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1

An automated system for calibration table calculation of cylindrical horizontal tanks

Proskurenko Denis, Bezuglyi Mykhailo

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

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2026

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T. 16, nr 1

29--34

EN

The article presents the results of the development and implementation of the software "Automated Calculation of Calibration Table" for the calibration of steel cylindrical horizontal tanks obtained using 3D laser scanning. The proposed system automates the processing of 3D point clouds using a hybrid segmentation method (RANSAC and DBSCAN) and improved geometric formulas for calculating a per-millilitre capacity table. The results of calculating volumes and capacity coefficients are compared with alternative enterprise software, which demonstrates an increase in accuracy by 5–15% and a reduction in processing time by 70–80%. The developed software adapts to tank deformations, ensuring reliability in industrial conditions, which is confirmed by data analysis for 10 tanks with a cloud density of 5–15 million points.

PL

Artykuł przedstawia wyniki opracowania i wdrożenia oprogramowania "Automatyczne obliczanie tabeli kalibracji" do kalibracji stalowych cylindrycznych zbiorników poziomych uzyskanych za pomocą skanowania laserowego 3D. Proponowany system automatyzuje przetwarzanie chmur punktów 3D przy użyciu hybrydowej metody segmentacji (RANSAC i DBSCAN) oraz ulepszonych wzorów geometrycznych do obliczania tabeli pojemności w mililitrach. Wyniki obliczeń objętości i współczynników pojemności porównano z alternatywnym oprogramowaniem przedsiębiorstwa, co wykazało wzrost dokładności o 5–15% i skrócenie czasu przetwarzania o 70–80%. Opracowane oprogramowanie dostosowuje się do deformacji zbiorników, zapewniając niezawodność w warunkach przemysłowych, co potwierdza analiza danych dla 10 zbiorników o gęstości chmury wynoszącej 5–15 milionów punktów.

2

Wzorcowanie mierników jakości energii klasy A

Pniewski Michał

Wiadomości Elektrotechniczne

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2025

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R. 93, nr 2

3--7

PL

Niniejszy artykuł jest próbą odpowiedzi na najczęściej stawiane pytania dotyczące wzorcowania analizatorów jakości energii elektrycznej (AJEE). W artykule przedstawiono wybrane zagadnienia dotyczące wzorcowania mierników jakości klasy A określonej w normie PN-EN 61000-4-30 [7]. Omówiono zasady zachowania spójności pomiarowej oraz dotyczące zasady wzorcowania przyrządów pomiarowych w zakresie metrologii prawnej i w zakresie działalności akredytowanych laboratoriów wzorcujących. Szczegółowo pokazano zakres wzorcowania AJEE w akredytowanym laboratorium wzorcującym. Przedstawiono zagadnienie zmiany oprogramowania układowego i jego wpływu na ważność świadectwa wzorcowania AJEE

EN

This article is an attempt to answer the most common questions concerning the calibration of power quality analysers (AJEE). This article presents selected issues related to the calibration of class A quality meters specified in PN-EN 61000-4-30 [7]. The principles of maintaining measurement traceability were discussed. The principles concerning the calibration of measuring instruments in the scope of legal metrology and the scope of activity of accredited calibration laboratories were presented. The scope of AJEE calibration in an accredited calibration laboratory was discussed in detail. The issue of changing the firmware and its impact on the validity of the AJEE calibration certificate was discussed.

3

Analiza problematyki wzorcowania maszyn udarowych

Jóźwik Jarosław

Przegląd Elektrotechniczny

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2025

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R. 101, nr 8

144--149

PL

Aby zapewnić spójność pomiarową podczas badań udarów mechanicznych należy wywzorcować maszynę udarową (jej część pomiarową), co wiąże się m. in. z określeniem jej kluczowych parametrów i oceną niepewności pomiaru. Artykuł przedstawia czy i w jakim stopniu rozwiązują tę problematykę normy międzynarodowe (ISO) oraz dodatkowo normy chińskie (zwłaszcza norma JJF 1943-2021), publikowane wyłącznie w języku chińskim, przez co nie są szeroko znane ani stosowane na rynkach międzynarodowych.

EN

In order to ensure measurement consistency during testing, the shock machine (its measuring part) must be calibrated, which involves, among other things, determining its key parameters and assessing measurement uncertainty. The article presents whether and to what extent these issues are solved by international standards (ISO) and additionally by Chinese standards (especially the JJF 1943-2021 standard), published only in Chinese, which is why they are not widely known or used on international markets.

4

Praktyczne aspekty nadzoru nad wyposażeniem laboratorium badawczego

Chuda-Kowalska Monika

Przegląd Budowlany

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2025

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R. 96, nr 2

22--25

PL

W artykule, po krótkim wprowadzeniu do zagadnień metrologii, omówiono praktyczne aspekty zarządzania sprzętem pomiarowym w kontekście wymagań normy ISO/IEC 17025 [1]. Przedstawione zostały metody doboru, walidacji i kwalifikacji wyposażenia, a także strategie jego monitorowania i zarządzania. Szczególną uwagę poświęcono kwestii zachowania spójności pomiarowej oraz analizie ryzyka związanego z eksploatacją sprzętu. Ponadto przedstawiono przykład wdrożenia systemu zarządzania i nadzoru nad wyposażeniem w laboratorium badawczym posiadającym akredytację. Całość zamyka krótkie podsumowanie.

EN

The article begins with a concise introduction to metrology, followed by a focus on the practical aspects of measurement equipment management in accordance with the requirements of ISO/IEC 17025 [1]. It discusses methods for selecting, validating, and qualifying equipment, as well as strategies for its monitoring and management. Particular attention is given to ensuring measurement consistency and analyzing risks associated with equipment operation. Additionally, an example of the implementation of a management and supervision system for equipment in an accredited testing laboratory is presented. The article concludes with a brief summary.

5

Proposal of method dosimetry to realize in-vivo measurements in skin surface brachytherapy

Janiak Przemysław, Peszyńska-Piorun Magdalena, Kozłowski Sławomir, Albiniak Łukasz

Polish Journal of Medical Physics and Engineering

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2025

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Vol. 31, Iss. 4

313--318

EN

Introduction: Skin surface brachytherapy is a highly targeted radiation therapy used for treating superficial malignancies, offering precise dose delivery with minimal impact on surrounding healthy tissues. However, in-vivo dose verification remains a critical challenge in brachytherapy. Thermoluminescent dosimeters (TLDs) provide a promising solution for increased precision of dose delivery to cancer patients. This study proposes a TLD-based method to assess radiation exposure during skin surface brachytherapy, with a particular focus on TLDs calibration process and validation leading to the opportunity to reduce dose of radiosensitive structures such as the lens of the eye. Materials and Methods: TL detectors were calibrated using both an Iridium-192(192Ir) source and a 6 MV photon beam, incorporating correction factors to enhance measurement accuracy. During measurements, TLDs were positioned on the skin surface of the anthropomorphic head phantom to absolute point dose measurements. The measured TLD doses were compared with treatment planning system (TPS) calculations to validate the proposed method. Additionally a specific analysis was conducted to compare the radiation exposure of the eye lens with and without the use of a protective eye shield with use of the anthropomorphic head phantom. Results: TLDs response to a uniform radiation dose were within the range of ±10% of the mean. For the method of calibration used 6MV photons from medical linear accelerator, a value 3% for the energy correction factor was applied to account for the difference in sensitivity of the TLDs in 192Ir and 6MV. For both calibration methods, with used appropriate calibration factors, obtained dose values for the anthropomorphic head phantom were within ±5% of the TPS dose values. The use of a lead shield placed in the phantom’s eye socket reduced the dose to the eye lens by up to 20%. Conclusions: The developed TLD dosimetry method provides a precise and reliable approach for in-vivo dose verification in skin surface brachytherapy. By integrating calibrated TLD-based measurements, the correct implementation of radiotherapy plans can be verified. The study also confirms the protective efficacy of an eye shield in minimizing radiation exposure to the lens, reinforcing the importance of shielding strategies in clinical practice. Further validation and clinical implementation will contribute to improved patient safety and therapeutic outcomes in brachytherapy.

6

The importance of measurement uncertainty during gauge block calibration in determining compliance with specifications

Stępień Krzysztof, Świderski Jacek, Makieła Włodzimierz

Metrology and Measurement Systems

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2025

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Vol. 32, nr 2

art. no. 2, 1--15

EN

This article deals with selected problems related to the calibration of gauge blocks. It describes basic terms and definitions concerning principles of determining the conformity of calibration results with specifications, such as measurement uncertainty and measurement traceability. The requirements for laboratories accredited according to ISO/IEC 17025:2017 were discussed that are related to the declaration of compliance with the specification. Guidelines are given on decision rules and compliance principles based on ILAC-G8:09/2019 and JCGM 106:2012 in terms of the guard bands used and the associated risks of making an erroneous decision and the application of two decision rules: binary and nonbinary. The presented problems were supported by an analysis regarding calibration of the gauge blocks by the interferometric and comparative methods with regard to measurement uncertainty and deviations of the length in relation to the nominal length for individual grades in accordance with ISO 3650:1998. As the theoretical analysis has shown, there are no sources in the literature that would allow one to assess the risk of making the wrong decision during the calibration of gauge blocks. Therefore, the authors believe that the results presented in this paper will be of interest both to researchers dealing with the problem of estimating measurement uncertainty and to the staff of measurement laboratories.

7

Calibration of Weigh-In-Motion systems - metrological assessment of methods for determining reference values

Sroka Ryszard, Gajda Janusz, Burnos Piotr, Daniol Mateusz, Kania-Markocka Anna, Slusarski Wiktor, Ziolkowski Robert, Strzalka Piotr

Metrology and Measurement Systems

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2025

|

Vol. 32, nr 2

art. no. 5, 1--15

EN

The increasingly common practical application of systems for the dynamic weighing of vehicles in motion makes necessary periodic assessment of correct operation of such systems and calibration of the results obtained from them. This paper presents an experimental study and the obtained measurement results which allow for the determination of reference values essential for the calibration process. It was assumed that Weigh-In-Motion (WIM) systems will be calibrated using the pre-weighed vehicle method. The desired reference values in this case are thus gross weight (Gross Vehicle Weight - GVW) and static load of individual test vehicle axles used in the calibration process. The experiments and analysis of results obtained from them presented in this work involve the use of a platform scale for determination of GVW, as well as portable scales or a dynamic low-speed scale (LS-WIM), intended for measurement of the loads of individual axles of vehicles. All of the scales used in the experiments have valid certificates of metrological approval. The results obtained indicate the possibility of significant simplification of the procedure while still maintaining the required accuracy. The simplification proposed involves the possibility of abandoning the GVW measurement on the platform scale, instead determining this value by summing up the load measurements of all the vehicle’s axles obtained on the LS-WIM scale.

8

Enhancing mobile eye-tracking in extreme urban lighting conditions

Rusnak Marta, Koszewicz Zofia, Hackemer Franciszek, Garaszczuk Izabela, Duchowski Andrew T., Karnicki Rafał

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2025

|

Vol. 73, nr 6

art. no. e152709

EN

One of the methods for understanding residents’ needs and socially improving urban spaces in terms of transportation, safety, landscape protection and managing tourist traffic load is eye-tracking (ET). Researchers using mobile ET for outdoor studies face significant challenges, particularly due to sunlight affecting data quality. Existing solutions often overlook participant comfort. This article introduces a novel accessory designed for extreme lighting conditions, such as bright days, sunsets and snowy or water-filled environments. The goal is to eliminate disruptions caused by uncontrolled sunlight on participants’ eyes, and to enable studies in urban environments. A custom sun shield, designed for ETs based on spectacle frames, prioritizes both physical and psychological comfort. The lightweight shield is easy to install, minimally restricts the field of view, and does not interfere with eye-tracking components. It is cost-effective and suitable for DIY 3D printing. Control studies and field research confirmed its effectiveness, with feedback from over 100 users improving the final design. The shield enhances eye-tracking research credibility under sunny conditions, supports efficient calibration, and improves participant recruitment and well-being. The quality of data obtained has improved significantly, which is manifested by a comparison of date concerning the manner of pupil detection. Thanks to this solution, it will become possible to conduct research aimed at better understanding the behavior of city users, while ensuring their comfort and safety. It will also be possible to conduct research within the framework of so-called living labs. Importantly, studies show that the approach to designing subsequent mobile ETs based on IR should undergo significant modification.

9

Radiochromic film calibration with photon, electron and proton beams - Interchangeability study

Spyra Adam, Skwira-Chalot Izabela, Bałamut Marta, Benisz Klaudia, Matulewicz Joanna, Matulewicz Tomasz, Półtorak Michał, Rydygier Marzena, Sękowski Przemysław, Taranienko Agata, Ziemba Katarzyna

Bio-Algorithms and Med-Systems

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2025

|

Vol. 21, no 1

71--78

EN

Objective: This study aimed to evaluate the feasibility of calibrating radiochromic films using different types of radiation. By comparing photon, electron and proton beams, we assessed whether calibration can be performed without relying on clinically restricted medical beams. Methods: Radiochromic films were irradiated with photon, electron and proton beams, each delivering a fixed dose in the 1-14 Gy range. The response of three colour channels - red, green and blue - was analysed. Calibration curves were established for each channel, and their sensitivity and consistency across different beam types were compared. Results: Among the three channels, the green fraction showed the highest sensitivity to ionising radiation. Its intensity calibration was consistent across all investigated beam types, indicating that the response of the green channel is independent of the radiation quality. Conclusions: Radiochromic film calibration can be reliably performed using photon, electron or proton beams. Since the green channel provides stable and reproducible results, any of these radiation sources can be used for calibration. This finding removes the need for exclusive access to clinical medical beams, simplifying the calibration process and improving accessibility for research and quality assurance applications.

10

Calibration of microscopic traffic simulation of urban road network including mini-roundabouts and unsignalized intersection using open-source simulation tool

Yavuz Mehmet Nedim, Özen Halit

Zeszyty Naukowe. Transport / Politechnika Śląska

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2024

|

z. 122

305--318

EN

Microscopic traffic simulation models offer an effective way to analyze and assess different transportation systems thanks to their efficiency and reliability. As traffic management issues become more prevalent, notably in urban areas, simulation tools enable a significant opportunity to replicate real-world conditions before implementation. Therefore, the calibration of traffic simulation models plays a substantial role in obtaining accurate and confidential results. Nowadays, urban regions are facing the challenge of restricted space for developing traffic solutions. As a consequence of environmental restrictions, the use of mini-roundabouts rather than larger roundabouts is increasing. Based on the given literature review, it is seen that not much attention was given to the complex modeling and calibration of microsimulation models of mini-roundabouts and unsignalized intersections. The objective of this study is to offer the calibration of microscopic traffic simulation of urban road network, including closely located mini-roundabouts and unsignalized intersection. To this end, an open-source tool called SUMO (Simulation of Urban Mobility) was utilized as a simulation environment in this study. The necessary data for developing a microsimulation model in SUMO was gathered using a videography technique. The traffic count data and speed were considered performance measures between field observations and simulation outputs. The routeSampler tool of SUMO, which has recently emerged in the literature, was used to match traffic count data and the corresponding time interval for traffic volume data calibration. The calibration of car-following model parameters using a trial-and-error approach was employed based on mean absolute percent error (MAPE) between simulated speeds and field-measured speeds. According to the findings of the study, the simulation model fulfilled the calibration aims of the FHWA guideline and is suitable for further research.

11

Procedura ograniczająca niepewność wzorcowania przyrządów na 50 m komparatorze interferencyjnym GUM

Wiśniewski Mariusz

Przegląd Elektrotechniczny

|

2024

|

R. 100, nr 12

77--80

PL

50 m komparator interferencyjny Głównego Urzędu Miar umożliwia wzorcowanie przymiarów, interferometrów, dalmierzy laserowych, tachimetrów oraz laser trackerów. Przedstawiona została analiza czynników mechanicznych, środowiskowych oraz odczytowych wpływających na niepewność pomiarów. Przygotowana została procedura wzorcowania tachimetrów geodezyjnych. W ramach projektu EMPIR 20IND02 DynaMITE wykonano testy wielokolorowego absolutnego dalmierza laserowego.

EN

The 50 m interference comparator at Central Office of Measures enables calibration of steel tapes, interferometers, EDMs, total stations and laser trackers. An analysis of mechanical, environmental, and line detection factors influencing measurement uncertainty is presented. A procedure for calibrating geodetic total stations, has been prepared. Tests of a multicolor laser ADM were performed as part of the EMPIR 20IND02 DynaMITE project.

12

Diagnostyka systemów podwieszeń mostów

Hawryszków Paweł

Mosty

|

2024

|

nr 1

25--28

PL

Artykuł opisuje badania dynamiczne przeprowadzone na systemie podwieszenia mostu Rędzińskiego we Wrocławiu przez międzynarodowy zespół naukowy w ramach projektu Narodowej Agencji Wymiany Akademickiej (NAWA).

EN

The stay cable system of the Rędziński Bridge in Wrocław was the subject of dynamic testing carried out in 2019 by a 6-person international scientific team as a part of a bilateral exchange of scientists between the Republic of Poland and the Portuguese Republic. The testing was conducted within the project “Dynamic monitoring of bridge structures”, funded by the Polish National Agency for Academic Exchange (NAWA) and the Fundacao para a Ciencia e a Tecnologia (FCT) in Portugal. In this paper, the results of measurements carried out by the Polish team are presented. Dynamic measurements and the Structural Health Monitoring system of the bridge were used for the purpose of this study. The aim of the analysis was to determine the tension forces of the stay cables by using the indirect method of measurements and to compare the results with the data directly imported from the bridge monitoring system. 20 monitored stay cables were selected for dynamic investigation. In general, the values of tension forces determined by dynamic methods were higher than those derived from the monitoring system. This may be connected with the necessity to calibrate the force sensors installed in the stay cables. Some of the force sensors in the SHM system are inactive (no measurement data available) and need to be replaced.

13

Stability and predictability of Zener reference voltage standards: long-term experience by the Lithuanian National Metrology Institute

Bartašiūnas Andrius, Miškinis Rimantas, Smirnov Dmitrij, Urba Emilis

Metrology and Measurement Systems

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2024

|

Vol. 31, nr 2

431--449

EN

The Lithuanian national standard of voltage is maintained as the basis for calibration and measurement capabilities of Lithuania published in the Key Comparison Database of the International Bureau of Weights and Measures (BIPM). The stability and uncertainty of the voltage value measurements, performed since 2004 using the calibrated values of the Zener solid-state voltage standards (zeners) to predict their future behavior, are discussed. Conclusions regarding short- and long-term predictability of their behavior, which can be used for choosing an appropriate calibration period, are presented. An estimate of merit for approximations is proposed; based upon the estimate, it is concluded that the hyperbolic approximation is the best one in the most of the cases. Also discussed is the behavior of voltage dividers used in the zeners as well as the recovery of the zeners after a failure of their power supply. It is concluded that the voltage standards operated by the Lithuanian National Electrical Standards Laboratory feature stable drift of the voltage reproduced, which is well predictable by means of linear or non-linear regression.

14

Calibration of a background-oriented schlieren (BOS) imaging based on the light deflection angle of a wedge prism

Sasono Margi, Sakti Setyawan P., Noor Johan A. E., Soetedjo Hariyadi

Metrology and Measurement Systems

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2024

|

Vol. 31, nr 1

23--35

EN

The background oriented schlieren (BOS) imaging relies on measuring the light deflection angle in proportion to the refractive index gradient due to the change in the density of a medium. BOS imaging is sensitive to light deflection, and the quantitative measurement requires a reliable calibration method. It is convenient to calibrate the BOS based on the measurement of light deflection. All current BOS calibrations use the random dot as the background and digital image correlation (DIC) as the processing algorithm. Such calibrations can induce an inaccurate measurement. This paper proposes a new method to calibrate the BOS based on measuring a known light deflection angle of a wedge prism. The proposed method uses a fringe pattern instead of the random-dot and works based on phase demodulation. The fringe patterns are phase modulated by the wedge prism (the schlieren object). The demodulation utilizes the Hilbert transform (HT) on the BOS images, giving the phase difference of the images. The BOS converts the phase difference into the deflection angle. The calibration relies on the deviation of the angle measured by the BOS with the known angle of a wedge prism. The results show that the measurement accuracy of the BOS can achieve more than 95%. This result shows high accuracy in measuring the light deflection angle. Also, the proposed method is more accurate than other methods, and fringe patterns outperform random dot patterns in BOS imaging. Soon, this proposed calibration method can be adopted to validate the instruments for measuring the physical properties of a transparent medium in two-dimensional (2-D) visualization, in a contactless and non-intrusive manner.

15

Monitoring rolling bearings - sensor calibration concept based on standards and research

Bernaciak Paweł, Stępień Krzysztof

Mechanik

|

2024

|

R. 97, nr 8-9

44--48

EN

The article presents a discussion of the importance of analyzing rolling bearing vibrations in industry, emphasizing this parameter as a crucial element in quality control. A review of the literature suggests the need for further advancement in mathematical models and measurement systems, with an increased emphasis on sensor calibration. Although standards such as ISO 15242 regulate the measurement process, they lack detailed specifications for sensor mounting and calibration. The article identifies gaps in the standards regarding precise sensor positioning and calibration, emphasizing the need for further research and development of measurement setups. The proposed studies aim to improve the accuracy and reliability of rolling bearing vibration measurements in industrial practice.

PL

Artykuł omawia znaczenie analizy drgań łożysk tocznych w przemyśle, wskazując ten parametr jako główny w ocenie jakości. Przegląd badań literaturowych ujawnia potrzebę rozwinięcia modeli matematycznych i systemów pomiarowych, z naciskiem na kalibrację czujników. Normy, takie jak ISO 15242, regulują sposób pomiaru, ale nie precyzują szczegółowych wymagań dotyczących mocowania i kalibracji czujników. Artykuł wskazuje na luki w normach dotyczących precyzyjnego ustawienia i kalibracji czujników, podkreślając potrzebę dalszych badań i rozwoju stanowisk pomiarowych. Proponowane badania mają na celu poprawę dokładności i niezawodności pomiarów drgań łożysk tocznych w praktyce przemysłowej.

16

The calibration of sharp-crested weirs with a horizontal edge used for measuring flows in partially full pipes

Kubrak Janusz, Kubrak Elżbieta, Binio Joanna E.

Journal of Water and Land Development

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2024

|

no. 60

24--31

EN

This paper presents the results of a laboratory study on the discharge capacity of sharp-crested weirs fitted with a horizontal edge in pipes during open-channel flow conditions and clean water used to measure the outflow. Such sharp-crested weirs are mounted in pipes and are used to control the inflow to separators. The stream profile does not correspond to the profile given by Bazin for sharp crested weirs in channels. A desired location of the water level measurement point for flow rate calculations was provided. Discharge curves were identified for three sharp-crested weirs of 0.0465, 0.0634 and 0.0771 m in height, installed in the pipe of 0.1534 m in diameter and inclinations of 0.5 and 1.0%. The discharge curves for weir flow with free nappe does not show a significant effect of the pipe slope on the weir discharge capacity. The non-dimensional formulas for the discharge capacity of the sharp-crested weir were found as general polynomial regressions. The results indicate that the calibrated sharp-crested weir with a horizontal edge placed in a pipe can be used to control the flow. Due to the scale effect, relationships obtained from the calibration cannot be generalised to other pipe diameters and weirs heights than those analysed.

17

The analysis of the metrological properties of contact temperature measurement with the use of selected statistical methods

Michalski Dariusz, Maciejewska Beata, Piasecka Magdalena, Dadas Norbert, Piasecki Artur

International Journal of Electronics and Telecommunications

|

2024

|

Vol. 70, No. 3

627-634

EN

In this study, the uncertainty of measurement paths was estimated using selected statistical methods. Specifically, temperature measurements obtained from contact temperature sensors used in a heat transfer test section were investigated. The experiments utilized a dry-well temperature calibrator, thermoelements (types K, J, N, and T), and a data acquisition station. Additionally, a certified Pt-100 resistance sensor connected to the temperature meter was considered during measurements. The temperature range for the selected measurement points was 0.3 to 100 °C, covering both increasing and decreasing temperatures. To calculate the expanded uncertainty, both the uncertainty propagation method and the Monte Carlo method were employed. The results were analyzed and found to be similar.

18

Koncepcja stanowiska laboratoryjnego do kalibracji ciśnieniomierzy sprężynowych

Olak Damian, Ciechulski Tomasz

Elektronika : konstrukcje, technologie, zastosowania

|

2024

|

Vol. 65, Nr 12

20--26

PL

Artykuł powstał na podstawie pracy końcowej, realizowanej przez studenta studiów podyplomowych na Wydziale Elektroniki Wojskowej Akademii Technicznej. W artykule przedstawiono dwie koncepcje stanowiska do kalibracji ciśnieniomierzy sprężynowych w Wojskowym Ośrodku Metrologii w Bydgoszczy. W skład stanowiska pomiarowego według koncepcji pierwszej wchodzi wzorzec ciśnienia (ciśnieniomierz elektroniczny), prasa manometryczna, kamera, komputer oraz ciśnieniomierz kalibrowany. Koncepcja druga dotyczy zastosowania kontrolera ciśnienia (brak konieczności stosowania oddzielnej prasy manometrycznej). Obie koncepcje zostały przeanalizowane pod kątem ich opłacalności i możliwości zastosowania w praktyce.

EN

The article is based on the postgraduate diploma thesis by a student at the Faculty of Electronics, Military University of Technology. The article presents two concepts of a spring pressure gauge calibration stands at the 2nd Military Metrology Centre in Bydgoszcz. The laboratory stand according to the first concept consists of a pressure standard (electronic pressure gauge), a manometric press, a camera, a computer and a calibrated pressure gauge. The second concept concerns the use of a pressure controller (no need to use a separate manometric press). Both concepts were analysed in terms of their cost-effectiveness and practical application.

19

Kinematic calibration of a lightweight manipulator for medical applications

Arent Krzysztof, Kurnicki Adam, Portasiak Piotr, Stańczyk Bartłomiej

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2024

|

Vol. 72, nr 6

art. no. e151381

EN

The paper presents a kinematics calibration procedure for a lightweight manipulator designed for medical applications. They comprise improving the dexterity of a dysfunctional arm of a handicapped patient in an electric wheelchair as well as supporting biopsies and surgeries. Consequently, there are several manipulator distinguishing features of the manipulator design that are relevant to kinematics calibration. In particular, these are: a small area in the workspace within which the end-effector operates, affordability for non-commercial users, a delicate, dexterous design. In this context we propose a specialized procedure that features a low cost calibration tool enabling the end-effector to reach the correct positions for data acquisition. The key parameters of the calibration tool were obtained by applying two techniques of numerical analysis, workspace clustering and arbitrary choice, and subsequent experimental verification. The procedure exploits classical results concerning the kinematics calibration and is empirically verified by comprehensive simulation and experimental studies.

20

Calibration of PALS System with CRM Materials for Biomedical Studies

Kubat Karol, Kapłon Łukasz, Moskal Paweł, Stępień Ewa

Bio-Algorithms and Med-Systems

|

2024

|

Vol. 20, Special issue

35--39

EN

Objective and method: Positron annihilation lifetime spectroscopy (PALS) is a powerful technique in material science that allows the investigation of the properties and behavior of positrons in various materials. PALS can be used to investigate solid structures at the nanometer scale and enable the use of positronium properties as an additional diagnostic parameter. Here we present results from calibration of the PALS system with certificated reference materials (CRM). Materials: Source of 22Na covered with layer of Kapton film, and after that parafilm from both sides was used in all experiments. Certified materials of No_5602-a (polycarbonate) and No_5601-a (fused silica) were used to ascertain if parameters were correctly identified. Results: In an experiment three lifetime components were correctly identified. All of those components will always be present in the data in further experiments on biological samples. Lifetime components consist of: 196 ps for annihilations in AI an aluminium cover of the chamber, 386 ps for annihilations in thesource and in the Kapton foil, 463 ps for reactions with parafilm. Conclusions: These parameters will be further used to correctly identify positron lifetimes in biological samples. Recently, a new method for imaging of positronium properties was invented and the first in-vivo images of positronium lifetime in humans were demonstrated with the multi-photon J-PET scanner. In order to correlate the positronium properties in tissue with the medically useful parameters, and to translate positronium imaging to clinics, comprehensive research of positronium properties in biological samples is needed.