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Nanometric vibrometry
Ševčík, Michal ; Schimmel, Jiří (referee) ; Škarvada, Pavel (advisor)
This thesis deals with the precise measurement of distances in nanometer range at ultrasonic frequencies for the purposes of vibrometry. The paper is primary focused on~nanometric displacement measurement methods. First the thesis deals with the physical phenomena based on light in the theoretical section. This includes interference of light, index of refraction, polarization, interferometry and more. Understanding of these physical laws is crucial for design and assembling of the interferometer. Subjects of interferometric method for precise and fast measurement of the nanometric displacement and vibration are discussed. Interferometer components such as lasers, photodetectors and optical elements are described are described in the final part of this section. Practical section of thesis can be divided into two parts. The design and assembling issues are discussed in the first section. Many problems which I had to solve are described. Control software and implementation of the signal processing is the subject of the second part. I met with particular problems such as phase unwrapping. I solved this problem of discontinuous phase field with user written algorithm. Finally the graphical user interface was created. Using assembled interferometer and written software application I measured vibration of Langevin transducer on ultrasonic frequencies.
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Manipulator of Tools, Tool Heads and Tools Holders
Ševčík, Michal ; TOSHULIN, Jiří Popelář, (referee) ; Novotný, Lubomír (advisor)
The aim of this diploma thesis is to design manipulator for handling tools and tool heads between two tool’s magazines of the two vertical machining centers. One part of this thesis is a proposal of solutions, selection of the optimal choice, its construction and technical calculations of some construction nodes. Other parts of this thesis are technical drawings. The technical drawing of assembly, and two technical drawings of main components.
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