Title:
NOISE ANALYSIS METHOD, NOISE ANALYSIS PROGRAM, AND NOISE ANALYSIS DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/250916
Kind Code:
A1
Abstract:
Through the present invention, order resolution and SN ratio are both achieved. This noise analysis method comprises a spectrum calculation step for applying discrete Fourier transformation to the measured value of at least one of vibration and sound generated by a rotating body and calculating a frequency spectrum, a spectrum conversion step for converting the frequency spectrum to an order spectrum, and a filter processing step for applying SN ratio enhancement filter processing to the order spectrum for each range common to an order.
Inventors:
TOYOSHIMA NAOKO (JP)
Application Number:
PCT/JP2020/047553
Publication Date:
December 16, 2021
Filing Date:
December 18, 2020
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
G01H17/00; G01M99/00
Foreign References:
| US20170122816A1 | 2017-05-04 | |||
| JP2012181169A | 2012-09-20 |
Other References:
ONO SOKKI CO., LTD.: "Number ratio analysis and tracking analysis", 17 January 2012 (2012-01-17), pages 1 - 9, Retrieved from the Internet [retrieved on 20210125]
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