|
|
Digital Signal Processor for Handheld RFID Reader
Benetka, Miroslav ; Zamazal, Michal (referee) ; Šebesta, Jiří (advisor)
This diploma thesis deals with design and realization of a module for a digital signal procesor, for handheld RFID reader working in UHF band. It utilises a special chip EM4298 for RFID signals processing. Module is controlled by the microcontroller ATmega32L, which communicates with the PC through USB bus. Settings in EM4298 is made by a service program which processes received identifying data obtained from tags. Source codes for microcontroller are created in AVR Studio 4.13 program. Source codes for microcontroller are created in C++ Builder 6.0 program. Further thing is Desing and realization of analog interface and a UHF transceiver for wireless communication with tags. A Webench program was used for the analog interface design, which is freely available on the internet. For verification of parameters of the analog interface it was used PSpice 10.0 program. The UHF transceiver is build-up with a MAX2903 chip (transmitter) and AD8347 (receiver) and transmitting and receiving antennae.
|
|
|
Laboratory module for educational purposes
Tuhý, Luboš ; Vašíček, Adam (referee) ; Procházka, Petr (advisor)
This thesis describes the design and implementation of the transistor inverter to the subject of power electronics first outcome of this thesis will transistorized inverter that will serve as a demonstration tool in laboratory practice course electrical power. The laboratory preparation, students will be able to virtually test your theory acquired knowledge of the issue. Part of the theoretical analysis will be proposed circuit simulation program through classes Spice.
|
|
|
BJT and MOSFET transistor-based switches - educational laboratory equipment
Bartoň, Ondřej ; Langhammer, Lukáš (referee) ; Šotner, Roman (advisor)
This thesis deals with the design of new experimental laboratory equipment with bipolar and unipolar transistor switches. This work analyzes the components needed for circuit design, such as integrators, comparators, bipolar, and unipolar transistors. Designed system is going to include a functional rectangular signal generator that controls unipolar and bipolar transistor switches. These switches will be designed for current switching up to 1 A. The aim of the thesis is to verify the functionality of designed circuits using the simulation software PSpice.
|
|
|
Laboratory source based on switching technology
Kočí, Martin ; Kubíček, Michal (referee) ; Brančík, Lubomír (advisor)
The aim of this thesis is a description of the dierent topologies used in switching power supply and subsequent use of acquired knowledge to select an appropriate topology, power supply, using the selected topology and the subsequent construction of laboratory source as a whole. Ideological content of the proposal are part of the power source based on the topology being used in switching power supplies, also on the controller working as buck converter controlled by PWM and the control section, whose mainfeature is the 8-bit microprocessor. The design is shown working with the designprogram PXLS Expert and the program for PCB Design EAGLE. Simulation shown in this thesis are implemented in the program OrCAD PSPice. Objective is to ervive all the functional blocks as a whole and the subsequent measurement of basic parameters, which are pro- cessed graphically. All parameters are measured at the end compared with the expected parameters and the simulations generated in the ideological content. Finally, the work is to evaluate all of the results obtained and compared with the primary objective of this work.
|
|
| |
|
| |
|
|
Time Assessment of Lifting Mechanisms Efficiency in Civil Engineering
Štěrba, Martin ; Sedlák,, Petr (referee) ; Gašparik,, Jozef (referee) ; Motyčka, Vít (advisor)
The dissertation thesis deals with the time assessment of designed lifting mechanisms in monolithic constructions in Civil Engineering. The main reason for choosing this subject matter is a current trend in construction that in terms of administrative and housing construction tends to build monolithic buildings. Lifting mechanisms are crucial in such buildings nowadays. The efficiency of lifting mechanisms is often neglected in the preparatory phase of construction time schedules, which leads to inefficient capacity utilization of the machine. Nevertheless, this is directly related to meeting the agreed deadlines, which in turn leads to complications that often result in a considerable financial loss for the contractor. In order to solve this subject matter it was necessary to perform monitoring on an appropriate sample of constructions. In the case of this work it was a total of six buildings, four of which were further analysed. Furthermore, individual partial construction processes requiring tower crane operation were analysed. A time assessment methodology including a proposal of possible prioritization of selected activities has been developed. Based on the knowledge gained from the monitoring of the buildings as well as from the analysis of individual items, a simulation model was developed. This model mathematically and graphically evaluates the ability of the designed tower crane to serve a given number of partial construction processes within a specified evaluation section in which the smallest evaluated section equals to one work shift. The benefit of this work is to enable efficient deployment of the tower crane in the preparatory phase of construction. Another benefit is also a prompt operative assessment of the load of the tower crane by a works foreman within a given shift. This should lead to a more efficient deployment of tower cranes during construction and as a consequence it should result in keeping the agreed terms. This is closely associated
|
|
|
Time Assessment of Lifting Mechanisms Efficiency in Civil Engineering
Štěrba, Martin ; Sedlák,, Petr (referee) ; Gašparik,, Jozef (referee) ; Motyčka, Vít (advisor)
The dissertation thesis deals with the time assessment of designed lifting mechanisms in monolithic constructions in Civil Engineering. The main reason for choosing this subject matter is a current trend in construction that in terms of administrative and housing construction tends to build monolithic buildings. Lifting mechanisms are crucial in such buildings nowadays. The efficiency of lifting mechanisms is often neglected in the preparatory phase of construction time schedules, which leads to inefficient capacity utilization of the machine. Nevertheless, this is directly related to meeting the agreed deadlines, which in turn leads to complications that often result in a considerable financial loss for the contractor. In order to solve this subject matter it was necessary to perform monitoring on an appropriate sample of constructions. In the case of this work it was a total of six buildings, four of which were further analysed. Furthermore, individual partial construction processes requiring tower crane operation were analysed. A time assessment methodology including a proposal of possible prioritization of selected activities has been developed. Based on the knowledge gained from the monitoring of the buildings as well as from the analysis of individual items, a simulation model was developed. This model mathematically and graphically evaluates the ability of the designed tower crane to serve a given number of partial construction processes within a specified evaluation section in which the smallest evaluated section equals to one work shift. The benefit of this work is to enable efficient deployment of the tower crane in the preparatory phase of construction. Another benefit is also a prompt operative assessment of the load of the tower crane by a works foreman within a given shift. This should lead to a more efficient deployment of tower cranes during construction and as a consequence it should result in keeping the agreed terms. This is closely associated
|
|
|
BJT and MOSFET transistor-based switches - educational laboratory equipment
Bartoň, Ondřej ; Langhammer, Lukáš (referee) ; Šotner, Roman (advisor)
This thesis deals with the design of new experimental laboratory equipment with bipolar and unipolar transistor switches. This work analyzes the components needed for circuit design, such as integrators, comparators, bipolar, and unipolar transistors. Designed system is going to include a functional rectangular signal generator that controls unipolar and bipolar transistor switches. These switches will be designed for current switching up to 1 A. The aim of the thesis is to verify the functionality of designed circuits using the simulation software PSpice.
|
|
| |
guest ::
