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Breathing simulator
Stejskal, David ; Jedelský, Jan (referee) ; Lízal, František (advisor)
The purpose of this thesis was to create realistic breathing cycles for breathing simulator and than to verify the functionality of the simulator. The first section of this thesis was conceived as an general introduction to problematics of breathing. This section describes the construction of the lungs, the breathing mechanism and lung volumes. The subject of this study were also important factors that affect human respiration. Processing of acquired data and creation of breathing cycles for breathing simulator is described in the second section of this thesis. Five specific breathing patterns were created. The experimental verification of the breathing simulator functionality is part of the second section.
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Smart signaling unit
Stejskal, David ; Bradáč, Zdeněk (referee) ; Baštán, Ondřej (advisor)
The essence of this bachelor thesis is a complete design of hardware and software solutions and subsequent implementation of a Smart Signaling Unit. It is intended to replace the currently installed signaling beacons and to improve the existing testbed Self-Acting Barman with its features. The designed device is able to signal machine states according to the PackML standard. It can also communicate via Ethernet using the industrial communication protocol Modbus TCP, while implementing a Modbus server, which provides services for other connected devices (Modbus clients). The device also implements the Power over Ethernet (PoE) standard, thanks to which it is possible to power the signaling unit directly via an Ethernet cable, on which communication also takes place. At the beginning, the main goals of the work are presented together with the requirements for the Smart Signaling Unit. Subsequently, the importance of signaling units in the industry is explained and the basic parameters for the selection of a specific product are given below. Following this, a survey of available signal towers on the market was carried out. In the theoretical part of the work, the Industry 4.0 initiative is first described in more detail, on the basis of which the testbed Self-Acting Barman is briefly introduced. The following is a comprehensive description of the industry standards PoE, Modbus TCP and PackML used in device design. The concept of the signaling unit already belongs to the practical part of the thesis and deals with the methods of display, which represent the primary function of the Smart Signaling Unit. An integral part is the hardware concept, which describes the most important used components. The final part of the work deals with the creation of a printed circuit board and the development of firmware using the Visual Studio Code development environment and the framework ESP-IDF from the company Espressif.
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Concept of AC as an Effective Recruitment Tool in the Financial Institution
Trepková, Dana ; Stejskal, David (referee) ; Konečná, Zdeňka (advisor)
The goal of this study is to propose a concept of Assessment Centre as an effective recruitment tool for a personal banker in the financial institution. The theoretical part describes general process of a recruitment and a Assessment Centre method. The effectivity of this method is compared with other recruitment methods. It also depicts the objectives of the method and mentions utilized methods. Attention is paid to particular AC stages, from finding out demands and requirements of the Assessment Centre up to evaluation of the data, which had been obtained during AC. The aim of the practical part is to bring a concept of AC for a recruitment of a personal banker in particular financial institution and to assess whether the AC method is suitable for recruitment in that case, together with economic evaluation in comparison with classic recruitment method.
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System of On-/Offline temperature measurement based on Lab View
Stejskal, David ; Hammer, Miloš (referee) ; Prostredník, Daniel (advisor)
The objective of this thesis was to create a LabVIEW-based program for temperature measurement using a personal computer. The program allows reading and post processing of digital signal from a measuring device. This device consists of a sensor type PT100, a measuring transducer and an analog-to-digital converter with USB output. The theoretical part of the thesis deals with resistance temperature sensors, signal analysis and methods for signal processing. The practical part is conceived as a guide to the created program. This part introduces vital sub-elements of the program and describes their principle, practical use and also the operating instructions. As required by thesis assignment, practical part includes verification of the measuring device, which was performed in laboratory of Czech Metrology Institute in Brno.
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Monument procedure - Measuring during repairs of carpentry structures
Stejskal, David
In this text, the author presents several measurement procedures intended for the repair of valuable carpentry structures. This is not a comletely exhaustive overview of individual options or a comparison of different methods. However, the selected examples summarize the most interesting experiences from twenty years of practice and experiments. For carpenters with varying degrees of expirience, the text tries to offer a number of inspiring insights thet can be used in a creative way even in conditions thet are quite different. Imporved measurement without unnecessary excesses decisively pushes the current limits of technical possibilities, thereby opening th way to more advanced repairs.
Fulltext:  PDF; PDF
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Testing station for PCB device check
Stejskal, David ; Baštán, Ondřej (referee) ; Arm, Jakub (advisor)
The testing process is not an indispensable part only of production, it serves to verify the properties with regard to the specific requirements for the final product. The main purpose of testing is, without a doubt, to reduce the service costs in the future. It is certainly no surprise that there is an effort to automate this process as efficiently as possible, especially for larger series of products. The purpose of this master's thesis is to design a concept and subsequently an electrical, hardware and software solution of a testing device for the output inspection of manufactured printed circuit boards (PCB). The specificity of the work consists in the creation of a universal testing PCB that can program and debug AVR microprocessors and chips from the company Espressif, and at the same time it is able to perform automatic tests through the so-called customizable PCB. The customizable board is a designation for a test stand that must always be designed specifically for a particular product (tested PCB). To communicate with the peripherals used on this board, the test PCB exclusively uses the I2C bus, the great advantage of which is the need to use only one pair of wires. A service desktop application was created to control and visualize the test process.
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Smart signaling unit
Stejskal, David ; Bradáč, Zdeněk (referee) ; Baštán, Ondřej (advisor)
The essence of this bachelor thesis is a complete design of hardware and software solutions and subsequent implementation of a Smart Signaling Unit. It is intended to replace the currently installed signaling beacons and to improve the existing testbed Self-Acting Barman with its features. The designed device is able to signal machine states according to the PackML standard. It can also communicate via Ethernet using the industrial communication protocol Modbus TCP, while implementing a Modbus server, which provides services for other connected devices (Modbus clients). The device also implements the Power over Ethernet (PoE) standard, thanks to which it is possible to power the signaling unit directly via an Ethernet cable, on which communication also takes place. At the beginning, the main goals of the work are presented together with the requirements for the Smart Signaling Unit. Subsequently, the importance of signaling units in the industry is explained and the basic parameters for the selection of a specific product are given below. Following this, a survey of available signal towers on the market was carried out. In the theoretical part of the work, the Industry 4.0 initiative is first described in more detail, on the basis of which the testbed Self-Acting Barman is briefly introduced. The following is a comprehensive description of the industry standards PoE, Modbus TCP and PackML used in device design. The concept of the signaling unit already belongs to the practical part of the thesis and deals with the methods of display, which represent the primary function of the Smart Signaling Unit. An integral part is the hardware concept, which describes the most important used components. The final part of the work deals with the creation of a printed circuit board and the development of firmware using the Visual Studio Code development environment and the framework ESP-IDF from the company Espressif.
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System of On-/Offline temperature measurement based on Lab View
Stejskal, David ; Hammer, Miloš (referee) ; Prostredník, Daniel (advisor)
The objective of this thesis was to create a LabVIEW-based program for temperature measurement using a personal computer. The program allows reading and post processing of digital signal from a measuring device. This device consists of a sensor type PT100, a measuring transducer and an analog-to-digital converter with USB output. The theoretical part of the thesis deals with resistance temperature sensors, signal analysis and methods for signal processing. The practical part is conceived as a guide to the created program. This part introduces vital sub-elements of the program and describes their principle, practical use and also the operating instructions. As required by thesis assignment, practical part includes verification of the measuring device, which was performed in laboratory of Czech Metrology Institute in Brno.
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