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检索条件"机构=CPqD Research and Development Center in Telecommunications"

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Fiber optic bending loss sensor for application on monitoring of embankment dams

Fiber optic bending loss sensor for application on monitorin...

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2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2011

作者： Ribeiro, Livia A. Rosolem, Joao B. Dini, Danilo C. Floridia, Claudio Hortencio, Claudio A. Da Costa, Eduardo F. Bezerra, Edson W. De Oliveira, Rinaldo B. Loichate, Marcelo D. Durelli, Anderson S. CPqD - Research and Development Center in Telecommunications Campinas SP Brazil DME Distribuição S/A Poços de Caldas MG Brazil

ISBN: (纸本)9781457716621

We propose a fiber optic sensor system based on fiber bending loss and Optical Time Domain Reflectometry (OTDR) to application on monitoring of embankment dams. The sensing system was developed to monitor indirectly the water level penetration on the embankment dam by measuring the water pressure. The bend loss sensor performance was assessed concerning the number of fiber loops involved, the pump wavelength and temporal width of the pulse. Sensor system link is proposed to have a number of at least six sensors stages totally independent each other, in such a way that each stage can be developed to monitor a specific situation. In order to protect the sensor stage against environmental damage and to match the mechanical properties of the fiber and the water, we proposed a special packaging based on silicone rubber. © 2011 IEEE.

关键词： Water levels

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Passive optical network upgrading by using in-band WDM overlay

Passive optical network upgrading by using in-band WDM overl...

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2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2011

作者： Penze, Rivael Strobel Rosolem, João Batista Duarte, Ulysses Rondina Filho, Renato Baldini Convergence Network Department CPqD - Research and Development Center in Telecommunications Campinas SP Brazil Electrical Engineering Department University of Campinas Campinas SP Brazil

ISBN: (纸本)9781457716621

This paper presents a new approach to upgrade the current passive optical network (PON) by using wavelength division multiplexing (WDM) in the standardized optical grid of gigabit PON (In-band WDM PON overlay). The aim is to increase the number of optical distribution networks (ODNs) fed by a single fiber while preserving the users bandwidth. In this approach four downstream (DS) wavelengths signals are transmitted from an optical line terminal (OLT) to four different ODNs using the standard DS PON spectrum ranging from 1480 to 1500 nm. The upstream (US) signals from the four different ODNs are also wavelength multiplexed within the standardized US PON spectrum ranging from 1270 to 1330 nm. Proofs of concept are presented in a 20 km PON serving 32 ONTs in order to demonstrate the feasibility of this proposal. © 2011 IEEE.

关键词： Passive optical networks

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Deployment of IPv6 testbed in a research network with GPON access technology

Deployment of IPv6 testbed in a research network with GPON a...

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International Conference on Ultra Modern telecommunications and Workshops (ICUMT)

作者： J.F. Pozzuto J.O. Tognolli L. Martins M.A.B. Sanches N.S. de A. Chaves CPqD - Research and Development Center in Telecommunications Campinas SP Brazil

This paper presents the implementation of an IPv6 Testbed performed on the Experimental Network of GIGA Project and some experimental results, where the use of IPv6 integrated to current and emerging technologies used in LAN, MAN and WAN -10 Gigabit Ethernet, DWDM and GPON was tested. These protocols and technologies are part of a brand new technological scenario that has great perspectives to be more and more adopted in the coming years.

关键词： Passive optical networks Optical fibers Wavelength division multiplexing Routing protocols Optical switches

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80 km extended gigabit passive optical network

80 km extended gigabit passive optical network

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2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2011

作者： De Paiva, G.E.R. Freire, M.M. Duarte, U.R. Sassi, A.B. Bizetti, A.C. Pozzuto, J.F. Rosolem, J.B. Romero, M.A. Convergence Network Department CPqD - Research and Development Center in Telecommunications Campinas SP Brazil Department of Electrical Engineering University of Sao Paulo São Carlos SP Brazil

ISBN: (纸本)9781457716621

This work describes the experimental demonstration of a 80 km-reach PON system, with a 1:128 split ratio, using a conventional Gigabit-Capable Passive Optical Network (GPON) equipment. The experiment was made possible by the use of bidirectional 1310/1490 nm semiconductor optical amplifiers (SOAs) as well as by a change on the medium access control (MAC) protocol. Results for packet-loss ratio and power budget are given as a function of split ratio and network reach of a field-trial PON. © 2011 IEEE.

关键词： Semiconductor optical amplifiers

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A WDM-PON implementation employing spectrum sliced ASE source, dispersion management and PIN receivers

A WDM-PON implementation employing spectrum sliced ASE sourc...

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2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2011

作者： Duarte, U.R. De Paiva, G.E.R. Pereira, F.R. Bezerra, E.W. Rosolem, J.B. Romero, M.A. Convergence Network Department CPqD - Research and Development Center in Telecommunications Campinas SP Brazil Department of Electrical Engineering University of Sao Paulo São Carlos SP Brazil

ISBN: (纸本)9781457716621

In this work we propose a novel wavelength division multiplexing passive optical network (WDM-PON) configuration. The system is based on a colorless optical source employing the injection of amplified spontaneous emission (ASE) into a reflective SOA (R-SOA). In addition, optical detection at the ONTs is carried out by PIN based receivers, without decision threshold level adjustment (DTLA). We investigated the system performance for four directly modulated 1.25 Gb/s channels at the C-band in the presence of chromatic dispersion and experimentally demonstrated error free operation for downstream traffic in a 20 km reach, with 1.0 dB penalty. © 2011 IEEE.

关键词： Passive optical networks

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Stationary lead-acid batteries remote monitoring system

Stationary lead-acid batteries remote monitoring system

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International Conference on telecommunications Energy (INTELEC)

作者： M. Fátima N.C. Rosolem Gilcinea Rangel Pessenti Raul Fernando Beck Glauco Ribeiro dos Santos Vitor Torquato Arioli Paulo Henrique O. Lopes CPqD Foundation - Telecommunications Research and Development Center Campinas SP Brazil Light Centra is Elétricas S. A Rio de Janeiro RJ Brazil CPqD Foundation-Telecommunications Research and Development Center Campinas Sao Paulo Brazil CPqD

This work describe the research to the development of a remote monitoring system to obtain premature failures diagnoses in stationary lead-acid batteries (flooded and valve regulated) by measurements of its internal resistance and voltage. All the management and analysis of these measurements are included as a new feature of the "Battery Management Software", presented at INTELEC 2010.

关键词： Temperature measurement USA Councils Servers IP networks Security Fires Maintenance engineering

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Lithium-ion batteries evaluation for telecommunication's stationary applications

Lithium-ion batteries evaluation for telecommunication's sta...

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International Conference on telecommunications Energy (INTELEC)

作者： M. Fátima N.C. Rosolem Glauco Ribeiro dos Santos Rodrigo Samuel Nazari Alexandre Pinhel Soares Vitor Torquato Arioli Marcos Roberto dos Santos Raul Fernando Beck Kaue Tebaldi Miranda Luiz Eduardo F. Dias CPqD Foundation - Telecommunications Research and Development Center Road Campinas SP Brazil CPqD Foundation - Telecommunications Research and Development Center Rod. Campinas - Mogi-Mirim km 118.5 - CEP: 13086-902 SP Brazil Furnas Centrais Elétricas S.A. Rio de Janeiro RJ Brazil

This work describes the studied for evaluation the use the lithium-ion battery at stationary applications in electric power substations. The research was conducted with 14 lithium-ion batteries acquired in the international market from two different manufacturers: 4 batteries of manufacturer A (type A) and 10 of manufacturer B (type B). The electrical characteristics of battery type A are 42 Ah/48 V and the type B is 100 Ah/48 V. Tests were conducted to assess the electrical performance and safety.

关键词： Batteries Discharges

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Lithium-ion batteries evaluation for telecommunication's stationary applications

Lithium-ion batteries evaluation for telecommunication's sta...

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2011 33rd International telecommunications Energy Conference, INTELEC 2011

作者： Rosolem, M. Fátima N.C. Santos, Glauco Ribeiro Dos Nazari, Rodrigo Samuel Soares, Alexandre Pinhel Arioli, Vitor Torquato Santos, Marcos Roberto Dos Beck, Raul Fernando Miranda, Kaue Tebaldi Dias, Luiz Eduardo F. CPqD Foundation Telecommunications Research and Development Center Rod. Campinas - Mogi-Mirim km 118.5 CEP: 13086-902 Campinas - SP Brazil Furnas Centrais Elétricas S. A Real Grandeza St. 219 Botafogo - CEP 22.281-900 Rio de Janeiro - RJ Brazil

ISBN: (纸本)9781457712494

This work describes the studied for evaluation the use the lithium-ion battery at stationary applications in electric power substations. The research was conducted with 14 lithium-ion batteries acquired in the international market from two different manufacturers: 4 batteries of manufacturer A (type A) and 10 of manufacturer B (type B). The electrical characteristics of battery type A are 42 Ah / 48 V and the type B is 100 Ah / 48 V. Tests were conducted to assess the electrical performance and safety. © 2011 IEEE.

关键词： Lithium-ion batteries

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Stationary lead-acid batteries remote monitoring system

Stationary lead-acid batteries remote monitoring system

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2011 33rd International telecommunications Energy Conference, INTELEC 2011

作者： Rosolem, M. Fátima N.C. Pessenti, Gilcinea Rangel Beck, Raul Fernando Santos, Glauco Ribeiro Dos Arioli, Vitor Torquato Lopes, Paulo Henrique O. CPqD Foundation Telecommunications Research and Development Center Rod. Campinas - Mogi-Mirim km 118.5 CEP: 13086-902 Campinas - SP Brazil Light Centrais Elétricas S. A Av. Marechal Floriano 168 - 4 andar Centro - CEP 20080-002 Rio de Janeiro - RJ Brazil

ISBN: (纸本)9781457712494

关键词： Monitoring

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Stationary lead-acid batteries maintenance management system

Stationary lead-acid batteries maintenance management system

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International Conference on telecommunications Energy (INTELEC)

作者： M. Fátima M Fátima N C Rosolem Gilcinea Rangel Pessenti Luiz Eduardo F. D. Júnior Glauco Ribeiro dos Santos Pamela Tobias Frare Raul Fernando Beck Vitor Torquato Arioli Paulo Henrique O. Lopes CPqD Foundation - Telecommunications Research and Development Center Rod. Campinas - Mogi-Mirim km 118.5 - CEP: 13086-902 SP Brazil Light Centrais Elétricas S. A Av. Marechal Floriano Rio de Janeiro – RJ Brazil CPqD Foundation Telecommunications Research and Development Center Campinas – SP Brazil

This work describes a study to obtain premature failures diagnoses in stationary lead acid batteries (flooded and valve regulated) by measurements of its internal resistance. The main goal was to obtain a methodology to estimate the future conditions of the batteries and replace then before failures. To achieve this goal we planned and executed some accelerated aging tests in different models of flooded and VRLA batteries used by LIGHT in cpqd's Batteries Laboratory. By analyze of the records, was developed a mathematical algorithm to predict the state of degradation of 2 V lead acid flooded and VRLA batteries for the next 24 months. From this prediction algorithm, based on conductance and/or impedance measurements, was developed a software implemented in WEB, JAVA language and SQL Server Database.

关键词： Battery management systems Prediction algorithms Valves Electrical resistance measurement Battery charge measurement Accelerated aging Testing Laboratories Algorithm design and analysis Degradation

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