公开(公告)号：US11155286B1

公开(公告)日：2021-10-26

申请号：US16483444

申请日：2018-09-27

Applicant: CRRC Nanjing Puzhen Co., Ltd.

Inventor： Guofei Liu ,  Qi Gao ,  Meng Shi ,  Xianing Pan ,  Rujun Liang ,  Yaozheng Zeng

IPC: B61L15/00 ,  H04L12/40

Abstract: The present disclosure relates to a passenger communication output control circuit for an unmanned metro train. The unmanned metro train is installed with passenger emergency communication units each having a communication button and a communication relay. The communication relay has a normally-closed contact pair and is linked with the communication button in a one-to-one correspondence. When the communication button is pushed down, the communication relay is energized to disconnect the normally-closed contact pair. The normally-closed contact pairs of all the coaches are connected in series to form an emergency communication circuit. Two terminals of the emergency communication circuit are respectively connected to a train power supply and an input/output module of a TCMS in the coach. When the passenger information system works normally, both a communication network and hardwire can transmitte the communication signal. When the two communication signals are inconsistent, the communication signal transmitted by hardwire shall prevail.