Estudo da aplicação do GPS no monitoramento de deslocamentos em estruturas

• Autor(a) principal: Poleto, Leandro José do Carmo
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3731
• topic: Deslocamento; Monitoramento; GPS; Confiabilidade; Ajustamento; Dislocation; Monitoring; GPS; Reliability; Adjustment; CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEODESIA

The objective of this thesis was to present a study of the global positioning system used to monitor the displacement of structures. A methodology to determine the observations, processing and data adjustment besides of the application of relevant statistical analysis to evaluate the obtained data was presented. Two positioning stations of the IBGE, which possess coordinates and accuracy known, were used to obtain the observations. At the same time were also obtained the observations in a simulation plate of displacement, which was installed in a third station. Five days of field observations were performed. The position of the GPS receiver in the plate was changed in each day. In order to have a greater number of observations to the same number of parameters to be determined, five sections of observations per day were achieved. The positions of the GPS in the plate were 00, 05, 15, 35 e 60 mm in each day of observation, respectively. The analysis of displacement among these positions and the combinations between them was achieved. All the observations were obtained in the Campus of the Federal University of Viçosa. The baselines were obtained through the GPS observations. Then, these baselines were submitted to the adjustment using routines programmed in the MATLab. In these routines were performed the adjustment, the analysis of reliability and the test of congruence. As a result, the coordinates of the points in the cartesian and topocentric systems with their respective accuracy were achieved. The test of congruence detected existence of displacement. It was possible to identify the difference between the distance dislocated in the field and the distance obtained using the GPS. Additionally, by the ellipse of errors was possible to identify the errors in all the directions.