Method and system for detecting exposure of composites to high-temperature
AssigneeThe Boeing Company
InventorsGary E. Georgeson, Megan N. Watson, Morteza Safai
Life of this patent
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Abstract
A method of detecting high-temperature exposure of a composite may include applying a composition comprising an adduct suitable for detecting heat and/or mechanical stress in a composite, wherein the adduct reverts to first and second adduct components after exposure of the composition to a temperature of from about 190° C. to about 260° C. to a surface of the composite; exposing the surface to which the composition has been applied to ultraviolet light; and measuring fluorescence of the composition.
Claims20
A method of detecting high-temperature exposure of a composite, the method comprising:
- applying a composition comprising an adduct suitable for detecting heat and/or mechanical stress in a composite, wherein the adduct reverts to first and second adduct components after exposure of the composition to a temperature of from about 190° C. to about 260° C. to a surface of the composite;
- exposing the surface to which the composition has been applied to ultraviolet light;
- and measuring fluorescence of the composition.
A method of detecting high temperature exposure of a composite in need thereof, the method comprising:
- applying a composition comprising an adduct suitable for detecting heat and/or mechanical stress in a composite, wherein the adduct reverts to first and second adduct components after exposure of the composition to a temperature of from about 190° C. to about 260° C. to a surface of the composite;
- exposing the surface to which the composition has been applied to ultraviolet light;
- and
- measuring fluorescence of the composition.
A method of detecting high-temperature exposure of a composite, the method comprising:
- applying a composition comprising an adduct suitable for detecting heat and/or mechanical stress in a composite, wherein the adduct reverts to first and second adduct components after exposure of the composition to a temperature of from about 190° C. to about 260° C. to a surface of a component made of the composite;
- exposing the surface to which the composition has been applied to ultraviolet light,
- measuring fluorescence of the composition;
- and
- determining exposure to high temperature between steps (a) and (b) by comparing the fluorescence of the composition measured in step (c) to fluorescence of a sample of the composition unexposed to high temperature.
A system for detecting a high temperature exposure of a composite, the system comprising:
- an excitation source for transmitting light of a first wavelength onto a surface of the composite, the surface including a composition having an adduct selected to revert to first and second adduct components in response to exposure of the composition to at least one of heat and mechanical stress;
- and
- a detector configured to receive light of a second wavelength as a result of composition fluorescence upon adduct reversion to the first and second adduct components in response to exposure of the composition to the at least one of the heat and mechanical stress.
Dependencies are inferred from the claim text.