Event detection system and method

G - Physics – 01 – D

Patent

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G01D 1/02 (2006.01) F22B 37/42 (2006.01) G01M 3/26 (2006.01) G01M 3/32 (2006.01) G06F 17/18 (2006.01)

Patent

CA 2265695

A method and system are disclosed for detecting an occurrence of an event in a target system having at least one operational variable that provides an indication of one or more conditions of the target system which change in response to the event. The method comprises the steps of: (a) periodically calculating short and long term averages of sequentially recorded values of the operational variable, the long term average including values in addition to those included in the short term average; (b) calculating the difference between the short and long term averages; and (c) determining the occurrence of an event based upon the difference by performing a statistical evaluation selected from the group consisting of determining the significance of the difference, monitoring a particular pattern of differences, monitoring change in the differences, and combinations of two or more thereof.

Cette invention se rapporte à un procédé et à un système permettant de détecter l'occurrence d'un évènement dans un système cible ayant au moins une variable opérationnelle qui fournit une indication d'une ou de plusieurs conditions du système cible qui changent en réponse à l'évènement survenu. Ce procédé consiste: (a) à calculer périodiquement les moyennes court-terme et long-terme de valeurs enregistrées séquentiellement de la variable opérationnelle, la moyenne long-terme contenant des valeurs qui s'ajoutent à celles incluses dans la moyenne court-terme; (b) à calculer la différence entre les moyennes court-terme et long-terme; et (c) à déterminer l'occurrence d'un évènement en ce fondant sur cette différence, à l'aide d'une évaluation statistique choisie dans le groupe des opérations suivantes: déterminer l'importance de cette différence, contrôler un modèle particulier de différences, contrôler une modification de ces différences et combiner au moins deux de ces opérations.

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