Fiber optic temperature sensors in a distributed smoke detection system
US11422042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2019 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Jan 12, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/183
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A smoke and temperature detection system includes a plurality of fiber optic cables terminating in a plurality of nodes positioned to monitor a fire or smoke condition at one or more protected spaces, and a temperature detection fiber optic cable having a plurality of fiber Bragg gratings arrayed along the temperature detection fiber optic cable. A control system is operably connected to the plurality of fiber optic cables and to the temperature detection fiber optic cable. The control system includes a first light sensitive device configured to receive a scattered light signal from the plurality of fiber optic cables, and a second light sensitive device configured to receive a reflected light signal from the fiber Bragg gratings. The control system is configured to detect a temperature at the fiber Bragg gratings based on one or more properties of the reflected light signal received at the second light sensitive device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.