Patent ID: 9612190
Date: 2017-04-04
CPC Classifications: G01L,G01N

Claim:
1. Process for bond stress measurement comprising: identifying fluorescing particles sensitive to stress, said fluorescing particles emitting a first predetermined spectral intensity responsive to photons at a discrete wavelength in an unstressed condition and a second predetermined shifted spectral intensity responsive to photons at a discrete wavelength induced by a stressed condition; mixing the fluorescing particles within an adhesive subsequently used in a bonded structure having a first fiber composite component, a second fiber composite component, a layer of the adhesive bonding the first fiber composite component and second fiber composite component; providing a stimulus light with a light source emitting photons at the discrete wavelength for inducing fluorescence in the fluorescing particles; observing characteristics of fluorescent light emitted from the fluorescing particles with a light detector receiving fluorescent light emitted from the fluorescing particles, said emitted light being indicative of the stress experienced by the fluorescing particles; and translating the fluorescent light characteristics into stress data.