Fiber bragg grating-based advance pneumatic fire/overheat detector
AssigneeKidde Technologies, Inc.
InventorsElbert Jeyapaul, Thambiraj Avudaiappan, Scott Kenneth Newlin
Life of this patent
Estimating the term…
Abstract
A system for detecting a fire or overheating event includes a heat detector, an optical fiber, a photodetector, and a processing unit. The pneumatic heat detector includes a sealed chamber sealed with a diaphragm having an initial position, and the optical fiber is in operable communication with the diaphragm. The optical fiber includes an FBG. The optical signal generator is configured to emit an optical signal with into the optical fiber. The photodetector is configured to receive a reflected optical signal from the FBG. The processing unit is configured to correlate the reflection wavelength of the reflected optical signal with a temperature of the heat detector.
Claims17
A system for detecting a fire or overheating event, the system comprising:
- a heat detector comprising a sealed chamber with a diaphragm;
- an optical fiber in operable communication with the diaphragm, the optical fiber comprising a fiber Bragg grating;
- an optical signal generator configured to emit an optical signal into the optical fiber;
- a photodetector configured to receive a reflected optical signal reflected from the fiber Bragg grating;
- and
- a processing unit configured to correlate a reflection wavelength of the reflected optical signal with a temperature of the heat detector.
A method of detecting an overheat condition, the method comprising:
- transmitting an optical signal into an optical fiber having a fiber Bragg grating, the optical fiber being coupled to a diaphragm of a heat detector;
- detecting a reflection wavelength of a reflected optical signal reflected by the fiber Bragg grating using a photodetector;
- and
- correlating the reflection wavelength to a temperature of the heat detector.
Dependencies are inferred from the claim text.