Patent ID: 11892826
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. An anomaly detection system that detects an anomaly or an omen of an anomaly of equipment of a monitoring target on a basis of operation data of the equipment, comprising:
a device that collects operation data from the equipment; and
an information processing apparatus that detects an anomaly or an omen of an anomaly on a basis of anomaly detection models constructed from the operation data,
the information processing apparatus including
means for collecting the operation data,
means for learning anomaly detection models from the operation data, and
means for calculating an anomaly score of respective operation data from the operation data and the anomaly detection models, and

means for learning an anomaly detection mode from the operation data and the means for learning anomaly detection models in which a dispersion of elements of the anomaly detection models is small among the anomaly detection models,
wherein the means for learning anomaly detection models from the operation data synthesize an anomaly score of an anomaly detection model generated from a plurality of anomaly detection models by weighted linear sum,
wherein, the means for learning anomaly detection models from the operation data generate, when generating a new anomaly detection model from a plurality of anomaly detection models, the new anomaly detection model by sampling the operation data from the plurality of anomaly detection models,
wherein the means for learning anomaly detection models from the operation data perform the sampling by any one of sampling performed based on a random distribution, sampling using an interpolation value or an estimation value, and sampling from a result of learning of a generation model from the operation data.