26 Apr 2016
Unique head restraint and car seat system could reduce whiplash injuries
A reactive head restraint and car seat system designed to reduce whiplash in rear-end vehicle collisions has been unveiled by engineers at the University.
The unique concept has been brought to life using linkage analysis which demonstrates how the head restraint and car seat react simultaneously, when the body of the occupant begins to push against the seat back during a rear-end collision.
Memis Acar, Professor of Mechanics in the Wolfson School of Mechanical, Electrical and Manufacturing Engineering, said the results from the simulation, based on a rigid human model positioned in driving posture, showed that the integration of a reactive head restraint and car seat would be very effective in reducing the occurrence of whiplash.
The simulations were carried out by student Rickie Bewsher for his individual project as part of his Mechanical Engineering (MEng) degree.
During a rear-end collision, the head restraint adjusts itself to an elevated position and closer to the occupant’s head, while the car seat rotates rearwards in a controlled manner to limit the differential motion between the head and the torso. It is the integration of these two systems which has the potential to limit the relative motion between the head and torso, and the range of backward rotation of the head, therefore reducing the whiplash effect on the cervical spine.
Whiplash - soft tissue strain of the neck - is caused by a sudden movement of the head, mainly backwards. The most common whiplash injuries occur from rear impacts in car accidents at speeds of less than 25km/h.
Whiplash claims are said to cost the insurance industry about £2 billion a year, with the number of whiplash injury claims in the UK predicted to have reached 840,000 last year.
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