Electronic And Instrumentation
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. INSTRUMENTAÇÃO PARA PILHAS DE CÉLULAS A COMBUSTÍVEL DO TIPO PEM VISANDO A EFICIÊNCIA ENERGÉTICA / INSTRUMENTATION FOR PROTON EXCHANGE MEMBRANE FUEL CELLS AIMING AT ELECTRICAL EFFICIENCY
Esta dissertação refere-se ao desenvolvimento de um sistema de monitoramento, acionamento e controle de uma pilha de células a combustível (CaC) do tipo PEM e de seu equipamento auxiliar. A primeira etapa deste trabalho é relacionada à modelagem da CaC e a segunda refere-se à instrumentação eletrônica para obtenção de dados práticos da pilha. Pa
Publicado em: 2009
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14. Study of metrological dispersions in Mulltilayer Perceptrons, one type of artificial neural networks, through calibration curve application. / Estudo das dispersões metrológicas em redes neurais artificiais do tipo Multilayer Perceptrons através da aplicação em curvas de calibração.
The present study investigates metrological dispersions in fitting partially or totally unknown functions. An alternative method is the application of a multilayer perceptron neural network used here to fit functions. The fitting functions are calibration curves from calibration indications of measurement systems or instruments. These curves hold metrologica
Publicado em: 2009
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15. InstrumentaÃÃo para espectroscopia de modos Ãpticos com alto fator de qualidade em microesferas de sÃlica
Neste trabalho, realizou-se a instrumentaÃÃo eletrÃnica de um laser de diodo sintonizÃvel com cavidade estendida para espectroscopia no visÃvel dos automodos de microesferas de sÃlica. Para isto, à desejÃvel desenvolver uma fonte de luz sintonizÃvel por alguns GHz, apresentando uma largura de linha mÃxima de 1 MHz, jà que o intervalo espectral liv
Publicado em: 2009
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16. On the use of unmanned aerial vehicle and the development of a data acquisition system of law cost for atmospheric sounding / Utilização de veículos aéreos não tripulados e desenvol-vimento de um sistema de aquisição de dados de baixo custo para sondagem atmosférica
This work describes the construction of an unmanned aerial vehicle (UAV) with electrical propulsion and instrumentation in order to obtain the vertical and horizontal profiles by measuring temperature, pressure, and GPS location, in surface atmosphere layer between two heterogeneous surfaces near terrain. Using embedded electronic, one developed and built a
Publicado em: 2008
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17. Sistemas para manipulação quantica em estado solido / Towards an implementation of quantum manipulation in solid states
This thesis proposes and implements a system for quantum information processing, focusing primarily on the associated instrumentation. The basic physical aspects for computation, such as the associated energy and Shannon s entropy, were revisited. InAs:GaAs quantum dots were elected as the physical system of choice for this implementation; in particular, the
Publicado em: 2008
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18. Development of a ground support equipment for electronic tests of the multispectral imager from CBERS satellite / Desenvolvimento de equipamento de testes eletrônicos para câmera multiespectral do satélite CBERS
This work presents the development of an equipment for electronic tests, GSE (Ground Support Equipment), in system and subsytem levels of the multispectral imager from CBERS3&4 satellite, the first camera for space applications developed in the country. This project was developed using a reference model for mechatronic products development. GSE utilizes virt
Publicado em: 2007
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19. AnÃlise, projeto e implementaÃÃo de reatores eletrÃnicos para acionamento de lÃmpadas de alta intensidade em descarga "AID", controlados por circuitos de lÃgica reconfigurÃvel "FPGA"
Programmable logic devices were introduced about fifteen years ago and nowadays they are used in areas like Telecommunications, Instrumentation and more recently Power Electronics. This work presents the application of an FPGA device in the control of a ballast circuit for driving high intensity discharge lamps. The electronic ballast presents improvements r
Publicado em: 2007
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20. Desenvolvimento de sistemas portáteis de monitoramento eletroquímico. / Development of portables electrochemical monitoring systems.
This work presents the development of two different portable electrochemical detection systems. Both systems are applicable in environment and biomedical areas. The electrochemical detection techniques have many interesting advantages, when compared to other detections techniques, such as good sensitivity, good selectivity, and low maintenance cost. The dete
Publicado em: 2007
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21. Instrumentação inteligente via web services. / Intelligent instrumentation through web services.
In this work is presented the integration of an established system of intelligent instrumentation with the Web Service?s architecture, in accordance with the IEEE 1451.1 standard. It is suggested the association of a data-communication protocol with the concept of Transducer Electronic Data Sheet (TEDS) to a Web Service for making possible the remote configu
Publicado em: 2006
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22. Ferramentas aplicadas no desenvolvimento de laboratorio remoto e/ou presencial no ensino de engenharia eletronica / Tools applied in the development of remote or local laboratory to electronic engineering learning
This paper presents the results obtained from the elaboration of a modular system used for conducting experiments on electronics teaching via a computer network. This is an infrastructure proposal based on remote instrumentation and its main goal is developing a multi-user remote laboratory whose access occurs via local and/or Internet, with a friendly inter
Publicado em: 2006
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23. Optical voltage transformers using white light interferometry for high voltage measurements. / Transformador óptico por interferometria de luz branca para medição de altas tensões.
A new approach to perform measurement of potentials in high voltage levels using electrooptical Pockels sensors is presented here. This work describes an application of the White Light Interferometry technique to a high voltage optical fiber measurement system. In this system the information is encoded in the spectrum of the light, allowing the measurement t
Publicado em: 2006
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24. Estudo teÃrico-experimental de localizadores apicais eletrÃnicos / Electronic apical locators: theoretical and experimental studies
Este trabalho apresenta o projeto, a implementaÃÃo e testes de um novo protÃtipo de localizador apical eletrÃnico (LAE). LAEs sÃo aparelhos utilizados na odontometria, ou seja, na determinaÃÃo do comprimento de trabalho (CT). O CT delimita a profundidade que os instrumentos devem alcanÃar durante o tratamento do canal, e sua correta determinaÃÃo Ã
Publicado em: 2006