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Optimization of location specimens in temperature chamber
Severa, Tomáš ; Pulec, Jiří (referee) ; Šandera, Josef (advisor)
This work is focused on the temperature distribution in thermal chamber CTS. The temperature in the chamber is measured using thermocouples. The measured values are graphically plotted and evaluated. The temperature distribution in the chamber is simulated in ANSYS Workbench. After optimization of the thermal decomposition, is carried out simulations with DPS. It describes the temperature chamber CTS module Omega TC - 08 and software for the thermal simulation ANSYS Workbench.
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Machanical testing of solder joints
Drab, Tomáš ; Šandera, Josef (referee) ; Szendiuch, Ivan (advisor)
The project contains theoretical research of electrotechnical manufacture for lead-free reflow soldering. It contains characterization of soldering processes. Includes variations of solder paste printing, principles of part placing and also reflow soldering process. The project appoints possibilities of testing solder joints strength, mainly focused on mechanical vibrations. It describes a design and preparation of solder joint strength test methods by mechanical vibrations. It compares influence of vibrations on part types and solder alloys.
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Internet Interface for Teaching and Learning
Belko, Jakub ; Magát, Martin (referee) ; Šandera, Josef (advisor)
Bachelor thesis Web interface for presentation and training applications is capable of presenting learning texts made in PowerPoint. The application allows queries over viewing the presentation and provides communication between teacher and student. The application was created so that it could not control user-consuming. In implementation used only freely available JavaScript libraries. Bachelor's thesis is largely implemented the instructions for use applications.
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Lead Free Solder Joint - Models for Reliability Prediction
Nestrojil, Michal ; Šandera, Josef (referee) ; Starý, Jiří (advisor)
This bachelor's thesis deals with reliability prediction of lead-free solder joint. Background research of fatigue models for lead free solder joint.is described in theoretic part Basic terminology and lead free soldering technology operations are mentioned in the theoretical part too. The practical part is dealing with observation of resistivity and solder joint strength during thermal cycling. Evaluation of results and experiments and posibility for future application of these results for fatigue model realisation is discussed in the end of this bachelor's thesis
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Control unit for monitoring of climatic conditions in the breeding of edible insects
Chmelař, Vít ; Šandera, Josef (referee) ; Adámek, Martin (advisor)
This bachelor thesis introduces the problematics of edible insects, Arduino platform, sensors and peripherals that will be used to construct a device which monitors conditions of breeding of insects. It describes the different type of sensors and their principles. It discusses the SPI and I2C communication, which is used for communication with peripherals and describes the selected sensors and peripherals with which will be builded the device. Measured values are displayed on devici and savet to memory card.
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Thermal aging of lead-free low-temperature joints
Jansa, Vojtěch ; Šandera, Josef (referee) ; Adámek, Martin (advisor)
The aim of this masterś thesis is to investigate properties of lead-free low-temperature solders after termal aging. The theoretical part is focused on various types of lead - free solders, pastes used for the manufacture of electrical circuits by thick-film technology and methods of testing the properties of the soldered joints. The practical part deals with the design and production of test substrates for testing the solder joints formed between the SMD component and the ceramic substrate. Two solder bismuth-containing solder was selected for testing, the SAC solder was selected as the reference. After aging with temperature cycling from -30 ° C to 115 ° C, the data obtained by testing the mechanical strength of the solder joint by the shear test is evaluated.
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Value stream optimisation
Zátopek, Jakub ; Šandera, Josef (referee) ; Novotný, Radovan (advisor)
This master's thesis is dealing value stream optimisation of finished goods in company Continental Automotive Systems, s. r. o. between production lines and expedition in terms of lean production methods and industrial engineering. The first part deals with theoretical training methodologies and understanding of lean manufacturing and industrial engineering. The second part analyzes the value stream of finished goods between production lines and expeditinon, identifying bottlenecks and design improvements.
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Electronic attendance system
Valent, Adam ; Levek, Vladimír (referee) ; Šandera, Josef (advisor)
The goal of the bachelor thesis “Electronic Attendance System” is create a full-featured interactive and modern attendance system with web page, server and database. Employees will be able to create attendance records by attaching the RFID chip to hardware part of an attendance system. Database records will be possible to browse, edit end export to a CSV file.
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Vacuum tube audio amplifier
Hrubý, Ondřej ; Šandera, Josef (referee) ; Musil, Tomáš (advisor)
This bachelor´s thesis deals with a design and simulation of an audio power amplifier using vacuum tubes to process a phono level signal. The frequency response of suggested solution should comply with the norm specified by RIAA. It also describes a principle of usage a magnetodynamic pick-up, reproduction quality requirements, vacuum tube basic description and also its advantages for audio applications usage. Last part contains a comparison of the vacuum tube and semiconductor amplifier considering signal distortion of the active elements.
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Temperature control in the liquid thermostat using Atmel ATmega328 microcontroller
Hanulík, René ; Šandera, Josef (referee) ; Adámek, Martin (advisor)
This bachelor‘s thesis familiarizes reader with the issues of temperature control and measurement in the enviroment of liquid thermostat. Thesis describes some kinds of temperature sensors, their physical principes and choices of using them. There is also described properties of ATmega328 controller and communication resources. This thesis deals with implementation of bath thermostat controller unit and describes his software equipment together with PC controlling application.
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