|
|
Measurement of the magnetic properties of materials using LabVIEW
Šolc, Martin ; Bulín, Tomáš (referee) ; Huzlík, Rostislav (advisor)
In this thesis LabVIEW program and its development environment is described. After that the most used current transducers, their working principles and their properties are analyzed. Next part is dedicated to curves of magnetic hysteresis of ferromagnetic materials. Practical part of bachelor´s thesis is dedicated to measuring BH curves of torroidal core transformer. The measuring was made possible by LabVIEW program, using digital integration in LabVIEW, analog integration with RC cell, voltage converter and current transducer ITN 12-P Ultrastab. In the last part of the bachelor´s thesis I evaluate the measurements.
|
|
|
Test of remanency in a sport damper in dependence on a material of magnetic circuit
Polášek, Jan ; Kubík, Michal (referee) ; Roupec, Jakub (advisor)
This bachelor’s thesis deals with testing of maximal magnetic induction, remanence and B-H curve of different kinds of steels and application of this knowledge when choosing materials for magnetic circuit of magnetorheological (MR) dampers. The introduction of the thesis is intended to analyse knowledge of magnetorheological fluids and magnetic characteristics of different kinds of materials. Another part of bachelor’s thesis deals with the choice of steels of different chemical composition, heat treatment of steel, testing and comparing with FEM results. The aim of the thesis is also to design a clamping device for testing of magnetic circuit and to describe used measuring instruments and measurement methodology too.
|
|
|
Nature of magnetic anomalies on Moon, sample analysis
Kameníková, Tereza ; Kletetschka, Günther (advisor) ; Blecha, Vratislav (referee)
The magnetic properties of a rocks on Earth are mostly well known. But what is the magnetic properties of a rocks which originate extraterrestrial? Such as on Moon. We are interested in the intensity of paleofield of some Moon rocks which were chipped by Apollo 15 in early 70s. The text is an unification of the basic knowledge of a magnetism, the way how it originates. You can found here also the basics of paleomagnetism and methods how the rocks can get own magnetisation, their properties and some outline how the Moon rocks can get own magnetisation if moon doesn't have a dynamo. Then we summaries the information got from measurements of two Moon rocks 15404.219 and 15445.277, which were divided to subsamples and measured in Paleomagnetic laboratory in Czech Academy of Sciences. Each subsample was measured separately on 2G cryogenic magnetometer. We were interested in AF (alternating field) remanent magnetisation spectra from which we got an estimating intensity of paleofield from which the samples got own magnetisation. The final part is devoted to discussion on topic of possible existence of lunar dynamo or other possibilities how the Moon rocks can have held the magnetisation.
|
|
|
Nature of magnetic anomalies on Moon, sample analysis
Kameníková, Tereza ; Kletetschka, Günther (advisor) ; Blecha, Vratislav (referee)
The magnetic properties of a rocks on Earth are mostly well known. But what is the magnetic properties of a rocks which originate extraterrestrial? Such as on Moon. We are interested in the intensity of paleofield of some Moon rocks which were chipped by Apollo 15 in early 70s. The text is an unification of the basic knowledge of a magnetism, the way how it originates. You can found here also the basics of paleomagnetism and methods how the rocks can get own magnetisation, their properties and some outline how the Moon rocks can get own magnetisation if moon doesn't have a dynamo. Then we summaries the information got from measurements of two Moon rocks 15404.219 and 15445.277, which were divided to subsamples and measured in Paleomagnetic laboratory in Czech Academy of Sciences. Each subsample was measured separately on 2G cryogenic magnetometer. We were interested in AF (alternating field) remanent magnetisation spectra from which we got an estimating intensity of paleofield from which the samples got own magnetisation. The final part is devoted to discussion on topic of possible existence of lunar dynamo or other possibilities how the Moon rocks can have held the magnetisation.
|
|
|
Measurement of the magnetic properties of materials using LabVIEW
Šolc, Martin ; Bulín, Tomáš (referee) ; Huzlík, Rostislav (advisor)
In this thesis LabVIEW program and its development environment is described. After that the most used current transducers, their working principles and their properties are analyzed. Next part is dedicated to curves of magnetic hysteresis of ferromagnetic materials. Practical part of bachelor´s thesis is dedicated to measuring BH curves of torroidal core transformer. The measuring was made possible by LabVIEW program, using digital integration in LabVIEW, analog integration with RC cell, voltage converter and current transducer ITN 12-P Ultrastab. In the last part of the bachelor´s thesis I evaluate the measurements.
|
|
|
Test of remanency in a sport damper in dependence on a material of magnetic circuit
Polášek, Jan ; Kubík, Michal (referee) ; Roupec, Jakub (advisor)
This bachelor’s thesis deals with testing of maximal magnetic induction, remanence and B-H curve of different kinds of steels and application of this knowledge when choosing materials for magnetic circuit of magnetorheological (MR) dampers. The introduction of the thesis is intended to analyse knowledge of magnetorheological fluids and magnetic characteristics of different kinds of materials. Another part of bachelor’s thesis deals with the choice of steels of different chemical composition, heat treatment of steel, testing and comparing with FEM results. The aim of the thesis is also to design a clamping device for testing of magnetic circuit and to describe used measuring instruments and measurement methodology too.
|
guest ::
