The transition from fossil fuel-based energy sources involves exploring different sources of energy that can be reliably integrated into the power grid. One such existing resource is the CHPs, which are distributed throughout the US electric grid. The integration of the CHPs into the grid requires technological innovations. One idea is to design an F-CHP converter that would facilitate the CHPs to interconnect seamlessly with the electrical grid. This thesis presents the development and testing of different components of a testbed that would facilitate the testing of the F-CHP converter. It also presents the integration of a PMU and a communication interface for the F-CHP converter. The phasor estimation of the F-CHP PMU has been compared with a commercial PMU and its performance has been validated. / Master of Science / The transition from fossil fuel based energy sources involves exploring different sources of energy that can reliably integrated into the power grid. One such existing resource is the CHPs, that are distributed throughout the US electric grid. The integration of the CHPs into the grid required technological innovations. One idea is to design a power electronics converter that would facilitate the CHPs to connect with the electrical grid. This thesis presents the development and testing of different components of a testbed that would facilitate the testing of the converter. This work also integrates a technology for estimating the voltage and current at the point of interconnection between the converter and the electrical grid.

This report studies the possibility of using some sort of radio sender and transmitter in order to position skis lost in powder snow. It is concluded that a RF-solution on the 433 MHz frequency should be the most efficient. Different forms of directional antennas are examined and studies show that in theory the best suited is the so called “Yagi-Uda antenna”. A solution based on using a Receive Signal Strength Indicator value together with the above mentioned directional antenna is developed. To control these different components microprocessors from Atmel is used. These are programmed in C and compiled with Atmel’s own compiler AVR Studio. Despite all efforts it is proven that the prototype does not perform in an adequate way. An alternative solution based on “byte-loss-rate” is then developed and the results are slightly improved. Nevertheless, the directional properties of the antenna are still too poor why other alternatives are discussed. No fully functioning prototype is achieved but good grounds for further development of the prototype into something that fulfills the specifications are produced.

Syftet med föreliggande studie är att undersöka vilket motoralternativ som lämpar sig bäst för precis positionsstyrning av särskilda mätantenner, samt hur denna motor skall kunna drivas på ett funktionellt vis. Huvudresultatet som vill uppnås genom detta projekt är en generell motormodul kapabel att styra antennernas olika dimensioner utifrån användarens kommando genom seriell kommunikation från en PC. Studien har genomförts i samarbete med företaget Combitech AB.

Modern vehicles contain lots of Electronic Control Units (ECUs) that control different systems. They communicate with each other and other components through communication interfaces such as Controller Area Network (CAN) and Local Interconnect Network (LIN) buses or simple Universal Asynchronous Receiver/Transmitter (UART) interfaces. Testing of ECUs is an important part of the vehicle development process. Testing can be performed in multiple levels, where ECUs are first tested individually and communication with other ECUs is simulated. At a later stage, multiple ECUs are integrated and communicate autonomously with each other. Testing at a lower abstraction level with simulated systems gives the tester a lot more control and ability to test edge cases while testing at a higher abstraction level with real systems is more realistic. This thesis project investigates a new testing concept, where ECUs are partially simulated by modifying CAN messages that are sent between connected ECUs in real time to answer the research question ”Can better or easier testing of ECUs be enabled by combining concepts and tools from different levels of testing?”. This is done by developing two different testing tool prototypes. One based around a computer, the CANoe software and a Vector CAN interface. One consisting of an embedded system with a simple Human-Machine Interface (HMI). A method for minimizing delay for data injection in a UART interface using a Multiplexer (MUX) is also proposed, implemented and tested. Prototypes are developed and tested with both generated input data and with real systems at Scania. Developers and testers at Scania are also interviewed to get their opinions on the prototypes, the general concept and future use cases. The results indicate that the partial simulation concept has potential to be useful and lead to better or easier testing as well as development of ECUs. Some future work is suggested for further development of the prototypes as well as for additional research into the subject. / Moderna fordon innehåller många elektroniska styrenheter, så kallade ECUer, somstyr olika system. Dessa kommunicerar med varandra via olika gränssnitt såsom Controller Area Network (CAN)- och Local Interconnect Network (LIN)-bussar eller enklare Universal Asynchronous Receiver/Transmitter (UART)-gränssnitt. Testning av ECUer är en viktig del av utvecklingsprocessen för fordon. Testning kan utföras på flera nivåer, där ECUer först testas individuellt och kommunikation med andra ECUer simuleras. Senare integreras flera ECUer och kommunicerar autonomt med varandra. Testning på en lägre abstraktionsnivå med simulerade system ger testaren bättre kontroll över testerna och möjliggör att enkelt testa olika specialfall, medan testning på en högre abstraktionsnivå med riktiga system är mer realistisk. Detta examensarbete undersöker ett nytt testningskoncept, där ECUer simuleras partiellt genom att modifiera CAN-meddelanden som skickas mellan sammankopplade ECUer i realtid, för att svara på forskningsfrågan ”Kan bättre eller enklare testning av ECUer möjliggöras genom att kombinera koncept och verktyg från olika testnivåer?”. Detta görs genom att utveckla två olika prototyper för ändring av CAN-meddelanden. Den ena baseras på en dator, mjukvaran CANoe och ett CAN-interface från Vector. Den andra utgörs av ett inbyggt system med ett enkelt användargränssnitt. En metod för att minimera fördröjningen när data injiceras i ett UART-gränssnitt med hjälp av en Multiplexer (MUX) föreslås, implementeras och testas också. Prototyper utvecklas och testas både med genererad indata och med riktiga system på Scania. Utvecklare och testare på Scania intervjuas också för att samla in deras åsikter om prototyperna, det generella konceptet samt möjliga framtida användningsfall. Resultaten indikerar att partiell simulering som koncept har potential att vara användbart och leda till bättre eller enklare testning samt utveckling av ECUer. En del utökningar och ytterligare utveckling av de framtagna prototyperna föreslås tillsammans med förslag på ytterligare forskning inom området.

This thesis addresses the problem of wireless transmission between the operator station and the robot. There is a solution presented by way of testing the parameters of wireless modules, compare them in the environment and the draft protocol.

More and more embedded systems choose ARM-based micro-controllers as CPU. If no embedded OS built with the system, the application scope will be restricted. Therefore, the need of embedded OS is vital. There are many embedded OS¡¦s in the market, but the embedded Linux has many advantages and is widely accepted. Commercial embedded Linux takes less refund than other embedded OS¡¦s. The kernel and most applications are distributed in GPL open source copyright, and is highly portable to many machine platforms. Presently, the hardware key-technology is highly skilled. The margin of 3C industrial has gone down rapidly. Therefore, people focus on adapting integrated technology to practicality and innovation to make cost down. Developers choose appropriate ARM micro-controllers according to demanding functionality of their products. The microcontroller is not necessary running with Linux distribution. Two approaches can be used to resolve the embedded OS issue. The first approach is porting Linux to the platform without any refund. The second approach is to pay for commercial Linux. Embedded system peripheral devices aim at powerful functionalities and economy. For instance, UART interface is cheap and low data transfer rate. The target board communicates with host via RS-232. RS-232 acts as serial console to play dumb terminal under Linux. Industrial applications often make use of RS-xxx for UART physical transmission layer. For instance, RS-485 applies modbus protocol to build cheap monitor systems. Network transmission is a necessary function, and it generally achieves high data transfer rate application through Ethernet. The UNIX-like network socket has served network application very well. Embedded systems are usually diskless systems. In order to keep permanent data, using flash memory as block disk system is a widely adapted strategy and which operates flash memory through MTD subsystems¡][28]¡^. An MTD subsystem contains two different modules, ¡§user¡¨and ¡§driver¡¨. In the driver module, CFI¡][40]¡^ is applied to probe flash chip, partition it and provide operating function. Flash translation layer and file-system are applied in the user module. MTD BLOCK is used to emulate the flash partitions as block devices which are then mounted into Linux virtual file system¡]VFS¡^with JFFS2 type, designed according to the feature of flash devices. In this thesis, we will describe in detail the procedure of porting Linux to ARM micro-controllers. The motivation of the work is introduced in chapter 1. In chapter 2, we introduce development tools and the main flow of the porting procedure. In chapter 3, we describe the LH79525 platform and the main perepherals on the target board, then introduce the ARM programmer model. In chapter 4, we examine the required knowledge and the important issues for porting ARM Linux. In chapter 5, we describe the details of porting Linux to run with Sharp LH79525, including modifying the key source codes and adjusting kernel configuration for embedding the UART, ethernet MAC, and MTD subsystem. In chapter 6, we do step-by-step validation and apply an integrated application with the LF-314CP temperature controller¡][46]¡^ by law-chain technology for the LH79525 target board running with the ported ARM Linux. In chapter 7, we present some issues for future work and improvement, then make a conclusion for the thesis.

The thesis deals with design and realization of communication among autonomous mobile robots and stationary localization stations using Nucleo development boards and a wireless IQRF modules. The theoretical part is focused on characterization of suitable hardware elements and communication technologies. In the practical part, the thesis deals with the description of possible communication schemes, used hardware, developed algorithm, software of individual members and diagnostic tools developed for thesis's purpose. In the last part, attention is paid to testing the resulting solution.

Master’s thesis deals with the design of development kit for communication between a microcontroller and a computer using USB, Bluetooth, WiFi and Ethernet interfaces. In the theoretical introduction is the analysis of theese interfaces and the interfaces used for communication by the microcontroller. In the next part, components for the development kit are selected. Then a wiring diagram and the printed circuit board is designed. Next, the firmware design is described. The last chapter deals with the implementation and testing of the development kit. The appendix contains a proposal for a laboratory task to introduce the development kit to students.

Aim of this thesis is design and realization of serial communication monitor. The thesis describes creation of hardware device responsible for collecting data from analyzed communications and for distribution of these data by USB bus. Thesis also explains connection between serial monitor and software Wireshark by extcap interface. Visualization of data in readable format is done by decoding script, which is tested by selected protocol. The last part of the study is focused on evaluation of data permeability of hardware device according to data line fullness.

The diploma thesis deals with the questions of battery powering, measuring of analog physical values using microcontroller and recording of data on a memory SD card Bibliographic reference: REZEK, P. Battery powered datalogger. Brno: Brno University of Technology, Faculty of Electrical Engineering and Communication, 2008. 65 p. Supervisor: Ing. Zdeněk Bradáč, Ph.D.