Method and system for distributed fibre optic sensing
US12235400B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2019 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Feb 13, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This application is directed to distributed fiber optic sensing particularly across multiple fiber optic ports with multiple corresponding fiber optic paths. A method is implemented to repeatedly a train of optical signals through a fiber optic network including a plurality of optical fibers distributed across a geographic area using at least one optical signal transmitter, sequentially distribute optical signals in the train through the plurality of optical fiber via corresponding optical fiber ports using an optical switching arrangement, receive backscattered optical signals from the plurality of optical fibers demodulate data from the backscattered optical signals, process the data to identify at least some of the low-frequency weight-induced disturbances, and/or sense the backscattered optical signals in a reduced frequency range. The method is useful to detect low frequency weight-induced disturbances for object tracking against high noise clutter in the higher frequency signal bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.