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Time evolution of velocity distribution in the specific area of the calibration channel
Kosík, Ondřej ; Žoužela, Michal (referee) ; Zubík, Pavel (advisor)
This bachelor thesis deals with the verification and determination of the degree of reliability of the calibration track. The mean speed values for individual reference speeds, which ranged from 0,0507-1,4036 m•s-1, were measured by LDA. With increasing speed, the mean square deviation also increased, reaching the highest value of 0,0034 m•s-1. The percentage deviation, which is core value for the given measurement, on the other hand, changed inversely with respect to the mean values of the speed and its values ranged from 0,242-0,473 %.
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The device for temperature sensors calibration
Tomíček, Pavel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
The goal of this thesis is to design a device that allows calibrating temperature sensors. The device is made of a thermal chamber with Peltier module. Part of this work discusses means of temperature measurement, control and regulation. This work describes design of circuit and PCB. The device can precisely control temperature and temperature profile. It can also automatically calibrate Pt100 and Pt1000 sensors. User can control the device either by interface on the device or from a computer. Temperature range inside the thermal chamber is from 7,5 °C to 115 °C with ±0,10 °C error.
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Measurement uncertainties in calibration of vibration sensors
Pražák, Jiří ; Uher, Miroslav (referee) ; Šedivá, Soňa (advisor)
This thesis deals with the research of uncertainties of the vibration sensor calibration measurement. The analysis of individual calibration methods of vibration sensors is also carried out in this thesis. Next, measurement of uncertainties for secondary calibration of the vibration sensors are analysed. The experimental part of this work is focused on determining the influence of different elements to type A uncertainty of vibration sensors uncertainty calculation. Experimental measurement was performed in an accredited laboratory for measurement and calibration of vibration sensors at FEEC BUT. Calculation of uncertainties of secondary calibration is also carried out in this thesis.
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Software sound level meter
Kotalík, Milan ; Říha, Kamil (referee) ; Sysel, Petr (advisor)
V této závěrečné práci se zaobírám problematikou měření hluků. Popisuji lidské vnímání zvuku a vysvětluji základní parametry a veličiny zvuku podle normy ČSN EN 61672-1. Dále se zaobírám problematikou měření zvukových veličin v reálném čase. Vytvářím ucelený soubor funkcí pro měření hladin zvuku v prostředí MATLAB, které se pokouším implementovat v jazyce C++ pomocí jeho JUCE framework.
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Vehicles speed measurement
Schoř, Zdeněk ; Richter, Miloslav (referee) ; Honec, Peter (advisor)
This master’s thesis deals with vehicles speed measurement. The first part is a theoreticalanalysis with an overview of the measurement devices, which are being used nowadays.The second part of the thesis focuses on creating a method for vehicles speed measure-ment in a common traffic situaction. Measurement is based on digital image processingfrom a camera and determining the movement in the image.For movement determination is used license plate detection and other possible methodsare explained in the thesis for future improvement.Created measurement method is using vehicle with known proportions for visual scenecalibration. The MATLAB programming environment is used to detect license plate andfor calibration.Test measurement is conducted in the thesis, which is compared with other referencespeed measurement method.The purpose of the thesis is to use the proposed method to reduce the cost of measuringthe speed of vehicles and contribute to safety and smoothness on the roads.
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Application for Support of Calibration of a Piston Pipette
Vospěl, Bohumír ; Stružka, Jaroslav (referee) ; Orság, Filip (advisor)
This thesis occupies itself with the partial automation of the workflow for calibration of piston pipettes. It analyses the possibilities of the use of the current laboratory gauges, and focuses particularly on the connecting of these devices with a personal computer and their remote control. It also enables the exportation of the measured values into Microsoft Excel application and suggests a complete solution of these problems.
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Calibration of the high-speed traffic microsimulation
Korček, Pavol ; Apeltauer, Tomáš (referee) ; Pospíchal, Jiří (referee) ; Sekanina, Lukáš (advisor)
Tato disertační práce je zaměřena na vysokorychlostní simulace dopravy a jejich přesnou kalibraci pomocí různých typů dopravních dat. Práce se po úvodním popisu motivace pro samotný výzkum nejdříve věnuje současnému stavu poznání, a dále rozdělení simulátorů dopravy, zejména podle typu dat, se kterými se v nich pracuje. Úpravou existujícího řešení je navržen vlastní mikrosimulační model, který je založen na principu celulárního automatu. S tímto novým modelem je pak experimentováno, zpočátku z pohledu rychlosti simulace a další rozšiřitelnosti. Je navržena a popsána technika, kterou je možné navržený model významně akcelerovat a následně provádět simulace rychleji než v reálném čase i pro rozsáhlá území. Práce dále přistupuje k samotné kalibraci modelu, ke které byl využit evoluční přístup. Je představena metoda pro efektivní způsob optimalizace parametrů mikrosimulačního modelu, která nevyžaduje citlivostní analýzu a je schopná nalézt jinak obtížně nastavitelné parametry modelu. Kvalita získaných optimalizovaných modelů byla analyzována jak pomocí makroskopických, tak i mikroskopických dopravních dat, a to i s ohledem na jejich reálné vlastnosti, tj. chybějící vzorky. Dále jsou zhodnoceny výkonnostní a jiné kvalitativní parametry vlastního přístupu v porovnání s existujícími řešeními, přičemž bylo dosaženo významného zlepšení. Nakonec jsou představeny nástroje, které v rámci řešení vznikly. Na závěr je uvedeno další zaměření výzkumu, a to zejména s ohledem na využití výsledků práce v praxi.
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Automatic On-Line Calibration and Calibration Monitoring of Cameras and Lidars
Moravec, Jaroslav ; Šikudová, Elena (advisor) ; Obdržálek, Štěpán (referee)
Title: Automatic On-Line Calibration and Calibration Monitoring of Cameras and Lidars Author: Jaroslav Moravec Department: Department of Software and Computer Science Education Supervisor: doc. RNDr. Elena Šikudová, Ph.D., Department of Software and Computer Science Education Abstract: Cameras and LiDARs are important devices in the automotive indus- try as their combination provides useful information (3D coordinates of a point, its colour and intensity) for perception, localization, mapping and prediction. Successful data fusion and interpretation requires accurate calibration of intrin- sic parameters of the sensors and their 6D relative pose. In this thesis, we present a target-less calibration method on three different calibration tasks. The solu- tion is based on a robust likelihood function constructed over the reprojection error of LiDAR edges relative to image edges. When the calibration slowly wears off, our online recalibration procedure can jointly follow the extrinsic calibration drift with an average error of 0.13◦ in rotation and 4 cm in translation. Based on this recalibration tool, we are also able to monitor the calibration and detect an abrupt decalibration in a couple of seconds. And we also present a fully automatic calibration routine that estimates both the extrinsic and intrinsic...
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Prediction of foundation settlement of high-rise building using the finite element method
Červenka, Jan ; Dobrovolský, Ján (referee) ; Chalmovský, Juraj (advisor)
The focus of this thesis is to deal with reverse engineering of high-rise building settlements. This is modeled via the finite element method performed in the Plaxis 3D program. In the first part of this thesis, a calibration of input parameters of an appropriate material model – Hardening soil – is conducted. This calibration is a result of oedometric test data which were obtained within a geotechnical survey. An influence of soils over consolidation affecting calibration and the material model choice is described. Final values of reference stiffness parameters are used in a mathematical model of the focused area. This model is created for one half of the high-rise building plan, including vestibule. The high-rise building is founded in a foundation pit. The foundations of this building consist of raft foundation and piles of jet grouting. In the model, there are also changes in pore pressure during an excavation of foundation pit included. The functional model is used for parametric analyses, namely examining cases of object´s foundations and the possible influence of foundation pit´s symmetry on the object´s settlement. All the calculated processes in the object´s settlements are then compared to data obtained from geotechnical monitoring of the structure.
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