Title:
MONITORING SYSTEM AND MONITORING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/080093
Kind Code:
A1
Abstract:
An objective of the present invention is to provide a technology for monitoring the condition of a device or of a processed object. A monitoring system according to one mode of the present invention monitors a device having an AC motor as a motive power and estimates the condition of the device and/or of an object processed by the device, said system comprising: a time-series data acquisition unit which acquires voltage data relating to a drive voltage of the AC motor; a feature value computation unit which analyzes a feature value of an abnormal voltage waveform in a voltage data time-series waveform; and a state estimation unit which estimates the condition on the basis of the feature value of the abnormal voltage waveform.
Inventors:
NAKAMURA AKIHIRO (JP)
DEGUCHI KENTA (JP)
IWAJI YOSHITAKA (JP)
DEGUCHI KENTA (JP)
IWAJI YOSHITAKA (JP)
Application Number:
PCT/JP2019/038679
Publication Date:
April 23, 2020
Filing Date:
October 01, 2019
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G05B19/18; G05B23/02
Domestic Patent References:
| WO2018092188A1 | 2018-05-24 | |||
| WO2018030033A1 | 2018-02-15 | |||
| WO2019049188A1 | 2019-03-14 |
Foreign References:
| JP2016163916A | 2016-09-08 | |||
| JP2006082154A | 2006-03-30 | |||
| US20150051728A1 | 2015-02-19 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY DAI-ICHI KOKUSAI TOKKYO JIMUSHO (JP)
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