Fiber optic acoustic wave detection system
US10145726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2017 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Jul 14, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H9/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is a fiber optic acoustic wave detection system, pertaining to the fiber optic sensing technical field. The system comprises a power output apparatus, a backward Rayleigh scattering principle-based first distributed sensing apparatus, a backward weak optical fiber grating reflection principle-based second distributed sensing apparatus, and a third distributed sensing apparatus. The first distributed sensing apparatus and the second distributed sensing apparatus are connected with the power output apparatus, respectively. The first distributed sensing apparatus and the second distributed sensing apparatus are connected with the third distributed sensing apparatus, respectively. Compared with conventional approaches, the signal contrast and sensitivity of the detection system are greatly improved by combining the backward Rayleigh scattered signal in the first distributed sensing apparatus with the backward weak optical fiber grating reflected signal in the second distributed sensing apparatus, and the detection system detection bandwidth is significantly widened by the third distributed sensing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.