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Design of EMC optical converter
Štěpánek, Adam ; Hruboš, Zdeněk (referee) ; Krutílek, David (advisor)
Master's thesis is focused on designing optical converter for EMC measurement transfering signal through noisy enviroment. First part contains analysis of electromagnetic interference and its coupling and measurement, especially types of probes for interference maesurement. Next part passing through designing of optoelectric and electrooptic converter with digital intensity modulation. Last part is about realization of optical converter.
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Solar Radiation Measurements
Mazoch, Jan ; Málek, Petr (referee) ; Beneš, Petr (advisor)
This Bachelor's thesis discusses design and verification of an inexpensive method for indicative measurement of direct and diffused solar radiation, in order to estimate the heat gain of buildings. Theoretical part focuses on the analysis of solar energy and types of measuring devices. Practical part presents results of patent research and market research. The design of an ideal solution of a measurement circuit is also presented here. The last chapter concentrates on the practical verification of selected inexpensive sensors. It includes the design of a suitable datalogger and measurement circuit, plus the comparison of measured data with reference sensor. The conclusion is devoted to describing possible solution for the sensor which should be applicable in operating conditions.
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Workplace for testing of the photodiodes
Šedo, Ondrej ; Poliak, Juraj (referee) ; Wilfert, Otakar (advisor)
This paper is focused on design of the workplace for measuring basic parameters and characteristics of standard photodiodes. There is also experimental test of its possibilities and comparison of the measurement results with the catalogue data. It also includes elaboration of an algorithm that processes the measurement data into visual presentation.
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Laser gun and target for shooting sport practise
Poloch, Martin ; Drexler, Petr (referee) ; Friedl, Martin (advisor)
This work deals with complete design of a system for simulating shooting sport. Key aspects of the design are similarity with shooting from classic mechanical weapons, multifunctionality of the system and costs. The core of the simulation is a laser transmitter in the weapon and a photosensitive receiver in the target. One of the key part of this thesis is choosing the most suitable photosensor. The final version of the system is controlled by a group of microcontrollers and provides several types of feedback. For example lighting the place that has been hit with LED, sound signals, displaying shooting results, or evaluating them with a computer.
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Control and monitoring of parameters in microfluidic systems
Meloun, Jan ; Sekora, Jiří (referee) ; Čmiel, Vratislav (advisor)
This thesis discusses the construction of Microfluidic systems for a microscope. The theoretical part of this thesis deals with cell and its survival in the environment. Furthermore, light, light’s behavior and optical spectral analysis in some methods is discussed. Also, the use of the development platform Arduino with wireless data transfer for data visualization is mentioned. Methods for measuring pH are mentioned as well. The practical part is dedicated to the construction of the Microfluidic system with the use of Arduino, smart mobile devices and a developed mobile application including controlling liquid flow with the measured data visualization.
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The multi-channel measuring system for measurement of the relative intensity of light
Damajka, Štěpán ; Havránek, Zdeněk (referee) ; Šedivá, Soňa (advisor)
The aim of the bachelor´s thesis is design and realization of multi-channel measuring system for relative light intensity measurement. The first part of the thesis is devoted to introduction into basic light and its sensor. The next point is to design of measuring system. This system was proposed in respect of input requirements include the ability to set as high as possible level of output voltage, system linearity, DC and AC measurement and signal overload detection. The result of the thesis is fully functional measuring system, which is able to measure 8 channels simultaneously.
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Luxmeter
Velím, Michael ; Sekora, Jiří (referee) ; Rozman, Jiří (advisor)
This thesis deals with the matter of measuring working light with the aim to design a luxmeter with the range of 50 – 1000 lx. The purpose of this device is to define the amount of light in the room. From these measurements we can get the information if the source of the light is good enough for the type of work which is being processed in the room. The thesis has two main parts – theoretical research and practical suggest of completing the device. In the first part the author describes the matter of illumination and tries to state which light source is good for different workplaces. The second part is mainly practical and it deals with the completion of the lumeter. Also it talks about the calibration measurements of the device. The components for this luxmeter were picked up after a literary research. The author also emphasises further characteristics of each component.
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Solar Radiation Measurements
Kokeš, Miroslav ; Krejčí, Jakub (referee) ; Beneš, Petr (advisor)
The aim of this thesis is to design a moderate matrix sensor equipped with photodiodes BPW34 which is used to measure direct and diffused solar radiation. The theoretical framework of the thesis is focused on the analysis of solar radiation, influencing phenomenon and devices used for measuring solar radiation. Practical part of the thesis includes design and selection of suitable parts followed by construction of the device and its testing in operating conditions. The irregularity in design of the sensor caused the error which led to the failure in evaluating of measurement. The overall solar radiation data was measured and evaluated. The conclusion is dedicated to the evaluation of results and possible future plans to redesign the device in order to correct the measurement of all required data.
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Converter with very low input voltage
Jaško, Michal ; Beneš, Petr (referee) ; Havránek, Zdeněk (advisor)
This Bachelor’s thesis describes a design and testing of an increasing direct voltage converter transforming light energy received by a photodiode to electrical energy with sufficient output voltage to power digital circuits. The theoretical part forms an overview of commercial circuits and the Linear Technology LTC3109 and the combination of Seiko S-822Z20 and S-8353D30MC are chosen as suitable for the further research. The function principles of these circuits are described. In the practical part the maximum output power and efficiency dependences on the internal resistance of the power source of the circuits are measured. Based on the results the characteristics of the Linear Technology circuit with different variants of the input transformers are compared. A modified Seiko circuit with an input photodiode is designed and its function is verified by laser diode powering through an optical fiber.
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Luxmeter
Hrbáček, Michal ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
In this work, we introduce tha basics of lighting techniques and methods of measuring working. There is also method of measuring those working intensities and hygiene limits in this working area. Next part of this work will be systém luxmeters with a measuring range from 20 to 1000 lux. Work will include the overall wiring diagram,drawing, process kontrol block and parts list.
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