便携式地铁车地通信检测系统设计

Design of portable testing system for metro communication

上海轨道交通2号线的车地通信(TGC)系统由于使用年限较长,随着温度及电磁环境的变化,轨旁移频键控(FSK)信号收发装置电感、电容值会发生漂移,进而影响到列车与站台之间的通信质量,最终造成列车运行出现晚点、不停站或冲出站台等问题。为了方便工作人员能够及时发现TGC系统的通信问题,设计一种便携式TGC检测装置,对TGC信号质量进行实时监测并记录,找到被测FSK信号的参数与环线通信装置谐振频率、补偿电容参数之间的关系,并建立对应的数据库。

Due to long service life,the train-ground communication(TGC)system of Shanghai Metro Line 2 drifts along with the change of temperature and electromagnetic environment,the inductance and capacitance of trackside frequency shift keying(FSK)signal transceiver will drift,which will affect communication quality between train and platform,eventually resulting in late train operation,non-stop or out of the platform and other issues. In order to facilitate the staff to discover the communication problems of TGC system in time,a portable train ground communication detection device is designed to monitor and record the signal quality of TGC in real time, relationship between parameters of the measured FSK signal and resonance frequency and compensation capacitor parameters of loop communication device are found,corresponding database is established.