摘要
应答器是列车控制系统的基本信息传输设备,用于定位时精度高、可靠性强,但其核心部件射频识别(RFID)标签受国外厂商垄断,为此设计一种基于远距离无线电(LoRa)的应答器辅助定位系统。该系统以接收信号强度指示(RSSI)达到峰值作为列车查询器到达应答器位置的判断依据,并通过包络、插值的处理方法得到准确的RSSI值峰值时刻,将该时刻与里程计(ODO)的里程数据结合以实现精确定位。经实验验证,当查询器速度为15、30、60 km/h时,系统的定位精度分别为1.32、2.15、3.4 m,实验表明本文提出的定位方法可实现列车的辅助定位,为应答器国产化提供了一种可行的技术方案。
The balise is the basic information transmission equipment of the train control system.It has high precision and reliability when used for positioning.However,its core component,radio frequency identification(RFID)tags,is monopolized by foreign manufacturers.Therefore,a balise auxiliary positioning system based on long range radio(LoRa)is designed.The system uses the peak value of the received signal strength indication(RSSI)as the basis for judging the position of the train query to the balise,and obtains the accurate peak time of the RSSI value through the envelope and interpolation processing method.The time is combined with the mileage data of the odometer(ODO)to achieve accurate positioning.The experimental results show that the positioning accuracy of the system is 1.32 m,2.15 m and 3.4 m respectively when the speed of the query is 15 km/h,30 km/h and 60 km/h.The experimental results show that the positioning method proposed in this paper can realize the auxiliary positioning of the train,which provides a feasible technical scheme for the localization of the balise.
作者
倪秀琳
Ni Xiulin(Nuctech Company Limited,Beijing 100084,China)
出处
《电子测量技术》
北大核心
2023年第18期179-185,共7页
Electronic Measurement Technology
