Smoke detector with external sampling volume using two different wavelengths and ambient light detection for measurement correction
US9140646B2 · kind B2 · utility
6Cited by
71References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2014 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Oct 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In accordance with certain embodiments, a smoke detector determines the presence of smoke particles outside its housing based on measurements of light detected at different wavelengths and corrected based on an ambient light level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.