Use of wavelet transform and fuzzy system theory to distinguish wear particles in lubricating oil for bearing diagnosis
✍ Scribed by Shinji Utsumi; Zen-ichiro Kawasaki; Kenji Matsu-ura; Masatake Kawada
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 334 KB
- Volume
- 134
- Category
- Article
- ISSN
- 0424-7760
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✦ Synopsis
Ferrographic analysis is required in order to detect wear particles in lubricating oil automatically, because the customary approach takes a great deal of time. We propose a new method to detect wear particles in lubricating oil in order to diagnose bearings, by means of local spatial frequency analysis using the wavelet transform. The Gabor function and cylindrical Gabor function are used as the mother functions of the wavelet transform in this paper. The Gabor function is effective in detecting particles which distribute along the lines of magnetic force on the ferrogram slide. The cylindrical Gabor function can detect circular particles. To discriminate the particles, we apply fuzzy system theory to the image transformed by two Gabor functions and show the effectiveness of this method.