ABNORMALITY DIAGNOSIS DEVICE FOR ROLLING BEARING, WIND POWER GENERATOR, AND ABNORMALITY DIAGNOSIS SYSTEM

摘要

An effective-value calculation unit (120) calculates the effective value of an oscillating waveform of a bearing, the oscillating waveform being measured by using an oscillation sensor (70). An envelope processor (140) generates an envelope waveform of the oscillating waveform by performing envelope processing on the oscillating waveform measured by using the oscillation sensor (70). An effective-value calculation unit (160) calculates the effective value of the AC component of the envelope waveform generated by the envelope processor (140). A diagnosis unit (190) diagnoses a bearing abnormality, in accordance with the effective value of the oscillating waveform, said effective value being calculated by the effective-value calculation unit (120), and in accordance with the effective value of the AC component of the envelope waveform, said effective value being calculated by the effective-value calculation unit (160).