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High precision slope deformation monitoring model based on the GPS/Pseudolites technology in open-pit mine

查看全文 作　　者：WANG Jianpeng, GAO Jingxiang, LIU Chao, WANG Jian School of Environment and Spatial Informatics, China University of Mining & Technology, Xuzhou 221008, China 高影响力作者 出　　处：《Mining Science and Technology》索引2010年第20卷第1期,共7页高影响力期刊 基　　金：supported by the Research Fund of State Key Laboratory of Coal Resources and Mine safety, China University of Mining & Technology (No.08KF07) ;the Doctoral Fund of Ministry of Education for Young Scholar (No.200802901516);the Natural Science Foundation of Jiangsu Province (No.BK2009099);the Special Foundation of NSFC-DEST (No.50810076);the National Natural Science Foundation of China (No.40774010);the National Natural Science Foundation for Young Scholar (No.40904004);the Doctoral Fund of Ministry of Education of China (No.200802900501) 摘　　要：As the number and geometric intensity of visual satellites are susceptible to large slopes in open-pit mines, we propose integration of GPS/Pseudolites (PLs) positioning technology which can increase the number of visible satellites, strengthen the geometric intensity of satellites and provide a precision solution for slope deformation monitoring. However, the un-modeled systematic errors are still the main limiting factors for high precision baseline solution. In order to eliminate the un-modeled systematic error, the Empirical Mode Decomposition (EMD) theory is employed. The multi-scale decomposition and reconstruction architecture are defined here on the basis of the EMD theory and the systematic error mitigation model is demonstrated as well. A standard of the scale selection for the systematic error elimination is given in terms of the mean of the accumulated standardized modes. Thereafter, the scheme of the GPS/PLs baseline solution based on the EMD is suggested. The simulation and experiment results show that the precision factors (DOP) are reduced greatly when PLs is located suitably. The proposed scheme dramatically improves the reliability of ambiguity resolution and the precision of baseline vector after systematic error being eliminated, and provides an effective model for high precision slope deformation monitoring in open-pit mine. 关 键 词：模型精度 变形监测 伪卫星 露天矿 GPS 高边坡 矿山技术 标准化模式
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