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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Datalogger pro stavební konstrukce / Datalogger or building constructions

Štábl, Martin January 2017 (has links)
This work deal with developing dedicated autonomous device for data collection. The work describes the approaches how to design that. Solve choosing of the sensor taking into his properties for this device. And regard on the comparison with similar devices on market according behavior and function. General concept of the suggested datalogger. The thesis contains hardware and software equipment of this device.
42

Rozšíření instrumentálního vybavení v kryomagnetické laboratoři / Extension of instrumental capabilities in cryomagnetic laboratory

Proschek, Petr January 2016 (has links)
Measurement of elastic properties (thermal expansion and magnetostriction) under (multi)extreme conditions is a difficult task. In the vicinity of the room temperature or above it an abundance of methods is available, with decreasing temperature and adding magnetic field and/or hydrostatic pressure their number is limited. Dilatometric cells (either planparaller or tilted plate design) provide superior sensitivity in low temperatures and applied magnetic fields, however, cannot be used in hydrostatic cell. Common choice for the measurement of thermal expansion under hydrostatic pressure are methods based on strain-gauges, with mediocre sensitivity and more importantly a difficult or even impossible usage at very low temperatures (T ≲ 3 K). Measurement of magnetic properties (especially magnetization) under (multi)extreme conditions is also a difficult task. In the vicinity of temperature 2 K and above it an abundance of methods is available, with decreasing temperature and adding magnetic field and/or hydrostatic pressure their number is limited. VSM system provides great sensitivity, but can not be used under 2 K and hydrostatic pressure. MPMS aparature provides pressure up to 9 GPa (diamond pressure cell), but still we can not apply lower temperatures than 2 K. Our aim is to develop a simple yet sensitive...
43

Vliv působení vnějšího prostředí na základní vlastnosti materiálu pro výrobu exteriérových dílců nábytku

Križanová, Adéla January 2019 (has links)
The diploma thesis deals with the impact of the external environment on the basic properties of composite material Richlite and its suitability for exterior furniture manufacturing. There is a brief overview of the properties of Richlite, possible ways of utilization and production process of the material itself and individual components. The main goal of the diploma thesis is to determine the influence of temperature changes and exposure to elevated temperatures on the mechanical properties of the material. The observed properties are the modulus of elasticity and the flexural strength ascertained by loading in a three-point system. The measured results were statistically evaluated, and it was found that the temperature changes could affect the flexural strength of Richlite.
44

System On-/Offline merania teploty na báze LabView / System of On-/Offline temperature measurement based on Lab View

Stejskal, David January 2019 (has links)
The objective of this thesis was to create a LabVIEW-based program for temperature measurement using a personal computer. The program allows reading and post processing of digital signal from a measuring device. This device consists of a sensor type PT100, a measuring transducer and an analog-to-digital converter with USB output. The theoretical part of the thesis deals with resistance temperature sensors, signal analysis and methods for signal processing. The practical part is conceived as a guide to the created program. This part introduces vital sub-elements of the program and describes their principle, practical use and also the operating instructions. As required by thesis assignment, practical part includes verification of the measuring device, which was performed in laboratory of Czech Metrology Institute in Brno.
45

Decentralizovaný systém řízení vytápění budov / DCS for building control

Kopeček, Petr January 2008 (has links)
This thesis deals with DCS for bulding control. The main aim was to develop a general system, which can be adapted according to the individual requirements and which should minimize costs too. Hardware modules, communication bus, communication protocol, system topology and regulation mechanisms, have been designed. Regulators have been set. There are introduced current realization and possible future extensions too. The high security and the high functionality topics are included.
46

Termodiagnostika - dotykové a bezdotykové měření teploty / Thermodiagnostics – contact and contact-free temperature measurements

Mikula, Martin January 2014 (has links)
This thesis is concerned with thermodiagnostics in industrial practise, which is very important for the assessment of technical condition of object on the basis of temperature, in today's time. It includes summary of contact and contact-free methods and their principle, advantages and disadvantages for aplication in industrial practise. Because of thesis it was carried out measurement in company Daikin Device Czech republic with the use of contact thermometer and two available thermocameras for solving of topical tasks relating to production.
47

Statistická analýza teplotních a srážkových časových řad v České republice v období 1961 - 2008 / Statistical Analysis of Temperature and Precipitation Time Series in the Czech Republic in Period 1961-2008

Helman, Karel January 2005 (has links)
The present dissertation deals with an analysis of monthly time series of average temperatures and precipitation sums recorded at 44 sites in the Czech Republic over the period of 1961--2008. The main research purpose is to acquire deeper knowledge of regularities in the climatic time series development, using an appropriate set of statistical methods. A secondary objective is to search and find correlations between the research outcomes and basic geographic coordinates (altitude, longitude and latitude) of particular measurement stations and comparing all the results achieved for the selected climatic elements. There are two major contributions of this work. In the first place, it presents new knowledge in the field of climatic time series, particularly in connection with the strength and development of their seasonal component, further for instance analysing the relation between the distribution of a residual component and the geographic coordinates of the measurement stations. Another contribution lies in an extensive application of statistical methods of climatic time series analysis. Several types of methods were used, having employed both widely and rarely applied statistical tools (linear trends analysis and Box-Jenkins methodology respectively) as well as those used for the very first time (moving-seasonal time series).
48

Automatizovaný systém pro měření teplotních zkoušek senzorů / Measuring system for temperature test of sensors

Turanský, Luboš January 2012 (has links)
In this work is described design of measuring and evaluation system for temperature rise tests in cooperation with ABB company. As temperature sensors are used thermocouples type L and measuring hardware consists of chassis cRIO 9073 and measuring card NI 9213. In LabVIEW 2011 is created software for cRIO and as well for control PC and structure of both programs is described in detail. Thesis includes also practical estimation of metrological parameters of created system.
49

Vývoj a prostorová distribuce povrchových teplot v Českých Budějovicích a okolí

KOTTOVÁ, Šárka January 2017 (has links)
The aim of this study was to detect surface temperature changes in the České Budějovice during last 30 years. The aim was also to asses the influence of vegetation on the surface temperature. The study is based on the thermal data acquired by the Landsat TM 4 and 5 and the study site was in the České Budějovice and surroundings.
50

Vliv teploty na pevnost svařeného a lepeného spoje z materiálu Resysta®

Hrabovský, Štěpán January 2016 (has links)
This master thesis shortly deals with properties and usage of the Resysta material. The main objective of this thesis is to determine a temperature influence on tensile strength of welded and glued joints made from the material Resysta, for an usage such as an outdoor furniture, temperature influence analysis of the joints and to present the results of the analysis obtained by measurements. Further objectives are: tensile strength experiment of material Resysta and to determine influence of placing the pieces in a desk in different directions. Results will serve as a basis for a specific firm; as a basis for deciding between technology of gluing and a technology of welding and also for input for a custom made single purpose machine made for welding of material Resysta. Tests were performed in exposure temperatures -30 °C, 20 °C and 60 °C. We will perform two tests; first test will focus on the tensile strength of glued and welded joints and second one will try to test of tensile strength of Resysta material. Experiments were conducted according to standards ČSN EN 205 and ISO 527-1 on the Instron 3365 testing machine. Laboratory tests showed that values of tensile strength were decreased while increasing the exposure temperature and this was consistent in every test performed. A statistical significance was also confirmed in work piece direction influence on a board. There were higher values of the tensile strength in longitudinal direction than in the transverse.

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