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Communication Buses in Automotive
Kohout, Robin ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
This bachelor thesis focuses on the comparison of data buses used in the automotive industry in terms of suitability of use and cost. After an introductory section that presents the history and technical parameters of data buses, a description of CAN, LIN, MOST, FlexRay and Ethernet buses follows, which includes basic information, communication mode, connection method, transmission flow and application of the data bus. The final part of the thesis includes a table that allows the reader to get a quick overview of the characteristics of each bus and provides useful information for the correct selection of the bus depending on the specific needs and requirements of the application.
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Design of control unit for an autonomous vehicle
Vobruba, Martin ; Formánek, Martin (referee) ; Adámek, Roman (advisor)
The topic of this bachelor thesis is designing control unit for an autonomous vehicle. The new ECU replaces the old one which was without access to the source code, so its functionality couldn’t be modified. The purpose of the ECU is to receive a message from the control computer, process it, control the actuators according to the orders and inform the computer about their current state. The first part of the thesis is research of the vehicle kinematics and CAN bus. The practical part focuses on the analysis of the previous ECU which is crucial to its replacement. It is followed by the firmware and hardware design. The last practical part of the thesis is the testing of the new ECU’s functionality.
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System for Support of Short-Term Car Rentals Based on Carsharing
Vrtal, Petr ; Bidlo, Michal (referee) ; Šimek, Václav (advisor)
The aim of this thesis is to create a system for the transformation of an ordinary passenger car into a vehicle capable of sharing in the form of short-term loans. Vehicle rentals are completely unattended, which was achieved by implementing service applications in the form of an administration and user tool. The administrative application was created using web technologies, primarily Next.js and React. The customer application was implemented with the goal of high portability, and therefore its development was directed to mobile platforms using the React Native framework and the Expo tool. The vehicle is equipped with its own designed IoT end device in the form of a printed circuit board, capable of permanent wireless connection to the network based on LTE-M technology and MQTT protocol. The purpose of this device is to provide current vehicle data obtained by reading communication on the CAN bus, connecting to a standard OBD-II diagnostic port. An important part of the work was the execution of a series of tests of all sub-aspects of the implemented architecture, focusing mainly on reliability, resulting functionality and user-friendliness. The resulting system was tested in real operation and represents a way of non-invasively transforming a regular passenger car into a car capable of sharing.
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None homogenous robot swarm creation
Bělohlávek, Jan ; Bergeon,, Yves (referee) ; Křivánek, Václav (advisor)
The subject of this thesis is enabling the DJI Robomaster S1 robot to be used as an autonomous drone in a robotic swarm. This is achieved by an analysis and documentation of the robot's internal communications protocol and the implementation of this protocol into the system. The Robomaster S1 is an educational robot, that the University of Defense in Brno wants to use for experimenting with swarm formations. However, the design of the robot does not allow for it to be controlled by external code and its source code is not public. The robot's main computer controls the rest of the robot via CAN bus, this communication was reverse engineered and the individual commands were documented. The robot's main computer was replaced with an ESP32, which now sends the commands itself and controls the robot. A wireless control method, which utilizes the ESP-NOW protocol, was also implemented. This enables the user to control the robot manually, but also serves as a foundation to enabling several robots to communicate with one another. With the applied modifications the battery life also significantly improved. The robot can now be used in a robotic swarm.
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Autonomous system for control of aquarium
Charvot, Jakub ; Levek, Vladimír (referee) ; Tomíček, Pavel (advisor)
This thesis delves into the topic of aquarium automation, aiming to design custom system for this purpose. The essential technology requirements for efficient aquarium operation are summarized at the beggining followed by the market survey with depiction of existing commercial solutions in the field of automation. Regarding the practical part, the thesis explain the design process of the device and takes a deeper look at its crutial steps. System architecture is disccused as well as the creation of electrical schematics, and the design of custom printed circuit boards. The final part of the text is dedicated to the software. The outcome of the thesis is a modular system consisting of a control unit and several connected peripherals managing specific sensors and actuators. The entire system can be configured remotely via a web application.
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Triggering device for CANbus
Piroch, Vojtěch ; Arm, Jakub (referee) ; Burian, František (advisor)
This bachelor thesis deals with the design of a triggering device for the CAN bus that allows connection to the trigger input of an oscilloscope and display of the signal waveforms of the CAN bus frames. The first part of the thesis deals with the theoretical description of the CAN bus itself, its principle of operation, description of frames, etc. The second part of the thesis deals with the selection of the core components needed for the circuit, the design of the final schematic, the definition and calculation of the individual components in the circuit and the method of control. The third part is practical, it is dealing with testing the prototype device, designing the circuit board and packaging for the device. The following section describes the software part of the device, specifically how to control the device, a description of the program and libraries used in programming the microcontroller. The last section describes the final testing and measurement of parameters such as jitter and trigger pulse delay.
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Electronic speed controller
Šimbera, Michal ; Kučera, Pavel (referee) ; Svída, David (advisor)
The thesis deals with the design, realisation and functional verification of an electronic cruise control unit. Required inputs, outputs and controller of the control unit are identified first. The design and layout of the electronical components, including the processor, power supply and other necessary hardware is discussed. The algorithm for the control unit is developed in C/C++ and thoroughly analysed. The functionality of the cruise control unit equipped with the algorithm is verified through a case study performed on a combustion engine.
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Home automizing system
Papoušek, Marek ; Bohrn, Marek (referee) ; Pavlík, Michal (advisor)
The work deals with a design and realization of the comprehensive system of home automation. Individual elements of the system communicate utilizing CAN bus. Home automation system should provide lighting, heating and security management. The system should be controlled by tablets with android operating system utilizing developed control software. Microcomputer Raspberry Pi is used to control the automation system.
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FITkit CAN Implementation
Jančo, Tomáš ; Janoušek, Vladimír (referee) ; Hanáček, Petr (advisor)
This thesis describes main principles of communication on CAN bus, design and implementation of CAN bus controller. The controller is implemented in VHDL for school development platform FITkit. This work also describes design of CAN physical layer circuits for connecting FITKit to CAN bus.
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Diagnostic module for Single-Wire CAN bus
Jež, Michal ; Doseděl, Martin (referee) ; Havránek, Zdeněk (advisor)
The basic properties of the CAN bus are analyzed in the bachelor's thesis. Furthermore, this work deals with the availability of circuits for the implementation of the CAN bus and the physical layer Single Wire CAN. Subsequently, the design of the diagnostic unit for the CAN bus is processed. It also deals with the design of firmware for the diagnostic module and a PC program for subsequent data analysis. Finally, the compatibility of the Single Wire CAN bus with the Low Speed CAN bus is tested.
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