关键词: 铁路施工防护系统, 多重冗余预警技术, 基于二次雷达推算预警, 基于北斗定位推算预警

Abstract: In the railway construction process, there are such problems as limited means of train positioning, lack of information exchange and multi-party joint control, and poor effect of personal safety protection. To solve these problems, this paper proposes a railway construction protection system, which builds on high-precision positioning using the Beidou system, and utilizes such technologies as 4G communication and secondary radar communication, to achieve train location tracking and train approach early warning. In terms of train approach early warning, the proposed system utilizes the multiple-redundancy early warning technology, which combines secondary radar projection with Beidou system projection for early warning. The multiple-redundancy early warning technology enables the detection of train approach in the construction area and the subsequent generation of early warning information even when only one early warning mechanism is effective due to such reason as the presence of tunnels, which ensures the reliability of system functions.

Key words: railway construction protection system, multiple-redundancy early warning technology, early warning based on secondary radar projection, early warning based Beidou system projection