Aircraft rotor with embedded optical fiber sensor
US11084604B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2019 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Feb 25, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M5/0091
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A blade for a propeller including a blade composite structure includes a Fiber Bragg Grating (FBG) or an Extrinsic Fabry-Perot Interferometric (EFPI) sensor embedded in the blade composite structure. The sensor is configured to receive a signal from a controller operatively connected to the FBG or EFPI sensor, and transmit a signal, responsive to the received signal, to a processor operatively connected to the sensor. The signal response is indicative of a stress measurement indicating a structural characteristic of the blade composite structure. The signal response provides information to determine, based on the signal response, whether the structural characteristic of the blade composite structure is within a predetermined limit indicative of structural integrity of the blade composite structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.