The invention relates to the elevator technology, in particular to a safety chain device and a safety protection system for an escalator. The safety chain device according to one aspect of the present application comprises: a safety link comprising a plurality of protection switches connected in series, each protection switch being configured to switch from a first state to a second state when a respective corresponding drive chain works abnormally; a resistive network encoder coupled to the security link, the resistive network encoder having a plurality of encoder output values, each encoder output value corresponding to one of the state combinations of the plurality of protection switches; a processor coupled with the resistive network encoder and configured to output a level signal corresponding to the encoder output value; a first controlled current source coupled with the safety link and configured to output a first current corresponding to a current flowing through the safety link; and a second controlled current source coupled with the processor and configured to output a second current corresponding to the level signal.
本申请涉及电梯技术,特别涉及用于自动扶梯的安全链装置和安全保护系统。按照本申请的一个方面的安全链装置包括:安全链路,包括多个串联连接的保护开关,每个保护开关配置为在各自对应的驱动链工作异常时由第一状态切换至第二状态;与所述安全链路耦合的电阻网络编码器,具有多个编码器输出值,每个编码器输出值对应于所述多个保护开关的其中一个状态组合;与所述电阻网络编码器耦合的处理器,其配置为输出与所述编码器输出值对应的电平信号;与所述安全链路耦合的第一受控电流源,其配置为输出与流经所述安全链路的电流对应的第一电流;以及与所述处理器耦合的第二受控电流源,其配置为输出与所述电平信号对应的第二电流。
Safety chain device and safety protection system for escalator
用于自动扶梯的安全链装置和安全保护系统
2023-09-19
Patent
Electronic Resource
Chinese
IPC: | B66B Aufzüge , ELEVATORS |
SAFETY CHAIN DEVICE AND SAFETY PROTECTION SYSTEM FOR ESCALATOR
European Patent Office | 2023
|SAFETY CHAIN DEVICE AND SAFETY PROTECTION SYSTEM FOR ESCALATOR
European Patent Office | 2023
|