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Experimental method for radar target angle measurement

A technology of target angle and experimental method, which is applied in the field of radar target measurement, can solve problems such as large error, low reliability, and cumbersome process, and achieve the effect of reducing angle measurement error and ensuring accuracy

Pending Publication Date: 2021-04-23
SHANGHAI AEROSPACE ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of cumbersome process, large error and low reliability of current radar measuring target angle, an experimental method for radar measuring target angle is proposed

Method used

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  • Experimental method for radar target angle measurement
  • Experimental method for radar target angle measurement
  • Experimental method for radar target angle measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: Stationary target.

[0044] combined with Figure 1 to Figure 2 To specifically describe this embodiment:

[0045]Step 1. Build an experimental system for radar to measure target angle. First set up the radar, determine the central axis of the measurement system, take H=5 meters, and determine the offset L of different angles (±9°, ±7°, ±5°, ±3°) according to the relational expression L=H tanθ , connect the radar projection on the ground and the offset point, and draw a marker line, see figure 1 .

[0046] Step 2. Radar antenna pointing calibration. Place the calibration body on the central axis of the angle measurement system, constantly adjust the antenna pointing and measure the angle of the calibration body, so that the angle of the calibration body is smaller than the threshold δ (δ = 1°), and the angle of the calibration body is recorded as θ T .

[0047] Step 3, place the target on the marking line of multiple angles (±9°, ±7°, ±5°, ±3°) withi...

Embodiment 2

[0049] Embodiment 2: sports target.

Embodiment approach

[0051] Step 1. Set up the radar, determine the main axis, select the first line near the main axis, that is, the central axis, and draw marking lines at different angles (-6°, ±3°) on the ground.

[0052] Step 2. Radar antenna pointing calibration. If the test environment or test conditions have not changed, there is no need to recalibrate the radar antenna pointing. Set the threshold δ=1°.

[0053] Step 3. Place the target on the marking line at a certain angle (-6°, -3°, +3°) within the range of the radar beam, and reciprocate the motion platform along the marking line, and use the radar to measure the angle of the target. The schematic diagram of the test is shown in 3.

[0054] Step 4. Subtract the antenna main axis pointing angle θ from a set of angle data measured for each angle T , and then averaged, and then subtracted from the actual angle to obtain the angle measurement error. Measurement results such as Figure 4 shown.

[0055] We counted the test results of ...

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Abstract

The embodiment of the invention provides an experimental method for measuring a target angle by a radar, which is characterized by comprising the following steps of: 1, erecting the radar, selecting a first line passing through the radar, namely a central axis, and then selecting two marking lines on two sides of the central axis according to a selected included angle and the included angle, wherein the marking lines are used for marking a moving track of a target; 2, performing radar antenna pointing calibration; 3, placing a target on the marking lines, and measuring the angles of the target through the radar; and 4, processing the angle data measured on each angle marking line to obtain a target angle. The measured target angles are averaged, then a antenna main shaft pointing angle is subtracted, and the result is recorded as the final target angle.

Description

technical field [0001] The invention belongs to the field of radar target measurement and relates to an experimental method for radar target angle measurement. Background technique [0002] The signal generated by the radar transmitter is radiated outward through the transmitting antenna, and the signal is reflected or scattered after encountering the target. The receiving antenna of the radar sends the received reflected signal (echo signal) to the radar receiver to complete frequency conversion, filtering, amplification, etc. processing to form an intermediate frequency signal. The intermediate frequency signal is sampled and digitally processed in the signal processor to complete the measurement of the target parameters. Radar can measure the range and velocity of a target, and if it has multiple receive antennas or if the antenna beam is steerable, it can also measure the angle of the target. There are different systems of radars for different application scenarios. Co...

Claims

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Application Information

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IPC IPC(8): G01S13/42G01S13/58G01S13/08G01S7/40
CPCG01S13/42G01S13/58G01S13/08G01S7/40
Inventor 颜卫忠陈栋志孔凡伟钱婧怡白旭东
Owner SHANGHAI AEROSPACE ELECTRONICS CO LTD
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