Patent ID: 11906545
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  F  Y | IPC F  G

Claim 8:
9. A wind measurement method of a laser radar device for transmitting laser light ahead of a wind turbine and receiving scattered light of the laser light scattered at a transmission destination, the laser radar device being installed in a spinner portion of the wind turbine, the wind measurement method comprising:
determining a divided section in which a laser beam of the laser light is present among a plurality of divided sections obtained by dividing a trajectory drawn by the laser beam in front of the wind turbine;
per each divided section in which the laser beam is determined to be present, analyzing reception signals of the scattered light to calculate reception spectra for each distance in a line-of-sight direction of the laser beam, and integrating the calculated reception spectra;
storing a reception spectrum calculated for each divided section; and
calculating a wind speed for each divided section using the reception spectrum for each divided section, wherein
the trajectory drawn by the laser beam in front of the wind turbine is divided by the number of divisions for each distance in a line-of-sight direction of the laser beam, and the number of divisions of the trajectory is made smaller in a case where the distance in the line-of-sight direction of the laser beam is short than in a case where the distance is long.