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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.
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The fuel pump improvement, possibilities and limitation
Novotný, Vladimír ; Veselka, František (referee) ; Bušov, Bohuslav (advisor)
This thesis deals with common rail injection systems used at diesel vehicles. It contains an overwiev of manufacturers common rail systems, their construction and differences. The second part contains a description of Bosch Common Rail electrical and electronic components, and described ways of pressure control. Last chapter summarizes the possibilities for development and improvement of some parts of the system in the future.
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Penile plethysmography
Koudelková, Zuzana ; Harabiš, Vratislav (referee) ; Hrozek, Jan (advisor)
This bachelor´s thesis focuses on methods that examine volumetric changes of genital organs (especially for volume changes in male sexual limb). These changes are used in the sex diagnosis. The most common type of examination is to determine sexual preference of the patient. The aim of this work is to describe how have been the changes investigated previously and how they are investigating in the routine practice now. Find out which are their limits. Try to build a new type of sensor which could help to better evaluate the volume changes. And try to create a program in LabVIEW environment in which the measured data is displayed and stored.
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Analog front-end for piezoelectric sensor
Wich, Petr ; Chalupa, Jan (referee) ; Rubeš, Ondřej (advisor)
The purpose of the thesis was to describe and compare the properties of analog front end for piezoelectric sensor circuits. First, the basic circuit was described, then the design and implementation of the current-to-voltage converter, the charge amplifier and the circuit for voltage sensors on the parallel resistor. There was construct measuring system for measurement of the circuits. At last was made measurement of the created circuits, results were compared with each other, and their properties described.
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Analog front-end for piezoelectric sensor
Wich, Petr ; Chalupa, Jan (referee) ; Rubeš, Ondřej (advisor)
The purpose of the thesis was to describe and compare the properties of analog front end for piezoelectric sensor circuits. First, the basic circuit was described, then the design and implementation of the current-to-voltage converter, the charge amplifier and the circuit for voltage sensors on the parallel resistor. There was construct measuring system for measurement of the circuits. At last was made measurement of the created circuits, results were compared with each other, and their properties described.
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Application of acoustic emission for surface roughness definition
Hajtman, Benjamín
The surface quality or surface layer properties significantly affect the reliability and durability of component operations. The surface is described as a border which separates more objects or substances from each other. There are various types of tools which can be used to evaluate surface texture. A completely new method which helps to evaluate the surface roughness is the application of acoustic emission. In the experimental part were measured several surfaces of various materials by the set of acoustic emission and a gauge with a diamond tip. The recording was accomplished by two sensors, namely IDK-09 and MTPA-5. The results of the measurement were described, and the method is considered to be particularly successful when applied to hard materials.
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The fuel pump improvement, possibilities and limitation
Novotný, Vladimír ; Veselka, František (referee) ; Bušov, Bohuslav (advisor)
This thesis deals with common rail injection systems used at diesel vehicles. It contains an overwiev of manufacturers common rail systems, their construction and differences. The second part contains a description of Bosch Common Rail electrical and electronic components, and described ways of pressure control. Last chapter summarizes the possibilities for development and improvement of some parts of the system in the future.
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|
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Penile plethysmography
Koudelková, Zuzana ; Harabiš, Vratislav (referee) ; Hrozek, Jan (advisor)
This bachelor´s thesis focuses on methods that examine volumetric changes of genital organs (especially for volume changes in male sexual limb). These changes are used in the sex diagnosis. The most common type of examination is to determine sexual preference of the patient. The aim of this work is to describe how have been the changes investigated previously and how they are investigating in the routine practice now. Find out which are their limits. Try to build a new type of sensor which could help to better evaluate the volume changes. And try to create a program in LabVIEW environment in which the measured data is displayed and stored.
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