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Diagnosis warming selected parts of an electric machine
Prezbruchý, Martin ; Skalka, Miroslav (referee) ; Veselka, František (advisor)
This work is describing warming parts of an electric machine. In the first part, it is describing heat and temperature, its origin and radiation. Work is carrying on with the problems of heat origin in electric machines and in selected parts of an it. In the next part, the work is describing measurment and devides it in contact and contactless. The third part is dealing with electric machines and considers commutator motors. Work continues with practical part, which describes measurments on selected electric machine, includes calculations and graphs. After this part, work is dealing with temperature allocation in graphic interface and describes a 3D model production. In the conclusion, it is evaluating the measurment achievements and comparing the results of various used metods.
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Apparatus for measuring the thermal resistance of the gloves
Pelikán, Jakub ; Fišer, Jan (referee) ; Hejčík, Jiří (advisor)
This thesis deals with common problem health protection at work. Namely hand protection during the work in very cold environment. It’s an analysis of materials suitable for apparatus used for measuring the thermal resistance of the gloves. There was analysed a range of materials. Every single sample was tested for heat conductivity and afterwards was assessed the suitability of materials. Heat was generated by electricity. Ocured heat fields was assessed with thermocamera. After performed experiments of carbon fiber we haven’t reached any satisfying results which we could use for manufacturing of this device. On the other hand kapton film has given very interesting results which we would recommend eventually. Kapton film needs to be modify according to the method listed in the conlusion. This thesis gives us a clear overview and inspiration for additional research of this device. It finds it’s place in research facilities and companies manufacturing protective clothing.
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Thermography in engineering
Koten, Jakub ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
This work deals with non-contact measurement of surface temperatures. The aim of the first part is to explain basic terms, principles and ways of measuring temperature. Furthermore, there is an overview of thermal imagining cameras usable in industry. In the practical part there is a theoretically suggested experiment, which monitors the dependence of the surface temperature on the size of the cross-section of the workpiece during the turning under unchanged cutting conditions. Experimental measurements are executed with using thermocamera ThermaCAM SC 200 and they are evaluated in software called Researcher.
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Human recognition on thermal images
Jančuš, Rastislav ; Babinec, Tomáš (referee) ; Petyovský, Petr (advisor)
This half-yearly project includes basic briefing about thermovision technics and color models. Analyses functions and concepts for correct settings thermal camera on create images, which are included people. This work contains acquaintance with thermal camera EasIR-4, which was created database testing images, and with software Guide IrAnalyser shipped with this camera. The third part this project includes process about creating color models of skin and algorithm for identification people in thermal images, which emanate from human temperature and color skin. This algorithm is realized in program Matlab.
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Experimental thermocamera measurements
Jakl, Oldřich ; Číp, Pavel (referee) ; Petyovský, Petr (advisor)
This work is focused on the features and the principles of the measuring of the thermovision cameras. There is the identification of the basic notions and physical laws on which is based the operation of the thermovision cameras in the first part of my work. In the second part there is describtion of the function of the detectors of infrared radiation and the character of the output data of the thermovision camera. Further there are presented the experiments and the observations which bring us closer to the features of the thermovision cameras and help us interpret the data gained by camera.
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Experiments with Face Thermograms
Kočár, Radek ; Orság, Filip (referee) ; Drahanský, Martin (advisor)
This thesis describes characteristics and usage of face thermograms. First part of thessis introduces historcal development of thermal imaginery. Thesis continues with theory for thermographic measurement techniques, physical theory and methods for face detection, localization and recognition. Last chapter describes experiments with thermograms and possibilities for application of thermography.
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Temperature measurement in electric machines
Halfar, Ivo ; Huzlík, Rostislav (referee) ; Janda, Marcel (advisor)
The bachelor's thesis Temperature measurement in electric machines deals with beginning and exuding of the heat of electric motors and measuring of the temperature. The temperature is one of the most important values in diagnostic. High temperature could damage an isolation and it could tend to destroy of the whole machine. The temperature influences their magnetic properties on motors with permanent magnets. If you reach the Curie temperature it could come to its demagnetisation. Measuring of the temperature is important to verify allowable warming of motor or more precisely its spooling. The measuring of the temperature is needed for making motors with minimum of charges and its worth at the end. We could use two methods for measuring the temperature. It is contact and noncontact method. Warming and decomposition of the temperatures it is possible to appoint also with help of theoretic computations which are getting of the method of final elements. A lot of computer programs is using this method. Because of the existence of many sorts of electric motors, one of the viewpoints is the principle of working, another one is the construction. I concentrate on problems of asynchronous motors. In this bachelors thesis I have done theoretical calculation and contact and noncontact method of measuring of warming of the asynchronous motor.
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Non-contact measurement of surface temperatures during machining of metal materials
Trojan, Jiří ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
This Master’s thesis deals with non-contact methods of surface temperature with machining metal materials. This work contains summary of basic terms and description of thermodynamics laws. Furthermore, the work present criteria for selection suitable measuring equipment. In the second part of this work is described experiment focused on drilling technology and measurement dependence of temperature on different cutting speed for different drilling approaches. At the end are presented the results.
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Study of thermal properties of materials for solar cells lamination
Dohnalová, Lenka ; Matiašovský, Peter (referee) ; Zmeškal, Oldřich (advisor)
The topic of presented bachelor´s thesis was study of thermal properties of materials for solar cells lamination. The main goal of this thesis was measuring and characterisation of the basic thermal properties of volume materials and plastic films, which are used to solar cells lamination. At first a thermal response to a concrete thermal pulse was measured by the thermoelectric thermometer. Then there was studied the distribution of temperature on the surface of a sample during heating and cooling by the non-point heat source. At the beggining of this thesis it was needed to define heat and ways it´s spread, then the basic thermal properties and also methods of their determination. The ways of measuring temperature were described and then used in praxis. My thesis deals with study of thermal properties volume materials. It was needed to characterize measured volume material and define it´s thermal parameters, because the values of thermal parameters of measured samples of lamination films were compared to these values. This thesis is concerned in solar cells too. So there were also described their structure, properties, utilization and way of their production. After the definition of all needed therms the experimental part of this thesis was begun. At first the thermal response of each of the eight different samples was measured by the pulse transient method. Then there was studied the thermal field on the surface of the sample by thermocamera through using the pulse transient method. Findings of both methods were finally compared.
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