Strain measurement
US4173412A · kind A · utility
35Cited by
0References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1977 |
| Grant date | Nov 6, 1979 |
| Priority date | — |
| Expiry date | Jun 29, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/243
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A strain sensor providing an optical read-out that is suitable for use in electrically noisy environment or one subject to mechanical vibration consists of one or a set of single mode optical fibres wound round an expanding strain member. The principle of operation relies upon the fact that transverse straining of a single mode fibre destroys mode degeneracy thereby producing birefringence effects that can be rendered obversable using polarized light and a polarization analyzer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.