Radar pitching scanning range test method

Abstract

The invention provides a radar pitching scanning range test method. The method comprises the steps that an unmanned aerial vehicle performs radial motion away from a radar from a set distance right above the radar to be tested; the vehicle moves radially close to the radar from a set distance from the radar; the unmanned aerial vehicle and the vehicle are located in the same quadrant range; the radar records tracking data of the unmanned aerial vehicle and the vehicle, and determines a radar pitching scanning range according to the target position information of the unmanned aerial vehicle at the target discovery moment, the target position information of the vehicle at the target loss moment and the radar position information.

Description

Technical Field

[0001] This invention belongs to the field of radar testing and verification technology, specifically a method for testing radar elevation scanning range. Background Technology

[0002] Radar elevation scanning range refers to the maximum angular interval that a radar can cover or scan in the vertical direction (elevation angle) of its antenna beam. It is an important indicator of radar performance, and its testing and verification methods need to be scientific and highly operable. Because tests related to aerial targets and vehicle targets are subject to various restrictions such as airspace and administrative management, and are very costly, high demands are placed on the scientific rigor and operability of their testing methods. Summary of the Invention

[0003] This invention proposes a method for testing radar elevation scanning range.

[0004] The technical solution to achieve the objective of this invention is: a radar elevation scanning range testing method, comprising:

[0005] The drone moves radially away from the radar at a predetermined distance directly above it.

[0006] The vehicle moves radially toward the radar from a distance set by the radar.

[0007] The drone and the vehicle are located in the same quadrant of the radar;

[0008] The radar records tracking data of drones and vehicles, and determines the radar elevation scanning range based on the target position information at the time the drone detects the target, the target position information at the time the vehicle loses the target, and the radar position information.

[0009] Preferably, the UAV takes off from a predetermined distance directly above the radar and moves at a constant speed in the radial direction away from the radar.

[0010] Preferably, the vehicle moves at a constant speed in the radial direction close to the radar.

[0011] Preferably, the vehicle surface is provided with a reflector.

[0012] Preferably, the UAV's flight range is 0 to 1000 meters from the radar, and the flight angle meets the requirement of full radial flight.

[0013] Preferably, a positioning device is installed at the location of the radar, on the drone, and on the vehicle, and the positioning devices operate at the same time.

[0014] Preferably, the time synchronization equipment on the vehicle and the radar's own time synchronization equipment are synchronized.

[0015] Preferably, the angle formed by the target position at the moment the UAV target is detected, the target position at the moment the medium-sized vehicle target is lost, and the radar position is the radar elevation scanning range.

[0016] Compared with the prior art, the significant advantages of this invention are: this invention can measure the upper and lower edges of the radar elevation angle and accurately measure the radar elevation scanning range; moreover, the experiment has a high success rate and good operability.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 An experimental scenario diagram for a radar elevation scanning range testing method. Detailed Implementation

[0019] A method for testing radar elevation scanning range is disclosed for scientifically measuring a crucial indicator of radar functionality—elevation scanning range. The specific process includes: firstly, a small unmanned aerial vehicle (UAV) and a medium-sized vehicle are required; the small UAV needs to have real-time, high-precision trajectory measurement capabilities, and the medium-sized vehicle needs to be equipped with an angle reflector; a high-precision positioning device with timestamps is placed at both the radar location and on the medium-sized vehicle, and the radar system is configured with a time synchronization device that can synchronize with the positioning device on the medium-sized vehicle; the small UAV and the medium-sized vehicle are positioned in the same azimuth of the radar, with the small UAV moving radially away from the radar and the medium-sized vehicle moving radially closer to the radar. The radar is activated to detect the small UAV and the medium-sized vehicle, recording the tracking data (with timestamps) of both targets, as well as information such as target detection and loss. Based on the target position information at the time of UAV target detection, the target position information at the time of medium-sized vehicle target loss, and the radar position, the angle formed by the target position information at the time of UAV target detection, the target position information at the time of medium-sized vehicle target loss, and the radar position is calculated. This angle is the radar elevation scanning range. This invention is highly operable and can scientifically and effectively solve the problem of difficulty in testing and verifying radar elevation scanning range.

[0020] A method for testing radar elevation scanning range, the specific technical solution of which is as follows:

[0021] The test conditions are to be carried out under natural conditions that ensure the safe flight of small drones and the safe driving of medium-sized vehicles, and to ensure that the test area for drones and medium-sized vehicles is within the radar line of sight.

[0022] This invention requires a small drone and a medium-sized vehicle. Reflectors must be appropriately mounted on the vehicle; the number, spacing, position, size, and material of the reflectors must all meet specific requirements. The vehicle will be equipped with one reflector; to ensure safe and convenient installation, a lighter reflector with the same capabilities will be selected.

[0023] Positioning equipment should be strategically deployed at the radar location and on the vehicle. The installation location, accuracy, and time synchronization capabilities of the positioning equipment must meet requirements. One positioning device should be installed on each vehicle, positioned as close as possible to the reflector; if this is not possible, the line connecting the positioning device and the reflector should be parallel to the vehicle body. The positioning accuracy must meet requirements, generally less than 0.5 meters, and the time synchronization accuracy should not exceed 40 milliseconds.

[0024] The radar system was equipped with a time synchronization device, and the time synchronization accuracy met the requirements.

[0025] The drone's flight area must meet certain requirements, with a flight range of 0-1000 meters from the radar. The flight angle must meet the full radial requirement. The drone's flight area should be chosen in a cloudless region (with minimal clutter) whenever possible.

[0026] The vehicle's operating area must meet the requirements, with a range of 0-1000 meters from the radar. The navigation angle must meet the full radial requirement. The vehicle should operate in a clean area (with minimal clutter) whenever possible.

[0027] A small drone and a medium-sized vehicle are positioned in the same direction as the radar. The small drone takes off from the radar and moves at a constant speed in a radial direction away from the radar; the medium-sized vehicle is located 1000 meters away from the radar and moves at a constant speed in a radial direction closer to the radar. The radar is activated to detect both ships and records tracking data (with time stamps) and information such as target detection and loss.

[0028] Based on valid data, including real-time storage of radar and vehicle time and position information by high-precision positioning equipment; and real-time storage of tracking data (with timestamps) and target detection and loss information by radar equipment for two targets, the angle formed by the target position information at the time of UAV target detection, the target position information at the time of medium vehicle target loss, and the radar position information is calculated. This angle is the radar elevation scanning range.

[0029] Example

[0030] The technical solution of the present invention will be described in detail below with reference to formulas and accompanying drawings.

[0031] Test conditions

[0032] a) The radar has line-of-sight capability over the movement areas of small unmanned aerial vehicle targets and medium-sized vehicle targets;

[0033] b) The vehicle length shall not be less than 5m and the width shall not be less than 2m;

[0034] c) The time synchronization accuracy of the time synchronization equipment shall not exceed 20ms;

[0035] d) The positioning error of the high-precision positioning equipment does not exceed 0.3m;

[0036] e) The test area for small unmanned aerial vehicle flights and medium-sized vehicle driving meets the safety test conditions.

[0037] Test Procedure

[0038] a) Deploy a small drone A and a medium-sized vehicle B in the same orientation as radar C. The small drone is positioned at the radar's location, and the medium-sized vehicle is positioned 1000 meters away from the radar. A corner reflector is mounted on the medium-sized vehicle.

[0039] b) The radar equipment is equipped with a high-precision time synchronization device, and the time synchronization error between the time synchronization device and the high-precision positioning device on the vehicle does not exceed 20ms;

[0040] c) A small unmanned aerial vehicle A takes off from the radar and rises to 200 meters, moving radially away from the radar at a constant speed of 10 m / s; a medium-sized vehicle B is located 1000 meters away from the radar and moves radially towards the radar at a constant speed of 10 m / s.

[0041] d) The radar equipment emits beams to detect small UAV A and medium-sized vehicle B, and records the tracking data (with time stamps) of the two targets, as well as information such as target detection and loss.

[0042] e) Repeat the experimental steps described in c and d 6 times. Based on the target position information at the time of UAV target discovery, the target position information at the time of medium vehicle target loss, and the radar position information, calculate the angle formed by the target position at the time of UAV target discovery, the target position information at the time of medium vehicle target loss, and the radar position for the 6 times. The maximum value of the 6 angles is the radar elevation scanning range. Fill the results into Table 1.

[0043] f) High-precision positioning equipment stores real-time location information of radar, small UAVs, and medium-sized vehicles. Radar equipment stores real-time tracking data (with timestamps) of small UAVs and medium-sized vehicles, as well as information on the detection and loss of two targets.

[0044] Data processing methods

[0045] The radar elevation scan range is calculated using the following formula:

[0046]

[0047] C(x, y): Radar coordinates

[0048] A(x, y): The coordinates of UAV target A when the radar just detects it.

[0049] B(x, y): The coordinates of vehicle B when the radar just misses the medium-sized vehicle B.

[0050] Radar elevation scan range

[0051] Table 1. Radar Elevation Scan Range Test Record

[0052]

[0053] Note: The minimum value from the 6 test data is taken as the result of the azimuth resolution test.

Claims

1. A radar elevation scan range test method, characterized by, The application relates to a radar target detection method and device. The unmanned aerial vehicle moves away from the radar in a radial direction at a set distance from the radar. The vehicle moves towards the radar in a radial direction at a set distance from the radar. The unmanned aerial vehicle and the vehicle are located in the same quadrant range of the radar. The radar records tracking data of the unmanned aerial vehicle and the vehicle, and determines a radar elevation scanning range according to target position information at a target discovery moment of the unmanned aerial vehicle, target position information at a target loss moment of the vehicle and radar position information.

2. The radar elevation scan range test method of claim 1, wherein, The unmanned aerial vehicle takes off from a set distance above the radar and moves away from the radar in a radial direction at a constant speed.

3. The radar elevation scan range test method of claim 1, wherein, The vehicle moves towards the radar in a radial direction at a constant speed.

4. The radar elevation scan range test method of claim 1, wherein, The vehicle is provided with a reflector.

5. The radar elevation scan range test method of claim 1, wherein, The flight range of the unmanned aerial vehicle is 0-1000 meters away from the radar, and the navigation angle meets the complete radial requirement.

6. The radar elevation scan range test method of claim 1, wherein, Positioning devices are arranged on the radar, the unmanned aerial vehicle and the vehicle, and the time of the positioning devices is unified.

7. The radar elevation scan range test method of claim 1, wherein, The time stamp of the time unification device on the vehicle and the time unification device of the radar are synchronous.

8. The radar elevation scan range test method of claim 1, wherein, The included angle formed by the target position information at the target discovery moment of the unmanned aerial vehicle, the target position information at the target loss moment of the medium-sized vehicle and the radar position is the radar elevation scanning range.

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