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Title:
ABNORMALITY DIAGNOSIS DEVICE AND ABNORMALITY DIAGNOSIS METHOD FOR HYDRAULIC OPERATION MECHANISM
Document Type and Number:
WIPO Patent Application WO/2019/097668
Kind Code:
A1
Abstract:
An abnormality diagnosis device (2) diagnoses abnormality of a hydraulic operation mechanism (1) which operates turning on and off of a breaker. The abnormality diagnosis device (2) is provided with: a first counter (21) which is a counter for counting the number of times a pressure rise action that is started when hydraulic pressure held in the hydraulic operation mechanism (1) reduces to a first reference pressure and is stopped when the hydraulic pressure rises to a second reference pressure has been carried out; a timer (24) which measures an action interval that is a time between the stopping of the pressure rise action and the start of the next pressure rise action; and an abnormality determination unit (25) which, on the basis of the action interval, corrects the number of times of the pressure rise action found on the basis of the result of counting by the counter, and determines the presence or absence of abnormality in the hydraulic operation mechanism using data relating to the corrected number of times of the pressure rise action.

Inventors:
MATSUMOTO, Daigo (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2017/041444
Publication Date:
May 23, 2019
Filing Date:
November 17, 2017
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H01H33/34
Foreign References:
JP2011185396A2011-09-22
JP2008004413A2008-01-10
JPH06108977A1994-04-19
JPH0554760A1993-03-05
JPH0337925A1991-02-19
JPH02297824A1990-12-10
JPS6430126A1989-02-01
JPS56153628A1981-11-27
JPS536886A1978-01-21
Attorney, Agent or Firm:
TAKAMURA, Jun (Sakai International Patent Office, Toranomon Mitsui Building 8-1, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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