列车运行监控装置自动校时策略优化研究

Research on Optimization of Automatic Timing Strategy for LKJ

阐述了目前列车运行监控装置(LKJ)自动校时硬件架构和校时逻辑,通过分析现场自动校时异常案例,提出几点优化建议:硬件上增加NTP辅助授时设计,以及授时单元采用双套冗余设计;软件上提高卫星时间数据的合格判据标准、优化时钟源正确性判断逻辑和自动校时执行逻辑、在LKJ人机交互单元上增加防错提示;通过LMD对LKJ自动校时进行实时监测和报警。上述策略可避免LKJ自动校时错误,为列车运行控制提供安全、可靠、可信的时钟基准。

Absrtract:The hardware architecture and timing logic of the current automatic timing device of LKJ are described. Through analyzing the abnormal cases of on-site automatic timing, several optimization suggestions are put forward: NTP auxiliary timing design is added to the hardware, and dual redundancy design is adopted for the timing unit;In the software, the qualification criterion of satellite time data is improved, the correctness judgment logic of clock source and the execution logic of automatic time calibration are optimized, and the error prevention prompt is added to LKJ humancomputer interaction unit. The LKJ automatic timing is monitored and alarming in real time by LMD.The above strategy can avoid the LKJ automatic timing errors and provide safe, reliable and credible clock reference for train operation control.