面向杆塔沉降监测的北斗载波相位误差抑制系统  

Beidou carrier phase error suppression system for tower settlement monitoring

作　　者：邱骏 周乐超 金会军 程传宗 杨帆 QIU Jun;ZHOU Lechao;JIN Huijun;CHENG Chuanzong;YANG Fan(State Grid Henan Electric Power Company Pingdingshan Power Supply Company,Pingdingshan 467000,China)

机构地区：[1]国网河南省电力公司平顶山供电公司,河南平顶山467000

出　　处：《电子设计工程》2025年第9期72-76,共5页Electronic Design Engineering

基　　金：河南省国网河南省电力公司科技项目(521760230003)。

摘　　要：针对杆塔沉降监测中北斗载波相位受到噪声影响,导致抑制效果不佳的问题,设计北斗载波相位误差抑制系统。设计杆塔沉降监测模块后,基于UBlox Neo-7芯片的接收机结构,通过外接高频滤波器和低噪声放大器调节北斗卫星信号。利用深组合滤波器融合惯性导航系统,捕捉和追踪卫星信号,实现载波分离和编码分离。在不考虑星历误差、对流层延时、电离层延时的情况下,计算基站接收的北斗卫星的载波相位,采用伪距频间组合差的多径效应分析方法计算相位误差。结合载波相位方差、信噪比,反映观测数据质量。根据反映结果,构建相位误差的单差观测矩阵,并将其转换为双差观测矩阵,实现误差抑制。系统测试结果表明,该系统北斗载波相位在0.01 s内出现了最大仅为0.01°的相位误差,能够有效抑制北斗载波相位误差。A Beidou carrier phase error suppression system is designed to address the issue of poor suppression effect caused by noise in tower settlement monitoring.After designing the tower settlement monitoring module,the receiver structure based on the UBlox Neo-7 chip adjusts the Beidou satellite signal through an external high-frequency filter and low-noise amplifier.Using deep combination filters to fuse inertial navigation systems,capture and track satellite signals,and achieve carrier separation and encoding separation.Without considering ephemeris error,tropospheric delay,and ionospheric delay,calculate the carrier phase of the Beidou satellite received by the base station,and use the multipath effect analysis method of pseudorange frequency combination difference to calculate the phase error.Combining carrier phase variance and signal-to-noise ratio to reflect the quality of observed data.Based on the reflected results,construct a single difference observation matrix for phase error and convert it into a double difference observation matrix to achieve error suppression.The system test results show that the Beidou carrier phase of the system has a maximum phase error of only 0.01°within 0.01 s,which can effectively suppress the Beidou carrier phase error.

关 键 词：杆塔沉降监测 北斗载波 相位误差 误差抑制 双差观测矩阵 

分 类 号：TN967.1[电子电信—信号与信息处理]