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Wyszukujesz frazę "hand vibration" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Wavelet Transfer Function in the Analysis of the Influence of a Palm Grip on Actual Vibrations of an Upper Limb
    Autorzy:
    Batko, W.
    Barański, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/90263.pdf
    Data publikacji:
    2007
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    wavelet analysis
    hand vibration
    Opis:
    Algorithms used to determine the vibrations to which hand–tool operators are exposed take into account only vibrations measured on a tool. Thus, the significant influence of constraints joining the elements of the tool–operator system is neglected. This paper attempts to determine the influence of grip on vibrations recorded both on the tool and on the limb. The estimation was based on the use of the wavelet transfer function, in which the analysis was done by filtration with wavelet functions. Signals recorded with the specially designed system were utilised in investigations.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 355-365
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Occupational Exposure to Mechanical Vibration: The Italian Vibration Database for Risk Assessment
    Autorzy:
    Nataletti, P.
    Marchetti, E.
    Lunghi, A.
    Pinto, I.
    Stacchini, N.
    Santini, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/90336.pdf
    Data publikacji:
    2008
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    hand-arm vibration
    whole-body vibration
    risk assessment
    vibration database
    Opis:
    The Italian vibration database is presented. It is hosted by a web server at the National Institute of Occupational Prevention and Safety (ISPESL) in Rome, Italy (http://www.ispesl.it/vibrationdatabase). It supports in risk assessment employers who have to comply with Legislative Decree 187/05, now replaced by Legislative Decree 81/08, which transposes into law Vibration Directive 2002/44/EC. The database currently contains measurements and EC-declared values from over 980 hand-held power tools (such as pneumatic and electric hammers, chainsaws, grinders, drills, sanders and saws) and from over 420 vehicles (such as buses, forklifts and wheel tractors). The database is continuously updated as soon as new experimental and declared data are acquired.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2008, 14, 4; 379-386
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Simultaneous Impact of Hand–Arm and Whole-Body Vibration
    Autorzy:
    Kowalski, P.
    Zając, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/91046.pdf
    Data publikacji:
    2012
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    vibrotactile perception
    hand-arm vibration
    whole-body vibration
    combined exposure
    Opis:
    This article presents the results of laboratory tests on the combined effect of whole-body vibration (WBV) and hand–arm vibration (HAV). The reactions of subjects exposed to various combinations of vibration were recorded. The vibrotactile perception threshold (VPT) test identified changes caused by exposure to vibration. Ten male subjects met the criteria of the study. There were 4 series of tests: a reference test and tests after exposure to HAV, WBV, and after simultaneous exposure to HAV and WBV. An analysis of the results (6000 ascending and descending VPTs) showed that the changes in VPTs were greatest after simultaneous exposure to both kinds of vibration. The increase in VPT, for all stimulus frequencies, was then higher than after exposure to HAV or WBV only.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2012, 18, 1; 59-66
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation and Optimization of Handle Design Parameters of a Grass Trimming Machine
    Autorzy:
    Mallick, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/89898.pdf
    Data publikacji:
    2008
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    grass trimming machine
    hand-arm vibration
    design parameters
    optimization
    D-shape handle
    Opis:
    The grass trimming machine is a widely used agricultural machine for cutting grass by the roadside and in other areas in Malaysia. Hand–arm vibration (HAV) syndrome is very common among workers operating power tools and performing similar work for extended periods. Grass trimming involves the use of a motorized cutter spinning at high speed, resulting in high levels of HAV among its operators. The existing D-shape handle causes HAV-related stress and operational load in operators. This research proposes a new design of a handle of the grass trimming machine. When this new design was compared with the old one, it was found that the new handle resulted in 18% lower HAV. To find the lowest HAV, 3 critical parameters of the new handle (length, angle and material of the cap of the handle) were optimized using the Taguchi quality tool. Appropriately selected parameters of the new handle significantly reduced the occurrence of HAV among grass trimmers.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2008, 14, 3; 343--349
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proposal for an Indexical Method of Evaluating Risk of Hand Tool Operators’ Exposure to Mechanical Vibrations
    Autorzy:
    Engel, Z.
    Kowalski, P.
    Zawieska, W. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/90780.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    hand-arm vibration
    tool
    feed force
    griping force
    drgania
    narzędzia ręczne
    zagrożenia zdrowia
    operator maszyn i urządzeń
    siła mięśni
    siła chwytania
    ręka
    Opis:
    The article presents proposals for an indexical evaluation of exposure of hand tool operators to vibrations. The presented indices have been developed on the basis of the results of laboratory tests. The examinations studied the effect of pressure force and grip force exerted by an operator on a hand tool as well as the amplitudes and frequencies of an exciting signal on vibrations transmitted in the hand-tool handle system.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 2; 183-194
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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