Multi-frequency pulse laser radar signal processing method and wind finding radar system

A radar signal processing and pulsed laser technology, applied in radio wave measurement systems, measurement devices, electromagnetic wave re-radiation and other directions, can solve the problems of difficulty in speed resolution and distance resolution

Active Publication Date: 2021-08-13
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] Based on this, it is necessary to address the above technical problems and provide a multi-frequency pulse laser radar signal processing method and wind radar system that can solve the dilemma of speed resolution and distance resolution in traditional single-frequency laser radar.

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  • Multi-frequency pulse laser radar signal processing method and wind finding radar system
  • Multi-frequency pulse laser radar signal processing method and wind finding radar system
  • Multi-frequency pulse laser radar signal processing method and wind finding radar system

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Embodiment Construction

[0043] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0044]The application provides a multi-frequency pulse laser radar signal processing method, the method is applied to the wind radar system, the wind radar system includes a multi-frequency continuous laser generator, a first optical fiber beam splitter, a pulse modulator, a radio frequency drive Source, circulator, optical transceiver, continuously adjustable attenuator, second optical fiber beam splitter, balanced detector, analog-to-digital conversion acquisition card, digital signal processing system,

[0045] Multi-frequency laser signals with high coherence at each f...

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Abstract

The invention relates to a multi-frequency pulse laser radar signal processing method and a wind finding radar system. The method comprises the following steps: detecting a target by emitting a plurality of laser pulse signals with coherent frequencies, correspondingly receiving a plurality of multi-frequency echo signals reflected by the target at different distances, and processing the multi-frequency echo signals by adopting a microwave signal processing mode to obtain the moving speed of the target. By adopting the method, the problem that speed/distance resolution of a traditional single-frequency laser radar is dilemma can be solved, that is, distance resolution can be reduced when speed resolution of the traditional laser radar is improved, and speed resolution can be reduced when distance resolution is improved, so that fine detection of a complex wind field is realized under a lower signal-to-noise ratio; moreover, the frequency difference among the multi-frequency signals is adjusted to adapt to various detection conditions.

Description

technical field [0001] The present application relates to the technical field of lidar wind measurement, in particular to a multi-frequency pulse laser radar signal processing method and a wind measurement radar system. Background technique [0002] The complex wind field refers to the wind field that changes violently in time and space, including small and medium-scale airflow fields such as wind shear and aircraft disturbance field. The cross-research direction of detection has important application requirements in military and civil aviation safety, environmental monitoring, important weapon launch guarantee, and anti-stealth. Lidar uses laser as the information-carrying medium. Due to the advantages of high monochromaticity, high coherence, high directionality and non-contact of laser, it is widely used in wind field measurement and other fields. It has good detection ability under clear sky conditions. The main principle is that the Doppler frequency shift will occur a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95G01S7/484G01S7/486
CPCG01S7/484G01S7/486G01S17/95Y02A90/10
Inventor 李健兵徐荷王雪松
Owner NAT UNIV OF DEFENSE TECH
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