公开(公告)号：EP4283338A1

公开(公告)日：2023-11-29

申请号：EP21927863.7

申请日：2021-02-26

申请人： MITSUBISHI ELECTRIC CORPORATION

发明人： NOMURA, Junia ,  IMAKI, Masaharu ,  KAMEYAMA, Shumpei ,  ITO, Yusuke

IPC分类号： G01S17/58

摘要： A signal processing device (15) is configured to calculate, as a moving speed of each of a plurality of observation targets present in a space, a relative speed of each of the observation targets with respect to a lidar device. A plurality of light pulses having different optical frequencies from each other are generated from a laser beam output from a light source (1), each of the light pulses radiated to the space and then scattered by each of the observation targets is received as scattered light, and multiplexed light of each of the scattered light and the laser beam is detected. The signal processing device (15) includes: a Doppler frequency calculating unit (16) to calculate a Doppler frequency that is included in an optical frequency of each of the scattered light and due to movement of each of the observation targets from the optical frequencies of the plurality of generated light pulses and a detection signal of each of the multiplexed light; and a speed calculating unit (17) to calculate a relative speed of each of the observation targets from each of the Doppler frequency calculated by the Doppler frequency calculating unit (16).