公开(公告)号：EP3783391A1

公开(公告)日：2021-02-24

申请号：EP18942353.6

申请日：2018-12-03

申请人： Nanjing Movelaser Technology Co., Ltd.

发明人： ZHOU, Jun ,  XIAO, Zengli ,  ZHU, Hailong ,  TANG, Anqing

IPC分类号： G01S17/95 ,  G01S17/32

摘要： A wind field information measurement method and a nacelle-based lidar, relating to the field of wind power generation. The method comprises: sending, by a multi-wavelength laser (110), light signals having at least two different wavelengths; splitting, by a beam splitter (120), the light signals into at least a first light signal and a second light signal; transmitting, by a frequency modulator (130), a first light pulse signal obtained after frequency modulation on the first light signal and a second light pulse signal obtained after frequency modulation on the second light signal; acquiring, by a signal processing device (140), a return light signal formed in a manner of combining, by a beam combiner (150), a first return light signal returned after the first light pulse signal is scattered by aerosols in the atmosphere and a second return light signal returned after the second light pulse signal is scattered by aerosols in the atmosphere; and obtaining, by the signal processing device (140), wind field information on the basis of the return light signal. By measuring the wind field information by simultaneously transmitting at least two light signals having different wavelengths, the accuracy of the measurement is improved.