Title:
PLANT DIAGNOSTIC DEVICE AND PLANT DIAGNOSTIC METHOD
Document Type and Number:
WIPO Patent Application WO/2012/073289
Kind Code:
A1
Abstract:
Provided is a plant diagnostic device able to detect forewarning that the plant is on the way form normal to abnormal status. The plant diagnostic device diagnoses the plant's operational status on the basis of a measurement signal in which a state quantity is measured from the plant, and displays the diagnostic result on an image display device. The plant diagnostic device is provided with: a learning means for constructing a model used in the diagnosis using the measurement signal that measures the state quantity of the plant; and a diagnostic means for diagnosing the operational status of the plant using the model built by the learning means. The learning means has a categorization unit that categorizes data with similar values into the same category; a period determination unit that determines the normal period, forewarning period and abnormal period by assessing the difference in trends in the measurement signal on the basis of the categorization result of the categorization unit; and a model construction unit that constructs a normal model using measurement signals in the normal period. The plant diagnostic device is configured so that the diagnostic means determines whether or not the measurement signal at the current time is categorized into the normal model constructed by the model construction unit; and in the case that the measurement signal at the current time is within the normal model, diagnoses that the plant is in normal status and such is displayed on the image display device; and in the case that the measurement signal at the current time is not within the normal model, diagnoses that the plant is in an unknown status not experienced previously and such is displayed on the image display device.
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Inventors:
SEKIAI, Takaaki (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
関合孝朗 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, JP)
EGUCHI, Toru (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
江口徹 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, JP)
KUSUMI, Naohiro (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
関合孝朗 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, JP)
EGUCHI, Toru (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
江口徹 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, JP)
KUSUMI, Naohiro (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
Application Number:
JP2010/007025
Publication Date:
June 07, 2012
Filing Date:
December 02, 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)
SEKIAI, Takaaki (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
関合孝朗 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, JP)
EGUCHI, Toru (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
江口徹 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, 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)
SEKIAI, Takaaki (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
関合孝朗 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, JP)
EGUCHI, Toru (HITACHI LTD., 2-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 21, 〒3191221, JP)
江口徹 (〒21 茨城県日立市大みか町七丁目２番１号 株式会社日立製作所 エネルギー・環境システム研究所内 Ibaraki, 〒3191221, JP)
International Classes:
G05B13/02; G05B23/02
Attorney, Agent or Firm:
Polaire I.P.C. (7-1Hatchobori 2-chome, Chuo-ku Tokyo, 32, 〒1040032, JP)
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Claims: