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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.
31

Klasická versus inteligentní elektroinstalace / Classical versus intelligent electrical installation

Haluza, Miroslav January 2010 (has links)
This work topic is development and history of intelligent wiring systems in Czech Republic as well as abroad. The firs paragraphs describe following: intelligent wiring systems, the differences between classic and intelligent wiring systems and consequently is described the intelligent wiring system itself (types, principles, advantages, disadvantages etc.). Detailed description of system Inels follows in the next chapters. This system is supposed to be the fundamental matter of this work and is used in consequent suggestions for intelligent wiring system that is defined at the end of the theoretical part of this work. At the conclusion the economic evaluation of various wiring options and assessment by the multicriteria analysis (MCA) will be provided.
32

Ekonomická efektivnost systémové elektroinstalace / Economic effectiveness of systems wiring

Jorda, Martin January 2009 (has links)
This master’s thesis tries to show the differences between usual obsolete indoor wiring and clas-sic indoor wiring used these days and also between this „classic“ indoor wiring and „intelligent wiring“. There is insisted on selection and optimalization of the adequate system for a concrete building and there is made a question of specifications of the user or the customer, his preferen-ces (financial, space, family etc.), disadvantages and advantages of the current system. Whereas it’s impossible to satisfy all the users in these problems by reason of diversity of the buildings (it can be a lot of variants of family houses or small apartments), the systems in this thesis are ap-plied only on the most frequent types of houses. Quite lot of firms deal in this country with indo-or wiring, the most known are ABB, ELKO EP and Moeller. Each of these firms offers different alternatives of systems. From the simplest, basic alternative, to most sophisticated „intelligent“ systems, which can care about almost everything, what is common with electrical energy. These different systems, their review, advantages and disadvantages are also presented in this work. Preliminary there is analysed the whole issue from the historical view and there is briefly explai-ned, what the system wiring is. In the next chapter there is a complex description of the actual state of known firms and systems on the present-day market in our country and in the world. The-re is also summarised the basic structure and the overall comparison of the most frequently used bus systems. In the next two chapters there are presented the main objectives of this work and the methods and procedures, how to achieve these objectives. The central part of this work is the next to last chapter, in which there are presented the different model variants of the project, applied to the real residential building - middle-sized family house. That is realized on the basis of the spe-cified requirements on the designed system. Before that there was performed the complex design of the situation scheme of all usual electrical appliances and lighting system in the house. In the end the whole work is in summary analysed, mainly in term of costs of each variant of the pro-ject. By virtue of this can the reader make a better view about the whole financial problem of the system wiring, that means, how much he has to invest in his concrete wiring. In the end of the work there is attached the detailed documentation to all alternatives of the project, such as dra-wings (complex horizontal plans) and costs budget of all used items and the wiring material.
33

Analysis of planar multi-conductor multilayered structures by network analog method

McVeety, Joseph J. 13 August 1999 (has links)
In this thesis the network analog method is used to analyze various planar multi-conductor structures in multilayered, lossy dielectric media. The method is based on an efficient impedance network representation of the finite difference approximation of Laplace's equation for the electric potential. Using the network analog method, the transmission line parameters are computed for several different uniform stripline structures in lossless and lossy multilayered dielectric material. The network analog method is also applied to several three-dimensional structures consisting of single and coupled conducting patches of rectangular shape. Results obtained with the network analog method for single conducting patches in single and multilayered lossless dielectric media are in good agreement with published results based on a variational approach. Further results presented in this thesis include the coupling capacitance for coplanar and multilevel patch configurations in lossless and lossy multilayered dielectric media. / Graduation date: 2000
34

Model-Based Intelligent Fault Detection and Diagnosis for Mating Electric Connectors in Robotic Wiring Harness Assembly Systems

Huang, Jian, Fukuda, Toshio, 福田, 敏男, Matsuno, Takayuki 02 1900 (has links)
No description available.
35

Fault-tolerant Mating Process of Electric Connectors in Robotic Wiring Harness Assembly Systems

Huang, Jian, Di, Pei, Fukuda, Toshio, 福田, 敏男, Matsuno, Takayuki 06 1900 (has links)
No description available.
36

Measurement of Narrowband Channel Characteristics in Single-Phase Three-Wire Indoor Power-Line Channels

SUGIURA, Yoshie, YAMAZATO, Takaya, KATAYAMA, Masaaki, 片山, 正昭 04 1900 (has links)
No description available.
37

Reliability investigation of printed wiring boards processed with water soluble flux constituents

Ready, William Judson, IV 14 July 2000 (has links)
The purpose of this research was to investigate the factors that enhance conductive anodic filament (CAF) formation in printed wiring boards. The variables studied were (1) flux formulation, (2) conductor spacing, (3) operating voltage, and (4) temperature. A Weibull distribution of failure times due to CAF was observed. A novel test circuit was designed and implemented that allowed the mean time to failure to be determined for boards processed with three different fluxes, at 0.5 mm and 0.75 mm conductor spacings and at 150V and 200V. The boards were aged at 85%RH and a temperature of 75°C, 85°C or 95°C. It was found that the flux formulation affected the rate of CAF formation. A modified linear aliphatic polyether flux with a chloride activator had a significantly different activation energy than control printed wiring boards or those boards processed with a poly(ethylene/propylene) glycol flux or a poly(ethylene/propylene) glycol flux with a bromide activator. The addition of bromine to a poly(ethylene/propylene) glycol flux decreased the rate of CAF formation as compared to poly(ethylene/propylene) glycol without a halide activator. The inter-relation between voltage and conductor spacing was quantified as a L4/V2 relationship for the plated through hole test pattern used in this study. 325V/mm was found to be a critical voltage gradient for the formation of CAF. The maximum temperature of the reflow profile also greatly enhances CAF formation and decreases the mean time to failure. Microscopic analysis showed distinct differences in CAF morphology between the various processed boards. Control boards had small halo-like CAF formations around a separated fiber / epoxy interface. CAF that formed on boards processed with poly(ethylene/propylene) glycol or poly(ethylene/propylene) glycol with a bromine activator had a stratified appearance that penetrated well into the epoxy. Boards that were processed with the modified linear aliphatic polyether with chlorine activator had a striated morphology that also penetrated into the epoxy. All CAFs were consistently copper and chlorine containing despite the use of a bromine containing flux. Electron diffraction revealed that a CAF observed in this study was synthetic atacamite. Stainless steel (i.e., iron, nickel, and chromium) residues were also observed as a result of drill bit breakage during PTH formation.
38

Objektová tvorba softwaru / Object-oriented software development

Maier, Stanislav January 2016 (has links)
The goal of my thesis was to develop an application in the selected object environment as firmware for single-chip computer. I created prototype of monitoring unit for greenhouses, with two controlled outputs, that would be accessible over the local network. Prototype was based on Arduino platform and from freely available components. Theoretical part of thesis describes the Arduino platform, Wiring language and environment and other used programing languages and communication standards. Practical part of thesis describes prototype of the monitoring unit with it's program code and client side web interface. At the end of thesis is the economic comparison of the developed prototype and existing equivalents on the market.
39

Implementation and evaluation of Bluetooth Low Energy as a communication technology for wireless sensor networks

Nilsson, Emil, Lindman, Tommy January 2017 (has links)
As the growth and enthusiasm for IoT increases, energy consumption and efficiency is of immense importance in order to develop maintainable and dependable sensor networks. In this thesis, we implement and evaluate a wireless sensor network using Bluetooth Low Energy (BLE) as the communication standard with regards to energy consumption and range capabilities. We found BLE to be a highly viable option for such systems, yielding long battery life for systems where long-range capabilities are not needed.
40

Control System for a Remote Electronics Laboratory / Styrning av elektronik distanslaboratorium

Rosen, Anders, Nilsson, Kristian January 2007 (has links)
The work done in this thesis has to do with the equipment server which has been upgraded with a new circuit wiring robot and a new voltage source and therefore needed new software. The main change were that the old circuit wiring robot, or matrix, were controlled via a IO card that were cumbersome to use and rather expensive, this was changed to a USB interface which is more generic and relatively easy to use. / Kristian Nilsson +46704443324 Anders Rosen +46705891352

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