Fiber grating bond joint health monitoring system
US6756580B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 10, 2003 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Jun 10, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/022
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Fiber grating environmental measurement systems are comprised of sensors that are configured to respond to changes in moisture or chemical content of the surrounding medium through the action of coatings and plates inducing strain that is measured. These sensors can also be used to monitor the interior of bonds for degradation due to aging, cracking, or chemical attack. Means to multiplex these sensors at high speed and with high sensitivity can be accomplished by using spectral filters placed to correspond to each fiber grating environmental sensor. By forming networks of spectral elements and using wavelength division multiplexing arrays of fiber grating sensors may be processed in a single fiber line allowing distributed high sensitivity, high bandwidth fiber optic grating environmental sensor systems to be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.