Biomechanics of volunteers subject to loading by a motorized shoulder belt tensioner.

摘要: STUDY DESIGN: A biomechanical study using human volunteers. OBJECTIVE: Motorized shoulder belt tensioning is a new seatbelt technology that likely to be incorporated into future vehicles. The objective of this was characterize the upper torso biomechanics 3 sizes adult volunteers (5th percentile female, 50th male, and 95th male) subjected motorized in static environment. SUMMARY OF BACKGROUND DATA: There lack volunteer data concerning occupants subject precrash tensioning. Studies repositioning by air force for ejection seats are much too aggressive relevant systems. Low-level well tolerated vehicle but optimized performance occupant size unknown. METHODS: Nineteen male 6 female subjects were instrumented fixture designed support leaning forward apply tension. 5th females, males, males. Reflective markers placed on monitor kinematics during RESULTS: Changes spinal curvature small angular motion originated within 4.2 cm pelvis-femur junction or H-point. Torso retraction timing found be: 54.3 degrees 0.78 seconds 57.6 0.95 42.2 0.92 male. CONCLUSION: Occupant has significant effect time reposition Larger require more because slower velocity. results sufficiently simple lumped-mass model can predict kinetics. Language: en