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Design of complex sensor node for LoRa network
Obrtáč, Tomáš ; Sova, Václav (referee) ; Chalupa, Jan (advisor)
This thesis covers development of complex sensor for LoRa network. The thesis is extended by theoretical section, which explains basic properties of Lora network. Theoretical section also covers analysis of software and hardware products on market. The practical part of thesis is focused on creation of complex sensor and development of complete server for its operation. In the hardware part is described method of choosing the right sensors, designing the PCB and description of important parts. Software development is described from acquisition of network server, through creating the computer application, to programming the MCU.
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Robust wheeled robotic chassis
Jirges, Radek ; Chalupa, Jan (referee) ; Bastl, Michal (advisor)
This thesis deals with the issue of the proposal of mobile wheeled robotic chassis. In the introductory theoretical part gives an overview of the division of mobile chassis inclu-ding representatives of each group. In the begining of the practical part describes se-lection of suitable components for the chassis from drivetrain to controlling electronics. Constructional part of this thesis at first deal with selection of suitable material for each part of chassis and than follows construction of these components including decsription of used constructional solutions for each issue. Result of this thesis is robust wheeled chassis fitted with drivetrain and basic electronics.
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Design of Power HIL unit for Li-pol cell simulation
Pribulla, Daniel ; Sova, Václav (referee) ; Chalupa, Jan (advisor)
This thesis deals with design and construction of a Li-po cell Power-HIL simulator intended for testing of a small wireless module's powering. The simulator is based on a battery model which includes the influence of temperature and battery degradation on battery parameters. To estimate model parameters a series of tests on real Li-po cell with capacity 250mAh were performed. Charging and discharging tests were performed by different temperatures of the battery. In purpose of this test a simple thermal chamber was constructed. Design of the power electronics of the device was tested in the Simscape library of the Matlab Simulink. The result is a working prototype of the simulator tested for charging and discharging of batteries with capacity in range 100-1500 mAh. The simulator can be controlled with graphical user interface capable of setting the battery parameters and real time observation of the model variables.
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Application of MyRIO as wireless sensor node
Navrátil, Patrik ; Chalupa, Jan (referee) ; Kšica, Filip (advisor)
This thesis describes a design of a client application for NI myRIO and a server application for PC. Applications are developed in a LabVIEW environment. Client application is responsible for measuring data from integrated accelerometer and a sensor connected to an AD input and sending it to the server application. The applications are tested with a piezocomposite sensor on an elementary dynamic system.
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Design of Robot end effector with automatic tool exchange
Jirges, Radek ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
The goal of this thesis was to design an end effector for a small robot for testing of devices with a touchscreen. The effector has to communicate with the robot via serial interface and provide feedback about used downforce. Another requirement was possibility of automatic tool change. Measuring of downforce, signal processing, and communication with robot ensures custom electronics based on STM32 microprocessor and piezoresistive sensor. The mechanism of tool change was inspired by the system used with industrial robots but customized for this application. The result of this thesis is a functional prototype of a stylus for devices with a touchscreen which provides feedback about the downforce on display and possibility of automatic tool change. The main benefit of this solution is the possibility of changing the tool for the one with one or more styluses for testing gesture-based interface what is indispensable in these days.
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Design of miniature thermal chamber
Červínek, David ; Bastl, Michal (referee) ; Chalupa, Jan (advisor)
This thesis is about designing and bulding temperature chamber. Main use for this chamber is to test devices which are designed in Mechlab laboratory. While I was developing this chamber I used Simuling for simulation of thermodynamic events. For LC filter simulation I used LTspice IV. Peltiers device is used as cooling/heating element. For calculation and control is used 3.5“ touch screen programmed in 4D Workshop. Final device is capable to automatically maintain set temperature in range of -13°C to 80°C. Temperature can be set as stationary or cyclic between two predefined temperatures. User can also choose temperature that will be used by regulator.
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HIL Simulation of Electronic Throttle
Maliszewski, Michal ; Chalupa, Jan (referee) ; Sova, Václav (advisor)
This thesis deals with the Hardware in the Loop (HIL) simulation of an electronic throttle. In the following text its mathematical model for different options of friction and hardstops is deduced. Model parameters were obtained by measurement on the real throttle. In the next step the thesis aims on designing the suitable control algorithm, which is used for own HIL simulation. The output of the thesis is the choice of the best model with respect to accuracy and computation time of the simulation.
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Sensorless position control of solenoid valve
Piňos, Matěj ; Chalupa, Jan (referee) ; Grepl, Robert (advisor)
This thesis deals with position control of movable solenoid core without using a distance sensor. There are several methods of sensorless position estimation presented in theoretical part. The method based on measurement of ripple current is chosen for experiments. Firstly, it is verified by simulations with mathematical model of solenoid. After that, the experiment is created. The goal is position control based on sensorless method.
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