The present application relates to elevator technology, in particular to a safety chain device and a safety protection system for an escalator. The safety chain device according to an aspect of the application comprises: a safety chain including a plurality of protective switches connected in series, each of the protective switches is configured to switch from a first state to a second state in the event of abnormal operation of a respective corresponding drive chain; a resistive network encoder coupled with the safety chain and having a plurality of encoder output values, each of the encoder output values corresponds to one of combinations of states of the plurality of protective switches; a processor coupled with the resistive network encoder and configured to output a level signal corresponding to the encoder output values; a first controlled current source coupled with the safety chain and configured to output a first current corresponding to a current flowing through the safety chain; and a second controlled current source coupled with the processor and configured to output a second current corresponding to the level signal.
SAFETY CHAIN DEVICE AND SAFETY PROTECTION SYSTEM FOR ESCALATOR
SICHERHEITSKETTENVORRICHTUNG UND SICHERHEITSSCHUTZSYSTEM FÜR ROLLTREPPE
DISPOSITIF DE CHAÎNE DE SÉCURITÉ ET SYSTÈME DE PROTECTION DE SÉCURITÉ POUR ESCALIER ROULANT
2023-10-11
Patent
Elektronische Ressource
Englisch
IPC: | B66B Aufzüge , ELEVATORS |
Safety chain device and safety protection system for escalator
Europäisches Patentamt | 2023
|SAFETY CHAIN DEVICE AND SAFETY PROTECTION SYSTEM FOR ESCALATOR
Europäisches Patentamt | 2023
|