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    Wyświetlanie 1-6 z 6
    Tytuł:
    Influence of process parameters on dimensional accuracy of parts manufactured using fused deposition modelling technology
    Autorzy:
    Górski, F.
    Kuczko, W.
    Wichniarek, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/101920.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    rapid prototyping
    fused deposition modelling
    3D optical scanning
    manufacturing accuracy
    Opis:
    The paper presents the results of experimental study – part of research of additive technology using thermoplastics as a build material, namely Fused Deposition Modelling (FDM). Aim of the study was to identify the relation between basic parameter of the FDM process – model orientation during manufacturing – and a dimensional accuracy and repeatability of obtained products. A set of samples was prepared – they were manufactured with variable process parameters and they were measured using 3D scanner. Significant differences in accuracy of products of the same geometry, but manufactured with different set of process parameters were observed.
    Źródło:
    Advances in Science and Technology. Research Journal; 2013, 7, 19; 27-35
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of acceleration of different dynamic microobjects by the television scanning optical microscope
    Autorzy:
    Prudyus, I.
    Matiieshyn, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/114123.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    television scanning optical microscope
    microscope field of view
    acceleration of movement
    Opis:
    The acceleration of the dynamic microobjects (MO) movement, the motion of which is accelerated uniformly or non-uniformly is an important task for television measuring systems. Most existing measuring systems usually have a small range of acceleration with a short period of growth. Such period of growth of the acceleration is characteristic for many dynamic MO. Better instruments to determine the non-uniform velocity of the various objects are based on various laser devices. These instruments are contactless and high-speed enough. In the paper the basics of the television scanning optical microscope (TSOM) are presented. In the Chapter 2 the schematic diagram of the TSOM and its main functionalities are pointed out. In the Chapter 3 an adaptation of the TSOM for movement acceleration of microobjects is discussed. Modified structural and functional diagram of the instrument is presented.
    Źródło:
    Measurement Automation Monitoring; 2015, 61, 8; 410-412
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Signal-to-noise ratio improvement in scanning television optical microscope
    Autorzy:
    Prudyus, I.
    Shkliarskyi, V.
    Hudz, B.
    Rehush, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/114383.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    scanning television optical microscope
    cathode ray tube
    noise
    photomultiplier tube
    Opis:
    Scanning television optical microscope is designed to investigate microscopic objects, larger than 0.1 micrometers. To illuminate microobject with this microscope there is used a high resolution cathode ray tube. Low illumination of the tested microobject lets to explore living microorganisms in real time. The current microscopic image has low contrast. To increase image contrast it is necessary to increase microscope sensitivity. The main sources of noise in scanning television optical microscope are: 1) composite video shaper; 2) photomultiplier tube; and 3) scanning cathode ray tube. Detailed analysis of noise sources in video signal of the microscope is presented in the paper. Equations describing the sources are given. Dependencies are plotted and discussed.
    Źródło:
    Measurement Automation Monitoring; 2015, 61, 8; 406-409
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Weryfikacja wymiarowa pierwszej wypraski w systemie skanowania 3D
    Dimensional revision of the first moulded piece with 3D scanning system
    Autorzy:
    Śmierzchalski, D.
    Daniluk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/395669.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    skanowanie
    3D
    pomiar optyczny
    scanning
    optical measurement
    Opis:
    W pracy skupiono się na uzyskaniu pełnej informacji wymiarowej o wyprasce wtryskowej. Omówiono szczegółowo wpływ czynników zewnętrznych na dokładność pomiaru, wskazano również cechy wyrobu niekorzystnie z metrologicznego punktu widzenia. W dalszej części opisano zagadnienia modelowania, które pozwala skrócić czas opracowania narzędzi. Podsumowanie uzupełniono perspektywą rozwoju optycznych systemów skanowania 3D.
    This paper is focused on gathering full geometrical information about molding specimen. Details about the influence of environment end external factors on measuring accuracy are given, so as specimen features disadvantageous from metrological point of view. Next part refers to the problem of modeling that makes time of new molding tool work out much shorter. To sum up a possible, future researches on optical 3-D scanning systems is described.
    Źródło:
    Postępy Nauki i Techniki; 2011, 6; 113-119
    2080-4075
    Pojawia się w:
    Postępy Nauki i Techniki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Torsional Strength of Pa2200 Material Shape Additively with the Selective Laser Sintering Technology
    Autorzy:
    Bernaczek, Jacek
    Dębski, Mariusz
    Gontarz, Małgorzata
    Grygoruk, Roman
    Józwik, Jerzy
    Kozik, Bogdan
    Mikulski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2201927.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    torsional strength
    PA2200 powder
    additive manufacturing
    SLS technology
    SLS
    Selective Laser Sintering
    optical measurements
    3D scanning
    Opis:
    The purpose of the undertaken research work is to analyze the torsional strength of standard samples with a circular cross-section, produced additively using the SLS (Selective Laser Sintering) technique – sintering PA2200 polyamide powders. The studies conducted so far have not included a static torsion test, the results of which are crucial for parts such as machine shafts, hubs, couplings, etc. Hence the idea of conducting the research in question. The samples were made in different settings relative to the machine's working platform and subjected to post-processing in two variants – by water-soaking and furnace-heating – in order to determine the influence of the orientation of the model in the manufacturing process and the type of post-processing on torsional strength. The produced samples were additionally subjected to a preliminary dimensional and shape verification due to the significant impact of the accuracy of the models in the SLS process on the operation of the above-mentioned machine parts. Based on the analysis of the test results, it was found that the highest torsional strength was determined for the furnace-heated samples. In addition, the highest mapping accuracy was found for models positioned vertically in relation to the machine's working platform.
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 2; 12--24
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda rejestracji, przetwarzania i analizy obrazu do cyfrowego opisu powierzchni manekina
    The method of recording, converting and images analysis for digital model of phantom surface
    Autorzy:
    Lesiakowska-Jabłońska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/151392.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    analiza obrazu
    przetwarzanie obrazu
    skanowanie 3D
    cyfrowe modele obiektów 3D
    pomiarowe metody optyczne
    images analysis
    3D scanning
    digital model of 3D objects
    optical representation method
    Opis:
    Zapis powierzchni fantomów - manekinów (stosowanych powszechnie w odzieżownictwie fizycznych modeli budowy ciała ludzkiego o określo-nej uśrednionej charakterystyce wymiarowej) jest konieczny z punktu widzenia prac nad inżynierskimi metodami konstrukcji wykrojów odzieży. Potwierdzają to liczne prace z tego obszaru prowadzone przez szereg placówek naukowych i badawczych świata [1, 2, 3]. Dzięki badaniom prowadzonym w Katedrze Odzieżownictwa PŁ opracowano metodę fotogrametryczną pozwalającą na rejestrację, przetworzenie, analizę, opis cech wymiarowych i odwzorowanie 3D (three dimensional) powierzchni manekinów [4].
    Phantom surface representation based on computer analysis of phantom 2D images is a very challenging problem. The representation of phantom surface is necessary for development of engineering techniques for constructing shapes of clothes. The phantoms are widely used in clothing science as a model of human body. This is confirmed by large number of publications from many research institutes [1, 2, 3]. At the Clothing Department, Technical University of Łódź, the new method of digital representation of phantom surface was developed [4]. Thus optical representation method was used to obtain a digital phantom surface model. The indirect method of 3D surface measurement was proposed, where geometrical features of an analysed object were estimated based on analysis of series of its 2D images. The 2D image is a central projection of the analysed object. The most important problem is to register such a projection and then perform an appropriate analysis. To obtain a digital model of objects with size comparable to the human body, the measurement bench was assembled as shown in Fig. 1. This bench contains: analysed object (1); a projector (2) which is a source of two light half-planes (bright and dark); they are projected onto analysed object (1) and are called as "horizontal light half-plane"; a TV camera (9) as a video signal source for the computer (10); it is moved along with a projector during measurement process and it is at an angle ? in relation to light half-plane; two stepper motors (3, 4) with a driving system (5), used to move a camera (with Δζ step) and rotate a phantom (with an angle Δφ); mechanical circuit, which is used to move a camera and a projector; computer (10) used to control whole a system, equipped with two monitors (6, 7), add-on cards and specialised software; vertical reference half-plane, firmly fixed to measure a distance from the analysed object. This measurement bench was used for acquisition and analysis of images of investigated objects.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 9, 9; 44-47
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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