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Automatic detection of tool fracture in metal sheet punching
Kluz, Jan ; Rajchl, Matej (referee) ; Brablc, Martin (advisor)
This Bachelor thesis deals with the design and subsequent implementation of the realtime fault detection system during the sheet metal punching process with a tool of small dimensions (0.5 × 12 mm). The proposed system is important for significant ease of the operator's work, acceleration of the process of production, as well as saving of the company finance budget. The first part of this thesis deals with the theoretical background of the studied issue. The following part is a brief theoretical introduction to the field of digital signal processing. The next chapter presents methods developed for fault signals detection including speed enhancing and data flow reducing algorithms. The main examined methods were: frequency peaks, frequency bands, autocorrelation, frequency correlation methods and machine learning including deep machine learning. Deep machine learning of the neural network achieved the best results overall. Features from time and frequency domain were used for purposes of creating the classification model using machine learning. The possibility of developing the predictive maintenance system is also described, including research of this area in a modern industry. Subsequently, the achieved results and their evaluation are presented. The end of this thesis is dedicated to the description of the implementation of classification system into realtime form and connecting this system to the punching press computer using Arduino Uno microcontroller and basic signal control electronics. The proposed system has been successfully assembled, tested and put into on-site testing.
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Design of linear clock with LED digital scale
Javorský, Dominik ; Krčma, Martin (referee) ; Svoboda, Petr (advisor)
This bachelor thesis deals with the design and production of linear clocks with LED digital scale by 3D printing. The beginning of the work gives an overview of existing structural design and also a brief overview of today's electronic components used in the creation of linear clocks. In the following part, the work deals with the design and production of linear clocks. The output of the work is a functional model that satisfy the requirements of scale with a range of 12 hours and a resolution of 5 minutes. The work also contains drawing documentation of the assembly, selected components and software used to control linear clock.
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Design of linear clock controlled by Arduino Uno
Hladík, Ondřej ; Strecker, Zbyněk (referee) ; Svoboda, Petr (advisor)
The bachelor thesis deals with designing and realization of functional sample of linear clock with analog scale using 3D printing. Firstly, the structural arrangement of available devices and the selection of usable electronic components are solved based on the required parameters. After that, the work contains a design solution of printed parts, where the linear motion mechanism is designed as a rack and pinion and the feed of scales is solved using a sliding linear guide. The work includes a wiring diagram of used electronic parts. The Arduino Uno board takes care of the clock control, for which a program was created according to the required properties. In the end, the functionality on the created sample was verified. The work is accompanied by assembly drawings and drawings of the main parts and the complete program.
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Control of Linear Motor based on Ultrasonic Detection
Veselá, Klára ; Kolářová, Jana (referee) ; Sekora, Jiří (advisor)
The focus of this bachelor thesis is to do research on possibilities of contactless distancemeasurement and linear stage construction. The first part describes four types of enginespossible to use in linear stages, their principles, advantages and disadvantages. Nextpart is focused on possibilities of contactless distance measurement. Based on thedescriptions, the most suitable modules are selected for the design of the system. Thissystem will maintain a constant distance from the object by using contactless distancesensor and linear motors.
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Experimental workplace for research of car speed limiters
Kubát, Michal ; Možný, Radek (referee) ; Pokorný, Jiří (advisor)
The bachelor’s thesis deals with the issue of remote vehicle speed limitation. The aim of this work is to develop an experimental workplace where the speed limitation using connection to CAN bus will be tested. In the theoretical part, a research on existing solutions of speed limiters is conducted and their protocols and technologies are described. The theoretical part also includes a research and description of possible threats and attacks on technology ITS-G5. The practical part deals with the development of the experimental workplace that consists of an OBD-II simulator and a transmitter. The OBD-II simulator includes Arduino UNO and add-on modules, its communication is realised via CAN bus. Transmitter includes Arduino NANO. Then, a wireless communication between a transmitter and an OBD-II simulator on 433 MHz and the wireless speed adjustments are developed. Finally, the IVIM message is designed and implemented for car speed limitation. Its structure was selected according to ISO standards for communication in ITS-G5 technology. The implementation of this message was tested on an OBD-II simulator. On the whole, a complete experimental workplace was assembled, and its manual was created.
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Security and Privacy in IoT
Utěkal, Josef ; Dzurenda, Petr (referee) ; Malina, Lukáš (advisor)
The bachelor's thesis deals with the topic of security and privacy in the field of Internet of Things (IoT), for which resource constrained devices are typical. It is very important to find a suitable operating system that, in addition to low computational requirements, would also offer the desired functionality for these constrained IoT devices, such as real-time capabilities. OS RIOT seems to be the one for IoT. It enables you to run applications written in C language on any supported hardware -- in this bachelor's thesis specifically on Arduino Uno and Arduino Due. The thesis also describes several cryptographic libraries that are supported by OS RIOT. The aim is to implement selected cryptographic libraries and measure their computational and memory requirements on both Arduino devices. This is preceded by a theoretical and practical familiarization with OS RIOT, which is realized by creating the first project, and measuring the computational complexity of each cryptographic function of the WolfSSL library on the Raspberry Pi 4 Model B.
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Goniophotometer
Ivor, Martin ; Janáková, Ilona (referee) ; Honec, Peter (advisor)
The thesis deals with the design of a goniophotometer and the GUI (Graphical User Interface), capable of evaluating the photometric parameters of light sources and luminaires. The introduction contains theoretical information about photometry, photometric parameters, light sources, lamps, as well as the theory of measuring these parameters, and basic globally used data formats, designed to store the parameters of light sources. The core of this thesis, then describes the hardware, that makes up the proposed device, and the software needed to control the measurement process, visualization and storing the results. The conclusion is an evaluation of the functionality of the described device, and the measurements that were mediated by it, and an overall summary of the results achieved.
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Single-phase wattmeter
Kolouch, Petr ; Knobloch, Jan (referee) ; Huták, Petr (advisor)
This diploma thesis deals with wattmeters. The introduction is devoted to approach the issue. Subsequently, the principle of sensing of circumferential quantities, sampling theory and basic theory is explained. The next chapter discusses Arduino development kits. The practical part deals with the design of the circuit diagram and the printed circuit board. Further described is designed software. The final part tests the parameters of the designed power meter.
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Wireless Control of Embedded M2M Devices Using Unlicensed ISM Band
Štůsek, Martin
This research work follows the idea of Machine-to-Machine (M2M) communication designing the radio controlled devices using the ISM radio band of 433 MHz. Implemented solution consists of transmitter unit (Raspberry Pi) and sets of receiver units based on Arduino Uno platform. To offer better user experience, simple management interface on the side of transmitter is implemented.
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Active Prosthetic Hand
Svoboda, Michal
The aim of this thesis is to propose and produce prototype of active hand prosthesis. Prototype is based on myoelectric prosthesis principle, therefore it is meant to be controlled by EMG signals. In this specific case signals will be scanned from healthy arm. Arduino UNO development kit was chosen as the main controller. For measuring EMG muscle activity Shield EKG/EMG Olimax was selected.
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