Title:
RANGEFINDER AND RANGEFINDING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/170796
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a rangefinding technique with which it is possible to highly precisely measure the distance to an object even when a timing difference between ADC channels fluctuates each time a signal is acquired. This rangefinder 1 comprises: an optical system having a correction mirror 105 disposed on an object 104 side, and a PDs 107 for detecting reflection light obtained when light that has been outputted from a light source 100 and that periodically undergoes intensity modulation is reflected by each of the object 104 and the correction mirror 105; and a signal processing device 109 having a rangefinding unit 110 that outputs a distance signal Ln indicating the distance to the object 104 on the basis of the time elapsed until the reflection light is detected by the PDs 107, a correction mirror rangefinding unit 111 that outputs a distance signal Lcor indicating the distance to the correction mirror 105, and a distance correction unit 112 that corrects the distance signal Ln on the basis of the distance signal Lcor and outputs a distance signal Ln, cor indicating the distance to the object 104.
Inventors:
UENO MASAHIRO (JP)
AKAGE YUICHI (JP)
OKA SOICHI (JP)
AKAGE YUICHI (JP)
OKA SOICHI (JP)
Application Number:
PCT/JP2020/004041
Publication Date:
August 27, 2020
Filing Date:
February 04, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01S7/497; G01C3/06; G01S7/481
Foreign References:
| JP2015175629A | 2015-10-05 | |||
| JP2015152485A | 2015-08-24 | |||
| JP2016170053A | 2016-09-23 | |||
| JP2018059789A | 2018-04-12 | |||
| JPH05297112A | 1993-11-12 | |||
| US20180040119A1 | 2018-02-08 |
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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