COHERENT LIDAR DEVICE - MITSUBISHI ELECTRIC CORP

Title:

COHERENT LIDAR DEVICE

Document Type and Number:

WIPO Patent Application WO/2017/130315

Kind Code:

A1

Abstract:

This coherent lidar device is provided with: a fast Fourier analysis unit (1301) which performs a fast Fourier transform of a reception signal at each time gate to obtain a reception spectrum for each time gate; a signal integration discrimination unit (1302) which, for each time gate, determines the necessity of integration of the reception spectrum obtained from the fast Fourier analysis unit (1301); a spectrum integration unit (1304) which, in accordance with the determination result by the signal integration determination unit (1302), integrates the reception spectrum obtained by the fast Fourier analysis unit (1303); a frequency shift calculation unit (1306) which, from the reception spectrum integrated by the spectrum integration unit (1304), calculates the amount of frequency shift with respect to a laser beam irradiated by an optical transceiver (11); and a windspeed calculation unit (1307) which, from the frequency shift amount calculated by the frequency shift calculation unit (1306), calculates the windspeed in the direction of irradiation of the laser beam by the optical transceiver (11).

Inventors:

IMAKI MASAHARU (JP)
KOTAKE NOBUKI (JP)
KAMEYAMA SHUMPEI (JP)

Application Number:

PCT/JP2016/052297

Publication Date:

August 03, 2017

Filing Date:

January 27, 2016

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

G01S17/58; G01P5/26; G01S7/486; G01S17/95

Domestic Patent References:

WO2015052839A1

2015-04-16

Foreign References:

JP2014035276A	2014-02-24
JP2004285858A	2004-10-14
JP2014081331A	2014-05-08
JP2005009956A	2005-01-13

Other References: