Title:
MAINTENANCE PREDICTION DEVICE AND PREDICTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2014/192356
Kind Code:
A1
Abstract:
[Problem] To provide a maintenance prediction device configured so as to be capable of highly accurate notification of the necessity for maintenance, in a device to be maintained such as a vacuum pump that discharges gas by rotating a rotating body. [Solution] A maintenance prediction device (1) comprising: a sensor unit (2) that outputs an impact generated by a device to be maintained (e.g., a vacuum pump (P)) as a sensor signal (S); and a signal processing unit (3) that processes sensor signals (S). The signal processing unit (3) executes measurement calculation and maintenance prediction. The measurement calculation measures: the interval between the rise and fall of the sensor signal (S), as contact time; the interval between the rise of the sensor signal (S) caused by the nth impact and the rise of the sensor signal (S) caused by the n+1 impact, as an impact interval; or the ratio of the contact time relative to the impact interval, as an impact ratio. Maintenance prediction comprises threshold values for the contact time, the impact interval, or the impact ratio, and outputs maintenance information for the device to be maintained, on the basis of the results of a comparison between the threshold values and the contact time, impact interval, or impact ratio values.
Inventors:
OKADA TAKUYA (JP)
Application Number:
PCT/JP2014/056056
Publication Date:
December 04, 2014
Filing Date:
March 07, 2014
Export Citation:
Assignee:
EDWARDS JAPAN LTD (JP)
International Classes:
F04D19/04
Domestic Patent References:
| WO2010007975A1 | 2010-01-21 |
Foreign References:
| JP2004150340A | 2004-05-27 | |||
| JPH02145696U | 1990-12-11 | |||
| JP2010065594A | 2010-03-25 | |||
| JP2000110777A | 2000-04-18 | |||
| JPH03115796A | 1991-05-16 | |||
| JPH02204697A | 1990-08-14 |
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