Patent ID: 8146433

Claim:
A failure detect device that detects the presence of a failure in a predetermined peripheral member disposed to either one of a rotary shaft and a power transmission path that passes through the rotary shaft by analyzing a vibration generated in a device provided with the rotary shaft when the rotary shaft is rotated, comprising: a vibration detecting unit that detects the vibration of the device; a rotation speed detecting unit that detects a rotation speed of the rotary shaft; an analyzing unit that calculates a frequency spectrum of the vibration detected by the vibration detecting unit and determining an actually measured vibration level at each vibration order by dividing a frequency component of the calculated frequency spectrum by the rotation speed detected by the rotation speed detecting unit; and a detecting unit that detects the presence of a failure in the predetermined peripheral member on the basis of the actually measured vibration level at each vibration order determined by the analyzing unit.