3 Method For measuring 3 Dimensional Wind Direction/Wind Velocity Using Lidar System having Optical Fiber Receiving Optical Meter

摘要

PURPOSE: A method is provided to measure a direction of wind and a wind velocity exactly and quickly, by successively acquiring a lidar signal, parsing the lidar signals of different spaces in time, and calculating an aerosol movement. CONSTITUTION: A beam energy is oscillated from a pulse-type laser apparatus(A). The oscillated beam energy is divided into individual light sources as they sequentially passes through the first and second beam splitters(B). The individually divided beam energy is emitted into the atmosphere through the first and second beam splitters and a reflecting mirror(C). The individual beam sources are scattered by collision with an aerosol or an air molecule and are irradiated on a large diameter telescope. The first to third optical fibers placed at focus surfaces of the telescope receive lidar signals of corresponding states, respectively(D). The lidar signals thus received pass through collimation lens, a filter, a condensing lens, so that a background signal existing in the atmosphere(E). Each analog lidar signal is converted into a corresponding digital signal(F), and a direction of wind and a wind velocity are calculated using the digital lidar signals(G).