode and the wide transmit / narrow receive mode detect almost simultaneously. Therefore, the echo of the wide transmit mode and the echo of the narrow transmit mode can be directly compared. By comparing the detection performance, the correction value of the wide beam can be obtained.

[0035] S140 calibrates the wide beam of the target dual-polarization phased array weather radar based on the wide beam correction value.

[0036] Based on the correction value of the wide beam, the correction value of the wide beam is applied back to the original measurement value of the wide beam to calibrate the wide beam of the target dual-polarization phased array weather radar. Since the antenna data detected by the target dual-polarization phased array weather radar in this embodiment is a volume target, and the target is large and easily fills all beams, this embodiment can perform calibration of multiple wide beams at once.

[0037] This application provides a wide-beam calibration method, comprising: setting the target dual-polarization phased array weather radar to a narrow-transmit / narrow-receive mode with the same beam pointing as the wide-transmit / narrow-receive mode, and alternating between the wide-beam and narrow-beam modes; acquiring the weather echo detected by the target dual-polarization phased array weather radar; comparing the echo from the wide-transmit mode with the echo from the narrow-transmit mode to obtain a correction value for the wide beam; and calibrating the wide beam of the target dual-polarization phased array weather radar based on the correction value. This wide-beam calibration method can be performed directly after the radar is installed, and only requires one weather event; the dual-polarization phased array weather radar can complete the calibration with just one weather event detection. The calibration process is not limited by the test site or strict weather conditions, thus improving the efficiency of wide-beam calibration. Furthermore, this application utilizes the characteristic that antenna data is a volume target, which is large and easily fills all beams, allowing for the simultaneous calibration of multiple wide beams, further improving the efficiency of wide-beam calibration.

[0038] In the embodiments of this application, the target dual-polarization phased array weather radar is configured with the same beam pointing in both narrow-beam and wide-beam modes, and the wide-beam and narrow-beam modes operate alternately, including: A predetermined number of wave positions of the target dual-polarization phased array weather radar are set to narrow transmit and narrow receive mode, and one of the wave positions of the target dual-polarization phased array weather radar is set to wide transmit and narrow receive mode. The wave position of each narrow transmit and narrow receive mode is different from the wave position of the wide transmit and narrow receive mode. The narrow transmit / narrow receive mode for each wavelength is configured to have the same beam direction as the wide transmit / narrow receive mode, and the wide beam mode and narrow beam mode work alternately.

[0039] A predetermined number of wave positions of the target dual-polarization phased array weather radar are set to narrow transmit / narrow receive mode, and one wave position of the target dual-polarization phased array weather radar is set to wide transmit / narrow receive mode. The wave positions in the narrow transmit / narrow receive mode and the wide transmit / narrow receive mode are different. The predetermined number is set according to actual needs and is not limited here. For ease of understanding, the embodiment of this application uses an 11-wave position mode, i.e., the predetermined number is 10. The first 10 wave positions are set to narrow transmit / narrow receive mode, and the 11th wave position is set to wide transmit / narrow receive mode. The beam pointing of the narrow transmit / narrow receive mode for each wave position is set to be the same as that of the wide transmit / narrow receive mode, ensuring that the beam pointing of the narrow transmit / narrow receive mode coincides with that of the wide transmit / narrow receive mode. The wide beam mode and the narrow beam mode operate alternately, with a time difference of approximately 200ms, which can be considered as almost simultaneous detection.

[0040] Please see Figure 4 , Figure 4 This is an example diagram of obtaining weather echoes according to an embodiment of the present invention.

[0041] When calibrating a target dual-polarization phased array weather radar, weather echoes are detected using the target dual-polarization phased array weather radar during weather conditions. Figure 4 As shown, the blue irregular polygon represents the weather process. It is only required that the volume of the weather echo is greater than the elevation angle range of the radar detection. The detection performance of narrow transmit and narrow receive modes and wide transmit and narrow receive modes can be compared based on the weather echo, thereby achieving wide beam calibration.

[0042] In the embodiments of this application, the wide-beam correction value is obtained by comparing the wide-beam echo and the narrow-beam echo, including: Determine the target azimuth of the weather echo, where the target azimuth is the azimuth where the echo data can fill all elevation angles; By comparing the wide-beam echo and narrow-beam echo corresponding to the target azimuth of the weather echo, the wide-beam correction value is obtained.

[0043] After detecting weather, the dual-polarization phased array weather radar acquires weather echoes. The target azimuth of the weather echoes is determined, where the echo data fills all elevation angles; that is, when the weather echo is at the target azimuth, detection data is acquired at all echo elevation angles. The echo intensity and differential reflectivity corresponding to the target azimuth are extracted. The wide-beam correction value is obtained by comparing the wide-beam mode echo and narrow-beam mode echo corresponding to the target azimuth of the weather echo.

[0044] In the embodiments of this application, the wide-beam correction value is obtained by comparing the wide-beam echo and the narrow-beam echo, including: Identify all target wide beams to be calibrated; The target wide beam and all narrow beams are configured to different echo elevation angles to generate a beam configuration table between the target wide beam and all target narrow beams. Each narrow beam points in the same direction as one of the receiving narrow beams of the target wide beam. The beam configuration table includes the elevation layer, transmit beam direction, receive beam direction, and echo elevation angle. For each target wide beam, according to the beam configuration table, the echoes of each received beam pointing to the corresponding wide transmission mode and narrow transmission mode are compared to obtain the target wide beam correction value.

[0045] Since the antenna data detected by the dual-polarization phased array weather radar in this embodiment is a volume target, and the target is large and easy to fill all beams, this embodiment can perform calibration of multiple wide beams at once to determine all target wide beams to be calibrated.

[0046] The echo elevation angle is the detection elevation angle of the target dual-polarization phased array weather radar. In this embodiment, the target dual-polarization phased array weather radar is set to have the same beam direction in both narrow-transmission / narrow-reception and wide-transmission / narrow-reception modes. The target wide beam and all narrow beams are configured to different echo elevation angles, enabling simultaneous display of data from both modes, facilitating data analysis. For ease of understanding, this embodiment uses a wide beam with a calibration beamwidth of 18° and a beam range of -6.75 to 11.25° as an example. The beam configuration table between the target wide beam and all target narrow beams is generated as follows: Table 1: Beam configuration table.

[0047] Figure 5 This is an example diagram of the transmission beam distribution according to an embodiment of the present invention.

[0048] Figure 6 This is an example diagram of the receiving beam distribution according to an embodiment of the present invention.

[0049] like Figure 5 and Figure 6 As shown, the wide-beam mode and narrow-beam mode operate alternately. The time difference between the narrow-transmit / narrow-receive mode and the wide-transmit / narrow-receive mode is approximately 200ms, which can be considered as almost simultaneous detection. The generated beam configuration table includes the elevation layer number, transmit beam direction, receive beam direction, and echo elevation angle. For each target wide beam, according to the beam configuration table, the difference between the wide-transmit mode echo and the narrow-transmit mode echo corresponding to each receive beam direction is calculated to obtain the target wide beam correction value. In this embodiment, based on the beam configuration table, the difference between the wide-transmit mode echo and the narrow-transmit mode echo corresponding to all receive beams, including -3.75°, -2.25°, -0.75°, 0.75°, 2.25°, 3.75°, 5.25°, 6.75°, 8.25°, and 9.75°, is calculated sequentially to obtain the target wide beam correction value.

[0050] In the embodiments of this application, the wide beam of the target dual-polarization phased array weather radar is calibrated according to the wide beam correction value, including: In the presence of at least two target wide beams, each target wide beam of the dual-polarization phased array weather radar is calibrated sequentially based on the correction value of each target wide beam.

[0051] In practical detection scenarios, the target wide-beam can be calibrated according to actual needs. The target dual-polarization phased array weather radar can be configured to acquire the weather echo detected by the target dual-polarization phased array weather radar, and to compare the wide-transmit mode echo with the narrow-transmit mode echo to obtain the correction value for the wide-beam. When at least two target wide-beams exist, each target wide-beam of the target dual-polarization phased array weather radar is calibrated sequentially based on the correction value of each target wide-beam, thus achieving rapid calibration of multiple wide-transmit and narrow-receive modes in practical applications.

[0052] In the embodiments of this application, the wide-beam correction value is obtained by comparing the wide-beam echo and the narrow-beam echo, including: The difference between the echo intensity of the wide-beam echo and the echo intensity of the narrow-beam echo is used to obtain the weather echo intensity correction value for the wide beam. The differential reflectivity of the wide-beam echo is obtained by subtracting the differential reflectivity of the narrow-beam echo. Based on the wide-beam correction values, the wide-beam calibration of the target dual-polarization phased array weather radar is performed, including: The wide beam of the target dual-polarization phased array weather radar is calibrated based on the weather echo intensity correction value and the differential reflectivity correction value.

[0053] Figure 7 This is an example diagram showing the echo intensity distribution of a narrow transmit / narrow receive mode and a wide transmit / narrow receive mode according to an embodiment of the present invention.

[0054] Figure 8 This is an example diagram of the differential reflectance distribution of narrow transmit / narrow receive mode and wide transmit / narrow receive mode according to an embodiment of the present invention.

[0055] The target dual-polarization phased array weather radar detects weather conditions to obtain weather echoes. For example... Figure 7 and Figure 8 As shown in the example diagrams of echo intensity distribution for narrow-transmit / narrow-receive and wide-transmit / narrow-receive modes, weather echoes are extracted to obtain the echo intensity of the wide-transmit mode echo and the echo intensity of the narrow-transmit mode echo. Similarly, based on the example diagrams of differential reflectance distribution for narrow-transmit / narrow-receive and wide-transmit / narrow-receive modes, weather echoes are extracted to obtain the differential reflectance of the wide-transmit mode echo and the differential reflectance of the narrow-transmit mode echo.

[0056] Figure 9 This is an example diagram of the wide-beam weather echo intensity correction value obtained according to an embodiment of the present invention.

[0057] The difference between the echo intensity of the wide-beam echo mode and the echo intensity of the narrow-beam echo mode is used to obtain the corrected value for the weather echo intensity of the wide-beam echo. For example... Figure 9 As shown, the blue curve represents the echo intensity of the narrow-beam echo, the yellow curve represents the echo intensity of the wide-beam echo, and the red curve represents the corrected value for the weather echo intensity of the wide-beam echo.

[0058] Figure 10 This is an example diagram of the differential reflectivity correction value of a wide beam obtained according to an embodiment of the present invention.

[0059] The differential reflectivity of the wide-beam echo is obtained by subtracting the differential reflectivity of the narrow-beam echo. For example... Figure 10 As shown, the blue curve represents the differential reflectivity of the narrow-range mode echo, the yellow curve represents the differential reflectivity of the wide-range mode echo, and the red curve represents the differential reflectivity correction value for the obtained wide-range beam. Based on the weather echo intensity correction value and the differential reflectivity correction value, the weather echo intensity correction value is applied back to the measured echo intensity of the wide-range beam, and the differential reflectivity correction value is applied back to the differential reflectivity of the wide-range beam, thus calibrating the wide-range beam of the target dual-polarization phased array weather radar.

[0060] Example 2 Please see Figure 11 , Figure 11 This is a schematic diagram of the structure of a wide-beam calibration device according to an embodiment of the present invention. Figure 11 The wide beam calibration device 200 in the middle includes: Radar setting module 210 is used to set the target dual polarization phased array weather radar to have the same beam direction in narrow transmit and narrow receive mode and wide transmit and narrow receive mode, and to work in the wide beam mode and narrow beam mode alternately. The echo acquisition module 220 is used to acquire weather echoes detected by the target dual-polarization phased array weather radar, wherein the weather echoes include wide-range mode echoes and narrow-range mode echoes. The correction value acquisition module 230 is used to compare the wide-beam echo and the narrow-beam echo to obtain the correction value for the wide beam. Wide beam calibration module 240 is used to calibrate the wide beam of a target dual-polarization phased array weather radar based on the wide beam correction value.

[0061] In embodiments of this application, the radar setting module 210 includes: The transmit / receive mode setting submodule is used to set a preset number of wave positions of the target dual-polarization phased array weather radar to narrow transmit / narrow receive mode, and to set one of the wave positions of the target dual-polarization phased array weather radar to wide transmit / narrow receive mode. The wave position of each narrow transmit / narrow receive mode is different from the wave position of the wide transmit / narrow receive mode. The beam pointing setting submodule is used to set the beam pointing of the narrow transmit / narrow receive mode corresponding to the wide transmit / narrow receive mode for each wavelength to be the same, and the wide beam mode and narrow beam mode work alternately.

[0062] In the embodiments of this application, the correction value obtaining module 230 includes: The azimuth determination submodule is used to determine the target azimuth of weather echoes, where the target azimuth is the azimuth where the echo data can fill all elevation angles; The wide beam correction value submodule is used to compare the wide-transmission mode echo and the narrow-transmission mode echo corresponding to the target azimuth of the weather echo to obtain the wide beam correction value.

[0063] In the embodiments of this application, the correction value obtaining module 230 includes: The target wide beam determination submodule is used to determine the wide beams of all targets to be calibrated; The configuration table generation submodule is used to configure the target wide beam and all narrow beams to different echo elevation angles, and generate a beam configuration table between the target wide beam and all target narrow beams. Each narrow beam and one of the receiving narrow beams of the target wide beam point in the same direction. The beam configuration table includes the elevation layer, transmit beam direction, receive beam direction and echo elevation angle. The wide beam correction value acquisition submodule is used to compare the wide transmission mode echo and narrow transmission mode echo corresponding to each received beam with the beam configuration table for each target wide beam to obtain the target wide beam correction value.

[0064] In the embodiments of this application, the wide beam calibration module 240 is further configured to calibrate each target wide beam of the target dual polarization phased array weather radar sequentially according to the correction value of each target wide beam when there are at least two target wide beams.

[0065] In the embodiments of this application, the correction value obtaining module 230 includes: The Weather Echo Intensity Correction Submodule is used to subtract the echo intensity of the wide-beam echo from the narrow-beam echo to obtain the wide-beam weather echo intensity correction value. The differential reflectivity correction value submodule is used to subtract the differential reflectivity of the wide-beam echo from the narrow-beam echo to obtain the differential reflectivity correction value for the wide beam. The wide-beam calibration module 240 is also used to calibrate the wide beam of the target dual-polarization phased array weather radar based on the weather echo intensity correction value and the differential reflectivity correction value.

[0066] This application embodiment also provides a computing device, including: The memory is configured to store instructions; The processor is configured to retrieve instructions from memory and to implement the aforementioned wide-beam calibration method when executing instructions.

[0067] In this embodiment, the radar setting module 210, echo acquisition module 220, correction value acquisition module 230, and wide beam calibration module 240 are all stored as program units in the memory, and the processor executes the above-mentioned program units stored in the memory to realize the corresponding functions.

[0068] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and the wide-beam calibration method described above can be implemented by adjusting the kernel parameters.

[0069] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0070] This application also provides a machine-readable storage medium storing instructions that cause a machine to perform the wide beam calibration method described above.

[0071] This application also provides a computer program product, which includes a computer program that, when executed by a processor, can implement the wide beam calibration method described above.

[0072] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0073] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0074] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0075] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0076] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0077] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0078] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0079] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0080] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A wide-beam calibration method, characterized in that, include: The target dual-polarization phased array weather radar is set to have the same beam direction in both the narrow transmit and narrow receive mode and the wide transmit and narrow receive mode, and the wide beam mode and the narrow beam mode work alternately. Acquire the weather echo detected by the target dual-polarization phased array weather radar, wherein the weather echo includes wide-range mode echo and narrow-range mode echo; The wide-beam echo and the narrow-beam echo are compared to obtain the correction value for the wide beam. The wide beam of the target dual-polarization phased array weather radar is calibrated based on the correction value of the wide beam.

2. The wide-beam calibration method according to claim 1, characterized in that, The step of setting the target dual-polarization phased array weather radar to a narrow-beam transmit / narrow-beam receive mode and a wide-beam transmit / narrow-beam receive mode with the same beam direction, and having the wide-beam mode and narrow-beam mode operate alternately, includes: A predetermined number of wave positions of the target dual-polarization phased array weather radar are set to narrow transmit and narrow receive mode, and one of the wave positions of the target dual-polarization phased array weather radar is set to wide transmit and narrow receive mode. The wave position of each narrow transmit and narrow receive mode is different from the wave position of the wide transmit and narrow receive mode. The narrow transmit / narrow receive mode for each wavelength is configured to have the same beam direction as the wide transmit / narrow receive mode, and the wide beam mode and the narrow beam mode work alternately.

3. The wide-beam calibration method according to claim 1, characterized in that, The step of comparing the wide-beam echo and the narrow-beam echo to obtain the wide-beam correction value includes: Determine the target azimuth of the weather echo, wherein the target azimuth is the azimuth where the echo data can fill all elevation angles; By comparing the wide-beam mode echo and the narrow-beam mode echo corresponding to the target azimuth of the weather echo, a wide-beam correction value is obtained.

4. The wide-beam calibration method according to claim 1, characterized in that, The step of comparing the wide-beam echo and the narrow-beam echo to obtain the wide-beam correction value includes: Identify all target wide beams to be calibrated; The target wide beam and all narrow beams are configured to different echo elevation angles to generate a beam configuration table between the target wide beam and all target narrow beams. Each narrow beam and one of the receiving narrow beams of the target wide beam point in the same direction. The beam configuration table includes the elevation angle layer, transmit beam direction, receive beam direction and echo elevation angle. For each target wide beam, according to the beam configuration table, the echo of the wide transmission mode and the echo of the narrow transmission mode corresponding to each received beam are compared to obtain the wide beam correction value of the target wide beam.

5. The wide-beam calibration method according to claim 4, characterized in that, The calibration of the wide beam of the target dual-polarization phased array weather radar based on the wide beam correction value includes: In the presence of at least two target wide beams, each target wide beam of the dual polarization phased array weather radar is calibrated sequentially according to the correction value of each target wide beam.

6. The wide-beam calibration method according to claim 1, characterized in that, The step of comparing the wide-beam echo and the narrow-beam echo to obtain the wide-beam correction value includes: The difference between the echo intensity of the wide-beam echo and the echo intensity of the narrow-beam echo is used to obtain the weather echo intensity correction value for the wide beam. The differential reflectivity of the wide-beam echo is obtained by subtracting the differential reflectivity of the narrow-beam echo. The calibration of the wide beam of the target dual-polarization phased array weather radar based on the wide beam correction value includes: The wide beam of the target dual-polarization phased array weather radar is calibrated based on the weather echo intensity correction value and the differential reflectivity correction value.

7. A wide-beam calibration device, characterized in that, include: The radar setting module is used to set the target dual-polarization phased array weather radar to have the same beam direction in both the narrow transmit and narrow receive mode and the wide transmit and narrow receive mode, and the wide beam mode and the narrow beam mode work alternately. The echo acquisition module is used to acquire the weather echo detected by the dual polarization phased array weather radar of the target, wherein the weather echo includes wide-range mode echo and narrow-range mode echo; The correction value acquisition module is used to compare the wide-beam echo and the narrow-beam echo to obtain the wide-beam correction value. A wide-beam calibration module is used to calibrate the wide beam of the target dual-polarization phased array weather radar according to the correction value of the wide beam.

8. A computing device, characterized in that, include: The memory is configured to store instructions; The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the wide-beam calibration method according to any one of claims 1 to 6.

9. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions for causing the machine to perform the wide-beam calibration method according to any one of claims 1 to 6.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, can implement the wide beam calibration method according to any one of claims 1 to 6.

Images