Title:
BREAKAGE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/217325
Kind Code:
A1
Abstract:
This breakage detection device comprises, for example, a sensor, an extraction unit (24), an extraction unit (25), a detection unit (26), and a determination unit (27). When a rope of an elevator vibrates, an output signal of the sensor fluctuates. The extraction unit (24) extracts a vibration component in a specific frequency band from the output signal of the sensor. The extraction unit (25) attenuates a steady vibration component and a gradually increasing vibration component that depend on the speed of a basket from the vibration component extracted by the extraction unit (24), and extracts a determination signal. The detection unit (26) detects whether or not an abnormal change occurs in the output signal of the sensor on the basis of the determination signal extracted by the extraction unit (25).
Inventors:
NAKAZAWA DAISUKE (JP)
KATO TOSHIAKI (JP)
ITO NORIKAZU (JP)
YAMASAKI SATOSHI (JP)
KATO TOSHIAKI (JP)
ITO NORIKAZU (JP)
YAMASAKI SATOSHI (JP)
Application Number:
PCT/JP2019/017308
Publication Date:
October 29, 2020
Filing Date:
April 23, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
MITSUBISHI ELECTRIC BUILDING TECHNO SERVICE CO LTD (JP)
MITSUBISHI ELECTRIC BUILDING TECHNO SERVICE CO LTD (JP)
International Classes:
B66B5/02
Domestic Patent References:
| WO2019030888A1 | 2019-02-14 | |||
| WO2018131145A1 | 2018-07-19 | |||
| WO2017203609A1 | 2017-11-30 |
Foreign References:
| JP2014108835A | 2014-06-12 | |||
| JP2010222143A | 2010-10-07 | |||
| JPH07257831A | 1995-10-09 |
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (JP)
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