|
|
Measurement of Level by Fiber Optic Sensors
Bednář, Tomáš ; Havránek, Zdeněk (referee) ; Šedivá, Soňa (advisor)
The subject of this master‘s thesis is the issue of design of fiber optic sensor for min/max and continuous measurement of liquid level, which could be used for laboratory measurement of optoelectronics. The thesis is divided into the three parts, the first part deals with methods of retrieval level measurement using fiber optic sensors. The second part is made of plant design of optical fiber sensors, it is shown the implementation of measuring devices for liquid level measurement and measured transfer characteristics of the sensors developed. The last part is proposed for laboratory typing tasks using established preparation for teaching in the subject Optoelectronic sensors.
|
|
|
Measuring system for temperature test of sensors
Turanský, Luboš ; Čejka, Miloslav (referee) ; Havránek, Zdeněk (advisor)
In this work is described design of measuring and evaluation system for temperature rise tests in cooperation with ABB company. As temperature sensors are used thermocouples type L and measuring hardware consists of chassis cRIO 9073 and measuring card NI 9213. In LabVIEW 2011 is created software for cRIO and as well for control PC and structure of both programs is described in detail. Thesis includes also practical estimation of metrological parameters of created system.
|
|
|
Nontraditional methods for correction of leading wires resistance
Drahokoupil, Petr ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This bachelor`s thesis deals with the question of elimination leading wires resistances. This negative effect is major issue in temperature measurement when using resistive sensor. Work analyse basic methods and their principle of compensation negative effect . Then it covers nontraditional methods and their principle. There is a scheme of current look described in detail in this work, which is being used to eliminate leading wires resistances. Part of the work is a simulation of this look and comparison with measurement.
|
|
|
Automation of track for measurement of water valves characteristics
Lekeš, Pavel ; Havránek, Zdeněk (referee) ; Šedivá, Soňa (advisor)
My diploma thesis describes upgrade of flowbench serving as test rig for regulation valves characteristic measurement. At the beggining, there is an introduction to the water regulation valves theory followed by current machine condition description. Next chapter defines needed improvements and at the end follows proposition of improvements and necessary component definition and final realization. Final chapter summarizes complete project.
|
|
|
Evaluation of standard uncertainty of Climatic Chamber
Dojava, Václav ; Havránek, Zdeněk (referee) ; Šedivá, Soňa (advisor)
The thesis deals with the problematics of confirmation of the climatic chamber CTS 65/50, which is a component of CVVOZE testing laboratory. Theoretical part deals with the analysis and description of methods of confirmation of climatic chambers based primarily on technical standards. This part then contains a brief description of a theory of measurement uncertainty. Practical part deals with the design of measurement procedure, which was used for confirmation measurement of ten temperature setpoints. This section then also contains an analysis of the measured data with the evaluation of standard combined uncertainty of temperature measurement. The last part contains an evaluation of the confirmation results, which were the basis for the determination of whether the climatic chamber meets the requirements for the steady-state temperature stability inside the workspace resulting from the standards for the climatic testing
|
|
|
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.
|
|
|
Simultaneous bidirectional transfer of data and power supply over one fiber
Baura, Tomáš ; Šedivá, Soňa (referee) ; Havránek, Zdeněk (advisor)
This Bachelor’s Thesis deals with projecting and implementation of transmission systems using a single optical fibre for parallel bidirectional transmission of optical power and data signal. These systems include Polarization Division Multiplexing (PMD), Wave Division Multiplexing (WDM) and Time Division Multiplexing (TDM). The theoretical part of the thesis closely describes and specifies optical fibre, optical radiation sources and detectors as well as passive optical components suitable for transmission system implementation. Further, the thesis describes principles of individual transmission systems including a selection of particular optical and optoelectronic parts for the TDM and WDM transmission composition. Each chapter of the practical part of this document describes methods and processes used for individual measurements. First the individual parameters of individual optoelectronic and optical components of transmission systems are verified and characterized. This is followed by measuring the parameters of the composed TDM and WDM transmission systems such as optical loss, transmitted electric power efficiency, transfer speed etc. Finally, the possibility of outer optical signal detection on an integrated photodiode PIN of the laser diode is tested and verified, which could be used for both transmission and reception of data signal.
|
|
|
Current sensor with digitized output signal
Poruban, Milan ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
The main aim of this thesis is to describe principles of measuring of alternating current in low voltage power supply networks with Rogowski coil and study in detail the requirements for electronic current transformer with digital output. Farther confirm the basic parameters of Rogowski coil as an current sensor and creating its alternate electric model. Theoretical part deals issue of measuring alternating current with Rogowski coil, its properties, characteristics, construction and advantages over conventional current transformers of alternating current. There are also listed requirements for alternating current transformers and requirements for their digital output. A/D converters are also discussed. Practical part deals with measuring of parameters of Rogowski coil and creating its alternate electric model. Furthermore, the design and implementation of the input circuit for a pair of A/D converters, which represents a measurement card from NI. Data from the measuring card is processed by the program LabVIEW. The outcome of this thesis is a functional circuit that provides an analog signal pre-processing of Rogowski coils represented by installed PCB designed for 18-bit AD7690 converter and technology demonstrator, which processes the digitized signal from the measuring card.
|
|
|
Motion activated measurement module with wireless interface
Novotný, Josef ; Krajsa, Ondřej (referee) ; Havránek, Zdeněk (advisor)
This semestral project deals with the selection of a suitable MEMS mechanical motion sensor with verylow power consumption. The market research is mainly about sensors that can be activated by motion. Project also contains description of motion activation function of the sensor ADXL362. Project also contains verification of datasheet data of the sensor ADXL362 for the motion activation. Further It also includes a market survey of microcontrollers with ARM Cotex M4 core. Furthermore, the wireless transmission via Bluetooth is tested and a measurement unit is designed and implemented. At the end of the thesis are achived results summarized.
|
|
|
Programmable resistance decade
Rusnák, František ; Havránek, Zdeněk (referee) ; Kunz, Jan (advisor)
Goal of this work is design of programmable resistance decade controlled by microprocessor from the family STM32. The resistance decade will be used for testing energy harvesters. The theoretical parts deals with market research of commonly available resistor decades. The first designs of resistance decade were created. The principles of working can be multiple. The standard principle of working resistance decade is based on resistor rows switched by relays. The work also deals with solutions where is complex resistor rows replaced by electronics active components. In the practical part of this thesis, active design was designed builded and measured for all its range. Resistor decade can generate resistance from 100 Ohms to 10 mega-Ohms. Protocol SCPI allows to use this device in automated measurement.
|
guest ::
