Distributed acoustic sensing and sensor integrity monitoring
US11193817B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2020 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Jun 20, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An arrangement for distributed acoustic sensing and sensor integrity monitoring is adapted to operate in a first operation mode and in a second operation mode. In the first operation mode, the arrangement injects a first light pattern (and successively injects a second light pattern having substantially the same wavelength, both light patterns generated using a light launching module, into the fiber; determines a backscatter change between first backscatter dependent light and second backscatter dependent light detected by the detector, to determine a time change of a characteristic of the fiber. In the second operation mode, the arrangement injects another first light pattern and successively another second light pattern; to determine a backscatter average of other first backscatter dependent light and other second backscatter dependent light detected by the detector, to determine a static characteristic of the fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.