No (1066)
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1066
Remote Control for Steam Engines Models
Benda, David
Czech
The aim of this project is to create a remote control for radio controlled model of steamboat. The entire device consists of two parts - a transmitter and receiver. Data transmission modules were selected from the company HopeFR communicating in a frequency band of 433 MHz. Currently the device is outfitted for steering a pair of model servo motors and five digital outputs. Simple adjustment facility can be extended as required.
Keywords:
remote control; SPI; RFM01; RFM02; ATmega328; PWM
Available in a digital repository NRGL
Remote Control for Steam Engines Models
The aim of this project is to create a remote control for radio controlled model of steamboat. The entire device consists of two parts - a transmitter and receiver. Data transmission modules were ...
Bioimpedance Signal Processing
Valíčková, Vladimíra
Czech
This study deals with detection of important points in derivate bioimpedance signal that may be further used in various medical applications, for example in calculation of the Pulse wave velocity. This work compares three detection methods. The best results were achieved by a detection with fixed interval. Algorithms that are dependent on constant bioimpedance and length of RR interval perform worse.
Keywords:
bioimpedance; bioimpedance signal; time varying impedance; constant impedance
Available in a digital repository NRGL
Bioimpedance Signal Processing
This study deals with detection of important points in derivate bioimpedance signal that may be further used in various medical applications, for example in calculation of the Pulse wave velocity. ...
Medical Image Segmentation Based on Graph Cut with Shape Prior
Kozlová, Dominika
Czech
This paper deals with a graph-based image segmentation and its improvement by using the information about the shape of the object for creating specific graph architecture (template). Improved method allows the cut to prefer more complicated structures, especially when the image contains a lot of noise and the object is hardly indistinguishable from the background. Algorithm was tested on simulated data and real CT and MRI images of vertebra and brain in 2D. Method was also extended to 3D further purposes.
Keywords:
Medical image segmentation; Graph theory; Graph cut; Template
Available in a digital repository NRGL
Medical Image Segmentation Based on Graph Cut with Shape Prior
This paper deals with a graph-based image segmentation and its improvement by using the information about the shape of the object for creating specific graph architecture (template). Improved method ...
Propulsion System for Electric Scooter
Doležal, Lukáš
Czech
The paper is focused on a design of optimal propulsion system for folding portable scooter. The BLDC motor is used as a propulsion. The paper deals with the design of electronics for sensor control. Two control methods are compared: six-step commutation and vector control. Attention is given to efficiency of both methods and consecutive selection of the best of the two.
Keywords:
BLDC; PMSM; Vector Control; six-step; MC56f82748; Electric Scooter
Available in a digital repository NRGL
Propulsion System for Electric Scooter
The paper is focused on a design of optimal propulsion system for folding portable scooter. The BLDC motor is used as a propulsion. The paper deals with the design of electronics for sensor control. ...
An External User Interface With USB
Sládeček, Michal
Czech
This article deals with problems of developing user interface which can communicate with host system via USB. The article includes comparation of existing alternatives and description of USB class used for communication between external system. The main part of work is choosing hardware parts for device and definition of software structure. The aim is to design a schema and build a hardware prototype.
Keywords:
User interface; USB; hardware; display; joystick; Python
Available in a digital repository NRGL
An External User Interface With USB
This article deals with problems of developing user interface which can communicate with host system via USB. The article includes comparation of existing alternatives and description of USB class ...
Laser Target for Simulating Shooting Sport
Poloch, Martin
Czech
This work deals with complete design of a system for simulating shooting sport. Key aspects of the design are similarity with shooting from ordinary mechanical weapons, multifunctionality and low costs. The core of the simulation is a laser transmitter in the weapon and a photosensitive receiver in the target. The final version of the system is controlled by a group of microcontrollers and provides several types of feedback. For example lighting the place that has been hit with LED, sound signals, displaying shooting results, or evaluating them with a computer.
Keywords:
LASER; microcontroller; ATmega8; LED; photosensor
Available in a digital repository NRGL
Laser Target for Simulating Shooting Sport
This work deals with complete design of a system for simulating shooting sport. Key aspects of the design are similarity with shooting from ordinary mechanical weapons, multifunctionality and low ...
Printed Planar Inductor
Krejčí, Pavel
Czech
This work deals with issues of application of the thick film technology in the field of planar inductors. It presents the essential impact of parameters on designed coil. Subsequently it describes equation for calculation of inductance of single layer inductor. Finaly, exemples of designed coil are shown and some technological ways are proposed.
Keywords:
planar inductor; printed circuits; thick film technology; non-conventional application of thick film; Greenhouse formula
Available in a digital repository NRGL
Printed Planar Inductor
This work deals with issues of application of the thick film technology in the field of planar inductors. It presents the essential impact of parameters on designed coil. Subsequently it describes ...
Designing a Directional Acoustic Transmitter
Hladký David
Czech
In this paper the parametric transmission of sound through an amplitude-modulated ultrasonic wave, using automatic demodulation in a non-linear environment is discussed. Methods for the processing of the transmitted signal are presented; these techniques employ modified amplitude modulation to suppress the environmental effects, which otherwise distort the signal. A special emphasis is placed on the mathematical instruments describing the parametric sound beam transmission in a non-linear medium. Within our research, we fabricated a parametric speaker consisting of 50 ultrasonic acoustic transducers with the resonant frequency of 40 kHz. The functionality of the acoustic source was verified via measurement of the spatial radiation characteristics and through determination of the total harmonic distortion (THD). In order to control the parametric speaker, a digital element comprising a sampler, a transducer of the input transmitted signal, and a microcontroller to preprocess this signal and to facilitate the amplitude modulation of the ultrasonic carrier wave is designed. The applied algorithms were analyzed to establish their computational intensity; such an analysis enabled us to select a microprocessor basis suitable for the implementation of the signal processing algorithms.
Keywords:
Parametric acoustic array; parametric loudspeaker; amplitude modulation; STM32F411
Available in a digital repository NRGL
Designing a Directional Acoustic Transmitter
In this paper the parametric transmission of sound through an amplitude-modulated ultrasonic wave, using automatic demodulation in a non-linear environment is discussed. Methods for the processing of ...
FPGA Module for Fast Waveform Generation and Synchronous Data Acquisition
Eliáš, Josef
Czech
This article deals with system for fast waveform generation and synchronous data acquisition. System is used for evaluation of optical sensors by sweep through narrow band light source. The DAQ system use dual core ARM processor with build in FPGA array. We can achieve direct sharing memory between ARM core and AD/DA periphery through SoC architecture. Then we can optimally distributed core usage between processors and peripherals.
Keywords:
waveform; data aquisition; FPGA; SoC; ARM; AXI
Available in a digital repository NRGL
FPGA Module for Fast Waveform Generation and Synchronous Data Acquisition
This article deals with system for fast waveform generation and synchronous data acquisition. System is used for evaluation of optical sensors by sweep through narrow band light source. The DAQ system ...
Simulation of Static Grant Allocation in NG-PON2 Networks
Cymorek, Patrik
Czech
This paper deals with issue of static grant allocation. The main goal of this paper is to present functionality of NG-PON2 networks and describe static form of grant allocation. The first part of the paper is focused on development of passive optical networks. Subsequently Next-Generation Passive Optical Networks and simulation in OPNET modeler are described. In modeler own designs of node and process models are used.
Keywords:
NG-PON2; OPNET Modeler; Static allocation
Available in a digital repository NRGL
Simulation of Static Grant Allocation in NG-PON2 Networks
This paper deals with issue of static grant allocation. The main goal of this paper is to present functionality of NG-PON2 networks and describe static form of grant allocation. The first part of the ...
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