摘要
目的设计一台基于坐姿的下肢康复训练系统,以帮助各类下肢运动功能障碍患者实现髋、膝、踝关节的有效康复训练。方法首先设计坐姿下肢康复训练系统的整体结构;然后采用SolidWorks对系统整体结构进行三维建模,并用有限元分析软件Ansys对主要受力部件进行变形量分析和强度校核;最后对实体样机进行调试,验证本训练系统设计的可行性和合理性。结果该系统主要包括可移动训练座椅、外骨骼机械腿、髋关节间距调节装置以及电控部分。座椅支撑最大的等效应力为5.2315 MPa,且最大变形量仅为0.0128 mm;移动导杆最大等效应力为204.59MPa,最大变形量为1.72 mm;脚踝部分最大等效应力为97.326 MPa,脚踝部分最大变形量为0.62mm。该训练系统可以满足身高在155~190 cm内的患者使用。机械腿膝关节运动到最大及最小极限角度的可靠性组内相关系数(intraclass correlation coefficient,ICC)分别为0.823和0.895;踝关节运动到背屈、趾屈极限位角度的可靠性ICC值分别为0.861和0.833。结论本训练系统各主要受力部件的强度和变形量都能满足要求;能够达到髋、膝、踝三关节预定动作范围,可带动受试者实现各种模式的下肢康复训练,具有较好的可行性和合理性。
Objective Based on the sitting position,this paper designes a system for lower limb rehabilitation training,which can help patients with hip,knee and ankle joints rehabilitation. Methods Firstly,the whole structure of sitting lower limb rehabilitation training system was designed; and the Software SolidWorks was used for the whole structure of 3D modeling. Then,we used the finite element analysis software to analyze the deformation and strength check of the main bearing parts. Finally,the sample machine was debugged to verify the feasibility and rationality of the design. Results The system included a movable chair,two external skeletal mechanical legs,a distance adjustment device of hip,and an electric cabinet. Seat support＇s maximum equivalent stress and the maximum deformation was 5. 2315 MPa and 0. 0128 mm. Mobile guide＇s rod maximum equivalent stress and biggest deformation was 204. 59 MPa and 1. 72 mm. Ankle part＇s maximum equivalent stress and deformation was 97. 326 MPa and 0. 62 mm. The training system could meet the height within 155-190 cm patients. When the mechanical leg knee joint moved to the maximum and minimum limit angle,the reliability ICC value was 0. 823 and 0. 895.When the mechanical ankle moved to dorsiflexion and toe ultimate flexion angle,the reliability ICC value was0. 861 and 0. 833. Conclusions The strength and the deformation of the main stress components can meet the requirements. This training system can reach the range of preconcerted actions of three joints,lead patients with lower limb dysfunction to practice many types of lower limbs rehabilitation training,to have good feasibility and rationality.
出处
《北京生物医学工程》
2017年第3期237-244,共8页
Beijing Biomedical Engineering
关键词
下肢康复训练
结构设计
有限元分析
三维建模
组内相关系数
lower limb rehabilitation training
structure design
finite element analysis
3D modeling
intraclass correlation coefficient
