LASER RADAR DEVICE - MITSUBISHI ELECTRIC CORP

Title:

LASER RADAR DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/202676

Kind Code:

A1

Abstract:

In a conventional laser radar device, distance resolution is changed in advance in accordance with a measurement distance, resulting in the problem that re-measurement is necessary after the distance resolution has been changed. The laser radar device of the present invention is provided with: an optical oscillator which causes laser light to oscillate; an optical modulator which modulates the laser light that has been caused to oscillate by the optical oscillator; an optical antenna which radiates the laser light that has been modulated by the optical modulator into the atmosphere, and receives scattered light from an irradiated object as received light; an optical receiver which subjects the received light received by the optical antenna to heterodyne detection; and a signal processor which calculates, for each range bin, a spectrum of a received signal obtained by the heterodyne detection performed by the optical receiver, calculates a signal-to-noise ratio for the range bin, and if the signal-to-noise ratio is equal to or less than a threshold, integrates the spectrum of the range bin with the spectra of one or more range bins adjacent to said range bin.

Inventors:

KOTAKE NOBUKI (JP)
KAJIYAMA YUTAKA (JP)

Application Number:

PCT/JP2018/015943

Publication Date:

October 24, 2019

Filing Date:

April 18, 2018

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

G01S17/95

Domestic Patent References:

WO2017175297A1	2017-10-12
WO2011158359A1	2011-12-22

Foreign References:

US7557735B1	2009-07-07
JP2014066548A	2014-04-17
JP2009300133A	2009-12-24

Other References: