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Electronic Compass
Špaňhel, Petr ; Slaný, Karel (referee) ; Šimek, Václav (advisor)
This bachelor's thesis deals with a design and construction of equipment that should offer an easy approach to measurement of temperature, air pressure and angular orientation to the Earth surface. Subsequently, this set of infromation will be shown in a concise way on a graphic LCD display. The introductory chapter provides a general outline to the hardware conception, which primarily involves reading of data from sensors and their graphical visualization. Details on control firmware aspects are included in the following two chpaters. Fourth chapter is aimed at device operation and its user interface. Finally, evaluation of the results and conclusion is provided.
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Firmware for a pressure sensor with HART interfacel
Čožík, Ondřej ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
The bachelor thesis deals with draft of firmware for a capacitive sensor with HART communication protocol. At first, it briefly describes the HART protocol (principles of communication, frame structure and connectivity devices on the HART bus). Subsequently attention is paid to capacitive sensor description, method of data processing and communication method of the sensor with HART interface. The final part depicts individual parts of the firmware for the capacitive sensor (such as the method of values reading from A/D converter, data reading/writing from/to external or internal EEPROM or calculation of the measured pressure value, its temperature compensation and corresponding current loop, using D/A converter.
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Calibration of pressure gauges
Schwarz, Jakub ; Zuth, Daniel (referee) ; Vdoleček, František (advisor)
This diploma thesis is dealing with pressure measurement. It describes instruments dedicated to purpose - pressure gauges. Basic of correct pressure measurement is knowledge of behaviour of used pressure gauge. This knowledge is acquired by calibration. With calibration is associated also analysis of errors and uncertainty of measurement and creation of calibration list. Calibration takes place on model workspace pressure measuring in laboratory.
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Measurement system for laboratory of experimental biology
Zálešák, Marek ; Klusáček, Stanislav (referee) ; Čejka, Miloslav (advisor)
There is a breif description of the Lab VIEW from National Instruments in the following text. It also describes the connection measuring cards through different types of buses on the PC. There is also information about the aquatic condition of plants as well as arrangements which will be implemented on the equipment generated during this work. In other parts of the text there is analysed the implementation of measurement and control pressure in the plant and flow measurement weighing using the LabVIEW 8.2
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IO/Link interface implementation to pressure sensors
Pešl, Jiří ; Novotný, Radovan (referee) ; Kadlec, Jaroslav (advisor)
This thesis is concerned with the measurement of physical quantities. Thesis describes sensors in general terms and requirements, which delivers latest trends in the field of automation. The main theme of this thesis is sensors for meassuring pressure, and their connection to the automation chain. In the next part thesis describes the design of the converter for connecting SMART sensors for pressure measuring, that use HART communication protocol, to the automation systems managed by a communication protocol IO-link. First will be described in detail various communication standards by their ISO OSI model, and on this theoretical basis will be based design of converter between communication protocol HART and communication protocol IO-Link. The last part will be Designed software for this converter.
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Autonomous USB datalogger
Románek, Karel ; Sutorý, Tomáš (referee) ; Kolka, Zdeněk (advisor)
This thesis treats concept of autonomous temperature, relative humidity and pressure USB datalogger. Also there is explained datalogger function, hardware design with respect on device consumption and design of chassis. Furthermore, there is described communication protocol for control and reading out data by the PC. Furthermore, there are described firmware drivers for some used components and modules for USB communication, RTC and data compression. Lastly there is described software which is used for datalogger configuration and data read out.
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Meteo weather station
Dvořák, Jiří ; Fajmon, Petr (referee) ; Fedra, Zbyněk (advisor)
The aim of this master‘s thesis is design and construction of home meteo weather station, the choice of applicable temperature, humidity and pressure sensors and characterization of workable device of station. The core of the station is microcontroller ATmega8 used for process data from sensors. Evaluative criteria for choice of sensors will be comunicate interface, accuracy, operating range, current drain and other aspects. Outer transmittin unit measure air temperature and relative humidity. These data are trasmitted by wireless radio module to interior receiving unit, that measure interior temperature and atmospherical pressure and represent measured data to LCD display including dew point. The data are transmitting to the internet and storing in the database. Measured values are available on the web page where you can display the graphs of last measured values.
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Workplace of flow and pressure measurement
Brabenec, Jiří ; Beneš, Petr (referee) ; Bejček, Ludvík (advisor)
The thesis deals with formation of a workplace for preparation gaseous mixtures and their future usage. The main goal of the thesis is testing of new materials which have suitable usage as catalysts. Gaseous mixture is prepared by calorimetric mass flow meters with control valve and multiposition microelectric valve actuators. The next part describes measuring of pressure and temperature and controlling of furnace temperature. The thesis deals with specifications of all devices, their circuitry, communication and program controlling. All devices are controlled by computer with program which is programmed in LabVIEW.
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Hydrostatic, deformation and piston pressure gauges
Gregor, Kamil ; Turygin, Andrei (referee) ; Hammer, Miloš (advisor)
This bachelor thesis deals with barometers, especially the principle of their function. The topic of this thesis is hydrostatic barometers, which work on the principle of hydrostatic power; deformation barometers, which measure pressure on the basis of elastic deformation; and finally force barometers, which measure force derived from the pressure applied on a specific area inside the barometer. The first part of the thesis focuses on diagnostics using barometers. An example of practical application of diagnostics is presented, too. In the second part of the thesis there is a practical example of using barometers in diagnostics.
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Testing method of car air-conditions
Bezděk, Lukáš ; Katolický, Jaroslav (referee) ; Štětina, Josef (advisor)
A topic of bachelor’s thesis is a testing of car air-conditions. The introduction shortly covers the history of the air-condition in the personal vehicle. Following chapters describe a definition of air-conditioning equipment, explaining the cooling principle, and transporting the air to the interior of the vehicle. Air-conditioning device is a complicated unit, thus there are mentioned the main circuits and components, from which the vehicle air-condition is built. The basic division is also included. There is also a big chapter that paid attention to different diagnostic methods of testing the vehicle air-conditions. This chapter follows a proposal of testing device and functional scheme of air-condition measurement. The conclusion summarizes the usage of the cooling media, its impact on environment, and new trends in area of refrigerant.
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