US 12,174,084 B2
Anomaly detection system and anomaly detection method
Tasuku Okimoto, Tokyo (JP); Keita Hihara, Tokyo (JP); Yusuke Fukushi, Tokyo (JP); and Hideki Tomiyama, Tokyo (JP)
Assigned to THE JAPAN STEEL WORKS, LTD., Tokyo (JP)
Appl. No. 17/425,891
Filed by THE JAPAN STEEL WORKS, LTD., Tokyo (JP)
PCT Filed Feb. 22, 2019, PCT No. PCT/JP2019/006703
§ 371(c)(1), (2) Date Jul. 26, 2021,
PCT Pub. No. WO2020/170409, PCT Pub. Date Aug. 27, 2020.
Prior Publication US 2022/0276126 A1, Sep. 1, 2022
Int. Cl. G01M 13/028 (2019.01); F16H 57/01 (2012.01)
CPC G01M 13/028 (2013.01) [F16H 57/01 (2013.01); F16H 2057/018 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An anomaly detection system for detecting an anomaly in a reduction drive, the anomaly detection system comprising:
a sensor attached to a housing of the reduction drive, the sensor being configured to detect vibration on a surface of the housing of the reduction drive;
a statistical analysis unit configured to perform a statistical analysis on the vibration detected by the sensor;
a frequency analysis unit configured to perform a frequency analysis on the vibration detected by the sensor; and
an anomaly determination unit configured to perform anomaly determination on the reduction drive based on a result of the statistical analysis and a result of the frequency analysis,
wherein
the housing of the reduction drive has a substantially box shape,
the sensor comprises a plurality of sensors, each of the sensors being attached, near a corner of the housing, onto a corresponding one of three faces defining the corner, and
acceleration in three-axis directions near the corner of the housing is measured using each of the sensors.