|
Design and implementation of equipment for calibration of the measuring unit
Jovanović, Lazar ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
The aim of the bachelor thesis is the design and implementation of a device for verification of the correctness of strain gauge measuring centers using simulation of strain gauge transformation. The thesis includes the creation of a breadboard prototype to verify the principle of operation of the future device, and later the creation of the designed device. The device itself consists of an ATMEGA328P-AU microcontroller, AD8403 digital potentiometer, and resistors connected in a Wheatstone bridge.
|
|
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.
|
|
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.
|
| |
|
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.
|
|
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.
|
|
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.
|
| |
|
3D Slicer Extension for Tomographic Images Segmentation
Chalupa, Daniel ; Jakubíček, Roman (referee) ; Mikulka, Jan (advisor)
This work explores machine learning as a tool for medical images' classification. A literary research is contained concerning both classical and modern approaches to image segmentation. The main purpose of this work is to design and implement an extension for the 3D Slicer platform. The extension uses machine learning to classify images using set parameters. The extension is tested on tomographic images obtained by nuclear magnetic resonance and observes the accuracy of the classification and usability in practice.
|
|
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.
|