|
|
Design of measurement unit for analysis of surface materials properties
Kratochvíl, Robert ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
The thesis deals with the application of laser beams for examination of material properties. The properties being examined are quality of surface finish and transmissivity of materials in the optical portion of the electromagnetic spectrum. A measuring device containing laser diodes as a source of laser beam and photodiodes for evaluation of examined phenomena serves for examination of both properties. Conversion of the signal to digital quantity and its further processing take place in a microcontroller. The data is then sent via a serial bus and a converter to a computer, where it may be saved in a user program and where the user can work with them later. The thesis contains results of reflectivity measurement of a set of metal samples with different surface finish. Transmissivity measurement was applied on a set of optical filters.
|
|
|
Strain measurement system
Novotný, Jan ; Fedra, Zbyněk (referee) ; Štohanzl, Milan (advisor)
The batchelor thesis is focused on the design of strain measurement system using a metal resistance strain gages. Measured analog quantity is converted to digital form and sent to microcontroller, where the quantity is adapted and then display. The first part of project looks into genesis of different types of mechanical stresses, principles of resistance strain gages, the types of measurement bridges, theory of analog-to-digital conversion and short description of used microcontroller and liquid-crystal display. There are wiring diagram of the system and printed circuit boards designed in the second part of project. System can be also calibrated and driven by PC using Universal Asynchronous Communication Interface. System is physical realized, its functions are checked and there is subscribed driving of the system. Finally other alternatives of improving properties of the system are analyzed due to posibility of using of the system in practical aplications.
|
|
|
Strain measurement system
Novotný, Jan ; Fedra, Zbyněk (referee) ; Štohanzl, Milan (advisor)
The batchelor thesis is focused on the design of strain measurement system using a metal resistance strain gages. Measured analog quantity is converted to digital form and sent to microcontroller, where the quantity is adapted and then display. The first part of project looks into genesis of different types of mechanical stresses, principles of resistance strain gages, the types of measurement bridges, theory of analog-to-digital conversion and short description of used microcontroller and liquid-crystal display. There are wiring diagram of the system and printed circuit boards designed in the second part of project. System can be also calibrated and driven by PC using Universal Asynchronous Communication Interface. System is physical realized, its functions are checked and there is subscribed driving of the system. Finally other alternatives of improving properties of the system are analyzed due to posibility of using of the system in practical aplications.
|
|
|
Design of measurement unit for analysis of surface materials properties
Kratochvíl, Robert ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
The thesis deals with the application of laser beams for examination of material properties. The properties being examined are quality of surface finish and transmissivity of materials in the optical portion of the electromagnetic spectrum. A measuring device containing laser diodes as a source of laser beam and photodiodes for evaluation of examined phenomena serves for examination of both properties. Conversion of the signal to digital quantity and its further processing take place in a microcontroller. The data is then sent via a serial bus and a converter to a computer, where it may be saved in a user program and where the user can work with them later. The thesis contains results of reflectivity measurement of a set of metal samples with different surface finish. Transmissivity measurement was applied on a set of optical filters.
|
guest ::
