Abnormality detection system and abnormality detection method

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United States of America Patent

PATENT NO 9915620
SERIAL NO

14693246

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Abstract

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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.

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Patent Owner(s)

  • FUJITSU LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishinabe, Minoru Atsugi, JP 29 194
Kasajima, Takeo Machida, JP 34 112
Tadaki, Kyoko Atsugi, JP 12 39
Takei, Fumio Isehara, JP 55 477
Uno, Kazushi Atsugi, JP 68 230

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