Title:
DIAGNOSIS DEVICE, DIAGNOSIS SYSTEM, REMOTE MONITORING SYSTEM, AND MAINTENANCE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/170796
Kind Code:
A1
Abstract:
Provided are a diagnosis device, a diagnosis system, a remote monitoring system, and a maintenance system capable of determining abnormality in a bearing using a simple configuration. This diagnosis device diagnoses abnormality in a bearing in an elevator system. The elevator system comprises: a hoisting machine having a first sheave, an electric motor that rotates the first sheave by means of a rotary shaft, and a bearing that supports the rotary shaft; a second sheave; a main rope wound around the first sheave and the second sheave; and a car suspended by the main rope. The diagnosis device comprises a rotation angle calculation unit that calculates a total value of rotation angle by which the first sheave has rotated, and a determination unit that determines abnormality in the bearing on the basis of the total value of rotation angle calculated by the rotation angle calculation unit when the car ran in a specific section.
Inventors:
NAGAHAMA HIDENORI (JP)
NIIKURA SHUHEI (JP)
KIMURA YASUKI (JP)
NIIKURA SHUHEI (JP)
KIMURA YASUKI (JP)
Application Number:
PCT/JP2022/010064
Publication Date:
September 14, 2023
Filing Date:
March 08, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
B66B5/00; B66B3/00
Domestic Patent References:
| WO2017203561A1 | 2017-11-30 | |||
| WO2020089508A1 | 2020-05-07 | |||
| WO2021260942A1 | 2021-12-30 |
Foreign References:
| JPH09136776A | 1997-05-27 | |||
| JP2017203561A | 2017-11-16 | |||
| JP2022018941A | 2022-01-27 | |||
| JP2008156127A | 2008-07-10 | |||
| JP2020040763A | 2020-03-19 |
Attorney, Agent or Firm:
TAKADA, TAKAHASHI & PARTNERS (JP)
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