关键词: 大坝, 变形监测, GNSS, 多基站, 数据融合

Abstract: GNSS positioning technology is an important means to carry out automatic dam deformation monitoring. GNSS multi-base station has obvious advantages over single-base station. Combined with the influencing factors of baseline processing and adjustment treatment, a data fusion technique for multi- base station based on baseline length and base station stability weight is proposed. The tests on Guandi hydropower dam show that it is easy to check the stability of the datum point and multi-base station provides more reliable reference data. The data fusion technique for GNSS multi-base station is adopted to fuse the processing results from the multi-base station of the same monitoring station and more accurate results are gotten to improve the reliability and accuracy of dam deformation monitoring.

Key words: dam, deformation monitoring, GNSS, multi-base station, data fusion