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Measurements by sampling computer card - laboratory task
Tomaštík, Roman ; Havránek, Zdeněk (referee) ; Dřínovský, Jiří (advisor)
This thesis focuses on the measurement with the help of sampling cards and determination of the basic parameters of the measured signal. There will be described basic characteristics of the used card Alazartech ATS860- 256M and brief description of the programming languages which will control the cards. In these environments there were the created driving programs for the operation of these cards. Main measuring program was created in the language C\C++, that shall work as oscilloscope and the same time as spectral analyzer. This programme will determine basic characteristics of the measured signal. Further there will be created simple preparation for memasuring with this card. In the conclusion of this thesis will create instrutions for laboratory exercise.
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Broadband Lownoise Amplifier
Varga, Kamil ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
The bachelor thesis describes the problems of broadband low-noise preamplifiers and the conditions of their design, including their printed circuit board. Furthermore, the thesis considers debugging and measuring of the most important parameters of these amplifiers. All of these problems are explained on two practical solutions.
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Vision sensor
Rášo, Peter ; Havránek, Zdeněk (referee) ; Bejček, Ludvík (advisor)
This bachelor thesis describes the vision sensors and their industrial applications. It is divided in to the 4 main parts: hardware problematic, software problematic, applications, comparison and the market survey of the vision sensors. The special part of this work is a description of working station for demonstration basic characteristics and application possibilities of vision sensor VeriSens 1200 which will be used in laboratory education. Solution of non-typical applications is described in lighting techniques. Program documentation of vision sensor VeriSens 1200 from Baumer helps with design and particular steps of this application.
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Measurement module with simultaneous-sampling A/D converter
Křížek, Miroslav ; Beneš, Petr (referee) ; Havránek, Zdeněk (advisor)
In this work is designed programme unit for acquisition analog acoustic signlas from sensors. There is used accurate A/D converter ADS1287 by the company Texas Iinstrument with resolution of 24 bits to digitizing these signals. There is used 32-bit microprocessor AT91SAM7S64 by the company Atmel to control this A/D converter and sending digitized data to PC. This microprocessor has implemented USB interface. By force of developmental programme units whit microprocessor and A/D converter is produced programme for microprocessor in developmental setting IAR Embedded Workbench IDE 5.0 and simple aplication for PC in setting Borland C++ Builder. Both of those programs are in language C++. Rate of sampling is 26 kHz. On the basis is realized programme unit USB-ADC whit microprocessor and A/D converter.
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Metal components testing equipment
Krupa, Zdeněk ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This thesis deals with designing a portable indicator for measuring of content of ferromagnetic phase in non-ferromagnetic steels. The first part of the thesis describes the principle of sensor used in the indicator. A market survey is presented, with a description of selected indicators that are suitable for measurement of content of ferromagnetic phases. The following part deals with a design of the device hardware, which is focused on finding a suitable indicator concept. Circuits for battery charge, measuring chain and other circuits are designed in this part. The following part of the thesis describes the function of the software. First it describes the software for DSP, then the software for personal computer. The software for DSP has been programmed in the C language, the software for the personal computer in the C# language. The last part but one describes an inspectional measurement of the indicator. This measurement has been performed on testing samples as well as other materials. The final part presents a summary of the outcomes and provides recommendations for possible improvement.
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System for measuring properties of electronic transformers
Němec, Ondřej ; Havránek, Zdeněk (referee) ; Klusáček, Stanislav (advisor)
The purpose of this thesis was to study the properties of electronic current and voltage transformers, choose the method for temperature cycle accuracy test and the development of the measuring software. Measuring software was realized in LabVIEW version 8.2. The first part describe the topic of this thesis. The second part describes various kinds of sensors and describtion of functions and specifications. The third part describe programming system LabVIEW. The fourth describe design of connection supply and measurement part of circuit. The fifth part describes used instruments. The sixth part is about used methods measuring. In the seven part is the description of the functions of this program and its control. In eight part is evaluated measurement uncertainty. In the last part are shown examples of the application program.
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Strain Gage amplifier
Kneblík, Adam ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
The thesis deals about method of gain signals from strain gauge bridges. There are mentioned some signal conditioning methods for bridges amplifiers and charactered their properties. In the next part of this thesis are calculated the amplifier errors for various temperature. There are projected individual variants of strain gage amplifiers (instrumentation amplifier AD524, isolation amplifier, switched capacitor based instrumentation amplifier), their properties are compared with strain gage amplifier Vishay P-3500.
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Weather measurement
Chovanec, Jan ; Havránek, Zdeněk (referee) ; Bejček, Ludvík (advisor)
The achievement of this thesis is to design functional equipment which is able to measure the basic meteorological variables as air temperature, humidity and barometric pressure. In order to measure relative humidity completed with temperature, an intelligent sensor manufactured by Intersema Inc., MS5534B, was chosen. Relative humidity is measured by a capacitance sensor Humirel HS1101LF. The measured data are stored in anon-volatile memory. Data can be downloaded to a computer file via serial port or they can be online displayed on the computer screen via the wireless Bluetooth connection. Because the equipment is supposed to be used for the external measurement without the connection to electricity, low power consumption was considered as a most important parameter as well as good weather protection.
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Optosensors
Jakoubek, Martin ; Havránek, Zdeněk (referee) ; Bejček, Ludvík (advisor)
Master’s Thesis solves a problem of vehicle detection for a system control of stoplights on crossroads for a long distance. First, there is a resolution how it is possible to detect cars and select from two sensor’s principles; second, chosen specific microwave detector is a result of sensor market research and finally, there is a description and processing of sensor.
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Inclinometers and Gyroscopes
Hývnarová, Irena ; Beneš, Petr (referee) ; Havránek, Zdeněk (advisor)
This study deals with tilt sensors. Besides others methods, accelerometers and gyroscopes are also convenient to solve this problem. Tilt sensors which are described in this thesis are working with capacitive, piezoresistive and thermal method. Capacitive accelerometers from producer Analog Devices, STmicro and Freescale, piezoresistive accelerometers from producer Panasonic Matsushita and gyroscope ADXRS300 are tested by practical measurement. Parameters of these accelerometers are found and they are compared with parameters from producer. Measurement reliability in this study is analysed as well. This thesis is divided in chapters theoretically describing principles of particular accelerometers and the chapters containing measured data evaluation.
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