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Abstract

An anomaly detection apparatus has a model creator, based on a plurality of sensor data input sequentially in time, to create a plurality of candidate models with a plurality of techniques for detection of an anomaly of the sensor data, an accuracy calculator to calculate decision accuracies of the plurality of candidate models, a model selector to select one or more candidate models from among the plurality of candidate models based on the decision accuracies of the plurality of candidate models, to create an anomaly detection model, a data classifier to determine whether new sensor data is normal or abnormal based on the anomaly detection model, and a model updater to update the plurality of candidate models based on the decision accuracies of the plurality of candidate models calculated by the accuracy calculator and on the new sensor data determined to be normal or abnormal by the data classifier.

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