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Application of DIC method for measurement of deformations on small specimens
Vejchoda, Ondřej ; Houfek, Lubomír (referee) ; Návrat, Tomáš (advisor)
This diploma thesis tries to find the most suitable optical system for measuring deformation displacements on the surfaces of bodies. The first chapter describes the systems and methods that will be used. The second chapter is devoted to the design of the experiment. It describes the preparation of the experiment from the point of view of software and hardware and what are the important preliminary preparations. The last chapter contains the results of experiments and evaluation of the systems.
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CCD detection of media meters with RF communication
Petřek, Miroslav ; Kaczmarczyk, Václav (referee) ; Bradáč, Zdeněk (advisor)
The aim of the bachelor thesis is to design and implement devices capable of sensing and transmitting states wirelessly, meaning the measured values of the consumption meters. In the work are first briefly described the basic types of the consumption meters and their possibilities of processing and transmission of the measured data. Furthermore, the most common types of communications used today for data transfer between sensors and microcontrollers are mentioned. The design of the device itself consists of identifying suitable units and their properties and then choosing the circuits. In the work is briefly described the process of schematic and printed circuit boards design, their installation with selected components and modules and the subsequent first startup. The penultimate part of the thesis deals with the design of software for commissioning and communication between the computer and individual components of the device. At the end, the results and suggestions for improvement of the existing equipment are consulted.
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Application of DIC method for measurement of deformations on small specimens
Vejchoda, Ondřej ; Houfek, Lubomír (referee) ; Návrat, Tomáš (advisor)
This diploma thesis tries to find the most suitable optical system for measuring deformation displacements on the surfaces of bodies. The first chapter describes the systems and methods that will be used. The second chapter is devoted to the design of the experiment. It describes the preparation of the experiment from the point of view of software and hardware and what are the important preliminary preparations. The last chapter contains the results of experiments and evaluation of the systems.
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Sensor Calibration for Multispectral Data Fusion in Mobile Robotics
Kalvodová, Petra ; Hanzl, Vlastimil (referee) ; Mazal,, Jan (referee) ; Pospíšil,, Jiří (referee) ; Weigel, Josef (advisor)
Thesis deals with data fusion and calibration of sensory system of Orpheus-X3 robot and EnvMap mapping robot. These robots are parts of Cassandra robotic system that is used for exploration of hazardous or inaccessible areas. Corrections of measured distances are determined for used laser scanners Velodyne HDL-64, Velodyne HDL-32 and range camera SwissRanger SR4000. Software MultiSensCalib has been created and is described. This software is used for determination of intrinsic parameters of heterogeneous cameras of the sensory head and for determination of mutual position and orientation of these sensors. Algorithm for data fusion of CCD camera stereo pair, thermal imager stereo pair and range camera is proposed. Achieved calibration and data-fusion parameters are evaluated by several experiments.
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CCD detection of media meters with RF communication
Petřek, Miroslav ; Kaczmarczyk, Václav (referee) ; Bradáč, Zdeněk (advisor)
The aim of the bachelor thesis is to design and implement devices capable of sensing and transmitting states wirelessly, meaning the measured values of the consumption meters. In the work are first briefly described the basic types of the consumption meters and their possibilities of processing and transmission of the measured data. Furthermore, the most common types of communications used today for data transfer between sensors and microcontrollers are mentioned. The design of the device itself consists of identifying suitable units and their properties and then choosing the circuits. In the work is briefly described the process of schematic and printed circuit boards design, their installation with selected components and modules and the subsequent first startup. The penultimate part of the thesis deals with the design of software for commissioning and communication between the computer and individual components of the device. At the end, the results and suggestions for improvement of the existing equipment are consulted.
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Characterization of spectrograph with CCD camera
Vyvlečka, Michal ; Němec, Petr (advisor) ; Zahradník, Martin (referee)
1 Title: Characterization of spectrograph with CCD camera Author: Michal Vyvlečka Department: Department of Chemical Physics and Optics Supervisor: doc. RNDr. Petr Němec, Ph.D. Abstract: This work is focused on the determination of parameters of a CCD camera DU420A-OE and a spectrograph SR303i-A, which were bought in summer 2014 to the laboratory of Opto Spintronics at the Charles university in Prague. The first chapter includes a short description of CCD detection and focuses itself on a classification of noise affecting spectroscopy measurements and possibilities of its elimination. The second chapter includes the description and the results of measurements of the properties of the CCD camera and the spectrograph. The emphasis is put on the measurements of influence of various parameters and conditions for measuring the signal to noise ratio and on finding the optimal configuration for measuring weak signals, which means that the results of this work can be generalized for all the spectroscopic measurements in which CCD cameras are used as detectors. Keywords: CCD camera, spectroscopy, dark noise, readout noise
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System for electroluminiscence defect detection of solar cells
Marčík, Silvestr ; Jandová, Kristýna (referee) ; Vaněk, Jiří (advisor)
The master thesis focuses primarily on issues of photovoltaic cells in terms of their defects. The introductory part deals with the history of photovoltaics, their introduction into practice and finally an explanation of the photoelectric effect itself. The thesis also describes photovoltaic cells themselves. It explains their principle, advantages, disadvantages and the creation of photovoltaic systems. A substantial part of the work is focused on the topic of detection of defects using luminescent methods. Subsequently, it describes procedural defects arising from the improper handling of already manufactured products. The final part deals with the main topic of the work, which is a detection using luminescence methods and it also mentions the non-luminescence method LBIC. The practical part of the master thesis contains the analysis of the current solution and of the subsequent proposal of solution using a low cost camera. It describes how to modify the camera, verify its spectral sensitivity using a spectrometer and measure the sensitivity of the CMOS sensor. The conclusion is focused on verifying the functionality of the proposed solution on different sources of infrared radiation and photovoltaic panels themselves.
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Characteristics features of luminescence radiation solar cells
Malý, Martin ; Šimonová, Lucie (referee) ; Stojan, Radek (advisor)
This thesis deals with characteristic features of luminiscence radiation solar cells during electroluminiscence. Electroluminescence is the process in which a substance begins to radiate electromagnetic radiation (luminiscence radiation) due to passing electrical current. Various defects in the structure of the photovoltaic cell can cause polarization of that radiation. The aim of this thesis is to measure some polycrystalline solar cells by electroluminescence. Selected solar cell is measured by electroluminescence extended by polarizing filter and afterward collected data are processed in MATLAB.
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Optimization of pre-assembly of planetary wheels
Krejcar, Pavel ; Opl, Miroslav (referee) ; Bradáč, František (advisor)
The aim of my thesis is a comperation with Linde Pohony s.r.o. Our aim is to suggest the realization of automatic control of pre-assembly of planetary wheels. The solution with CCD cameras and sensors is interpreted in a detailed way - treir reliability suggestibility by milieu and attendance service.The second part continue of a suggestion of automized workplace with a full detailed drawings. Abstrakt
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CCD camera with wirelles interface
Hynčica, Tomáš ; Fiedler, Petr (referee) ; Bradáč, Zdeněk (advisor)
The work is dealing with the problem of wireless transfer of visual information from CCD camera. A circuit board for the camera interface is designed and realized. The wireless communication is based on the IEEE 802.15.4. Software for components of the system is developed.
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