接触网巡检系统空间综合定位方法

Integrated Spatial Positioning Method for Catenary Inspection System

目的:接触网巡检过程中的定位精度是确保采集信息有效性的前提,为了提高接触网巡检系统的定位精度,提出一种采用多定位方式的空间综合定位方法。方法:介绍了接触网巡检系统的主要定位技术;介绍了所提接触网巡检系统空间综合定位系统的基本结构、系统组成、定位算法设计流程、校正算法设计流程和定位校正优先级判定方法;以重庆轨道交通4号线为例,进行空间综合定位系统试验。结果及结论:地铁运营车采用MVB(多功能车辆总线)信号的定位误差约为40 m,地铁运营车采用RFID(射频识别)和锚段校正算法后的定位误差约为20 m;锚段校正算法存在误识别和漏识别等问题,稳定性不如RFID校正;采用空间综合定位系统后,地铁运营车的定位误差减小至5 m以内;所提空间综合定位方法能够有效提高列车的定位精度。

Objective:The positioning accuracy during catenary inspection process is the premise to ensure information acquisition validity.To enhance the positioning accuracy of catenary inspection system,an ISP(integrated spatial positioning)method using multiple positioning techniques is proposed.Method:The main positioning technology of catenary inspection system is introduced.The basic structure,system composition,positioning algorithm design process,calibration algorithm design process,and positioning calibration priority determination method for the proposed ISP system of catenary inspection system are introduced.Taking Chongqing Rail Transit Line 4 as an example,tests are carried out for the ISP system.Result&Conclusion:The positioning error of the metro operating vehicle using the MVB(multi-function vehicle bus)signal is approximately 40 m,while that after the vehicle employing RFID(radio-frequency identification)and anchor segment calibration algorithm is around 20 m.The anchor segment calibration algorithm exhibits issues such as misidentification and missed identification,and its stability is inferior to RFID calibration.By utilizing ISP system,the positioning error of the metro operating vehicle is reduced to less than 5 m,demonstrating that the proposed ISP method can effectively improve the train positioning accuracy.