National Repository of Grey Literature 9 records found  Search took 0.00 seconds. 
Analysis of methods for vehicle speed estimation from video recordings
Woletz, Jakub ; Bradáč, Albert (referee) ; Křižák, Michal (advisor)
The thesis deals with methods that deal with the evaluation of speed from CCTV footage, either from a static camera (e.g. security cameras) or from a dynamic camera (e.g. dashboard cameras). The entire thesis first discusses the various methods available, then shows their application to specific camera footage and evaluates their accuracy. The result of the work is an analysis of the applicability and accuracy of these methods for specific types of video footage.
Vehicles' 3D model making
Pták, Adam ; Mikulec, Roman (referee) ; Křižák, Michal (advisor)
This diploma thesis deals with the issue of creating spatial models of vehicles. The first part of this theses consists of a theoretical introduction, which explains the basic terms and methods that can be used in the creation of vehicle models. This is followed by a section that deals the current state of knowledge in this field of interest. This chapter is followed by a practical part, which deals with the creation of vehicle models using selected methods. In the last section, the findings from the practical part are summarised and evaluated. The aim of the thesis is to create models of several vehicles. On the basis of these models, the following methods are evaluated in terms of time and financial requirements. At the same time, the accuracy of the methods used in the creation of the models and their possible further use is also evaluated.
Measuring of center of gravity change in SUVs due to weight change
Caha, Antonín ; Rak, Martin (referee) ; Křižák, Michal (advisor)
The master's thesis deals with the measurement of the height position of the centre of gravity of SUVs. The thesis describes the change in the centre of gravity of the car, that was determined as a function of the number of passengers and the effect of the load from the roof box. This work in the research section describes the current state of knowledge of the subject. The other part of the work summarises the methods of measuring the centre of gravity position. The main part of the work contains a detailed description of the results obtained in practical measurements of gravity selected SUVs. Then the results are commented in detail and the conclusion summarized the information obtained from the content of the whole thesis.
Measuring the height of the center of gravity of SUV's
Foldyna, Petr ; Mikulec, Roman (referee) ; Křižák, Michal (advisor)
The thesis deals with the issue of measuring the height of the center of gravity of SUV´s. The first part of thesis is devoted to the issue of center of gravity and the influence of the height of the center of gravity on driving stability. Furthermore, individual methods of measuring the height of the center of gravity in passenger cars are discussed. The analytic part of the thesis is devoted to experimental measurement of the height of the center of gravity of selected SUV´s at different vehicle load, by the method of tilting the vehicle on the axle. The results of the measurements showed that the height of the center of gravity for vehicles with a capacity for five people is in the range from 606 to 697 mm. The lowest value belongs to the vehicle Toyota RAV4 Hybrid, when loaded by the driver. The highest value was found for the vehicle Kia Sportage, when loaded by three passengers. The Landover Defender, which is vehicle, that has a capacity for nine people, was found to have a height of center of gravity ranging from 705 to 874 mm. The lowest value was found when loaded by the driver, the highest value when loaded by nine passengers. Only for the Nissan Qashqai was the growing dependence between the load increase and the height position of the vehicle's center of gravity confirmed. A similar trend was found for the Toyota RAV4 Hybrid, Jeep Compass and Landover Defender. The determined values can be used in the analysis of traffic accidents of SUV’s.
Possibilities of Point Cloud and Mesh Model Creation of Accident Site Using Photographs
Mojžyšek, Tomáš ; Bradáč, Albert (referee) ; Křižák, Michal (advisor)
The thesis focuses on creating point cloud and mesh model of chosen intersections and their applications in forensic-engineering praxis. In the first part, we describe a workflow for creating point cloud and mesh model of intersection by digital photogrammetry. In the second part, we applied these at chosen intersections. Which leads us to the comparison of three digital photogrammetric programs which we used to make point clouds and mesh models. At the end of thesis, we use our mesh models in forensic-engineering praxis and we decide about barriers in sign conditions at intersections.
Risk Assessment of the Selected Meteorological Phenomena and Their Influence on Transport Safety
Stiburková, Lucie ; Křižák, Michal (referee) ; Rožnovský, Jaroslav (advisor)
This thesis is focused on assessing the impact of meteorological phenomena on transport safety. Analysis, questionnaire survey and meteorological forecasts were used for the evaluation. Part of the theoretical part of the thesis includes basic legislative regulations, meteorology and accident theory, playing an important role in the general transport.
Driver’s behavior while passing through pedestrian crossing analysis
Kledus, Robert ; Semela, Marek ; Maxera, Pavel ; Kunovský, Martin ; Křižák, Michal
The article deals with analysis of 8 drivers’ behavior while driving through pedestrian crossing during dusk and night. Monitored vehicle passes through modern crosswalk in urban area that is marked with horizontal and vertical road signs. The crossing is illuminated from left side from the direction of travel. Pedestrian is protected with safety island, which is marked with “passing on the right” mandatory sign, in the middle of the road. Optical reactions on various stimuli are monitored while driving with the help of the specialized device Viewpointsystem®, GmgH for monitoring changes of driver’s viewing angle. Drivers’ behavior strategies when passing the crosswalk are compared in this thesis. Monitored are driver’s navigation while driving and his reaction on the crossing pedestrian. Dangerousness of each driving situation is assessed and each strategy is evaluated. Results of this analysis are based on extensive driving tests that were realized in close cooperation of Institute of Forensic Engineering, University of Technology in Brno and research institute EPIGUS – Institut für ganzheitliche Unfall- und Sicherheitforshung from Austria in year 2010.
Using Computer Support when Dealing with Pre Crash Vehicle Movements
Křižák, Michal ; Semela, Marek (referee) ; Tokař, Stanislav (advisor)
Thesis deals with comparison of influence of chosen solution method on pre crash movement of vehicles in one simulation program and on differences between calculations for one method in different programs. Compared solution methods are kinematics and dynamics solutions of pre crash movement, compared programs are Virtual CRASH and PC-Crash.
Integration of XFOIL software in MATLAB environment
Křižák, Michal ; Zikmund, Pavel (referee) ; Dofek, Ivan (advisor)
Thesis is concerned with program which is able to run and control XFOIL from MATLAB environment. This program is focused on bulk data processing and plotting of XFOIL results. Thesis is also concerned with brief description of XFOIL and MATLAB, description of profile characteristics and comparison numbers used in calculation by XFOIL.

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