Temperature compensation for fiber optic sensors
US5396568A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Sep 22, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/35303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for achieving thermal compensation of a microbend sensor used in a fiber optic system and exposed to a thermal environment comprises providing a length of optical fiber and a light source at the optical fiber for passing light through the fiber. A detector is provided at the optical fiber for detecting the light passed through the fiber. A section of the fiber is split for establishing an active leg and a reference leg. An active microbend sensor is provided on the active leg in a thermal environment for producing an active signal; and a reference microbend sensor is provided on the reference leg in the thermal environment near the active sensor for producing a reference signal. The active signal and the reference signal are then detected and a compensation for the active sensor is determined based on the active signal and the reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.