Method and apparatus for measuring strain using a luminescent photoelastic coating
US6943869B2 · kind B2 · utility
18Cited by
5References
38Claims
0Family size
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Key dates
| Filing date | Apr 4, 2003 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Sep 18, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring strain on a surface of a substrate utilizes a substrate surface coated with at least one coating layer. The coating layer provides both luminescence and photoelasticity. The coating layer is illuminated with excitation light, wherein longer wavelength light is emitted having a polarization dependent upon stress or strain in the coating. At least one characteristic of the emitted light is measured, and strain (if present) on the substrate is determined from the measured characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.