Title:
LASER DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/147859
Kind Code:
A1
Abstract:
Provided is a laser device having: a transmission antenna for emitting a transmission signal for the purpose of detecting an obstacle; and a reception antenna for receiving, in the form of a reception signal, reflected waves reflected from an obstacle, wherein a beat signal representing the frequency difference of the transmission signal and the reception signal is generated; the presence or absence of an obstacle is detected on the basis of the result of frequency analysis of the beat signal; when an obstacle is detected, the relative speed and relative distance of the obstacle in relation to the laser device are calculated on the basis of the result of frequency analysis of the beat signal; the relative speed and relative distance of the obstacle in relation to the laser device at the time of the next measurement are estimated; and on the basis of the estimated relative speed and relative distance, the transmission signal is controlled in such a way as to eliminate the beat signal of a large obstacle at the time of the next measurement.
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Inventors:
SAWA YOSHITSUGU (JP)
ARAKI HIROSHI (JP)
INOMATA KENJI (JP)
ARAKI HIROSHI (JP)
INOMATA KENJI (JP)
Application Number:
PCT/JP2013/073033
Publication Date:
September 25, 2014
Filing Date:
August 28, 2013
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01S13/60; G01S13/34; G01S13/931; G08G1/16
Foreign References:
| JP2009210337A | 2009-09-17 | |||
| JPS5618772A | 1981-02-21 | |||
| JP2012173152A | 2012-09-10 | |||
| JP2006266907A | 2006-10-05 | |||
| JPH1164502A | 1999-03-05 | |||
| JPH05232214A | 1993-09-07 |
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
Mutsumi Sameshima (JP)
Mutsumi Sameshima (JP)
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