Rolling bearing abnormality detection device and rolling bearing abnormality detection method

A rolling bearing abnormality detection device, comprising:

• a vibration detection unit that detects a vibration generated in a rolling bearing as vibration data;
• a spectrum processing unit that obtains a frequency spectrum of the vibration data detected by the vibration detection unit;
• a peak frequency identification unit that identifies, as a peak frequency, a frequency indicating a peak within a predetermined frequency range including a theoretical frequency that brings about a peak on the frequency spectrum during occurrence of an abnormality, from the frequency spectrum obtained by the spectrum processing unit;
• a monitoring target setting unit that sets the peak frequency as a monitoring peak frequency of a monitoring target in a case where the peak frequency identified by the peak frequency identification unit changes with time;
• and
• an abnormality determination unit that determines whether an abnormality is present in the rolling bearing, based on a peak value of a peak corresponding to the monitoring peak frequency set by the monitoring target setting unit.