Fire sensor statistical discriminator
US4665390A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1985 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Aug 22, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Circuitry for using the statistical properties of detected radiation in the time domain to discriminate between stimuli from fire and non-fire sources. Statistical discriminators for fire sensing may be combined with other types of sensors operating in the frequency domain for developing improved sensitivity with better security against false alarms. Such other types of sensors may include peak detectors, zero crossing detectors, second derivative-equal-to-zero detectors, for example. The invention determines the mean or average, the variance or standard deviation, the mean deviation, and the Kurtosis of sampled data in statistical analysis to discriminate between fires and non-fires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.