Abnormality detection system and abnormality detection method
US9915620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2015 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | May 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An abnormality detection system includes an optical fiber, a Raman scattered light detection unit, and a data processing unit. The detection unit is configured to detect Stokes light and anti-Stokes light which are generated in the optical fiber and to output data on the intensity distribution of the Stokes light in the optical fiber in the length direction thereof and data on the intensity distribution of the anti-Stokes light in the optical fiber in the length direction. The processing unit is configured to calculate the product of a value obtained by applying an FIR filter to the intensity distribution of the Stokes light, and a value obtained by applying the FIR filter to the intensity distribution of the anti-Stokes light for each of locations on the optical fiber in the length direction, and to determine whether or not abnormality is present based on the result of the calculation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.