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Title:
PLANT MONITORING DEVICE, PLANT MONITORING METHOD AND PLANT MONITORING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/008269
Kind Code:
A1
Abstract:
This plant monitoring device for monitoring a plant is provided with: a measured data acquisition unit which, for each prescribed period, acquires measured data of multiple variables indicating the state of the plant; a comparison unit which compares a diagnostic threshold value, which is for diagnosing anomalies in the plant, and a deviation indicator value, which indicates the deviation between measured data and a reference dataset that relates to the aforementioned multiple variables; a reference data updating unit which updates the reference dataset; and an operation mode switching unit which switches the operation mode of the plant monitoring device between a monitoring mode, in which plant monitoring is performed on the basis of the comparison results by the comparison unit and a learning mode, in which at least the measured data for which the deviation indicator value is greater than the diagnostic threshold value is imported into the reference dataset by the reference data update unit. When the deviation indicator value is greater than the diagnostic threshold value and a learning mode transition condition is satisfied during monitoring-mode operation of the plant monitoring device, the operation mode switching unit switches the operation mode from the monitoring mode to the learning mode.

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Inventors:
NAGANO ICHIRO (JP)
SAITO MAYUMI (JP)
AOYAMA KUNIAKI (JP)
EGUCHI KEIJI (JP)
Application Number:
PCT/JP2022/028141
Publication Date:
February 02, 2023
Filing Date:
July 20, 2022
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD (JP)
MITSUBISHI POWER LTD (JP)
International Classes:
G05B23/02
Foreign References:
JP2019028565A2019-02-21
JP2020091561A2020-06-11
JP2021051698A2021-04-01
Attorney, Agent or Firm:
SSIP PATENT ATTORNEY CORPORATION (JP)
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