Systems and methods for sensing and tracking radiation blocking objects on a surface
US9453726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2013 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Aug 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various system and methods for estimating the position of one or more radiation blocking objects on a surface are disclosed. A plurality of radiation sources and radiation sensors are positioned about the surface. A plurality of sectors corresponding to the position of at least some of the radiation blocking objects relative to each of the radiation sensors is determined based on a radiation intensity signal for each radiation sensor. The position of the radiation blocking objects is estimated by analyzing various combinations of the sectors. In some embodiments, the size of a radiation blocking object may be estimated based on characteristics of a polygon corresponding to a combination of sectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.