Método e algoritmo de reconstrução de curva para o monitoramento de deslocamento de solo através de sensores a rede de Bragg

Detalhes bibliográficos
Ano de defesa: 2018
Autor(a) principal: Lima, Lucas Antônio Cunha
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal do Rio de Janeiro
Brasil
Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia
Programa de Pós-Graduação em Engenharia Elétrica
UFRJ
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11422/9425
Resumo: The present study proposes an alternative to the geotechnical instrumentation that uses inclinometers, aiming for a continuous and permanent solution, in order to quantify the ground movement, for example, from earth dams, landfill sites and slopes. A system based on optical sensors, Fiber Bragg Grating sensors, is proposed to achieve the goal of this study: a tube, with sensors installed along its length, capable of measuring its own profile, in other words, its bi-dimensional position in Cartesians coordinates. Potentially, the in-field deployment of this monitoring system – installation and commissioning – would be executed only once, minimizing or extinguishing the need of periodic interventions. An algorithm was developed with the purpose to rebuilding bi-dimensional curves from its curvature data, which are associated to the displacement profile of the tube instrumented by the optical sensors, and employing the Frenet-Serret equations. Real data from in-field monitoring measured by a slope indicator system (inclinometers) was used to assess the response of the developed algorithm. Moreover, laboratory tests were performed to simulate the methodology of the present study and to assess the performance of the entire monitoring system in a small-scale scenario.