Title:
DEFECT DETECTION SYSTEM, DEFECT MODEL CREATION PROGRAM, AND DEFECT DETECTION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/168086
Kind Code:
A1
Abstract:
In the present invention, an evaluation signal which is a signal of a rolling bearing is divided into segments, a first evaluation vector is generated using a first feature value selected in advance and a second evaluation vector is generated using a second feature value for each segment, a first evaluated defect degree and a second evaluated defect degree for a first normal model are calculated, and a defect degree of the evaluation signal is calculated from an overall normal model using the first evaluated defect degree and the second evaluated defect degree as input vectors. The defect degree is furthermore compared with a threshold value, and the bearing is determined to be defective when a defect rate, which is the ratio at which the defect degree exceeds a defect detection threshold value from among all the information included in the evaluation signal, exceeds a predetermined defect rate threshold value.
Inventors:
FUKUI KEN-ICHI (JP)
KITAI MASASHI (JP)
KITAI MASASHI (JP)
Application Number:
PCT/JP2019/007758
Publication Date:
September 06, 2019
Filing Date:
February 28, 2019
Export Citation:
Assignee:
UNIV OSAKA (JP)
NTN TOYO BEARING CO LTD (JP)
NTN TOYO BEARING CO LTD (JP)
International Classes:
G01M13/04; G05B23/02
Foreign References:
| JP2017173321A | 2017-09-28 | |||
| JP2005062154A | 2005-03-10 | |||
| JP2012242336A | 2012-12-10 |
Attorney, Agent or Firm:
NII, Hiromori (JP)
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