Title:
RANGE FINDER AND RANGE FINDING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/189275
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a range finder and a range finding method that enable highly accurate measurement of a distance to an object even when a window function is used. A range finder 1 comprises: a first acquisition unit 191 for acquiring a time tr,i for each of peaks pr,i included in a second reference signal r2, which is obtained through photoelectric conversion of periodically intensity-modulated light from a light source 100; a second acquisition unit 192 for acquiring a peak ps,i existing in a range of ±Tsource/2 centered at the time tr,i from a second detection signal s2, which is obtained through photoelectric conversion of the light emitted by the light source 100 and reflected by an object 104; and a distance calculation unit 194 for calculating a distance to the object 104 on the basis of the cross-correlation between a signal rw2, which is obtained by processing the second reference signal r2 by matching the peak of a window function with the peak pr,i, and a signal sw2, which is obtained by processing the second detection signal s2 by matching the peak of the window function with the peak ps,i.
Inventors:
UENO MASAHIRO (JP)
AKAGE YUICHI (JP)
OKA SOICHI (JP)
AKAGE YUICHI (JP)
OKA SOICHI (JP)
Application Number:
PCT/JP2020/009103
Publication Date:
September 24, 2020
Filing Date:
March 04, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01S17/36; G01C3/06; G01S7/481
Foreign References:
| JPH1020036A | 1998-01-23 | |||
| JPH06186337A | 1994-07-08 | |||
| US20180017672A1 | 2018-01-18 | |||
| JPH1123215A | 1999-01-29 |
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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