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Made available in DSpace on 2015-03-03T13:59:44Z (GMT). No. of bitstreams: 1 GabriellJMA_DISSERT.pdf: 1371633 bytes, checksum: 92e16086f0ca63a45223381e044469ad (MD5) Previous issue date: 2012-03-05 / In February 2011, the National Agency of Petroleum, Natural Gas and Biofuels (ANP) has published a new Technical Rules for Handling Land Pipeline Petroleum and Natural Gas Derivatives (RTDT). Among other things, the RTDT made compulsory the use of monitoring systems and leak detection in all onshore pipelines in the country. This document provides a study on the method for detection of transient pressure. The study was conducted on a industrial duct 16" diameter and 9.8 km long. The pipeline is fully pressurized and carries a multiphase mixture of crude oil, water and natural gas. For the study, was built an infrastructure for data acquisition and validation of detection algorithms. The system was designed with SCADA architecture. Piezoresistive sensors were installed at the ends of the duct and Digital Signal Processors (DSPs) were used for sampling, storage and processing of data. The study was based on simulations of leaks through valves and search for patterns that characterize the occurrence of such phenomena / Em fevereiro de 2011, a Ag?ncia Nacional de Petr?leo, G?s Natural e Biocombust?veis (ANP) publicou o novo Regulamento Tecnico de Dutos Terrestres para Movimenta??o de Petr?leo, Derivados e Gas Natural (RTDT). Entre outros aspectos, o RTDT tornou obrigat?rio o emprego de sistemas de monitoramento e detec??o de vazamentos em todos os dutos terrestres do pa?s. Este documento traz um estudo sobre o m?todo de detec??o por transiente de press?o. O estudo foi realizado num duto industrial de 16" de di?metro e 9,8 Km de extens?o. O duto e totalmente pressurizado e transporta uma mistura multif?sica de ?leo bruto, ?gua e g?s natural. Para a realiza??o do estudo, foi constru?da uma infraestrutura de aquisi??o de dados e valida??o de algoritmos de detec??o. O sistema foi concebido com arquitetura SCADA. Sensores piezoresistivos foram instalados nas extremidades do duto e Processadores Digitais de Sinais (DSPs) foram usados para a amostragem, armazenamento e processamento dos dados. O estudo se baseou na realiza??o de simula??es de vazamentos por meio de valvulas e busca por padr?es que caracterizassem a ocorr?ncia de tais fen?menos

The project considers realization system, which will allow us to test six different operation modes on lifetime accumulators. The system will link to computer, which will execute measurement current and tension and switch betwencharging and discharging modes. The measured values will record in someone time intervals in to computer memory. After someone time will analise these measured valuer and will provide optional operation mode.

This thesis describes the design of the active load for adjusting the maximum power point of PV module and the module loaded with the defined parameters for measuring the effectiveness and identifying the characteristics of the PV module.

L’expérience SuperNEMO est conçue pour la recherche de la double désintégration bêta (ββ) sans émission de neutrinos impliquant un neutrino de Majorana (ν ≡ ν̄) massif. Le module démonstrateur de l’expérience est actuellement en cours d’installation au Laboratoire Souterrain de Modane (LSM). La technique de détection utilisée, dite tracko-calo, permet la mesure en énergie des particules traversant le détecteur ainsi qu’une reconstruction complète de leur cinématique.Cette thèse présente la conception, la simulation et l’implémentation d’un système de déclenchement de l’électronique pour le module démonstrateur de SuperNEMO. Le but de ce système est de maximiser l’efficacité de détection pour des évènements ββ ainsi que pour des évènements dits de bruits de fond issus de la radioactivité naturelle tout en réduisant le taux d’acquisition pour des évènements d’autodéclenchement des détecteurs. Un ensemble d’algorithmes de reconnaissances de traces et d’association calorimètre–trajectographe a été développé et implémenté dans les cartes électroniques après validation par des simulations Monte-Carlo. Les objectifs de performance ont été atteints en prenant en compte les différentes contraintes (physique des détecteurs, électronique, temps réel) maximisant les efficacités de détection pour des évènements d’intérêt physique. / The SuperNEMO experiment is designed for the neutrinoless double beta decay (ββ) research involving a massive Majorana neutrino (ν ≡ ν̄). The demonstrator module of the experiment is currently being installed at the Laboratoire Souterrain de Modane (LSM). The so-called tracko-calo detection technique allows the energy measurement of the particles passing through the detector and a complete reconstruction of their kinematics.This thesis presents the design, simulation and implementation of the electronics trigger system for the SuperNEMO demonstrator module. The purpose of this system is to maximize the detection efficiency for ββ events as well as for background events due to natural radioactivity while reducing the acquisition rate caused by spurious events. Pattern recognition and calorimeter-tracker association algorithms have been developed and implemented in electronic boards after validation by Monte-Carlo simulations. The performance targets have been reached, taking into account different constraints (physics of the detectors, electronics, real time) with maximized detection efficiency for events of interest.

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This dissertation describes the development, design, implementation and evaluation of a data acquisition system, with the main aim of using it for data collection on a laboratory pilot ball mill. An open-source prototype hardware platform was utilised in the implementation of the data acquisition function, however, with limitations. An analogue signal conditioning card has been successfully developed to interface the analogue signals to the dual domain ADC module. Model-based software development was used to design and develop the algorithms to control the DAS acquisition process, but with limited capabilities. A GUI application has been developed and used for the collection and storage of the raw data on the host system. The DAS prototype was calibrated and collected data successfully through all the channels; however, the input signal bandwidth was limited to 2Hz. / Electrical and Mining Engineering / M. Tech. (Electrical Engineering)

The recent trend in generating energy from the waves has led to several advancements in the methods and the various research is conducted across the world, to study the behaviour of point absorbers on the waves. The point absorbers such as wave buoys are designed to move according to the waves and the generator that is mechanically coupled with the buoys, generate electricity. But these buoys can also be used for measuring important parameters like the force acting on it due to the incident waves and their movement can be tracked to study the effects on the buoy due to the incident waves.  This project, as an extension of a previous work titled ‘Design and Development of a Measurement System to Track the Motion of a Point Absorber’ by Juliana Lüer, focuses on modifying and replacing the controller data acquisition and the communication system. The main aim is to increase the stability of the system and increasing the size of data storage and range of the data transmission. This is done in 3 steps that are as follows: - The Arduino based controller is replaced with an advanced Raspberry Pi based computer called RevPi Compact. - The Secure Digital (SD) card storage is replaced with a solid-state (Universal Serial Bus) USB memory stick with a large capacity. - The Radio Frequency (RF) based data transmission is replaced with a 4G (fourth generation) internet modem. The 60 W solar panels are retained from the previous project. But the Lead-Acid battery is replaced with two Lithium Polymer (Li-Po) batteries of 768 Wh capacity each. This increases the stability of the power source and enables the buoy to stay active for a longer time even when there is no useful solar irradiance for many days. There are two force transducers (strain gauge) to measure the line force and the angular force acting on the buoy. The Ellipse2-D Inertial Measurement Unit (IMU) from SBG systems is retained from the previous experiment. This sensor can track the Altitude and Heading Reference (AHRS) data along with the Global Positioning System (GPS) data with high levels of accuracy.  All the data collected are can be tracked instantaneously due to the 4G internet communication protocol and this is enabled by TelenorTM connection and HuaweiTM 4G modem. A copy of these data is also stored in a SanDisk USB memory of 500 GB capacity. The tests are carried out under the laboratory conditions and the outputs are as expected. The whole setup is to be installed in a metallic buoy and to be tested in the Lysekil test site in the future.

The traditional radiation testing of space electronics has been used for more than fifty years to support the radiation hardness assurance. Its typical goal is to ensure reliable operation of the spacecraft in the harsh environment of space. This PhD research looks into the radiation testing from a different perspective; the goal is to develop radiation testing methods that are focused not only on the reliability of the components but also on a continuous radiation-induced degradation of their performance. Such data are crucial for the understanding of the impact of radiation on the measurement uncertainty of data acquisition systems onboard research space missions.