Cab signaling apparatus is the critical equipment for ground-vehicle communication in electrified railways.With the rapid development of high-speed and heavy-haul railways,the immunity to unbalanced traction current i...Cab signaling apparatus is the critical equipment for ground-vehicle communication in electrified railways.With the rapid development of high-speed and heavy-haul railways,the immunity to unbalanced traction current interference for cab signaling apparatus in the onboard train control system is increasingly demanded.This paper analyzes the interference coupling mechanism of the ZPW-2000 track circuit.Based on electromagnetic field theory and the actual working parameters,a calculation model is established to complete the quantitative research of the cab signal induction process and traction current interference.Then,a finite element model is built to simulate the process.The simulation results under the signal frequency,fundamental and harmonic interference are all consistent with the theoretical calculation results.The practical measurement data verify the coupling relationship between cab signal inductive voltage and rail current.Finally,an indirect immunity test method applying this relation for the cab signals is proposed,and the voltage indexes of the disturbance sources are determined,i.e.,the test limits.The results provide an accurate quantitative basis for the cab signaling research and design of the immunity test platform;besides,the proposed indirect test method can simplify the test configuration and improve test efficiency.展开更多
分析了青藏线应用G S M-R无线机车信号系统的原因和背景,无线机车信号系统分为连续式无线机车信号和接近连续式无线机车信号.以后者为例,从应用上分析其车站设备、车载设备及车地之间通信网络的结构和功能,总结G S M-R的无线机车信号系...分析了青藏线应用G S M-R无线机车信号系统的原因和背景,无线机车信号系统分为连续式无线机车信号和接近连续式无线机车信号.以后者为例,从应用上分析其车站设备、车载设备及车地之间通信网络的结构和功能,总结G S M-R的无线机车信号系统的信息传输过程,其传输方式不受温度、海拔等环境因素影响,工作可靠性高,维修工作量很小,所以G S M-R在我国铁路通信中有广阔的发展前景.展开更多
基金This work was supported in part by the China Railway(Grant No.17CR062)Shenzhen Changlong Railway Electronic Engineering Co.,Ltd.(Project Name:Anti-interference Design and Verification Improvement of Cab Signaling Onboard System Apparatus).
文摘Cab signaling apparatus is the critical equipment for ground-vehicle communication in electrified railways.With the rapid development of high-speed and heavy-haul railways,the immunity to unbalanced traction current interference for cab signaling apparatus in the onboard train control system is increasingly demanded.This paper analyzes the interference coupling mechanism of the ZPW-2000 track circuit.Based on electromagnetic field theory and the actual working parameters,a calculation model is established to complete the quantitative research of the cab signal induction process and traction current interference.Then,a finite element model is built to simulate the process.The simulation results under the signal frequency,fundamental and harmonic interference are all consistent with the theoretical calculation results.The practical measurement data verify the coupling relationship between cab signal inductive voltage and rail current.Finally,an indirect immunity test method applying this relation for the cab signals is proposed,and the voltage indexes of the disturbance sources are determined,i.e.,the test limits.The results provide an accurate quantitative basis for the cab signaling research and design of the immunity test platform;besides,the proposed indirect test method can simplify the test configuration and improve test efficiency.
文摘分析了青藏线应用G S M-R无线机车信号系统的原因和背景,无线机车信号系统分为连续式无线机车信号和接近连续式无线机车信号.以后者为例,从应用上分析其车站设备、车载设备及车地之间通信网络的结构和功能,总结G S M-R的无线机车信号系统的信息传输过程,其传输方式不受温度、海拔等环境因素影响,工作可靠性高,维修工作量很小,所以G S M-R在我国铁路通信中有广阔的发展前景.
