Weather radar speed spectrum width test system and method

Abstract

The invention relates to the technical field of radar testing, and discloses a weather radar speed spectrum width testing system and method.The weather radar speed spectrum width testing system comprises a weather radar, detection devices and a ground console, the detection devices comprise the first detection device and the second detection device, and the first detection device comprises a first movement mechanism, a first fixing mechanism, a first measuring mechanism and a releasing mechanism; the second detection device comprises a second movement mechanism, a second fixing mechanism and a second measurement mechanism, the ground control console is provided with a wireless control module, a data receiving module and a data comparison module, and a first test is completed based on the weather radar, the first detection device and the ground control console; and completing a second test based on the weather radar, the first detection device, the second detection device and the ground console. The first test is completed based on the first detection device, and the second test is completed based on the first detection device and the second detection device, so that the radar test is more complete, and the accuracy is higher.

Description

Technical Field

[0001] The present invention relates to the field of radar testing technology, and in particular to a weather radar velocity spectrum width testing system and method. Background Art

[0002] The target of weather radar detection is precipitation. There are many water droplets (cloud droplets, raindrops) in the effective radiation volume of the radar. These water droplets are also moving under the action of air movement and gravity. The movement of water droplets reflects the movement of the atmosphere. Therefore, measuring the movement of these water droplets can understand the movement of the atmosphere. The velocity spectrum width measured by radar reflects the movement of the atmosphere. CN110068803A discloses an aerial calibration test device and method for radar equipment, including: a GPS receiver, a data transmission radio transmitter module, a data transmission radio receiver module, a guidance computer, a radar equipment and a data acquisition storage module; the output end of the GPS receiver is connected to the input end of the data transmission radio transmitter module; the output end of the data transmission radio receiver module is connected to the input end of the guidance computer; the output end of the guidance computer is connected to the input end of the radar equipment; the output end of the radar equipment is connected to the input end of the data acquisition storage module. The present invention uses a rotor drone to suspend a metal ball to realize aerial calibration test and calibration data collection, solves the problem that the ground calibration test is affected by ground clutter and the calibration accuracy is poor, can improve the calibration accuracy to within 1dB, and realize accurate calibration of the radar equipment system, but it has such a problem that the rotorcraft with the metal ball only plays a positioning role, and its spectrum width test relies on angle calculation, so the calculation amount is large, and there is only one test, the test result is less accurate, and the test content is more complicated; Therefore, there is an urgent need for a testing method that can accurately and simply test the velocity spectrum width of weather radar. Summary of the invention

[0003] The object of the present invention is to overcome one or more of the above-mentioned existing technical problems and to provide a weather radar velocity spectrum width testing system and method.

[0004] To achieve the above object, the present invention provides a weather radar velocity spectrum width testing system, comprising: Weather radars, detection devices and ground control consoles; The detection device comprises a first detection device and a second detection device, the first detection device comprises a first moving mechanism, a first fixing mechanism, a first measuring mechanism and a releasing mechanism, and the second detection device comprises a second moving mechanism, a second fixing mechanism and a second measuring mechanism; The ground control console is provided with a wireless control module, a data receiving module and a data comparison module; Control the first detection device and the second detection device to reach above the weather radar through the wireless control module; The data receiving module is used to receive data from the first measuring mechanism and the second measuring mechanism; The data comparison module is used to compare the data of the first measurement mechanism and the second measurement mechanism with the data obtained by the weather radar; Complete a first test based on the weather radar, the first detection device and the ground control console; A second test is completed based on the weather radar, the first detection device, the second detection device and the ground control console.

[0005] According to one aspect of the present invention, the first motion mechanism is a first rotorcraft, the first fixing mechanism and the second fixing mechanism are non-metallic ropes, the first measuring mechanism is a first metal ball, the release mechanism is arranged on one side of the first rotorcraft, and the first metal ball is connected to the release mechanism through a non-metallic rope.

[0006] According to one aspect of the present invention, the second motion mechanism is a second rotorcraft, the second measuring mechanism is a second metal ball, and the second metal ball is connected to the second rotorcraft via a non-metallic rope.

[0007] According to one aspect of the present invention, the first metal ball and the second metal ball are provided with GPS positioning modules, and the mass of the first metal ball is consistent with the mass of the second metal ball.

[0008] According to one aspect of the present invention, in a first test, the first detection device is arranged in a phased array radar beam of the weather radar; In the second test, the first detection device and the second detection device are arranged in the phased array radar beam of the weather radar, and the first detection device is obliquely above the second detection device.

[0009] To achieve the above object, the present invention provides a weather radar velocity spectrum width testing method, comprising: The weather radar is arranged with its antenna surface horizontally, and the first detection device is controlled to be above the weather radar through the ground control console; releasing the first metal ball by the release mechanism, and acquiring a first moving speed of the first metal ball and a second moving speed of the first rotorcraft; Based on the weather radar detecting and receiving the signal of the first metal ball, recording IQ data, and performing spectrum analysis on the IQ data to obtain a first velocity spectrum width; obtaining a first movement speed difference based on the first movement speed and the second movement speed, and completing a first test if the first movement speed difference is equal to the first speed spectrum width; When the first test is completed, controlling the second detection device to above the weather radar through the ground control console; Controlling the first rotorcraft to drive the first metal ball to rise and the second rotorcraft to drive the second metal ball to descend, and obtaining a third movement speed of the first metal ball and a fourth movement speed of the second metal ball; Based on the weather radar detecting and receiving the signals of the first metal ball and the second metal ball, recording IQ data, and performing spectrum analysis on the IQ data to obtain a second velocity spectrum width; Obtaining a second movement speed difference based on the third movement speed and the fourth movement speed, and if the second movement speed difference is equal to the second speed spectrum width, completing a second test, and if they are not equal, performing a retest; When both the first and second tests are completed, the weather radar velocity spectrum width test is completed.

[0010] According to one aspect of the present invention, during the first test, the first rotorcraft carries the first metal ball, the non-metallic rope between the first metal ball and the first rotorcraft is 1 meter long when the first metal ball is not released, and the first rotorcraft is 300 meters above the ground; Adjusting the positions of the first metal ball and the first rotorcraft so that they are simultaneously in the phased array radar beam of the weather radar, and the first rotorcraft and the first metal ball are visible on the display of the weather radar and are in the same radar radial distance library; The first metal ball is released by the release mechanism provided on the first rotorcraft, and the first metal ball falls until the first metal ball and the non-metallic rope of the first rotorcraft are fully unfolded.

[0011] According to one aspect of the present invention, when performing a first test, the first rotorcraft and the first metal ball are regarded as two targets in the weather radar; When the first metal ball is released, the first movement speed of the first metal ball is acquired through a GPS positioning module on the first metal ball, wherein the first movement speed is not equal to the second movement speed, the first movement speed increases continuously, the second movement speed is 0, and the first movement speed is greater than a speed resolution of the weather radar; The first movement speed difference is obtained based on the first movement speed and the second movement speed, wherein the formula is, ; in, is the first motion speed difference; is the first movement speed; is the second movement speed; It is determined whether the first motion speed difference is equal to the first speed spectrum width. If the first motion speed difference is equal to the first speed spectrum width, the first test is completed; if not, a retest is performed.

[0012] According to one aspect of the present invention, after the first test is completed, the position of the first rotorcraft is kept unchanged, the second rotorcraft is controlled by the ground control console, and the camera on the second rotorcraft is directed toward the first rotorcraft; The second rotorcraft approaches the first rotorcraft so that the first rotorcraft and the second rotorcraft are simultaneously in the phased array radar beam of the weather radar; The first rotorcraft and the second rotorcraft are 2 meters apart horizontally, the first rotorcraft is 300 meters above the ground, and the second rotorcraft is 295 meters above the ground.

[0013] According to one aspect of the present invention, when performing the second test, the first metal ball and the second metal ball are regarded as two targets in the weather radar; Controlling the first rotorcraft to drive the first metal ball to rise through the non-metallic rope through the ground control console, and obtaining the third movement speed of the first metal ball through the GPS positioning module on the first metal ball; Controlling the second rotorcraft to drive the second metal ball to rise through the non-metallic rope through the ground control console, and obtaining the fourth movement speed of the second metal ball through the GPS positioning module on the second metal ball; wherein the third movement speed is not equal to the fourth movement speed, and the third movement speed and the fourth movement speed are greater than the speed resolution of the weather radar; The second movement speed difference is obtained based on the third movement speed and the fourth movement speed, wherein the formula is, ; in, is the second motion speed difference; is the third movement speed; is the fourth movement speed; Determine whether the second motion speed difference is equal to the second speed spectrum width. If the second motion speed difference is equal to the second speed spectrum width, complete the second test. If not, perform a retest.

[0014] Based on this, the beneficial effects of the present invention are: controlling the first detection device to the top of the weather radar through the ground control console, releasing the first metal ball through the release mechanism, obtaining the first movement speed of the first metal ball and the second movement speed of the first rotorcraft, receiving the signal of the first metal ball based on the weather radar detection, recording IQ data, performing spectrum analysis with the IQ data, obtaining the first speed spectrum width, obtaining the first movement speed difference based on the first movement speed and the second movement speed, and completing the corresponding test by comparing whether the first speed spectrum width and the first movement speed difference are equal; Control the second detection device to the top of the weather radar through the ground control console, control the first rotorcraft to drive the first metal ball to rise and the second rotorcraft to drive the second metal ball to descend, obtain the third movement speed of the first metal ball and the fourth movement speed of the second metal ball, receive the signals of the first metal ball and the second metal ball based on the weather radar detection, record IQ data, perform spectrum analysis on the IQ data to obtain the second speed spectrum width, obtain the second movement speed difference based on the third movement speed and the fourth movement speed, and complete the corresponding test by comparing whether the second speed spectrum width and the second movement speed difference are equal; Through two tests, the weather radar is better tested whether it is working properly. Compared with the traditional technology that uses angle calculation for testing, this application uses speed for testing. This test is simpler and has lower calculation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a diagram of a weather radar velocity spectrum width test system according to an exemplary embodiment; Figure 2 is a flow chart of a method for testing a weather radar velocity spectrum width according to an exemplary embodiment; Figure 3 is a schematic diagram showing that the non-metallic rope is not fully unfolded in the first test according to an exemplary embodiment; Figure 4 is a schematic diagram showing a first test in which a non-metallic rope is fully deployed according to an exemplary embodiment; Figure 5 is a schematic diagram of a second test according to an exemplary embodiment. DETAILED DESCRIPTION

[0016] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only for enabling those skilled in the art to better understand and thereby implement the present invention, rather than implying any limitation on the scope of the present invention.

[0017] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on,” and the terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0018] Figure 1 is a diagram of a weather radar velocity spectrum width test system according to an exemplary embodiment. Figure 1 As shown, in order to achieve the above-mentioned purpose, the present invention provides a weather radar velocity spectrum width testing system, comprising: Weather radars, detection devices and ground control consoles; The detection device includes a first detection device and a second detection device, the first detection device includes a first motion mechanism, a first fixing mechanism, a first measuring mechanism and a release mechanism, and the second detection device includes a second motion mechanism, a second fixing mechanism and a second measuring mechanism; The ground control console is provided with a wireless control module, a data receiving module and a data comparison module; Control the first detection device and the second detection device to reach above the weather radar through the wireless control module; The data receiving module is used to receive data from the first measuring mechanism and the second measuring mechanism; The data comparison module is used to compare the data of the first measurement mechanism and the second measurement mechanism with the data obtained by the weather radar; Completed the first test based on weather radar, first detection device and ground control console; The second test was completed based on the weather radar, the first detection device, the second detection device and the ground control console.

[0019] According to one embodiment of the present invention, the first motion mechanism is a first rotorcraft, the first fixing mechanism and the second fixing mechanism are non-metallic ropes, the first measuring mechanism is a first metal ball, the release mechanism is arranged on one side of the first rotorcraft, and the first metal ball is connected to the release mechanism through a non-metallic rope.

[0020] According to one embodiment of the present invention, the second motion mechanism is a second rotorcraft, the second measuring mechanism is a second metal ball, and the second metal ball is connected to the second rotorcraft via a non-metallic rope.

[0021] According to one embodiment of the present invention, the first metal ball and the second metal ball are provided with GPS positioning modules, and the mass of the first metal ball is consistent with the mass of the second metal ball.

[0022] According to one embodiment of the present invention, in a first test, a first detection device is arranged in a phased array radar beam of a weather radar; In the second test, the first detection device and the second detection device were arranged in the phased array radar beam of the weather radar, and the first detection device was obliquely above the second detection device.

[0023] Furthermore, in order to achieve the above-mentioned purpose, the present invention also provides a weather radar velocity spectrum width testing system. Figure 2 is a flow chart of a method for testing a weather radar velocity spectrum width according to an exemplary embodiment. Figure 2 As shown, a weather radar velocity spectrum width testing method in the present invention includes: The weather radar is set with the antenna surface horizontal, and the first detection device is controlled to be above the weather radar through the ground control console; releasing the first metal ball through a releasing mechanism, and obtaining a first moving speed of the first metal ball and a second moving speed of the first rotorcraft; Based on the weather radar detection, the signal of the first metal ball is received, IQ data is recorded, and spectrum analysis is performed using the IQ data to obtain a first velocity spectrum width; A first movement speed difference is obtained based on the first movement speed and the second movement speed, and if the first movement speed difference is equal to the first speed spectrum width, the first test is completed; After the first test is completed, the second detection device is controlled to the top of the weather radar through the ground control console; Control the first rotorcraft to drive the first metal ball to rise and the second rotorcraft to drive the second metal ball to descend, and obtain a third movement speed of the first metal ball and a fourth movement speed of the second metal ball; Based on the weather radar detection, signals of the first metal ball and the second metal ball are received, IQ data is recorded, and spectrum analysis is performed using the IQ data to obtain a second velocity spectrum width; A second motion speed difference is obtained based on the third motion speed and the fourth motion speed. If the second motion speed difference and the second speed spectrum width are equal, a second test is completed; if they are not equal, a retest is performed; When both the first and second tests are completed, the weather radar velocity spectrum width test is completed.

[0024] According to one embodiment of the present invention, Figure 3 is a schematic diagram showing that the non-metallic rope is not fully unfolded in the first test according to an exemplary embodiment. Figure 3 As shown, during the first test, the first rotorcraft carries the first metal ball, the non-metal rope between the first metal ball and the first rotorcraft when the ball is not released is 1 meter long, the first rotorcraft is 300 meters above the ground, and the total length of the two non-metal ropes is 25 meters; Adjusting the positions of the first metal ball and the first rotorcraft so that they are simultaneously in the phased array radar beam of the weather radar, and the first rotorcraft and the first metal ball are visible on the display of the weather radar and are in the same radar radial distance library; Figure 4 is a schematic diagram showing a first test of a non-metallic rope being fully unfolded according to an exemplary embodiment. Figure 4 As shown, the first metal ball is released by a release mechanism provided on the first rotorcraft, and the first metal ball falls down until the first metal ball and the non-metallic rope of the first rotorcraft are fully unfolded.

[0025] According to one embodiment of the present invention, when performing a first test, the first rotorcraft and the first metal ball are regarded as two targets in a weather radar; When the first metal ball is released, a first movement speed of the first metal ball is obtained through a GPS positioning module on the first metal ball, wherein the first movement speed is not equal to the second movement speed, the first movement speed increases continuously, the second movement speed is 0, and the first movement speed is greater than the speed resolution of the weather radar; The first movement speed difference is obtained based on the first movement speed and the second movement speed, wherein the formula is, ; in, is the first motion speed difference; is the first movement speed; is the second movement speed; It is determined whether the first motion speed difference is equal to the first speed spectrum width. If the first motion speed difference is equal to the first speed spectrum width, the first test is completed. If not, a retest is performed.

[0026] Figure 5 is a schematic diagram of a second test according to an exemplary embodiment. Figure 5 As shown, according to one embodiment of the present invention, after the first test is completed, the position of the first rotorcraft is kept unchanged, and the second rotorcraft is controlled by the ground control console, and the camera on the second rotorcraft is directed toward the first rotorcraft; The second rotorcraft approaches the first rotorcraft so that the first rotorcraft and the second rotorcraft are simultaneously in the phased array radar beam of the weather radar; The first rotorcraft and the second rotorcraft are 2 meters apart horizontally, the first rotorcraft is 300 meters above the ground, and the second rotorcraft is 295 meters above the ground.

[0027] According to one embodiment of the present invention, when performing the second test, the first metal ball and the second metal ball are regarded as two targets in the weather radar; The first rotorcraft is controlled by the ground control console to drive the first metal ball to rise through the non-metallic rope, and the third movement speed of the first metal ball is obtained through the GPS positioning module on the first metal ball; The second rotorcraft is controlled by the ground control console to drive the second metal ball to rise through the non-metallic rope, and the fourth movement speed of the second metal ball is obtained through the GPS positioning module on the second metal ball; The third motion speed is not equal to the fourth motion speed, and the third motion speed and the fourth motion speed are greater than the speed resolution of the weather radar; The second movement speed difference is obtained based on the third movement speed and the fourth movement speed, wherein the formula is, ; in, is the second motion speed difference; is the third movement speed; is the fourth movement speed; Determine whether the second motion speed difference is equal to the second speed spectrum width. If the second motion speed difference is equal to the second speed spectrum width, complete the second test. If not, perform a retest.

[0028] According to one embodiment of the present invention, the GPS positioning module configured on the first metal ball and the second metal ball gives the vertical movement speed of the metal ball, and the speed difference between the two metal balls is the "true value" of the comparison test of the speed spectrum width of the metal ball target detected by the weather radar. The data of the GPS positioning module configured on the metal ball can be exported after the rotorcraft lands, and the speed of the metal ball measured by the GPS positioning module is matched with the radar speed spectrum width through time.

[0029] Those of ordinary skill in the art will appreciate that the modules and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0030] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and equipment can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0031] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0032] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of the present invention.

[0033] In addition, each functional module in the embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0034] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the energy-saving signal sending / receiving method of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0035] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0036] It should be understood that the size of the serial numbers of each step in the content of the invention and the embodiments of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. A weather radar velocity spectrum width test system, characterized in that: include: Weather radars, detection devices and ground control consoles; The detection device comprises a first detection device and a second detection device, the first detection device comprises a first moving mechanism, a first fixing mechanism, a first measuring mechanism and a releasing mechanism, and the second detection device comprises a second moving mechanism, a second fixing mechanism and a second measuring mechanism; The ground control console is provided with a wireless control module, a data receiving module and a data comparison module; Control the first detection device and the second detection device to reach above the weather radar through the wireless control module; The data receiving module is used to receive data from the first measuring mechanism and the second measuring mechanism; The data comparison module is used to compare the data of the first measurement mechanism and the second measurement mechanism with the data obtained by the weather radar; Complete a first test based on the weather radar, the first detection device and the ground control console; A second test is completed based on the weather radar, the first detection device, the second detection device and the ground control console.

2. A weather radar velocity spectrum width test system as claimed in claim 1, characterized in that: The first motion mechanism is a first rotorcraft, the first fixing mechanism and the second fixing mechanism are non-metallic ropes, the first measuring mechanism is a first metal ball, the release mechanism is arranged on one side of the first rotorcraft, and the first metal ball is connected to the release mechanism through a non-metallic rope.

3. A weather radar velocity spectrum width test system as claimed in claim 2, characterized in that: The second motion mechanism is a second rotorcraft, the second measuring mechanism is a second metal ball, and the second metal ball is connected to the second rotorcraft via a non-metallic rope.

4. A weather radar velocity spectrum width test system as claimed in claim 3, characterized in that: The first metal ball and the second metal ball are provided with GPS positioning modules, and the mass of the first metal ball is consistent with the mass of the second metal ball.

5. A weather radar velocity spectrum width test system as claimed in claim 4, characterized in that: In a first test, the first detection device is arranged in a phased array radar beam of the weather radar; In the second test, the first detection device and the second detection device are arranged in the phased array radar beam of the weather radar, and the first detection device is obliquely above the second detection device.

6. A weather radar velocity spectrum width test method, using a weather radar velocity spectrum width test system according to any one of claims 1 to 5, characterized in that: include: The weather radar is arranged with its antenna surface horizontally, and the first detection device is controlled to be above the weather radar through the ground control console; releasing the first metal ball by the release mechanism, and acquiring a first moving speed of the first metal ball and a second moving speed of the first rotorcraft; Based on the weather radar detecting and receiving the signal of the first metal ball, recording IQ data, and performing spectrum analysis on the IQ data to obtain a first velocity spectrum width; obtaining a first movement speed difference based on the first movement speed and the second movement speed, and completing a first test if the first movement speed difference is equal to the first speed spectrum width; When the first test is completed, controlling the second detection device to above the weather radar through the ground control console; Controlling the first rotorcraft to drive the first metal ball to rise and the second rotorcraft to drive the second metal ball to descend, and obtaining a third movement speed of the first metal ball and a fourth movement speed of the second metal ball; Based on the weather radar detecting and receiving the signals of the first metal ball and the second metal ball, recording IQ data, and performing spectrum analysis on the IQ data to obtain a second velocity spectrum width; Obtaining a second movement speed difference based on the third movement speed and the fourth movement speed, and if the second movement speed difference is equal to the second speed spectrum width, completing a second test, and if they are not equal, performing a retest; When both the first and second tests are completed, the weather radar velocity spectrum width test is completed.

7. A weather radar velocity spectrum width testing method as claimed in claim 6, characterized in that: During the first test, the first rotorcraft carries the first metal ball, the non-metal rope between the first metal ball and the first rotorcraft is 1 meter long when the first metal ball is not released, and the first rotorcraft is 300 meters above the ground. Adjusting the positions of the first metal ball and the first rotorcraft so that they are simultaneously in the phased array radar beam of the weather radar, and the first rotorcraft and the first metal ball are visible on the display of the weather radar and are in the same radar radial distance library; The first metal ball is released by the release mechanism provided on the first rotorcraft, and the first metal ball falls until the first metal ball and the non-metallic rope of the first rotorcraft are fully unfolded.

8. A weather radar velocity spectrum width testing method as claimed in claim 7, characterized in that: When performing a first test, the first rotorcraft and the first metal ball are regarded as two targets in the weather radar; When the first metal ball is released, the first movement speed of the first metal ball is acquired through a GPS positioning module on the first metal ball, wherein the first movement speed is not equal to the second movement speed, the first movement speed increases continuously, the second movement speed is 0, and the first movement speed is greater than a speed resolution of the weather radar; The first movement speed difference is obtained based on the first movement speed and the second movement speed, wherein the formula is, ； in, is the first motion speed difference; is the first movement speed; is the second movement speed; It is determined whether the first motion speed difference is equal to the first speed spectrum width. If the first motion speed difference is equal to the first speed spectrum width, the first test is completed; if not, a retest is performed.

9. A weather radar velocity spectrum width testing method as claimed in claim 8, characterized in that: After the first test is finished, the position of the first rotorcraft is kept unchanged, and the second rotorcraft is controlled by the ground control console, with the camera on the second rotorcraft facing the first rotorcraft; The second rotorcraft approaches the first rotorcraft so that the first rotorcraft and the second rotorcraft are simultaneously in the phased array radar beam of the weather radar; The first rotorcraft and the second rotorcraft are 2 meters apart horizontally, the first rotorcraft is 300 meters above the ground, and the second rotorcraft is 295 meters above the ground.

10. A weather radar velocity spectrum width testing method as claimed in claim 9, characterized in that: When performing a second test, the first metal ball and the second metal ball are regarded as two targets in the weather radar; Controlling the first rotorcraft to drive the first metal ball to rise through the non-metallic rope through the ground control console, and obtaining the third movement speed of the first metal ball through the GPS positioning module on the first metal ball; Controlling the second rotorcraft to drive the second metal ball to rise through the non-metallic rope through the ground control console, and obtaining the fourth movement speed of the second metal ball through the GPS positioning module on the second metal ball; wherein the third movement speed is not equal to the fourth movement speed, and the third movement speed and the fourth movement speed are greater than the speed resolution of the weather radar; The second movement speed difference is obtained based on the third movement speed and the fourth movement speed, wherein the formula is, ； in, is the second motion speed difference; is the third movement speed; is the fourth movement speed; Determine whether the second motion speed difference is equal to the second speed spectrum width. If the second motion speed difference is equal to the second speed spectrum width, complete the second test. If not, perform a retest.

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