Rancang Bangun Prototype Sistem Pendeteksi Kebocoran Gas dan Api Menggunakan Arduino

The Indonesian government conducted a household fuel conversion program in 2007 using LPG as a substitute for kerosene. LPG gas is the most widely used energy source for the people of Indonesia. Currently the quality of LPG gas cylinders tends to decrease. This quality degradation can occur due to lack of supervision during the production process, especially in the quality control process, so the use of LPG is quite dangerous with the potential to cause an explosion to fire. The aim of this research is to design and build a prototype of a gas and fire leak detection system using Arduino. The method used in this research is the prototype development method with the stages of listening to problems and customer needs, building a prototype, then the customer sees the prototype and tests it. The results of this study are tools that can detect LPG and fire gas leaks using an arduino microcontroller that can be accessed using a smartphone with an average response time to detect a fire of 4.43 seconds while to detect a gas of 4.18 seconds

Design and Implementation of the Firing Circuit of A SPWM Inverter Using Microcontroller

An inverter is the most important and basic device that converts DC electrical energy into AC. These inverters have variety of application in the field of power such as continuous power supply, motor drives (especially AC), etc. The inverters have a principal role in the field of conventional energy like since these play role in grid connected wind energy systems and Photovoltaic systems. The control strategies which are used in the inverters are similar to that used in DC-DC rectifiers. The inverters generally operate on the PWM techniques. The sinusoidal pule width modulation (SPWM) is the most popular technique used as gate pulse to the inverters now a days. There is various kinds of techniques to generate the SPWM. The SPWM switching signal is generated by different type of electronic boards such as FPGA’s and Audrino employing VHDL and coding languages such as C, C++, Python etc. This project is started by understanding the basic circuit of the inverter circuit employing SPWM switching signal. Here we will discuss the different SPWM generation techniques with the help of simple MATLAB SIMULATIONS, using on board microcontroller, ARDUINO UNO and LAB VIEW. And discuss the merit and demerits of various techniques. Furthermore we will also discuss the effect of the harmonics on the output voltage of the inverte

A sensor node soC architecture for extremely autonomous wireless sensor networks

Tese de Doutoramento em Engenharia Eletrónica e de Computadores (PDEEC) (especialidade em Informática Industrial e Sistemas Embebidos)The Internet of Things (IoT) is revolutionizing the Internet of the future and the way new smart objects and people are being connected into the world. Its pervasive computing and communication technologies connect myriads of smart devices, presented at our everyday things and surrounding objects. Big players in the industry forecast, by 2020, around 50 billion of smart devices connected in a multitude of scenarios and heterogeneous applications, sharing data over a true worldwide network. This will represent a trillion dollar market that everyone wants to take a share. In a world where everything is being connected, device security and device interoperability are a paramount. From the sensor to the cloud, this triggers several technological issues towards connectivity, interoperability and security requirements on IoT devices. However, fulfilling such requirements is not straightforward. While the connectivity exposes the device to the Internet, which also raises several security issues, deploying a standardized communication stack on the endpoint device in the network edge, highly increases the data exchanged over the network. Moreover, handling such ever-growing amount of data on resource-constrained devices, truly affects the performance and the energy consumption. Addressing such issues requires new technological and architectural approaches to help find solutions to leverage an accelerated, secure and energy-aware IoT end-device communication. Throughout this thesis, the developed artifacts triggered the achievement of important findings that demonstrate: (1) how heterogeneous architectures are nowadays a perfect solution to deploy endpoint devices in scenarios where not only (heavy processing) application-specific operations are required, but also network-related capabilities are major concerns; (2) how accelerating network-related tasks result in a more efficient device resources utilization, which combining better performance and increased availability, contributed to an improved overall energy utilization; (3) how device and data security can benefit from modern heterogeneous architectures that rely on secure hardware platforms, which are also able to provide security-related acceleration hardware; (4) how a domain-specific language eases the co-design and customization of a secure and accelerated IoT endpoint device at the network edge.Internet of Things (IoT) é o conceito que está a revolucionar a Internet do futuro e a forma como coisas, processos e pessoas se conectam e se relacionam numa infraestrutura de rede global que interligará, num futuro próximo, um vasto número de dispositivos inteligentes e de utilização diária. Com uma grande aposta no mercado IoT por parte dos grandes líderes na industria, algumas visões otimistas preveem para 2020 mais de 50 mil milhões de dispositivos ligados na periferia da rede, partilhando grandes volumes de dados importantes através da Internet, representando um mercado multimilionário com imensas oportunidades de negócio. Num mundo interligado de dispositivos, a interoperabilidade e a segurança é uma preocupação crescente. Tal preocupação exige inúmeros esforços na exploração de novas soluções, quer a nível tecnológico quer a nível arquitetural, que visem impulsionar o desenvolvimento de dispositivos embebidos com maiores capacidades de desempenho, segurança e eficiência energética, não só apenas do dispositivo em si, mas também das camadas e protocolos de rede associados. Apesar da integração de pilhas de comunicação e de protocolos standard das camadas de rede solucionar problemas associados à conectividade e a interoperabilidade, adiciona a sobrecarga inerente dos protocolos de comunicação e do crescente volume de dados partilhados entre os dispositivos e a Internet, afetando severamente o desempenho e a disponibilidade do mesmo, refletindo-se num maior consumo energético global. As soluções apresentadas nesta tese permitiram obter resultados que demonstram: (1) a viabilidade de soluções heterogéneas no desenvolvimento de dispositivos IoT, onde não só tarefas inerentes à aplicação podem ser aceleradas, mas também tarefas relacionadas com a comunicação do dispositivo; (2) os benefícios da aceleração de tarefas e protocolos da pilha de rede, que se traduz num melhor desempenho do dispositivo e aumento da disponibilidade do mesmo, contribuindo para uma melhor eficiência energética; (3) que plataformas de hardware modernas oferecem mecanismos de segurança que podem ser utilizados não apenas em prol da segurança do dispositivo, mas também nas capacidades de comunicação do mesmo; (4) que o desenvolvimento de uma linguagem de domínio específico permite de forma mais eficaz e eficiente o desenvolvimento e configuração de dispositivos IoT inteligentes.This thesis was supported by a PhD scholarship from Fundação para a Ciência e Tecnologia, SFRH/BD/90162/201

Developing Techniques For Reducing Emc Effects On Microcontroller Based Medical Equipment

Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2007Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2007Biyomedikal EMC etkileriBiomedical EMC effectsYüksek LisansM.Sc

Control strategies for Brushless DC motors

Tato diplomová práce se zabývá strategiemi řízení, které jsou dostupné pro bezkartáčové DC motory, a které mohou být použity pro řízení rychlosti pohonů elektrických vozidel. Úkolem práce je studium rozličných řídicích algoritmů, nalezení způsobů, jak optimalizovat jejich výkon, a zároveň simulovat jejich chování pro ověření jejich vlastností. Závěrečná etapa práce spočívá v přípravě implementovatelného řídicího algoritmu, který je poté spuštěn na laboratorním stanovišti s aktivním řídicím systémem založeným na zpětné vazbě PID regulátoru a uživatelského rozhraní (HMI) pro snadnou interakci v průběhu testu.Master's Thesis researching the various control strategies available for BLDC motor control that can then be employed in the speed control of electric vehicle drive systems. The task involved studying the various control algorithms, finding ways to optimize their performance and simulate them as a proof of concept. The final stage of the thesis involved the preparation of an implementable control algorithm that was then run on a test bench with an active PID feedback-based control system and HMI for easy interaction in runtime

SCU Cube

Traditional forms of communication such as landlines and cell phones are unreliable during disaster scenarios. It is difficult to coordinate relief efforts in the aftermath of a disaster due to the unavailability of reliable communication methods. The SCUCube is a 3U CubeSat designed to aid disaster relief communications. The satellite has an amateur radio primary payload that can send and receive standardized data packets with compatible radios, and also has an experimental attitude control system secondary payload. The semi-passive attitude control system uses a gravity gradient boom and a reaction wheel to stabilize the orientation of the satellite. In addition, the satellite uses 3D printed and aluminum components for internal mounting features. The satellite also implements legacy work from previous Santa Clara University senior projects, including an outer structural design, a solar panel design, a distributed computing system, and an electronic power board design. SCUCube’s communication payload has demonstrated the capability to send and receive standard AX.25 data packets, as well as store messages for later downlink. Individual subsystems on the satellite have been designed, assembled and tested, and are currently integrated with one another in a ‘Flat satellite’ testing configuration. In addition, structural testing has been completed to determine if the system will survive launch. Before it may be launched, the satellite needs to be assembled in flight configuration and tested to ensure that subsystems behave as anticipated. SCUCube will provide vital communications services once it is launched, and will also test an experimental attitude control system