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

Claim 6:
7. An anomaly detection apparatus based on IoT, the anomaly detection apparatus comprising:
a principal component analysis unit configured to search 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;
a center point setting unit configured to set 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;
an input unit configured to receive a currently measured measurement data set from the plurality of IoT devices;
a linear transformation unit configured to acquire 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;
a computation unit configured to calculate a Mahalanobis distance between the projection point which is each element in the linear transformation data set, and the set central point; and
a detection unit configured to detect whether or not data of the IoT devices is abnormal by comparing the Mahalanobis distance calculated for each element with a threshold.