A meteorological radar scanning control method, device, storage medium and electronic equipment

Abstract

The present application proposes a meteorological radar scanning control method, device, storage medium and electronic device, including: controlling the meteorological radar to scan in a first scanning mode to obtain the target distance information of the target cloud body relative to the meteorological radar, the first scanning mode is parallel scanning in which the meteorological radar keeps a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range; when the target distance information is less than the preset first distance threshold, the meteorological radar is controlled to scan in a second scanning mode to obtain the structural data of the target cloud body; the second scanning mode represents adjusting the azimuth angle of the meteorological radar according to the first type of periodic interval, and in each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged and the elevation angle changes uniformly within the second preset range to perform vertical profile scanning on the target cloud body. The scanning efficiency can be improved, the scanning time of the rapidly changing weather system can be greatly reduced, and the entire convective cloud body can be covered.

Description

Technical Field

[0001] The present application relates to the field of weather, and more specifically, to a meteorological radar scanning control method, device, storage medium and electronic device. Background Art

[0002] Although various weather radars have made great progress in weather detection in the past 30 years, the development of radar technology has put forward higher requirements for the detection of severe convective weather. At present, most radars take 6 minutes to complete a volume scan, and still cannot cover the entire cloud body. This time is relatively long for some rapidly developing severe convective weather (minute-level changes), and it is impossible to capture the rapidly changing microphysical processes in the cloud.

[0003] Therefore, how to accurately capture the 3D structure of the convective bubble and the structure of the downburst in the convective cloud to ensure coverage of the entire convective cloud body has become a difficult problem that technicians in this field are concerned about. Summary of the invention

[0004] The purpose of the present application is to provide a weather radar scanning control method, device, storage medium and electronic device to at least partially improve the above-mentioned problems.

[0005] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides a meteorological radar scanning control method, the method comprising:

[0007] Controlling the meteorological radar to scan in a first scanning mode to obtain target distance information of the target cloud body relative to the meteorological radar, wherein the first scanning mode is parallel scanning in which the meteorological radar maintains a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range;

[0008] When the target distance information is less than a preset first distance threshold, controlling the weather radar to scan in a second scanning mode to obtain structural data of the target cloud body;

[0009] Among them, the second scanning mode is characterized by adjusting the azimuth angle of the meteorological radar according to the first type of periodic intervals. In each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within a second preset range to perform a vertical profile scan of the target cloud body.

[0010] In a second aspect, an embodiment of the present application provides a weather forecasting method, the method comprising:

[0011] Acquiring structural data of the target cloud body obtained by the above-mentioned meteorological radar scanning control method;

[0012] A weather forecast result is obtained based on the structural data of the target cloud body.

[0013] In a third aspect, an embodiment of the present application provides a meteorological radar scanning control device, the device comprising:

[0014] A processing unit, configured to control the meteorological radar to scan in a first scanning mode to obtain target distance information of a target cloud body relative to the meteorological radar, wherein the first scanning mode is parallel scanning in which the meteorological radar maintains a predetermined elevation angle unchanged and an azimuth angle changes uniformly within a first preset range;

[0015] a scanning unit, configured to control the meteorological radar to scan in a second scanning mode to obtain structural data of the target cloud body when the target distance information is less than a preset first distance threshold;

[0016] Among them, the second scanning mode is characterized by adjusting the azimuth angle of the meteorological radar according to the first type of periodic intervals. In each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within a second preset range to perform a vertical profile scan of the target cloud body.

[0017] In a fourth aspect, an embodiment of the present application provides a weather forecasting device, the device comprising:

[0018] An information acquisition unit, used to acquire the structural data of the target cloud body obtained by the above-mentioned meteorological radar scanning control method;

[0019] The prediction unit is used to obtain a weather prediction result based on the structural data of the target cloud body.

[0020] In a fifth aspect, an embodiment of the present application provides a storage medium on which a computer program is stored, and the computer program implements the above method when executed by a processor.

[0021] In a sixth aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory, wherein the memory is used to store one or more programs; when the one or more programs are executed by the processor, the above method is implemented.

[0022] Compared with the prior art, the meteorological radar scanning control method, device, storage medium and electronic device provided in the embodiment of the present application include: controlling the meteorological radar to scan in a first scanning mode to obtain the target distance information of the target cloud body relative to the meteorological radar, the first scanning mode is parallel scanning in which the meteorological radar keeps a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range; when the target distance information is less than the preset first distance threshold, the meteorological radar is controlled to scan in a second scanning mode to obtain the structural data of the target cloud body; the second scanning mode represents adjusting the azimuth angle of the meteorological radar according to the first type of periodic interval, and in each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged and the elevation angle changes uniformly within the second preset range to perform a vertical profile scan of the target cloud body. The scanning efficiency can be improved, the scanning time of the rapidly changing weather system can be greatly reduced, and the entire convective cloud body can be covered.

[0023] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of a scanning result provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a flow chart of a meteorological radar scanning control method provided in an embodiment of the present application;

[0028] Figure 4 One of the flow charts of the meteorological radar scanning control method provided in the embodiment of the present application;

[0029] Figure 5 The second flowchart of the weather radar scanning control method provided in the embodiment of the present application;

[0030] Figure 6 The third flowchart of the meteorological radar scanning control method provided in the embodiment of the present application;

[0031] Figure 7A schematic diagram of a weather forecasting method according to an embodiment of the present invention;

[0032] Figure 8 A schematic diagram of a unit of a weather radar scanning control device provided in an embodiment of the present application;

[0033] Fig. 9 A schematic diagram of a unit of a weather forecasting device provided in an embodiment of the present application.

[0034] In the figure: 10 - processor; 11 - memory; 12 - bus; 13 - communication interface; 301 - processing unit; 302 - scanning unit; 401 - information acquisition unit; 402 - prediction unit. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] Although various weather radars have made great progress in weather detection in the past 30 years, with the development of radar technology, higher requirements have been put forward in the detection of severe convective weather. At present, most radars take 6 minutes to complete a volume scan. In addition, since the current elevation angle is fixed, the weather radar is controlled to do PPI scanning. PPI scanning refers to the plane position display product, which refers to the data obtained by the radar scanning a circle at a certain elevation angle. Please refer to Figure 1 , Figure 1 A schematic diagram of a scanning result provided in an embodiment of the present application. Figure 1As shown, the scanning results obtained by the current scanning method cannot cover the entire cloud body, and the scanning time is too long for some rapidly developing severe convective weather (minute-level changes), and it is impossible to capture the rapidly changing microphysical processes in the cloud.

[0043] Phased array weather radar (PAR) can quickly and accurately switch beam pointing capabilities, enabling it to scan the entire airspace within 1-2 minutes and simultaneously acquire a large amount of meteorological information. In order to accurately capture the 3D structure of convective bubbles and downbursts within a convective cloud within a time scale of 1-3 minutes, phased array polarization weather radar can be used for meteorological monitoring, but the construction cost of phased array radars is tens of millions, making this type of weather radar difficult to popularize.

[0044] Therefore, it is necessary to improve the scanning mode of ordinary weather radar. The embodiment of the present application proposes a weather radar scanning control method as a new scanning method to further improve the radar scanning speed of severe convective weather systems, so as to significantly reduce the scanning time of rapidly changing weather systems and cover the entire convective cloud body. The weather radar scanning control method provided in the embodiment of the present application can be applied to the electronic device described below.

[0045] The present application provides an electronic device, which may be a control system in a weather radar, or a host computer connected to a weather radar, such as a computer, server, mobile phone, or other terminal device with computing signal processing capabilities. Figure 2 , a schematic diagram of the structure of an electronic device. The electronic device includes a processor 10, a memory 11, and a bus 12. The processor 10 and the memory 11 are connected via the bus 12, and the processor 10 is used to execute an executable module stored in the memory 11, such as a computer program.

[0046] The processor 10 can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the weather radar scanning control method can be completed by the hardware integrated logic circuit in the processor 10 or the instructions in the form of software. The above-mentioned processor 10 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0047] The memory 11 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory.

[0048] The bus 12 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus. Figure 2 Although only one bidirectional arrow is used in the figure, it does not mean that there is only one bus 12 or only one type of bus 12 .

[0049] The memory 11 is used to store programs, such as programs corresponding to the weather radar scanning control device. The weather radar scanning control device includes at least one software function module that can be stored in the memory 11 in the form of software or firmware or fixed in the operating system (OS) of the electronic device. After receiving the execution instruction, the processor 10 executes the program to implement the weather radar scanning control method.

[0050] Possibly, the electronic device provided in the embodiment of the present application further includes a communication interface 13. The communication interface 13 is connected to the processor 10 via a bus.

[0051] When the electronic device is a control system in a weather radar, the electronic device can be connected to the attitude adjustment device in the weather radar through the communication interface 13 to control the attitude adjustment device to adjust the elevation and azimuth of the weather radar according to the information instruction conditions. It should be understood that the electronic device can also be connected to the host computer of the weather radar through the communication interface 13 to transmit the acquired cloud structure data to the host computer.

[0052] It should be understood that Figure 2 The structure shown is only a schematic diagram of a portion of the electronic device. The electronic device may also include Figure 2 More or fewer components as shown, or with Figure 2 Different configurations shown. Figure 2 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0053] The weather radar scanning control method provided in the embodiment of the present application can be applied to but not limited to Figure 2 For detailed procedures, please refer to the electronic equipment shown in Figure 3 , the weather radar scanning control method includes: S101 and S105, which are specifically described as follows.

[0054] S101, controlling the meteorological radar to scan in a first scanning mode to obtain target distance information of a target cloud body relative to the meteorological radar.

[0055] The first scanning mode is parallel scanning in which the meteorological radar keeps a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range. The target distance information is the horizontal distance of the target cloud body relative to the meteorological radar.

[0056] Optionally, the first scanning mode may be a PPI scanning, and the first preset range may be 0-360°.

[0057] It should be noted that the predetermined elevation angle can be changed. In the present application, the weather radar maintains the predetermined elevation angle unchanged, which means that the weather radar maintains the predetermined elevation angle unchanged in one or more detection cycles. When entering the next detection stage, the predetermined elevation angle can also change to obtain more comprehensive target cloud information.

[0058] Optionally, the target cloud body in the present application may be a cloud body on which raindrops have formed, and the weather radar may monitor the target cloud body and further obtain target distance information of the target cloud body.

[0059] S105: When the target distance information is less than a preset first distance threshold, control the meteorological radar to scan in a second scanning mode to obtain structural data of the target cloud body.

[0060] Among them, the second scanning mode is characterized by adjusting the azimuth angle of the meteorological radar according to the first type of periodic intervals. In each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within a second preset range to perform a vertical profile scan of the target cloud body.

[0061] It should be understood that if the target distance information is less than the preset first distance threshold, it means that the target cloud body is above the weather radar, and the weather system (target cloud body) detected by the weather radar is an overhead system. At this time, it is necessary to control the weather radar to scan in the second scanning mode to obtain the structural data of the target cloud body. The first distance threshold can be but is not limited to 3KM.

[0062] Optionally, the second scanning mode may be an RHI scanning mode for performing range height display, which refers to data obtained by vertically scanning the radar along a certain azimuth angle.

[0063] If the antenna rotation speed is 10° / s when performing RHI scanning from 0-180°, the first type of period can be 18S, that is, the azimuth of the meteorological radar is adjusted every 18S, and the single adjustment range can be set according to user needs, for example, the single adjustment range is 10°. It should be understood that within 18S (first type of period) after the azimuth is adjusted, the meteorological radar keeps the azimuth unchanged. At this time, the meteorological radar is controlled to keep the azimuth unchanged, and the elevation angle changes at a uniform speed within the second preset range to perform a vertical profile scan of the target cloud body. The second preset range can be 0°-180°, and the change rate of the elevation angle can be 10° per second. It should be understood that in the second scanning mode, after the range of change of the azimuth angle is determined, for example, the effective range of change of the azimuth angle is 180°, it takes 5.4 minutes to complete a volume scan.

[0064] It should be understood that when the target distance information is less than the preset first distance threshold, controlling the meteorological radar to scan in the second scanning mode to obtain the structural data of the target cloud body can improve the scanning efficiency and obtain more comprehensive scanning information.

[0065] In summary, a meteorological radar scanning control method provided by an embodiment of the present application includes: controlling the meteorological radar to scan in a first scanning mode to obtain target distance information of the target cloud body relative to the meteorological radar, the first scanning mode is parallel scanning in which the meteorological radar maintains a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range; when the target distance information is less than the preset first distance threshold, controlling the meteorological radar to scan in a second scanning mode to obtain structural data of the target cloud body; the second scanning mode represents adjusting the azimuth angle of the meteorological radar according to the first type of periodic intervals, and in each first type of period, controlling the meteorological radar to maintain the azimuth angle unchanged and the elevation angle changes uniformly within the second preset range to perform vertical profile scanning of the target cloud body. The scanning efficiency can be improved, the scanning time of the rapidly changing weather system can be greatly reduced, and the entire convective cloud body can be covered.

[0066] exist Figure 3 Based on this, regarding how to control the weather radar to scan, the present application embodiment also provides a possible implementation method, please refer to Figure 4 The weather radar scanning control method includes: S104, S107 and S108, which are specifically described as follows.

[0067] S104, determining whether the target distance information is less than a preset first distance threshold. If yes, executing S105; if no, executing S107.

[0068] It should be understood that after the target distance information is obtained based on S101, S104 can be executed to determine whether the target cloud body is an over-the-top system. If the target distance information is less than the preset first distance threshold, the target cloud body is an over-the-top system. At this time, S105 is executed to complete the over-the-top system scan. Otherwise, S107 needs to be executed to obtain the structural data of the target cloud body in other ways.

[0069] S107: When the target distance information is greater than or equal to the first distance threshold, determine a third elevation angle variation range based on the current height of the target cloud body and the target distance information.

[0070] Among them, the third elevation angle variation range represents the elevation angle variation range of the meteorological radar when the monitoring signal of the meteorological radar completely covers the target cloud body.

[0071] Optionally, the third elevation angle variation range may be obtained based on the following formula:

[0072] α = arctan (h / m);

[0073] Among them, α represents the upper limit of the third elevation angle variation range, h represents the current height of the target cloud body, m represents the target distance information, and the third elevation angle variation range is (0°, α).

[0074] For example, when the current altitude is 14KM and the target distance information is 3KM, it can be calculated that the radar scanning elevation angle (α) is 77°, which can cover the entire cloud system, and the third elevation angle variation range is (0°, 77°).

[0075] S108, controlling the meteorological radar to scan in a third scanning mode to obtain structural data of the target cloud body.

[0076] Among them, the third scanning mode is characterized by adjusting the azimuth angle of the meteorological radar to change uniformly within a fourth preset range according to the second type of periodic intervals. In each second type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within the third elevation angle change range to perform a vertical profile scan of the target cloud body. The fourth preset range is the azimuth angle change range in which the monitoring signal intensity of the target cloud body obtained by the meteorological radar is greater than the preset intensity threshold.

[0077] Optionally, the second type of cycle can be set according to the duration of the elevation angle changing from the lower limit of the third elevation angle variation range to the upper limit. For example, the azimuth angle of the meteorological radar at the initial moment is the lower limit of the fourth preset range, and the elevation angle at the initial moment is the lower limit of the third elevation angle variation range (e.g., 0°). After a second type of cycle time interval, the elevation angle of the meteorological radar becomes the upper limit of the third elevation angle variation range (e.g., 77°). At this time, the meteorological radar is controlled to adjust the azimuth angle according to the corresponding preset amplitude (e.g., 1°). After the adjustment is completed, the next cycle is entered. At this time, the elevation angle of the meteorological radar is controlled to change from the upper limit of the third elevation angle variation range to the lower limit of the third elevation angle variation range, completing the second cycle of scanning, and so on, until the azimuth angle of the meteorological radar becomes the upper limit of the fourth preset range, completing all scans of the azimuth angle change within the fourth preset range.

[0078] Optionally, the lower limit of the fourth preset range can be the azimuth at which the first monitoring signal strength detected by the weather radar through PPI scanning is greater than a preset signal strength threshold, and the signal strength threshold is, for example, 20 dBz. The upper limit of the fourth preset range can be the azimuth at which the last monitoring signal strength detected by the weather radar through PPI scanning is greater than a preset signal strength threshold. Among them, the monitoring signal strength can also be understood as a radar reflectivity factor. The fourth preset range represents the azimuth range occupied by the target cloud body.

[0079] Continuing to refer to the above example, when the current altitude is 14KM, the target distance information is 3KM, and the fourth preset range is 30°, the weather radar scanning mode is set to start from the lower limit of the fourth preset range, and perform 0-77° RHI scanning at intervals of 1° in azimuth. If the radar antenna pitch scanning speed is 10° / s, considering that the time for the antenna azimuth to change to the next angle is 1 second, the radar antenna stores data once after scanning from the lowest layer to the highest elevation angle, and the next RHI scan stores data once after descending from the highest elevation angle to the lowest elevation angle, and so on. It takes 4.3 minutes to complete a volume scan.

[0080] It should be understood that through Figure 4 The meteorological radar scanning control method shown can completely cover the entire target cloud body and obtain more accurate structural data while reducing the scanning time.

[0081] exist Figure 3 Based on this, regarding how to control the weather radar to scan, the present application embodiment also provides a possible implementation method, please refer to Figure 5 The weather radar scanning control method includes: S104, S109, S110 and S111, which are specifically described as follows.

[0082] S104, determining whether the target distance information is less than a preset first distance threshold. If yes, executing S105; if no, executing S109.

[0083] and Figure 4 The same is true for S104 in the example, which will not be elaborated here.

[0084] S109: When the target distance information is greater than or equal to the first distance threshold, determine the distance range interval where the target cloud body is located according to the target distance information.

[0085] Optionally, the distance range interval is, for example, 3-10 kilometers, 10-30 kilometers, 30-75 kilometers, and above 75 kilometers. After the first distance threshold is determined, the distance range interval to which it belongs can be correspondingly determined.

[0086] S110: Determine a fifth elevation angle variation range based on the distance range interval and the current altitude of the target cloud body.

[0087] Among them, the fifth elevation angle variation range represents the elevation angle variation range of the meteorological radar when the monitoring signal of the meteorological radar completely covers the target cloud body.

[0088] Optionally, the fifth elevation angle variation range may be obtained based on the following formula:

[0089] β = arctan(h / L);

[0090] Among them, β represents the upper limit of the third elevation angle variation range, h represents the current height of the target cloud body, L represents the lower limit of the distance range, and the third elevation angle variation range is (0°, β).

[0091] For example, when the current altitude is 14KM and the target distance information is 8KM, it belongs to the 3-10KM interval. It can be calculated that the radar scanning elevation angle (β) is 77°, which can cover the entire cloud system, and the fifth elevation angle variation range is (0°, 77°).

[0092] If other conditions remain unchanged and the distance interval range changes, the fifth elevation angle change ranges corresponding to 10-30 km, 30-75 km and 75 km are (0°, 54°), (0°, 25°) and (0°, 10°) respectively.

[0093] S111, controlling the meteorological radar to scan in a fourth scanning mode to obtain structural data of the target cloud body.

[0094] Among them, the fourth scanning mode represents that the azimuth of the meteorological radar is adjusted to change uniformly within the fourth preset range according to the third-type periodic interval. In each third-type period, the meteorological radar is controlled to keep the azimuth unchanged, and the elevation changes uniformly within the fifth elevation angle change range to perform a vertical profile scan on the target cloud body. The fourth preset range is the azimuth change range in which the monitoring signal intensity of the target cloud body obtained by the meteorological radar is greater than the preset intensity threshold. The fourth preset range is the azimuth range occupied by the target cloud body relative to the meteorological radar on the horizontal plane.

[0095] Optionally, the third type of cycle can be set according to the duration of the elevation angle changing from the lower limit of the fifth elevation angle variation range to the upper limit. For example, the azimuth of the meteorological radar at the initial moment is the lower limit of the fourth preset range, and the elevation at the initial moment is the lower limit of the fifth elevation angle variation range (e.g., 0°). After a third type of cycle time interval, the elevation of the meteorological radar becomes the upper limit of the fifth elevation angle variation range (e.g., 77°). At this time, the meteorological radar is controlled to adjust the azimuth according to the corresponding preset amplitude (e.g., 1°). After the adjustment is completed, the next cycle is entered. At this time, the elevation of the meteorological radar is controlled to change from the upper limit of the fifth elevation angle variation range to the lower limit of the fifth elevation angle variation range, and the second cycle of scanning is completed. This is analogous to the case until the azimuth of the meteorological radar becomes the upper limit of the fourth preset range, and all scans in which the azimuth changes within the fourth preset range are completed.

[0096] It should be noted that Figure 5 The fourth preset range shown in Figure 4 The fourth preset range in is similar to that in the above, and will not be repeated here for the sake of simplicity.

[0097] Assume that, when the current altitude is 14 km, the target distance information is 6 km, and the fourth preset range is 30°, the distance between the target cloud and the weather radar is within the first distance range (3-10 km), and the weather radar scanning mode is set to start from the lower limit of the fourth preset range, and perform 0-77° RHI scanning at intervals of 1° in azimuth. If the radar antenna pitch scanning speed is 10° / s, considering that the time for the antenna azimuth to change to the next angle is 1 second, the radar antenna stores data once after scanning from the lowest layer to the highest elevation angle, and stores data once after the next RHI scan drops from the highest elevation angle to the lowest elevation angle, and so on. It takes 4.3 minutes to complete a volume scan.

[0098] When the target distance information is 15KM, the distance between the target cloud and the weather radar is within the second distance range (10-30 kilometers). The weather radar scanning mode is set to start from the lower limit of the fourth preset range, and perform 0-54° RHI scanning at intervals of 1° in azimuth. If the radar antenna pitch scanning speed is 10° / s, considering that the time for the antenna azimuth to change to the next angle is 1 second, the radar antenna stores data once after scanning from the lowest layer to the highest elevation angle, and stores data once after the next RHI scan drops from the highest elevation angle to the lowest elevation angle, and so on. It takes 3.2 minutes to complete a volume scan.

[0099] When the target distance information is 45KM, the distance between the target cloud and the weather radar is within the third distance range (30-75 kilometers). The weather radar scanning mode is set to start from the lower limit of the fourth preset range, and perform 0-25° RHI scanning at intervals of 1° in azimuth. If the radar antenna pitch scanning speed is 10° / s, considering that the time for the antenna azimuth to change to the next angle is 1 second, the radar antenna stores data once after scanning from the lowest layer to the highest elevation angle, and stores data once after the next RHI scan drops from the highest elevation angle to the lowest elevation angle, and so on. It takes 1.7 minutes to complete a volume scan.

[0100] When the target distance information is 76KM, the distance between the target cloud and the weather radar is within the fourth distance range (above 75 kilometers). The weather radar scanning mode is set to start from the lower limit of the fourth preset range, and perform 0-10° RHI scanning at intervals of 1° in azimuth. If the radar antenna pitch scanning speed is 10° / s, considering that the time for the antenna azimuth to change to the next angle is 1 second, the radar antenna stores data once after scanning from the lowest layer to the highest elevation angle, and stores data once after the next RHI scan drops from the highest elevation angle to the lowest elevation angle, and so on. It takes 1 minute to complete a volume scan.

[0101] exist Figure 4 and Figure 5On the basis of how to determine the fourth preset range to improve the scanning efficiency, the embodiment of the present application also provides a possible implementation method, please refer to Figure 6 After S101, the weather radar scanning control method further includes: S102 and S103, which are described in detail as follows.

[0102] S102, obtaining monitoring signal strengths at various azimuth angles when the meteorological radar performs scanning in a first scanning mode.

[0103] S103: Determine a fourth preset range based on the monitoring signal strengths obtained at each azimuth angle.

[0104] Optionally, by analyzing the changes in the monitoring signal strength obtained at each azimuth, the lower limit of the fourth preset range and the upper limit of the fourth preset range can be obtained, thereby determining the fourth preset range. As mentioned above, the lower limit of the fourth preset range can be the azimuth at which the first monitoring signal strength detected by the meteorological radar through PPI scanning is greater than a preset signal strength threshold, and the signal strength threshold is, for example, 20dBz. The upper limit of the fourth preset range can be the azimuth at which the last monitoring signal strength detected by the meteorological radar through PPI scanning is greater than a preset signal strength threshold. Among them, the monitoring signal strength can also be understood as a radar reflectivity factor. The fourth preset range represents the azimuth range occupied by the target cloud body.

[0105] exist Figure 4 and Figure 5 On the basis of how to determine the current height, thereby improving the scanning efficiency, the present application embodiment also provides a possible implementation method, please continue to refer to Figure 6 When the target distance information is greater than or equal to the first distance threshold, the weather radar scanning control method also includes: S106, which is specifically described as follows.

[0106] S106, controlling the weather radar to scan in the fifth scanning mode to obtain the current height of the target cloud body.

[0107] Among them, the fifth scanning mode represents that the meteorological radar maintains a predetermined azimuth angle unchanged, and the elevation angle changes uniformly within a second preset range to perform a vertical profile scan of the target cloud body.

[0108] It should be understood that the fifth scanning mode may be an RHI scan, and the current height of the target cloud body may be obtained based on the fifth scanning mode.

[0109] It should be noted that, in order to simplify the expression, Figure 6 Only shown in Figure 4 S107 and S108 are not shown. Figure 5 S109, S110 and S111 in.

[0110] The scanning control method of a weather radar provided by the present application is a new scanning strategy that can significantly reduce the detection time when detecting severe convective weather systems. Theoretically, it only takes about 1 minute to complete the scanning detection of the entire convective cloud, while the traditional detection method takes 6 minutes. The detection effect of a one-dimensional phased array weather radar can be achieved by simply changing the scanning method, which can reduce the cost at the equipment level.

[0111] The present application also provides a weather forecasting method. Figure 7 ,The weather prediction method includes: S201 and S202, which are specifically described as follows.

[0112] S201, obtaining structural data of a target cloud body obtained by a meteorological radar scanning control method.

[0113] S202: Acquire weather forecast results based on the structural data of the target cloud body.

[0114] Weather forecasting methods can be applied to Figure 2 The electronic device shown can also be applied to a prediction server, which is connected to a weather radar for communication to obtain structural data of a target cloud body monitored by the weather radar.

[0115] See also Figure 8 , Figure 8 A weather radar scanning control device is provided in an embodiment of the present application. Optionally, the weather radar scanning control device is applied to the electronic device described above.

[0116] The meteorological radar scanning control device includes: a processing unit 301 and a scanning unit 302 .

[0117] The processing unit 301 is used to control the meteorological radar to scan in a first scanning mode to obtain target distance information of the target cloud relative to the meteorological radar, wherein the first scanning mode is parallel scanning in which the meteorological radar maintains a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range.

[0118] The scanning unit 302 is used to control the meteorological radar to scan in a second scanning mode to obtain the structural data of the target cloud body when the target distance information is less than a preset first distance threshold.

[0119] Among them, the second scanning mode is characterized by adjusting the azimuth angle of the meteorological radar according to the first type of periodic intervals. In each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within a second preset range to perform a vertical profile scan of the target cloud body.

[0120] Optionally, the processing unit 301 may execute the above-mentioned S101 - S104 , S106 , S107 , S109 and S110 , and the scanning unit 302 may execute the above-mentioned S105 , S108 and S111 .

[0121] It should be noted that the weather radar scanning control device provided in this embodiment can execute the method flow shown in the above weather radar scanning control method flow embodiment to achieve the corresponding technical effect. For the sake of brief description, for parts not mentioned in this embodiment, please refer to the corresponding content in the above embodiment.

[0122] See also Fig. 9 , Fig. 9 A weather prediction device is provided in an embodiment of the present application. Optionally, the weather prediction device is applied to the electronic device or prediction server described above.

[0123] The weather prediction device includes: an information acquisition unit 401 and a prediction unit 402 .

[0124] The information acquisition unit 401 is used to acquire the structural data of the target cloud body obtained by the meteorological radar scanning control method.

[0125] The prediction unit 402 is used to obtain a weather prediction result based on the structural data of the target cloud body.

[0126] Optionally, the information acquisition unit 401 may execute the above S201, and the prediction unit 402 may execute the above S202.

[0127] It should be noted that the weather forecasting device provided in this embodiment can execute the method flow shown in the above weather forecasting method flow embodiment to achieve the corresponding technical effect. For the sake of brief description, for parts not mentioned in this embodiment, reference can be made to the corresponding contents in the above embodiments.

[0128] The present application also provides a storage medium, which stores computer instructions and programs, which, when read and executed, execute the weather radar scanning control method and / or weather prediction method of the above embodiment. The storage medium may include memory, flash memory, registers, or a combination thereof.

[0129] The following provides an electronic device, which can be a control system in a weather radar, or a host computer connected to a weather radar, such as a computer, a server, a mobile phone, or other terminal device with computing signal processing capabilities. Figure 2As shown, the above-mentioned weather radar scanning control method and / or weather prediction method can be implemented; specifically, the electronic device includes: a processor 10, a memory 11, and a bus 12. The processor 10 can be a CPU. The memory 11 is used to store one or more programs. When the one or more programs are executed by the processor 10, the weather radar scanning control method and / or weather prediction method of the above-mentioned embodiment is executed.

[0130] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0131] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0132] 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 application 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, including several instructions to enable 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 methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0133] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0134] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A meteorological radar scanning control method, characterized in that: The method comprises: Controlling the meteorological radar to scan in a first scanning mode to obtain target distance information of a target cloud body relative to the meteorological radar, wherein the first scanning mode is parallel scanning in which the meteorological radar maintains a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range, and the target cloud body is a cloud body on which raindrops have formed; When the target distance information is less than a preset first distance threshold, controlling the weather radar to scan in a second scanning mode to obtain structural data of the target cloud body; The second scanning mode is characterized by adjusting the azimuth angle of the meteorological radar according to the first type of periodic intervals. In each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes at a uniform speed within a second preset range, so as to perform vertical profile scanning on the target cloud body. When the target distance information is greater than or equal to the first distance threshold, determining a third elevation angle variation range based on the current height of the target cloud body and the target distance information, wherein the third elevation angle variation range represents the elevation angle variation range of the meteorological radar when the monitoring signal of the meteorological radar completely covers the target cloud body; Controlling the weather radar to scan in a third scanning mode to obtain structural data of the target cloud body; Among them, the third scanning mode is characterized by adjusting the azimuth angle of the meteorological radar to change uniformly within a fourth preset range according to the second type of periodic intervals. In each second type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within the third elevation angle change range to perform a vertical profile scan of the target cloud body. The fourth preset range is the azimuth angle change range in which the monitoring signal intensity of the target cloud body obtained by the meteorological radar is greater than a preset intensity threshold.

2. The weather radar scanning control method according to claim 1, characterized in that: The method further comprises: When the target distance information is greater than or equal to the first distance threshold, determining the distance range interval where the target cloud body is located according to the target distance information; Determine a fifth elevation angle variation range based on the distance range interval and the current height of the target cloud body, wherein the fifth elevation angle variation range represents the elevation angle variation range of the meteorological radar when the monitoring signal of the meteorological radar completely covers the target cloud body; controlling the weather radar to scan in a fourth scanning mode to obtain structural data of the target cloud body; Among them, the fourth scanning mode is characterized by adjusting the azimuth angle of the meteorological radar to change uniformly within a fourth preset range according to the third type of periodic intervals. In each third type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within the fifth elevation angle change range to perform a vertical profile scan on the target cloud body. The fourth preset range is the azimuth angle change range in which the monitoring signal intensity of the target cloud body obtained by the meteorological radar is greater than a preset intensity threshold.

3. The weather radar scanning control method according to claim 1 or 2, characterized in that: After controlling the weather radar to scan in the first scanning mode, the method further includes: Acquire the monitoring signal strength obtained at each azimuth when the weather radar is scanning in the first scanning mode; The fourth preset range is determined based on the monitoring signal strength obtained at each azimuth angle.

4. The weather radar scanning control method according to claim 1 or 2, characterized in that: When the target distance information is greater than or equal to the first distance threshold, the method further includes: Controlling the weather radar to scan in a fifth scanning mode to obtain the current height of the target cloud body; The fifth scanning mode indicates that the meteorological radar maintains a predetermined azimuth angle unchanged, and the elevation angle changes at a uniform speed within a second preset range, so as to perform a vertical profile scan on the target cloud body.

5. A weather forecasting method, characterized in that: The method comprises: Acquire the structural data of the target cloud body obtained by the meteorological radar scanning control method according to any one of claims 1 to 4; A weather forecast result is obtained based on the structural data of the target cloud body.

6. A weather radar scanning control device, characterized in that: The device comprises: a processing unit, configured to control the meteorological radar to scan in a first scanning mode to obtain target distance information of a target cloud body relative to the meteorological radar, wherein the first scanning mode is parallel scanning in which the meteorological radar maintains a predetermined elevation angle unchanged and the azimuth angle changes uniformly within a first preset range, and the target cloud body is a cloud body on which raindrops have been formed; a scanning unit, configured to control the meteorological radar to scan in a second scanning mode to obtain structural data of the target cloud body when the target distance information is less than a preset first distance threshold; The second scanning mode is characterized by adjusting the azimuth angle of the meteorological radar according to the first type of periodic intervals. In each first type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes at a uniform speed within a second preset range, so as to perform vertical profile scanning on the target cloud body. The processing unit is further configured to determine, when the target distance information is greater than or equal to the first distance threshold, a third elevation angle variation range based on the current height of the target cloud body and the target distance information, wherein the third elevation angle variation range represents the elevation angle variation range of the meteorological radar when the monitoring signal of the meteorological radar completely covers the target cloud body; The scanning unit is also used to control the weather radar to scan in a third scanning mode to obtain the structural data of the target cloud body; Among them, the third scanning mode is characterized by adjusting the azimuth angle of the meteorological radar to change uniformly within a fourth preset range according to the second type of periodic intervals. In each second type of period, the meteorological radar is controlled to keep the azimuth angle unchanged, and the elevation angle changes uniformly within the third elevation angle change range to perform a vertical profile scan of the target cloud body. The fourth preset range is the azimuth angle change range in which the monitoring signal intensity of the target cloud body obtained by the meteorological radar is greater than a preset intensity threshold.

7. A weather forecasting device, characterized in that: The device comprises: An information acquisition unit, used to acquire structural data of a target cloud body obtained by the meteorological radar scanning control method according to any one of claims 1 to 4; The prediction unit is used to obtain a weather prediction result based on the structural data of the target cloud body.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 4 or claim 5 is implemented.

9. An electronic device, characterized in that: include: A processor and a memory, the memory being used to store one or more programs; When the one or more programs are executed by the processor, the method according to any one of claims 1 to 4 or claim 5 is implemented.

Images