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Tytuł:
Real Time Processing of Networked Passive Coherent Location Radar System
Autorzy:
John, M.
Inggs, M.
Petri, D.
Powiązania:
https://bibliotekanauki.pl/articles/226268.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
passive
PCL
real-time
GPU
Opis:
A Passive Coherent Location (PCL) Radar system, consisting of spatially distributed transmitters and receivers is currently being integrated at the University of Cape Town (UCT). The paper investigates the feasibility of real-time processing of PCL system signals using Graphic Processing Units (GPUs), specifically a study of two distinct clutter cancellation algorithms: ECA (Extensive Cancellation Algorithm) and NLMS (Normalised Least Mean Square). Clutter cancellation is the most computationally demanding part of PCL signal processing. This investigation compares the processing speed-up achieved by GPU over CPU implementations, with very encouraging results.
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 3; 363-368
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards the Safety Verification of Real-Time Systems with the Coq Proof Assistant
Autorzy:
Tveretina, O.
Powiązania:
https://bibliotekanauki.pl/articles/384877.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
formal methods
real-time
theorem proving
Opis:
Hybrid systems involve the interaction of discrete and continuous dynamics. Hybrid systems have been used as a mathematical model for many safety critical applications. One of the most important analysis problems of hybrid systems is the reachability problem. In this paper we argue that the proof assistant Coq can be used for the hybrid systems verification. An example of a train crossing control is provided.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 1; 30-32
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probabilistic Sequence Mining : Evaluation and Extension of ProMFS Algorithm for Real-Time Problems
Autorzy:
Hryniów, K.
Dzieliński, A.
Powiązania:
https://bibliotekanauki.pl/articles/226422.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ProMFS
sequential pattern mining
probabilistic mining
real-time
Opis:
Sequential pattern mining is an extensively studied method for data mining. One of new and less documented approaches is estimation of statistical characteristics of sequence for creating model sequences, that can be used to speed up the process of sequence mining. This paper proposes extensive modifications to one of such algorithms, ProMFS (probabilistic algorithm for mining frequent sequences), which notably increases algorithm's processing speed by a significant reduction of its computational complexity. A new version of algorithm is evaluated for real-life and artificial data sets and proven to be useful in real-time applications and problems.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 4; 323-326
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and application of real-time compensation of positioning precision of the turntable with a harmonic function
Autorzy:
Zhou, Yi
Zhu, Weibin
Shu, Yi
Huang, Yao
Zou, Wei
Xue, Zi
Powiązania:
https://bibliotekanauki.pl/articles/2173885.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
harmonic function
positioning error
compensation
real-time
CORDIC
Opis:
In order to guarantee the accuracy of turntable angle measurement, a real-time compensation method for turntable positioning precision based on harmonic analysis is proposed in this paper. Firstly, the principle and feasibility of the real-time compensation method are analysed, and a detailed description of harmonic compensation is provided herein. Secondly, we analyse the relationships between the surface number of the polygon with the compensation order of the harmonic function and its corresponding compensation accuracy. The effects of the iterations number and the data width on calculation accuracy in the coordinate rotation digital computer (CORDIC) algorithm are analysed and the quantization models of the approximation error and rounding error of the CORDIC algorithm are established. Then, the calculation of the harmonic error function and real-time compensation processes are implemented on a field programmable gate array (FPGA) chip. The resource occupation and time delay of the phase angle calculation and the harmonic component calculation are discussed separately. Finally, the validity of the harmonic compensation method is proven through comparing the compensation effect with that of linear interpolation and the polynomial compensation method. The influences of the compensation order, the iterations number and the data width on the compensation results are demonstrated by simulation. A test platform with a laboratory-made FPGA circuit is built to evaluate the effect of real-time compensation with the harmonic function and the positioning error compensation can be performed within 760 ns. The results confirmed the effectiveness of the harmonic compensation method, revealing an improvement of the positioning precision from 54.21ʹʹ to 1.63ʹʹ, equivalent to 96.99% reduction in positioning error.
Źródło:
Metrology and Measurement Systems; 2022, 29, 3; 553--571
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unmanned ship simulation with real-time dynamic risk index
Autorzy:
Brake, M. C. ter
Iperen, E. (W. H.) van
Looije, D.
Koldenhof, Y.
Powiązania:
https://bibliotekanauki.pl/articles/135142.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
autonomous ship
ship domain
simulation
dynamic risk
real-time
risk
Opis:
Currently there is growing interest in unmanned shipping. In the case of unmanned ‘autonomous’ shipping, navigation is automated by on-board decision-making systems. Important motives for unmanned ships include the shortage of skilled mariners, the facilitation of slow steaming strategies, efficiency improvements in confined shipping areas, and increased safety. The aim of the present research is to simulate an unmanned ship through an Automatic Identification System (AIS) based traffic situation. In order to do this, the Maritime Research Institute Netherlands (MARIN) will use the existing simulation technology Dolphin, implement a new tool to read AIS data, simulate a large amount of ships, and develop an auto-captain. The real-time dynamic risk index developed by MARIN will be integrated in Dolphin, to monitor nautical safety of all ships with focus on the unmanned ship. The simulated unmanned ship will navigate according to the International Regulations for Preventing Collisions at Sea (COLREGS). In more complex situations, the auto-captain may use a dedicated decision support tool to find a more efficient solution to pass safely. This approach will be analysed using the real-time dynamic risk index, which will be updated based on latest insights. This paper will discuss the latest development and plans in the unmanned ship simulation project.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 48-54
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of a Head Movement Navigation System for Mobile Telepresence Robot Using Open source Electronics Software and Hardware
Autorzy:
Wee, Tan Jia
Wahid, Herman
Powiązania:
https://bibliotekanauki.pl/articles/1844566.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
telepresence
head movement control
real-time
video streaming
Bluetooth communication
Opis:
Head movement is frequently associated with human motion navigation, and an indispensable aspect of how humans interact with the surrounding environment. In spite of that, the incorporation of head motion and navigation is more often used in the VR (Virtual Reality) environment than the physical environment. This study aims to develop a robot car capable of simple teleoperation, incorporated with telepresence and head movement control for an on-robot real-time head motion mimicking mechanism and directional control, in attempt to provide users the experience of an avatar-like third person’s point of view amid the physical environment. The design consists of three processes running in parallel; Motion JPEG (MJPEG) live streaming to html-Site via local server, Bluetooth communication, and the corresponding movements for the head motion mimicking mechanism and motors which acts in accordance to head motion as captured by the Attitude Sensor and apparent command issued by the user. The design serves its purpose of demonstration with the usage of basic components and is not aimed to provide nor research with regards to user experience.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 3; 379-384
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Embedded image processing on Raspberry Pi connectedto the industrial control system
Autorzy:
Hrbček, Jozef
Bubeníková, Emília
Powiązania:
https://bibliotekanauki.pl/articles/2064796.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
image processing
PLC
measurement
Raspberry Pi
real-time
embedded system
POWERLINK
Opis:
This paper deals with the image processing from the camera for Raspberry Pi connected with real-time communication network to the control system (PLC). The low time delay for receiving and sending commands, data, etc. is very important in the automating production processes. This can be provided by industrial real-time network based on Ethernet. The Ethernet POWERLINK, which is supported on B&R PLCs, is one of them. It is a simple solution for a variety of applications because the POWERLINK is publicly available as the open source. Connecting the PLC and Raspberry Pi with Ethernet POWERLINK opens up many applications in industrial automation. For example, image data obtained using a camera attached to Raspberry Pi can be used to sense image of manufacturing processes and products and evaluate their quality in industrial automation. This article focuses on an image processing unit and the PLC system with CPU redundancy used in the industrial application. Vision systems are often used to improve products quality control, saving costs and time.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 62--71
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Task jitter measurement under RTLinux operating system
Autorzy:
Moryc, P.
Černohorský, J.
Powiązania:
https://bibliotekanauki.pl/articles/384605.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
real-time
jitter
latency
measurement
RT-Linux
benchmark
workload effects
saturation method
Opis:
This paper deals with real-time task jitter measurement under RTLinux operating system. In the first part, it describes methods and tools developed to measure jitter in the RTLinux environment. In the second part, it is focused on discussion of results, obtained on PC hardware, and their interpretation.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 1; 62-65
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ATR Track III: the real-time GPS for public security
Autorzy:
Kwiecień, J.
Malinowski, M.
Bujnowski, S.
Bujarkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/225848.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
czas rzeczywisty
GPS projekt
bezpieczeństwo publiczne
real-time
GPS project
public security
Opis:
In the project a system was developed, that visualizes real time GPS navigation data over the public security system. Vehicles equipped with GPS/GSM unit can connect to the city security system (tel. 112) via Internet and multiple viewer users can track their motion in real-time. A client-server system passes GPS position data from the vehicles on the GIS editor and vector/raster MultiViewer application.
Źródło:
Reports on Geodesy; 2006, z. 2/77; 179-185
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of Sign Language from High Resolution Images Using Adaptive Feature Extraction and Classification
Autorzy:
Csóka, Filip
Polec, Jaroslav
Csóka, Tibor
Kačur, Juraj
Powiązania:
https://bibliotekanauki.pl/articles/226004.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sign language
gesture
sign
recognition
CNN
LoG
real-time
pattern recognition
machine learning
Opis:
A variety of algorithms allows gesture recognition in video sequences. Alleviating the need for interpreters is of interest to hearing impaired people, since it allows a great degree of self-sufficiency in communicating their intent to the non-sign language speakers without the need for interpreters. State-of-the-art in currently used algorithms in this domain is capable of either real-time recognition of sign language in low resolution videos or non-real-time recognition in high-resolution videos. This paper proposes a novel approach to real-time recognition of fingerspelling alphabet letters of American Sign Language (ASL) in ultra-high-resolution (UHD) video sequences. The proposed approach is based on adaptive Laplacian of Gaussian (LoG) filtering with local extrema detection using Features from Accelerated Segment Test (FAST) algorithm classified by a Convolutional Neural Network (CNN). The recognition rate of our algorithm was verified on real-life data.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 2; 303-308
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ICSP Programmer controlled with real-time operation system from PC parallel port
Programator ICSP sterowany przez system czasu rzeczywistego z równoległego portu komputera PC
Autorzy:
Widlok, M.
Powiązania:
https://bibliotekanauki.pl/articles/320189.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
programator ICSP
czas rzeczywisty
sterownik programowy
QNX
ICSP programmer
real-time
software driver
Opis:
Many of new programmable ICs like micro-controllers, PLDs and other devices feature some kind of ICSP (In Circuit Serial Programming) standard. Such devices can be programmed, reprogrammed or checked while soldered in the application circuit, using only a few lines and a special connector. This technology is very useful for the designer, however each manufacturer uses it 's own ICSP standard and dedicated programming device. This means that sometimes even a single application need a few different programmers and connectors. To overcome this problems a single very universal ICSP programmer was build. The article presents software driver and hardware implementation of the proposed programmer. To reduce design time very simple hardware was chosen - programmer does not have any "build in" intelligence and places all control tasks on the PC and software. Block schematic and a description of the modules and their connections is presented. To enable fast data transmission rate and provide good time resolution a hard real-time operation systems is needed. The software driver is written under QNX - very fast, reliable and well known OS. Description and general algorithm of the software driver and library is given. While ICSP programming is the main task, programmer also can be used as a digital I/O device for a PC. During about 2 years of use many communication protocols was implemented, not only for ICSP programming but also for debugging, control or testing of other applications. Concurrently author is working on RTAI Linux driver for the programmer to enable using it under that platform.
Wiele nowych programowalnych układów scalonych jak mikrokontrolery, układy PLD i inne posiada mechanizm ICSP (In Circuit Serial Programming - programowanie szeregowe wewnątrz układu). Układy te mogą być programowane i testowane, gdy już są wlutowane w docelowy obwód. Przeważnie potrzeba do tego kilku linii i specjalnej wtyczki. Ta technologia jest bardzo użyteczna dla projektanta, ale każdy producent posiada swój standard ICSP i dedykowany programator. To oznacza, że niekiedy nawet pojedyncza aplikacja wymaga kilku różnych programatorów i łączówek. Aby temu zaradzić, zaprojektowany i zbudowany został uniwersalny programator ICSP. W artykule przedstawiono programowy sterownik i sprzętowy układ programatora. Aby skrócić czas projektowania urządzenia, zdecydowano się na prosty układ sprzętowy - programator nie posiada własnej ,,inteligencji", a wszystkie zadania sterowania muszą być zrealizowane przez program. Został przedstawiony schemat blokowy i opis wszystkich bloków oraz ich połączeń. Aby umożliwić odpowiednio szybką transmisję danych i dobrą rozdzielczość czasową, wymagany jest system operacyjny czasu rzeczywistego. Sterownik został napisany pod QNX - bardzo szybki, pewny i znany system operacyjny. W artykule zostały zamieszczony opis i algorytmy działania sterownika oraz biblioteki funkcji użytkownika. Mimo iż programowanie ICSP było głównym zadaniem, programator może również zostać użyty jako cyfrowe urządzenie wejścia/wyjścia dla komputera PC. Przez prawie dwa lata użytkowania wiele protokołów komunikacji zostało zaimplementowanych nie tylko dla programowania ICSP, ale też dla testowania i kontroli różnych aplikacji. Obecnie autor pracuje nad sterownikiem do programatora dla systemu Linux.
Źródło:
Elektrotechnika i Elektronika; 2005, 24, 1; 106-112
1640-7202
Pojawia się w:
Elektrotechnika i Elektronika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Canny edge detection based real-time intelligent parking management system
Autorzy:
Trivedi, Janak
Devi, Mandalapu Sarada
Dhara, Dave
Powiązania:
https://bibliotekanauki.pl/articles/197804.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
Raspberry Pi
parking
edge detection
Python
real-time
sensors
parkowanie
wykrywanie krawędzi
Pyton
czas rzeczywisty
czujniki
Opis:
Real-time traffic monitoring and parking are very important aspects for a better social and economic system. Python-based Intelligent Parking Management System (IPMS) module using a USB camera and a canny edge detection method was developed. The current situation of real-time parking slot was simultaneously checked, both online and via a mobile application, with a message of Parking “Available” or “Not available” for 10 parking slots. In addition, at the time entering in parking module, gate open and at the time of exit parking module, the gate closes automatically using servomotor and sensors. Results are displayed in figures with the proposed method flow chart.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2020, 106; 197-208
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time positioning of equipment and material tracking of waste streams in surface coal mining – a case study
Autorzy:
Vrublová, Dana
Kapica, Roman
Smelik, Stanislav
Smeliková, Markéta
Powiązania:
https://bibliotekanauki.pl/articles/1853868.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
geologia
koparka kołowa
górnictwo odkrywkowe
bucket wheel excavator
geology
GNSS
digital terrain model
opencast mining
real-time
Opis:
The primary objective of the case study is to improve monitoring, controlling, planning and managing the extraction processes in surface lignite mining. Under the North Bohemian Lignite Basin (also Most Basin) conditions and the Sokolov Basin, wheeled excavators are deployed as the main technology for extracting coal and overlying rock. Their real-time spatial position can be tracked based on data from GNSS technology, inclinometers, and incremental rotary encoders. The measured data is sent to a remote server and stored in the database. It also serves to calculate volumes of extracted masses. Volume calculation, space position visualisation, and wheel boom movements are performed in KVASoftware. It is a program designed for modelling and designing quarries. Knowing the position of the wheel against the digital terrain (quarry), the model is essential for the implementation of many risk-elimination applications, namely with respect to the geological conditions, occupational safety, observance of the profile grade line, the area of extraction, qualitative parameters of the raw material, etc. The mathematical model of backfilling extracted materials is also an integral part of the above-mentioned system.
Źródło:
Archives of Mining Sciences; 2021, 66, 2; 249-264
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time stability of computer generated control in real-time
Powtarzalność czasowa sterowania komputerowego w czasie rzeczywistym
Autorzy:
Zwonarz, W.
Powiązania:
https://bibliotekanauki.pl/articles/282130.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
real-time
control
PD
Windows
jitter
neural network
Stanford arm
czas rzeczywisty
sterowanie
ramię stanfordzkie
sieć neuralna
Opis:
This paper is devoted to analyze time stability of robot arm controller. Controller is implemented on PC platform with Windows XP and Matlab/Simulink environment with additional toolbox RT-CON. Described robot is 3 DOF Stanford Arm. It is powered with high torque, gearless electrical engines. The analyze of jitter effect influence on robot period moves was made. Experiment was made with PD and PD extended by neural network controllers. During experiment the test of influence of stressed system on control generation was made.
W pracy przedstawiono analizę zachowania czasowych reżimów manipulatora sterowanego z poziomu komputera klasy PC. Komputer zarządzany jest przez system operacyjny Windows XP, wzbogacony o pakiet obliczeniowy Matlab/Simulink z zainstalowanym przybornikiem RT-CON. Badany manipulator to ramię stanfordzkie o trzech stopniach swobody, napędzane bezprzekładniowymi silnikami o wysokich momentach obrotowych. Przeprowadzono analizę wpływu zjawiska jitteru na zachowanie przez manipulator powtarzalności wymuszeń okresowych. Eksperyment przeprowadzono dla sterowania generowanego przez regulatory PD oraz PD wzbogacony o zmodyfikowaną siecią neuronową. Badano również zachowanie systemu obciążonego dodatkowymi zadaniami.
Źródło:
Automatyka / Automatics; 2013, 17, 2; 271-277
1429-3447
2353-0952
Pojawia się w:
Automatyka / Automatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time data acquisition based on common use interfaces at Matlab and embedded system
Autorzy:
Sieczkowski, K.
Sondej, T.
Powiązania:
https://bibliotekanauki.pl/articles/397757.pdf
Data publikacji:
2016
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
data acquisition
real-time
Matlab
serial communication
data processing
akwizycja danych
czas rzeczywisty
komunikacja szeregowa
przetwarzanie danych
Opis:
The article presents the tests of method for real-time data acquisition from embedded systems using Matlab software. Data transmission is performed using several common use interfaces: UART/USB, Ethernet, Bluetooth and WiFi. The article includes a description of a protocol, measuring station based on two types of embedded system, implementing the proposed protocol, as well as a description of the algorithm of test programs. Experimental studies were performed using a STM32F4 microcontroller and Raspberry PI-3 single-board computer. Executed tests related: (1) the average transmission time, (2) the effective throughput of a full cycle of data exchange, (3), the required working time of Matlab to handle the transmission, and (4) the stability of the program timer used for periodic data transmission calls. Experimental studies have shown that it is possible efficient data exchange between the embedded system and Matlab while maintaining the real-time requirements.
Źródło:
International Journal of Microelectronics and Computer Science; 2016, 7, 3; 100-108
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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