基于GNSS移动基线的列车完整性监测

为满足下一代列控系统(NGTC)采用车载设备实现列车完整性监测，尽量减少地面设备的要求，本文提出基于全球卫星导航系统(GNSS)移动基线的列车完整性监测方法.列车头部和尾部分别安装列首、列尾天线，通过星间及两天线的站间载波相位差分消除传播路径和钟差等误差的影响；实时解算移动基线长度，并将其与参考车长比较，实现列车的完整性监测.为评估所提算法性能，在京沈高铁进行实验.实验结果显示，基于移动基线的最大车长误差在0.5 m以内，相较于单点定位的最大1.3 m误差有明显提升.

Train Integrity Monitoring Method Based on GNSS Moving Baseline Resolution

In the next generation of the column control system (NGTC), it is proposed to use the onboard equipment to achieve train integrity monitoring and minimize the requirements of wayside equipment. This paper proposes a train integrity monitoring method based on the global satellite navigation system (GNSS) moving baseline. Two antennas are set up at the head and end of the train. The errors of propagation path and clock is eliminated by using carrier phase difference between satellites and two antennas. The length of moving baseline is calculated in real time and compared with the reference train length to realize the integrity monitoring. To evaluate the performance of the proposed algorithm, a real train test was carried out on the Beijing-Shenyang high speed railway in China. The experimental results show that the proposed train integrity resolution method can provide train integrity solutions with an accuracy of 0.5 meters or better, which is significantly improved compared with the maximum 1.3-meter error of single point positioning.