Search results for: SURFACE TOPOGRAPHY MEASUREMENT HIGH-FREQUENCY MEASUREMENT NOISE AUTOCORRELATION FUNCTION AUTOCORRELATION FUNCTION SHAPE ANALYSIS

• Roughness evaluation of turned composite surfaces by analysis of the shape of Autocorrelation Function

  Publication

  • P. Podulka
  • W. Macek
  • B. Zima
  • G. Lesiuk
  • R. Branco
  • G. Królczyk

  - MEASUREMENT - Year 2023

  In this paper, the application of an Autocorrelation Function for the characterisation of surface topography was validated. The roughness evaluation of turned composite surfaces was supported by sophisticated studies of the Autocorrelation Function properties, considering especially the shape of the function. Details were measured with the optical method. The selection of the surface roughness evaluation procedures was carried...

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• Resolving Selected Problems in Surface Topography Analysis by Application of the Autocorrelation Function

  Publication

  • P. Podulka

  - Coatings - Year 2022

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• Topography measurement methods evaluation for entire bending-fatigued fracture surfaces of specimens obtained by explosive welding

  Publication

  • P. Podulka
  • W. Macek
  • D. Rozumek
  • K. Żak
  • R. Branco

  - MEASUREMENT - Year 2023

  In this paper, the methods of compensation of differences in the results of entire bending-fatigued fracture surface topographies were presented. The roughness evaluation was performed with a focus variation microscope and confocal surface topography measurement techniques. The differences in the ISO 25178 roughness parameters were investigated and procedures for their compensation were studied. It was found that various types...

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• Autocorrelation function for the chosen effective potential of the diatomic silver anion

  Open Research Data

  open access

  • P. Jasik
  • J. Franz
  • D. Kędziera
  • T. Kilich
  • J. Kozicki
  • J. Sienkiewicz

  - series: Spontaneous electron emission versus dissociation in internally hot silver dimer anions

  The process of a two-channel decay of the diatomic silver anion (Ag2-), namely the spontaneous electron ejection giving Ag2 + e- and the dissociation leading to Ag- + Ag is theoretically studied. The ground state potential energy curves (PECs) of the neutral silver dimer and anionic silver diatomic molecule are calculated using the single reference...

• MEASUREMENT

  Journals

  ISSN: 0263-2241 , eISSN: 1873-412X

• Validation of dynamic electrochemical impedance spectrograms using autocorrelation function

  Publication

  • K. Darowicki
  • S. Wysmułek
  • A. Karólkowska
  • Ł. Gaweł

  - JOURNAL OF ELECTROANALYTICAL CHEMISTRY - Year 2024

  Validation of impedance data is essential for checking the reliability of experimental data. Kramers – Kronig transformation is used to verify data obtained from classical Electrochemical Impedance Spectroscopy (EIS) measurements. Data obtained from Dynamic Electrochemical Impedance Spectroscopy (DEIS) could be validated in the same way, but in this case, there is no information about internal consistency between every single spectrum...

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• Signals Features Extraction in Radioisotope Liquid-Gas Flow Measurements using Autocorrelation Function

  Publication

  • R. Hanus
  • M. Zych
  • A. Golijanek-Jędrzejczyk

  - Year 2022

  Knowledge of the two-phase flow structure is essential for the proper conduct of industrial processes. Description of liquid-gas flow regimes is possible by using of data analysis in time, frequency, or state-space domain. In this research studies, the autocorrelation function is applied for analysis of signals obtained for liquid-gas flow by use gamma-ray absorption. The experiments were carried out on the laboratory hydraulic...

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• OCENA UZIEMIEŃ SŁUPÓW LINII ELEKTROENERGETYCZNYCH ZWŁASZCZA POSADOWIONYCH NA GRUNTACH O WYSOKIEJ REZYSTYWNOŚCI

  Publication

  • S. Wojtas

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Year 2019

  W artykule została omówiona problematyka pomiaru i oceny właściwości uziemień słupów linii elektroenergetycznych z wykorzystaniem przebiegów wolno-i szybkozmiennych. Uzyskanie odpowiednio niskiej wartości rezystancji uziemienia słupa posadowionego na gruncie o rezystywności powyżej 1000Ωm może być trudne. Praca zawiera analizę zmian właściwości statycznych i udarowych uziemień w funkcji rezystywności...

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• Measurement Automation Monitoring

  Journals

  ISSN: 2450-2855

• Detection of measurement noise in surface topography analysis

  Publication

  • P. Podulka

  - Journal of Physics : Conference Series - Year 2021

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• Paweł Burdziakowski dr inż.

  People

  Department of Geodesy

  Paweł Burdziakowski, PhD, is a professional in low-altitude aerial photogrammetry and remote sensing, marine and aerial navigation. He is also a licensed flight instructor and software developer. His main areas of interest are digital photogrammetry, navigation of unmanned platforms and unmanned systems, including aerial, surface, underwater. He conducts research in algorithms and methods to improve the quality of spatial measurements...

• Metrology and Measurement Systems

  Journals

  ISSN: 0860-8229 , eISSN: 2300-1941

• MEASUREMENT OF NOISE IN SUPERCAPACITORS

  Publication

  • A. Szewczyk

  - Metrology and Measurement Systems - Year 2017

  A developed method and measurement setup for measurement of noise generated in a supercapacitor is presented. The requirements for noise data recording are considered and correlated with working modes of supercapacitors. An example of results of low-frequency noise measurements in commercially available supercapacitors are presented. The ability of flicker noise measurements suggests that they can be used to assess quality of tested supercapacitors.

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• Feature-Based Characterisation of Turned Surface Topography with Suppression of High-Frequency Measurement Errors

  Publication

  • P. Podulka

  - SENSORS - Year 2022

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• Measurements and Measurement Systems [2021/22]

  e-Learning Courses

  • A. Golijanek-Jędrzejczyk
  • A. Dzwonkowski
  • M. Śliwiński
  • M. Wołoszyn

  The aim of the course is to introduce theoretical and practical students with basic and advanced methods of measurement of various measured quantity and the design and function of the measurement systems.

• On-line measurement of wood surface smoothness

  Publication

  • J. Sandak
  • K. Orłowski
  • A. Sandak
  • D. Chuchała
  • P. Taube

  - Drvna Industrija - Year 2020

  The latest progress in the field of optics and microelectronics resulted in development of new generation vision systems capable of scanning surface topography with very high sampling frequencies. The blue color of illuminating light as well as novel systems for controlling ultra-thin laser line thickness allows measurement of the porous surface of wood with a triangulation method. Three alternative sensors were tested here in...

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• Reduction of Influence of the High-Frequency Noise on the Results of Surface Topography Measurements

  Publication

  • P. Podulka

  - Materials - Year 2021

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• A review of design approaches for the implementation of low-frequency noise measurement systems

  Publication

  • G. Scandurra
  • C. Ciofi
  • J. Smulko
  • H. Wen

  - REVIEW OF SCIENTIFIC INSTRUMENTS - Year 2022

  Electronic noise has its roots in the fundamental physical interactions between matter and charged particles, carrying information about the phenomena that occur at the microscopic level. Therefore, Low-Frequency Noise Measurements (LFNM) are a well-established technique for the characterization of electron devices and materials and, compared to other techniques, they offer the advantage of being non-destructive and of providing...

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• Utilization of a Non-Linear Error Function in a Positioning Algorithm for Distance Measurement Systems Designed for Indoor Environments

  Publication

  • A. Czapiewska

  - Journal of Sensor and Actuator Networks - Year 2019

  A new positioning algorithm for distance measurement systems is outlined herein. This algorithm utilizes a non-linear error function which allows us to improve the positioning accuracy in highly difficult indoor environments. The non-linear error function also allows us to adjust the performance of the algorithm to the particular environmental conditions. The well-known positioning algorithms have limitations, mentioned by their...

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• Analysis of the Usefulness of Cheap Audio Recorders for Spectral Measurement of Environmental Noise

  Publication

  • J. Skibicki
  • R. Licow
  • N. Karkosińska-Brzozowska
  • K. Daliga
  • P. Chrostowski
  • A. Wilk
  • K. Karwowski
  • M. Szafrański
  • T. Widerski
  • L. Jarzębowicz... and 4 others

  - Metrology - Year 2023

  Environmental noise pollution is nowadays one of the most serious health threats. The impact of noise on the human body depends not only on the sound level but also on its spectral distribution. Reliable measurements of the environmental noise spectrum are often hampered by the very high price of top quality measuring devices. This paper explores the possibility of using much cheaper audio recorders for the frequency analysis....

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• Conditions for measurement, analog-to-digital conversion and frequency analysis of irregularities of profile surface

  Publication

  • A. Boryczko

  - Metrology and Measurement Systems - Year 2002

  Przedstawiono uwarunkowania pomiaru, przetwarzania analogowo-cyfrowego i analizy częstotliwościowej nierówności powierzchni toczonych dla celów rozpoznawania ich głównych składowych. Przedstawiono ograniczenia w pomiarze igłą, która odwzorowuje nierówności poprzeczne. Podano zależności parametrów pomiaru cyfrowego nierówności warunkujące zakresy ich rozpatrywania. Dla wartości przedziału próbkowania, dla którego nie jest spełnione...

• Proposals of Frequency-Based and Direction Methods to Reduce the Influence of Surface Topography Measurement Errors

  Publication

  • P. Podulka

  - Coatings - Year 2022

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• Maciej Wróbel dr inż.

  People

  Department of Metrology and Optoelectronics

  Received PhD from Gdańsk University of Technology in 2019. Research interests involve non-invasive applications of Raman spectroscopy for tissue analysis, specifically blood parameters measurements. Tissue mimicking phantoms, measurement of optical properties (scattering, absorption), as well as other optical sensing methods. Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS) utilized for measurements of biological...

• Methods of measurement signal acquisition from the rotational flow meter for frequency analysis

  Publication

  • D. Świsulski
  • R. Hanus
  • M. Zych
  • L. Petryka

  - EPJ Web of Conferences - Year 2017

  One of the simplest and commonly used instruments for measuring the flow of homogeneous substances is the rotational flow meter. The main part of such a device is a rotor (vane or screw) rotating at a speed which is the function of the fluid or gas flow rate. A pulse signal with a frequency proportional to the speed of the rotor is obtained at the sensor output. For measurements in dynamic conditions, a variable interval between...

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• An analysis of a measurement probe for a high impedance spectroscopy analyzer

  Publication

  • J. Hoja
  • G. Lentka

  - MEASUREMENT - Year 2008

  W artykule przedstawiono sondę będącą obwodem wejściowym analizatora do spektroskopii wysokoimpedancyjnej. Sonda umożliwia pomiar impedancji jednym zaciskiem uziemnionej w zakresie od 100ohm do 100Gohm. Sonda umożliwia wydzielenie dwóch sygnałów proporcjonalnych do prądu i napięcia na impedancji mierzonej w szerokim zakresie częstotliwości od 100uHz do 100MHz.Przeprowadzono analizę sondy w której uwzględniono najważniejsze czynniki...

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• An analysis of a measurement probe for a high impedance spectroscopy analyzer

  Publication

  • J. Hoja
  • G. Lentka

  - MEASUREMENT - Year 2007

  W artykule przedstawiono sondę będącą obwodem wejściowym analizatora do spektroskopii wysokoimpedancyjnej. Sonda umożliwia pomiar impedancji jednym zaciskiem uziemnionej w zakresie od 100ohm do 100Gohm. Sonda umożliwia wydzielenie dwóch sygnałów proporcjonalnych do prądu i napięcia na impedancji mierzonej w szerokim zakresie częstotliwosci od 100uHz do 100MHz.Przeprowadzono analizę sondy w której uwzględniono najważniejsze czynniki...

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• Frequency measurement research with weight averaging of pulse output signal of voltage-to-frequency converter

  Publication

  • M. Dorozhovets
  • E. Pawłowski
  • D. Świsulski

  - MEASUREMENT - Year 2023

  The paper presents the essence and investigation of the efficiency of weight averaging of a pulse output signal of voltage-to-frequency converter. The effect of counting and the influence of interference on the result of weight averaging of frequency modulated pulses are analyzed. It is shown that from the point of view of counting error reduction, the best are polynomial weight functions. In the case of high interferences whose...

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• Function

  Journals

  eISSN: 2633-8823

• Measurements and Measurement Systems [2022/23]

  e-Learning Courses

  • A. Golijanek-Jędrzejczyk
  • A. Dzwonkowski

  Opis kursu: (np. numer semestru, dla którego przeznaczony jest kurs, cel lub tematyka przedmiotu) IV semestr kierunku Energy Technologies.  Celem kursu jest zapoznanie teoretyczne i praktyczne studentów z podstawowymi i zaawansowanymi metodami pomiarowymi różnych wielkości pomiarowych oraz budową i zasadą działania systemów pomiarowych.  The aim of the course is to introduce theoretical and practical students with basic...

• Food & Function

  Journals

  ISSN: 2042-6496 , eISSN: 2042-650X

• Compressible gas density measurement by means of Fourier analysis of interferograms

  Publication

  • J. Telega
  • R. Szwaba
  • M. Śmiałek-Telega

  - MEASUREMENT - Year 2022

  This paper describes a method for nonintrusive compressible gas density measurement by means of automated analysis of interferograms using FFT (Fast Fourier Transform), and its implementation using DFT (Discrete Fourier Transform), that does make this measurement technique a fairly valuable and accessible experimental method. The presented approach makes it possible to use the finite fringe setting of the interferometer, thus reducing...

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• A measurement system for nonlinear surface spectroscopy with an atomic force microscope during corrosion process monitoring

  Publication

  • S. Babicz-Kiewlicz
  • A. Zieliński
  • J. Smulko
  • K. Darowicki

  - Measurement Automation Monitoring - Year 2013

  In addition to traditional imaging the surface, atomic force microscopy (AFM) enables wide variety of additional measurements. One of them is higher harmonic imaging. In tapping mode the nonlinear contact between tip and specimen results in higher frequency vibrations. More information available from the higher harmonics analysis proves to be helpful for more detailed imaging. Such visualization is espe-cially useful for heterogeneous...

• MEASUREMENT SCIENCE & TECHNOLOGY

  Journals

  ISSN: 0957-0233 , eISSN: 1361-6501

• Flicker Noise in Resistive Gas Sensors—Measurement Setups and Applications for Enhanced Gas Sensing

  Publication

  • J. Smulko
  • G. Scandurra
  • K. Drozdowska
  • A. Kwiatkowski
  • C. Ciofi
  • H. Wen

  - SENSORS - Year 2024

  We discuss the implementation challenges of gas sensing systems based on low-frequency noise measurements on chemoresistive sensors. Resistance fluctuations in various gas sensing materials, in a frequency range typically up to a few kHz, can enhance gas sensing by considering its intensity and the slope of power spectral density. The issues of low-frequency noise measurements in resistive gas sensors, specifically in two-dimensional...

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• Digital Processing of Frequency–Pulse Signal in Measurement System

  Publication

  • D. Świsulski
  • E. Pawłowski
  • M. Dorozhovets

  - Year 2018

  The work presents the issue of the use of multichannel measurement systems of sensors processing input value to impulse signal frequency. The frequency impulse signal obtained from such sensors is often required to be processed at the same time with a voltage signal which is obtained from other sensors used in the same measurement system. In such case, it is usually necessary to sample the output signals from all sensors in the...

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• Influence of vision measurement system spatial configuration on measurement uncertainty, based on the example of electric traction application

  Publication

  • J. Skibicki
  • S. Judek

  - MEASUREMENT - Year 2018

  Technical diagnostics plays a significant role in ensuring operational reliability of electrified rail transport. The most critical point in the transmission of electric energy to vehicles is the sliding contact of the current collector with the traction network. For this reason, work is currently being carried on new measuring methods, whose appliance allows for more complete diagnostics of the contact line and current collectors,...

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• Shaping coherence function of sources used in low-coherent measurement techniques

  Publication

  • M. Szczerska

  - The European Physical Journal-Special Topics - Year 2007

  W niskokoherencyjnych technikach pomiarowych kształt funkcji koherencji wykorzystywanego źródła ma bezpośredni wpływ na parametry metrologiczne układu pomiarowego. Z tego względu, w wielu aplikacjach niezbędne jest użycie metod pozwalających na zmianę kształtu tej funkcji. W artykule przeanalizowano możliwości kształtowania funkcji koherencji, a przedstawione analizy teoretyczne i wyniki symulacji komputerowych wskazują, że kształtowanie...

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• Shaping coherence function of sources used in low-coherent measurement techniques

  Publication

  • M. Jedrzejewska-Szczerska

  - The European Physical Journal-Special Topics - Year 2007

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• Shaping of coherence function of sources used in low-coherent measurement techniques

  Publication

  • M. Szczerska
  • B. Kosmowski
  • R. Hypszer

  - JOURNAL DE PHYSIQUE IV - Year 2006

  W artykule przedstawiono zależność pomiędzy charakterystyką widmową źródła i ekwiwalentną długością drogi koherencji źródła. Wyniki analizy teoretycznej i symulacji komputerowych wykazały, że użycie źródła syntezowanego wpływa na zmniejszenie wartości ekwiwalentnej długości drogi koherencji. Dodatkowo wykazano, że zmniejszenie ekwiwalentnej długości drogi koherencji można otrzymać poprzez odpowiednie kształtowanie funkcji koherencji...

• IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT

  Journals

  ISSN: 0018-9456 , eISSN: 1557-9662

• Analysis of Vibration and Acoustic Signals for Noncontact Measurement of Engine Rotation Speed

  Publication

  • S. Xuansheng
  • T. Lu
  • H. Wen
  • R. Martinek
  • J. Smulko

  - SENSORS - Year 2020

  The non-contact measurement of engine speed can be realized by analyzing engine vibration frequency. However, the vibration signal is distorted by harmonics and noise in the measurement. This paper presents a novel method for the measurement of engine rotation speed by using the cross-correlation of vibration and acoustic signals. This method can enhance the same frequency components in engine vibration and acoustic signal. After...

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• Improved Procedures for Feature-Based Suppression of Surface Texture High-Frequency Measurement Errors in the Wear Analysis of Cylinder Liner Topographies

  Publication

  • P. Podulka

  - Metals - Year 2021

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• Measurement of noise parameter set in the low frequency range: requirements and instrumentation.

  Publication

  • L. Hasse

  - Year 2004

  Opisano 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...

• A High-Efficient Measurement System With Optimization Feature for Prototype CMOS Image Sensors

  Publication

  • M. Kłosowski
  • J. Jakusz
  • W. Jendernalik
  • G. Blakiewicz
  • S. Szczepański
  • S. Kozieł

  - IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT - Year 2018

  In this paper, a gray-scale CMOS image sensor (CIS) characterization system with an optimization feature has been proposed. By using a very fast and precise control of light intensity, based on the pulsewidth-modulation method, it is avoided to measure the illuminance every time. These features accelerate the multicriteria CIS optimization requiring many thousands of measurements. The system throughput is 2.5 Gb/s, which allows...

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• The smoothness test for a density function

  Publication

  • B. Ćmiel
  • K. Dziedziul
  • B. Wolnik

  - NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS - Year 2014

  The problem of testing hypothesis that a density function has no more than μ derivatives versus it has more than μ derivatives is considered. For a solution, the L2 norms of wavelet orthogonal projections on some orthogonal ‘‘differences’’ of spaces from a multiresolution analysis is used. For the construction of the smoothness test an asymptotic distribution of a smoothness estimator is used. To analyze that asymptotic distribution,...

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• A system for acoustic field measurement employing cartesian robot

  Publication

  • M. Szczodrak
  • A. Kurowski
  • J. Kotus
  • A. Czyżewski
  • B. Kostek

  - Metrology and Measurement Systems - Year 2016

  A system setup for measurements of acoustic field, together with the results of 3D visualisations of acoustic energy flow are presented in the paper. Spatial sampling of the field is performed by a Cartesian robot. Automatization of the measurement process is achieved with the use of a specialized control system. The method is based on measuring the sound pressure (scalar) and particle velocity (vector) quantities. The aim of the...

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• Noise measurement setups for fluctuations enhanced gas sensing

  Publication

  • M. Kotarski
  • J. Smulko

  - Metrology and Measurement Systems - Year 2009

  Obserwacje zjawisk fluktuacyjnych w sensorach gazów pozwala zwiększyć czułość i selektywność detekcji gazów. Problemem jest budowa prostego i taniego systemu do obserwacji tych zjawisk. W artykule przedstawiono dwa systemy pozwalające na obserwacje szumów w rezystancyjnych sensorach gazów dostępnych na rynku i prototypowych, wykonanych z warstwy nanocząstek o zbliżonych wymiarach.

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• A method of two-terminal excess noise measurement with a reduction of measurement system and contact noise

  Publication

  • A. Szewczyk
  • L. Spiralski
  • L. Hasse

  - Year 2005

  Przedstawiono metodę i system do pomiaru szumów nadmiarowych dwójników elektrycznych ze znaczną redukcją wpływu szumów własnych systemu pomiarowego i szumów kontaków. Proponowana metoda może byc zastosowana do pomiaru szumów elementów z wyprowadzonymi końcówkami, bądź też struktur, gdy jako wzorcowy szum odniesienia może zostać zastosowany szum struktury rezystywnej wytworzonej bezpośrednio na strukturze w otoczeniu elementu testowanego.

• Low Frequency Noise Measurement of Reverse Polarized Silicon Carbide Schottky Diodes

  Publication

  • A. Szewczyk
  • B. Stawarz-Graczyk

  - Year 2009

  W artykule przedstawiono wyniki pomiaró szumów cz. wstecznie spolaryzowanych diod Schottky'ego.

• PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS

  Journals

  ISSN: 0887-3585 , eISSN: 1097-0134