Title:
SPEED MEASUREMENT DEVICE AND SPEED MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2023/228493
Kind Code:
A1
Abstract:
This speed measurement device is provided with: a splitter 20 for splitting light reflected from a moving measurement object 10 into a first light and a second light; an object-side telecentric lens or a both-side telecentric lens 4 for receiving reflected light; a comparison unit 301 for comparing amplitude of a first signal obtained by performing spatial filtering of the first light at a first distance L from the splitter 20, with amplitude of a second signal obtained by performing spatial filtering of the second light at a second distance L+D from the splitter 20; and a moving speed calculation unit 302 for calculating the moving speed of the measurement object 10 on the basis of the first signal or the second signal, whichever has a larger amplitude.
Inventors:
FURUYA MASASHI (JP)
Application Number:
PCT/JP2023/006056
Publication Date:
November 30, 2023
Filing Date:
February 20, 2023
Export Citation:
Assignee:
AZBIL CORP (JP)
International Classes:
G01P3/36
Domestic Patent References:
| WO2015068301A1 | 2015-05-14 |
Foreign References:
| JPH0432768A | 1992-02-04 | |||
| JPH02263164A | 1990-10-25 | |||
| JPH01202667A | 1989-08-15 | |||
| CN106093454A | 2016-11-09 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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