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Laboratory task - system for measurement of optical fibre attenuation by direct method
Jančová, Silvie ; Horváth, Tomáš (referee) ; Dejdar, Petr (advisor)
The bachelor's thesis deals with the issue of attenuation in optical fibers and subsequent measurement using the transmission method. The theoretical analysis deals with the optical fibers themselves and their transmission properties with an emphasis on dispersion and standards. The original idea of the practical part was the implementation with a photodetector. Due to the small power of the photodetector, the practical part focuses on the demonstration of attenuation measurement using measuring devices that are commonly used in practice. In the laboratories, optical fibers with a length of several tens of kilometers are used for demonstration. The laboratory task will help students to master the basic units of attenuation and gain an understanding of measurement in practice.
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3D-printed calibration phantoms for imaging systems
Fasura, Dominik ; Harabiš, Vratislav (referee) ; Dostál, Marek (advisor)
This bachelor thesis deals with the production of calibration phantoms for imaging systems using 3D printing. It presents the calibration methods according to the recommendations of the state Office for Nuclear Safety (SÚJB) and the calibration phantoms used at the Brno University Hospital. Furthermore, the basic theory of 3D printing, the technologies used, modification of the model in the slicer, setting parameters for subsequent printing. Calibration phantoms are modelled in Fusion 360 and then printed on Original Prusa i3 MK3S+ printer with MMU2S upgrade. Subsequently, the calibration phantoms are tested on computed tomography. The results are compared with the available phantoms at the department.
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Kalibrace vertikálního délkoměru Mahr Precimar DGV 100
PEKÁREK, Ondřej
The aim of this work is commissioning and revitalization of Mahr Precimar DGV 100 device. It is used to calculate length measurement in vertical direction (range: 0-101,6mm, resolution 10-4 mm) and for the calibration of dial indicators. It also enables other types of measurement e.g. pressure force. The device hasn't been used for many years, and noone can currently work with it in the measuring laboratory. The aim of this work is a complete revitalization of this long term unused device, its calibration, execution of a test measurement and repeated integration into the measuring procedures.
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Charakterizace reaktivního plazmatu s využitím vysokofrekvenční sondy
POSPÍCHAL, Aleš
The bachelor thesis was focused on the proces of construction, calibration and testing of measuring gadget, which might be used in Laboratory of plasma physics at Faculty of Science. This device was consisting of high frequency voltage and current sensor based on a capacitive sensor and Rogowski coil respectively. Results from all steps of making and usage of measuring gadget are submitted in this thesis
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SYNTHESIS AND DETERMINATION OF PROPERTIES OF PURE PHASES OF PORTLAND CLINKER AND THEIR POLYMORPHS
Ravaszová, Simona ; Keppert, Martin (referee) ; Reitermann, Pavel (referee) ; Palou, Martin (referee) ; Dvořák, Karel (advisor)
Quantitative diffraction analysis is currently carried out through Rietveld analysis, which is able to decode the various diffraction lines on a diffraction record, provided that the structural model for each clinker phase is well known. The subject of this dissertation is the laboratory preparation of pure phases of one triclinic and two monoclinic polymorphs of the main clinker mineral alite, which will serve as standards for the calibration of powder X-ray diffraction analysis. The result of this work will be detailed procedures for the preparation of individual polymorphs of alite and calibration relationships for unambiguous and easier identification of monoclinic polymorphs in real clinkers.
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Determination of device geometrical misalignments influence on dimensional measurements in X-ray microcomputed tomography
Blažek, Pavel ; Klapetek, Petr (referee) ; Zikmund, Tomáš (advisor)
Tato práce se zabývá geometrickými nepřesnostmi v geometrii rentgenového počítačového tomografu (CT přístroj). Především jejich vlivem na výsledky metrologických měření a metodami kterými lze tyto negativní efekty eliminovat. V práci jsou prezentovány výsledky simulací CT měření v softwaru aRTist při kterých byli nastavovány nepřesnosti v pozici detektoru a osy rotace vzorku. Ukazuje se tak, které geometrické faktory mají na měření největší vliv. Praktická část se pak zabývá CT přístrojem HeliScan, který využívá unikátní rekonstrukční algoritmus k eliminaci geometrických nepřesností. Jsou vyvinuty referenční objekty (pláty s rubínovými kuličkami a zirkonová koule), které splňují požadavky normy VDI/VDE 2630 1.3. na testování metrologických schopností přístroje. Objekty vhodné pro měření ve větším zorném polem byly vyrobeny, zkalibrovány a otestovány v CT měření.
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Internal combustion engine control in the LabView environment
Adamec, Vojtěch ; Kučera, Pavel (referee) ; Svída, David (advisor)
This thesis deals with the control of a diesel internal combustion engine. The aim of the thesis was to make a methods overview of diesel internal combustion engines control, to develop an algorithm for a six-cylinder diesel engine control and then to program it in the LabView environment. The thesis also describes the calibration of sensors and engine control unit. The algorithm was tested using a programmed signal generator and an oscilloscope.
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Assessment of pressure conditions in the water supply network of the village Poličná
Zuzaňák, René ; Libosvár, Dušan (referee) ; Ručka, Jan (advisor)
The bachelor thesis is devoted to the hydraulic analysis of the water supply network in the municipality of Poličná, Vsetín district. The introductory part of the thesis is devoted to the theory of mathematical modelling of the water supply network. A quasi-dynamic hydraulic model of the entire water supply network was created to determine the pressure conditions of the water supply network and then calibrated and verified based on the pressure measurements on the water supply network. The characteristic operating conditions of the water supply network were reflected in the simulation model of EPANET 2.2. Following the existing scale and type of development given by the current zoning plan of the municipality of Poličná, the pressure conditions on the water supply network of the municipality of Poličná were assessed using the results of the hydraulic analysis. The thesis includes proposed measures to optimize the pressure conditions for the prospective scale of development.
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Calibration and evaluation of data from strain gauges
Dubina, Jozef ; Mačák, Martin (referee) ; Vyroubal, Petr (advisor)
This thesis describes calibration and evaluation of data measured from tensometric sensors. The labour describes tensometers in general, their functions, aplications and principle of operation. Loading data from tensometric sensors is next part of this labour, where are information how to convert analog to digital signal output, which is ready for processing and shows real values. After signal is converted to digital signal, is needed to calibrate tensometers to receive high precission values of weight according to reference load. Thesis describes choices of electronic and mechanical components for building digital scale. Software developing for this electronic equipment is described in next part of thesis.
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Spectral Analysis in Microscopy
Sýs, Michal ; Procházková, Jana (referee) ; Štarha, Pavel (advisor)
The aim of this work is to develop a mathematical apparatus for the accurate description of the colour of objects in a microscope image. This problem is solved by extracting the brightness intensities of pollen grains at fourteen wavelength bands and representing them in color space. The developed apparatus has been successfully applied to two series of images, allowing comparison of the color of individual objects and simplifying its description. The results obtained allow accurate investigation of the colour of objects in the image and form a simple tool for spectral analysis.
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