Method and hoisting device
AssigneeKone Corporation
InventorsHannu Lehtinen, Jukka Penttila, Juha Helenius
Life of this patent
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Abstract
The invention relates to a method for monitoring condition of a rope of a hoisting device, which rope comprises one or more load bearing members oriented to extend parallel with longitudinal direction of the rope throughout the length thereof. The method comprises measuring strains of one or more portions of a load bearing member of the rope; and comparing the measured strains of one or more portions of a load bearing member of the rope with at least one reference. The invention also relates to a hoisting device implementing the method.
Claims20
A method of monitoring a condition of a rope of a hoisting device, the rope including one or more load bearing members oriented to extend parallel with a longitudinal direction of the rope throughout a length thereof, the method comprising:
- reading, via a receiver located adjacent to a rope wheel of the hoisting device, measurements of strains of one or more portions of a load bearing member of the rope as the one or more portions of the one or more load bearing members rests on a circumference of the rope wheel such that the measurements are associated with the strains observed when the one or more portions are arched by the rope wheel;
- and
- comparing the measured strains of the one or more portions of the load bearing member of the rope with at least one reference.
A hoisting device, comprising:
- a rope including one or more load bearing members oriented to extend parallel with longitudinal direction of the rope throughout a length thereof;
- a rope wheel with a receiver adjacent thereto;
- and
- a controller configured to,
- read, via the receiver, measurements of strains of one or more portions of the one or more load bearing members of the rope as the one or more portions of the one or more load bearing members rests on a circumference of the rope wheel such that the measurements are associated with the strains observed when the one or more portions are arched by the rope wheel;
- and
- compare the measured strains of the one or more portions of the one or more load bearing members of the rope with at least one reference.
Dependencies are inferred from the claim text.