Analysis of Whole-Body Vibration Using Electric Powered Wheelchairs on Surface Transitions.
Analysis of Whole-Body Vibration Using Electric Powered Wheelchairs on Surface Transitions.
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作者：
轮椅使用者在人行道和城市环境中驾驶时会受到全身振动 (WBV) 的影响；然而，关于电动轮椅使用者在日常活动中驾驶时的 WBV 暴露的文献有限。此外，表面过渡（即路缘坡道）提供从街道交叉口到人行道的轮椅通道；但这些都需要一个排水门槛。当不满足可访问性指南时，该阈值可能会引起高 WBV（即均方根和振动日值加速度）。本研究分析了在不同阈值的路面上行驶时，被动悬架电动轮椅的 WBV 效应。此外，本研究还引入了一种新型电动轮椅，具有主动悬架，可降低表面过渡时的 WBV 水平。使用具有被动悬架的商用电动轮椅、具有主动悬架的新型电动轮椅和不具有主动悬架的新型电动轮椅在具有五个不同阈值的表面上行驶进行了三项试验。结果显示所有表面的 EPW 之间没有 WBV 差异。然而，当使用被动悬架时，振动剂量值随着较高的表面阈值而增加，而主动悬架保持恒定。总体而言，具有主动悬架的电动轮椅提供了与被动悬架类似的 WBV 效果。虽然在表面阈值之间观察到显着的振动剂量值差异，但所有 EPW 都将 WBV 值维持在 ISO 2631-1 健康警戒区以下。
Wheelchair users are exposed to whole-body vibration (WBV) when driving on sidewalks and in urban environments; however, there is limited literature on WBV exposure to power wheelchair users when driving during daily activities. Further, surface transitions (i.e., curb-ramps) provide wheelchair accessibility from street intersections to sidewalks; but these require a threshold for water drainage. This threshold may induce high WBV (i.e., root-mean-square and vibration-daily-value accelerations) when accessibility guidelines are not met. This study analyzed the WBV effects on power wheelchairs with passive suspension when driving over surfaces with different thresholds. Additionally, this study introduced a novel power wheelchair with active suspension to reduce WBV levels on surface transitions. Three trials were performed with a commercial power wheelchair with passive suspension, a novel power wheelchair with active suspension, and the novel power wheelchair without active suspension driving on surfaces with five different thresholds. Results show no WBV difference among EPWs across all surfaces. However, the vibration-dose-value increased with higher surface thresholds when using the passive suspension while the active suspension remained constant. Overall, the power wheelchair with active suspension offered similar WBV effects as the passive suspension. While significant vibration-dose-value differences were observed between surface thresholds, all EPWs maintained WBV values below the ISO 2631-1 health caution zone.
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