LASER RADAR DEVICE AND FREQUENCY MODULATION CONTROL METHOD

Title:

LASER RADAR DEVICE AND FREQUENCY MODULATION CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2018/235160

Kind Code:

A1

Abstract:

This laser radar device (1) comprises: a modulated light generation unit (10, 11) for generating modulated laser light that has been subjected to frequency modulation on the basis of a control parameter; an optical multiplexer (15) for generating interference light by multiplexing received light and local light; a photodetector (20) for detecting the interference light and outputting an electrical signal; a frequency-to-voltage converter (31) for converting the electrical signal into a voltage signal; a characteristic calculation unit (32) for measuring a characteristic value of the voltage signal; a determination unit (33) for determining, on the basis of the characteristic value, whether the center frequency of the spectrum of a reflection signal component is within the demodulation band of a demodulation circuit (21); and a parameter setting unit (34) for changing the control parameter if a determination is made that the center frequency is outside of the demodulation band.

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Inventors:

NISHINO YUICHI (JP)
IMAKI MASAHARU (JP)
KAMEYAMA SHUMPEI (JP)

Application Number:

PCT/JP2017/022684

Publication Date:

December 27, 2018

Filing Date:

June 20, 2017

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

G01S17/34; G01S7/4911; G01S7/4915; G01S17/32

Foreign References:

JP2001041706A	2001-02-16
US20040130482A1	2004-07-08
JPH0755925A	1995-03-03
JPH09211128A	1997-08-15
JP2015125062A	2015-07-06
JP2002162465A	2002-06-07
JP2005009956A	2005-01-13
US20130044311A1	2013-02-21
JP2008039640A	2008-02-21

Other References: