|
|
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.
|
|
|
Laser vibrometer with 2D scanning system
Rajm, Martin ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
This thesis deals in the theoretical part with the non-contact vibration measurement by single point Laser Doppler vibrometer and it concretes constructions used in practice. It deals also with the possibilities of the laser beam scanning to measure the vibrations in the plane and there are also listed suitable-commercial systems for this solution. Mentioned sweep is immediately necessary for 2D scanning vibrometer construction. In the practical part, the single-point laser vibrometer OFV-5000 was expanded by scanning galvo system, supplemented by a measuring cards for signal acquisition from the vibrometer and suitable control hardware was chosen for mentioned laser. For the resulting hardware assembly was designed and implemented in LabVIEW measurement software, to control the 2D scanning system, to set the position of the laser beam and to process and to visualize of measured vibration signals in the plane. The functionality of the developed measuring system was checked by performed measurement and visualization of the velocity vibration of restraint girder, excited by shaker.
|
|
|
Visualization of sound fields
Kovář, Petr ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
This bachelor's thesis deals with problems of acoustical field visualization using near-field acoustical holography. This method is often refered as NAH. Within the thesis the basic acoustical field variables are processed and described. Two algorithms were analysed, namely the Statistically Optimal Algorithm (SONAH) and the Iterative Algorithm using the Fourier Transform (STFT) with a K-filter (Wave-Domain Filter). These algorithms are described in detail. The outcome of the practical part of this thesis is the application for sound pressure visualization. The application is created in the LabVIEW environment from the known codes and the calculation of the sound pressure is performed with one of the two algorithms described in this thesis. From depicted acoustical maps the disadvantages of this method and differences between algorithm are shown. These algorithms are then compared according to speed of the calculation.
|
|
|
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.
|
|
|
Object programming in LabVIEW 8.5
Roháč, Josef ; Havránek, Zdeněk (referee) ; Čejka, Miloslav (advisor)
The aim of this work is to clarify and to familiarize users with the problem of object programming in LabVIEW version 8.5. In the introduction outlining the principle of LabVIEW as such a recall when it was first implemented programming object in the development environment. Furthermore, gradually examines the theory of classes and objects, their creation, basic properties, use in the block diagram and the various settings of the objects required for their proper and full use in the programming. The theoretical part of the end of the study the inheritance hierarchy between objects, and even deals with dynamic and static inputs and outputs. For the idea of the differences between the object programming in LabVIEW and C++ is included comparison of mechanisms and principles theoretically and clearly on the example programme. It also compares classical dataflow approach and object programming in LabVIEW. And finally they are accompanied by two developed by the task, including manual.
|
|
|
Wireless measurement module for vector calibration
Vaca, Pavol ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
Thesis discuss calibration methods for 3D acceleration sensors and implementation of the design of wireless measurement module for vector calibration. In this thesis are described principles of ellipsoid fitting problem and uses of this principles for calibration of accelerometer. Thesis contains short overview of principles used in MEMS accelerometers. Described calibration methods were implemented in Android application. Furthermore, the thesis describes Bluetooth Low Energy wireless technology. This communication technology is used for transferring data from measurement module to smart device. The result of this thesis is Android application for wireless vector calibration of MEMS accelerometer and presentation of practical results of this calibration.
|
|
|
Smart distance measurement module for football robot
Hrbáček, Jan ; Honzík, Petr (referee) ; Havránek, Zdeněk (advisor)
Diplomová práce se zabývá vývojem dálkoměrného modulu určeného pro rozšíření senzorické výbavy fotbalového robotu kategorie MiroSot. Tento modul na vstupu přijímá data ze senzorické jednotky vyvinuté na Ústavu automatizace a měřicí techniky a z těchto dat extrahuje polohu míčku. Je srovnáno využití neuronové sítě a zjednodušené Houghovy transformace pro získání polohy těžiště míčku. V práci je popsána pomocná implementace funkcionality v prostředích MATLAB a C#.NET i hlavní implementace pro signálový mikrokontrolér Freescale MC56F8013. Výsledný modul splňuje nároky zadání a je plně funkční.
|
|
|
Acoustic sensor with ICP power and electronic datasheet
Dvorský, Pavel ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
The task of this Bachelor’s thesis is to introduce IEEE 1451.4 standard and connection of sensors with ICP supply to data acquisition systems. It deals with realization of acoustic pressure sensor (microphone) with ICP (CCLD) supply and possibility of saving real parameters of this sensor into transducer electronic datasheet (TEDS). Finally there is shortly described work with TEDS in LabVIEW programming environment.
|
|
|
Qualitative comparison of MEMS vibration sensors
Hasík, Stanislav ; Havránek, Zdeněk (referee) ; Klusáček, Stanislav (advisor)
The aim of this bachelor thesis is a qualitative parameter validation of MEMS vibration sensors using calibration devices from the companies SPECTRA a Brüel & Kjr. First part of study deals with different types of MEMS vibration sensors on the piezoresistive, capacitive and thermal principle of operation. The study also deals with primary and secondary methods of calibration of vibration sensors and devices used for these calibration methods. The second part of the thesis is to use the calibration chains and secondary calibration methods to verify the sensitivity and temperature dependences of three particular MEMS accelerometers from the companies STMicroelectronic, MEMSIC and Panasonic. The measured characteristics are compared with catalog datasheets. In the end of the thesis are also discussed the possibility of the suppression these temperature effects.
|
|
|
Estimation of standard uncertainty of temperature
Beníšek, Ondřej ; Havránek, Zdeněk (referee) ; Šedivá, Soňa (advisor)
The bachelor thesis deals with determination of uncertainties of direct and indirect measurements by classical method (GUM) and Monte Carlo method. Specifically, it focuses on determining the uncertainty of the entire measuring chain when calibrating temperature sensors. It contains a design of a measurement experiment for calibrating temperature sensors in a calibration device with data transfer to a computer by a communication interface using a measuring instrument. The procedure for determining the uncertainty of the temperature measurement entering the proposed measurement is also given. The thesis also describes the realization of the practical measurement and the calculation of the standard uncertainty for the measurement by the classic method and Monte Carlo method. The results obtained are compared and evaluated.
|
guest ::
