National Repository of Grey Literature 476 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Effect of stress on pilot performance
Dedinský, Miroslav ; Zikmund, Pavel (referee) ; Šplíchal, Miroslav (advisor)
The main goal of this diploma thesis is to find out whether it is possible to measure stress during piloting. If so, it would be possible to develop systems that could help pilots in stressful situations and thus alleviate the stress, this would have great impact and possitively improve work performance. There are few similar studies in the field, the stress factors that affect the pilots and what physiological changes are observable in such situations. Finally, an experimental measurement is performed during three flights, which is aimed to demonstrate the information obtained and thus the possibility of measuring stress and the metod to do so.
Optimization of ultrasonic leak detector of pneumatic system
Macků, Ondřej ; Mazal, Pavel (referee) ; Vlašic, František (advisor)
The thesis deals with design and optimization of exchangeable modules for localization of air distributable ultrasound in concept of ultrasound probe design. Several series of these modules were manufactured using the technology of rapid prototyping and tested on artificially created source of air leak. Based on these verification experiments two types covering wide use for identification of pneumatic systems leaks were selected and modified. These two types are long range module for more accurate and expended reach of the leak detection and focusing attachment for narrowing the received range of scanning module and elimination of surrounding ultrasound. Part of the thesis is also analysis of the acoustic signal processed by modern acoustic emission analysers which allow besides standard parameters recording also continuous sampling up to 10 MHz and design solution for attachment of add-on modules to the detector. The thesis is beneficial for raising awareness of leak measurements, prototype manufacturing by using the 3D printing and designing and manufacturing of modules.
Design of stand for torque measurement
Zerzánek, Ondřej ; Zeizinger, Lukáš (referee) ; Čípek, Pavel (advisor)
This bachelor thesis deals with design of stand for torque measurements and additional fixtures. Issue is realized by aluminium profile systems and manufactured or purchased parts. Solution takes in account limited manufacturing options. Final part of this thesis is 3D model and critical evaluation of design. This thesis is useful example of how to create torque stand instead purchasing expensive commercially available stand.
Calibration of Surveillance Camera
Pištělák, Radek ; Hradiš, Michal (referee) ; Herout, Adam (advisor)
This work aims the issue of calibration of cameras, more precisely surveillance cameras, that monitor Ćat areas such as car parks. The calculation is based on several measurements of the same distance over the entire Ąeld of camera view. From the obtained set of measurements, the properties of the camera are calculated so that it is able to measure distances. With this approach, an error of 1.6 % was achieved, which was calculated by substituting back into annotated and unannotated images in the main experiment. The result of the work is a way to calibrate the camera with a view of large spaces, for which other methods of calibration could be difficult.
Simulation And Measurement Of Mach-Zehnder Interferometer
Cucka, Milan ; Salik, Pavol
The paper focuses on simulation and measurement of Mach-Zehnder interferometer. This type of sensor is used as a distributed fiber optic sensor for sensing vibration, mechanical tension and temperature. Fiber optic sensors based on optical interferometry are now widely used, e.g. Sagnac interferometer in optic gyroscopes. Mach-Zehnder interferometer is used for measurement of transformers temperature. The article includes a simulation of interferometric systems in VPIphotonics simulation software and it also includes scientific notation of a signal and a short description of the used simulation systems.
Serial Bus Utilization For Smart Meters In Home Area Network
Slacik, Jan
This paper focuses on possibilities of using data from smart meters for home area network applications. Data communication between a smart meter and a consumer for home area network can be done directly witout dedicated communication channel for remote data acquisition. The seriál interface can be used for user data readout, depending on the support of the meters. This paper demonstrates experimental measurements of RS-485 serial bus, with the main objective to find a comparison of different bus configurations and different distances. The main contribution is recommendation of the best RS-485 setup of resistors configuration for home area networks.
Measurement of weak magnetic field in 3D space
Bár, Martin ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
The aim of this thesis is to theoretically examine the magnetic field of miniature cylindrical NdFeB magnets, compare the simulation results to real-world measurements, and design a magnetic field probe using suitable sensors. A FEM simulation was conducted using Ansys AIM and FEMM 4.2. The simulation shows that the magnetic induction on the surface of the magnet depends on the diameter/height ratio. The simulation results also show that 21 µm thick protective layer of Ni-Cu-Ni metal on the surface of NdFeB magnets lowers flux density of the smallest magnet sample (1x1 mm) by up to 14 %. It was also concluded that a larger magnet edge radius results in a higher flux density on the surface of the magnet. The biggest differences between simulation data and data measured by the F.W. BELL gaussmeter occurred in the smallest magnet sample. Using the FEMM 4.2 simulation software, a three-axis magnetic field probe was designed. Potential problems with this probe design have been identified. A simple procedure for probe calibration was proposed.
Cloth moisture monitor
Prokop, Jan ; Jirgl, Miroslav (referee) ; Bradáč, Zdeněk (advisor)
The aim of this thesis is design and construction of cloth moisture monitor. This is the experimental device, which should be used to real time detection of urine leakage of patient and children. Principle of this device is measuring conductibility of moistured cloth. In the theoretical introduction, important methods of moisture measurement are discussed and compared in terms of cloth moisture detection. Signal processing is provided by a microcontroller, which displays humidity on the display and alerts audibly. The device is able to accurately measure humidity and allows you to set the humidity level on an audible alert.
Visual inspection of axial bearing
Sýkora, Vojtěch ; Richter, Miloslav (referee) ; Janáková, Ilona (advisor)
This thesis is about visual control and measurement of bearings by using image sensors and it is about providing appropriate conditions for this measurement. It describes the selection of suitable hardware to solve this case. A large part of the thesis is the design and creation of my own light. Furthermore, algorithms for processing the acquired images of bearings are proposed. The result of the processing is the determination of the type of bearing in the image and the finding of possible defects.
Surge arresters, their construction and use in power system
Novický, Marek ; Pelikán, Luděk (referee) ; Orságová, Jaroslava (advisor)
The bachelor thesis deals with the means used to protect the equipment from the effects of overvoltage. The first of the thesis outlines basic information regarding the used overvoltage protections in the distribution system. The thesis also features the practical part outlining measurements carried out on the surge arrester. The last chapter deals with the dimensioning of the surge arrester in the high voltage distribution system.

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