Presence detector and its application
US6486778B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2000 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Dec 13, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/19697
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The presence detector has a passive infrared sensor for detecting the presence of persons in a room, an image sensor operating in the visible spectral range and an electronic evaluator for the evaluation of signals from these sensors. The signal from the passive infrared sensor is used to actuate the image sensor and, if necessary, to switch on the room lighting. Once activated, the image sensor is used to detect both movement and occupancy of a space being monitored. Application of the presence detector for the “on-demand” activation and/or control of conditioning facilities of a room, wherein the signals of both sensors are used for the control of the conditioning facility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.