| 摘要 |
<p>The invention provided an abnormal sound diagnosis device. Time-frequency analysis of waveform data of the sound or vibration of an object device which is taken in by a waveform data acquisition unit is made by a time-frequency analyzing unit, the time-frequency distribution of the time axis and the frequency axis is determined, a plurality of regions specified by coordinate values of the time axis and the frequency axis of the time-frequency distribution are generated, regions containing variation components different from a stable state of the time-frequency distribution are extracted by a region extracting unit, and abnormality judgment and outputting are performed by a judging unit based on the time-frequency distribution contained in the extracted regions.</p> |
