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)
KAJIYAMA YUTAKA (JP)
Application Number:
PCT/JP2018/015943
Publication Date:
October 24, 2019
Filing Date:
April 18, 2018
Export Citation:
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:
See also references of EP 3767339A4
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
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