漏缆监测技术在轨道交通中的研究与应用

Research and Application of Leakage Cable Monitoring Technology in Rail Transit

随着轨道交通建设的发展,基于4G LTE-M宽带无线专网也进入地铁,LTE-M将承载CBTC信号、PIS等重要数据业务,其信号是通过漏泄承载,实现地铁区间无线信号全覆盖。目前,地铁领域对无线通信的可靠性和安全性要求越来越高,在地铁正常运行下漏缆极易出现故障,一旦漏缆出现故障就会造成通信中断、影响运营安全,而目前漏缆尚缺乏有效便捷的在线监测手段,文章以已建成的上海地铁15号线为研究背景,对漏缆监测技术进行讨论研究,当干线漏缆或漏缆接头处出现故障时,漏缆监测设备将会自动监测发现故障点,精确定位故障点的位置,并通过传输通道上报到网管中心,让相关部门及时处理,为地铁通信信号覆盖提供更加安全的保障。

With the development of rail transit construction,the broadband wireless private network based on 4G LTE-M has also entered the subway.LTE-M will carry important data services such as CBTC signals and PIS,and its signals will be carried through leakage to achieve full coverage of wireless signals in subway sections.At present,the reliability and safety of wireless communication are increasingly required in the subway field.Under the normal operation of the subway,the leaky cable is prone to failure.Once the leaky cable fails,the communication will be interrupted and the operation safety will be affected.At present,there is no effective and convenient online monitoring method for the leaky cable.This paper takes the completed Shanghai Metro Line 15 as the research background to discuss and study the leaky cable monitoring technology.When the leaky cable or the leaky cable joint of the trunk line fails,cable leakage monitoring equipment will automatically monitor and find the fault point,accurately locate the location of the fault point,and report it to the network management center through the transmission channel,so that relevant departments can deal with it in time,providing a safer guarantee for subway communication signal coverage.