System and method of target based smoke detection
US8497904B2 · kind B2 · utility
3Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2009 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | May 30, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/125
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A smoke detector includes processing circuitry coupled to a camera. The field of view of the camera contains one or more targets, each having spatial indicia thereon. The processing circuitry collects a sequence of spatial frequency measures, such as contrast indicating parameters. Members of the sequence can be compared to at least one reference spatial frequency measure to establish the presence of smoke between the target and the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.