Method and apparatus for detecting elevator rope degradation using electrical resistance
AssigneeOtis Elevator Company
InventorsTerry M. Robar, William A. Veronesi, Paul A. Stucky, Jack F. Gieras
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Abstract
A method and system for detecting or measuring defects in an elevator rope having electrically conductive tension members, whereby measured electrical resistance in the tension members is indicative of defects.
Claims19
A method for detecting deterioration of the tension-load bearing capacity of an elevator rope that is fixed at termination points in an elevator assembly, the elevator rope comprising an electrically conductive, tension bearing component encased in a non-conductive jacket, the method comprising the steps of:
- applying an electric current through the component substantially between the termination points of the elevator rope;
- determining electrical resistance of the component;
- and
- relating the determined resistance to the tension-load bearing capacity of the elevator rope.
An apparatus for detecting deterioration of the tension-load bearing capacity of an elevator rope that is fixed at termination points in an elevator assembly, the elevator rope comprising an electrically conductive, tension bearing component encased in a non-conductive jacket, the apparatus comprising:
- means for applying an electric current through the component substantially between the termination points of the elevator rope;
- means for determining electrical resistance of the component;
- and
- means for relating the determined resistance to the tension-load bearing capacity of the elevator rope.
An elevator system comprising:
- an elevator rope that is fixed at termination points in an elevator assembly, the elevator rope comprising an electrically conductive, tension bearing component encased in a non-conductive jacket;
- and
- an apparatus for detecting deterioration of the tension-load bearing capacity of the elevator rope, the apparatus comprising
- means for applying an electric current through the component substantially between the termination points of the elevator rope,
- means for determining electrical resistance of the component, and
- means for relating the determined resistance to the tension-load bearing capacity of the elevator rope.
Dependencies are inferred from the claim text.