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首页> 外文期刊>Journal of Rehabilitation Research and Development >Effect of rear suspension and speed on seat forces and head accelerations experienced by manual wheelchair riders with spinal cord injury
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Effect of rear suspension and speed on seat forces and head accelerations experienced by manual wheelchair riders with spinal cord injury

机译：后悬架和速度对手动轮椅车手脊髓损伤后坐垫力和头部加速度的影响

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摘要

Wholebody shocks and vibrations experienced during manual wheelchair use can decrease an individual's comfort, increase the rate of fatigue, result in injury, and consequently limit mobility and community participation. We used a wheelchairvibration simulator to examine whether the seat reaction forces experienced by wheelchair users were differentially influenced by wheelchair suspension, trunkmuscle innervations, and ground speed. We used wheelchairs instrumented with load cells and accelerometers to determine the forces transmitted from the seat frame and the head accelerations experienced by riders. We determined that selfselected speed, seat force, and head accelerations differed between subjects with and without trunkmuscle innervations and between rigid and suspension wheelchairs. Seat force and head accelerations were greatest in the rigidframe wheelchair and lowest in the springtype suspensionframe wheelchairs. Those participants without trunkmuscle innervations preferred slower speeds than those with trunkmuscle innervations. Forward head accelerations were greater in those without than with trunkmuscle innervations. Wheelchair rearsuspension systems may improve wheelchair mobility function in terms of comfort at higher velocity by minimizing the seat forces and head accelerations experienced by the riders, especially those with higher level spinal cord injury and diminished postural control.
机译：手动轮椅使用过程中发生的全身震动和振动会降低个人的舒适度，增加疲劳率，导致伤害，并因此限制活动性和社区参与度。我们使用了轮椅振动模拟器来检查轮椅使用者承受的座椅反作用力是否受到轮椅悬架，躯干肌神经支配和地面速度的不同影响。我们使用装有称重传感器和加速度计的轮椅来确定从座椅框架传递的力和骑手经历的头部加速度。我们确定，在有和没有躯干肌神经支配的受试者之间以及刚性轮椅和悬挂轮椅之间，自我选择的速度，座椅力和头部加速度有所不同。刚性框架轮椅的座椅力和头部加速度最大，而弹簧悬挂框架轮椅的座椅力和头部加速度最低。没有躯干肌神经支配的参与者比那些具有躯干肌神经支配的参与者更喜欢慢的速度。无躯干神经支配者的向前头部加速度更大。轮椅后悬架系统可通过最大程度地降低骑乘者，尤其是脊髓损伤程度较高且姿势控制减弱的乘员所受的座椅力和头部加速度，来提高轮椅在较高速度时的舒适性。

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