2012-10-102012-10-102012-07-09ATAÍDE, Rodrigo Williams Rodrigues. Projeto e implementação de um nodo sensor para aquisição de sinais de extensômetros em redes de sensores sem fio aplicado ao monitoramento de deformações em estruturas. Orientador: Aldebaro Barreto da Rocha Klautau Júnior. 2012. 69 f. Dissertação (Mestrado em Engenharia Elétrica.) - Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2012. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/3042. Acesso em:.https://repositorio.ufpa.br/handle/2011/3042This dissertation’s main objective is to propose a node wireless sensor for use in wireless sensor networks, in data strain gage acquisition systems. The acquisition system for the strain is based on the Wheatstone bridge and enables various settings. The processing and wireless communication is performed by ATmega128RFA1, composed of a microcontroller and a radio-frequency transceiver with the Zigbee standard. The node is designed to ensure reliability in data acquisition and be fully controlled remotely. Among the controllable parameters are: the signal gain and sampling rate. In addition, the node has resources to make the balance of the Wheatstone bridge automatically. The choice of components, based on criteria related to energy consumption and cost the same. It was designed a printed circuit board (PCB) for the node, and regarding it, estimates of energy consumption and value of the prototype were made, with the aim of analyzing its viability. Besides the design of the sensor node, the dissertation presents the proposal of its integration in a wireless sensor network (WSN), including the suggestion of complementary hardware and software developments. For testing, a node sensor was constructed experimentally and used a force transducer.porAcesso AbertoRede de sensores sem fioExtensômetros elétricosTecnologia ZigbeeMonitoramento de estruturasTransceptor de RadiofrequênciaPontes de WheatstoneInstrumentação eletrônicaWireless sensor networksElectric strain gagesWheatstone bridgeStructural health monitoringElectronic instrumentationData acquisition systemsDissertaçãoCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::TELECOMUNICACOESCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::ELETRONICA INDUSTRIAL, SISTEMAS E CONTROLES ELETRONICOS::AUTOMACAO ELETRONICA DE PROCESSOS ELETRICOS E INDUSTRIAIS