Rowson Steven, Beckwith Jonathan G, Chu Jeffrey J, Leonard Daniel S, Greenwald Richard M, Duma Stefan M
Virginia Tech-Wake Forest, Center for Injury Biomechanics, Blacksburg VA, USA.
J Appl Biomech. 2011 Feb;27(1):8-14. doi: 10.1123/jab.27.1.8.
The high incidence rate of concussions in football provides a unique opportunity to collect biomechanical data to characterize mild traumatic brain injury. The goal of this study was to validate a six degree of freedom (6DOF) measurement device with 12 single-axis accelerometers that uses a novel algorithm to compute linear and angular head accelerations for each axis of the head. The 6DOF device can be integrated into existing football helmets and is capable of wireless data transmission. A football helmet equipped with the 6DOF device was fitted to a Hybrid III head instrumented with a 9 accelerometer array. The helmet was impacted using a pneumatic linear impactor. Hybrid III head accelerations were compared with that of the 6DOF device. For all impacts, peak Hybrid III head accelerations ranged from 24 g to 176 g and 1,506 rad/s(2) to 14,431 rad/s(2). Average errors for peak linear and angular head acceleration were 1% ± 18% and 3% ± 24%, respectively. The average RMS error of the temporal response for each impact was 12.5 g and 907 rad/s(2).
橄榄球运动中脑震荡的高发生率为收集生物力学数据以描述轻度创伤性脑损伤提供了独特的机会。本研究的目的是验证一种具有12个单轴加速度计的六自由度（6DOF）测量装置，该装置使用一种新颖的算法来计算头部每个轴向上的线性和角向头部加速度。该6DOF装置可集成到现有的橄榄球头盔中，并能够进行无线数据传输。将配备有6DOF装置的橄榄球头盔安装到配备有9个加速度计阵列的Hybrid III头部模型上。使用气动线性撞击器对头盔进行撞击。将Hybrid III头部模型的加速度与6DOF装置的加速度进行比较。对于所有撞击，Hybrid III头部模型的峰值加速度范围为24g至176g，角加速度范围为1,506rad/s²至14,431rad/s²。头部线性和角向加速度峰值的平均误差分别为1%±18%和3%±24%。每次撞击的时间响应的平均均方根误差为12.5g和907rad/s²。
