Comparing two methods of data collection for walkway friction measurements with a portable slip meter and a force platform |
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| Institution: | 1. Liberty Mutual Research Institute for Safety, 71 Frankland Road, Hopkinton, MA 01748, USA;2. Department of Occupational Safety, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, 00250 Helsinki, Finland;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. University of Chinese Academy of Sciences, Beijing 100039, PR China;1. Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, New York, USA;2. NYU Tandon School of Engineering, Department of Biomedical Engineering, New York, USA;3. NYU Tandon School of Engineering, Department of Mechanical and Aerospace Engineering, New York, USA;4. Universidad de La Rioja, Department of Mechanical Engineering, La Rioja, Spain;5. Orthosensor Inc., Dania Beach, FL, USA;6. Ghent University, Department of Human Structure and Repair, Ghent, Belgium;1. Department of Biological Engineering, Biohybrid Systems Research Center (BSRC), Inha University, 100 Inha-ro, Incheon, 22212, Republic of Korea;2. Platform Technology Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Daejeon 34129, Republic of Korea;3. WCSL of Integrated Human Airway-on-a-Chip, Inha University, 100 Inha-ro, Incheon, 22212, Republic of Korea;4. Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Republic of Korea |
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| Abstract: | The objective was to investigate how two distinct data collection procedures, raw coefficient of friction (COF) data versus averaged COF data, may affect the outcome and interpretation of statistical analysis of friction tests and thus the reliability of slip resistance assessments. A prototype portable slip meter (PSM) and a force platform (FP) were used for evaluating floor friction transients over contaminated surfaces. A one-way ANOVA was performed to estimate significant differences between the PSM and the FP using raw COF data (55 measurement points) and averaged COF data (five measurement points) respectively. For comparing the FP with the portable slip meter, the best approach is to use averaged friction data. When the portable slip meter is used independently for walkway friction measurement, either the averaged or the raw data can be used to present the test results. However, the larger sample size is always the preferred choice. |
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