National Repository of Grey Literature 18 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Design and Construction of Your Own Robot Chassis
Janečka, Jan ; Hájek, Josef (referee) ; Drahanský, Martin (advisor)
This diploma thesis deals with the study of different robotic chassis types, their properties and selected types of sensors, including their characteristics. Furthermore, the design and implementation of my own robotic chassis is presented. This robotic chassis was realized and all plans and production drawings are presented in my thesis. The software ( rmware) for the control of my robotic chassis, including obstacle avoidance, is described in detail. The following chapter deals with tests of my chassis in various situations. The maximal and minimal limits of the realized robotic chassis are discussed in the final chapter.
Generation of the Mathematical Excercises for High Schools and Elementary Schools
Janečka, Jan ; Straka, Martin (referee) ; Kaštil, Jan (advisor)
This thesis is considering genetic algorithms as a~means for generating math exam exercises for elementary and high schools. There are two kinds of exercises implemented: linear equations with variable in numerator and verbal rider about movement. Each of of these exercises offer several options to tune. Output generated by this implementation consists of two pdf files - one with plain exercises and one with solutions to each one of them.
Device Proposal for Measurement and Evaluation of Environmental Thermal State
Janečka, Jan ; Němeček, Pavel (referee) ; Kratochvíl, Zdeněk (referee) ; Vdoleček, František (advisor)
The thesis deals with evaluation of the environmental thermal state in closed rooms with people inside the room. The achievement of thermal comfort is related to thermal balance of human body. People are producing heat during their work, which has to be carried away from the body to surrounding area by radiation, convection, conduction, respiration and evaporation. The intensity of heat removal is influenced by environmental parameters, especially by air temperature, mean radiant temperature, air velocity and humidity. Personal factors as energy expenditure of human body and clothing resistance are influencing the intensity of heat removal as well. People are able to influence the thermal comfort by their behaviour in given environment, appropriate clothing and regulation of basic environmental parameters. CSN EN ISO 7730 standard states that environmental parameters should be estimated or measured. The operative temperature is than evaluated from collected data. This operative temperature is defined as the temperature of black enclosed area where the human body will be by convection and radiation sharing the same amount of heat as in real inconsistent environment. Nowadays on the market there is no cheap solution for sensor which is able to evaluate the operating temperature and could be used in buildings. There are a lot of professional sensors which have very high accuracy, but are very expensive. Therefore are mainly used only for research or for single and exceptional measurement of environmental thermal state in rooms. The thesis is therefore focused on proposal of suitable (compact) operative temperature sensor assembled according to valid regulations and standards. Emphasis is placed mainly on the sensor price together with guarantee of sufficient accuracy. The proposed sensor is providing information to control system which is than able to adjust the parameters of environment using appropriate way based on relevant requirements. Here is some space for energy savings due to possible continuous measurement and evaluation of environmental thermal state in different rooms. Therefore, during continuous measurement no unnecessary rooms overheating in winter as well as unreasonable cooling in summer should occur. This research and solution is than reflected in reduction of energy consumption used for building operation and subsequently reduction of the pollutants production. This issue is being watched with increasing interest. Another advantage is that whole system is able to work autonomously without human intervention. People no longer have to continuously adjust air temperature because the control system is able to evaluate the most appropriate adjustments based on objective data obtained from the sensor. The thesis includes subsequent verification of proposed sensor as well as the definition of sensor technical parameters including analysis of measurement uncertainties.
Device Proposal for Measurement and Evaluation of Environmental Thermal State
Janečka, Jan ; Vdoleček, František (advisor)
The thesis deals with evaluation of the environmental thermal state in closed rooms with people inside the room. The achievement of thermal comfort is related to thermal balance of human body. People are producing heat during their work, which has to be carried away from the body to surrounding area by radiation, convection, conduction, respiration and evaporation. The intensity of heat removal is influenced by environmental parameters, especially by air temperature, mean radiant temperature, air velocity and humidity. Personal factors as energy expenditure of human body and clothing resistance are influencing the intensity of heat removal as well. People are able to influence the thermal comfort by their behaviour in given environment, appropriate clothing and regulation of basic environmental parameters. CSN EN ISO 7730 standard states that environmental parameters should be estimated or measured. The operative temperature is than evaluated from collected data. This operative temperature is defined as the temperature of black enclosed area where the human body will be by convection and radiation sharing the same amount of heat as in real inconsistent environment. Nowadays on the market there is no cheap solution for sensor which is able to evaluate the operating temperature and could be used in buildings. There are a lot of professional sensors which have very high accuracy, but are very expensive. Therefore are mainly used only for research or for single and exceptional measurement of environmental thermal state in rooms. The thesis is therefore focused on proposal of suitable (compact) operative temperature sensor assembled according to valid regulations and standards. Emphasis is placed mainly on the sensor price together with guarantee of sufficient accuracy. The proposed sensor is providing information to control system which is than able to adjust the parameters of environment using appropriate way based on relevant requirements. Here is some space for energy savings due to possible continuous measurement and evaluation of environmental thermal state in different rooms. Therefore, during continuous measurement no unnecessary rooms overheating in winter as well as unreasonable cooling in summer should occur. This research and solution is than reflected in reduction of energy consumption used for building operation and subsequently reduction of the pollutants production. This issue is being watched with increasing interest. Another advantage is that whole system is able to work autonomously without human intervention. People no longer have to continuously adjust air temperature because the control system is able to evaluate the most appropriate adjustments based on objective data obtained from the sensor. The thesis includes subsequent verification of proposed sensor as well as the definition of sensor technical parameters including analysis of measurement uncertainties.
Measurement of Frekvency Stability of Funktion Generators
Šmídek, Miroslav ; Janečka, Jan (referee) ; Havlíková, Marie (advisor)
This work treat of problems uncertainties metering and plotting short - term frequency stability functional generators adze BM 492, Newtronics 200 MSP and Agilent 33120A. The parameters short - term frequency stability are obtaining universal counter HP53131A.
Accuracy of non-contacting Temperature Measurement
Horák, Ladislav ; Janečka, Jan (referee) ; Vdoleček, František (advisor)
This master’s thesis is specialized on the influence of correct parameters of emissivity, which depends on the temperature, wavelength and ambient environment. The investigation the parameter was taken infrared non-contact thermometer MI3 from company Raytek. To improve the quality of measurement was designed and programmed measuring utility program. The program was developed in the LabView 8.5 programming environment. To obtain the true value of the measured temperature of the target was designed and constructed the touch thermometer with the resistance dependent sensor. The thermometer is connected to the communication box of infrared thermometer and contain the same program. Nowadays are the most advanced IR thermometer with fixed parameters emissivity, which is applicable just to the real body in the vicinity of the parameter emissivity 0,95. For those IR thermometers were designed correction function, which would have temperature measured at a fixed emissivity parameter 0,95 set close to the actual value of the object.
Concept of Temperature Measurement System on Heat Pump Test-room
Macháčková, Petra ; Janečka, Jan (referee) ; Vdoleček, František (advisor)
This work deals with design of temperature measurement on heat pump test-room. Discusses diferent various variants of thermometers and their placements in measurement circuit. It contains sample software for control and processing of measured data on the test-room, which is controlled by the computer and built-in data acquisition card.
Uncertainties Analyze of Indirect Measurement
Fišr, Petr ; Janečka, Jan (referee) ; Vdoleček, František (advisor)
This diploma thesis is engaged with problems of expressing measurement uncertainty especially for indirect measurements. This issue is shown here on a few simple examples. Part of this work is a calculation module for the determination of measurement uncertainties, applied to the role of the laboratory 'measurement of the flow orifice.
Correction and Compensation in Temperature Measurement
Zábranský, Jaroslav ; Janečka, Jan (referee) ; Vdoleček, František (advisor)
The temperature belongs to the one of the basic values for a commercial measuring processes. The exact measuring of the temperature is the essential for a multitude manufacturing procedures and their regulations. This study is mainly focused to determine what influences can take the negative effect to exact temperature measurement. Content: List of of possible mistakes and their compensation wit the special focus on a notorious and frequent dynamic errors. Characteristic of those dynamic properties are important to analyze all the possibilities to correct different measuring systems. In this study we also present the simple model to deal with some error corrections
Mean Radiant Temperature Measurement
Truksa, Lukáš ; Zuth, Daniel (referee) ; Janečka, Jan (advisor)
This work is focused on parametry environment. In particular, this work is focused on the mean radiant temperature, which is a parameter with good meaningful capabilities. In The work we introduce with some ways mean radiant temperature measured and what are currently the sensor for this measurement. An integral part of this work is also Introduce the human thermal comfort, which plays an important role in measurement mean radiant temperature. In another part of the thesis is done propose a simple sensor for measuring the mean radiant temperature. And with other devices that are designed to measure the mean radiant temperature is verifying its functionality.

National Repository of Grey Literature : 18 records found   1 - 10next  jump to record:
See also: similar author names
1 Janecká, Jana
2 Janečka, Jaromír
1 Janečka, Josef
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