Method and apparatus for magnetic detection of degradation of jacketed elevator rope
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United States of America Patent
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Oct 14, 2003
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N/A
app pub date -
Mar 29, 1999
filing date -
Mar 29, 1999
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Abstract
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.
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