Title:
異常検知システム及び異常検知方法
Document Type and Number:
Japanese Patent JP5867618
Kind Code:
B2
Abstract:
[Problem] To provide an abnormality detection system and an abnormality detection method which are capable of detecting abnormality at an early stage, the abnormality occurring in a facility such as a chemical plant, an oil refinery plant, or a thermal power plant. [Solving Means] An abnormality detection system includes an optical fiber 24, a Raman scattered light detection unit 20, and a data processing unit 30. The Raman scattered light detection unit 20 is configured to detect Stokes light and anti-Stokes light which are generated in the optical fiber 24 and to output data on the intensity distribution of the Stokes light in the optical fiber 24 in the length direction thereof and data on the intensity distribution of the anti-Stokes light in the optical fiber 24 in the length direction. The data processing unit 30 is configured to calculate the product of a value obtained by applying an FIR (Finite Impulse Response) filter to the intensity distribution of the Stokes light in the optical fiber 24 in the length direction, and a value obtained by applying the FIR filter to the intensity distribution of the anti-Stokes light in the optical fiber 24 in the length direction for each of locations on the optical fiber 24 in the length direction, and to determine whether or not abnormality is present based on the result of the calculation.
Inventors:
Kazushi Uno
Fumio Takei
Kasashima Takeshi
Kyoko Tadaki
Minoru Ishinabe
Fumio Takei
Kasashima Takeshi
Kyoko Tadaki
Minoru Ishinabe
Application Number:
JP2014543050A
Publication Date:
February 24, 2016
Filing Date:
October 23, 2012
Export Citation:
Assignee:
富士通株式会社
International Classes:
G01K11/32
Domestic Patent References:
| JP2011232138A | 2011-11-17 | |||
| JP2010223831A | 2010-10-07 | |||
| JPH08247858A | 1996-09-27 | |||
| JPH06201488A | 1994-07-19 | |||
| JPH05273081A | 1993-10-22 |
Attorney, Agent or Firm:
Keizo Okamoto