基于二次雷达的列车辅助防护系统通信方法研究
2021-03-16杨丽丽王延翠
杨丽丽 王延翠


摘要:目前,城市轨道车辆已逐渐开始二次雷达通信方法进行前、后列车距离检测,并用于列车安全的辅助防护。本文针对二次雷达通信过程中目标识别准确性、信息交互的有序性和稳定性等问题进行技术分析,重点研究了采用天线背瓣抑制技术和车辆身份识别技术解决通信中虚假目标问题,采用频带隔离技术和通信数据时隙分配等技术解决通信干扰和稳定性等问题,最后,综合应用上述关键技术提出了一种可行的雷达辅助防护系统通信方法。
关键词:二次雷达 时隙分配 频带隔离 身份识别 隔离
中文分类号:U270.2 文献标识码:A
Abstract: At present, on urban rail vehicles, the secondary radar communication method has gradually begun to detect the distance between the front and rear trains, and also used for auxiliary protection of train safety. In this article, technical analysis is made on the accuracy of target identification, order and stability of information interaction in the communication process of secondary radar, and it focuses on the use of antenna back lobe suppression technology and vehicle identification technology to solve the problem of false targets in communication, and uses band isolation technology and communication data slot allocation technology to solve the problems of communication interference and stability. Finally, Based on the above key technologies, a feasible communication method of radar auxiliary protection system is proposed.
Key Words: Secondary radar; Time slot allocation; Band isolation;Identification; Isolation
軌道车辆的运行安全一般由列车自动防护系统(ATP)进行防护。近年来,在ATP被切除或不可用时,为了保证列车安全,提高列车的运营效率,常采用二次雷达等测距手段提供辅助的安全防护手段。在一些实际应用场景中,多个目标集中出现在可探测范围内,从中快速精准辨别出防护目标并确保彼此间信息交互的稳定性是系统实现可靠辅助防护的关键。
曲越[1]、胡劲文[2]等提出基于多传感器融合技术,采用视觉传感器和激光雷达相结合的方法,识别道路边界,限定前方车辆的检测区域,进行列车运行限界内障碍物的检测。电子科技大学的钱卫中[3]提出了一套RFID电子标签进行列车定位和防撞的方法。
上述方法通过不同技术手段可在一定程度上解决目标识别的问题,但需增加视觉传感器等相应硬件设备。……
