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Linear active filter of supply voltage „Ripple Blocker“
Vlček, Pavel ; Háze, Jiří (referee) ; Pavlík, Michal (advisor)
This work deals with a methods for increasing the PSRR of the linear active filters of supply voltage or if linear regulators and voltage range of supply, primarily his minimal value. In the work are used ideal parts of reference voltage source and reference current source. The work describes how to eliminate effect of feedback loop on the PSRR, how to decrrease minimal power supply voltage and how to set stability of total schematic.
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Luminaire position influence on measured parameters in integrating sphere.
Vlček, Pavel ; Škoda, Jan (referee) ; Motyčka, Martin (advisor)
This bachelor thesis deals with the influence of the position of luminaires with narrow radiation characteristics when measured in the integrating sphere. The basic light technical parameters are summarized here. Especially, luminous flux, illuminance, solid angle, luminous intesity and luminance, followed by colour temperature and general colour rendering index. This thesis also deals with the measuring instruments, at first with the basic element, which is the photoelement and then with the following instruments: the illuminance meter, the luminance meter, the spectroradiometer, the goniophotometer and the integrating sphere. The thesis is summarization of the basic information about luminaires. This theory is followed by a laboratory measurement that deals with the measurement of luminaires on a goniophotometer and in the integrating sphere. Goniophotometer measurements are important in conditions of acquire accurate luminous flux. The luminous flux from the goniophotometer is compared with the single measured values in the set positions when measured in the integrating sphere. As a result, the position of the luminaire in the integrating sphere is influenced
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Analysis of luminance analyser LDA - LumiDISP application for correlated color temperature measurement
Vlček, Pavel ; Škoda, Jan (referee) ; Motyčka, Martin (advisor)
This master's thesis deals with the search of commercially available luminance analysers and cameras that use the measurement of correlated colour temperature. It also deals with calculations of correlated colour temperature according to various available methods. The luminance analyser LDA-LumiDISP is based on a DSLR camera. The principle of its operation and possible errors in capturing pictures are discussed here. The work deals with extensive testing of the LDA-LumiDISP luminance analyser, which is primarily intended for measuring luminance in the set scene, but can also be used to measure the correlated colour temperature. The device is being tested in terms of measuring the correlated colour temperature in laboratory and field conditions. The result of the master's thesis is the calculation of measurements uncertainty for certain light sources and the optimization of the measuring algorithm to reduce them.
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Design of double stabilized power supply
Vlček, Pavel ; Kubíček, Michal (referee) ; Brančík, Lubomír (advisor)
This work deals with a design scheme of a laboratory power supply with high stability of output voltage and additional protections for safer operation of both powered device and the power supply itself. The work describes complex construction of power supply from the design of scheme in the simulator, through its tuning to the required parameters and the design of mains transformer to the construction and building of resulting device applicable in a laboratory. In addition, measuring and evaluation of achieved parameters, such as the ripple of the output voltage, the velocity of reaction current limitation, velocity of reaction the thermal electronic fuse are given.
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Analysis of luminance analyser LDA - LumiDISP application for correlated color temperature measurement
Vlček, Pavel ; Škoda, Jan (referee) ; Motyčka, Martin (advisor)
This master's thesis deals with the search of commercially available luminance analysers and cameras that use the measurement of correlated colour temperature. It also deals with calculations of correlated colour temperature according to various available methods. The luminance analyser LDA-LumiDISP is based on a DSLR camera. The principle of its operation and possible errors in capturing pictures are discussed here. The work deals with extensive testing of the LDA-LumiDISP luminance analyser, which is primarily intended for measuring luminance in the set scene, but can also be used to measure the correlated colour temperature. The device is being tested in terms of measuring the correlated colour temperature in laboratory and field conditions. The result of the master's thesis is the calculation of measurements uncertainty for certain light sources and the optimization of the measuring algorithm to reduce them.
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Luminaire position influence on measured parameters in integrating sphere.
Vlček, Pavel ; Škoda, Jan (referee) ; Motyčka, Martin (advisor)
This bachelor thesis deals with the influence of the position of luminaires with narrow radiation characteristics when measured in the integrating sphere. The basic light technical parameters are summarized here. Especially, luminous flux, illuminance, solid angle, luminous intesity and luminance, followed by colour temperature and general colour rendering index. This thesis also deals with the measuring instruments, at first with the basic element, which is the photoelement and then with the following instruments: the illuminance meter, the luminance meter, the spectroradiometer, the goniophotometer and the integrating sphere. The thesis is summarization of the basic information about luminaires. This theory is followed by a laboratory measurement that deals with the measurement of luminaires on a goniophotometer and in the integrating sphere. Goniophotometer measurements are important in conditions of acquire accurate luminous flux. The luminous flux from the goniophotometer is compared with the single measured values in the set positions when measured in the integrating sphere. As a result, the position of the luminaire in the integrating sphere is influenced
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Deutsche Nationalpartei - development, program, activity 1919-1925
Vlček, Pavel ; Kubů, Eduard (advisor) ; Moravcová, Dagmar (referee)
Die Deutsche Nationalpartei war eine bedeutende politische Partei der deutchen Minderheit in der ersten Tsehechoslowakischen Republik. Es war eine radikale nationalistische rechts-orientierte Partei, deren Ideenwurzeln von der grossdeutschen nationalen Bewegung herausgingen. Die Partei wurde Ende 1919 gegriindet und sie hatte das Ziel, dass sie alle nationalgesinnten Deutschen in der Tschechoslowakei zuzammenschliesst. Die Idee der Parteigriinder war, dass die Deutsche Nationalpartei zu einer Einheitspartei wird, die dann alle tschechischen Deutsche verträte, wozu aber nicht kam. Die Partei hatte bedeutenden Einfluss an die sogenannten Schutzvereine, durch die sie mehr Einfluss an die Politik der Deutschen in der Tschechoslowakei gewann, als es den Wahlergebnissen entspräche. Die Deutsche Nationalpartei wurde im Verlauf der ersten Hälf'te der 20. Jahren zusammen mit der Deutschen Nationalsozialistischen Arbeiterpartei zum sog. negativistischen Fliigel der deutschen Politik, die die Zusammenarbeit mit dem Tschechischen Staat ständig ablehnte, obwohl die anderen, sog. aktivistischen politischen Parteien andere Stellung nahmen. Als ihr hôchstes Ziel präsentierte die DNP das Selbstbestimmungsrecht, was aber in der Wirklichkeit die Verwirklichung des grossdeutschen Gedankens bedeutete. Powered by TCPDF...
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Design of double stabilized power supply
Vlček, Pavel ; Kubíček, Michal (referee) ; Brančík, Lubomír (advisor)
This work deals with a design scheme of a laboratory power supply with high stability of output voltage and additional protections for safer operation of both powered device and the power supply itself. The work describes complex construction of power supply from the design of scheme in the simulator, through its tuning to the required parameters and the design of mains transformer to the construction and building of resulting device applicable in a laboratory. In addition, measuring and evaluation of achieved parameters, such as the ripple of the output voltage, the velocity of reaction current limitation, velocity of reaction the thermal electronic fuse are given.
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An alternative method of determining the value of the coefficient k6 for valuation of buildings
Kubečka, Karel ; Kubečková, Darja ; Vlček, Pavel
One of the methods that are currently used to determine the estimated value of the forensic expert in the real estate industry (focusing on the economy, real estate prices and estimates), the comparative method. In this method applies, inter alia, the coefficient K6, which reduces or increases the estimated final price determined by expert opinion. Determination of the coefficient K6 is implemented as an expert professional estimate. This price adjustment has its upper and lower limit and is dependent on external factors. The authors provide an alternative method of determining this coefficient method that can significantly eliminate subjective perception and help determine the value of this coefficient. To determine the method was applied risk analysis and SWOT analysis.
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Linear active filter of supply voltage „Ripple Blocker“
Vlček, Pavel ; Háze, Jiří (referee) ; Pavlík, Michal (advisor)
This work deals with a methods for increasing the PSRR of the linear active filters of supply voltage or if linear regulators and voltage range of supply, primarily his minimal value. In the work are used ideal parts of reference voltage source and reference current source. The work describes how to eliminate effect of feedback loop on the PSRR, how to decrrease minimal power supply voltage and how to set stability of total schematic.
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