Dual spectrum infrared fire sensor
US4296324A · kind A · utility
26Cited by
12References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1979 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Nov 2, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a fire and explosion detection system wherein long wavelength radiant energy responsive signals are processed in one channel and compared to short wavelength radiant energy responsive signals which are processed in a second channel. At least one of the channels is responsive to a wavelength where at least one of the combustion products of the fire or explosion exhibits a strong absorption band in the atmosphere. When the signals from the two channels are coincident in response to a fire or explosion of a predetermined threshold magnitude, an output fire suppression signal is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.