BDS精密单点定位在桥梁变形监测中的应用
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摘要
桥梁变形监测是进行桥梁健康评估和后期修缮的重要内容.本文基于北斗卫星导航系统(BDS)精密单点定位技术,对实时采集的高频率BDS/GPS数据进行精密单点定位(PPP)静态和动态处理,并以相对静态定位结果作为参考,分析在桥梁复杂环境下BDS的PPP的精度,并把北斗动态PPP结果与GPS做对比.研究结果表明,在1 h连续变形监测时间左右,北斗静态PPP精度和BDS动态PPP定位精度可以达到厘米级,可以监测出大型车辆经过桥梁时的变形情况,并与GPS监测变形趋势基本一致.
Bridge deformation monitoring is an important part of bridge health assessment and repair. Based on BDS's precise single-point positioning technology, this paper conducts PPP static and dynamic processing on high-frequency BDS/GPS data collected in real time, and uses relative static positioning results as a reference to analyze the precision of BDS's precision single-point positioning in a complex bridge environment. Compare BDS dynamic PPP results with GPS, the research results show that the BDS static precision single point positioning accuracy and the BDS dynamic PPP positioning accuracy can reach centimeter level around 1 h continuous deformation monitoring time. We can monitor the deformation of large vehicles passing through the bridge, which is basically consistent with the GPS monitoring deformation trend. With the continuous improvement of BDS's positioning accuracy, BDS's precise single-point positioning can become a new method for bridge deformation monitoring.
Bridge deformation monitoring is an important part of bridge health assessment and repair. Based on BDS's precise single-point positioning technology, this paper conducts PPP static and dynamic processing on high-frequency BDS/GPS data collected in real time, and uses relative static positioning results as a reference to analyze the precision of BDS's precision single-point positioning in a complex bridge environment. Compare BDS dynamic PPP results with GPS, the research results show that the BDS static precision single point positioning accuracy and the BDS dynamic PPP positioning accuracy can reach centimeter level around 1 h continuous deformation monitoring time. We can monitor the deformation of large vehicles passing through the bridge, which is basically consistent with the GPS monitoring deformation trend. With the continuous improvement of BDS's positioning accuracy, BDS's precise single-point positioning can become a new method for bridge deformation monitoring.
引文
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[14] 刘惠涛.GPS/GLONASS组合动态精密单点定位研究[D].西南交通大学,2017.
[2] 李超,谷守周,党亚民,等.不同时长的北斗精密单点定位精度分析[J].测绘科学,2016,41(12):1-4,26.
[3] 王阅兵,游新兆,金红林,等.北斗导航系统与GPS精密单点定位精度的对比分析[J].大地测量与地球动力学,2014,34(4):110-116.
[4] 张小红,李星星,郭斐,等.GPS单频精密单点定位软件实现与精度分析[J].武汉大学学报(信息科学版),2008,33(8):783-787.
[5] 郭斐.GNSS精密单点定位质量控制与分析的相关理论和方法研究[D].武汉大学,2013.
[6] 唐卫明,惠孟堂,崔健慧,等.北斗多频伪距单点定位精度分析[J].测绘科学,2016,41(3):8-11.
[7] NISTOR S,BUDA A S.Ambiguity Resolution In Precise Point Positioning Technique:A Case Study[J].Journal of Applied Engineering Sciences,2015,5(1):53-60.DOI:10.1515/jaes-2015-0007.
[8] 魏子卿,叶世荣.GPS相对定位的数学模型[M].北京:测绘出版社,1998.
[9] MANAILY E E,RABBOU M A,EL-SHAZLY A,et al.Evaluation of Quad-Constellation GNSS Precise Point Positioning in Egypt[J].Artificial Satellites,2017,52(1):9-18.DOI:10.1515/arsa-2017-0002.
[10] HARIMA K,CHOY S,RIZOS C,et al.An investigation into the performance of real-time GPS+GLONASS Precise Point Positioning (PPP) in New Zealand[J].Journal of Applied Geodesy,2017,11(3):185.DOI:10.1515/jag-2016-0035.
[11] MALINOWSKI M,KWIECIEN J.A comparative study of Precise Point Positioning (PPP) accuracy using online services[J].Reports on Geodesy and Geoinformatics,2016,102(1):15-31.
[12] DAWIDOWICZ K,BARYLA R.GNSS Antenna Caused Near-Field Interference Effect in Precise Point Positioning Results[J].Artificial Satellites,2017,52(2):27-40.
[13] LIN P,ZHANG X H,LI X X,et al.Characteristics of inter-frequency clock bias for Block IIF satellites and its effect on triple-frequency GPS precise point positioning[J].GPS Solutions,2017,21(2):811-822..
[14] 刘惠涛.GPS/GLONASS组合动态精密单点定位研究[D].西南交通大学,2017.