输电线路智能巡检系统中GPS技术的研究与应用

Research and application of intelligent cycle inspection system of transmission line based on GPS

在高压输电线下进行GPS数据录入,不可避免受电磁场等因素的影响,一是导致伪距测量中的误差增大,使定位精度降低;二是干扰GPS信号,影响接收机的捕获和跟踪,造成GPS信号接收失败、精度降低、轨迹数据的丢包、人员巡检的监督功能失效。为此,通过GPS相位平滑伪距方法提高相对伪距观测值精度,通过设计轨迹坐标监测程序对GPS信息数据的存储情况进行定时检测,有效避免轨迹坐标数据的大量丢包,保证人员的巡检轨迹完整,对巡检人员工作起到良好的监督作用,保证高压输电线路智能巡检系统的正常运行。

GPS data transmission under HVTL can be affected easily by the electromagnetic field and other factors inevitably. Firstly, it increases the inaccuracy in pseudo-range measurement,which decreases the setting accuracy; Secondly, it interrupts GPS signal and affects the receiver＇s capture and track,leading to an interrupted GPS signal receipt and an inaccurate precision,and making staff monitoring system disabled. Aiming at this two aspects, this paper adopts GPS phase smoothing pseudo range method to improve measuring accuracy,and designs the tracking coordinate monitoring program to detect the storage of GPS message data timely, which can avoid the excessive packet-loss and guarantee the integrity of staff monitoring track effectively. It also acts a sound supervi- sory role to the inspectors＇work and ensures the normal operation of intelligent power inspection system of transmission line.