Title:
ANOMALY DETECTION METHOD AND ANOMALY DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/086805
Kind Code:
A1
Abstract:
Provided are an anomaly detection method and an anomaly detection system in a plant and other facilities. To provide a method for describing a facility condition, the following are performed on an output signal of a multidimensional sensor: (1) generation of normal learning data; (2) calculation of an anomaly measure by using a subspace method or other method; (3) evaluation of the movement trajectories of measured data and learning data by using a linear prediction method or other method and calculation of an error therebetween; (4) description of the facility condition by the anomaly measure and the movement trajectories; and (5) determination of an anomaly. In a case-based anomaly detection, the learning data is modeled by the subspace method, and an anomaly candidate is detected on the basis of the distance relationship between the observed data and a subspace. The movement trajectories are based on a modeling by the linear prediction method.
Inventors:
MAEDA Shunji (HITACHI LTD., 292, Yoshidacho, Totsuka-ku, Yokohama-sh, Kanagawa 17, 〒2440817, JP)
前田 俊二 (〒17 神奈川県横浜市戸塚区吉田町２９２番地 株式会社日立製作所 生産技術研究所内 Kanagawa, 〒2440817, JP)
前田 俊二 (〒17 神奈川県横浜市戸塚区吉田町２９２番地 株式会社日立製作所 生産技術研究所内 Kanagawa, 〒2440817, JP)
Application Number:
JP2010/072614
Publication Date:
July 21, 2011
Filing Date:
December 16, 2010
Export Citation:
Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
株式会社日立製作所 (〒80 東京都千代田区丸の内一丁目６番６号 Tokyo, 〒1008280, JP)
MAEDA Shunji (HITACHI LTD., 292, Yoshidacho, Totsuka-ku, Yokohama-sh, Kanagawa 17, 〒2440817, JP)
株式会社日立製作所 (〒80 東京都千代田区丸の内一丁目６番６号 Tokyo, 〒1008280, JP)
MAEDA Shunji (HITACHI LTD., 292, Yoshidacho, Totsuka-ku, Yokohama-sh, Kanagawa 17, 〒2440817, JP)
International Classes:
G05B23/02; G01D21/00; G01M99/00; G06Q50/00; G08B31/00
Attorney, Agent or Firm:
ASAMURA PATENT OFFICE, p.c. (Room 331, New Ohtemachi Bldg. 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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Claims: