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
2017-12-07
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES |