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Error Analysis of Curvature-Based Contour Measurement Devices
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 06, 2000 by SAE International in United States
Annotation ability available
Event: SAE 2000 World Congress
Curvature-based contour measurement devices with discrete curvature measurement gauges are widely used for the measurement of dynamic thoracic contours in both dummy and cadaveric automobile sled testing. Such devices include the chestband used to determine local thoracic contours at several rib levels for evaluation of injury parameters in dummy and cadaveric subjects. The use of these devices involves integration of local curvatures to obtain position data, and often incorporates several approximations, including a quasi-continuous approximation of discrete measured curvatures.
By comparing a reference and a calculated position profile, this study analyzes the error in local positions induced from several sources. The first source of error is the measurement of curvatures at discrete locations, typically with 2.5 - 5.0 cm curvature gauge spacing. Potential differences in integrated position measurements are calculated and compared for a contour measurement device following corrugations of various widths and heights. The second source of error is a limitation in the curvature full scale. Position errors from exceeding typical curvature limits are found. The study provides a comparison of physical contour parameters and full scale limitations against measurement accuracy for a range of parameters typical of existing dynamic tests. This investigation also includes error analysis of contour measurement devices of previous dummy and cadaver tests. Recommendations are made for acceptable parameter ranges for dummy and cadaveric thoracic sled testing and for the design of enhanced thoracic contour measurement devices.
CitationBass, C., Wang, C., and Crandall, J., "Error Analysis of Curvature-Based Contour Measurement Devices," SAE Technical Paper 2000-01-0054, 2000, https://doi.org/10.4271/2000-01-0054.
SAE 2000 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V109-6; Published: 2001-09-15
Number: V109-6; Published: 2001-09-15
- Eppinger R.H. On the Development of a Deformation Measurement System and Its Application Toward Developing Mechanically Based Injury Indices Proceedings of the Thirty Third Stapp Car Crash Conference, SAE Paper Number 892426 1989
- Chi Associates RBANDPC User's Manual v. 1.1 Chi Associates Arlington, Virginia 1990
- Hagedorn A. Pritz H. Evaluation of Chest Deformation Measurement Band NHTSA, DOT HS-807-838 1991
- Yoganandan N. et. al. Thoracic Deformation Contours in a Frontal Impact SAE Paper Number 912891 Society of Automotive Engineers Warrendale, PA 1991
- Pintar F. et. al. Instrumentation of Human Surrogates for Side Impact SAE Paper Number 962412 Society of Automotive Engineers Warrendale, PA 1996
- Bass C.R. Crandall J.R. Wang C. Pilkey W.D. Chou C. Open-Loop Chestbands for Dynamic Deformation Measurements SAE Paper Number 980857 Society of Automotive Engineers Warrendale, PA 1998
- Bass C.R. Crandall J.R. Bolton J.R. Pilkey W.D. Khaewpong N. Sun E. Deployment of Air Bags into the Thorax of an Out-of-Position Dummy SAE Paper Number 1999-01-0764 Society of Automotive Engineers Warrendale, PA 1999
- Kleinberger M. Sun E. Eppinger R. Kuppa S. Saul R. Development of Improved Injury Criteria for the Assessment of Advanced Automotive Restraint Systems NHTSA Document @ www.nhtsa.dot.gov September 1998
- Shaw C. Wang C. Bolton J. Bass C. Crandall J. Butcher J. Khaewpong N. Sun E. Nguyen T. Chestband Performance Assessment Using Quasistatic Tests 2000 SAE International Congress Detroit, MI 2000
- Duch M.K. Analysis of Thoracic Injury Criteria University of Virginia May 1994
- Oppenheim A. Schafer R. Digital Signal Processing Prentice-Hall New York 1975