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Wyszukujesz frazę "precision measurement" wg kryterium: Temat

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Measurement Precision Under Repeatability Conditions of a Batch of Sound Power Assessment for Blenders in Reverberation Room
    Autorzy:
    Costa-Felix, R. P. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/177133.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metrology
    measurement precision
    sound power assessment
    reverberation room
    Opis:
    A set of sound power assessments was performed to determine measurement precision in specified conditions by the comparison method in a reverberation room with a fixed position array of six microphones. Six blenders (or mixers) and, complementary, a reference sound source were the noise sources. Five or six sound power calculations were undertaken on each noise source, and the standard deviation (sr) was computed as “measurement precision under repeatability conditions” for each octave band from 125 Hz to 8 kHz, and in dB(A). With the results obtained, values of sr equal 1.0 dB for 125 Hz and 250 Hz, 0.8 dB for 500 Hz to 2 kHz, and 0.5 dB for 4 kHz and 8 kHz. Those can be considered representative as sound power precision for blenders according to the measurement method used. The standard deviation of repeatability for the A-weighted sound power level equals 0.6 dB. This paper could be used for house or laboratory tests to check where their uncertainty assessment for sound power determination is similar or not to those generated at the National Metrology Institute.
    Źródło:
    Archives of Acoustics; 2016, 41, 3; 591-597
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metrological Analysis Of Microsoft Kinect In The Context Of Object Localization
    Autorzy:
    Skalski, A.
    Machura, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/221384.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Kinect motion sensor
    localization
    camera calibration
    measurement precision
    robustness
    Opis:
    This paper presents a comprehensive metrological analysis of the Microsoft Kinect motion sensor performed using a proprietary flat marker. The designed marker was used to estimate its position in the external coordinate system associated with the sensor. The study includes calibration of the RGB and IR cameras, parameter identification and image registration. The metrological analysis is based on the data corrected for sensor optical distortions. From the metrological point of view, localization errors are related to the distance of an object from the sensor. Therefore, the rotation angles were determined and an accuracy assessment of the depth maps was performed. The analysis was carried out for the distances from the marker in the range of 0.8-1.65 m. The maximum average error was equal to 23 mm for the distance of 1.6 m.
    Źródło:
    Metrology and Measurement Systems; 2015, 22, 4; 469-478
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Material model and revealing the truth
    Autorzy:
    Czarnecki, L.
    Sokołowska, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/202439.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    material model
    analytical modelling
    numerical modelling
    modeling
    computational tool
    optimization
    accuracy measurement
    precision measurement
    modelowanie analityczne
    modelowanie numeryczne
    modelowanie
    narzędzie obliczeniowe
    optymalizacja
    dokładność pomiaru
    precyzja pomiaru
    Opis:
    The paper refers to the approach used in science, specifically in building materials engineering, assuming the possibility of material modeling, including modeling of the technical characteristics of building materials of various compositions as well as modeling phenomena/processes that occur during the use of materials and structures made from them. The authors analyze the merits of the approach of modeling in the context of compliance computational models to reality, consider the significance of the selection of the proper model (type of mathematical function, number of input data) which should be based on the knowledge of modeled material or phenomenon and later adequate verification of the model. The authors also underline importance of proper interpretation of results obtained by calculation. Misrepresentation may result in a misstated model of the studied phenomenon and lead to incorrect conclusions, which puts the researcher far from the truth, that he or she should always seek for.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 1; 7-14
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement System for Assesment of Motor Cylinder Tolerances and Roundness
    Autorzy:
    Jermak, C. J.
    Dereżyński, J.
    Rucki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/220758.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    precision
    measurement
    accuracy
    roundness
    automation
    Opis:
    The paper describes the concept of a novel measurement system designed for quick and inexpensive measurement of tolerances and assessment of roundness, especially suitable for the motor industry. The structure of measurement system and its algorithm of measurement data analysis are described in detail. The system underwent tests with the setting (master) rings of known tolerances and out-of-roundness. The results were compared with those obtained from the reference device PIK-2. The tested system exhibited a very good accuracy and proved to be a good measurement tool. It was implemented in the industrial enterprise.
    Źródło:
    Metrology and Measurement Systems; 2018, 25, 1; 103-114
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A 128-channel high precision time measurement module
    Autorzy:
    Kang, L.
    Zhao, L.
    Zhou, J
    Liu, S.
    An, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/221564.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high precision
    time measurement
    PXI
    data transfer
    commissioning tests
    Opis:
    In the external target experiment for heavy ion collisions in the HIRFL-CSR, Multi-Wire Drift Chambers are used to measure the drift time of charged particles to obtain the track information. This 128-channel high precision time measurement module is designed to perform the time digitization. The data transfer is based on a PXI interface to guarantee a high data rate. Test results show that a 100 ps resolution with a data transfer rate up to 40 MBps has been achieved; this module has also been proven to function well with the detector through a commissioning test.
    Źródło:
    Metrology and Measurement Systems; 2013, 20, 2; 275-286
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comprehensive cycloid pin-wheel precision reducer test platform integrated with a new dynamic measurement method of lost motion
    Autorzy:
    Yue, Huijun
    Wu, Xiangkai
    Shi, Zhaoyao
    Zhang, Yue
    Ye, Yong
    Zhang, Lintao
    Fu, Ying
    Powiązania:
    https://bibliotekanauki.pl/articles/2052087.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cycloid pin-wheel precision reducer
    RV reducer
    test platform
    comprehensive performance
    dynamic measurement of lost motion
    decomposition test method
    Opis:
    While cycloid pin-wheel precision reducers (referred to as RV reducers) are widely used in industrial robots, a widely accepted design standard or verification method of their test platforms is not available. In this study, a comprehensive sliding-separation test platform of RV reducers was developed. The test platform can test various measurement items such as transmission error, static measurement of lost motion, dynamic measurement of lost motion, torsional rigidity, no-load running torque, starting torque, backdriving torque, and transmission efficiency of the RV reducer for robots. The principle and method of dynamic measurement of lost motion tests based on the two-way transmission error method were studied and this test function was successfully integrated with the comprehensive test platform in order to increase the test items of the dynamic performance parameters of RV reducers. The measurement results of the no-load running torque of the RV reducer were consistent with the Stribeck curve. Based on the concept of optimal measurement speed, a decomposition test method of the geometric component of the dynamic measurement of lost motion and the elastic component of the dynamic measurement of lost motion was proposed in the dynamic measurement test of lost motion. Through precision calibration, function test and repeatability test, the results were compared with the data of enterprise’s samples. The consistent results have proved that the test platform met engineering requirements and measurement accuracy requirements. Based on the new test principle, the developed platform can test more parameters of RV reducers with high precision and display the comprehensive test performance.
    Źródło:
    Metrology and Measurement Systems; 2022, 29, 1; 207-229
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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