Three-Dimensional Child Anthropometry.4 PDF
Preview Three-Dimensional Child Anthropometry.4
Three-Dimensional Child Anthropometry for Vehicle Safety Analysis Matthew P. Reed Sheila M. Ebert-Hamilton Biosciences Group October 2012 Children in Cars Data on the size, shape, and posture of children are needed for: Developing ATDs! CRS Design! Developing Computational Models! Optimizing Belt Restraints! Child Anthropometry • The most recent large-scale, detailed study of U.S. children was conducted by UMTRI (HSRI) in the 1970s for the US Consumer Product Safety Commission • The ongoing U.S. NHANES gathers stature, body weight, and a few other dimensions, but this information is insufficient for product design and analysis Standard Anthropometry Anthropometers, calipers, and tape measures: 1D dimensions Snyder et al. (1977)! Child Body Shells The current Hybrid-III 3YO and 6YO ATDs are based on standard anthropometry and 3-D surface representations based on 1-D data created in the early 1970s 6YO! 3YO! Young et al. (1975)! Functional Anthropometry Measure physical attributes in task-relevant conditions Measuring posture by digitizing the Measuring belt fit 3D locations of body landmarks Multivariate Functional Anthro Target Body Vehicle and Seat Geometry! Dimensions: Stature, Body Weight, …! Regression! Whole-Body Landmark & Joint Configurations! Principal Component Analysis! Measure Landmarks in Seated Postures! Large Child Omnidirectional Dummy (Humanetics ATD) Joint Center Location Estimates! Crash Dummy Anthro Specs! UMTRI Child Body Shape Study Objective: Quantify body shape and vehicle seating postures for children ages 4 to 11 Posture and belt fit in vehicle seating Standard anthropometry Whole-body scanning Subject Pool Total 162 children (78 boys, 82 girls), ages 4 to 11 Hybrid III Reference Dimensions Small Female Adult 6YO 3YO 10YO Methods – Standard Anthro 23 standard anthropometric dimensions taken to document child size Methods match previous large-scale UMTRI child anthropometry study (Snyder et al. 1977) where possible
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