Position measurement system for movable body
US11086020B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2018 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | May 8, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A position measurement system includes a movable body and at least one indicator including identification information. The movable body includes an optical sensor configured to acquire an image of the indicator, an information acquisition unit configured to acquire the identification information of the indicator and a bearing of the indicator as seen from the movable body based on the image of the indicator acquired by the optical sensor, a coordinate acquisition unit configured to acquire coordinates of the indicator based on the acquired identification information of the indicator, and a position calculation unit configured to calculate a position of the movable body based on the acquired bearing of the indicator and the acquired coordinates of the indicator. The indicator includes, as the identification information, at least one of a unique reflection spectrum, a spectrum change pattern, a hue change pattern, a brightness change pattern, or a temperature change pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.