Wyniki wyszukiwania - Biblioteka Nauki

1

System telenawigacji dla osoby niewidomej

100%

Strumiłło P. , Barański P. , Polańczyk M.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2011

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tom nr 8-9

730-732

EN

An electronic travel aid for the blind is presented in the paper. The latter functionality, remote assistance, let a blind traveller contact an operator at a distant location in case of lost bearings. The operator can guide the blind traveller along a path to a given destination or guide him back on the correct route if required. The presented prototype is under development, however, initial trials have been already conducted.

2

Zastosowanie czujników inercyjnych i metody Monte Carlo do korekcji odczytów GPS w terenie miejskim

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Barański R. , Polańczyk M. , Strumiłło R.

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2010

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tom Vol. 51, nr 10

115-118

PL

W artykule omówiono zastosowanie symulacyjnej metody Monte Carlo do poprawy dokładności odczytów GPS (ang. Global Positioning System) w terenie miejskim. Zaprojektowany układ elektroniczny jest elementem systemu do nawigacji pieszej osób niewidomych. W terenie miejskim, na skutek odbić i wielodrogowości sygnałów od satelitów, odczyty GPS są obarczone znacznym błędem dochodzącym do kilkudziesięciu metrów. Jednoczesne odczyty z akcelerometru oraz żyroskopu służą do pomiaru względnego przemieszczenia, a następnie są porównywane z odczytami GPS. Algorytm symulacji wykorzystujący metodę Monte Carlo, służy do wyznaczenia najbardziej prawdopodobnego położenia geograficznego. Zastosowany układ umożliwia nawet kilkukrotne zmniejszenie błędu wyznaczanego położenia geograficznego.

EN

The article presents an application of recursive Monte Carlo method for correcting GPS readouts in an urban environment. The prototype was designed with a view of a pedestrian navigation device for the blind. GPS readouts are at times very inaccurate in an urban environment (reaching several dozens of meters) due to multipath propagation and reflections from buildings, The device houses an accelerometer and gyroscope for estimating the relative motion of the device. This relative displacement is correlated with GPS readouts. An algorithm based on the Monte Carlo simulation is used for assessing the most probable geographical location of the user. From the urban test of the method we conclude that the pro-posed dead reckoning solution improves on GPS receiver readouts by several times.

3

Nakłady ponoszone na zbiór i zakiszanie ziarna kukurydzy w worku foliowym

100%

Gach S. , Korpysz K. , Polańczyk M.

Journal of Research and Applications in Agricultural Engineering

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2011

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tom Vol. 56, nr 2

44-48

PL

W pracy została dokonana analiza technologii zbioru i zakiszania ziarna kukurydzy w worku foliowym. Całkowite koszty jednostkowe zbioru i konserwacji ziarna kukurydzy wyniosły 142,1 złźt-1s.m. W strukturze kosztów z uwzględnieniem maszyn, paliwa, pracochłonności i materiałów pomocniczych największy udział mają koszty maszyn i urządzeń wynoszące 92,2 złźt-1s.m., a następnie koszty paliwa 21,4 złźt-1s.m. oraz koszty materiałów pomocniczych 20,4 złźt-1s.m.

EN

The aim of this paper was to analyze the harvest technology and ensiling corn grain in a plastic bag. Total unitary costs of harvest and preservation of corn amounted to 142,1 PLNźt-1D.M. The largest share of the cost including machinery, fuel, labor input and support materials belonged to machinery and equipment costs (92,2 PLNźt-1D.M.) and next position belongs to fuel costs 21,4 (PLNźt-1D.M.) and support materials 20,4 (PLNźt-1D.M).

4

Fusion of data from inertial sensors, raster maps and GPS for estimation of pedestrian geographic location in urban terrain

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Barański P. , Polańczyk M. , Strumiłło P.

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tom Vol. 18, nr 1

145-157

EN

An electronic system and an algorithm for estimating pedestrian geographic location in urban terrain is reported in the paper. Different sources of kinematic and positioning data are acquired (i.e.: accelerometer, gyroscope, GPS receiver, raster maps of terrain) and jointly processed by a Monte-Carlo simulation algorithm based on the particle filtering scheme. These data are processed and fused to estimate the most probable geographical location of the user. A prototype system was designed, built and tested with a view to aiding blind pedestrians. It was shown in the conducted field trials that the method yields superior results to sole GPS readouts. Moreover, the estimated location of the user can be effectively sustained when GPS fixes are not available (e.g. tunnels).

5

Obstacle Avoidance Procedure and Lee Algorithm Based Path Replanner for Autonomous Mobile Platforms

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Polańczyk M. , Strzelecki M. , Ślot K.

International Journal of Electronics and Telecommunications

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2013

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tom Vol. 59, No. 1

85-91

EN

The paper proposes solution for two important issues connected to navigation of independent mobile platforms in an unknown environment. First issue relates to obstacle map, estimated based on stereovision images. It provides a basis for further platform path-planning. The main problem that has to be solved in obstacle map derivation is elimination of artifacts resulting from depth estimation. Thus a two-step artifact filtering procedure is proposed, which exploits both within-frame spatial correlations as well as temporal, between-frame correlations to do this task. Second procedure, based on well-known Lees algorithm is designed for obtaining vehicle collisionless path. Such routes need to be updated on-the-fly to take into account moving obstacles or newly detected objects. The main idea of the proposed approach is to identify regions where environment has changed and to execute a procedure of selective path updates. As a result, an optimal path can be derived at a computational expense comparable to the heuristic Lifelong A* search. Experiment results demonstrate efficiency of the two discussed approaches for platform operation control in real environments, where both static and moving obstacles are present.