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US 12,228,459 B2Granted
Fabry-perot based advanced pneumatic fire/overheat detector
AssigneeKidde Technologies, Inc.
InventorsElbert Jeyapaul, Thambiraj Avudaiappan
Life of this patent
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Abstract
A fire or overheat detection device includes a diaphragm adjacent to a chamber with a gas inside the chamber, wherein the diaphragm contacts the gas. The fire or overheat detection system also includes a Fabry-Perot interferometer. At least a portion of the Fabry-Perot interferometer is coupled to the diaphragm via a linkage. A light source is configured to direct an input light into the Fabry-Perot interferometer.
Claims20
A fire or overheat detection device comprising:
- a chamber;
- a gas and a gas charged core within the chamber;
- a diaphragm adjacent the chamber, wherein the diaphragm contacts the gas;
- a Fabry-Perot interferometer, wherein at least a portion of the Fabry-Perot interferometer is coupled to the diaphragm via a linkage;
- a light source configured to direct an input light into the Fabry-Perot interferometer;
- and
- wherein the diaphragm, the chamber, the gas charged core, the Fabry-Perot interferometer, and the light source are all axially aligned along a center axis.
4 more elements
A fire or overheat detection device comprising:
- a tube extending from a first end to a second end, wherein the first end is closed;
- a diaphragm connected to the second end;
- a gas charged core within the tube;
- a gas disposed within the tube;
- a light source outside of the tube and directed toward the diaphragm;
- a first lens aligned with the light source;
- a second lens aligned with the first lens, wherein the first lens is between the light source and the second lens;
- a first mirror between the first lens and the second lens;
- a second mirror between the first mirror and the second lens;
- an image sensor, wherein the second lens is between the second mirror and the image sensor;
- and
- a linkage member connected to the second mirror and to the diaphragm.
9 more elements
A method of operating a fire or overheat detector, the method comprising:
- providing a chamber and a gas charged core within the chamber;
- and detecting a fire or an overheat by releasing a gas from the gas charged core within the chamber to move a diaphragm adjacent the chamber in a first direction, wherein a second mirror of a Fabry-Perot interferometer is connected to the diaphragm by a linkage member and moves in the first direction when the diaphragm moves in the first direction toward a first mirror that remains static.
Dependencies are inferred from the claim text.