Infrared human detector not barred by an intervening obstruction
US5489892A · kind A · utility
12Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Dec 6, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An intruder detection system for senses infrared radiated by an intruder through a window-pane and detecting the intrusion through the reception of an output from the infrared sensors. The system includes a light emitter for projecting infrared rays toward a detection area and a light acceptor for receiving at least part of the infrared rays projected by the light emitter through an obstruction detection optical path. The light emitter and the light acceptor are located on opposite sides of the window-pane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.