Rotating machine diagnosis method and apparatus with acoustic emission technique

摘要

Disclosed is a rotating machine diagnosis method and apparatus with an acoustic emission (AE) technique, which comprises: an AE sensor (2) mounted on a rotating machine (1) for sensing an acoustic signal of the rotating machine (1); envelope detector means (4, 131) for obtaining an envelope signal from the acoustic signal from the AE sensor (2); waveform-feature processor means (132) for performing signal processing so as to detect a feature of wave­form of an output waveform signal from the envelope detector means; feature decision means (14) for judging whether the feature of waveform belongs to a continuous type or a burst type and/or a rotation-synchronous type or a rotation-­asynchronous type on the basis of an output signal from the waveform-feature processor means; and diagnostic output means (15) for outputting and displaying an output signal from the feature decision means, whereby it is possible to perform judgement simultaneously as to a plurality of kinds of abnormality.