Fluorescent light immunity through synchronous sampling
US8102259B2 · kind B2 · utility
0Cited by
12References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 2006 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Nov 24, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/187
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for reducing interference caused by fluorescent light on alarm system components using synchronous sampling is provided. The system incorporates a detector for detecting the line frequency of a power line and synchronizes the security system to the detected line frequency. The detector employed may be a light emitting diode configured as a photodetector, an antenna tuned for frequencies near 55 Hz, or a filter connected to an output of a Microwave channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.