Sensor for presence detection
US8077034B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2006 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Nov 29, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/196
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention refers to a sensor (10) for presence detection, and a method for presence detection, in a detection area (18) comprising at least an image generator (14) for generating an image on a detection area (18) formed by illuminated structures reflecting from said detection area (18), a detector (20) for detecting signals of the image reflected from the detection area (18), an image processing unit (24) for comparing the signals based on the reflected and received image with signals of a reference image stored in storing means of the image processing unit (24), wherein the image generator (14) generates a pattern (16) on the detection area (18) having illuminated and non-illuminated zones, the image processing unit (24) uses triangulation technique to detect changes of the pattern (16) within the detection area (18) over the reference image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.