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Search results for: FOUNDATION PLATE MEASUREMENTS
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Verification of multiband system for non-contact emissivity measurements
PublicationW pracy przeprowadzono weryfikację wielopasmowej pasywnej metody pomiaru emisyjności obiektu na drodze eksperymentalnej. W oparciu o zrealizowane stanowisko pomiarowe dokonano pomiarów emisyjności wybranych obiektów. Uzyskano dobrą zgodność wyników pomiarów z wynikami wcześniejszej komputerowej analizy systemu. Potwierdziło to przydatność wielopasmowej metody do pomiaru emisyjności w warunkach roboczych.
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Digital measurements in monitoring of position and velocity of machine subassambly
PublicationReferat dotyczy zastosowania enkoderów z sygnałem wyjściowym kwadraturowym współdziałających z odpowiednim systemem DAQ do monitorowania przebiegu ruchu podzespołów maszyn technologicznych. Przedyskutowano podstawowe zasady konstrukcji układów do cyfrowych pomiarów prędkości i przemieszczeń.Porównano wady, zalety i ograniczenia rozdzielczości pomiaru prędkości dwoma znanymi sposobami. Omówiono własne rozwiązania zastosowane w układach...
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Experimental measurements of friction forces on the tissue in probabilistic view
PublicationNiniejsza praca jest poświęcona wyznaczaniu wartości sił tarcia wywołanych podczas hydrodynamicznego przepływu lepkosprężystej cieczy odżywczej na powierzchniach hodowanych chondrocytów w bioreaktorze. Badania realizuje się w nano skali przy wykorzystaniu mikroskopu sił atomowych. Chondrocyty hodujemy w celu naprawy uszkodzonych chrząstek stawowych kolana człowieka.
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Reassesing whole tooth electrical impedance spectroscopy measurements
PublicationW pracy dokonano krytycznej oceny wyników wcześniejszych badań spektorskopowych zębów przeprowadzonych w innych ośrodkach i porównano je z własnymi. Wskazano na trudności występujące podczas pomiarów.
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Impulse Measurements of Tower Earthings of Overhead Transmission Lines
PublicationPrzepisy wymagają okresowego badania uziemień słupów elektroenergetycznych linii przesyłowych. pomiary takie metodami klasycznymi niskiej częstotliwości wymagają odłączania uziomów od konstrukcji słupa, co wiąże się z wyłączaniem linii. wykorzstanie metody udarowej do oceny uziemień nie wymaga odłączania uziomów i może byc przeprowadzane podczas pracy linii.
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Determining the conditions for temperature measurements during flat lapping
PublicationPrzedstawiono pomiary temperatury układu wykonawczego docierarki jednotarczowej ABRALAP 380. Badano wpływ liczby stosowanych pierścieni prowadzących przy docieraniu elementów ceramicznych mikroziarnami węglika krzemu. Analizowano przyrost temperatury układu w czasie do trzech godzin. W badaniach zastosowano kamerę termowizyjną V-20II firmy VIGO System S.A.
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Comment on "Measurements without probabilities in the final state proposal"
PublicationThe final state proposal [G.T. Horowitz and J.M. Maldacena, J. High Energy Phys.2004(2),8 (2004)] is an attempt to relax the apparent tension betweenstring theory and semiclassicalarguments regarding the unitarity of black hole evaporation. The authors of [R. Bousso and D.Stanford, Phys. Rev. D89, 044038 (2014)] analyze thought experiments where an infalling observerfirst verifies the entanglement between early and late Hawking...
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Capacitively coupled ECG measurements - a CMRR circuit improvement
PublicationA typical galvanic-connected electrocardiogram (ECG) measurement system utilizes two signal’s electrodes and a third one in driven-right-leg (DRL) circuit for improving a common-mode rejection ratio(CMRR) of the acquisition system. In capacitive-coupled ECG similar techniques are used, however it is expected, that the utilized DRL subsystem is formed using a capacitive coupling approach, too. An improvement of the acquisition system...
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On the use of a charge balancing method for low energy measurements
PublicationThe paper presents the method for the estimation of the energy consumption of the low-power microcontroller-based devices. Due to high dynamics of the changes of the supply current of the tested devices during the operational cycle, the consumed energy estimation is not easy. In order to avoid disadvantages of known methods, the charge balancing method was employed similarly like in some types of A/D converters.
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Accuracy of a low-cost autonomous hexacopter platforms navigation module for a photogrammetric and environmental measurements
PublicationA photogrammetry and environmental measurements from an unmanned aerial vehicle (UAV) are a low-cost alternative for a traditional aerial photogrammetry. A commercial off-the-shelf products (COTS) offers a variety of cheap components that a suitable to be used on board a UAV. In this paper a low-cost navigation module based on Ublox NEO-M8N GPS and Pixhawk flight controller have been described, as a main extrinsic parameters source...
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The results of the nitrogen adsorption/desorption measurements of CPMD and CPMH
Open Research DataThe results of the nitrogen adsorption/desorption measurements of CPMD and CPMH. The adsorption/desorption isothermswere carried out at 77 K using a Quantachrome Autosorb-1C-MS instrument. Sample abbreviations (CPMD, CPMH) are in agreement with the markings used in the linked publication.
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Results of electrical voltage measurements in reactors - part 1
Open Research DataResults of electric voltage measurements in six reactors using various plantings. These are the results of the project: Integrated approach 3M (Macrophytes-Microbiome-Modelling) to elucidate mechanisms of bioenergy production and micropollutants transformation in Floating Treatment Wetlands combined with Microbial Fuel Cells.
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Application of adjusted subpixel method (ASM) in HRCT measurements of the bronchi in bronchial asthma patients and healthy individuals
PublicationBackground: Recently, we described a model system which included corrections of high-resolution computedtomography (HRCT) bronchial measurements based on the adjusted subpixel method (ASM).Objective: To verify the clinical application of ASM by comparing bronchial measurements obtained bymeans of the traditional eye-driven method, subpixel method alone and ASM in a group comprised ofbronchial asthma patients and healthy individuals.Methods:...
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Stationary underwater channel experiment: Acoustic measurements and characteristics in the Bornholm area for model validations
PublicationThe underwater acoustical channel is time-variant, and even on small time scales there is often existing no ‘acoustical frozen ocean’. Popular is the use of WSSUS-channel transmission modeling (Wide-Sense Stationary Uncorrelated Scattering) for the stochastic description of bandpass signals in GSM mobile phones with moving participants; since this results in a halved number of model parameters. For underwater sound applications...
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Temperature influence on tyre/road noise on poroelastic road surface based on laboratory measurements
PublicationThe temperature effect on measured tyre/road noise is very important phenomena as it may lead to significant errors in measurement results due to substantial influence of this parameter on the obtained values. It depends mainly on the particular tyre-road combination. It is different for dense and porous as well as for bituminous and cement concrete pavements. It differs also depending on tested tyre. The correction procedure for...
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Evaluation of time and space distribution of magnetic flux density in a steel plate magnetized by a C-core
PublicationBadano wpływ częstości magnesowania płyty stalowej na rozkład przestrzenny indukcji magnetycznej wewnątrz tej płyty. Rozkład ten oceniano na podstawie pomiaru natężenia emisji magnetoakustycznej a także rozkładu na powierzchni płyty natężenia efektu Barkhausena. Wyniki dyskutowane są ilościowo i porównane z wynikami modelowania metodą elementów skończonych, w której uwzględniono efekt powstawania prądów wirowych.
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Influence of cathodic-protection-induced hydrogenation on mechanical properties of two ship hull plate steels
PublicationPrzedstawiono wyniki próby rozciągania i udarowej Charpy V dla stali zwykłej wytrzymałości (kategorii A) i podwyższonej wytrzymałości (kat. AH32) zarówno w stanie dostawy jak i po nawodorowaniu (protektor Zn w słonej wodzie). Nawodorowanie obydwu stali zwiększyło nieco granicę plastyczności (Re) i wydłużenie (A), nie zmieniając (atal A) lub nieco zmniejszając przewężenie (Z). Wpływ nawodorowania na udarność był ewidentnie pozytywny...
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Modelowanie asymetrycznego procesu walcowania blach bimetalowych = The modeling of asymetrical rolling process of bimetallic plate
PublicationW pracy rozważano problem płynięcia plastycznego bimetalowego pasma podczas asymetrycznego procesu walcowania blach bimetalowych. Asymetrię procesu uzyskano w wyniku wprowadzenia różnic w wartościach sił tarcia na powierzchniach styku pasma z poszczególnymi walcami.
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Electrohydrodynamic flow and particle collection efficiency in a one-sided spike-plate type electrostatic precipitator
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Induction Generator with Direct Control and a Limited Number of Measurements on the Side of the Converter Connected to the Power Grid
PublicationThe article presents an induction generator connected to the power grid using the AC/DC/AC converter and LCL coupling filter. Three-level inverters were used in the converter, both from the generator side and the power grid side. The algorithm realizing Pulse Width Modulation (PWM) in inverters has been simplified to the maximum. Control of the induction generator was based on the Direct Field-Oriented Control (DFOC) method. At...
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Tyre/road noise of passenger car tyres, including tyres for electric vehicles - road measurements
PublicationThe paper presents the results from CPX measurements of tyre/road noise performed for selected passenger car tyres, including the tyres especially designed for electric vehicles. The tyres have been measured when rolling on several typical road surfaces in Norway and in Poland. In addition, the tyres have been measured on some very low noise road surfaces, such as a the poroelastic road surface (PERS). The measurement results...
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XPS measurements of the iron elements covered by chromium
Open Research DataAnticorrosive coatings are an important issue in modern materials engineering. One of the most commonly used, for that coating materials, is chrome. Three metal elements were measured, named as Turcja, WB Tech and Nomet. Names were given according to producer of elements. XPS measurements of the Cr 2p region give an ansver concering on surface chemical...
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Instantaneous power signal measurements for bearing diagnostics
Open Research DataBearing diagnostics can be carried out based on the method, which relies on the measurement and analysis of the variability of the signal instantaneous power, defined as the product of instantaneous current and voltage power supplied to the engines. Bearing damage causes the appearance of deformations, which are in the form of additional harmonic components...
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Testing the Positioning Accuracy of GNSS Solutions during the Tramway Track Mobile Satellite Measurements in Diverse Urban Signal Reception Conditions
PublicationMobile Global Navigation Satellite System (GNSS) measurements carried out on the railway consist of using satellite navigation systems to determine the track geometry of a moving railway vehicle on a given route. Their purposes include diagnostics, stocktaking, and design work in railways. The greatest advantage of this method is the ability to perform measurements in a unified and coherent spatial reference system, which...
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Measurements of no-load and short-circuit parameters of power transformers with taps
Open Research Data1) The Laboratory LINTE^2 is a large research infrastructure operated by the Faculty of Electrical and Control Engineering at Gdańsk University of Technology, to be found in Gdańsk, Poland (54.3690 N, 18.6130 E).
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Computer-aided analysis of signals from a low-coherence Fabry-Perot interferometer used for measurements of biological samples
PublicationThe aim of the study was to develop an automated computer-aided system for analysis of spectrograms obtained from measurements of biological samples performed with a low-coherence Fabry-Pérot interferometer. Information necessary to determine dispersion characteristics of measured materials can be calculated from the positions of the maxima and minima that are present in their spectra. The main challenge faced during the development...
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Analysis of the Dynamic Height Distribution at the Estuary of the Odra River Based on Gravimetric Measurements Acquired with the Use of a Light Survey Boat—A Case Study
PublicationLaCoste) for determining the dynamic height along the Odra River, in northwest Poland. The gravity measurement campaign described in this article was conducted on a small, hybrid-powered survey vessel (overall length: 9.5 m). We discuss a method for processing the results of gravimetric measurements performed on a mobile platform affected by strong external disturbances. Because measurement noise in most cases consists of signals...
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Evaluation of the Possibility of Identifying a Complex Polygonal Tram Track Layout Using Multiple Satellite Measurements
PublicationWe present the main assumptions about the algorithmization of the analysis of measurement data recorded in mobile satellite measurements. The research team from the Gda´nsk University of Technology and the Maritime University in Gdynia, as part of a research project conducted in cooperation with PKP PLK (Polish Railway Infrastructure Manager), developed algorithms supporting the identification and assessment of track axis layout....
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Evaluation of the Possibility of Identifying a Complex Polygonal Tram Track Layout Using Multiple Satellite Measurements
PublicationWe present the main assumptions about the algorithmization of the analysis of measurement data recorded in mobile satellite measurements. The research team from the Gda´nsk University of Technology and the Maritime University in Gdynia, as part of a research project conducted in cooperation with PKP PLK (Polish Railway Infrastructure Manager), developed algorithms supporting the identification and assessment of track axis layout....
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Isolation of the relative decrease in magnetic permeability contribution to reluctance of an open magnetic circuit based on stray field measurements
PublicationThe goal of the study was to evaluate a relative decrease in magnetic permeability in open magnetic circuits based on stray magnetic field measurements. The boundary element method was used to simulate magnetic circuits with variable geometry and variable magnetic permeability. The simulated magnetic circuits were rectangular or bone-shaped flat samples. Reluctance was increased in the middle of the samples resulting in leakage...
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Au nanostructures coated with a ultrathin film of Al2O3 - measurements and FDTD simulations
Open Research DataGold plasmonic platforms have been coated with an ultra-thin films of aluminium oxide. Optical measurements, showing the influence of the thickness of Al2O3 on plasmon resonance position. The observed red-shift of the resonance location with the increase of the thickness of the Al2O3 film, can be explained by the change in the dielectric function of...
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The Concept of Accuracy Analysis of the Vertical Displacements Gained from the Hydrostatic Levelling Systems’ Measurements
PublicationAbstract: Nowadays, hydrostatic levelling is a widely used method for the vertical displacements’ determinations of objects such as bridges, viaducts, wharfs, tunnels, high buildings, historical buildings, special engineering objects (e.g., synchrotron), sports and entertainment halls. The measurements’ sensors implemented in the hydrostatic levelling systems (HLSs) consist of the reference sensor (RS) and sensors located on the...
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Correction of far-field measurements obtained in non-anechoic test site
Open Research DataThe dataset contains raw and processed measurements of radiation pattern characteristics performed in non-anechoic regime for two geometrically small antenna structures: a spline-parameterized Vivaldi structure and a compact spline-based monopole. The responses have been obtained at the selected frequencies of interest as a function of mentioned structures...
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Temperature Measurements at Tyre Tread Rubber on Sandpaper Oscillatory Sliding Contacts Using Acicular Grindable Thermocouples
PublicationThe tribological performance of tyre–road contacts depends crucially on the contact temperature. This study investigates the reliability and accuracy of acicular grindable thermocouples possessing an original needle-shaped wearable part as applied to measuring temperature at the oscillatory sliding contact between a rubber tyre tread sample and a sandpaper. A linear oscillatory tribometer is used to imitate the sliding phase of...
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Displacements of bones during bending test of first metatarsophalangeal joint after arthrodesis with medially or dorsally positioned locking plate and lag screw.
Open Research DataThe Dataset contains the values of displacements of bone control points during the bending test of first metatarsophalangeal (MTP1) joint specimens after arthrodesis.
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Inhomogeneity of low-noise wearing courses evaluated by tire/road noise measurements using the close-proximity method
PublicationPerforming numerous analyses of tire/road noise measurements on low-noise pavements during the last several years, the authors observed significant inhomogeneity of the wearing course in numerous cases, while similar problems were almost non-existent when dense pavements were measured. Three main causes of low-noise pavement inhomogeneity can be defined. The first one is imperfections in the technology used for asphalt mix production...
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Scattering of electrons by a 1,2-butadiene (C4H6) molecule: measurements and calculations
PublicationWe present the results of experimental and theoretical study on electron collisions with a 1,2-butadiene (H2C=C=CHCH3) molecule. Absolute grand-total cross sections (TCSs) were measured using a linear electron-transmission method for collision energies in the 0.5–300 eV range. Two distinct features in the TCS energy curve were detected: a narrow peak located at 2.3 eV and a broad enhancement centered around 9 eV. We attributed...
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Measurements of the optical and thermal properties of the 2D black phosphorus coating
PublicationBlack phosphorus is a 2D material, which properties are still being discovered. In this paper, the sensitivity to the temperature of a few-layer black phosphorus coating deposited, on the surface of a microsphere-based fiber-optic sensor, by a dip-coating method is presented. The coating was investigated after 2, 3, and 5 deposition cycles and during temperature growth from 50 °C to 300 °C in an interferometric setup. The intensity...
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Performance of acicular grindable thermocouples for temperature measurements at sliding contacts
PublicationThe present study investigates the performance of acicular grindable thermocouples based on a constantan wire / steel hollow cylinder construction. The experiments showed that the measuring junction electrical resistance, temperature–voltage characteristic, measuring junction rise time and signal noise standard deviation of the acicular thermocouples are comparable to those of conventional J-type thermocouples with bare wire diameter...
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DISPLACEMENT MEASUREMENTS DURING LOAD TESTING OF THE RAILWAY ARCH BRIDGE
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Optimization of impedance measurements using ‘chirp’ type perturbation signal
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The application of impedance measurements for the determination of the probability of the course of corrosion processes
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Corrosion rate measurements by non-linear electrochemical impedance spectroscopy
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Electromagnetic Field Measurements of Bow Thruster Drive with Frequency Converter
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Radiated emissions measurements of a portable power bank in a GTEM cell
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Correction of determined coordinates of railway tracks in mobile satellite measurements
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Analysis of Turbulent Flow Measurements in a Flume with Induced Upward Seepage
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On the power systems performance control starting from disturbances measurements
PublicationReferat przedstawia badanie działania układu sterowania w systemie elektroenergetycznym oparte na oszacowanie parametrów. Na podstawie pomiarów wykonanych w stanie zakłóconiowym, parametry te są oszacowane minimizując uchyb pomiędzy wartościami wielkości uzyskanych z pomiarów i wartościami wielkości wyjściowych modelu systemu elektroenergetycznego. W celu zmniejszenia tego uchybu, proponowano dwie metody: klasyczna oparta na czułości...
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Optical measurements for thin oil film investigation in rheometric processes.
PublicationPrzedmiotem badań jest pomiar parametrów cienkiej warstwy oleju silikonowego AK106, powstającej na ścianach dyszy w trakcie procesu reologicznego wyciskania do form past ceramicznych, przygotowywanych ze sproszkowanego tlenków wodorotlenków AlOOH oraz oleju AK106. Parametrami badanymi były: grubość warstwy oleju, charakterystyka reflektancyjna pasty oraz skład mieszaniny. Przedstawione zagadnienie ma istotne znaczenie dla rozwoju...
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Methods for displacement and rotation measurements of individual Taylor-Schneebeli grains.
PublicationW artykule przedtawiono autorską metodę pomiaru przemieszczeń oraz obrotów cząstek ośrodka analogowego Taylor-Schneebeli oraz propozycję interpretacji badań.