Crash pulse recorders in rear impacts: real life data

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Krafft, Maria¹; Kullgren, Anders¹; Tingvall, Claes³

Crash pulse recorders in rear impacts: real life data

Proceedings of the 16th International Technical Conference on the Enhanced Safety of Vehicles (ESV)

Affiliations

¹Folksam Research

²Karolinska Institute

³Swedish National Road Administration, Sweden
Abstract

AIS 1 neck injuries have become the most common injury in vehicle crashes, especially rear impacts. Reserch has shown that there are variations in rear impacts causing initial symptoms and residual disability to the neck. Therefore impacts in which the duration of symtoms differ need to be separated in analyses. Concerning AIS 1 neck injury, crash severity is usually measured as change of velocity. The correlation between injury risk and impact severity parameters based on acceleration levels is to a high extent unknown. In this study, the results corn crash recording of real life rear impacts are presented where the change of velocity and the crash pulse is measured. Out of 22 impacts, it was shown that most of the occupants that sustained symptoms the shape of the crash pulse varied considerably and the peak acceleration varied f?om 2.7g to 14.7g. In one impact the occupant had whiplash symptoms six month after the collision (peak acceleration 14.7g) and in another impact , two months after, when this article was written (peak acceleration 12.6g). Also, high change of velocity (>2Okm/h) does not have to cause disability to the neck at least when the mean acceleration is less than 7g and no clear peaks exist.
Links

URL: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv16/98s6o10.pdf

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Cited By (8)

Year	Entry
2002	Croft AC, Haneline MT, Freeman MD. Low speed frontal crashes and low speed rear crashes: is there a differential risk for injury? In: 46th Annual Proceedings, Association for the Advancement of Automotive Medicine (AAAM). September 30–October 2, 2002; Tempe, AZ.
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1999	Eriksson L, Boström O. Assessing the influence of crash pulse, seat force characteristics, and head restraint position on NIC_max in rear-end crashes using a mathematical BioRID dummy. In: Proceedings of the 1999 International IRCOBI Conference on the Biomechanics of Impact. September 23-24, 1999; Sitges, Spain.213-230.
1999	Kullgren A, Thomson R, Krafft M. The effect of crash pulse shape on AIS1 neck injuries in frontal impacts. In: Proceedings of the 1999 International IRCOBI Conference on the Biomechanics of Impact. September 23-24, 1999; Sitges, Spain.231-242.
2006	Hughes MC, Moss RT, Happer AJ. Occupant injury symptom duration resulting from low speed collisions. In: Proceedings of the 2006 International IRCOBI Conference on the Biomechanics of Impact. September 20-22, 2006; Madrid, Spain.345-348.
2000	Boström O, Fredriksson R, Håland Y, Jakobsson L, Krafft M, Lövsund P, Muser MH, Svensson MY. Comparison of car seats in low speed rear-end impacts using the BioRID dummy and the new neck injury criterion (NIC). Accid Anal Prev. March 2000;32(2):321-328.
2003	Clayton LT Jr. Evaluation of Event Data Recorders in Real World Crashes and Full-Scale Crash Tests [Master's thesis]. Rowan University; November 2003.
2019	Tatem WM. The Crash Injury Risk to Rear Seated Passenger Vehicle Occupants [PhD thesis]. Virginia Polytechnic Institute and State University; December 13, 2019.