This study characterizes pediatric wheelchair kinematic responses and wheelchair tiedown and occupant restraint system (WTORS) loading during rear impact. It also examines the kinematic and loading effects of wheelchair headrest inclusion in rear impact. In two separate rear-impact test scenarios, identical WC19-compliant manual pediatric wheelchairs were tested using a seated Hybrid III 6-year-old anthropomorphic test device (ATD) to evaluate wheelchair kinematics and WTORS loading. Three wheelchairs included no headrests, and three were equipped with slightly modified wheelchair-mounted headrests. Surrogate WTORS properly secured the wheelchairs; three-point occupant restraints properly restrained the ATD. All tests used a 26 km/h, 11 g rear-impact test pulse. Headrest presence affected wheelchair kinematics and WTORS loading; headrest-equipped wheelchairs had greater mean seatback deflections, mean peak front and rear tiedown loads and decreased mean lap belt loads. Rear-impact tiedown loads differed from previously measured loads in frontal impact, with comparable tiedown load levels reversed in frontal and rear impacts. The front tiedowns in rear impact had the highest mean peak loads despite lower rear-impact severity. These outcomes have implications for wheelchair and tiedown design, highlighting the need for all four tiedowns to have an equally robust design, and have implications in the development of rear-impact wheelchair transportation safety standards.
Characterization of pediatric wheelchair kinematics and wheelchair tiedown and occupant restraint system loading during rear impact
Messungen der Kinematik pediatrischer Rollstuhle mit Bodenlastsicherung und Dreipunktgurt beim Heckaufprall
Medical Engineering and Physics ; 32 , 3 ; 280-286
2010
7 Seiten, 8 Bilder, 1 Tabelle, 29 Quellen
Article (Journal)
English
WHEELCHAIR TIEDOWN AND OCCUPANT RESTRAINT SYSTEMS FOR USE IN MOTOR VEHICLES
SAE Technical Papers | 1996
Wheelchair Tiedown and Occupant Restraint Systems for Use in Motor Vehicles
SAE Technical Papers | 1999
British Library Conference Proceedings | 1996
|British Library Conference Proceedings | 1994
|SAE Technical Papers | 1994
|