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Molecular and Quantum Acoustics
2006 Vol. 27 233-238
EN Results of the calorimetric measurements, in the range from 70 kHz up to 1.7 MHz, confirmed the suitability of the use of the ferrofluid studied in magnetic fluid hyperthermia, especially in the frequency range from 600 do 800 kHz. The H2 - law type dependence of the specific absorption rate on the [...]
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Elektronika : konstrukcje, technologie, zastosowania
PL W artykule opisano algorytm nawigacji inercjalnej, który po uzupełnieniu o metodę ZUPT, może być wykorzystany w nawigacji personalnej. Przedstawiono składniki systemu oraz wyniki wstępnych badań eksperymentalnych.
EN The paper describes inertial navigation algorithm, which, after the addition of ZUPT method, can be used in personal navigation. Components of the system and preliminary results are presented.
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Molecular and Quantum Acoustics
2007 Vol. 28 229-239
EN A calorimetric study of the magnetic fluid APG-832 subjected to an alternating magnetic field has been performed. The results have permitted a determination of the specific absorption rat, expressed per the mass unit of the ferrimagnetic contained in the ferrofluid studied. In order to determine the[...]
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Molecular and Quantum Acoustics
2004 Vol. 25 115-120
EN Static magnetic properties of magnetic fluid APG 513A have been measured. The differential magnetic susceptibility was measured as a function of an external magnetic field in the range of 1-200 kA/m, parallel to the direction of the field. The data were analysed using the Langevin equation and takin[...]
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Molecular and Quantum Acoustics
2003 Vol. 24 31-40
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Molecular and Quantum Acoustics
2003 Vol. 24 41-46
EN The measurements of ultrasonic attenuation in a water-based magnetic fluid EMG-605 as a function of frequency are presented. Experimental results are analyzed using two-phase model of magnetic liquid. A good agreement between experimental data and the predictions of theoretical model was obtained.
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Molecular and Quantum Acoustics
1999 Vol. 20 67-80
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Molecular and Quantum Acoustics
1998 Vol. 19 261-269
EN The influence of magnetic field on the acoustic and magnetic properties of magnetic liquids is discussed. By fitting the curve of Taketomi's theory to the experimental data of the anisotropy of ultrasonic attenuation, the values of quantities describing the structure of magnetic liquid have been det[...]
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Molecular and Quantum Acoustics
2000 Vol. 21 251-259
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Molecular and Quantum Acoustics
2001 Vol. 22 221-230
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Molecular and Quantum Acoustics
2001 Vol. 22 231-238
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Archives of Acoustics
EN In this paper are presented experimental results of changes of the ultrasonic wave absorption coefficient as the function of external magnetic field intensity, for different rates of magnetic field changes in a polydispersive magnetic liquid EMG-605 based on water. Measurements were performed for tw[...]
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Archives of Acoustics
EN An external magnetic field applied to a magnetic fluid gives rise to the appearance of spherical and chain-like clusters. The present work is based on an acoustic method permitting the determination of the presence and size of the clusters by resonance absorption of an ultrasonic wave in a magnetic[...]
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Postępy Fizyki
2013 T. 64, z. 3-6 134--138
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Annual of Navigation
2016 No. 23 39--52
PL Lotnicze zobrazowania terenu realizowane za pomocą radaru z syntetyczną aperturą pozwalają na uzyskanie wysokiej rozróżnialności porównywalnej z rozróżnialnością metod optycznych, mając jednocześnie nad nimi przewagę w postaci niezależności obserwacji od warunków pogodowych czy pory dnia. Proces ana[...]
EN Synthetic aperture radars (SAR) allow to obtain high resolution terrain images comparable with the resolution of optical methods. Radar imaging is independent on the weather conditions and the daylight. The process of analysis of the SAR images consists primarily of identifying of interesting object[...]
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Metrology and Measurement Systems
2016 Vol. 23, nr 3 383--391
EN The paper presents a method of calculation of position deviations from a theoretical, nominally rectilinear trajectory for a SAR imaging system installed on board of UAV. The UAV on-board system consists of a radar sensor, an antenna system, a SAR processor and a navigation system. The main task of [...]
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Przegląd Elektrotechniczny
2016 R. 92, nr 1 58--61
PL W pracy przedstawiono koncepcję systemu nawigacji personalnej. System składa się z jednostki inercjalnej (triada przyspieszeniomierzy, triada giroskopów), trójosiowego magnetometru oraz odbiornika sygnału GPS. Procesor nawigacyjny realizuje obliczenia związane z algorytmem nawigacji inercjalnej. Dan[...]
EN The paper presents a concept of pedestrian navigation system. The system consist of inertial measurement unit (three accelerometers and gyroscopes), three-axis magnetometer and GPS receiver. Navigation processor performs Strapdown Inertial Navigation System calculations (SINS). Data from SINS and GN[...]
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Przegląd Elektrotechniczny
2016 R. 92, nr 1 62--67
PL Artykuł porusza problem badania właściwości błędów losowych czujników inercjalnych. Wykorzystana w badaniach metoda wariancji Allana umożliwia określenie ich wartości na podstawie przebiegu czasowego sygnałów. Analizie poddano giroskopy i przyśpieszeniomierze dwóch czujników wykonanych w różnych tec[...]
EN This paper presents application of Allan Variance method for analysis of inertial sensors random errors. The research is based on data from two inertial sensors made in different technologies. Finally, the error propagation model of two-dimensional Inertial Navigation System is described.
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Molecular and Quantum Acoustics
2002 Vol. 23 193-199
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