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Evaluation of pressure conditions in the quenching chamber of low-voltage device
Nevrzal, Filip ; Vávra, Daniel (referee) ; Valenta, Jiří (advisor)
In this master’s thesis there is firstly conducted research about pressure measurement. Next there is mathematical description of thermodynamic conditions in used testing chamber by using magnetohydrodynamic and Maxwell equations. Next chapter deals with testing chamber itself, more precisely with function, model and changes done to it. In practical part there are data measured by used sensors, which are also closer described in this chapter. In next chapter there is comparison of reaction times of used sensors and their frequency specters, obtaining using fast Fourier transformation. Second to last chapter introduces very measurement on the real device and in the last chapter these data are analyzed and more closely described.
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Design and digital commissioning of the bag handling gripper
Vávra, Daniel ; Pavlík, Jan (referee) ; Vetiška, Jan (advisor)
This bachelor‘s thesis deals with a conceptual design of a handling gripper for 25-kilo bags and its subsequent digital commissioning. The theoretical part explains the issue with end effectors for handling, including introduction of specific concepts of bag handling grippers by chosen companies. There is also a problematic of virtual commissioning mentioned in the end of the theoretical part. The practical part deals with the conceptual design of the gripper itself, which is then substantiated by needed strength and kinematic analysis in a calculation report. The main advantage of designed solution is, apart from high moving speed, pallet gripping mechanism, due to which the gripper is able to prepare pallets for subsequent bag palletization automatically. In the end, the chosen conceptual solution is digitally commissioned in ABB Robot Studio program, along with creating a simulation of gripper moves.
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Conceptual Design of the Complete Hydraulic Tipping System
Vávra, Daniel ; Tobiáš, Martin (referee) ; Fojtášek, Jan (advisor)
The main topic of this work is to clarify the basic types of tipping bodies of heavy trucks and a simplified design of the tipping hydraulics. The first part mentions the most common types of tipping bodies and hydraulic systems. Furthermore, the principles and parameters of the used hydraulic components are clarified. Within the design of the hydraulics of the tipping body of a one-sided tipper, the basic relations for the derivation of the kinematics of movement, the design of the hydraulic cylinder and all other components are described. At the end of the work is described the analysis of temperatures during the process of tilting the body and instructions for operation and maintenance.
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Vývoj land use vojenského újezdu Boletice
VÁVRA, Daniel
The main goal of the diploma thesis is to map the development of land use in the Boletice military area. The first part of the thesis presents a literary review which was elaborated from available literature and it deals with the definition of the landscape, protection of landscape biodiversity in the Czech legal system, military areas in our country and their scientific value and biodiversity. The following chapter contains a description of the territory and methods of work. The last part targets at the historical development of the area and several selected extinct villages. Furthermore, it presents evaluation of changes in land use in defined periods as well as the future development of the military area.
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Design and digital commissioning of the bag handling gripper
Vávra, Daniel ; Pavlík, Jan (referee) ; Vetiška, Jan (advisor)
This bachelor‘s thesis deals with a conceptual design of a handling gripper for 25-kilo bags and its subsequent digital commissioning. The theoretical part explains the issue with end effectors for handling, including introduction of specific concepts of bag handling grippers by chosen companies. There is also a problematic of virtual commissioning mentioned in the end of the theoretical part. The practical part deals with the conceptual design of the gripper itself, which is then substantiated by needed strength and kinematic analysis in a calculation report. The main advantage of designed solution is, apart from high moving speed, pallet gripping mechanism, due to which the gripper is able to prepare pallets for subsequent bag palletization automatically. In the end, the chosen conceptual solution is digitally commissioned in ABB Robot Studio program, along with creating a simulation of gripper moves.
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Conceptual Design of the Complete Hydraulic Tipping System
Vávra, Daniel ; Tobiáš, Martin (referee) ; Fojtášek, Jan (advisor)
The main topic of this work is to clarify the basic types of tipping bodies of heavy trucks and a simplified design of the tipping hydraulics. The first part mentions the most common types of tipping bodies and hydraulic systems. Furthermore, the principles and parameters of the used hydraulic components are clarified. Within the design of the hydraulics of the tipping body of a one-sided tipper, the basic relations for the derivation of the kinematics of movement, the design of the hydraulic cylinder and all other components are described. At the end of the work is described the analysis of temperatures during the process of tilting the body and instructions for operation and maintenance.
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Evaluation of pressure conditions in the quenching chamber of low-voltage device
Nevrzal, Filip ; Vávra, Daniel (referee) ; Valenta, Jiří (advisor)
In this master’s thesis there is firstly conducted research about pressure measurement. Next there is mathematical description of thermodynamic conditions in used testing chamber by using magnetohydrodynamic and Maxwell equations. Next chapter deals with testing chamber itself, more precisely with function, model and changes done to it. In practical part there are data measured by used sensors, which are also closer described in this chapter. In next chapter there is comparison of reaction times of used sensors and their frequency specters, obtaining using fast Fourier transformation. Second to last chapter introduces very measurement on the real device and in the last chapter these data are analyzed and more closely described.
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Mapování památných stromů ve vybraném území a návrh na vyhlášení nového památného stromu
VÁVRA, Daniel
The main goal of the bachelor thesis is to map memorable trees in Strakonice district and to introduce a proposal to announce a new memorable tree. The first part of the thesis presents a literary review which was elaborated from available literature and it deals with the protection of memorable trees, their registration and tree care. The following chapters contain the description of a territory according to climatological, geological, pedological characteristics and the detailed methodology. The last part introduces the complete list of memorable trees in this territory and presents detailed information about individual woody plants - for example their history, localization and health condition. The thesis also presents photographs of selected specimen. The memorable trees were remeasured and later compared with already measured figures recorded in the register of nature conservation.
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Offset of load to sole of feet of special Police units members
Vávra, Daniel ; Majorová, Simona (referee) ; Hošková, Blanka (advisor)
3 ABSTRAKT: Title: Offset of load to sole of feet of special Police units members Objective: Objective of the thesis is to analyse causes and link between health problems and overload of the whole organism, lower extremities in particular. The issue has been narrowed down to special Police units, whose specific job increases strain to the whole organism as a result of using ballistic protective components. Methodology: In cooperation with the Ortopedica company which specialises in production of surgical insoles, a method called podography is used for diagnostics of sole of the foot. It is a simple, not expensive and accessible method enabling to acquire two-dimensional image of surface of the foot sole. The Ortopedica company provided all necessary equipment, and has carried out expert evaluation of samples of Mayer's method. For acquire of statements is used questionnaire survey. It is the method which explore and describe a behaviour and an opinion of specific group of people. For collation of two groups of plantograms is used a method called comparison. The first group shows a condition of sole of foot after initial measurement. The second group shows a condition of sole of foot after the compensatory training. Results: Results of the research are process as a case study. Results show impact of overload...
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