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Spectrum Analyser N1996A-503 and Measurement Uncertainty
Trojan, Martin ; Uher, Miroslav (referee) ; Havlíková, Marie (advisor)
The main target of this master’s thesis is to introduce the reader with the spectrum analyzer, Agilent N1996A CSA. This work explains all the functions of this measuring instrument, control elements and presents some technical parameters. The next part of this thesis deals with the measurement of coaxial cables, so that is why a whole chapter is devoted to coaxial cables and conductors in general. The rest of this thesis deals with issues of measurement uncertainties. This part contains the general procedure for the evaluation of uncertainty, followed by a practical part. The practical part contains measurement of distance to fault and return loss. Measurements were made on 4 samples of coaxial cable. At the end of the practical parts the measured values including the uncertainties and results are summarized in the final paragraph.
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Software interface for database files
Novák, Adam ; Boštík, Ondřej (referee) ; Uher, Miroslav (advisor)
The bachelor thesis deals with the way how to access database files with the extension (* .shk), (* .sin) and (* .rau) based on Microsoft Acces 2.0. Document these files and create a software interface. The interface creates the given types of database files. Uploads measurement settings to RMS device measurement files. After the measurement, it extracts data from the database, which can then be further evaluated.
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Laboratory device for courses BPC-VIA/MZPD
Platko, Peter ; Uher, Miroslav (referee) ; Čala, Martin (advisor)
Bachelor's thesis deals with design of laboratory device for BPC-VIA and MZPD courses, device works with data-aquisition card NI myDAQ and LabVIEW enviroment. Document consists of description of NI myDAQ, description and design of waveform generator, description and design of sensor circuits for temperature, humidity, illuminance, revolutions, noise and vibrations. Then a design of device and it's power source, buttons and fans, design of PCB and price calculation. The last chapter describes example programs that are made in LabVIEW enviroment and use signals from device.
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LED stroboscope speed meter
Krampoťák, Štefan ; Uher, Miroslav (referee) ; Beneš, Petr (advisor)
The bachelor´s thesis is dealing with design and realization of contactless rotation sensor based on stroboscope method. As the source of the light should be used power LED. The first part briefly deals with the scanning speed and a more detailed description of the stroboscope method, it´s advantages and disadvantages. The second part of this thesis is about designing and implementation of the measurement device, i.e. designing the block diagrams, electric circuit designing and the execution itself. It analyzes each part of the electric circuit and justifies their selection and design. In the last phase of this bachelor´s thesis is made the measurement of the device and were determinated it´s properties.
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Flow measurement of air by multiport averaging probes
Šimák, Jakub ; Uher, Miroslav (referee) ; Šedivá, Soňa (advisor)
Master work deals with the measurement of fluid flow (particularly air) pipe, with orifice and multiport averaging probe. The theoretical part is followed by practical, which verifies the properties of the measured system. In a next part of semestral work are verifies the properties of multiport averaging probes Vavra s.r.o. MQS-011 and Rosemount Annubar 485. Measured values from probes are compared.
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Simulation and determination of permanent pressure loss for the normalized orifice plate
Šimberský, Michal ; Uher, Miroslav (referee) ; Šedivá, Soňa (advisor)
This master’s thesis deals with the simulation of flow through the normalized orifice plate. There is described flow measurement with flowmeters, which reduces the cross-section of the pipe and causes the pressure difference before and after the flowmeter. Following is a description methods of modeling of turbulent flow and a description of software for the simulation of flow from the company Ansys. The theoretical part is followed a practical part, which is focused on determining the permanent pressure loss caused by the orifice plate and the verification of straight pipeline lengths between orifice and obstacle.
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Automation of access to test files for the vibration system
Dolobáč, Dávid ; Richter, Miloslav (referee) ; Uher, Miroslav (advisor)
The aim of this thesis is to analyse structure of test files used in vibration tests in the CVVOZE testing laboratory and to design and implement a software solution that ensures automation of access to these files. The proposed software solution in the form of a desktop application completely automates the original manual entry and acquisition of test data using the created SQLite databases and provides the test technician with an alternative to the existing RMS software.
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Automatic switch control unit
Zlý, Marián ; Uher, Miroslav (referee) ; Havlíková, Marie (advisor)
The main topic of this Master's Thesis is design and implementation of automatic range switch AC/DC Transfer Standart Fluke 792A. In the first part is introduce and description of character and the parameters AC/DC trasfer Standart Fluke 792A and design of the Automatic range switch for this equipment. In the next part is introduce design and description of realize automatic switch control unit it has comunication faculty witch PC over GPIB bus. In the finish part is show of the theoretic description for GPIB bus and her realization with helped microcontroller Atmega16.
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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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