| 摘要 |
The invention provides a method of operating an apparatus for analysing the condition of a machine having a part rotating with a speed of rotation (f), comprising the steps of receiving a first digital signal (S, S, S) dependent on mechanical vibrations emanating from rotation of said part; analysing said first digital signal (S, S, S) so as to detect peak amplitude values (A) during a finite time period (T), said finite time period corresponding to a certain amount (R) of revolution of said rotatable part; said certain amount (R) of revolution corresponding to more than one revolution of said monitored rotatable part; defining a plurality (N) of amplitude ranges; sorting said detected peak amplitude values (A) into corresponding amplitude ranges so as to reflect occurrence (N) of detected peak amplitude values (A) within said plurality of amplitude ranges; estimating a representative peak amplitude value(A) in dependence on said sorted peak amplitude values (A) and said certain amount (R). |
