|
|
Monitoring differential pressure of filters
Vacek, Jiří ; Kratochvíl, Petr (referee) ; Hammer, Miloš (advisor)
In this bachelor thesis is at first dealt with pressure, pressure, manometers, technical diagnostics and monitoring. In next part is analysis of methods of particle filters on basis of published academical papers. Following part introduces reader with current state of filter monitoring in production areas of BOSCH DIESEL ltd. and continues with choosing of pilot area for application of differential pressure monitoring method and designs solution itself. In the last part of the thesis is simple financial analysis and roll-out ideas for this method.
|
|
|
Safety of technological systems
Jiříček, Petr ; Pavlík, Josef (referee) ; Hammer, Miloš (advisor)
The work deals with the safety of technological systems and can be divided into two main thematic units. The attention in the first theoretic unit is paid to aspects that affect the safety of technological systems during their technical life. It describes, together with elementary norms and acts solving the products safety, the most important principles for creating and analysing the safety. It clarifies the origin of company’s risk management, part of its quality management, mentions the faults in which products can be found and also describes the failures which have the biggest effect on these faults and of course on the safety too. Attention is further paid to the reliability analysis, as the tool that helps to create the products safety in the pre-manufacturing phase and also to technical diagnostic, as the tool to keep the safety in after-manufacturing phase. The second practical unit arithmetically analyses the safety of two high-voltage transformers. For that it was used the database of real operation numerical values that were gained during diagnostic investigations on these transformers. In addition it describes mentioned diagnostics methods and gives the new procedure for analyse of transformers’ safety by criteria matrix and weighted sum approach. The main contribution of the work can be considered the checkout and the evaluation of this procedure for use in elaboration of high-voltage transformers diagnostic values for analyzing their safety.
|
|
|
Principles of maintenance of the TPM method
Zahradníček, Lukáš ; Hammer, Miloš (referee) ; Řezníčková, Hana (advisor)
This master thesis concerns modern method of TPM used in the production companies for maintenance of machinery. In the theoretical part, general maintenance is first described, as well as the TPM method. There is also described the technical diagnostics, which was emphasized in the practical part in terms of the use of vibrodiagnostics in predictive maintenance. In the practical part there is presented the proposal for introduction of the TPM method at the SMC Industrial Automation s.r.o. in Vyškov.
|
|
|
Electrical machines fault simulator
Krátký, Michal ; Krbal, Michal (referee) ; Šlezingr, Jan (advisor)
The goal of this bachelor’s thesis is the laboratory task focused on vibrodiagnostics of rotating electrical machines. The thesis is divided into theoretical and practical part. The theoretical part is made of information related to rotating electrical machine mainly its faults and technical diagnostics. Besides that the vibrodiagnostics is involved into the theoretical part as well. The practical part deals with the design of laboratory task focused on vibrodiagnostics of rotating electrical machines. There is shown how vibrations influence the machine during the operation. There is used asynchronous machine 1LA7080 and vibrometer MV-5L and noncontact tachometer UNI-T UT372 for this experiment. The second task is the starting current diagnostics. The starting current ofthe engine with the rotor asymmetry 1LA7080 and rotor symmetry 1LA7090 is going to be analyzed here. On these engines will be shown, how current flicks affectthe magnetic field of the engine in the air gap.
|
|
|
Diagnostic system of paper machine
Škrobánek, Martin ; Jankových, Róbert (referee) ; Zuth, Daniel (advisor)
This master thesis deals with the technical diagnostics, focusing mainly on vibration diagnostics. This problematice is described in the first part of this work on a theoretical level. The next part describes the paper machine, diagnostic system and the measuring points are classified into databases. The practical part of this work consists of a proposal for the methodology of vibration diagnostics for a paper machine, the procedure for measuring and evaluating the measured values. Part of the work is also a practical example of the measurement of the central cylinder, on which the procedure is tested, and the compilation of new limit values.
|
|
|
Life management of power oil transformer
Čechová, Karolína ; Froehling, Kenneth (referee) ; Sedláček, Pavel (advisor)
Pro pochopení významu procesu řízení životnosti výkonových olejových transformátorů, je nutné si nejdříve uvědomit jejich roli v elektrizační soustavě. Používají se především ke zvýšení a snížení napěťových úrovní v přenosové a distribuční soustavě dle aktuálních potřeb. Nespolehlivost výkonových olejových transformátorů může způsobit narušení stability dodávky elektrické energie, což představuje značné finanční a technické ztráty pro společnosti, které spravují tento typ zařízení. Z tohoto důvodu jsem se rozhodla napsat práci, která poskytuje přehled o procesu řízení životnosti, popsáním jeho ekonomických přínosů spolu s technickými diagnostikami, které napomáhají ke zjištění vznikajících poruch během provozu výkonových olejových transformátorů. Hlavním záměrem této práce je popsat a dokázat důležitost procesu řízení životnosti a využití diagnostických metod ke sledování parametrů transformátoru, které slouží jako prostředek ke zjištění možných poruch. Praktická část je zaměřena na navržení vhodných diagnostickým metod pro měření zvolených parametrů vybraného výkonového olejového transformátoru. Poté je provedena analýza zvolených parametrů a na základě jejích výsledků, je určen celkový stav vybraného výkonového olejového transformátoru.
|
|
|
Online diagnostics of machine tools
Zářecký, Tomáš ; Huzlík, Rostislav (referee) ; Zuth, Daniel (advisor)
This thesis deals with vibration diagnostics and on-line monitoring systems of several producers. Furthermore, this thesis contains a description and evaluation of measuring the vibrations of the machine tool spindle when machining test samples with different cutting conditions and evaluating the surface quality of test samples.
|
|
| |
|
|
Indirect vibration analysis using a mobile phone microphone
Plodková, Zuzana ; Huzlík, Rostislav (referee) ; Zuth, Daniel (advisor)
The bachelor thesis deals with the possibility of using a recorded signal from a mobile phone for vibration analysis. The first half of the thesis is a research generally dedicated to microphones, microphones in mobile phones and technical diagnostics. The chapter about microphones discusses the principle of their operation, further it analyzes the most important technical parameters and finally divides microphones according to their construction. In case of microphones in mobile phones there is mentioned the most commonly used type of microphone and its structure including a description of possible sound filtration. Possible ways and approaches to processing the measured signal are mention in the chapter abou technical diagnostics. The second part of the thesis is devoted to repeated measurement and subsequent processing of measured values. An evaluation of efficiency of the method of measuring the signal with a mobile phone for vibration analysis by comparison with the results obtained by a professional measuring technique follows.
|
|
|
Methods of Technical Diagnostics
Klusáček, Stanislav ; Ďaďo, Stanislav (referee) ; Němec, Zdeněk (referee) ; Tůma, Jiří (referee) ; Bejček, Ludvík (advisor)
The main objective of the presented thesis is to contribute to the development of diagnostic methods for piezoelectric sensor testing. The thesis describes the methods for piezoelectric sensors microcracks identification and diagnostics. The core of the thesis presents the development of a knock sensor prototype, design of suitable methods for the knock sensors diagnosis and evaluation of developed methods with focus on detection of microcracks in the sensor piezoceramic. The last part of the thesis deals with the influence of cracks and splits on the measured data from the piezoelectric transducer. The presented methods are focusing on impedance measurements and sensors frequency response measurements. Known properties of used piezoelectric material as an information source for measurement and diagnosis are provided. The main result of the work is the evaluation of the methods developed for the piezoelectric sensors self-diagnosis.
|
guest ::
