Title:
DISTANCE MEASUREMENT DEVICE, DISTANCE MEASUREMENT METHOD, AND SHAPE MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/187510
Kind Code:
A1
Abstract:
The present disclosure pertains to a distance measurement device with which it is possible to highly accurately measure the distance to a physical object. The distance measurement device is provided with a light source unit for emitting a plurality of lights of differing wavelengths, a radiant optical element for irradiating a measurement object with the emitted lights, a light-receiving unit for receiving light reflected by the measurement object, and a processor for calculating the distance from a light source to the measurement object on the basis of a signal detected by a light-receiving element. The processor executes a frequency calculation process for calculating, on the basis of the signal detected by the light-receiving unit, peak frequencies that correspond to each of the wavelengths, and also executes, on the basis of the peak frequencies that correspond to each of the wavelengths, a distance calculation process for reducing a Doppler shift error produced due to movement of the measurement object and calculating distance.
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Inventors:
HARIYAMA TATSUO (JP)
WATANABE MASAHIRO (JP)
WATANABE MASAHIRO (JP)
Application Number:
PCT/JP2016/063054
Publication Date:
November 02, 2017
Filing Date:
April 26, 2016
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01B9/02; G01S7/4911; G01S7/4912; G01S17/34
Foreign References:
| JP2008531993A | 2008-08-14 | |||
| JP2012502301A | 2012-01-26 | |||
| JP2008275594A | 2008-11-13 | |||
| JPH10111361A | 1998-04-28 | |||
| JP2014202716A | 2014-10-27 | |||
| JP2000111312A | 2000-04-18 | |||
| JPH09257415A | 1997-10-03 | |||
| JP2002372580A | 2002-12-26 |
Attorney, Agent or Firm:
HIRAKI Yusuke et al. (JP)
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