Wind measuring device and wind measuring method based on laser Doppler combined flicker

• Main Authors: HE GUANGYUAN, JIANG ZAIXIN, REN YONGXUE, GUO WEIZHEN
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2022
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention relates to a wind measuring device and a wind measuring method based on laser Doppler combined flicker. The device comprises a fiber laser, a beam splitter, an optical signal modulation module, a circulator, a coupler, a balance detector and an optical antenna. A first echo signal which is generated by aerosol particles, air molecules or atmospheric turbulence naturally appearing in the atmosphere and has Doppler frequency shift and back scattering is measured, a second echo signal which is reflected after light intensity fluctuates and changes is measured through an optical lens and a multi-quadrant detector, and a signal processing unit receives related signals and sends the related signals to a signal processing unit. Radial wind speed is obtained by analyzing the relation between Doppler frequency shift and object radial movement speed, transverse wind speed is obtained by analyzing the time correlation that light intensity generates the same fluctuation trend, complete real wind speed infor