Three-wavelength real-time calibration lidar device

Abstract

The invention discloses a three-wavelength real-time scaling laser radar device, which comprises a receiving system, a computer and an emitting system, wherein the receiving system consists of a telescope, a beam splitter, a wave filter and two photoelectric detectors; the computer is connected with the two photoelectric detectors through a data acquiring system; the emitting system is used for emitting laser beams to the atmospheric air and comprises a light switch for selecting a seed laser a, a seed laser b and a seed laser c and injecting laser light into a pulse laser; the pulse laser is used for emitting laser light to the atmospheric air through a beam expanding lens and a reflecting mirror; or the emitting system comprises an acousto-optic frequency shifter for changing the emergent light of the seed laser and injecting the emergent light into the pulse laser through a beam combiner; the pulse laser is used for emitting laser light to the atmospheric air through the beam expanding lens and the reflecting mirror; and the light switch and the acousto-optic frequency shifter are controlled by the computer. Due to the adoption of the laser radar device, sensitivity needed by wind measurement and the measuring information of two wind measuring wavelengths can be provided in real time, wind measuring performance is improved, and accurate movable measurement is realized.

Description

technical field [0001] The invention relates to a radar device for laser measuring atmospheric wind field, in particular to a three-wavelength real-time calibration laser radar device. Background technique [0002] Atmospheric wind field is an important observation parameter in meteorological detection, and plays an important role in many fields such as weather, environment, transportation, aviation, and ocean. The basic information of the wind field is provided in the weather forecast, which is helpful for the forecast of weather changes; the gusts and wind shear in aviation are more harmful, and the observation of the wind field can help to prepare for the response in advance; Determination of the wind field to make the fan operate effectively, etc. [0003] Most of the existing wind measurement methods are wind vane wind measurement and microwave radar wind measurement. The measurement of the wind vane can only measure the local wind speed near the ground, which is rela...

AI Technical Summary

Problems solved by technology

In this way, measurement sensitivity and wind measurement cannot be carried out simultaneously

And because the aerosol changes from time to time, it will inevitably cause deviation; and in the mobile measurement, because of the time change of the position, it becomes meaningless to measure the sensitivity in advance

[0006] Therefore, although lidar wind measurement technology has entered the stage of commercialization, it is still unable to obtain accurate relative aerosol concentration information in real time, and cannot calibrate the measurement sensitivity in real time to enter real practical use.

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