基于随机视觉刺激的人体平衡能力评测系统研究

发布时间：2018-05-31 13:26

本文选题：随机视觉刺激 + 平衡能力　；参考：《中国生物医学工程学报》2014年04期

【摘要】：为了更客观地评测人体在各方向上的平衡能力,本研究将人体平衡过程在外部激励下的完整动力学模型,合理简化为二阶线性系统,并将调节时间作为反映系统响应速度快慢的指标;同时,通过采用各方向等概率随机视觉激励,避免受测者对评测过程的预准备。通过以PC/104为核心控制器和以QNX为实时操作系统构建的评测系统及其界面,为被测者提供视觉激励源,并利用力平台检测装置采集重心波动信息,同时提取调节时间作为评测平衡能力的指标。以16名健康大学生为对象的实验,结果表明,正常人平衡调节时间的参考范围为4~8 s,人体在前后方向的平衡能力要优于左右方向。该系统可对其平衡受损方向进行定量客观评定,可更好地满足临床要求。
[Abstract]:In order to evaluate the balance ability of the human body in various directions more objectively, the complete dynamic model of the human body equilibrium process under external excitation is reasonably simplified as a second-order linear system. The adjusting time is taken as an index to reflect the speed of response of the system, and at the same time, by using random visual excitation of equal probability in all directions, the participants are avoided from preparing for the evaluation process. By using PC/104 as the core controller and QNX as the real-time operating system, the evaluation system and its interface are used to provide the visual excitation source for the subjects, and the force platform detection device is used to collect the information of the center of gravity fluctuation. At the same time, the adjustment time is extracted as an index to evaluate the balance ability. The experimental results of 16 healthy college students showed that the reference range of balance adjustment time of normal people was 4 ~ 8 s, and the balance ability of human body in front and back direction was better than that in left and right direction. The system can be used for quantitative and objective evaluation of the direction of the damaged balance, and it can better meet the clinical requirements.
【作者单位】：河北大学电子信息工程学院;中国石油大学机电工程学院;
【基金】：河北省科技支撑计划(07212106D) 河北大学医工交叉开放基金(BM201105)
【分类号】：R310

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