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Malfunction Detection Method and System Thereof

  • US 20130173218A1
  • Filed: 05/16/2011
  • Published: 07/04/2013
  • Est. Priority Date: 09/07/2010
  • Status: Abandoned Application
First Claim
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1. An anomaly detection method for detecting an anomaly of a plant or an installation, comprising the steps of:

  • obtaining data related to an operation state of the plant or the installation from plural sensors installed at the plant or the installation;

    modeling learning data corresponding to nearly-normal data in a normal operation state of the plant or the installation;

    calculating anomaly measurement of each data obtained from the plural sensors by using the modeled learning data; and

    detecting an anomaly of the plant or the installation on the basis of the calculated anomaly measurement,wherein in the step of calculating anomaly measurement, residual errors from the modeled learning data are obtained for the pieces of data obtained from the plural sensors, a signal having the residual error larger than a predetermined value is removed, andwherein in the step of detecting an anomaly, anomaly detection is performed by recursively calculating the anomaly measurement for the data obtained from the plural sensors from which the signal having the large residual error is removed.

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