Title:
METHOD AND APPARATUS FOR DIAGNOSING ABNORMAL STATE OF VALVE
Document Type and Number:
WIPO Patent Application WO/2020/105744
Kind Code:
A1
Abstract:
According to an embodiment of the present invention, there is provided a method of diagnosing an abnormal state of a valve including: applying a current having a predetermined intensity to a valve; estimating a resistance value of the valve on the basis of an intensity of a feedback current from the valve according to the application of the current and a voltage between both terminals of the valve; and when a difference between a resistance value of the valve estimated at a first time point and a resistance value of the valve estimated at a second time point is greater than or equal to a threshold, determining that abnormality has occurred in the valve.
More Like This:
Inventors:
LEE EUN BYEOL (KR)
Application Number:
PCT/KR2018/014223
Publication Date:
May 28, 2020
Filing Date:
November 19, 2018
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
LEE EUN BYEOL (KR)
LEE EUN BYEOL (KR)
International Classes:
F16K37/00; F16K31/02
Domestic Patent References:
| WO2000048157A1 | 2000-08-17 |
Foreign References:
| US20150014561A1 | 2015-01-15 | |||
| US20100217545A1 | 2010-08-26 | |||
| US20160291075A1 | 2016-10-06 | |||
| US6111514A | 2000-08-29 |
Other References:
See also references of EP 3884188A4
Attorney, Agent or Firm:
HANA IP LAW FIRM (KR)
Download PDF: