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Use of the DIC method in solving basic problems of solid mechanics
Hrůza, Vlastimil ; Pokorný, Jan (referee) ; Ščerba, Bořek (advisor)
This bachelor’s theses deals with the solution of basic problems of solid mechanics using digital image correlation. The research part of the thesis presents some of the optical methods used for deformation measurement, digital image correlation in particular, whose history, principles, limitations and utilizations are described in detail. In the practical part of the theses, three experiments are carried out, which are then evaluated using digital image correlation and the results are compared with the created computational models. In the first experiment, strain on the tensile test specimens with notches is measured, the second experiment is focused on measuring strain when bending curved beams and in the final experiment, natural frequency of a fork produced by 3D printing is determined.
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Determination of an area and proportions of selected objects in a picture
Mittner, Ondřej ; Stančík,, Petr (referee) ; Říčný, Václav (advisor)
The master’s thesis describes hardware opto-electronic instruments for contactless measurement of surfaces. It concentrates on instruments used for opto-electrical transformation of a taking scene and software processing of digital pictures. It presents selected methods of pre-processing, segmenting and following final modifications of these pictures. Then it deals with measuring of areas of surfaces and sizes of selected objects in these pictures and conversion of results from pixels to SI system of units. Possible divergences of measuring are described as well. A flow chart of a program for automatic and manual measuring of surfaces and sizes of objects in a picture, which is commented in detail, is a part of the thesis. The main product of this thesis is application Merovo, which provides measuring of an area and proportions of included objects. This application is analysed and described in detail in this thesis.
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Contactless measurement of operational deflection shape
Tomek, Tomáš ; Klusáček, Stanislav (referee) ; Beneš, Petr (advisor)
This bachelor's thesis provides an overview of 2D/3D laser scanners used in measuring operating deflection shapes. Describes the issue of measuring the operating deflection shapes and modal analysis. My work also contains a description of the measurement chain. From the contactless measurement of a vibrating surface using the application created in LabVIEW to its visualization in Pulse Reflex.
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Inductive Sensors
Šimberský, Michal ; Havránek, Zdeněk (referee) ; Bejček, Ludvík (advisor)
Bachelor thesis deals with inductive sensors. The thesis introduced the history of sensors, their advantages and disadvantages over other types of sensors. There are described different types of inductive sensors. Each type of sensor is described in terms of physical principles. In thesis there are listed examples of using different types of practice. Preparation was constructed to demonstration the characteristics and differences between eddy currents sensors and inductive oscillator sensors.
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Contactless measurement of temperature
Smrž, Martin ; Rozman, Jiří (referee) ; Balogh, Jaroslav (advisor)
Purpose of this bachelor thesis is get acquainted with problem of non-contact measuring of surface temperature of human body. The teoretical part of this labour deal about physical substance of non-contact temperature measurement, using types of detectors and application of this method to the medicine. In the practical part will focus on design and realization of electrical circuit for non-contact temperature measuring, comunication with personal computer and software solution of program for building surface temperature map of patient. At the end of labour was performed a set of measuring to compare accuracy of built thermometer with commercially available products.
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Inductive sensor
Koleček, Tomáš ; Bejček, Ludvík (referee) ; Beneš, Petr (advisor)
This bachelor thesis deals with indukčnostního-loaded impedance sensor, which is used for non-destructive materials testing. Describes a procedure for measuring the eddy current method using a straight coil. This thesis includes the final locus corresponding literature ferromagnetic and non-ferromagnetic for the measured material. The last part deals with the analysis of the appropriate choice of operating point derived from the sensor readings.
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Contactless temperature measurement
Závodný, Ondřej ; Bejček, Ludvík (referee) ; Beneš, Petr (advisor)
In this bachelor thesis I outlined the problems of non-contact measurement and practical verification of the basic parameters thermo camera Fluke Ti20. It is especially on the experimental measurement of the source of the reference temperature and the product to demonstrate the impact of emissivity. The aim of this work is a practical verification thermo cameras parameters, the determination of uncertainties and to explore the effects of parasitic repeated measurements. The basic part is a brief recorded history, the general relations and principles of the non-contact measurement, as well as their own use and typical parameters. In the next chapter you more acquainted with itself thermo camera, properties and basic parameters. The practical part is about the measurement itself. The main objective then was to verify the accuracy of reported thermo camera and examining the impact of emissivity.
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2D laser scanner
Tomek, Tomáš ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This thesis deals with design and implementation of extension module that enables 2D scanning with single-point interferometer. Afterwards is here solved question of software, which output data can be visualized in ModalVIEW by ABSignal company. My work also contains an overview of LDV sensors and scan systems, which are used to laser beam steering.
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Contactless level measurement
Pribula, Wojciech ; Richter, Miloslav (referee) ; Petyovský, Petr (advisor)
The~thesis begins with an~analysis of~methods of~water level measurement in~high-pressure system. This~systems are placed in~heating plants and power plants and they work with the water whose temperature exceeds 300\,°C and whose pressure is above 10\,MPa. Thesis present method of~differential pressure with the~derivation of~the~correction element and also is~described capacitive method, especially Hydrastep system. This~work prepares theoretical foundation under creating algorithm for level detection using image recognition. Also it considers suitable hardware as~camera and light for illuminating and highlighting the~level. It~includes outline of~captured image editing and detection algorithm. The next part of thesis is dedicated algorithm itself. There are described classes and methods that are used for level detection or for debugging. Also, there are specified necessary modifications of watermark and requirements for watermarks surroundings thats are necessary for proper functioning of the algorithm.
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