GPS Technique And Data Processing For Deformation Monitoring Of Hydropower Engineering

With the development of science and electronic technology, The new monitoring techniques are applied in hydroelectricity engineering deformation monitoring continually. The application of new techniques must lead to some technology problems such as monitoring technique, data processing need to be solved. GPS being the representative of surveying technique, is playing huge roles gradually in engineering deformation monitoring in recent years. In hydropower engineering, the deformation monitoring of landslide, high slope, dam more and more need the high-automatic and high precise technique. Because GPS is different to conventional monitoring technique, Observation data of itself and deformation monitoring data need to be solved effectively so that to satisfy the need of deformation monitoring. Against the problems, the paper develops the research, and obtains the results as following :1. The author studies deeply and analyzes that the different combined observations effect on GPS solutions, and gains the selective preference methods of observations. Through analyzing the original of error, its influence regularity, the results of observation selective preference is obtained by experiment.2. The author analytical studies GPS network's quality, optimum design systematically, derives the uniform model of GPS deformation monitoring network adjustment, puts forward to the configuration design technique and method based on sensitivity of GPS deformation monitoring network. Analyzes the quality of GPS network according to the characters of GPS deformation monitoring network, deduces uniform model of GPS deformation monitoring network adjustment to realize the reference datum uniform of different period GPS observation, and avoids introducing system error into deformation analysis to influence the authenticity of deformation analysis.3. The author puts forwards to the reference datum choice of GPS deformation monitoring network based on robust estimation according to the characters of GPS networks, combining the robust estimation with coordination transformation, arrives the aim that judging the stabilization of datum and uniform reference datum. We can not only discover non-stable point but also realize the reference datum uniform of two periods.4. On the basis of retrospect and analysis GPS cycle slip detection and its renovation method and technique, the author puts forward to the technique of GPS cycle slip detection and renovation method by wavelet analysis. The characters of cycle slip and its representation of wavelet changes in different observation combinations are studies deeply, the guiding opinions of GPS cycle slip detection by wavelet change is presented.5. The author puts forward to aggregate analysis forecast model based on wavelet analysis. Combining wavelet analysis and time series analysis and so on to realize the aim of deformation analysis and forecast, this method can improve analysis forecast precision by theory analysis and practice certification.