公开(公告)号：EP2999952A4

公开(公告)日：2017-01-18

申请号：EP14801722

申请日：2014-05-21

申请人： KONECRANES GLOBAL CORP

发明人： MESIÄ HEIKKI ,  KEROVUORI JUHANI ,  HARRA ILKKA ,  JANTUNEN AAPO ,  SALOMÄKI JANNE

IPC分类号： G01M13/02 ,  G01H1/00 ,  G01M1/14 ,  G01P3/44 ,  G01R23/18 ,  H02K7/116 ,  H02P29/032

CPC分类号： G01M13/021 ,  G01H1/006 ,  G01P3/44 ,  H02P29/032

摘要： Method/apparatus for performing the following acts on a system that includes an electrical motor followed by a gear, and a speed output unit: monitoring a first set of frequencies from the system over a measurement period when the system is in a known good operating condition; storing the first set of monitored frequencies or derivatives thereof as reference data in a long-term storage system; monitoring a second set of frequencies from the system over a measurement period when the system is in an unknown operating condition; comparing the second set of monitored frequencies with the first set of monitored frequencies in a frequency domain; in the frequency domain, detecting changes between corresponding frequencies resulting from the second set of monitored frequencies and the first set of monitored frequencies.