Patent ID: 11909751
Assignee: FOUNDATION OF SOONGSIL UNIVERSITY INDUSTRY COOPERATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An anomaly detection method based on Internet of Things (IoT), the anomaly detection method comprising:
searching for one principal component axis maximizing variance of data by analyzing a normal data set collected in time series from a plurality of IoT devices by using a principal component analysis technique;
setting a center point of the principal component axis based on a result of projecting a plurality of normal data which is each element in the normal data set onto the principal component axis;
receiving a currently measured measurement data set from the plurality of IoT devices;
acquiring a linear transformation data set having a plurality of projection points as elements by projecting a plurality of measurement data which is each element in the measurement data set onto the principal component axis;
calculating a Mahalanobis distance between the projection point which is each element in the linear transformation data set, and the set central point; and
detecting whether or not data of the IoT devices is abnormal by comparing the Mahalanobis distance calculated for each element with a threshold.