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Temperature Profile in Reflow Soldering and Influence of Different PCBś and ComponentsThermal Capacities
Procházka, Martin ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
This thesis mainly deals with the prediction of temperature on the components and the PCB during reflow soldering. The theoretical part describes the particular solder reflow process, types of heat transfer and temperature profiles. The practical part is divided into forecasting temperatures if the conveyor is stopped and the temperature predictions when the conveyor is in motion. In both parts of the measured temperature is compared with the predicted temperatures, which show the success rate of prediction. The last part of this work is part of the simulation, which helps in proper understanding of the issues discussed.
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Measurement of thermal field in electric machines
Dostálek, Martin ; Vítek, Ondřej (referee) ; Janda, Marcel (advisor)
Diagnosis temperature is one of the most important disciplines. We meet it in everyday life, but it is very important for all sectors of industry. This is a measurement providing an immediate state of the measured object. Contact measurement of different temperature sensors and contactless measurement using thermal imagers. The important part is the measurement of temperature rise of induction motor. Part of the work deals with losses in the electric motor. These losses are converted into heat, which affects from various parts of the machine. Correct identification of the temperature field is important in helping to design the cooling system of the instrument. Virtually the data obtained are compared with theoretical data. We will capture part of the device and realize thermal simulations in a suitable simulation program. We propose modifying the cooling machine and the resulting data from the simulation compares.
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The equipment for control very low temperatures during the detection defects of solar cells
Stojan, Radek ; Bača, Petr (referee) ; Vaněk, Jiří (advisor)
This work deals with measuring of very low temperatures during the detection defects of solar cells by photoluminescence method. Liquid nitrogen is used to cooling solar cells. Properties of liquid nitrogen and safety of handling are described in this work. Themperature in cryo area is measured by the thermocouple senzors. A main part of this work was to concept and creation of equipment for themperature controling in cryo technique. This equipment signalling danger scorch in low temperatures. The device was created to complement work place for the detection defects of solar cells by photoluminescence method.
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Methods for measuring exhaust gas temperature before turbocharger
Vajdák, Martin ; Jaroš, Michal (referee) ; Štětina, Josef (advisor)
This bachelor´s thesis deals with the measurement of exhaust gas temperature before turbocharger in Honeywell laboratories. In the introduction of thesis the general methods of turbocharging are described. The following sections deals with the temperature measurement generally, issues of insertion thermocouples in measuring section and their connection. Another part is devoted inaccuracies, which may occur during the measurement, and also ways of their elimination. The main part of the thesis consists of sixth chapter in which major, but also smaller influences, are analyzed in details and cleared up with examples, because this influences are the source of inaccuracies during the temperature measurements. These influences are especially different wall temperature of measuring section and the flowing exhaust gases and influence of thermocouple emissivity change over the time.
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Application of Thermoelectric Module for Temperature Control
Gofroň, Vojtěch ; Andrš, Ondřej (referee) ; Houška, Pavel (advisor)
This bachelor thesis describes the possibilities of use thermoelectric modules for temperature control in a temperature chamber. In the theoretical part are shown physical principles of thermoelectric cooling, heating and power generation. The main part regarding thermoelectric modules describes its design, use and important parameters for temperature control. The next chapter is focused on measuring of quantities important for temperature control using thermoelectric modules. The last part describes few proposals of a temperature chamber design.
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Temperature measurements with thermocouples
Hyrš, Jan ; Kandus, Bohumil (referee) ; Podaný, Kamil (advisor)
The work is aimed at measuring temperature with thermocouples. Brief is made introduction to its basic measurement and distribution. The principle function of the thermocouple is explained, and also describes its basic properties. The paper also described how they integrated into a circuit. Performed an overview of the use of thermocouples in practice, indicating illustrative examples. In conclusion, it is processed and evaluated executed experiment temperature of hotplate´s stove.
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Design of education model of termocycler
Smělý, Jakub ; Sikora, Michal (referee) ; Vlach, Radek (advisor)
This work describes the design of the learning model thermocycler. Measurement and control of temperature trends by measuring MF624 card and computer in real time. They are described thermoelectric phenomena associated with the operation of Peltier elements and measured using thermocouples.
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Temperature measurement
Brzobohatý, Lukáš ; Kandus, Bohumil (referee) ; Podaný, Kamil (advisor)
ABSTRACT Brzobohatý Lukáš: Temperature measurement The work presents a comprehensive overview of measurements of one of the basic state function determining the state of matter - the temperature. It deals with development of temperature scales, units and measuring devices. Temperature measurement is divided into two basic ways - contact and non-contact method. Contact measuring devices emphasis on thermocouples because of their indispensability in all industries. Non-contact temperature measurement is most developing method. This corresponds to the devices development, which is determined by the rapid computer technology development.
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Non-contact Temperature Measurement
Lata, Miroslav ; Janečka, Jan (referee) ; Vdoleček, František (advisor)
The object of this bachelor thesis was to create a study of development non-contact temperature measurement and show methods of measurement in infra-red radiation area. The beginning of this work is focused on major notions and definitions necessary to introduce non-contact temperature measurement topic. Other interest of this work was to mention possible error rate of measurement, it’s reasons then name some ways of calibration of a measuring equipment with it’s reasons too. Last part of this thesis was focused on a practical using of these measuring devices.
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