Rok 2021

• Sensors and Sensor’s Fusion in Autonomous Vehicles

  Publikacja

  • A. Stateczny
  • M. Wlodarczyk-Sielicka
  • P. Burdziakowski

  - SENSORS - Rok 2021

  Autonomous vehicle navigation has been at the center of several major developments, both in civilian and defense applications. New technologies such as multisensory data fusion, big data processing, and deep learning are changing the quality of areas of applications, improving the sensors and systems used. New ideas such as 3D radar, 3D sonar, LiDAR, and others are based on autonomous vehicle revolutionary development. The Special...

  Pełny tekst do pobrania w portalu

• Software-Defined NB-IoT Uplink Framework - The Design, Implementation and Use Cases

  Publikacja

  • A. Olejniczak
  • O. Błaszkiewicz
  • K. Cwalina
  • P. Rajchowski
  • J. Sadowski

  - SENSORS - Rok 2021

  In the radiocommunication area, we may observe a rapid growth of new technology, such as 5G. Moreover, all the newly introduced radio interfaces, e.g., narrowband Internet of Things (NB-IoT), are strongly dependent on the software. Hence, the radiocommunication software development and optimization, as well as the 3GPP technical specification, should be introduced at the academic level of education. In this paper, a software-defined...

  Pełny tekst do pobrania w portalu

• Study of the Performance of DSSS UAC System Depending on the System Bandwidth and the Spreading Sequence

  Publikacja

  • I. Kochańska
  • R. Salamon
  • J. Schmidt
  • A. Schmidt

  - SENSORS - Rok 2021

  A signal transmitted in an Underwater Acoustic Communication (UAC) system operating in a shallow-water channel suffers from strong time dispersion due to multipath propagation. This causes the Inter-Symbol Interference (ISI) observed in the received signal, which significantly limits the communication system’s reliability and transmission rate. In such propagation conditions, the Direct-Sequence Spread Spectrum (DSSS) method is...

  Pełny tekst do pobrania w portalu

• The Concept of Accuracy Analysis of the Vertical Displacements Gained from the Hydrostatic Levelling Systems’ Measurements

  Publikacja

  • W. Kamiński

  - SENSORS - Rok 2021

  Abstract: 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...

  Pełny tekst do pobrania w portalu

• The influence of the grid density of measurement points on damage detection in an isotropic plate by the use of elastic waves and laser scanning Doppler vibrometry

  Publikacja

  • Ł. Doliński
  • M. Krawczuk
  • M. Palacz
  • W. Waszkowiak
  • A. Żak

  - SENSORS - Rok 2021

  Damage detection in structural components, especially in mechanical engineering, is an 2 important element of engineering practice. There are many methods of damage detection, in which 3 changes in various parameters caused by the presence of damage are analysed. Recently, methods 4 based on the analysis of changes in dynamic parameters of structures, i.e. frequencies or mode shapes 5 of natural vibrations, as well as changes in...

  Pełny tekst do pobrania w portalu

• The Optical Coherence Tomography and Raman Spectroscopy for Sensing of the Bone Demineralization Process

  Publikacja

  • M. J. Głowacki
  • A. M. Kamińska (dawniej: A. Kamińska)
  • M. Gnyba
  • J. Pluciński
  • M. Strąkowski

  - SENSORS - Rok 2021

  The presented research was intended to seek new optical methods to investigate the demineralization process of bones. Optical examination of the bone condition could facilitate clinical trials and improve the safety of patients. The authors used a set of complementary methods: polarization-sensitive optical coherence tomography (PS-OCT) and Raman spectroscopy. Chicken bone samples were used in this research. To stimulate in laboratory...

  Pełny tekst do pobrania w portalu

• The Quality of Life and Satisfaction with Continuous Glucose Monitoring Therapy in Children under 7 Years of Age with T1D Using the rtCGM System Integrated with Insulin Pump—A Caregivers Point of View

  Publikacja

  • E. Rusak
  • N. Ogarek
  • K. Wolicka
  • A. Mrówka
  • S. Seget
  • M. Kuźnik
  • P. Jarosz-Chobot

  - SENSORS - Rok 2021

  Pełny tekst do pobrania w serwisie zewnętrznym

• Tracking Fluorescent Dye Dispersion from an Unmanned Aerial Vehicle

  Publikacja

  • P. Burdziakowski
  • P. Zima
  • P. Wielgat
  • D. Kalinowska

  - SENSORS - Rok 2021

  Commercial unmanned aerial vehicles continue to gain popularity and their use for collecting image data and recording new phenomena is becoming more frequent. This study presents an effective method for measuring the concentration of fluorescent dyes (fluorescein and Rhodamine WT) for the purpose of providing a mathematical dispersion model. Image data obtained using a typical visible-light camera was used to measure the concentration...

  Pełny tekst do pobrania w portalu

• UAV Photogrammetry under Poor Lighting Conditions—Accuracy Considerations

  Publikacja

  • P. Burdziakowski
  • K. Bobkowska

  - SENSORS - Rok 2021

  The use of low-level photogrammetry is very broad, and studies in this field are conducted in many aspects. Most research and applications are based on image data acquired during the day, which seems natural and obvious. However, the authors of this paper draw attention to the potential and possible use of UAV photogrammetry during the darker time of the day. The potential of night-time images has not been yet widely recognized,...

  Pełny tekst do pobrania w portalu

• Vessel Scheduling Optimization Model Based on Variable Speed in a Seaport with One-Way Navigation Channel

  Publikacja

  • D. Liu
  • G. Shi
  • K. Hirayama

  - SENSORS - Rok 2021

  Pełny tekst do pobrania w serwisie zewnętrznym

• Voice Multilateration System

  Publikacja

  • R. Burczyk
  • K. Cwalina
  • M. Gajewska
  • J. Magiera
  • P. Rajchowski
  • J. Sadowski
  • J. Stefański

  - SENSORS - Rok 2021

  This paper presents an innovative method of locating airplanes, which uses only voice communication between an air traffic controller and the pilot of an aircraft. The proposed method is described in detail along with its practical implementation in the form of a technology demonstrator (proof of concept), included in the voice communication system (VCS). A complete analysis of the performance of the developed method is presented,...

  Pełny tekst do pobrania w portalu

• Wood Moisture-Content Measurement Accuracy of Impregnated and Nonimpregnated Wood

  Publikacja

  • J. Barański
  • A. Suchta
  • S. Barańska
  • I. Klement
  • T. Vilkovská
  • P. Vilkovský

  - SENSORS - Rok 2021

  The influence of the impregnation process of pine wood (Pinus sylvestris L.) samples on the electrical resistance changes and the moisture-content measurement accuracy is presented in this paper. In this study, the resistances of impregnated and nonimpregnated green pine timber harvested from northern Poland were compared. An impregnation method based on a vacuum-pressure chamber was used. Copper salts were applied as the impregnated...

  Pełny tekst do pobrania w portalu

Rok 2020

• A 1-nS 1-V Sub-1-µW Linear CMOS OTA with Rail-to-Rail Input for Hz-Band Sensory Interfaces

  Publikacja

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

  - SENSORS - Rok 2020

  The paper presents an operational transconductance amplifier (OTA) with low transconductance (0.62–6.28 nS) and low power consumption (28–270 nW) for the low-frequency analog front-ends in biomedical sensor interfaces. The proposed OTA implements an innovative, highly linear voltage-to-current converter based on the channel-length-modulation effect, which can be rail-to-rail driven. At 1-V supply and 1-Vpp asymmetrical input driving,...

  Pełny tekst do pobrania w portalu

• A Review of Emotion Recognition Methods Based on Data Acquired via Smartphone Sensors

  Publikacja

  • A. Kołakowska
  • W. Szwoch
  • M. Szwoch

  - SENSORS - Rok 2020

  In recent years, emotion recognition algorithms have achieved high efficiency, allowing the development of various affective and affect-aware applications. This advancement has taken place mainly in the environment of personal computers offering the appropriate hardware and sufficient power to process complex data from video, audio, and other channels. However, the increase in computing and communication capabilities of smartphones,...

  Pełny tekst do pobrania w portalu

• Accuracy Analysis of Measuring X-Y-Z Coordinates with Regard to the Investigation of the Tombolo Effect

  Publikacja

  • R. Masnicki
  • C. Specht
  • J. Mindykowski
  • P. Dąbrowski
  • M. Specht

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Accuracy of Trajectory Tracking Based on Nonlinear Guidance Logic for Hydrographic Unmanned Surface Vessels

  Publikacja

  • A. Stateczny
  • P. Burdziakowski
  • K. Najdecka
  • B. Domagalska-Stateczna

  - SENSORS - Rok 2020

  A new trend in recent years for hydrographic measurement in water bodies is the use of unmanned surface vehicles (USVs). In the process of navigation by USVs, it is particularly important to control position precisely on the measuring profile. Precise navigation with respect to the measuring profile avoids registration of redundant data and thus saves time and survey costs. This article addresses the issue of precise navigation...

  Pełny tekst do pobrania w portalu

• Analysis of Satellite Compass Error’s Spectrum

  Publikacja

  • A. Felski
  • K. Jaskólski
  • K. Zwolak
  • P. Piskur
  • P. Piskur

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• 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

  Publikacja

  • J. Pyrchla
  • K. Pyrchla
  • P. Kowalska
  • A. Tomczak
  • G. Zaniewicz

  - SENSORS - Rok 2020

  LaCoste) 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...

  Pełny tekst do pobrania w portalu

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

  Publikacja

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

  - SENSORS - Rok 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...

  Pełny tekst do pobrania w portalu

• Analyzing the Effectiveness of the Brain–Computer Interface for Task Discerning Based on Machine Learning

  Publikacja

  • J. Browarczyk
  • A. Kurowski
  • B. Kostek

  - SENSORS - Rok 2020

  The aim of the study is to compare electroencephalographic (EEG) signal feature extraction methods in the context of the effectiveness of the classification of brain activities. For classification, electroencephalographic signals were obtained using an EEG device from 17 subjects in three mental states (relaxation, excitation, and solving logical task). Blind source separation employing independent component analysis (ICA) was...

  Pełny tekst do pobrania w portalu

• Application of Diversity Combining with RLS Adaptive Filtering in Data Transmission in a Hydroacoustic Channel

  Publikacja

  • A. Czapiewska
  • R. Studański
  • A. Łuksza
  • A. Żak

  - SENSORS - Rok 2020

  When transmitting data in a hydroacoustic channel under difficult propagation conditions, one of the problems is intersymbol interference (ISI) caused mainly by the effect of multipath propagation. This phenomenon leads to a decrease in transmission parameters, and sometimes completely prevents it. Therefore, we have made an attempt to use diversity combining with Recursive Least Squares (RLS) adaptive filtering to improve the...

  Pełny tekst do pobrania w portalu

• Application of least squares with conditional equations method for railway track inventory using GNSS observations

  Publikacja

  • K. Czaplewski
  • Z. Wiśniewski
  • C. Specht
  • A. Wilk
  • W. Koc
  • K. Karwowski
  • J. Skibicki
  • P. S. Dąbrowski
  • B. Czaplewski
  • M. Specht... i 5 innych

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Application of Least Squares with Conditional Equations Method for Railway Track Inventory Using GNSS Observations

  Publikacja

  • K. Czaplewski
  • Z. Wiśniewski
  • C. Specht
  • A. Wilk
  • W. Koc
  • K. Karwowski
  • J. Skibicki
  • P. Dąbrowski
  • B. Czaplewski
  • M. Specht... i 5 innych

  - SENSORS - Rok 2020

  Satellite geodetic networks are commonly used in surveying tasks, but they can also be used in mobile surveys. Mobile satellite surveys can be used for trackage inventory, diagnostics and design. The combination of modern technological solutions with the adaptation of research methods known in other fields of science offers an opportunity to acquire highly accurate solutions for railway track inventory. This article presents the...

  Pełny tekst do pobrania w portalu

• Assessment of Electronic Sensing Techniques for the Rapid Identification of Alveolar Echinococcosis through Exhaled Breath Analysis

  Publikacja

  • A. Kwiatkowski
  • T. Chludziński
  • T. Saidi
  • T. Welearegay
  • A. Jaimes-Mogollón
  • N. El Bari
  • S. Borys
  • B. Bouchikhi
  • J. Smulko
  • R. Ionescu

  - SENSORS - Rok 2020

  Here we present a proof-of-concept study showing the potential of a chemical gas sensors system to identify the patients with alveolar echinococcosis disease through exhaled breath analysis. The sensors system employed comprised an array of three commercial gas sensors and a custom gas sensor based on WO3 nanowires doped with gold nanoparticles, optimized for the measurement of common breath volatile organic compounds. The measurement...

  Pełny tekst do pobrania w portalu

• Assessment of the Speed Management Impact on Road Traffic Safety on the Sections of Motorways and Expressways Using Simulation Methods

  Publikacja

  • J. Oskarbski
  • T. Kamiński
  • K. Kyamakya,
  • J. C. Chedjou,
  • K. Żarski
  • M. Pędzierska

  - SENSORS - Rok 2020

  Methods used to evaluate the impact of Intelligent Transport System (ITS) services on road safety are usually based on expert assessments or statistical studies. However, commonly used methods are challenging to apply in the planning process of ITS services. This paper presents the methodology of research using surrogate safety measures calculated and calibrated with the use of simulation techniques and a driving simulator. This...

  Pełny tekst do pobrania w portalu

• Combined Long-Period Fiber Grating and Microcavity In-Line Mach–Zehnder Interferometer for Refractive Index Measurements with Limited Cross-Sensitivity

  Publikacja

  • M. Janik
  • M. Koba
  • K. Król
  • P. Mikulic
  • W. J. Bock
  • M. Śmietana

  - SENSORS - Rok 2020

  This work discusses sensing properties of a long-period grating (LPG) and microcavity in-line Mach–Zehnder interferometer (µIMZI) when both are induced in the same single-mode optical fiber. LPGs were either etched or nanocoated with aluminum oxide (Al2O3) to increase its refractive index (RI) sensitivity up to ≈2000 and 9000 nm/RIU, respectively. The µIMZI was machined using a femtosecond laser as a cylindrical cavity (d = 60...

  Pełny tekst do pobrania w portalu

• Compressive Sensing Approach to Harmonics Detection in the Ship Electrical Network

  Publikacja

  • B. Pałczyńska (dawniej: B. Palczynska)
  • R. Maśnicki
  • J. Mindykowski

  - SENSORS - Rok 2020

  The contribution of this paper is to show the opportunities for using the compressive sensing (CS) technique for detecting harmonics in a frequency sparse signal. The signal in a ship’s electrical network, polluted by harmonic distortions, can be modeled as a superposition of a small number of sinusoids and the discrete Fourier transform (DFT) basis forms its sparse domain. According to the theory of CS, a signal may be reconstructed...

  Pełny tekst do pobrania w portalu

• Debonding Size Estimation in Reinforced Concrete Beams Using Guided Wave-Based Method

  Publikacja

  • B. Zima
  • R. Kędra

  - SENSORS - Rok 2020

  The following paper presents the results of the theoretical and experimental analysis of the influence of debonding size on guided wave propagation in reinforced concrete beams. The main aim of the paper is a development of a novel, baseline-free method for determining the total area of debonding between steel rebar embedded in a concrete cover on the basis of the average wave velocity or the time of flight. The correctness of...

  Pełny tekst do pobrania w portalu

• Digital filtering of railway track coordinates in mobile multi-receiver GNSS measurements

  Publikacja

  • A. Wilk
  • W. Koc
  • C. Specht
  • S. Judek
  • K. Karwowski
  • P. Chrostowski
  • K. Czaplewski
  • P. S. Dąbrowski
  • S. Grulkowski
  • R. Licow... i 3 innych

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Digital Filtering of Railway Track Coordinates in Mobile Multi–Receiver GNSS Measurements

  Publikacja

  • A. Wilk
  • W. Koc
  • C. Specht
  • S. Judek
  • K. Karwowski
  • P. Chrostowski
  • K. Czaplewski
  • P. Dąbrowski
  • S. Grulkowski
  • R. Licow... i 3 innych

  - SENSORS - Rok 2020

  The article discusses an important issue in connection with the technique of mobile Global Navigation Satellite System (GNSS) measurements of railway track coordinates, which is digital filtering performed to precisely determine railway track axes. For this purpose, a measuring technique is proposed which bases on the use of a measuring platform with a number of appropriately distributed GNSS receivers, where two of them determine...

  Pełny tekst do pobrania w portalu

• Direction-of-Arrival Estimation Methods in Interferometric Echo Sounding

  Publikacja

  • P. Grall
  • I. Kochańska
  • J. Marszal

  - SENSORS - Rok 2020

  Nowadays, there are two leading sea sounding technologies: the multibeam echo sounder and the multiphase echo sounder (also known as phase-dierence side scan sonar or bathymetric side scan sonar). Both solutions have their advantages and disadvantages, and they can be perceived as complementary to each other. The article reviews the development of interferometric echo sounding array configurations and the various methods applied...

  Pełny tekst do pobrania w portalu

• Energy Versus Throughput Optimisation for Machine-to-Machine Communication

  Publikacja

  • E. Fitzgerald
  • M. Pióro
  • A. Tomaszewski

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Estimation and Prediction of Vertical Deformations of Random Surfaces, Applying the Total Least Squares Collocation Method

  Publikacja

  • Z. Wiśniewski
  • W. Kamiński

  - SENSORS - Rok 2020

  This paper proposes a method for determining the vertical deformations treated as random fields. It is assumed that the monitored surfaces are subject not only to deterministic deformations, but also to random fluctuations. Furthermore, the existence of random noise coming from surface’s vibrations is also assumed. Such noise disturbs the deformation’s functional models. Surface monitoring with the use of the geodetic levelling...

  Pełny tekst do pobrania w portalu

• Evaluation of the possibility of identifying a complex polygonal tram track layout using multiple satellite measurements

  Publikacja

  • A. Wilk
  • C. Specht
  • W. Koc
  • K. Karwowski
  • J. Skibicki
  • J. Szmagliński
  • P. Chrostowski
  • P. S. Dąbrowski
  • M. Specht
  • M. Zienkiewicz... i 3 innych

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Evaluation of the Possibility of Identifying a Complex Polygonal Tram Track Layout Using Multiple Satellite Measurements

  Publikacja

  • A. Wilk
  • C. Specht
  • W. Koc
  • K. Karwowski
  • J. Skibicki
  • J. Szmagliński
  • P. Chrostowski
  • P. S. Dabrowski
  • M. Specht
  • M. Zienkiewicz... i 3 innych

  - SENSORS - Rok 2020

  We 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....

  Pełny tekst do pobrania w portalu

• Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors

  Publikacja

  • M. Kłosowski
  • Y. Sun

  - SENSORS - Rok 2020

  In the paper, a digital clock stopping technique for gain and offset correction in time-mode analog-to-digital converters (ADCs) has been proposed. The technique is dedicated to imagers with massively parallel image acquisition working in the time mode where compensation of dark signal non-uniformity (DSNU) as well as photo-response non-uniformity (PRNU) is critical. Fixed pattern noise (FPN) reduction has been experimentally validated...

  Pełny tekst do pobrania w portalu

• Framework for Structural Health Monitoring of Steel Bridges by Computer Vision

  Publikacja

  • A. Marchewka
  • P. Ziółkowski
  • V. Aguilar-vidal

  - SENSORS - Rok 2020

  The monitoring of a structural condition of steel bridges is an important issue. Good condition of infrastructure facilities ensures the safety and economic well-being of society. At the same time, due to the continuous development, rising wealth of the society and socio-economic integration of countries, the number of infrastructural objects is growing. Therefore, there is a need to introduce an easy-to-use and relatively low-cost...

  Pełny tekst do pobrania w portalu

• Hydroacoustic System in a Biomimetic Underwater Vehicle to Avoid Collision with Vessels with Low-Speed Propellers in a Controlled Environment

  Publikacja

  • P. Piskur
  • P. Szymak
  • K. Jaskólski
  • L. Flis
  • M. Gąsiorowski

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Long-Period Gratings and Microcavity In-Line Mach Zehnder Interferometers as Highly Sensitive Optical Fiber Platforms for Bacteria Sensing

  Publikacja

  • T. Eftimov
  • M. Janik
  • M. Koba
  • M. Śmietana
  • P. Mikulic
  • W. J. Bock

  - SENSORS - Rok 2020

  Selected optical fiber sensors offer extraordinary sensitivity to changes in external refractive (RI), which make them promising for label-free biosensing. In this work the most sensitive ones, namely long-period gratings working at (DTP-LPG) and micro-cavity in-line Mach-Zehnder interferometers (µIMZI) are discussed for application in bacteria sensing. We describe their working principles and RI sensitivity when operating in water...

  Pełny tekst do pobrania w portalu

• Low-Cost Automated Design of Compact Branch-Line Couplers

  Publikacja

  • A. Bekasiewicz

  - SENSORS - Rok 2020

  Branch-line couplers (BLCs) are important components of wireless communication systems. Conventional BLCs are often characterized by large footprints which make miniaturization an important prerequisite for their application in modern devices. State-of-the-art approaches to design of compact BLCs are largely based on the use of high-permittivity substrates and multi-layer topologies. Alternative methods involve replacement of transmission-line...

  Pełny tekst do pobrania w portalu

• Machine Learning Modelling and Feature Engineering in Seismology Experiment

  Publikacja

  • M. Brykov
  • I. Petryshynets
  • C. Pruncu
  • V. Efremenko
  • D. Pimenov
  • K. Giasin
  • S. Sylenko
  • S. Wojciechowski

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Magnetoelectric Vortex Magnetic Field Sensors Based on the Metglas/PZT Laminates

  Publikacja

  • D. Huong
  • H. Tam
  • V. Ngoc
  • N. Vinh
  • P. Anh
  • N. Van
  • N. Thi
  • N. Duc
  • P. Anh-Tuan

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Monitoring the BTEX Volatiles during 3D Printing with Acrylonitrile Butadiene Styrene (ABS) Using Electronic Nose and Proton Transfer Reaction Mass Spectrometry

  Publikacja

  • W. Wojnowski
  • K. Kalinowska
  • J. Gębicki
  • B. Zabiegała

  - SENSORS - Rok 2020

  We describe a concept study in which the changes of concentration of benzene, toluene, ethylbenzene, and xylene (BTEX) compounds and styrene within a 3D printer enclosure during printing with different acrylonitrile butadiene styrene (ABS) filaments were monitored in real-time using a proton transfer reaction mass spectrometer and an electronic nose. The quantitative data on the concentration of the BTEX compounds, in particular...

  Pełny tekst do pobrania w portalu

• Monitoring the BTEX Volatiles during 3D Printing with Acrylonitrile Butadiene Styrene (ABS) Using Electronic Nose and Proton Transfer Reaction Mass Spectrometry

  Publikacja

  • W. Wojnowski
  • K. Kalinowska
  • J. Gębicki
  • B. Zabiegała

  - SENSORS - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Nondestructive Testing of the Miter Gates Using Various Measurement Methods

  Publikacja

  • M. Binczyk
  • P. Kalitowski
  • J. Szulwic
  • P. Tysiąc

  - SENSORS - Rok 2020

  When any problems related to civil engineering structures appear, identifying the issue through the usage of only one measuring method is difficult. Therefore, comprehensive tests are required to identify the main source. The strains and displacement measurements, as well as modal identification, are widely used in the nondestructive testing of structures. However, measurements are usually carried out at several points and confirm...

  Pełny tekst do pobrania w portalu

• Person Tracking in Ultra-Wide Band Hybrid Localization System Using Reduced Number of Reference Nodes

  Publikacja

  • P. Rajchowski
  • J. Stefański
  • J. Sadowski
  • K. Cwalina

  - SENSORS - Rok 2020

  In this article a novel method of positional data integration in an indoor hybrid localization system combining inertial navigation with radio distance measurements is presented. A point of interest is the situation when the positional data and the radio distance measurements are obtained from less than thee reference nodes and it is impossible to unambiguously localize the moving person due to undetermined set of positional equations....

  Pełny tekst do pobrania w portalu

• Photoplethysmographic Time-Domain Heart Rate Measurement Algorithm for Resource-Constrained Wearable Devices and its Implementation

  Publikacja

  • M. Wójcikowski
  • B. Pankiewicz

  - SENSORS - Rok 2020

  This paper presents an algorithm for the measurement of the human heart rate, using photoplethysmography (PPG), i.e., the detection of the light at the skin surface. The signal from the PPG sensor is processed in time-domain; the peaks in the preprocessed and conditioned PPG waveform are detected by using a peak detection algorithm to find the heart rate in real time. Apart from the PPG sensor, the accelerometer is also used to...

  Pełny tekst do pobrania w portalu

• Position Estimation in Corridors Along the Coupled Mode of Radiating Cables

  Publikacja

  • O. Błaszkiewicz
  • J. Sadowski
  • J. Stefański

  - SENSORS - Rok 2020

  Radiating cables are mostly used to provide radio communication in tunnels or corridors, but they can also be used to estimate the position of a mobile terminal along the cable. In this paper, a measuring receiver’s position was estimated by measuring the difference in the direct signal’s reception time, which was generated by a transmitter connected to one end of the radiating cable, and the delayed signal retransmitted from another...

  Pełny tekst do pobrania w portalu

• Potentiometric Solid-Contact Ion-Selective Electrode for Determination of Thiocyanate in Human Saliva

  Publikacja

  • M. Urbanowicz
  • K. Sadowska
  • D. G. Pijanowska
  • R. Pomećko
  • M. Bocheńska

  - SENSORS - Rok 2020

  A new solid-contact potentiometric ion-selective electrode for the determination of SCN− (SCN-ISE) has been described. Synthesized phosphonium derivative of calix[4]arene was used as a charged ionophore. The research included selection of the ion-selective membrane composition, determination of the ISEs metrological parameters and SCN-ISE application for thiocyanate determination in human saliva. Preparation of the ISEs included...

  Pełny tekst do pobrania w portalu

• Reduction of the Multipath Propagation Effect in a Hydroacoustic Channel Using Filtration in Cepstrum

  Publikacja

  • A. Czapiewska
  • A. Łuksza
  • R. Studański
  • A. Żak

  - SENSORS - Rok 2020

  During data transmission in a hydroacoustic channel, one of the problems is the multipath propagation effect, which leads to a decrease in the transmission parameters and sometimes completely prevents it. Therefore, we have attempted to develop a method, which is based on a recorded hydroacoustic signal, that allows us to recreate the original (generated) signal by eliminating the multipath effect. In our method, we use cepstral...

  Pełny tekst do pobrania w portalu