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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Ambiente computacional paradesenvolvimento de aplica??es de controladores l?gicos program?veis baseado em linguagens SFC e ST

Couto, Felipe C?sar Alves do 30 June 2009 (has links)
Made available in DSpace on 2014-12-17T14:08:34Z (GMT). No. of bitstreams: 1 FelipeCAC.pdf: 1359871 bytes, checksum: 241fcfb66da39be9d48445bc9f6d11de (MD5) Previous issue date: 2009-06-30 / This work proposes an environment for programming programmable logic controllers applied to oil wells with BCP type method of artificially lifting. The environment will have an editor based in the diagram of sequential functions for programming of PLCs. This language was chosen due to the fact of being high-level and accepted by the international standard IEC 61131-3. The use of these control programs in real PLC will be possible with the use of an intermediate level of language based on XML specification PLCopen T6 XML. For the testing and validation of the control programs, an area should be available for viewing variables obtained through communication with a real PLC. Thus, the main contribution of this work is to develop a computational environment that allows: modeling, testing and validating the controls represented in SFC and applied in oil wells with BCP type method of artificially lifting / Este trabalho prop?e um ambiente computacional para programa??o de controladores l?gicos program?veis aplicados aos po?os de petr?leo com m?todo de eleva??o artificial do tipo BCP. O ambiente ter? um editor para programa??o de PLCs baseado principalmente no diagrama de fun??es sequenciais (SFC). Esta linguagem foi escolhida por ser considerada de alto n?vel e por ser aceita pelo padr?o internacional IEC 61131-3. O uso destes programas de controle em PLCs reais ser? poss?vel com a utiliza??o de uma linguagem de n?vel intermedi?rio baseada na especifica??o TC6 XML pela organiza??o PLCopen. Para os testes e a valida??o dos programas de controle, dever? ser disponibilizada uma ?rea para visualiza??o das vari?veis obtidas atrav?s da comunica??o com um PLC real. Desta forma, a principal contribui??o deste trabalho ? desenvolver um ambiente computacional que permita: modelar, testar e validar os controles representados em SFC e aplicados nos po?os petrol?feros com m?todo de eleva??o artificial do tipo BCP
2

Desenvolvimento de um software de comunica??o sem fio aplicado ? instrumenta??o de unidade de eleva??o de petr?leo tipo Plunger Lift

Oliveira, Felipe Denis Mendon?a de 13 February 2009 (has links)
Made available in DSpace on 2014-12-17T14:55:35Z (GMT). No. of bitstreams: 1 FelipeDMO.pdf: 2614728 bytes, checksum: fd69e303891800912ab5260562a5545d (MD5) Previous issue date: 2009-02-13 / This dissertation aims to develop a software applied to a communication system for a wireless sensor network (WSN) for tracking analog and digital variables and control valve of the gas flow in artificial oil s elevation units, Plunger Lift type. The reason for this implementation is due to the fact that, in the studied plant configuration, the sensors communicate with the PLC (Programmable and Logic Controller) by the cables and pipelines, making any changes in that system, such as changing the layout of it, as well as inconveniences that arise from the nature of the site, such as the vicinity s animals presence that tend to destroy the cables for interconnection of sensors to the PLC. For software development, was used communication polling method via SMAC protocol (Simple Medium Access ControlIEEE 802.15.4 standard) in the CodeWarrior environment to which generated a firmware, loaded into the WSN s transceivers, present in the kit MC13193-EVK, (all items described above are owners of Freescale Semiconductors Inc.). The network monitoring and parameterization used in its application, was developed in LabVIEW software from National Instruments. The results were obtained through the observation of the network s behavior of sensors proposal, focusing on aspects such as: indoor and outdoor quantity of packages received and lost, general aspects of reliability in data transmission, coexistence with other types of wireless networks and power consumption under different operating conditions. The results were considered satisfactory, which showed the software efficiency in this communication system / Este trabalho tem por finalidade desenvolver um software aplicado a um sistema de comunica??o de uma rede de sensores sem fio (RSSF), para monitoramento de vari?veis anal?gicas, digitais e comando de v?lvulas de passagem do fluxo de g?s em unidades de eleva??o artificial de petr?leo e g?s natural do tipo Plunger Lift. A raz?o desta implementa??o deve-se ao fato que, na configura??o da planta estudada, os sensores comunicam-se com o CLP (Controlador L?gico Program?vel) atrav?s de cabos e dutos, dificultando eventuais modifica??es nesse sistema, tais como mudan?a de layout do mesmo, al?m de inconveni?ncias que venham a surgir da pr?pria natureza do local, como a presen?a de animais nas redondezas que tendem a destruir os cabos de interconex?o dos sensores ao CLP. Para o desenvolvimento do software, foi utilizado o m?todo de comunica??o polling, atrav?s do protocolo SMAC (Simple Medium Access Control - padr?o IEEE 802.15.4), no ambiente CodeWarrior, ao qual gerou um firmware, carregado nas placas de monitoramento da RSSF, presentes no kit MC13193-EVK, (todos os itens descritos acima s?o propriet?rios da Freescale Semiconductors Inc.). O monitoramento e parametriza??o da rede utilizou uma aplica??o, desenvolvida no software LabVIEW, da National Instruments. Os resultados foram obtidos atrav?s da observa??o do comportamento da rede de sensores proposta, focando aspectos, tais como: quantidade de pacotes recebidos e perdidos em ambientes externos (Outdoor) e internos (Indoor), aspectos gerais de confiabilidade na transmiss?o dos dados, coexist?ncia entre outros tipos de redes sem fio e consumo de energia sob diferentes condi??es de opera??o. Os resultados obtidos foram considerados satisfat?rios, o que comprovou a efici?ncia do software neste sistema de comunica??o
3

Estudo e especifica??o de um sistema de instrumenta??o para unidades de eleva??o de petr?leo utilizando tecnologia sem fio

Campos, Carlo Frederico Pereira de Siqueira 27 November 2006 (has links)
Made available in DSpace on 2014-12-17T14:56:21Z (GMT). No. of bitstreams: 1 CarloFPSC.pdf: 941846 bytes, checksum: 5fe2e2c9851039018a0653de693d001c (MD5) Previous issue date: 2006-11-27 / Wireless sensor networks are reality nowadays. The growing necessity of connectivity between existing industrial plant equipments pushes the research and development of several technologies. The IEEE 802.15.4 LR-WPAN comes as a low-cost and powersaving viable solution, which are important concerns while making decisions on remote sensoring projects. This study intends to propose a wireless communication system which makes possible the monitoring of analogic and/or digital variables (i. e., the pressure studied) involved on the artificial methods for oil and gas lifting. The main issues are: To develop a software based on SMAC Standard in order to create a wireless network to monitoring analogic and/or digital variables; To evaluate the communication link based on the number of lost packets tested in different environments (indoor and outdoor) and To propose an instrumentation system consisting of wireless devices / As redes de sensores sem fio (RSSS) j? s?o uma realidade hoje em dia, pois a grande necessidade de conectividade entre os equipamentos existentes numa planta industrial impulsiona a pesquisa e o desenvolvimento de diversas tecnologias. O padr?o LR-WPAN IEE 802.15.4 apresenta-se como uma solu??o vi?vel, com baixo custo e baixo consumo de energia, requisitos importantes para a implanta??o de um sistema de sensoriamento remoto. A contribui??o deste trabalho consiste em propor um sistema de comunica??o sem fio, que possa monitorar vari?veis anal?gicas e/ou digitais (no caso do estudo em quest?o, a press?o) nos m?todos de eleva??o artificial de petr?leo e g?s natural. Os pontos principais deste estudo s?o: Desenvolver um software baseado no Padr?o SMAC com intuito de criar uma rede sem fio com fins de monitoramento de vari?veis anal?gicas e/ou digitais; Avaliar o enlace de comunica??o com rela??o a quantidade de pacotes perdidos em diferentes ambientes (ambientes internos (Indoor) e externos (Outdoor)) e, Propor um sistema de instrumenta??o utilizando tecnologia sem fio

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