Thermally sensitive array device for presence detection around automatic doors
US7362224B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 2005 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Jan 15, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a thermally sensitive array device for detecting a presence of a target object in a surveillance area. The device comprises a plurality of at least two thermally sensitive sensors provided in an array arrangement, each thermally sensitive sensor being associated with one of a corresponding plurality of at least two surveillance spots comprised in the surveillance area. Each thermally sensitive sensor comprises a sensitive element adapted to absorb a portion of thermal infrared radiation emitted from one of said plurality of targets located inside the surveillance cone corresponding to the thermally sensitive sensor. The thermally sensitive sensor can be a thermopile, a bolometer, or any other type. Electronic circuits in each thermally sensitive sensor are adapted to measure a signal generated in the thermally sensitive sensor as a consequence of the temperatures of the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.