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Search results for: SOUND MEASUREMENT DEVICES
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Chapter 6 : Non-intrusive measurement techniques in bubble dynamics investigation
PublicationPrzedstawiono wyniki badań dynamiki pęcherzyków parowych i gazowych przy użyciu nieinwazyjnych metod optycznych i akustycznych.
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Installation of GNSS receivers on a mobile railway platform – methodology and measurement aspects
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Electrodes array for contactless ECG measurement of a bathing person - a sensitivity analysis
PublicationAn applicability of a remote (contactless) electrocardiogram (ECG) measurements in a bathtub is presented in the paper. Possibility of ECG measurements in shallowly filled tube with a water was examined. A bathing person was, both, sitting and lying during experiments performed. The problem became non-trivial when the bathing person was moving in reference to a fixed set of electrodes and located at the longer walls of the bathtub....
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Voltage Harmonic Distortion Measurement Issue in Smart-Grid Distribution System
PublicationThis paper presents the investigation results ofvoltage harmonic transfer accuracy problems through voltagetransformers which are widely used in power quality monitoringsystems in medium and high voltage grids. A simplified lumpedparameters circuit model of the voltage transformer is presentedand verified by simulation and experimental investigations. Anumber voltage transformers typically used in medium voltagegrid has been tested...
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2015. Motion analysis of a kitesurfer employing a vision-based measurement system
PublicationAbstract. Kitesurfing is a relatively new phenomenon with rising popularity worldwide – a recently developed extreme watersport considered a high-risk injury sport. It combines elements of several other sports, in particular, sailing, surfing, windsurfing, wakeboarding, and snowboarding. The main purpose of authors’ research in the present paper is to use a vision-based system for measuring a kitesurfer’s body movements in order...
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Polarization interferometer using a Liquid Crystalline Polymer waveplate for wavelength measurement
PublicationA two-beam polarization interferometer for measuring wavelength changes of a tunable semiconductor laser was designed, built and tested. This interferometer uses a λ/8 waveplate made from Liquid Crystalline Polymer in order to generate two output signals in quadrature. The λ/8 waveplate can be manufactured either on a beamsplitter face or on the mirror surface, reducing the cost and complexity of the optomechnical assembly. Experiment...
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The influence of sampling parameters on accuracy of capacitance measurement in the method based on DSP.
PublicationW artykule przedstawiono metodę pomiaru parametrów impedancyjnych bazującą na próbkowaniu sygnałów pomiarowych i DSP. Przeanalizowano wpływ głównych źródeł niepewności i błędów na dokładność pomiaru pojemności. Zawarto analizę dla następujących parametrów: niesynchroniczne próbkowanie sygnałów pomiarowych (napięciowego i prądowego), rozdzielczość przetwornika a/c i ilość zbieranych próbek. Załączono wyniki symulacji.
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Measurement of noise parameter set in the low frequency range: requirements and instrumentation.
PublicationOpisano dwa podstawowe szumowe modele metrologiczne czwórnika: ze źródłami szumów odniesionymi do wejścia i ze zwarciowymi prądami szumów. Parametry szumowe opisujące modele zawierające korelację pomiędzy prądami i/lub napięciami są mierzone przy zastosowaniu metod bezpośrednich i pośrednich. Przedstawiono kilka technik redukcji szumów własnych systemu pomiarowego. Szerzej zaprezentowano dwukanałowy system do pomiaru szumów z komputerowym...
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Impedance spectroscopy by means of a digital storage oscilloscope based measurement system.
PublicationW pracy przedstawiono system pomiarowy służący do badań spektroskopowych. Został on zbudowany w oparciu o szerokopasmowy oscyloskop cyfrowy. Przeprowadzono analizę dokładności pomiarów oraz przedstawiono wyniki badań kalibracyjnych i przykładowych pomiarów parametrów materiałów biologicznych.
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Flow field around growing and rising vapour bubble by PIV measurement.
PublicationPrzedstawiono wyniki badania pól prędkości wokół wzrastających i unoszących się pęcherzyków parowych generowanych z pojedynczego centrum nukleacji. W badaniach zastosowano komercyjny układ Particle Image Velocimetry.
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Design and measurement of gyrator and isolator using ferrite coupled microstrip lines
PublicationW publikacji przeprowadzono badania struktur żyratora i izolatora zrealizowanych w technice sprzężonych ferrytowych linii mikropaskowych. Po raz pierwszy zaprezentowano wyniki pomiaru zrealizowanych struktur tego rodzaju. Uzyskane wyniki potwierdzają przewidziany uprzednio efekt zmian kierunków działania opisywanych elementów ze zmianą częstotliwości.
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Sounding Mechanism of a Flue Organ Pipe—A Multi-Sensor Measurement Approach
PublicationThis work presents an approach that integrates the results of measuring, analyzing, and modeling air flow phenomena driven by pressurized air in a flue organ pipe. The investigation concerns a Bourdon organ pipe. Measurements are performed in an anechoic chamber using the Cartesian robot equipped with a 3D acoustic vector sensor (AVS) that acquires both acoustic pressure and air particle velocity. Also, a high-speed camera is employed...
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Power and energy measurement problems in transmission line between Poland-Lithuania
PublicationThe paper discusses problem of power and energy metering in double circuit overhead transmission line. Considerations are based on example of transmission line connecting Polish substation Bis Elk and Lithuanian substation Alytus.
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Selection of measurement frequency in Mott-Schottky analysis of passive layer on nickel
PublicationPrzedstawiono zależności Mott'a - Schottky'ego dla różnych częstotliwości pomiarowych. Kształt uzyskanych zależności zależy od doboru tych częstotliwości. Związane jest to z tym, że stężenie defektów w warstwie pasywnej zależy od doboru częstotliwości. Metoda DEIS pozwala na uniknięcie tych niedogodności.
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IEEE Journal on Exploratory Solid-State Computational Devices and Circuits
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Uncertainty analysis of measuring system for instantaneous power research
PublicationThe paper presents a metrological analysis of the measurement system used for diagnosis of induction motor bearings, based on the analysis of the instantaneous power. This system was implemented as a set of devices with dedicated software installed on a PC. A number of measurements for uncertainty estimation was carried out. The results of the measurements are presented in the paper. The results of the aforementioned analysis helped...
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An interval estimator for chlorine monitoring in drinking water distribution systems under uncertain system dynamics, inputs and chlorine concentration measurement errors
PublicationThe design of an interval observer for estimation of unmeasured state variables with application to drinking water distribution systems is described. In particular, the design process of such an observer is considered for estimation of the water quality described by the concentration of free chlorine. The interval observer is derived to produce the robust interval bounds on the estimated water quality state variables. The stability...
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Effect of buffer layers on performance of organic photovoltaic devices based on copper phthalocyanine-perylene dye heterojunction
PublicationPraca przedstawia wyniki badań układu fotowoltaicznego złożonego z cienkich warstw organicznych tworzących złącze (CuPc i MePTCDI), elektrod (ITO i Ag) oraz z warstw buforowych (MoO3 przy ITO i BCP przy Ag).
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Real‐Time PPG Signal Conditioning with Long Short‐Term Memory (LSTM) Network for Wearable Devices
PublicationThis paper presents an algorithm for real‐time detection of the heart rate measured on a person’s wrist using a wearable device with a photoplethysmographic (PPG) sensor and accelerometer. The proposed algorithm consists of an appropriately trained LSTM network and the Time‐Domain Heart Rate (TDHR) algorithm for peak detection in the PPG waveform. The Long Short‐Term Memory (LSTM) network uses the signals from the accelerometer...
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Ability of paramedics to perform intraosseous access. A randomized cadaver study comparing EZ-IO® and NIO® devices
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All-fiber tunable devices based on high-index photonic crystal fibers filled with liquid crystals
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Assessing the Operation System of Fire Alarm Systems for Detection Line and Circuit Devices with Various Damage Intensities
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New devices to capture the temperature effect under dynamic compression and impact perforation of polymers, application to PMMA
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Formation of Highly Conductive Boron-Doped Diamond on TiO2 Nanotubes Composite for Supercapacitor or Energy Storage Devices
PublicationIn the present paper, we report the phenomena of the formation of the novel composite nanostructures based on TiO2 nanotubes (NTs) over-grown by thin boron-doped diamond (BDD) film produced in Microwave Plasma Enhanced Chemical Vapor Deposition (PE MWCVD). The TiO2 nanotube array overgrown by boron-doped diamond immersed in 0.1 M NaNO3 can deliver high specific capacitance of 7.46 mF cm−2. The composite electrodes were characterized...
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Mathematical Models of Control Systems of Angular Speed of Steam Turbines for Diagnostic Tests of Automatic and Mechatronic Devices
PublicationAccurate modeling of physical processes of many automatics and mechatronics systems is often necessity. In power system such a process is control of angular velocity of power objects during connection to operation in parallel. This process is extremely dynamic. For this reason response of control system depends from changes of many physical parameters (temperature, pressure and flow of the medium, etc.). Precision modeling influences...
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The Quantum Efficiency Roll-Off Effect in Near-Infrared Organic Electroluminescent Devices with Iridium Complexes Emitters
PublicationThe electroluminescence quantum efficiency roll-off in iridium(III)-based complexes, namely Ir(iqbt)2(dpm) and Ir(iqbt)3(iqbt=1 (benzo[b]thiophen-2-yl)-isoquinolinate, dpm=2,2,6,6-tetramethyl-3,5-heptanedionate) utilized as near-infrared emitters in organic light emitting diodes with remarkable external quantum efficiencies, up to circa 3%, 1.5% and 1%, are measured and analyzed. With a 5–6 weight % of emitters embedded...
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ECG measurement in the bathtub - conversation during measurement, electrodes on the sides of the bathtub, drl in water - women
Open Research DataThe measurement data shows the measurement of the ECG signal in water in the bathtub. The data includes the measurement time, the reference ECG signal from the chest, and the ECG signal measured by electrodes placed in the bathtub without contact with the human body. Using the presented data, it is possible to estimate the optimal arrangement of measuring...
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Understanding ion–ion and ion–solvent interactions in aqueous solutions of morpholinium ionic liquids with N-acetyl-L-alaninate anion through partial molar properties and molecular dynamics simulations
PublicationAmino acid ionic liquids (AAILs) provide a low toxicity, biodegradable alternative to conventional ionic liquids, while also maintaining solubility in water. Densities and sound velocities of aqueous solutions of four amino acid ionic liquids (AAILs), based on the N-alkyl-N-methylmorpholinium ([Mor1,R], R = 2, 3, 6, 8) cation and N-acetyl-L-alaninate ([N-Ac-L-Ala]) anion were measured at T = (293.15–313.15) K and at atmospheric...
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Journal of Food Measurement and Characterization
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TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
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Eine Eeue Technik zur Präzisen Rissfortschrittsmessung im DCB oder im Keilversuch = A novel technique for precise crack length measurement in the DCB or wedge test
PublicationDiverse methods have been tried to study crack length, most basic relying on direct, or microscopic, observation of the crack tip position. Optical correlation, both lasermoiré and speckle interferometry, a single strain gauge and displacement sensorshave also been employed. Crack length measurement is, however, delicate. We present a novel method making use of strain gauges attached to one of the adherends.
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Fundamentals of Machinery Operation and Power Engineering Devices, L, ENE, sem. 5, zima 2022/23 (PG_00042101)
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Fundamentals of Machinery Operation and Power Engineering Devices, W, PE, sem 05, zimowy 23/24 (PG_00042101)
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Fundamentals of Machinery Operation and Power Engineering Devices, L, ET, sem.5, zima 23/24 (PG_00042101)
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Janusz Smulko prof. dr hab. inż.
PeopleHe was born on April 25, 1964 in Kolno. He graduated in 1989 with honors from the Faculty of Electronics at Gdańsk University of Technology, specialising in measuring instruments. In 1989 he took second place in the Red Rose competition for the best student in the Pomerania Region. Since the beginning of his career ha has been associated with Gdańsk University of Technology: research assistant (1989-1996), Assistant Professor (1996-2012),...
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Induction Motor Multiscalar Model Based Sensorless Control Using Power Measurement
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Influence of the analyzing window on electrode impedance measurement by the continuous frequency scanning method
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Measurement invariance of the Belief in a Zero‐Sum Game scale across 36 countries
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<title>Modeling of noncontact temperature measurement system using multiwavelength pyrometry</title>
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Sweet Cherry Skin Colour Measurement as an Non-Destructive Indicator of Fruit Maturity
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Energy Recovery Analysis in A-Type Pressure Regulation and Measurement Stations in Istanbul, Esenyurt
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Measurement of ethylene production as a method for determining the optimum harvest date of ‘Jonagored’ apples
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Optical Fibre Control-Measurement Systems Of Compound HV/HP Electrical Equipment
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Calibration of the CMS drift tube chambers and measurement of the drift velocity with cosmic rays
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Low Frequency Noise Measurement of Reverse Polarized Silicon Carbide Schottky Diodes
PublicationW artykule przedstawiono wyniki pomiaró szumów cz. wstecznie spolaryzowanych diod Schottky'ego.
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Measurement of the earth fault loop impedance in a low voltage network with operating loads
PublicationW artykule przedstawiono problematykę dokładności pomiaru impedancji pętli zwarciowej w sieciach z obciążeniami roboczymi. Klasyczne metody pomiarowe i mierniki mogą powodować błędy pomiaru przekraczające dopuszczalną wartość. Z tego powodu może wystąpić ryzyko porażenia prądem elektrycznym, ponieważ przy doziemieniu nie będzie spełniony warunek samoczynnego wyłączenia zasilania. Błędy pomiaru w sieci z obciążeniami roboczymi można...
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Challenges in oscillometric blood pressure measurement in atrial fibrillation: looking for practical solutions
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Application of Maximum-Length Sequences to impulse response measurement of hydroacoustic communications systems
PublicationThere is a growing interest in digital transmission of telemetry data on ultrasonic waves. The dependence of signal attenuation on squared frequency, specific to the hy-droacoustic systems, induces problems that do not exist in monochromatic, narrowband radio communications systems. For adapting the transmission parameters to current propagation conditions, a precise knowledge of instantaneous changes of channel performances is...
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Evaluation of a 10 nm Particle Number Portable Emissions Measurement System (PEMS)
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MEASUREMENT AND ANALYSIS OF A FLOOD WAVE PROPAGATION ON THE KACZA RIVER IN GDYNIA IN NORTHERN POLAND
PublicationKacza river is located in northern Poland in the neighborhood of the Gulf of Gdansk and the Baltic Sea. A Kacza having length of 15 km and catchment area of 53 km2 collects the water into the Gulf mostly from inhabited and forested areas within the administrative boundaries of the city of Gdynia. On the 14th and 15th of July 2016 in northern Poland on the large area of Tri-City agglomeration (Gdynia, Gdansk and Sopot) total daily...