G - Physics – 01 – D
Patent
G - Physics
01
D
G01D 5/353 (2006.01) G01D 21/02 (2006.01) G01N 21/41 (2006.01) G02B 6/028 (2006.01)
Patent
CA 2539140
In accordance with one exemplary embodiment the invention provides a multi- parameter fiber optic sensing system (10) with an aperiodic sapphire fiber grating (16) as sensing element (14) for simultaneous temperature, strain, NOx, CO, O2 and H2 gas detection. The exemplary sensing system (10) includes an aperiodic fiber grating (16) with an alternative refractive index modulation for such multi-function sensing and determination. Fabrication of such quasiperiodic grating structures (16) can be made with point-by-point UV laser inscribing, diamond saw micromachining, and phase mask-based coating and chemical etching methods. In the exemplary embodiment, simultaneous detections on multi-parameter can be distributed, but not limited, in gas/steam turbine exhaust, in combustion and compressor, and in coal fired boilers etc. Advantageously, the mapping of multiple parameters such as temperature, strain, and gas using sapphire aperiodic gratings (16) improves control and optimization of such systems (10) directed to improve efficiency and output and reduce emissions.
Deng Kung-Li Justin
Krok Michael Joseph
Mccarthy Kevin Thomas
Taware Avinash Vinayak
Xia Hua
Company General Electric
Craig Wilson And Company
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