CN114019515B - Weather radar and azimuth tracking detection method and system thereof, equipment and storage medium - Google Patents
Weather radar and azimuth tracking detection method and system thereof, equipment and storage medium Download PDFInfo
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- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/66—Radar-tracking systems; Analogous systems
- G01S13/72—Radar-tracking systems; Analogous systems for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar
- G01S13/723—Radar-tracking systems; Analogous systems for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar by using numerical data
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Abstract
The invention discloses a weather radar and a method and a system for tracking and detecting the orientation of the weather radar, wherein the method comprises the steps of acquiring body scanning data of the weather radar, and judging whether specific weather exists or not according to the scanning data; when specific weather exists, diffusion identification is carried out towards the azimuth angles rotating clockwise and anticlockwise by taking the point with the maximum reflectivity intensity in the specific weather area as the center, and when the diffusion identification is continuously carried outnWhen the echo azimuth is invalid, determining the starting azimuth and the ending azimuth of the specific weather area, wherein 5 is less than or equal tonLess than or equal to one fourth of the number of the body sweeping azimuth angles; and sending the starting azimuth angle and the ending azimuth angle to a weather radar, determining a fan-shaped scanning angle range by the weather radar according to the starting azimuth angle and the ending azimuth angle, and performing fan-shaped scanning in the specific weather area according to the fan-shaped scanning angle range. The invention can identify the local small-scale weather process and carry out sector scanning in the local small-scale weather area, thereby improving the detection time resolution and accuracy.
Description
Technical Field
The invention belongs to the technical field of radar detection, and particularly relates to a weather radar, a method and a system for detecting orientation tracking of the weather radar, equipment and a storage medium.
Background
The detection mode of the weather radar is very single in business application. Liu Yingjun et al in "new generation weather radar body sweep mode discussion" Nanjing information engineering university, 2006 states that "when a new generation weather radar is used for detecting some special disastrous weather such as typhoon, sometimes the product will be less satisfactory to users, which brings difficulty to typhoon forecast, and this phenomenon occurs mainly because its body sweep mode is unsatisfactory, … …, and then a body sweep mode suitable for local special weather is tried to be proposed by combining local weather characteristics and actual working experience, so as to better detect and forecast the disastrous weather. And the change process of the weather with small and medium scales is faster, and the requirement for the detection mode is higher.
Weather radar mainly detects volume scanning (namely, volume scanning mode), sector scanning (namely, fan scanning mode), staring scanning (namely, condensing scanning mode) and the like from the rotating characteristic of a servo, and the main differences of the scanning modes are that azimuth scanning is different. Volume scanning, wherein the servo continuously scans in 360 degrees in azimuth; sector scanning, wherein the servo performs reciprocating scanning in a designated azimuth area; stare scanning, servo fixing and fixed point scanning on a certain azimuth, and any scanning mode needs to be set manually.
In business application, a scanning mode is always maintained after mode setting and before manual intervention, and a fixed scanning mode has the problems of long scanning time, low detection utilization rate, even missing of a weather process and the like. If the artificial weather identification switching mode is adopted, the problems of long weather identification process time, high requirement, complex switching process, high requirement on professional quality of personnel and the like exist. If the local weather can be automatically identified and tracked in the middle and small-scale weather observation process, the scanning of a specific azimuth area at a specific moment is realized, and the time resolution obtained in the middle and small-scale weather process can be greatly improved. For example, the X-band dual-polarization phased array weather radar needs thirty seconds for completing a 360-degree volume scanning, and only needs ten seconds for performing 60-degree sector scanning; if the local weather is concentrated in the 60 ° region, the scanning time resolution will be increased by at least one time after the tracking mode is implemented.
At present, no relevant research on a weather radar for realizing a tracking detection mode exists, the main reason is that the tracking detection mode is generally not suitable for a large-range weather process and is suitable for a local medium-small scale weather process, and early warning and forecast of medium-small scale weather is still a problem in the industry at present, and various researches are still in an exploration stage.
The name explains that the specific weather refers to local small and medium-scale weather within a radar scanning range, such as part of small-range hail, short-time strong precipitation, tornado and other weather processes.
Disclosure of Invention
The invention aims to provide a weather radar, a method, a system, equipment and a storage medium for tracking and detecting the orientation of the weather radar, and aims to solve the problems that the existing weather radar cannot realize tracking and detecting in the local middle and small-scale weather process, so that the detection utilization rate is not high, the detection time resolution is low, the weather process is easy to miss, and the detection accuracy is not high.
The invention solves the technical problems through the following technical scheme: a weather radar azimuth tracking detection method comprises the following steps:
step 1: acquiring weather radar volume scan data;
step 2: judging whether specific weather exists or not according to scanning data, wherein the scanning data is volume scanning data or sector scanning data; the specific weather refers to local medium and small-scale weather in a radar scanning range;
and step 3: when the scanning data is volume scanning data and no specific weather exists, turning to step 1; when the scanning data is sector scanning data and no specific weather exists, the weather radar is switched to a body scanning mode, and the step 1 is carried out; when specific weather exists, turning to step 4;
and 4, step 4: taking the maximum point of the reflectivity intensity in a specific weather region as the center, carrying out diffusion identification towards the azimuth angles rotating clockwise and anticlockwise, and continuously identifyingnWhen the echo azimuth is invalid, determining a starting azimuth and an ending azimuth of the specific weather area; wherein, 5 is less than or equal ton Less than or equal to one fourth of the number of the body sweeping azimuth angles;
and 5: sending the starting azimuth angle and the ending azimuth angle to a weather radar, determining a fan-shaped scanning angle range by the weather radar according to the starting azimuth angle and the ending azimuth angle, and performing fan-shaped scanning in the specific weather area according to the fan-shaped scanning angle range;
step 6: and (4) acquiring weather radar sector scanning data, and repeating the steps 2-5 to realize the continuous tracking detection of the weather radar azimuth.
Further, in step 1, the specific implementation process of identifying the specific weather according to the scan data is as follows:
calculating the effective data percentage of each azimuth according to the scanning data;
obtaining the number of continuous azimuth angles when the effective data percentage is larger than a first set threshold value according to the effective data percentage of each azimuth;
when the number of the continuous azimuth angles is larger than a second set threshold value and smaller than half of the number of the body-scanning azimuth angles, the corresponding azimuth is identified as a continuous independent azimuth;
in the consecutive independent orientations, if the maximum value of the reflectivity intensity is equal to or greater than a third set threshold value, a specific weather exists.
Further, the percentage of valid data is equal to the percentage of the number of valid distance bins to the total number of distance bins.
Further, the first set threshold is 10%, the second set threshold is 10, and the third set threshold is 35 dBZ.
Further, in the step 5, the range of the fan sweep angle is [ phi 1-theta, phi 2 + theta ], where phi 1 is a starting azimuth angle, phi 2 is an ending azimuth angle, and theta is the information of the acceleration and deceleration angle of the rotation of the weather radar servo motor.
Further, in the step 5, inmMaintaining a sector scan for a scan period in whichm≥3。
The invention also provides a weather radar azimuth tracking detection system which is in communication connection with a weather radar control system, and the azimuth tracking detection system comprises:
the data acquisition unit is used for acquiring weather radar scanning data, and the scanning data is normal scanning data or sector scanning data;
the judging unit is used for judging whether specific weather exists according to the scanning data; the specific weather refers to local small and medium-scale weather within a radar scanning range;
boundary determinationA unit for performing diffusion identification to the azimuth angle rotating clockwise and counterclockwise by taking the maximum point of the reflectivity intensity in the specific weather region as the center when the specific weather exists, and when continuously identifyingnWhen the azimuth of the invalid echo is determined, determining a starting azimuth and an ending azimuth of the specific weather area, and sending the starting azimuth and the ending azimuth to a weather radar so that the weather radar can determine a fan-scanning angle range according to the starting azimuth and the ending azimuth, and perform fan-scanning in the specific weather area according to the fan-scanning angle range; wherein, 5 is less than or equal ton Less than or equal to one fourth of the number of the body sweeping azimuth angles.
The invention also provides a weather radar, which comprises a control system and the weather radar azimuth tracking detection system; and the weather radar azimuth tracking detection system is in communication connection with the control system.
The invention also provides a weather radar azimuth tracking detection device, which comprises: a memory for storing a computer program; a processor for implementing the steps of the weather radar position tracking detection method as described above when executing the computer program.
The present invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the weather radar azimuth tracking detection method as described above.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
according to the weather radar and the azimuth tracking detection method and system thereof, provided by the invention, two dimensions of azimuth and reflectivity intensity are identified according to the characteristics of local small and medium-scale weather data, so that the accuracy of specific weather judgment is ensured; determining the boundary of the specific weather according to the echo characteristics of 'multi-layer decreasing' of the specific weather, namely determining a starting azimuth angle and an ending azimuth angle, and solving the problem that the weather boundary is difficult to determine; increasing acceleration and deceleration angle information of the servo motor on the basis of the weather boundary angle to form a sector scanning angle range, ensuring that the servo motor performs uniform scanning in a specific weather boundary, and ensuring the quality of weather data; the azimuth tracking detection method is repeatedly executed, the detection mode is ensured to adapt to the development process of the weather elimination, the time resolution of the small-scale weather detection in the local part is improved, and the early warning and forecasting capacity and accuracy of the specific weather are improved.
The invention establishes a set of mechanism capable of realizing weather radar azimuth tracking detection, so that the azimuth tracking detection mechanism has engineering realization capability in the application of weather radar; the rapid detection aiming at the specific weather process is helpful for understanding the formation mechanism of the weather process, and has higher scientific research value.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of a wide range of weather processes in an embodiment of the invention;
FIG. 2 is a schematic diagram of a local weather process in an embodiment of the invention;
FIG. 3 is a schematic diagram of a tracking boundary of a local weather process in an embodiment of the invention;
FIG. 4 is a flow chart of a weather radar azimuth tracking detection mode in an embodiment of the present invention;
FIG. 5 is a diagram of a "multi-level degressive" echo in a weather process in an embodiment of the present invention.
Detailed Description
The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In the service application of the weather radar, a scanning mode is often maintained, and a certain fixed scanning mode has the problems of long scanning time, low detection utilization rate, even missing of a weather process and the like, for example, the application of a body scanning mode in a local small and medium-scale weather observation process has the problems. If the specific weather can be automatically identified, the scanning in the specific weather area at the specific moment is realized, the time resolution of weather data acquisition in the specific weather observation process can be greatly improved, and the specific weather early warning and forecasting capacity is improved. How to realize the azimuth tracking detection of the local small and medium-scale weather is still a difficult problem in the industry at present.
The following difficulties mainly exist in realizing the azimuth tracking and detection of local small and medium-scale weather:
1. identification of specific weather: the method is characterized in that a weather radar needs to find a local weather process suitable for an azimuth tracking detection mechanism in a conventional scanning mode process, and azimuth tracking detection can be carried out on weather instead of any weather. Taking fig. 1 and fig. 2 as an example: FIG. 1 is a large-scale weather process not applicable to the azimuth tracking detection mechanism, without recognition; FIG. 2 illustrates a local weather process for which an azimuth tracking detection mechanism is applicable.
2. Determination of specific weather boundaries: it is referred to how to determine the tracking boundary of a specific weather after identifying or judging the specific weather. If the boundary is too large, the scanning time cannot be shortened, and the time resolution is improved; if the boundary is too small, the complete weather data is not detected and there is limited feedback on the weather process, such as the tracking boundary of some local weather process shown in FIG. 3.
3. Boundary feedback and implementation: after a specific weather boundary is determined, the boundary needs to be fed back to a control system of a weather radar, and a sector scanning area of a servo motor is determined by the control system of the weather radar.
4. Continuous tracking identification: the method refers to that a weather process is not fixed, but is continuously developed, a process of judging, determining a boundary, feeding back and re-identifying is required to be provided in each scanning period, and a mechanism for exiting a tracking mode is required to be established according to the weather condition.
As shown in fig. 4, a weather radar azimuth tracking and detecting method provided in an embodiment of the present invention is to solve the above problems, and establish a complete set of azimuth tracking and detecting mechanisms for specific weather, where the method includes the following steps:
step 1: data acquisition: and acquiring weather radar volume scanning data.
Generally, before entering an azimuth tracking detection mechanism (i.e., entering the weather radar azimuth tracking detection method of the present invention), a weather radar scans in a volume sweep mode, the volume sweep data may be combined echo data of elevation angles of each layer commonly used in the weather field, each layer refers to the number of beams in a pitch direction, taking a new generation weather radar VCP21 mode as an example, an individual sweep is completed, including 0-360 ° in azimuth direction and 9 beams in pitch direction, i.e., 9 elevation angles, each layer refers to all layers in the pitch direction. The combined echo data refers to the projection of the maximum value of the reflectivity intensity in all elevation angles on the ground, i.e. the combined echo data only displays the elevation angle with the maximum reflectivity intensity in all elevation angles. And the entering or exiting of the position tracking detection mechanism is realized through manual clicking.
Step 2: weather-specific determination or identification: and judging whether the specific weather exists according to the scanning data.
The scanning data is the volume scanning data obtained in step 1 or the sector scanning data obtained in step 6, and the specific weather determination or identification is mainly performed from two dimensions of orientation and reflectivity intensity by using the distribution of the volume scanning data (or the sector scanning data).
Step 1.1: the percentage of valid data a for each orientation is calculated from the volume scan data (or sector scan data).
Successive independent orientations are identified using the percentage of valid data a and the continuity for each orientation. In a specific embodiment of the present invention, the percentage a of valid data is equal to the percentage of the number of valid range bins to the total number of range bins, as shown in table 1, when the reflectivity intensity data of the weather radar is uploaded, a range bin with a numerical value is a valid range bin, a range bin without a numerical value is generally marked with "/" to obtain an invalid range bin, and the number of valid range bins is the sum of range bins with numerical values; the total distance library number is determined by the detection distance and the radial distance resolution at the beginning of the weather radar operation, for example, the detection distance is 45km, the radial distance resolution is 30m, and the total distance library number is 1500.
TABLE 1 weather Radar reflectivity intensity data
Step 1.2: and obtaining the number B of the continuous azimuth angles when the effective data percentage A is greater than a first set threshold value according to the effective data percentage A of each azimuth.
When the percentage of valid data A is greater than a first set threshold, the corresponding orientation is indicated as a valid orientation.
Step 1.3: and when the number B of the continuous azimuth angles is larger than a second set threshold value and smaller than half of the number of the body-scanning azimuth angles, the corresponding azimuth is identified as a continuous independent azimuth.
When the effective data percentage A exceeds a first set threshold value and the continuous azimuth angle quantity B exceeds a second set threshold value and is less than half of the body scanning azimuth angle quantity, the continuous independent azimuth can be identified, and the principle is as follows: weather data is a fragmented target, spanning multiple range bins and azimuths on a weather radar. The number of successive azimuth angles B is less than half of the number of body-swept azimuth angles, so as to avoid identifying a large-scale weather process as a specific weather, and improve the specific weather identification accuracy.
Step 1.4: in the consecutive independent azimuths, if the maximum value of the reflectivity intensity is equal to or greater than the third set threshold, then there is a specific weather.
After the continuous independent directions are identified, traversing the maximum value of the reflectivity intensity once in the continuous independent directions, and marking the weather process as strong weather when the maximum value of the reflectivity intensity is found to be more than or equal to a third set threshold value, namely judging the weather to be specific.
In one embodiment of the present invention, the first set threshold is 10%, the second set threshold is 10, and the third set threshold is 35dBZ, and the intensity of the local process such as heavy rain, hail, etc. is more than or equal to 35 dBZ. The first set threshold, the second set threshold and the third set threshold can be adjusted according to the detection effect in the process of azimuth tracking detection.
And step 3: when the scanning data is volume scanning data and no specific weather exists, turning to the step 1; when the scanning data is sector scanning data and no specific weather exists, quitting the azimuth tracking detection mechanism, and converting the weather radar into a body scanning mode; when there is a specific weather, go to step 4.
When the weather radar enters an azimuth tracking detection mechanism by manual clicking, the weather radar is in a body scanning mode, when the weather radar is in the body scanning mode (namely the acquired scanning data is the body scanning data) and no specific weather exists, the weather radar does not change the detection mode, the detection or scanning is continuously carried out in the body scanning mode, the step 1 is carried out, and the body scanning data is continuously acquired. When specific weather exists, the weather radar is converted into a sector scanning mode from a body scanning mode, the weather radar is detected or scanned in the sector scanning mode, when the specific weather is judged according to sector scanning data, the weather radar exits the sector scanning mode when the weather radar is in the sector scanning mode (namely the acquired scanning data is the sector scanning data) and the specific weather does not exist, the weather radar detects or scans in the body scanning mode (normal scanning mode), the step 1 is carried out, and if an azimuth tracking detection mechanism is to be exited, manual intervention exits. Whether the scanning mode is the body scanning mode or the sector scanning mode, when specific weather exists, the step 4 is carried out, and specific weather boundary determination is carried out.
And 4, step 4: and (3) weather boundary determination: taking the maximum point of the reflectivity intensity in a specific weather region as the center, carrying out diffusion identification towards the azimuth angles rotating clockwise and anticlockwise, and continuously identifyingnWhen an invalid echo is located, determining the position of the echoA starting azimuth and an ending azimuth for a particular weather region.
The weather boundary confirmation mainly utilizes a small-scale weather process in a local area, generally has a strong center, the strength of the center edge is gradually reduced to form a 'multi-layer degressive' echo, and the boundary of the specific weather process can be identified through the degressive rule. In the specific identification process, diffusion identification is carried out towards the azimuth angles rotating clockwise and anticlockwise by taking the maximum point of the reflectivity intensity as the center until continuous identification is carried outnAnd the invalid echo position can be determined as two position boundaries of the specific weather.
In one embodiment of the invention, 5. ltoreqn ≦ one-fourth of the number of body sweep azimuths, e.g., 240, then 5 ≦n Less than or equal to 60, specifically,nset to 10.
As shown in fig. 5, a weather radar generally uses 5dB as a color scale, and the weather process extends 7 color scales (i.e. 7 layers) in each of the left and right directions (i.e. clockwise and counterclockwise rotation azimuths), and after the extension, the null echo azimuth is obtained.
And 5: determining, by the weather radar control system, a sweep angle range: and sending the starting azimuth angle and the ending azimuth angle to a weather radar control system, determining a fan-shaped scanning angle range by the weather radar control system according to the starting azimuth angle and the ending azimuth angle, and performing fan-shaped scanning in a specific weather area according to the fan-shaped scanning angle range.
The starting azimuth angle and the ending azimuth angle are fed back to a control system of the weather radar through a communication protocol, the weather radar control system adds acceleration and deceleration angle information of rotation of the servo motor after receiving the starting azimuth angle and the ending azimuth angle to form a sector scanning angle range (different weather radar servo acceleration and deceleration angle information is different), the sector scanning angle range is transmitted to the weather radar servo motor system, and the servo motor system carries out sector scanning in the sector scanning angle range. The acceleration and deceleration angle information is added to ensure that the servo motor system performs constant-speed scanning in a specific weather boundary, so that the weather data quality is ensured.
In one embodiment of the present invention, the fan sweep angle range is [ φ 1- θ, φ 2 + θ ], where φ 1 is the start azimuth, φ 2 is the end azimuth, and θ is the weather radar servo motor rotation acceleration and deceleration angle information. For example, if the starting azimuth angle is 20 degrees, the ending azimuth angle is 80 degrees, and the acceleration and deceleration angle of the rotation of the servo motor is 8 degrees, the range of the fan sweep angle is: 12 to 88 degrees.
In one embodiment of the present inventionmMaintaining a sector scan for a scan period in whichm≥3，mPreferably a total of 5 a, preferably,mthe sector scanning is kept in each scanning period to ensure the validity of the detection data of the weather radar, and the problem that the angle switching cost is too large due to too frequent change of the sector scanning angle and the time resolution of weather data acquisition is influenced is prevented.
And 6: and (4) acquiring weather radar sector scanning data, and repeating the steps 2-5 to realize the continuous tracking detection of the weather radar azimuth.
And continuously tracking and detecting the orientation of the weather radar, and quitting the orientation tracking and detecting mechanism when specific weather is not identified, and converting into a normal body scanning mode.
The embodiment of the invention also provides a weather radar azimuth tracking detection system which is in communication connection with the control system of the weather radar.
The data acquisition unit is in communication connection with the control system and used for acquiring weather radar scanning data, and the scanning data is body scanning data or sector scanning data.
And the judging unit is used for judging whether the specific weather exists according to the scanning data of the data acquisition unit. The judgment unit is specifically configured to: calculating the effective data percentage A of each azimuth according to the scanning data; obtaining the number B of continuous azimuth angles when the effective data percentage A is larger than a first set threshold value according to the effective data percentage A of each azimuth; when the number B of the continuous azimuth angles is larger than a second set threshold value, the corresponding azimuth is identified as a continuous independent azimuth; in the consecutive independent azimuths, if the maximum value of the reflectivity intensity is equal to or greater than the third set threshold, then there is a specific weather.
Boundary determination unit and controlThe system communication connection is used for carrying out diffusion identification towards the azimuth angles rotating clockwise and anticlockwise by taking the maximum point of the reflectivity intensity in a specific weather region as the center when specific weather exists, and when the diffusion identification is continuously carried outnWhen the azimuth of the ineffective echo is determined, determining a starting azimuth and an ending azimuth of the specific weather area, and sending the starting azimuth and the ending azimuth to a control system of the weather radar, so that the weather radar control system determines a fan-shaped scanning angle range according to the starting azimuth and the ending azimuth, and performs fan-shaped scanning in the specific weather area according to the fan-shaped scanning angle range; wherein, 5 is less than or equal ton Less than or equal to one fourth of the number of the body sweeping azimuth angles.
The embodiment of the invention also provides a weather radar, which comprises a control system and the weather radar azimuth tracking detection system; and the weather radar azimuth tracking detection system is in communication connection with the control system.
The embodiment of the invention also provides a weather radar azimuth tracking and detecting device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the weather radar azimuth tracking and detecting method.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program in the computer device. For example, the computer program may be divided into a data acquisition unit, a judgment unit, and a boundary determination unit, each unit functioning specifically as described above.
The device may be a desktop computer, a notebook, a palm top computer, a cloud server, or other computing device. The apparatus may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the weather radar position tracking detection system is merely an example of a device and does not constitute a limitation on the device and may include more or fewer components than the system, or some components in combination, or different components, e.g., the device may also include input-output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be used to store the computer programs and/or modules, and the processor may implement the various functions of the weather radar position tracking detection system by running or executing the computer programs and/or modules stored in the memory and invoking the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The computer program, when executed by a processor, performs the steps of the weather radar position tracking detection method.
The weather radar position tracking detection system integrated module/unit can be stored in a computer readable storage medium if it is implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer-readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.
Claims (9)
1. A weather radar azimuth tracking detection method is characterized by comprising the following steps:
step 1: acquiring weather radar scanning data;
step 2: judging whether specific weather exists according to the scanning data, and specifically realizing the following processes:
calculating the effective data percentage of each azimuth according to the scanning data;
obtaining the number of continuous azimuth angles when the effective data percentage is larger than a first set threshold value according to the effective data percentage of each azimuth;
when the number of the continuous azimuth angles is larger than a second set threshold value and smaller than half of the number of the body-scanning azimuth angles, the corresponding azimuth is identified as a continuous independent azimuth;
in the consecutive independent orientations, if a maximum value of the reflectivity intensity is greater than or equal to a third set threshold, then there is a particular weather;
wherein the scanning data is volume scanning data or sector scanning data; the specific weather refers to local small and medium-scale weather within a radar scanning range;
and step 3: when the scanning data is volume scanning data and no specific weather exists, turning to step 1; when the scanning data is sector scanning data and no specific weather exists, the weather radar is switched to a body scanning mode, and the step 1 is carried out; when specific weather exists, turning to step 4;
and 4, step 4: taking the maximum point of the reflectivity intensity in a specific weather region as the center, carrying out diffusion identification towards the azimuth angles rotating clockwise and anticlockwise, and continuously identifyingnWhen the echo azimuth is invalid, determining a starting azimuth and an ending azimuth of the specific weather area; wherein, 5 is less than or equal ton Less than or equal to one fourth of the number of the body sweeping azimuth angles;
and 5: sending the starting azimuth angle and the ending azimuth angle to a weather radar, determining a fan-shaped scanning angle range by the weather radar according to the starting azimuth angle and the ending azimuth angle, and performing fan-shaped scanning in the specific weather area according to the fan-shaped scanning angle range;
step 6: and (4) acquiring weather radar sector scanning data, and repeating the steps 2-5 to realize the continuous tracking detection of the weather radar azimuth.
2. The weather radar azimuth tracking detection method of claim 1, wherein the percentage of valid data is equal to a percentage of a number of valid range bins to a number of total range bins.
3. The weather radar azimuth tracking detection method of claim 1, wherein the first set threshold is 10%, the second set threshold is 10, and the third set threshold is 35 dBZ.
4. The method as claimed in any one of claims 1 to 3, wherein in step 5, the sweep angle range is [ φ 1- θ, φ 2 + θ ], where φ 1 is a start azimuth angle, φ 2 is an end azimuth angle, and θ is weather radar servo motor rotation acceleration and deceleration angle information.
5. The weather radar azimuth tracking detection method of claim 1, wherein in step 5, inmMaintaining a sector scan for a scan period in whichm≥3。
6. A weather radar position tracking detection system in communication with a weather radar control system, the position tracking detection system comprising:
the weather radar scanning device comprises a data acquisition unit, a data processing unit and a data processing unit, wherein the data acquisition unit is used for acquiring weather radar scanning data which is normal scanning data or sector scanning data;
the judging unit is used for judging whether specific weather exists according to the scanning data; the specific weather refers to local small and medium-scale weather within a radar scanning range; the judgment unit is specifically configured to: calculating the effective data percentage of each azimuth according to the scanning data; obtaining the number of continuous azimuth angles when the effective data percentage is larger than a first set threshold value according to the effective data percentage of each azimuth; when the number of the continuous azimuth angles is larger than a second set threshold value and smaller than half of the number of the body-scanning azimuth angles, the corresponding azimuth is identified as a continuous independent azimuth; in the consecutive independent orientations, if a maximum value of the reflectivity intensity is greater than or equal to a third set threshold, then there is a particular weather;
a boundary determining unit for performing diffusion identification to clockwise and counterclockwise rotating azimuth angles by taking the maximum point of the reflectivity intensity in the specific weather region as the center when the specific weather exists, and continuously identifyingnWhen the position of the invalid echo is determinedDetermining a starting azimuth angle and an ending azimuth angle of a weather area, and sending the starting azimuth angle and the ending azimuth angle to a weather radar so that the weather radar can determine a fan-shaped scanning angle range according to the starting azimuth angle and the ending azimuth angle, and can perform fan-shaped scanning in the specific weather area according to the fan-shaped scanning angle range; wherein, 5 is less than or equal ton Less than or equal to one fourth of the number of the body sweeping azimuth angles.
7. A weather radar, characterized by: comprising a control system and a weather radar azimuth tracking detection system according to claim 6; and the weather radar azimuth tracking detection system is in communication connection with the control system.
8. A weather radar azimuth tracking detection device, comprising: a memory for storing a computer program; a processor for implementing the steps of the weather radar position tracking detection method as claimed in any one of claims 1 to 5 when executing the computer program.
9. A storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the weather radar position tracking detection method according to any one of claims 1 to 5.
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