Method and device for monitoring flight speeds of air vehicle and environmental parameters thereof

• Main Authors: TAO JUNZHONG, YANG CHUANYIN, WU TAO, SHANG JINGCHENG, WANG HAO, HE XINGDAO
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2019
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TARIFF METERING APPARATUS; TESTING

The invention discloses a method and a device for monitoring flight speeds of an air vehicle and environmental parameters thereof. The emitted laser of a single-longitudinal mode narrowband laser interacts with the air to generate Rayleigh-Brillouin scattering, a Rayleigh-Brillouin scattering spectral line is measured by using a heterodyne method of a multi-longitudinal mode laser with a wide radiation line width, the atmospheric molecular density and the temperature information of the environment where the air vehicle is located are obtained by combining the gas scattering theory with a model, meanwhile different flight speeds of the air vehicle are measured according to the Doppler effect, and finally, multiple parameters are simultaneously measured accurately. The method and the devicedisclosed by the invention have the advantages of simultaneously and accurately monitoring multiple parameters from ow speed to high speed and from low altitude to high altitude in real time in all weathers, high sensitivity