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    Wyświetlanie 1-7 z 7
    Tytuł:
    Method for predicting the accuracy of rotational elements measurements using the five-axis coordinate measuring system
    Autorzy:
    Gaska, P.
    Gruza, M.
    Harmatys, W.
    Gaska, A.
    Sladek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/99483.pdf
    Data publikacji:
    2018
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    accuracy
    coordinate measuring systems
    probing systems
    Opis:
    The measurements of solids of revolution are one of the most common task in industrial practice. Therefore it is not surprising, that new solutions dedicated to improve accuracy and acceleration of measurements of rotational components are emerging. In this group, the new generation of articulating probing systems (with ability of continuous indexation) is worth mentioning. These probing devices combined with standard CMM forms the five-axis coordinate system. Such solution results in measurements acceleration and also improve measurement repeatability. Studies on this type of probing systems proved that their accuracy depends strongly on the angular orientation of probing system used during measurement. Therefore authors developed model that allows simulation of probing system errors for any orientation. This article describes an attempt to use the model to find the configuration of the probing system that would provide the highest accuracy for rotational elements measurements. The simulation results are compared to the real measurements of standard elements performed on five axis measuring system. Described prediction method could have a beneficial effect on improving the accuracy of measurements and, as a result, on reducing production costs by minimizing the risk of erroneous decision on the conformity of products with their geometric specifications.
    Źródło:
    Journal of Machine Engineering; 2018, 18, 3; 78-86
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of the coordinate measuring systems accuracy
    Autorzy:
    Sladek, J.
    Gaska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/99798.pdf
    Data publikacji:
    2016
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    coordinate measuring systems
    modelling
    uncertainty
    accuracy
    Opis:
    Coordinate metrology determines nowadays the relevant directions of development in automated measuring systems and quality management in the field of machine industry. The essential problem of coordinate measuring technique application is the issue of accuracy assessment of performed measurements. This paper describes the development of coordinate systems modelling as a new field of assessing the accuracy of measurements carried out in a quasi-real time. The practical solutions of the so-called virtual machines and virtual measuring systems were described along with the results of their evaluation and validation methodology based on a comparison of obtained results with the results produced by the typical methods of coordinate measurements accuracy assessment.
    Źródło:
    Journal of Machine Engineering; 2016, 16, 3; 34-46
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of measurement uncertainty with the use of uncertainty database calculated for optical coordinate measurements of basic geometry elements
    Autorzy:
    Owczarek, D.
    Ostrowska, K.
    Harmatys, W
    Sładek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/101965.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    estimation of measurement uncertainty
    optical coordinate measuring systems
    Opis:
    The paper presents a method for estimating the uncertainty of optical coordinate measurement based on the use of information about the geometry and the size of measured object as well as information about the measurement system, i.e. maximum permissible error (MPE) of the machine, selection of a sensor, and also the required measurement accuracy, the number of operators, measurement strategy and external conditions contained in the developed uncertainty database. Estimation of uncertainty is done with the use of uncertainties of measurements of basic geometry elements determined by methods available in the Laboratory of Coordinate Metrology at Cracow University of Technology (LCM CUT) (multi-position, comparative and developed in the LCM CUT method dedicated for non-contact measurements) and then with the use of them to determine the uncertainty of a given measured object. Research presented in this paper are aimed at developing a complete database containing all information needed to estimate the measurement uncertainty of various objects, even of a very complex geometry based on previously performed measurements.
    Źródło:
    Advances in Science and Technology. Research Journal; 2015, 9, 27; 112-117
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The issue of determining the geometric position deviation of the threaded holes
    Autorzy:
    Martikáň, P.
    Drbúl, M.
    Holubják, J.
    Mrázik, J.
    Joch, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/957939.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    coordinate measuring systems
    location gages
    position deviation
    threaded holes
    Opis:
    The present article analyzes the specific measurement strategies (techniques) of contact measurement that are used to determine the position deviation of the threaded holes using 3D coordinate measuring system. Furthermore, there are analyzed direct and indirect (location gages) measurement techniques to determine position of the threaded holes and results of the measurements.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 32; 47-52
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie optycznych pomiarów współrzędnościowych w określeniu dokładności geometrycznej prototypów implantów czaszkowych wykonanych technologią RP
    The use of optical coordinate measurement for determining geometrical precision of cranial implants made by RP technology
    Autorzy:
    Kudasik, T.
    Markowska, O.
    Miechowicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/156689.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    optyczne współrzędnościowe systemy pomiarowe
    inżynieria odwrotna
    szybkie prototypowanie
    optical coordinate measuring systems
    reverse engineering
    rapid prototyping
    Opis:
    Artykuł przedstawia możliwości zastosowania optycznych systemów pomiarowych w określeniu dokładności geometrycznej prototypów implantów czaszkowych wykonanych technologią RP. Badania zostały przeprowadzone przy użyciu skanera optycznego Atos Triple Scan. Modelami badawczymi były prototypy implantów kości sklepienia czaszki wykonane w technologiach: SLA, FDM, PolyJet oraz 3DP. Przeprowadzona analiza pozwoliła jednoznacznie stwierdzić, że zastosowane technologie RP można zastosować w procesie uzupełniania ubytków kostnych sklepienia czaszki, ponieważ ich dokładność mieści się w zakresie ± 0,5mm, wystarczającej czaszkowej implantologii.
    The paper presents the possibilities of using optical coordinate measuring systems for determining the geometrical precision of cranial implants prototypes made by Rapid Prototyping technology. Section 2 provides the description of the prototypes of cranial bone implants made in SLA, FDM , 3DP and PolyJet technologies. This prototypes served as research models (Fig. 4). The Reverse Engineering process is also presented in Section 2. On the basis of the RE process the acquired data was used to reconstruct the numerical models of skull defects and their supplements (Figs. 1-3). The verification of the geometrical accuracy was based on measurements made with use of an optical scanner of GOM Com-pany - the Atos Triple Scan (Fig. 5). The description of the measurement process is provided in Section 3 (Figs. 6-9). The results are given in Section 4 (Figs. 10-13). After the research , it was found that the RP technologies could be applied to the process of filling individual cranial bone defects. Their accuracy is within ± 0.5 mm which is sufficient in the cranial implants. By matching the implant to the anatomical structures of a particular patient the improved treatment effects are achieved. In addition, the frequent need for repeated operations resulting from poor fit is eliminated. The benefits of an individual approach to specific medical cases, far outweigh the high cost associated with the manufacture of such implants.
    Źródło:
    Pomiary Automatyka Kontrola; 2014, R. 60, nr 4, 4; 195-198
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tomografia komputerowa w pomiarach geometrycznych 3D
    Computed tomography in 3D geometrical measurements
    Autorzy:
    Ratajczyk, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/151191.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    tomografia komputerowa-TC
    lampa rentgenowska
    promieniowanie X
    współrzędnościowa technika pomiarowa
    computed tomography CT
    detector
    coordinate measuring systems
    X-rays radiations
    rotary tables
    X-ray tube
    Opis:
    Istota pomiarów tomograficznych opartych na promieniowaniu rentgenowskim X. Budowa tomografów - główne zespoły i ich funkcje. Kalibracja tomografów. Prezentacja modelu tomografu opracowanego w Instytucie Metrologii i Inżynierii Biomedycznej.
    Computed tomography (CT), after its dynamical development for medical requirements recently starts to appear in an area of industrial applications. It enables not only to determine dimensions of objects made of metal, plastics and different kinds of composed materials but also to defect internal defects of the material. This paper describes concepts of CT measurements. The main construction units of tomographs are characterized and the examples of tomographs of different firms and their applications are given. The accuracy and calibration problems are also shortly discussed. At the and the concepts of home - made computed tomograph for industrial applications are also presented.
    Źródło:
    Pomiary Automatyka Kontrola; 2011, R. 57, nr 2, 2; 220-223
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of different probing systems used in articulated arm coordinate measuring machines
    Autorzy:
    Brau, A.
    Valenzuela, M.
    Santolaria, J.
    Aguilar, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/221100.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    articulated arm coordinate measuring machine
    probing systems
    self-centering active probe
    Opis:
    This paper presents a comparison of different techniques to capture nominal data for its use in later verification and kinematic parameter identification procedures for articulated arm coordinate measuring machines (AACMM). By using four different probing systems (passive spherical probe, active spherical probe, self-centering passive probe and self-centering active probe) the accuracy and repeatability of captured points has been evaluated by comparing these points to nominal points materialized by a ball-bar gauge distributed in several positions of the measurement volume. Then, by comparing these systems it is possible to characterize the influence of the force over the final results for each of the gauge and probing system configurations. The results with each of the systems studied show the advantages and original accuracy obtained by active probes, and thus their suitability in verification (active probes) and kinematic parameter identification (self-centering active probes) procedures.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 2; 233-246
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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