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Doppler's sensor beat freqeuncy proccessing
Dušek, Martin ; Macho, Miloslav (referee) ; Fuchs, Michal (advisor)
This work is engaged in ways of objects speed measuring mainly helped by Doppler Effect. The sensor HB410 is described in this work and its possible elaboration output heterodyne analog signal. The calculation of objects speed is deduced from frequency of heterodyne signal. In this work is projected circuit solution for elaboration of analog signal and its digitalization. Available types and nature of microcontrollers which are elaborating digital signal and communicating with PC are summarized in this work. In the last chapter is described microcontroller's driving software and PC software for speed measure.
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Receiver for remote control
Zdařil, Tomáš ; Kubíček, Michal (referee) ; Kolka, Zdeněk (advisor)
This bachelor’s thesis deals with design and construction facilities that will serve as the receiving module of infrared remote control.This modul will be controlled by the direction of rotation of antenna rotator.Part of this work is theoretical analysis of the issue.It also includes information on selection of appropriate components,primarily for the control microcontroller involvement and thein description of the overall wiring diagram.In the practical part contained information on the construction of this facility,including all documentation and set up the program for the microcontroller that is included on the enclosed CD.At the end of the dokument is a summary of the results of the work.
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Design of a SAR AD converter with switched capacitors
Sysel, Jan ; Kledrowetz, Vilém (referee) ; Prokop, Roman (advisor)
This work deals with the design of analog to digital converter with a successive approximation register for automotive industry with the range of operating temperatures from -40 °C to 175 °C and with the use of DAC with switched capacitors between interconnect metal tracks in an integrated circuit to minimize converter area. Theoretical part deals with the basic theory of analog to digital converters, principle of converter with a successive approximation register with the utilization of capacitive DAC. Then with the design of capacitors for the DAC in an integrated circuit made of metal layers and vias and their layout to minimize parasitic capacities. In the practical part is made the theoretical design of the converter on block level. Then is done the design of a capacitor for this DAC and layout of the whole DAC is made. On the transistor level are designed and verified blocks required for realization of this converter: circuit of voltage follower, operational amplifier, comparator and switches. Inside the converter the self-test circuit is implemented for measurement of its own nonlinearity. In the work the functionality of the converter is verified as a whole.
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Automatic monitoring of fluid density
Bebej, Rastislav ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
This thesis focuses on creating a device capable of monitoring the density of liquids during the fermentation process. The thesis includes the selection of a suitable principle for the measurement of the density of liquids, including the temperature compensation, the selection of suitable components and the design of schematics. Furthermore, the thesis deals with the design of a printed circuit board and wireless data transmission to a computer via Wi-Fi.
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Samples of examples for configurable gate array
Bajer, Jan ; Spáčil, Tomáš (referee) ; Bastl, Michal (advisor)
This thesis introduces the issue of configurable gate arrays and their position with respect to microprocessor technology. The aim is to present work with gate arrays on a set of basic realizations within the field of mechatronics. The examples are processed using VHDL and they are primarily intended for Altera / Intel devices.
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High performance data acquisition communication line
Hadámek, Jakub ; Petyovský, Petr (referee) ; Valach, Soběslav (advisor)
The aim of this thesis is the acquisition of data from the AD converter and it’s transfer via the JESD204B interface to FPGA with the following transformation and transfer to PC through 100G Ethernet or PCI Express interface. The first part of the thesis is focused on the introduction to used technologies and hardware and analysis of the solution of this project. Second part of the thesis describes solution and it’s functionality. I created HDL design which allows to transfer data from AD converter using both of the interfaces mentioned above. I also created software application for OS Linux which allows to receive and store incoming data in PC. In the end, the results of the measurement using the converter board are presented and discussed.
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Design and realization of the measuring amplifier of mechanical quantities
Kaplan, Tomáš ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
Subject of this effort is development and realization of one-channel data acquisition unit of mechanical quantities and it’s PC software application. Usage of this data acquisition unit is aimed on applications, where resistive strain gages wired as Wheatstone bridge with AC excitation are used. Output voltage of Wheatstone bridge is amplięed, demodulated with excitation voltage, filtered and level shifted for analog to digital conversion via AD converter. Converted digital data are sent via serial bus into microprocessor which sends them into PC for further meaningful representation in software application. Besides sensing bridge output voltage, data acquisition unit also generates AC excitation of Wheatstone bridge. This excitation voltage is generated via DA converter which communicates with microprocessor and converts incoming digital data into analog sine waveform. There is precise voltage reference circuitry for both of these converters. PC application’s task is to visualize measured data in meaningful form and to give tools for further work with measured data. It’s programmed in Python language and it has one independent thread which does reading and computing of incoming data and there is also class which builds graphical user interface and plots measured data into live graph.
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Temperature measurements with PT100 for aerospace applications
Závorka, Radek ; Dobesch, Aleš (referee) ; Kolka, Zdeněk (advisor)
This bachelor thesis deals with design of temperature measurement system, which is focused on aviation applications. The design emphasizes fulfilment of aviation standards, especially protection against voltage needle pulses and transient phenomena caused by lightning. Device must be resistant against electromagnetic interference. The core of equipment is AD converter with current source from Texas Instruments, which is suitable for connect different type of sensors. The whole system is controlled by microcontroller from ARM series. The measurement values are display on monitor of computer, which is connect by serial line.
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THD Analyzer
Ha, Tuan ; Drexler, Petr (referee) ; Mikulka, Jan (advisor)
This thesis deals with design of a THD analyzer for audio frequency. In the interduction, there is a description of methods of THD calculation and realization of THD analyzer. Suitable computing platform must be chosen with capability to process audio data. The expansion board is designed for audio acquisition. Part of this design is complete program that is capable of displaying spectrum and computing THD.
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Signal analyzer with FPGA
Kraus, Václav ; Bohrn, Marek (referee) ; Šteffan, Pavel (advisor)
The aim of this thesis is to study the possibilities of spectrum calculations, as well as data transfer via USB 3.0 and data saving to a DDR3 memory via FPGA. The focus is also on design and realization of a spectral analyzer with a record of samples to DDR memory expnaded by a narrowband converter using gate arrays. The work is divided into two sections, the first one dealing with the theoretical background. The second part denotes the realization of the design. The result of this work is a signal analyzer in a FPGA controlled from a computer application via the USB 3.0 interface.
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