Global Patent Index - EP 2543977 B8

EP 2543977 B8 20190626 - DIAGNOSTIC METHOD AND DIAGNOSTIC DEVICE FOR A SLIDE BEARING

Title (en)

DIAGNOSTIC METHOD AND DIAGNOSTIC DEVICE FOR A SLIDE BEARING

Title (de)

DIAGNOSEVERFAHREN UND DIAGNOSEVORRICHTUNG FÜR EIN GLEITLAGER

Title (fr)

PROCÉDÉ DE DIAGNOSTIC ET DISPOSITIF DE DIAGNOSTIC POUR UN PALIER LISSE

Publication

EP 2543977 B8 (EN)

Application

EP 11750503 A

Priority

  • JP 2010046767 A
  • JP 2011053734 W

Abstract (en)

[origin: EP2543977A1] A sign of a minor rubbing abnormality of a slide bearing in a diesel engine is accurately detected. In order to realize the accurate detection, the following is performed: detecting waveform data which represents an acceleration of a vibration which occurs when a slide bearing is in operation; transforming acceleration waveform data into an acceleration spectrum of a frequency domain by applying a Fourier transform to the acceleration waveform data; quantifying a plurality of peak information which occurs at a rotational frequency interval of a shaft to be measured in the acceleration spectrum by performing a predetermined signal process combined with rotational frequency information of the shaft; obtaining a characteristic value; monitoring whether the obtained characteristic value has exceeded a predetermined threshold value; and when the characteristic value has exceeded the threshold value, determining that an abnormality has occurred in the slide bearing.

IPC 8 full level

G01M 13/045 (2019.01); G01H 1/14 (2006.01)

CPC (source: EP US)

G01H 1/14 (2013.01 - EP US); G01M 13/045 (2013.01 - EP US)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 2543977 A1 20130109; EP 2543977 A4 20140827; EP 2543977 B1 20190501; EP 2543977 B8 20190626; CN 102834701 A 20121219; CN 102834701 B 20150408; DK 2543977 T3 20190611; HK 1179338 A1 20160122; JP 2016048267 A 20160407; JP 5968217 B2 20160810; JP 6111347 B2 20170405; JP WO2011108391 A1 20130624; KR 101497781 B1 20150302; KR 20120129938 A 20121128; US 2013006551 A1 20130103; US 9588015 B2 20170307; WO 2011108391 A1 20110909

DOCDB simple family (application)

EP 11750503 A 20110221; CN 201180011831 A 20110221; DK 11750503 T 20110221; HK 13106068 A 20130522; JP 2011053734 W 20110221; JP 2012503071 A 20110221; JP 2016002455 A 20160108; KR 20127023031 A 20110221; US 201113582288 A 20110221