National Repository of Grey Literature 151 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Design of a mobile robot with an augmented reality user interface
Adámek, Roman ; Věchet, Stanislav (referee) ; Bastl, Michal (advisor)
This thesis deals with the design and construction of a four-wheeled mobile robot designed for an interactive exhibit and educational purposes. This robot is capable of wireless image transmission and manipulation with objects. In addition, this thesis deals with the construction of a charging station and user interface for controlling the robot which contains elements of augmented reality and minigames.
Analýza využití SMART materiálů jako aktivních prvků pro snímáni vibrací
Rabčan, Jakub ; Věchet, Stanislav (referee) ; Hadaš, Zdeněk (advisor)
This diploma thesis deals with the possibility of vibration sensing and vibrodiagnostics based on the use of so-called "SMART" materials such as piezoelectric layers or structures. Research studies have examined the general overview of vibrodiagnostic methods and their analysis of the possibility of sensing vibration by piezoelectric structures. This was followed by measuring and evaluating the results using various vibro-diagnostic methods. The results were compared with those obtained by sensing vibration using an accelerometer. We also dealt with the problem of detecting the deformation of the device by sensing vibration with piezoelectric structures. The last part was programming the "Myrio" to capture and evaluate the vibration using Labview.
History of Iron and steelworks Třinecké Železárny
Niemczyk, Roman ; Němec, Karel (referee) ; Věchet, Stanislav (advisor)
The bachelor´s thesis is a technical summary and it is describing the history of Třinecké železárny since its creation in the 1850s to the present. The history of iron processing is briefly described. Furthermore, the thesis focuses to manufacturing process of Třinecké železárny and also to iron and steel production technology. At the last part are decribed typical products of Třinecké železány and future prospects of ironworks.
Extremely low cycle fatigue life of magnesium alloy
Novák, Marek ; Věchet, Stanislav (referee) ; Zapletal, Josef (advisor)
The goal of this bachelor´s thesis is to predict the fatigue life of magnesium alloy AZ61 in the very low cycle count range (less than 100), which also called extremely low fatigue (ELCF) range. Life prediction predicted by Manson-Coffin´s law is higher than the experimental values show. The main problem is that the slope of the real life curve in the ELCF range is different than the slope of the predicted one. A new regression function with additional material parameters has to be found to match the experimentally measured values. The thesis deals with the literature search of the ELCF range and models of fatigue life prediction in the said range. Furthermore, in the experimental part of the thesis, magnesium alloy AZ61 without any heat treatment has been measured for mechanical and fatigue properties. Also, the microstructure of the alloy was observed. Measured values of fatigue life in the ELCF and LCF range were fitted by a regression function proposed by L. Xue.
Influence of asymmetry loading cycle on fatigue crack growth of alloy Inconel 625
Kander, Jan ; Kohout, Jan (referee) ; Věchet, Stanislav (advisor)
The main subject of this bachelor thesis was to evaluate influence of asymmetry of loading cycle on fatigue crack growth rate in a nickel-based superalloy Inconel 625. Experimental part of this thesis was carried out in Material and metallurgical research Ltd. Company in Ostrava, it’s main aim was to study the influences of loading cycles with parameter of asymmetry R = 0,1 and R = 0,7 on crack growth rate. Theoretical part deals with structure of nickel-based superalloys and fatigue crack growth rate.
Analysis of ZED stereocamera in outdoor environment
Svoboda, Ondřej ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
The Master thesis is focused on analyzing stereo camera ZED in the outdoor environment. There is compared ZEDfu visual odometry with commonly used methods like GPS or wheel odometry. Moreover, the thesis includes analyses of SLAM in the changeable outdoor environment, too. The simultaneous mapping and localization in RTAB-Map were processed separately with SIFT and BRISK descriptors. The aim of this master thesis is to analyze the behaviour ZED camera in the outdoor environment for future implementation in mobile robotics.
Navigation of B2 mobile robot in outdoor environment
Hoffmann, David ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
This master’s thesis deals with the navigation of a mobile robot that uses the ROS framework. The aim is to improve the ability of the existing B2 robot to move autonomously outdoors. The theoretical part contains a description of the navigation core, which consists of the move_base library and the packages used for planning. The practical part describe the aws of the existing solution, the design and implementation of changes and the results of subsequent testing in the urban park environment.
Development of mobile robot autonomous docking
Čepl, Miroslav ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
This thesis implements solution for automatic docking for a mobile robot using visual markers. After initial survey of already implemented works, new docking solution is proposed. Feasibility of the solution is verified with tests of marker detection precision. The implementation is tested in a simulation and with a real robot. The functionality of the proposed solution is verified by long-term tests. The result of this work is robot’s ability to navigate known environment to find and dock a charging station. After charging the robot is able to safely disconnect from the station.
Design and implementation of the technological sample with data acquisition in the IoT environment
Vrbková, Michaela ; Hadaš, Zdeněk (referee) ; Věchet, Stanislav (advisor)
This thesis deals with the design of a technological demonstrator for data collection in IoT environment. A study of available IoT technologies was made, consisting of a description of available sensors / actuators, data transmission and processing. At the same time, the key components of the demonstrator, the AWS IoT cloud service and the MQTT communication protocol, were described. Based on the IoT technology study, a representative set of technological demonstrator elements was designed. Its functionality has been experimentally verified using the ESP8266 and ESP32 WiFi modules using Mongoose-os firmware. The result is a demonstrator of IoT data collection designed for usage in an Smart House.
Fusion of Local and Global Sensory Information in Mobile Robot Outdoor Localization Task
Krejsa, Jiří ; Věchet, Stanislav
During outdoor localization of on-road mobile robot the task of keeping the robot on the road requires the fusion of global (GPS, magnetometer) information with the local one (odometry, laser rangefinder data, camera images). The paper describes our approach to the task, based on nonlinear Kalman filter. Odometry serves as the input into the prediction task, followed by correction based on global sensor information and pose estimate obtained this way is further modified with respect to the environment map and local information about the position on the road.

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