ELEVATOR LOAD BEARING MEMBER WEAR AND FAILURE DETECTION

An elevator load bearing member ( 22 ) monitoring device ( 20 ) has a controller ( 30 ) that applies a first signal ( 40 ) and a second signal ( 50 ) to at least one tension member ( 24 ) in the belt. The first signal ( 40 ) in one example has a plurality of ( 42 ) of a selected amplitude and durati...

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Bibliographische Detailangaben
Hauptverfasser:	STUCKY, PAUL A, VERONESI, WILLIAM A
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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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Beschreibung
Zusammenfassung:	An elevator load bearing member ( 22 ) monitoring device ( 20 ) has a controller ( 30 ) that applies a first signal ( 40 ) and a second signal ( 50 ) to at least one tension member ( 24 ) in the belt. The first signal ( 40 ) in one example has a plurality of ( 42 ) of a selected amplitude and duration. The second signal ( 50 ) includes a series of pulses ( 52 ) having a second, shorter duration and lower amplitude. The first signal is useful for providing information regarding a wear condition of the load bearing member. The controller utilizes a response to the second signal to determine a failure condition such as a broken load bearing member.