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

Claim 13:
14. An apparatus 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 apparatus comprising:
a processor configured to
register values (v1) of the movement characteristics measured for the cycles,
generate a frequency distribution (Fv1) of the registered values (v1),
define intervals for occurrence (F) of the registered values (v1) in the frequency distribution (Fv1),
associate the defined intervals with defined indexes (a, b, c, . . . ),
associate 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,
generate 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),
segment said word string (S) into a sub-set of segmented words (s1, s2, . . . , si) of the defined indexes (a, b, c, . . . ),
determine a frequency of occurrence of the segmented words (s1, s2, . . . , si) in said word string (S) as a first reference term frequency (TF1),
associate the first reference term frequency (TF1) with a first machine component status (M1),
for a subsequently registered set of values of the movement characteristics, determine a corresponding subsequent term frequency (TFn),
compare the subsequent term frequency (TFn) with the first reference term frequency (TF1) to determine a correlation with the first machine component status (M1).