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Linear frequency modulation radar ranging system and method based on distance

A technology of radar ranging and linear frequency modulation, which is applied in the direction of radio wave measurement system, measurement device, radio wave reflection/reradiation, etc., to achieve fast measurement speed, reduce intermodulation distortion, and reduce difficulty

Pending Publication Date: 2022-02-08
ZHONGDA TESTING (HUNAN) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing ranging methods based on linear frequency modulation continuous wave radar are to directly calculate and measure after receiving the echo signal, and do not calculate the distance according to the situation according to the distance

Method used

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  • Linear frequency modulation radar ranging system and method based on distance
  • Linear frequency modulation radar ranging system and method based on distance
  • Linear frequency modulation radar ranging system and method based on distance

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] A chirp radar ranging system based on distance, including a radar transmitter, antenna, receiver, signal processing module and display;

[0030] The radar transmitter is used to generate electromagnetic energy, which is transmitted to the antenna through the isolator; the antenna radiates the electromagnetic energy into the atmosphere, concentrates it in a narrow direction to form a beam, and emits electromagnetic waves outward;

[0031] When the electr...

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Abstract

The invention belongs to the technical field of linear frequency modulation continuous wave radar ranging, and particularly relates to a linear frequency modulation radar ranging system and method based on distance. The system comprises a radar transmitter, an antenna, a receiver, a signal processing module, and a display. The receiver performs orthogonal demodulation on a received target echo signal and a transmitted signal to obtain a difference frequency signal, the difference frequency signal enters the signal processing module after being sampled, and distance measurement is realized through spectral analysis and processing. For a radar receiving system with the requirement for detecting far and near targets, the invention provides a segmented distance measurement scheme, which is beneficial to implementation on hardware, reduces intermodulation distortion of an amplifier and reduces the difficulty of signal processing. A common segmented distance measurement method is improved, multi-segment measurement is completed at a time, and the measurement speed is higher.

Description

technical field [0001] The invention belongs to the technical field of linear frequency modulation continuous wave radar ranging, and in particular relates to a distance-based linear frequency modulation radar ranging system and method. Background technique [0002] The chirp continuous wave radar measures distance by frequency modulation. Measure the target distance by accurately estimating the difference frequency point between the transmitted signal and the received signal. Compared with pulse radar, the transmitter of continuous wave radar does not need very high voltage, and the receiver bandwidth is narrower than that of pulse radar receiver, which is beneficial to anti-clutter. The pulse radar transmits and receives a common antenna, and cannot receive the signal when transmitting the signal, resulting in a distance blind zone, while the continuous wave radar transmitter and receiver can work at the same time, there is no distance blind zone, and is suitable for shor...

Claims

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Application Information

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IPC IPC(8): G01S13/34G01S7/35
CPCG01S13/341G01S7/354
Inventor 李春苗尹小波罗治郭棋武湛永坚曹毅强孔德君王峰毕晓猛雷彬
Owner ZHONGDA TESTING (HUNAN) CO LTD
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