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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Návrh a realizace zařízení pro měření síly v tahu u SMD / Design and realization of the pull strength measuring device for SMD

Valíček, Jan January 2013 (has links)
This thesis deals with the design and implementation of a device for measuring pull strength by surface mounted devices (SMD). It analyzes the theory of pull strength testing of solder joints with emphasis on standard IEC 62137-1-3 and describes the selection of components utilized to create mechanical construction and electrical parts. These electronic parts made or innovated in this work were control system based on microcontroler Atmega164P, power circuit for stepper motor and communication of measure equipment TEST 321 with PC. The whole design is complemented by simulation of mechanical stress to the critical components using ANSYS. The conclusion summarizes the most important parameters of this equipment.
42

Tříosé ovládání tiskového stroje / 3D Printing Machine Control

Kočár, Darius January 2010 (has links)
This thesis is about creating library for control of the 3D printing machine. Printer active axes are realized by stepper motors from Microcon Corporation connected with CD30x control unit. Communication between application and control units is via RS232 serial link. Part of this work is dedicated to application showing typical usage of this library.
43

Systém pro bezkontaktní měření otoku končetiny / System for contactless ultrasonic measuring of edema

Zahradníčková, Ludmila January 2017 (has links)
Determination of the extent and state of a limb edema is based on information about its current volume. There are a number of methods for volume measurements. The theoretical part of this semestral thesis discusses the etiology, classification and principles of volume measurements and basic information about ultrasound and stepper motors. The practical part consists of a design of own device for a contactless limb volume measurement with ultrasonic module. It consists of a code for a microcontroller which controles the whole system including the computational operations and a real model of the system.
44

Objektivizace efektu Dynamické Neuromuskulární Stabilizace na opěrnou funkci nohy pomocí přístroje Senno Gait / Objectivization of Dynamic Neuromuscular Stabilization effect on foot supporting function using Senno Gait device

Hejdová, Tereza January 2019 (has links)
The thesis evaluates the immediate effect of one therapeutic unit that using Dynamic Neuromuscular Stabilization (DNS) on the foot support function. The aim of the experiment was to verify effect of a single DNS therapeutic unit would to the determined parameters. The main expected effect was the optimization of the dynamic function of the foot and achieving better stability during the stance phase of a gait cycle. Methods: For the study, the asymptomatic group of 30 probands aged 24-36 years, 10 men and 20 women was selected. Fifteen probands were randomly divided to two groups - fifteen experimental group and fifteen to the control group. Subjects enrolled in the experimental group were measured before and after one forty minute therapeutic unit of DNS concept. The control group underwent two measurements at the same time interval, but without the therapeutic unit. The Senno Gait instrument was used for measuring. It contains insoles with motion sensors. It collects the data at a 100 Hz sampling rate for 1 minute while walking at its own normal speed. Results: Compared to initial examination, the significant shortening of the standing phase in the left lower limb (p = 0.003) and in the right lower limb (p = 0.034) was observed. The gait rate was unchanged after the DNS therapy in the...
45

Vliv ploché nohy na stabilitu hlezna u hráčů florbalu / The effect of flat feet on the stability of the ankle joint of floorball players

Hanušová, Barbora January 2016 (has links)
Title: The effect of flat feet on the stability of the ankle joint of floorball players. Objectives: The main aim of this thesis is to determine whether a flat feet has any effects on the floorball players' ankle joint stability. Furthermore, the thesis focuses on the chronic ankle instability, other leg pathologies and on the options of therapeutic interventions. Eventually, the thesis provides summary and output data for physiotherapist, sport couches and the examined players. Methods: First a literature study was conducted to establish a theoretical framework. Based on the feature/aspect examination of longitudinal foot arching and an initial questionnaire 10 particular subjects aged 22 to 29 were selected, all of them form the TJ Tatran Střešovice team. The subjects were divided in 2 groups - with longitudinal flat feet and without longitudinal flat feet pathology. The examined subjects were scored with negative points according to occurrence of any pathologies. Both groups were also benchmarked in the Star Excursion Balance Test that determined feet dynamic stability index. Results: The examination proved that flat feet affects the stability of the ankle joint as the subjects of the group without longitudinal flat feet scored results that were 31% better than results of the subjects with...
46

Systém automatického ladění pro sedmistrunné kytary / The automatic self tuning system for seven-string guitars

Jeřábek, Vojtěch January 2017 (has links)
The thesis describes a realization of the automatic self tuning system for sevenstring guitars. There are comparisons of commercial and uncommercial solutions for six-string guitars. There is also evaluation of useful parts for seven-string guitars. Thesis contains a description of a requirements for individual parts and a control software with respect on real guitar properties and used computing algorithm. In the second part of thesis, there is a description of final system design and its realisation including the control software. This is also related with testing of the entire system.
47

Návrh speciálního anténního rotátoru / Design of special antenna rotator

Půhoný, Jan January 2010 (has links)
This master's thesis deals with design electronics for an antenna rotator in two axis. There are designed and implemented drivers for two stepper motors. Was also designed and implemented control panel that allows manual control the rotator and remote control by PC via USB. At the same time created software for control panel and PC application for easy operation.
48

Automatický tester HMI / HMI automatic tester

Lang, Stanislav January 2011 (has links)
This thesis is dedicated to the automation of tests of the thermostats developed by the company Honeywell. The first chapter presents a problem of self-testing of thermostats, followed by a discussion of possible approaches to solutions. Attention is paid to testing the functionality of the HMI of thermostats, especially to the part of the system, that deals with activation of touchscteen, but no other part of the problem are omitted in the text. Discussions of the problematic passes into the design and implementation of specific design solutions. The selected design of 3D-router, which moves in three orthogonal coordinates and resembles to a coordinate drill for example. First, it describes the basic concepts of mechanic and electronic part of equipment, and subsequently is designed and implemented control electronics for mechanical activator HMI. Each of the electronics components are described in detail and values of parts are based on the calculation with the exception of finished parts. The proposal of the electronics follows the possibility of maximization of universality module for applications in similar applications. The functionality of the electronics is controlled by a microprocessor with a custom program that is described in the work. Source code of some the programs is not available because it is know-how of the company. Next part of the thesis deals with optimization of the moving of axes, optimization is done empirically by measuring. An important issue is compliance with the accuracy required position, also part of the work is devoted to the issue of calibration position. Finally is solved the continuity on the superior system. It is designed and implemented the upper layer of the communication protocol used in the company. Work is the solution of specific corporate award thesis. Although it is a very specific role of the works are generally applicable for other applications. In particular, the proposed electronic represents relatively universal controller for stepper motor control.
49

Dvoukanálový kontrolér krokových motorů / Two channel stepper motor controller

Hýbl, Matouš January 2021 (has links)
Cílem této práce je vývoj dvoukanálového kontroléru krokových motorů. V rámci práce je popsán jak vývoj elektroniky, tak vývoj příslušného software. Elektronika kontrolŕu je založena na mikrokontroléru STM32F405 a driverů krokových motorů vyráběných firmou Trinamic. Pro komunikaci s nadřazenými systémy je implementován protokol CANOpen a sběrnice I\textsuperscript{2}C a USB. Elektronika byla navržena v software KiCAD and využívá čtyřvrstvého plošného spoje a moderních výrobních technologií. Co se týká software, byl vyvinut jak firmware pro mikrokontrolér, tak software pro ovládání kontroléru. Obě části software využívají programovacího jazyka Rust, který se zaměřuje na bezpečnost práce s pamětí, rychlost a zero-cost abstrakce. Sekundárním cílem této práce je ukázat, jak lze tento programovací jazyk s výhodou použít pro programování nízkoúrovňového embedded software. Firmware kontroléru implementuje nezávislé řízení pohybu obou os kontroléru a to jak v rychlostním, tak v pozičním režimu a zároveň implementuje bezpečnostní funkce pro případy selhání komunikace. Výsledný kontrolér by měl být použit v rámcí výzkumné skupiny Robotiky a Umělé Inteligence a studenty na Ústavu Automatizace FEKT VUT.
50

Binokulární vidění / Binocular vision

Brňák, Jan January 2012 (has links)
This masters thesis deals with the physiology of binocular vision people for obtaining two dimensional spatial perception of images with glasses. There are developed theoretical part of the physiology of vision, then writing available methods that are now widespread for obtaining stereoscopic scene. The work also describes shooting dynamic scene using a pair of identical cameras. It focuses mainly on OFF-AXES method and deals with the topic of the settings stereoscopic base. There is also realized a practical part, which works with the capture dynamic scenes using video cameras with a automatic control of cameras distance. Automatic control is performed using the parallel port and a stepper motor. For this purpose it is designed to work in hardware support and a program for mutual communication. Filmed a short movie was screened to a group and those observers evaluated the parameters that were specified in the created poll.

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