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US 6,144,026 AGranted
Fiber optic grating corrosion and chemical sensor
AssigneesBlue Road Research, The Boeing Company
InventorsEric Udd, Eric D. Haugse, Angela Trego
Life of this patent
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Abstract
A fiber grating corrosion sensor system which includes fiber grating corrosion and/or chemical sensors formed by writing one or more fiber gratings that are transverse load sensitive so that when corrosion occurs to a transverse stress applying sleeve there over, the transverse loading is relieved. The spectral signals from the fiber grating sensors change with variations in transverse strain providing a measurement of the degree of corrosion or change in chemical content.
Claims20
A fiber grating sensor including:
- a fiber grating element, having:
- a fiber grating therein;
- and
- a covering positioned about said fiber grating element to apply transverse stress to said fiber grating, said covering being constructed from material that weakens to reduce the transverse stress applied to said fiber grating when subjected to an environment whose effect is to be sensed.
1 more element
A fiber grating sensor system including:
- a first fiber grating element, having:
- a first fiber grating therein;
- and
- a covering positioned about said first fiber grating element to apply transverse stress to said first fiber grating, said covering being constructed from material that weakens to reduce the transverse stress applied to said first fiber grating when subjected to an environment whose effect is to be sensed.
1 more element
Dependencies are inferred from the claim text.