一种用于膝关节生物力学研究的屈曲运动加载系统  

A Flexion Loading System for Knee Biomechanics Research

作　　者：宋爱晶[1,2] 廖庆丰[1] 李晓芳[1] 邓林红[1] 

机构地区：[1]重庆大学生物工程学院生物流变科学与技术教育部重点实验室,重庆400030 [2]广东省体育科学研究所,广州510663

出　　处：《生物医学工程学杂志》2012年第4期710-715,共6页Journal of Biomedical Engineering

基　　金：重庆市自然科学基金计划重点项目资助(CSTC;2010BA5001);重庆大学大型仪器设备开放基金资助项目(2010063057);重庆大学研究生科技创新基金资助项目(CDJXS11230044)

摘　　要：针对膝关节生物力学特性研究的重要意义,设计和构建一种膝关节屈曲运动加载系统。系统由驱动装置、控制装置、判定屈曲角度的图像系统三部分构成。驱动装置包括步进电机和由一系列夹具、活杆等部件构成的传动机构,传动机构在步进电机的带动下驱动膝关节做屈曲运动。驱动装置的运行则通过由单片机、计算机、RS232等构成的控制装置实施控制。采用图像处理技术快速判断屈曲运动的角度,从而对屈曲运动进行反馈控制,实现了对膝关节屈曲运动的速度、幅度和时间长度的精确加载并对运动中屈曲角度的快速非接触式测定。该系统构造简单,易于操作,精度和可靠性较高,为研究膝关节动态生物力学特性,以及辅助膝关节患者术后恢复训练等提供了一种重要的工具。It is important to design and build a kinetic loading system for flexing movement of knee joint to study knee biomechanics. The system reported here includes driving device, control device, and flexion angle determination ima- ging system. The driving device was constructed with a stepper motor and a mechanical transmission with a serried of clamps, shanks and so on, and the driving device was controlled by the control device with micro-control unit, a computer and the serial 232. While the knee joint was driven to move by the stepper motor, the flexion angle of the knee was determined using imaging-based techniques. The system achieved accurate loading and control of speed, ex- tent and duration of knee flexion, as well as fast and non-contract determination of flexion angle during knee flexing movement. The system is simple to build, easy to operate, highly accurate and reliable and it provides an important tool for the study of knee biomechanics, and potentially provides a tool for helping patients of knee surgery during their post operation recovery training.

关 键 词：膝关节 生物力学 屈曲运动 加载系统 图像处理 

分 类 号：R318.01[医药卫生—生物医学工程]