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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.
71

Camera Node for Conical Volumetric Surveillance

zhang, zhennan January 2014 (has links)
Generally  cameras  are  used  for  area  based  surveillance,  but  with  advancement  in  technology, cameras  can  be  employed  for wide  area  space  surveillance  (volumetric space surveillance). The volumetric systems require a number of cameras in order to cover a large area. Single panoramic cameras  do  not  provide  required  functionality  for  wide  area  space  surveillance  and Pan-Tile-Zoom (PTZ) cameras do not either cover wide areas.   To  meet  this challenge,  we  propose  a  cost  effective smart volumetric  surveillance system  which utilizes smaller number of cameras in order to provide a coverage of 360 degree. A test case used for this system includes detection of birds in the wind farms. The proposed approach provides a solution  for recording/preventing collision  of  birds  with  wind turbine. To  realize  the  system, a model is developed with two camera nodes. This model provides a 360 degree conical volumetric space coverage. The  system is  utilizing  a  servo  motor  with  capability  of  changing  speed  and arduino  embedded  platform for  controlling  different  functionality. After  triggering  the  camera nodes from arduino, software perform the image analysis.  This  cost  effective  and  wide  area  surveillance  system  consumes at  least half lower  power as compared  to traditional  linear  systems with  eight  cameras. It  is  worth  noting  that  the system provides  conical  shaped  area coverage  of  200  square  meters  with  height ranging  from approximately 40 to 100 meters. The system would capture images in raw format in local storage and  the test  results  show  that  saving  images  with  PNG  format  requires a small  memory  size  as compared  to BMP  and TIFF.    Experiment  results  indicate  that  surveillance  system  can  be effectively employed for detecting birds in opening places.
72

Diseño e implementación de una experiencia para talleres de introducción a la ingeniería

Garvs Martínez, Joshua Gunther January 2014 (has links)
Ingeniero Civil Eléctrico / La malla de Plan Común de ingeniería y ciencias de la Facultad de Ciencias Físicas y Matemáticas de la Universidad de Chile, determina que los estudiantes de primer año deben cursar las asignaturas de Introducción a la Ingeniería I y II, en las cuales desarrollan proyectos de ingeniería de forma grupal; diseñando, implementando y operando sus propias soluciones conforme a problemas escalables al quehacer de la ingeniería. La asignatura de Introducción a la Ingeniería es dictada en nueve secciones, conformadas por veinte grupos de cinco alumnos cada una, esta distribución está determinada por la Universidad y permite realizar un trabajo estructurado y sistemático. Se debe considerar que para la implementación de los proyectos de estas asignaturas de Ingeniería la Universidad dispone de recursos económicos y dedicación de tiempo limitados por alumno. En este Trabajo de Memoria se implementa el diseño de una experiencia para cursos de taller de introducción a la ingeniería II. Para ello se define un plan de trabajo, se diseñan los componentes mecánicos, eléctricos y computacionales, se confecciona el material de trabajo para ser utilizado durante el desarrollo de la experiencia y se define un plan piloto para la implementación de la actividad propuesta. La actividad definida para los alumnos consiste en el diseño, implementación y puesta en marcha (u operación) de un sistema de detección y transporte de carga que realiza un proceso cíclico controlado por una plataforma de desarrollo Arduino, que permite la manipulación de dispositivos electrónicos. Se mantiene el enfoque CDIO (Concebir, diseñar, implementar y operar) en el que se busca acercar el quehacer de la ingeniería, al estructurar una actividad en base a un problema concreto, para los alumnos, en la que se ponga a prueba sus conocimientos teóricos y sus habilidades. La propuesta concebida logra su objetivo y se mantiene dentro de los requerimientos y restricciones propios del curso de Introducción a la Ingeniería II.
73

Detection and velocity of a fast moving object

Gudipudi, Venkata Naga Manikanta Aditya January 2017 (has links)
Over a past few years, technology is constructing the way humans live. With the rapid growth towards Internet of Things (IOT) and other connected services, companies are investigating the ways to enhance current living conditions. There are several devices that are launched in the market to help people to increase flexibility and most of all, to see beyond what is possible. It is helping us reinforce ourselves in our day to day activities. Even in sports, thanks to the latest technological developments, most people’s lives have been enhanced and simplified. Advances in technology has a huge impact on sports which includes- analysis of sport performance, improvements in design of sports equipment and facilitate coaches to provide feedback on players’ performance. Sports equipment continually undergoing research and development to improve sporting performance ensuring a superior game and positive results. Significant technology such as smart gear is popular among athletes to analyse their performance. The equipment usually includes sensors controlled by microcontrollers. The main contribution of this thesis is to investigate the possibilities of a suitable sports equipment to detect and calculate speed of a fast-moving object and providing the drawbacks while using different sensors. In this thesis, IR/Laser sensors, along with a Doppler radar module were tested to put forward a best suitable method to calculate the speed of a fast-moving object and transmit the data over a network.
74

Construction, programming and testing of measurement equipment for microbe culturing in space : Contribution to the MOREBAC experiment, part of the MIST-project

Årling, Oscar January 2017 (has links)
Many different bacteria have essential roles in the process ofrecycling organic waste, making them useful tools when it comes toestablishing artificial ecosystems, a key technology to master inthe expansion of human space travel.In order to further investigate bacteria growth conditions duringspace travel, the MOREBAC experiment was formulated. The objectivewas to design an experimental setup and develop measurementequipment with the capability of confirming successfulresuscitation of freeze-dried bacteria in space by measuringbacteria growth, on-board the student-built MIST-satellite.The experimental setup prototype consisted of an acrylic chipwherein the bacteria would be placed during experiments and anoptical measurements configuration using a photosensor with thepurpose of detecting bacteria cell growth. For experimentalenvironment monitoring, a temperature sensor and a pressure sensorwere calibrated.An Arduino Nano microcontroller was programmed to control allelectrical components during measurements. During the opticaldensity measurements blue dyed water and E.coli bacteria innutrition media were used as test samples.Provided varying blue dye or bacteria cell concentrations, in theform of dilution series and growth-over-time-series, the equipmentproved capable of producing measurements that indicate the opticaldensity of the test sample.Furthermore, a prototype experiment protocol simulating eventsthat will occur in the final experiment design, was implementedand was able to produce real-time monitoring graphs of optical,temperature and pressure measurements, as well as documentation ofall events and measurement data. / MOREBAC / MIST
75

Low-cost implementation of Differential GPS using Arduino

Svaton, Martin January 2016 (has links)
The thesis proposes the low-cost solution of Differential GPS using Arduino as a Master Control Unit. The thesis provides the methods of GPS position augmentation, which is available for varied applications such as drones or autonomous lawnmowers operated in a private sector. Used methods of GPS positioning accuracy improvements are based on a Satellite-Based Augmentation System (SBAS) and pseudorange residuals.
76

Desenvolvimento de um aparelho de eletroencefalografia mobile de baixo custo

Otoni, Julliano da Silva January 2019 (has links)
Orientador: José Luiz Rybarczyk Filho / Resumo: O objetivo deste trabalho foi produzir um dispositivo coletor de biopotenciais por EEG de baixo custo. Como características o protótipo apresentou alta imunidade a ruído, faixa de frequência de trabalho e tensão, seguindo as especificações necessárias para a coleta dos sinais EEG. O circuito eletrônico e o roteamento foram desenvolvidos no software Eagle R e então a placa foi construída pelo método fotográfico com posterior corrosão por percloreto de ferro e solda-gem manual dos componentes. O circuito montado é composto por: amplificadores diferenciais configurados com um ganho na ordem de 169,66, filtros de frequência intercalados e um mi-crocontrolador ESP32@ que munido de conversor analógico-digital foi configurado para uma amostragem de 356 amostras por segundo e resolução de 12 bits, o que possibilitou leituras com passos de 2,198x10-4 V. Os filtros foram projetados para atuar na redução de ruidos contidos na faixa de 50 a 60Hz. O funcionamento do dispositivo móvel microcontrolado teve seu funciona-mento comprovado através do método de detecção de ondas alfa, ondas estas que alteram suas intensidade quando nos encontramos concentrados com os olhos abertos ou fechados. A captura de ondas alfa compreendidas entre 8 a 13 Hz foi validada nas seguintes condições: 1 minuto com os olhos fechados (alta atividade) e 1 minuto com os olhos abertos (baixa atividade). O dispositivo produzido mostrou-se promissor como uma alternativa de baixo custo e com simpli-cidade de produção, qu... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The objective of this work was to produce a low cost EEG biopotential collecting device. As characteristics the prototype presented high immunity to noise, working frequency range and voltage, following the specifications required for the collection of EEG signals. Electronic circuit and routing were developed in the Eagle R software and the plate was then constructed by the photographic method with subsequent iron perchloride corrosion and manual soldering of the components. The assembled circuit consists of: differential amplifiers configured with a gain of the order of 169.66, frequency filters interleaved and an ESP32 @ microcontroller which has an analog-to-digital converter configured for a sampling of 356 samples per second and resolution of 12 bits, which allowed for readings with steps of 2.198x10-4 V. The filters were designed to act in the reduction of noise contained in the range of 50 to 60Hz. The operation of the microcontrolled mobile device has proven its function through the method of detecting alpha waves, waves that change their intensity when we are concentrated with the eyes open or closed. The capture of alpha waves between 8 and 13 Hz was validated under the following conditions: 1 minute with eyes closed (high activity) and 1 minute with eyes open (low activity). The device produced was promising as a low-cost, simplified production alternative when compared to models available on the market for EEG signal capture. / Mestre
77

Development of an Arduino-based 3D printed 6DOF robotic phantom and a MATLAB-based software for Radiation Therapy Quality Assurance

Unknown Date (has links)
Quality Assurance (QA) for medical linear accelerators (linac) is the primary concern in external beam radiation therapy. In this research, we have developed a MATLAB-based software named Quality Assurance for Linacs (QALMA), which is unique, due to cost-effectiveness, user friendly interface, and customizability. It includes five modules to perform different QA tests: Star Shot analysis, Picket Fence test, Winston-Lutz test, MLC log file analysis, and verification of light & radiation field coincidence. We also pay attention to quality assurance of 6DOF treatment couch that plays a very important role in radiation therapy. We developed an Arduino based 3D printed 6DOF robotic phantom to check the accuracy of the treatment couch. This robotic phantom was experimentally validated under clinical standards, and customizable upon requirements of the quality assurance Task. The current features of this robotic phantom open development opportunities beyond the specific couch application, such as organs motion simulation. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2018. / FAU Electronic Theses and Dissertations Collection
78

Desenvolvimento de sistema para monitoramento de estruturas com utiliza??o da plataforma arduino

Silva, Jo?o Batista Lamari Palma 09 October 2018 (has links)
Submitted by SBI Biblioteca Digital (sbi.bibliotecadigital@puc-campinas.edu.br) on 2018-12-12T11:03:02Z No. of bitstreams: 1 Joao Batista Lamari Palma e Silva.pdf: 6384826 bytes, checksum: 7f07e131301eff9f4bf2ddb19d173b2b (MD5) / Made available in DSpace on 2018-12-12T11:03:02Z (GMT). No. of bitstreams: 1 Joao Batista Lamari Palma e Silva.pdf: 6384826 bytes, checksum: 7f07e131301eff9f4bf2ddb19d173b2b (MD5) Previous issue date: 2018-10-09 / The structures of reinforced concrete, although extremely diffused, require special attention from its conception, utilization its operation. This kind of attention could contribute for developing more useful time of usage, as since, the pathologies could be most varieties in complexes conditions, and so far is to analyze the integrity of the complexity of the structural condition. Structural Heart Monitoring (SHM) seeks the process of monitoring the behavior of the structure in order to assess the structure's conditions verifying the occurrence of damages and eventually in case of need for interventions, aiming at structural rehabilitation. The automated SHM uses data acquisition which acts as an interface between the sensors installed in the structures and the computational systems could be very complex and expensive. This work had the initiative to use the Arduino platform, which one is an electronic prototyping system, which uses an Atmel microcontroller, free hardware and software, with Analog/Digital inputs and outputs, low cost and relative ease of operation. The objective of this research was the development of a structure monitoring system, based on data collection from strain, displacement and force sensors, on reinforced concrete structures, for the acquisition and remote transmission of data, for processing and analysis of information. A data acquisition system was built with the Arduino platform, and this system has been used besides the platform in question, signal amplifiers and Wheatstone Bridge type circuits. A mobile application as a type of software has been developed, compatible with the Android operating system, through a smartphone or tablet, it was possible to control the Arduino through wireless communication via Bluetooth. This application sends and receives data, which is processed and analyzed analytically and graphically, resulting from the information of the sensors installed in the structures, which enables the transmission of the data in real time, via the internet. This system was tested in bending tests of metallic cantilever and reinforced concrete beams, instrumented with electric resistance strain gauges installed in the reinforcement and concrete, as displacement transducers and load cells. In addition to this structure, the system was also tested on a reinforced concrete column supporting a crane, with the installation of strain gauges in the reinforcement. In these tests, the data acquisition was made by two different systems, the first one being a commercial data acquisition purchaser and the second the system object of this research, to compare the data of the readings, obtained between both equipment and analytical values, establishing satisfactory results. / As estruturas de concreto armado, ainda que extremamente difundidas, requerem especial aten??o desde sua concep??o at? sua utiliza??o. Esta aten??o pode ser usada para contribuir com o aumento de sua vida ?til, j? que as patologias podem ser das mais variadas naturezas e causas, o que em muitas vezes torna a an?lise das condi??es de integridade estrutural muito complexa. O Monitoramento da Integridade Estrutural (MIE) busca acompanhar o comportamento da estrutura, para avaliar suas condi??es, inclusive para verificar a ocorr?ncia de danos e das eventuais necessidades de interven??es, visando a reabilita??o estrutural. O MIE automatizado emprega aquisitores de dados que atuam como interface entre os sensores instalados nas estruturas e os sistemas computacionais, tornando sua utiliza??o complexa e cara. Este trabalho teve por iniciativa empregar a plataforma Arduino, que ? um sistema de prototipagem eletr?nica, que utiliza um microcontrolador Atmel, de hardware e software livres, com entradas e sa?das anal?gicas/digitais, de baixo custo e relativa facilidade de opera??o. Com isto, o objetivo da pesquisa foi o desenvolvimento de um sistema de monitoramento de estruturas, baseado em coleta de dados provenientes de sensores de deforma??o, deslocamento e for?a, em estruturas de concreto armado, para aquisi??o e transmiss?o remota de dados, para processamento e an?lise das informa??es. Foi constru?do um sistema de aquisi??o de dados, com a plataforma Arduino, sendo que este sistema emprega al?m da plataforma em quest?o, amplificadores de sinais e circuitos el?tricos do tipo Ponte de Wheatstone. Desenvolveu-se um software do tipo aplicativo mobile, compat?vel com o sistema operacional Android, para que por meio de um smartphone ou tablet, fosse poss?vel controlar o Arduino, mediante comunica??o sem fio via Bluetooth. Este aplicativo envia e recebe dados, que s?o processados e analisados anal?tica e graficamente, decorrentes das informa??es dos sensores instalados nas estruturas, o qual possibilita a transmiss?o dos dados em tempo real via internet. O sistema foi testado em ensaios de flex?o de l?minas met?licas e vigas de concreto armado, instrumentadas com extens?metros de resist?ncia el?trica instalados na armadura e no concreto, como transdutores de deslocamento e c?lulas de carga. Al?m desta estrutura, o sistema tamb?m foi testado em um pilar de concreto armado de sustenta??o de uma ponte rolante, com a instala??o de extens?metros na armadura. Nestes testes, a aquisi??o de dados foi feita por dois sistemas distintos, sendo o primeiro um aquisitor de dados comercial de refer?ncia e o segundo o sistema objeto desta pesquisa, para compara??o dos dados das leituras obtidas entre ambos equipamentos e valores anal?ticos, tendo sido obtidos resultados satisfat?rios.
79

Mechano-Magnetic Telemetry For Urban Infrastructure Monitoring

Orfeo, Daniel Jerome 01 January 2018 (has links)
Many cities seek utilities monitoring with centrally managed Internet of Things (IoT) systems. This requires the development of numerous reliable low-cost wireless sensors, such as water temperature and flow meters, that can transmit information from subterranean pipes to surface-mounted receivers. Traditional radio communication systems are either unable to penetrate through multiple feet of earthen and manmade material, or have impractically large energy requirements which necessitate either frequent replacement of batteries, or a complex (and expensive) built-in energy harvesting system. Magnetic signaling systems do not suffer from this drawback: low-frequency electromagnetic waves have been shown to penetrate well through several feet of earth and water. In the past, these signals were too weak for practical use; however, this has changed with the recent proliferation of high-sensitivity magnetometers and compact rare-earth magnets. A permanent magnet can be either rotated or vibrated to create an oscillating magnetic field. Utilizing this phenomenon, two types of magnetic transmitter are investigated in this study: one which uses a propeller to directly rotate a diametrically magnetized neodymium magnet; and a second in which a permanent magnet is oscillated back-and-forth across a novel soft-magnet Y-stator, which projects a switching magnetic field. In principle, these oscillating magnetic fields can be used for communication from subterranean infrastructure sensors—such as flow meters and leak detection devices—to an aboveground long range (LoRa) radio-networked Arduino receiver equipped with a magnetometer. Simulation software models the oscillating electromagnetic fields produced by the Y-stator configuration. Laboratory performance and field tests establish the capability of two IoT-linked leak-detection sensors that use magnetic telemetry. Remote datalogging demonstrates the viability of integrating many sensors and surface receivers into a single LoRa wireless IoT network.
80

Design of an Advanced Lighting Measurement System for Roadway Safety

Johnson, Mathew 01 January 2013 (has links)
Roadway illumination is a vital component of safety while driving during the night. There are regulations in place to ensure all publicly maintained roads are properly lit, but the validation process is too time consuming, costly, and dangerous for adequate data collection studies. The work in this thesis is aimed toward remedying this problem by creating an Advanced Lighting Measurement System (ALMS) capable of recording illumination readings while traveling at normal driving speeds. This solution is based on the Arduino Uno development board, a cost effective yet powerful embedded platform. This thesis involves collecting data along 100 centerline miles of Florida roadways and converting the resulting illumination readings into GIS format, allowing them to be included in the roadway database of the Florida Department of Transportation (FDOT). By including this data FDOT will be able to repair poorly lit corridors and will be aware of possible safety concerns. The illumination values recorded by the ALMS have been validated and verified as an accurate replacement for conventional lighting measurement system.

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