Method and apparatus for magnetic detection of degradation of jacketed elevator rope

A method and system for detecting or measuring defects in a rope having ferromagnetic tension members includes a magnetic field exciter and an array of magnetic flux sensors corresponding to the tension members in a known relationship. Measurements of magnetic flux leakage are indicative of defects....

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Bibliographic Details
Main Authors GIERAS JACK F, ROBAR TERRY M, STUCKY PAUL A, VERONESI WILLIAM A
Format Patent
LanguageEnglish
Published 14.10.2003
Edition7
Subjects
ELEVATORS
ESCALATORS OR MOVING WALKWAYS
HAULING
HOISTING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LIFTING
MEASURING
PERFORMING OPERATIONS
PHYSICS
TESTING
TRANSPORTING
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Summary:A method and system for detecting or measuring defects in a rope having ferromagnetic tension members includes a magnetic field exciter and an array of magnetic flux sensors corresponding to the tension members in a known relationship. Measurements of magnetic flux leakage are indicative of defects. Another aspect of the invention includes 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.
Bibliography:Application Number: US19990280637