Title:
音又は振動の異常診断方法及び音又は振動の異常診断装置
Document Type and Number:
Japanese Patent JP5063005
Kind Code:
B2
Abstract:
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.
Inventors:
Hideaki Ishii
Hiroshi Uemura
Chapter Tadashi
Hiroshi Uemura
Chapter Tadashi
Application Number:
JP2006025154A
Publication Date:
October 31, 2012
Filing Date:
February 01, 2006
Export Citation:
Assignee:
JTEKT Corporation
Chapter Tadashi
Chapter Tadashi
International Classes:
G01H3/08; G01M99/00
Domestic Patent References:
| JP2000046893A | ||||
| JP2005315595A | ||||
| JP10176947A | ||||
| JP2004205385A | ||||
| JP2004085455A |
Other References:
ZHANG Z , 戸田浩, 川畑洋昭,実信号マザーウェーブレットおよびその異常信号抽出への応用,日本機械学会論文集 C,日本,2004年 8月25日,Vol.70, No.696,Page.2360-2367
Attorney, Agent or Firm:
Nobuo Kono