Multipath reduction of shaft tower monitoring with GPS in mine
Safe shaft tower operation is an important guarantee for mine production. It’s necessary for monitoring to develop more effective techniques because the traditional measurements are inadequate for the purpose. For this reason, GPS kinematic positioning (RTK) technique was presented to accomplish the task, meanwhile, the main error sources (multipath error) was systematically analyzed. In addition, the Empirical Mode Decomposition (EMD)-Wavelet model was proposed for extracting multipath model. To eliminate the systematic errors, the EMD decomposes the time series to high-frequency part and low-frequency part with the standards of scale selection, which is given in terms of the mean of the accumulated standardized modes, and the tendency of high-frequency part is extracted by Wavelet. Then low-frequency part and the tendency of high-frequency are reconstructed based on EMD theory and the systematic errors mitigation model is demonstrated as well. The scheme of the multipath error reduction based on the EMD-Wavelet is suggested. The experiment shows that the proposed scheme dramatically improves the precision of dynamic coordinate series about 40-70％ after multipath error mitigation.
GPS multipath EMD Wavelet deformation monitoring
ZHANG Yaming SHI Haoshan LIU Yan LIU Chao
School of Electronic & Information, Northwestern Polytechnical University, Xian, China School of Electronic Engineering, Xidian University, Xi’an, China Key Laboratory for Land Environment and Disaster Monitoring of SBSM, China University of Mining and
国际会议
沈阳
英文
265-269
2011-11-22（万方平台首次上网日期，不代表论文的发表时间）