|
|
Definition of the Method for Measurement of Bulk Materials Geometry on the Stockyards
Nešpor, Tomáš ; MIP,, Jiří Slovák, (referee) ; Polsterová, Helena (advisor)
This thesis is concerning about measurement of bulk materials geometry on the stockyards. In the first part of the document is summarized basic allocation of stockyard types, stockyards architecture and methods of bulk materials stacking. Furthermore there are allocated particular stacking and recovering technologies of bulk materials on the stockyards. The experimental part of the thesis is concerning about introduction to measurement of bulk materials geometry and its state consequently selection and description of measurement devices intended to forenamed purpose. The experimental part of the thesis is dedicated to determination of algorithms for measured data processing on a combined stacker/reclaimer machine; consequently it is dedicated to software equipment of data gathering PLC system. At the last part of the thesis a description of designed input data simulation and visualization which displays gathered data by PLC system are stated.
|
|
|
Problems in Solder Paste Stencil Printing for Fine Pitch Components
Šimeček, Ondřej ; Polsterová, Helena (referee) ; Starý, Jiří (advisor)
Despote the indisputable advantages of fine-pitch components, is need to calculate with a few trouble during production, especially increased requirements for accuracy of mounting and solder printing. In this work I’m concerned with problems of solder printing for these components and evaluation using SPC. For the evaluation I used 3D paste inspection based on laser scanning of the surface. The output of this work is to describe the principles of solder printing and elaborating of GR&R, SPC analysis and histograms of solder printing for some outputs. I focused in my master thesis on motive design change of problematic components and economic evaluation of the adjustments.
|
|
|
Research of Static Electricity Meters Reliability
Voborník, Petr ; Polsterová, Helena (referee) ; Szendiuch, Ivan (advisor)
This work deals with setting of dependability of static electricity meters. The first two chapters deal about electricity meters and dependability in general than there are introduced three possible ways for getting dependability parameters. The first methode is data collection from the field. The second methode is reliability prediction from component's reliability. The third methode is aging life tests. Conclusion contains evaluation of results and highligting of importance for practical usage.
|
|
| |
|
|
Study of electric properties of composite
Macháček, Miroslav ; Havlíček, Svatopluk (referee) ; Polsterová, Helena (advisor)
This work deals with issues of composite materials. The general aim is to observe how the amout of filling infuence dielectric spectrum which is measured on prepared samples. For this purpose had been created variety of a samples with different percentage of filling with mica. Measured values had been compared with theoretically values, determinated using mixture formulas.
|
|
| |
|
|
Preparation of a diagnostic laboratory for accreditation
Malík, Luděk ; Polsterová, Helena (referee) ; Jandová, Kristýna (advisor)
In the diploma thesis, the process of preparation of the selected electrotechnical laboratory for accreditation is described. The thesis deals with the accreditation system of the Czech Republic, which also contains the process of an accreditation. The work contains a summary of requirements from the standard ČSN EN ISO/IEC 17025:2018. A laboratory has to meet these requirements in order to receive accreditation. Following the content of the standard, the short research of metrology is also included. The diagnostic laboratory which is being prepared for accreditation is also introduced. Direct financial expenses of the accreditation are also included. The introduction of new procedures in the laboratory in accordance with requirements from standard, inspection of the present state, inspection and creation of the controlled laboratory documentation in a way to meet requirements from standard ČSN EN ISO/IEC 17025:2018 are encompassed in the preparation for accreditation. The laboratory requires software of a suitable type to be selected, which suits accreditation and helps the laboratory maintain controlled documentation in order, as well as metrology processes.
|
|
|
Usability of OEE in the Automotive manufacturing plant
Poledník, Tomáš ; Steiner, Patrik (referee) ; Polsterová, Helena (advisor)
This diploma thesis deals with the design and implementation of a comprehensive solution for the collection of production indicators in the commercial vehicle sector, called Automotive. The design is done by analyzing the state and identifying the bottlenecks of the OEE (Total Equipment Effectivenes). Further, the thesis describes the general theory of efficiency, availability and FPY (First Pass Yield). Realization and visualization of several production equipment variants for raw data collection from production lines in the manufacturing company IMI International CZ s.r.o. - a leading manufacturer of pneumatic components for the automotive and automation industry.
|
|
|
Influence of the Temperature on the Dielectric properties epoxy with ground mica
Ráček, Tomáš ; Havlíček, Svatopluk (referee) ; Polsterová, Helena (advisor)
The paper is focused on theoretical analysis of the basic characteristics of dielectrics, especially on the examination of these qualities at samples of epoxy sealing compound filled with powder mica, and their dependance on the temperature and the content of filling in the material. The measured quantities are inner resistivity, relative permitivity, and loss factor. The paper also deals with the sensitivity of the material to humidity, and through the influence of humidity to the other measured quantities.
|
|
|
Degradation of nanocomposites
Polách, Ondřej ; Rozsívalová, Zdenka (referee) ; Polsterová, Helena (advisor)
The present work deals with the electrical properties of nanocomposite materials. Samples for the practical part consisting of epoxy resin as matrix and SiO2 as nanofillers and were made in four different percentage performance. There is investigated the influence of thermal degradation of nanocomposite materials change resistivity, loss factor and relative permitivity.
|
guest ::
