CN111856511A - DBS wind field scanning method capable of changing scanning included angle - Google Patents
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
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Abstract
The invention discloses a DBS wind field scanning method for changing a scanning included angle, which adjusts the cone scanning half angle of any shielded wave beam to be gamma1And establishing a rectangular coordinate system by taking the radar as an origin, reconstructing a relational expression of each radial wind speed and each wind direction vector, and performing inversion processing on the radial speeds in the four continuous directions to obtain three-dimensional wind field information formed by the horizontal wind speed, the wind direction and the vertical airflow. And then, carrying out detailed analysis on an error source of the improved DBS wind field inversion algorithm, and ensuring that the value range of the cone scanning half angle is strictly controlled, so that the measurement precision of the real three-dimensional wind field meets the corresponding requirement. The method can avoid the failure of the conventional algorithm caused by the shielding of the radar scanning wave beam, and effectively improve the inversion accuracy of the wind field.
Description
Technical Field
The invention belongs to the technical field of DBS wind field inversion based on a wind measuring radar, and relates to a DBS wind field scanning method for changing a scanning included angle.
Background
Wind field information is one of main meteorological factors for atmospheric detection, the time-space variation characteristics of the wind field information are important meteorological data, and the wind field information has strict requirements on accurate detection in the fields of conventional weather forecast, disastrous weather monitoring, pollutant drift research, low-altitude wind shear early warning, airplane take-off and landing guarantee and the like. The laser wind measuring radar is a novel wind field detection means, has strong anti-interference capability and high data resolution, and can effectively make up the defects of a weather radar and a wind profile radar in the low-altitude wind field detection capability. When the wind contour line mode (DBS) scanning is carried out, the wind field fluctuation situation from the aircraft decision height of 30m to the height of 3000m can be accurately monitored, and fine wind field data guarantee support is provided for civil aviation, navigation and take-off and landing of carrier-based aircrafts. Under the normal condition, when the laser radar performs DBS scanning, four beams with fixed azimuth angle intervals and symmetrical cone scanning elevation angles are required to be accumulated, but the four beams are influenced by natural environment, geographical position, human reasons and the like, so that the installation position of the radar is limited, any scanning beam of the radar is blocked, the conventional DBS wind field inversion algorithm is invalid, and data products such as air profile lines, vertical air flow and the like cannot be effectively inverted. In order to guarantee the effectiveness of a DBS wind field inversion algorithm of the laser radar, an improved method for adjusting the conical scanning angle of the shielded wave beam is provided, then an inversion equation is reconstructed, the horizontal wind speed and direction and the vertical airflow are deduced and obtained, the error source of the improved DBS wind field inversion algorithm is analyzed in detail, the value range of the influence factors is strictly controlled, and the real three-dimensional wind field measurement quantity meets the development requirement. To date, few have proposed reasonably effective research to address this problem.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: aiming at the defects of the prior art, the variable angle DBS wind field inversion method with high accuracy and reasonable calculation is provided.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a DBS wind field scanning method for changing a scanning angle, which comprises the following steps:
when variable-angle DBS scanning detection is carried out, the radar 1 scans and measures wind field data of a target airspace 2 normally, four beams with fixed azimuth angle intervals are sent out, radar scanning beams are shielded due to the fact that the radar is limited in installation position, and the cone scanning half angle of any shielded beam is adjusted to be gamma1The cone scan half angles of the remaining three beams are still gamma. And establishing a rectangular coordinate system by taking the radar as an origin, and reconstructing a relational expression of each radial wind speed and each wind direction vector. The radial velocities in the four continuous directions can be inverted to obtain three-dimensional wind field information formed by horizontal wind speed, wind direction and vertical airflow. And the error source of the improved DBS wind field inversion algorithm is analyzed in detail, and the value range of the influence factors is strictly controlled, so that the real three-dimensional wind field detection amount meets the development requirement.
(III) advantageous effects
Compared with the prior art, the DBS wind field scanning method for changing the scanning included angle has the following beneficial effects:
(1) the precision is high.
The invention reads out the azimuth angle theta and the conical scanning elevation angle gamma of the radar wave beam through the laser radar tilt angle sensor and the azimuth sensor, and can completely meet the precondition of local uniformity and isotropy because the laser radar scans quickly. And performing meteorological detection according to a set scanning mode to obtain three-dimensional wind field information formed by horizontal wind speed, wind direction and vertical airflow, and correcting the result by using a coordinate transformation method in space geometry so as to obtain the wind field information at the target height layer. Because the sensor is sensitive, even if the sensor has small deviation, the sensor can be corrected, and the measurement precision of the wind field is greatly improved.
(2) And the calculation is simple.
The method is not limited by the installation positions of the radar and the radar, has less scanning wave beams compared with other wind field inversion algorithms, can directly detect the convection vertical movement speed of the atmospheric wind field in the vertical direction, ensures the accuracy of the wind field inversion algorithm, and has the advantages of intuition, flexibility, small calculation amount and concise calculation.
According to the invention, the problem of failure of a conventional DBS algorithm caused by beam shielding is solved by adjusting any shielding beam cone scanning angle and reconstructing a wind field inversion equation. The improved chromatic algorithm widens the measuring condition of the radar and the installation condition of the radar, improves the inversion capability of the wind field, and solves the problems of severe use condition and low measuring accuracy in the prior art.
The invention selects two radars for comparison test, tests by using real wind field data, and verifies the feasibility and the correctness of the invention.
The invention is applicable to any wind-finding radar.
Drawings
Fig. 1 is a schematic diagram of a normal-case radar DBS scan according to the present invention.
Fig. 2 is a schematic diagram of variable angle DBS scanning under any beam occlusion condition according to the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
See fig. 1 and 2. According to the invention, when variable-angle DBS scanning detection is carried out, the radar (1) normally scans and measures wind field data of a target airspace (2), four beams with fixed azimuth angle intervals are sent out, radar scanning beams are shielded due to limited radar installation positions, and at the moment, the cone scanning half angle of any shielded beam is adjusted to be gamma 1The cone scan half angles of the remaining three beams are still gamma. And establishing a rectangular coordinate system by taking the radar as an origin, and reconstructing a relational expression of each radial wind speed and each wind direction vector. The radial velocities in the four continuous directions can be inverted to obtain three-dimensional wind field information formed by horizontal wind speed, wind direction and vertical airflow. And the error source of the improved DBS wind field inversion algorithm is analyzed in detail, and the value range of the influence factors is strictly controlled, so that the real three-dimensional wind field measurement quantity meets the development requirement.
In fig. 2, the wind field vector is set to remain unchanged during DBS scanning, with the four beam transmit directions separated by 90 °. Establishing a rectangular coordinate system by taking the position of the radar (1) as an origin, and setting a wind vector as (u, v, w), wherein u is along an x axis, v is along a y axis, w is along a z axis, a cone scanning half angle gamma is an included angle between a beam direction and the z positive axis, and a scanning azimuth angle theta takes the x coordinate positive axis as a 0-degree starting point; that is, the radial wind speeds measured in four directions are respectively VR1，VR2，VR3，VR4The azimuth angles theta of four beams of the radar are read by a tilt sensor and an azimuth sensor arranged on the radar (1)1，θ2，θ3，θ4And a cone scanning included angle gamma, calculating the radial speeds of the four scanning directions by taking the radar (1) as an original point according to a preset criterion:
If the coordinate axes x and y are respectively superposed with East and North directions, the four scanning azimuth angles of the wind measuring radar are aligned with E, N, W and S directions, namely theta1，θ2，θ3，θ4Respectively at 0 °, 90 °, 180 °, 270 °, the measurable projection components of the three-dimensional true wind vector on the x, y, and z axes are:
if the west wave beam is blocked, the cone scanning angle in the VRW direction is adjusted to be gamma 1, the cone scanning angles in the other three directions are still gamma, and the radar (1) can scan according to a preset detection mode to measure three-dimensional wind field information of horizontal wind speed, wind direction and vertical airflow on an actual detection airspace (2).
The reconstructed three-dimensional wind field projection components are as follows:
then the horizontal wind speed VHAnd the horizontal wind direction α is:
in the triangular coordinate, the angle value alpha directly calculated by the arctan function is not the wind direction angle value in meteorology, and the following conversion is needed:
when in use
When the temperature of the water is higher than the set temperature,
when in use
When the temperature of the water is higher than the set temperature,
after the horizontal wind speed and the horizontal wind direction are calculated, the error sources are estimated as follows:
the same can be obtained:
namely: the horizontal wind speed and direction error is not only related to the radial wind speed error and the cone scanning half angle, but also related to the wind speed, and the value range of the above influence factors is strictly controlled, so that the horizontal wind speed and direction error can meet the development requirements.
The results of the invention were compared using two radars. In the verification of real wind field data, a No. 1 radar is used as a standard device, the cone scanning half angles of four beams of the No. 1 radar are all gamma, the cone scanning half angles of four beams of the No. 2 radar are also all gamma, the two radars start to measure at the same time, 1-hour data are recorded, and the wind field error is calculated; then, the method of the invention is utilized to set the No. 2 radar as the western beam, and the cone scanning half angle is gamma1Recording 1 hour data and calculating the wind field error of the conical scanning half angles of the other three beams which are gamma; comparing the wind field errors of the two periods, the deviation of the two periods is very small, the horizontal wind speed error is not more than 0.3m/s, the horizontal wind direction error is not more than 5 degrees, and the vertical airflow error is not more than 0.2 m/s. The invention proves to be reliable and effective.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A DBS wind field scanning method for changing a scanning included angle is characterized in that the method comprises the following processes:
S1: when variable-angle DBS scanning detection is carried out, the radar normally scans and measures wind field data of a target airspace and sends out four beams with fixed azimuth angle intervals;
s2: when radar scanning beams are shielded, adjusting the cone scanning half angle of any shielded beam to be gamma1The half angle of the cone scan of the other three beams is kept as gamma-variable1≠γ；
S3: establishing a rectangular coordinate system by taking a radar as an origin, and reconstructing a relational expression of each radial wind speed and each wind direction vector;
s4: and obtaining three-dimensional wind field information formed by horizontal wind speed, wind direction and vertical airflow through inversion processing of the radial speeds in the continuous four directions.
2. The method for wind field scanning for DBS with changed scan angle as claimed in claim 1, wherein in step S1, the wind field vector is set to remain unchanged during DBS scanning, and the four beam emitting directions are separated by 90 °.
3. The DBS wind field scanning method according to claim 2, wherein in the process S3, a rectangular coordinate system is established with the position of the radar as the origin, and if the wind vector is (u, v, w), u is along the x-axis, v is along the y-axis, w is along the z-axis, the cone scanning half-angle γ is the angle between the beam direction and the z-axis, and the scanning azimuth θ is started from the x-axis as 0 degree; that is, the radial wind speeds measured in four directions are respectively V R1，VR2，VR3，VR4The azimuth angles theta of four beams of the radar are read by a tilt sensor and an azimuth sensor arranged on the radar1，θ2，θ3，θ4And a cone scanning included angle gamma, calculating the radial wind speed in four scanning directions by taking the radar as an original point according to a preset criterion:
4. the method according to claim 3, wherein in step S3, if the coordinate axes x and y are coincident with East and North directions, respectively, then the four scanning azimuth angles of the wind radar are aligned with E, N, W and S directions, i.e. θ1，θ2，θ3，θ4Respectively at 0 deg., 90 deg., 180 deg., 270 deg., the measurable three-dimensional real wind vector projection component V on x, y, z axisRE，VRN，VRW，VRSComprises the following steps:
5. the method for scanning the wind field for DBS with changed scan angle as claimed in claim 4, wherein in step S4, if the west beam is blocked, the V is adjustedRWCone scan angle of direction gamma1The scanning angles of the cones in the other three directions are still gamma, and the radar scans and measures the three-dimensional wind field information of the horizontal wind speed, the wind direction and the vertical airflow in the actual detection airspace according to a preset detection mode;
the reconstructed three-dimensional wind field projection components are as follows:
then the horizontal wind speed VHAnd the horizontal wind direction α is:
in the triangular coordinate, the angle value alpha directly calculated by the arctan function is not the wind direction angle value in meteorology, and the following conversion is needed:
When in use
When the temperature of the water is higher than the set temperature,
when in use
When the temperature of the water is higher than the set temperature,
6. the method for scanning a DBS wind field with a changed scan angle according to claim 5, further comprising an error analysis process: after the horizontal wind speed and the horizontal wind direction are calculated, the error sources are estimated as follows:
the same can be obtained:
namely: the horizontal wind speed and direction error is not only related to the radial wind speed error and the cone scanning half angle, but also related to the wind speed, and the value range of the above influence factors is strictly controlled, so that the horizontal wind speed and direction error can meet the development requirements.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113050115A (en) * | 2021-04-08 | 2021-06-29 | 北京观详光电技术有限公司 | Laser radar wind field data reconstruction method, system and equipment |
| CN113138374A (en) * | 2021-04-08 | 2021-07-20 | 北京观详光电技术有限公司 | Laser radar wind field data reconstruction method and system |
| CN115097770A (en) * | 2022-08-25 | 2022-09-23 | 中关村科学城城市大脑股份有限公司 | Automatic shielding system, shielding device control method, electronic device, and medium |
| CN115980786A (en) * | 2022-12-20 | 2023-04-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Wind profile monitoring method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5930019A (en) * | 1996-12-16 | 1999-07-27 | Fuji Xerox Co., Ltd. | Light scanning device, optical device, and scanning method of optical device |
| US20140300888A1 (en) * | 2011-11-29 | 2014-10-09 | Flidar | Motion-stabilised lidar and method for wind speed measurement |
| CN110288856A (en) * | 2019-06-21 | 2019-09-27 | 中国民用航空总局第二研究所 | The Scheduled Flight monitoring system and method for fine forecast based on wind |
| CN110456382A (en) * | 2019-07-12 | 2019-11-15 | 中国海洋大学 | The measurement method of inhomogeneous winds wind vector based on single Doppler lidar |
| US20200124026A1 (en) * | 2017-06-21 | 2020-04-23 | IFP Energies Nouvelles | Method for acquiring and modelling an incident wind field by means of a lidar sensor |
-
2020
- 2020-07-07 CN CN202010647036.4A patent/CN111856511A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5930019A (en) * | 1996-12-16 | 1999-07-27 | Fuji Xerox Co., Ltd. | Light scanning device, optical device, and scanning method of optical device |
| US20140300888A1 (en) * | 2011-11-29 | 2014-10-09 | Flidar | Motion-stabilised lidar and method for wind speed measurement |
| US20200124026A1 (en) * | 2017-06-21 | 2020-04-23 | IFP Energies Nouvelles | Method for acquiring and modelling an incident wind field by means of a lidar sensor |
| CN110288856A (en) * | 2019-06-21 | 2019-09-27 | 中国民用航空总局第二研究所 | The Scheduled Flight monitoring system and method for fine forecast based on wind |
| CN110456382A (en) * | 2019-07-12 | 2019-11-15 | 中国海洋大学 | The measurement method of inhomogeneous winds wind vector based on single Doppler lidar |
Non-Patent Citations (3)
| Title |
|---|
| 李丽;王灿召;谢亚峰;董光焰;: "扫描式测风激光雷达的风场反演", 中国光学, no. 02 * |
| 李策;刘俊伟;赵培娥;周杰;谢日华;罗雄;周鼎富;: "机动型激光测风雷达倾斜风场修正算法研究", 激光技术, no. 03 * |
| 李策等: "3维激光测风雷达技术研究", 激光技术, vol. 41, no. 5, pages 704 - 705 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113050115A (en) * | 2021-04-08 | 2021-06-29 | 北京观详光电技术有限公司 | Laser radar wind field data reconstruction method, system and equipment |
| CN113138374A (en) * | 2021-04-08 | 2021-07-20 | 北京观详光电技术有限公司 | Laser radar wind field data reconstruction method and system |
| CN115097770A (en) * | 2022-08-25 | 2022-09-23 | 中关村科学城城市大脑股份有限公司 | Automatic shielding system, shielding device control method, electronic device, and medium |
| CN115980786A (en) * | 2022-12-20 | 2023-04-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Wind profile monitoring method and system |
| CN115980786B (en) * | 2022-12-20 | 2023-07-25 | 中国能源建设集团广东省电力设计研究院有限公司 | Wind profile monitoring method and system |
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