An elevator brake, having a rotatable component mounted to a shaft, is monitored for contamination by projecting electromagnetic radiation onto the rotatable component or onto the shaft, and receiving reflected electromagnetic radiation. If the monitored zone on the rotatable component or the shaft becomes contaminated, for example with oil or grease, the nature of the electromagnetic radiation reflected from the zone will change noticeably.
ELEVATOR BRAKE MONITORING
AUFZUGSBREMSENÜBERWACHUNG
CONTRÔLE DE FREIN D'ASCENSEUR
2017-10-25
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS |