Laser wind-finding radar optical antenna focal length self-adaptive adjustment method

An adaptive adjustment and wind-measuring radar technology, applied in ICT adaptation, measurement devices, re-radiation of electromagnetic waves, etc., can solve problems such as differences in detection performance and reduced detection capabilities

Inactive Publication Date: 2016-09-07
SOUTH WEST INST OF TECHN PHYSICS
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  • Abstract
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AI Technical Summary

Problems solved by technology

The detection performance of the laser wind radar based on the fixed focal length optical antenna is significantly different under variable atmospheric conditions. Wind radar has certain limitations in use

Method used

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  • Laser wind-finding radar optical antenna focal length self-adaptive adjustment method
  • Laser wind-finding radar optical antenna focal length self-adaptive adjustment method

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Embodiment Construction

[0012] refer to figure 1 . In a preferred embodiment described below, the wind measuring radar is a pulse fiber laser wind measuring radar, and the optical antenna focal length adaptive adjustment of the pulse fiber laser wind measuring radar is mainly through the central control computer 1, the motor The driver 2 and the focusing motor 3 , as well as the secondary mirror 41 arranged in the optical antenna 4 and connected to the focusing motor 3 , and the primary mirror 42 distributed on the same optical axis as the secondary mirror 41 are implemented in cooperation. Wherein, the optical antenna 4 is an optical focusing antenna with a common aperture structure for transmitting and receiving. The mirror 41 is connected to the focusing motor through a mechanical structure, and can be driven by the focusing motor to move within a certain range along the axis of the antenna. The central control computer 1 is connected to the motor driver 2, and the motor driver 2 communicates wi...

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Abstract

The invention discloses a laser wind-finding radar optical antenna focal length self-adaptive adjustment method. With application of the method, the radar detection range is enabled to have certain self-adaptability for the change of atmospheric visibility. The method is realized through the following technical scheme that radar control software and an echo distance door set value are set in a central control computer (1), and the radar control software compares the statistical number of echo signal-to-noise ratio standard distance doors with the set value so as to judge whether the statistical number of signal-to-noise ratio standard distance doors exceeds the set value; when the central control computer analyzes that the number of wind field measurement signal-to-noise ratio standard distance doors is lower than the set value, wind-finding radar optical antenna focal length is automatically adjusted, a focusing motor is controlled to slowly move an antenna secondary lens along the axis of an optical focusing antenna and the equivalent focal length of the optical focusing antenna is changed; meanwhile, the central control computer determines the focusing direction according to the currently measured change trend of the number of signal-to-noise ratio standard distance doors through focusing, updates the initial position of the focusing motor and searches the optimal focal length.

Description

technical field [0001] The invention relates to an adaptive adjustment method for the focal length of an optical antenna of a wind-measuring radar, in particular to an adaptive adjustment method for an optical antenna focal length of a pulse fiber laser wind-measuring radar. Background technique [0002] The pulsed fiber laser wind measurement radar uses the Doppler frequency shift effect of the laser scattering echo on the tiny aerosol particles drifting with the wind in the atmosphere to measure the atmospheric wind field. Wind radar detection capabilities (detection distance, signal-to-noise ratio, etc.) have adverse effects. Judging from the research and development status at home and abroad, pulsed laser wind radars mostly use optical antennas with fixed focal lengths to transmit and receive laser light. , is also closely related to the focus position of the radar optical antenna. The detection performance of the laser wind radar based on the fixed focal length optica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 赵彬冯力天罗雄陶刚樊冬汤磊杨泽后周鼎富
Owner SOUTH WEST INST OF TECHN PHYSICS
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