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Abnormality diagnosing method for sound or vibration and abnormality diagnosing apparatus for sound or vibration.
Abnormality diagnosing method for sound or vibration and abnormality diagnosing apparatus for sound or vibration.
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机译:声音或振动的异常诊断方法以及声音或振动的异常诊断装置。
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摘要
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.
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