School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
School of P.E and Sports, Beijing Normal University, Beijing, China.
PLoS One. 2023 Jan 26;18(1):e0279478. doi: 10.1371/journal.pone.0279478. eCollection 2023.
The electric stair-climbing wheelchair is a beneficial mobile assistance device for older adults and disabled persons with poor walking ability, as it reduces the daily walking and climbing burden. In this paper, 11 older adults were tested when using a stair-climbing wheelchair in three environments: flat ground, slopes, and stairs. The kinematic and dynamic parameters of the lower limb joints were simulated by AnyBody 7.2 human model simulation software using Vicon 3D infrared motion capture, a 3D force table, and analyzed by ANSYS 19.2 Workbench. The joint force, joint moment, and muscle strength did not change significantly under the three environments when using the wheelchair. Through finite element analysis of the mechanical properties of the human body, when using the wheelchair, no significant differences in the overall stress distributions of the fifth lumbar spine, hip bone, or femur were found among the three environments, no significant differences in deformation and displacement were found, and the stress distribution was relatively stable. Therefore, the human body is stable enough to use the electric stair-climbing wheelchair in the three test environments, all of which will be commonly encountered in daily life.
电动爬楼梯轮椅是一种有益于行动不便的老年人和残疾人士的移动辅助设备，因为它减轻了日常行走和爬楼梯的负担。本文中，11 名老年人在平地、斜坡和楼梯三种环境下使用爬楼梯轮椅进行了测试。利用 Vicon 3D 红外运动捕捉系统、三维力台和 ANSYS 19.2 Workbench 对下肢关节的运动学和动力学参数进行了 AnyBody 7.2 人体模型模拟软件模拟分析。使用轮椅时，三种环境下关节力、关节力矩和肌肉力量均无明显变化。通过对人体力学特性的有限元分析，使用轮椅时，在三种环境下第五腰椎、髋骨和股骨的整体应力分布没有显著差异，变形和位移也没有显著差异，应力分布较为稳定。因此，人体在三种测试环境下使用电动爬楼梯轮椅时足够稳定，这些环境在日常生活中都很常见。
