Fire detection method and apparatus using overlapping spectral bands
US5995008A · kind A · utility
22Cited by
23References
69Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | May 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An optical fire detector employs two or more sensors operating a different spectral bands. The spectral bands are selected to have approximately coincident cut-off wavelengths in order to make the detector's ability to positively identify a fire more uniform over its field of view. The use of three overlapping spectral bands provides the detector with enhanced detection capabilities for large, hot fires that behave like black body radiators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.