CN116449355A - Radar terrain matching scanning method - Google Patents
Radar terrain matching scanning method Download PDFInfo
- Publication number
- CN116449355A CN116449355A CN202210019447.8A CN202210019447A CN116449355A CN 116449355 A CN116449355 A CN 116449355A CN 202210019447 A CN202210019447 A CN 202210019447A CN 116449355 A CN116449355 A CN 116449355A
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- China
- Prior art keywords
- radar
- scanning
- elevation
- antenna
- angle
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Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000012876 topography Methods 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 2
- 230000006855 networking Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- 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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a radar topography matching scanning (Terrain matching scan) method. According to the invention, radar hardware equipment is not required to be added, and the low-altitude target information can be rapidly captured only by adding the algorithm software. The cost is saved, the target capturing time is saved, and the radar detection capability is improved.
Description
Technical Field
The invention belongs to the field of surveying and mapping, and particularly relates to a radar antenna scanning elevation angle which changes along with the change of a terrain shielding angle, namely the azimuth and the pitching of a radar antenna servo system can change in a scanning process. Is an innovation of a radar scanning mode.
Background
Since the advent of radars in the early 20 th century, whether military or civilian, the antenna scanning method has mainly included: planar position scanning, range height scanning, fixed point or pointing detection.
The plane position scanning is a scanning mode of the radar antenna with unchanged elevation angle and changed azimuth angle, and mainly comprises the steps of obtaining plane position information of a target object; including all-round (360 degrees) planar position scanning, planar position scanning of a sector (within a range of orientations), and stereo scanning in combination with more than a fixed elevation planar position scanning.
The distance and height scanning is a scanning mode of the radar antenna with unchanged azimuth angle and elevation angle, and mainly comprises the steps of obtaining the distance and height information of a target object; including range-height scanning of 0-90 degrees, range-height scanning of a sector (in a range of elevation angles), and stereo scanning of a combination of range-height scans over a fixed azimuth angle (this scanning is less common).
Fixed point or directional detection is a scanning mode with the azimuth angle and elevation angle of a radar antenna unchanged, and mainly acquires fine information such as distance information and morphology of a target object.
The three radar scanning modes play respective advantages for different detection tasks. However, there are certain drawbacks to the rapid detection of low-altitude targets currently approaching the ground. The planar position scanning needs multiple layers of scanning with fixed elevation angles to avoid the influence of ground features to acquire target information, and time is needed as a cost. Range-height scanning cannot capture an omnidirectional low-altitude target quickly, which is more time-consuming than planar position scanning. Fixed-point or directional detection is difficult to directly capture low-altitude targets, and fine directional detection needs to be carried out on the basis of other scanning information.
The radar terrain matching scanning overcomes the defect that the scanning mode detects low-altitude targets, particularly targets close to the ground, can avoid interference of clutter and waves of the ground, and can capture target information quickly.
Disclosure of Invention
With the increase of the low-altitude target detection demand, the interference of clutter of ground objects is avoided, the scanning elevation angle of a radar antenna is required to change along with the change of the terrain shielding angle, and the low-altitude target information is required to be captured as soon as possible.
The invention aims to provide a radar terrain matching scanning method capable of rapidly acquiring low-altitude target information closest to the ground.
The radar terrain matching scanning method comprises the following steps:
1) Acquiring shielding angle data in a radar coverage area, and establishing a relation (1) of a shielding angle Y and an azimuth angle X:
Y＝f(X) (1)
2) According to the elevation speed and the horizontal rotation speed of the radar antenna servo system in the step (1), a plurality of radar antenna elevation starting lifting points and radar antenna elevation starting descending points are selected in azimuth.
3) Performing topography matching scanning:
-determining the radar north direction and starting scanning;
-pitch actuation of the servo system when the antenna rotates to the elevation start elevation point and the descent start point;
when the elevation angle of the antenna changes, the radar sampling speed is larger than the elevation angle lifting speed of the antenna, so that a plurality of scanning rays with different elevation angles are obtained in the same direction, and if the scanning rays are directly displayed on a two-dimensional plane, a space error is caused; therefore, the scanning rays with the largest elevation angle are reserved in the same azimuth in the elevation angle lifting process, and the scanning rays with the smallest elevation angle are reserved in the same azimuth in the elevation angle descending process, so that only one scanning ray avoiding the interference of clutter of ground objects in one azimuth is ensured, and the scanning rays closest to the ground are reserved.
4) And (3) finishing one scanning period of the radar, and finishing one-time terrain matching scanning.
The invention has the advantages that:
the low-altitude target information can be captured more quickly by only adding the algorithm software without adding radar hardware equipment. The cost is saved, the target capturing time is saved, and the radar detection capability is improved.
Drawings
Without any means for
Detailed Description
The following are embodiments of the present invention.
The radar terrain matching scanning method comprises the following steps:
1. on a radar array, acquiring shielding angle data in a radar coverage area by using a theodolite, a total station or directly from a high-resolution geographic information system, and establishing a functional relation Y=f (X) of a shielding angle Y and an azimuth angle X.
2. And according to Y=f (X), the elevation speed W and the horizontal rotating speed V of the radar antenna servo system, a plurality of radar antenna elevation starting lifting points and radar antenna elevation starting descending points are selected in azimuth.
3. Implementing topography matching scans
3.1 scheme one
3.1.1 according to Y=f (X), the pitching and lifting speed W of the radar antenna servo system and the radar sampling interval dt, calculating a corresponding relation formula N=p (X) of the number N of radar scanning lines in each sampling azimuth and the azimuth angle X.
3.1.2 determining the radar north direction and starting scanning.
3.1.3 when the antenna rotates to the elevation start elevation point and the descent start point, the pitch of the servo system starts.
3.1.4, reserving the scanning rays with the largest elevation angle in the same azimuth in the elevation angle lifting process, and reserving the scanning rays with the smallest elevation angle in the same azimuth in the elevation angle descending process so as to ensure that only one scanning ray avoiding the interference of clutter of ground objects in one azimuth is closest to the ground.
3.1.5 the radar finishes one scanning period, and one terrain matching scanning is finished.
3.2 scheme two
3.2.1 determining the radar north direction and starting scanning.
3.2.2 when the antenna rotates to the elevation start elevation point and the descent start point, the pitch of the servo system starts.
3.2.3 after completing one scanning cycle, all scanning lines with azimuth and pitch angle information are re-analyzed. The scanning rays with the largest elevation angle are reserved in the same azimuth in the elevation angle lifting process, and the scanning rays with the smallest elevation angle are reserved in the same azimuth in the elevation angle descending process, so that only one scanning ray avoiding the interference of clutter of ground objects in one azimuth is ensured, and the scanning rays closest to the ground are reserved.
3.2.4 the one time topography matching scan ends.
Finally, it should be noted that the purpose of the disclosed embodiments is to aid in further understanding of the invention, but those skilled in the art will appreciate that: various alternatives and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the disclosed embodiments, but rather the scope of the invention is defined by the appended claims.
Claims (3)
1. A radar topography matching scanning (Terrain matching scan) method is a scanning mode that in a radar detection range, in order to obtain low-altitude target information closest to the ground and avoid interference of clutter of the ground, an antenna scanning elevation angle changes along with the change of a topography shielding angle. The method is characterized by comprising the following steps of:
1) Acquiring shielding angle data in a radar coverage area, and establishing a relation (1) of a shielding angle Y and an azimuth angle X:
Y＝f(X) (1)
2) According to the elevation speed and the horizontal rotation speed of the radar antenna servo system in the step (1), a plurality of radar antenna elevation starting lifting points and radar antenna elevation starting descending points are selected in azimuth.
3) Performing topography matching scanning:
-determining the radar north direction and starting scanning;
-pitch actuation of the servo system when the antenna rotates to the elevation start elevation point and the descent start point;
when the elevation angle of the antenna changes, the radar sampling speed is larger than the elevation angle lifting speed of the antenna, so that a plurality of scanning rays with different elevation angles are obtained in the same direction, and if the scanning rays are directly displayed on a two-dimensional plane, a space error is caused; therefore, the scanning rays with the largest elevation angle are reserved in the same azimuth in the elevation angle lifting process, and the scanning rays with the smallest elevation angle are reserved in the same azimuth in the elevation angle descending process, so that only one scanning ray avoiding the interference of clutter of ground objects in one azimuth is ensured, and the scanning rays closest to the ground are reserved.
4) And (3) finishing one scanning period of the radar, and finishing one-time terrain matching scanning.
2. A method of radar terrain matching scanning (Terrain matching scan) as claimed in claim 1, wherein the radar comprises various models of microwave, laser each band and various library lengths of radar.
3. A method of radar terrain matching scanning (Terrain matching scan) as claimed in claim 1, wherein the radar comprises single-part radar measurements and multi-part radar networking measurements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210019447.8A CN116449355A (en) | 2022-01-10 | 2022-01-10 | Radar terrain matching scanning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210019447.8A CN116449355A (en) | 2022-01-10 | 2022-01-10 | Radar terrain matching scanning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116449355A true CN116449355A (en) | 2023-07-18 |
Family
ID=87134327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210019447.8A Pending CN116449355A (en) | 2022-01-10 | 2022-01-10 | Radar terrain matching scanning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116449355A (en) |
-
2022
- 2022-01-10 CN CN202210019447.8A patent/CN116449355A/en active Pending
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