发明名称 |
Abnormality diagnosing method and apparatus for sound or vibration |
摘要 |
<p>A noise detection signal detected at an evaluation point is filtered by a low pass filter, so that an evaluation waveform signal is extracted. A real signal mother wavelet of complex type is derived from the extracted evaluation waveform signal. Using this mother wavelet, an abnormal waveform signal stored in advance is processed by wavelet transformation. Then, a correlation value is calculated between the abnormal waveform signal and the mother wavelet. The correlation value is compared with a predetermined criterion, so that the presence or absence of abnormality in a sound source or vibration source corresponding to each abnormal waveform signal is determined.</p> |
申请公布号 |
EP1816451(A2) |
申请公布日期 |
2007.08.08 |
申请号 |
EP20070290125 |
申请日期 |
2007.01.31 |
申请人 |
JTEKT CORPORATION |
发明人 |
ISHII, HIDEAKI;ZHANG, ZHONG;UEMURA, HIROSHI |
分类号 |
G01H3/00;G01H3/12;G01M99/00 |
主分类号 |
G01H3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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