Patent ID: 11953878
Assignee: TETRA LAVAL HOLDINGS & FINANCE S.A.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for condition monitoring of a cyclically moving machine component, wherein cycles of a motion of the cyclically moving machine component generates measurable movement characteristics, the method comprising:
registering values (v1) of the movement characteristics measured for the cycles,
generating a frequency distribution (Fv1) of the registered values (v1),
defining intervals for occurrence (F) of the registered values (v1) in the frequency distribution (Fv1),
associating the defined intervals with defined indexes (a, b, c, . . . ),
associating the occurrence (F) of the registered values (v1) in the frequency distribution (Fv1) with the respective defined indexes (a, b, c, . . . ) based on the defined intervals,
generating a word string (S) of the defined indexes (a, b, c, . . . ) corresponding to the occurrence (F) of the registered values (v1) in the frequency distribution (Fv1),
segmenting said word string (S) into a sub-set of segmented words (s1, s2, . . . , si) of the defined indexes (a, b, c, . . . ),
determining a frequency of occurrence of the segmented words (s1, s2, . . . , si) in said word string (S) as a first reference term frequency (TF1),
associating the first reference term frequency (TF1) with a first machine component status (M1),
for a subsequently registered set of values of the movement characteristics, determining a corresponding subsequent term frequency (TFn), and
comparing the subsequent term frequency (TFn) with the first reference term frequency (TF1) to determine a correlation with the first machine component status (M1).