US 11,921,137 B2
Anomaly detection apparatus, method, and program
Tenta Sasaya, Tokyo (JP); Takashi Watanabe, Yokohama (JP); and Toshiyuki Ono, Kawasaki (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed on Feb. 16, 2022, as Appl. No. 17/651,306.
Claims priority of application No. 2021-150373 (JP), filed on Sep. 15, 2021.
Prior Publication US 2023/0079397 A1, Mar. 16, 2023
Int. Cl. G01R 23/16 (2006.01)
CPC G01R 23/16 (2013.01) 10 Claims
OG exemplary drawing
 
1. An anomaly detection apparatus comprising at least one processing circuit configured to:
calculate a reconstruction error of an input signal being a time-series signal,
calculate cycle information indicating cyclic property of the reconstruction error, and
determine presence/absence of an anomaly signal in the input signal on the basis of the cycle information or the cycle information and the reconstruction error.