The recent advancement of motion tracking technology offers better treatment tools for conditions, such as movement disorders, as the outcome of the rehabilitation could be quantitatively defined. The accurate and fast angular information output of the inertial measurement unit tracking systems enables the collection of accurate kinematic data for clinical assessment. This article presents a study of a low-cost microelectromechanical system inertial measurement unit-based tracking system in comparison with the conventional optical tracking system. The system consists of seven microelectromechanical system inertial measurement units, which could be mounted on the lower limbs of the subjects. For the feasibility test, 10 human participants were instructed to perform three different motions: walking, running, and fencing lunges when wearing specially designed sleeves. The subjects' lower body movements were tracked using our inertial measurement unit-based system and compared with the gold standard-the NDI Polaris Vega optical tracking system. The results of the angular comparison between the inertial measurement unit and the NDI Polaris Vega optical tracking system were as follows: the average cross-correlation value was 0.85, the mean difference of joint angles was 2.00°, and the standard deviation of joint angles was ± 2.65°. The developed microelectromechanical system-based tracking system provides an alternative low-cost solution to track joint movement. Moreover, it is able to operate on an Android platform and could potentially be used to assist outdoor or home-based rehabilitation.

中文翻译：

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与光学跟踪相比，用于身体运动的惯性测量单元跟踪系统。

运动跟踪技术的最新进步为诸如运动障碍之类的状况提供了更好的治疗工具，因为康复的结果可以得到量化定义。惯性测量单元跟踪系统的准确而快速的角度信息输出可以收集准确的运动学数据，以进行临床评估。与传统的光学跟踪系统相比，本文提出了一种基于低成本微机电系统惯性测量单元的跟踪系统的研究。该系统由七个微机电系统惯性测量单元组成，可以安装在受试者的下肢上。在可行性测试中，指示10位人类参与者执行三种不同的动作：步行，跑步，穿着专门​​设计的袖子时要击剑。使用我们基于惯性测量单元的系统跟踪受试者的下半身运动，并将其与黄金标准NDI Polaris Vega光学跟踪系统进行比较。惯性测量单元与NDI Polaris Vega光学跟踪系统之间的角度比较结果如下：平均互相关值为0.85，关节角度的平均差为2.00°，关节角度的标准偏差为±2.65°。开发的基于微机电系统的跟踪系统为跟踪关节运动提供了另一种低成本解决方案。此外，它能够在Android平台上运行，并有可能被用于辅助户外或家庭康复。使用我们基于惯性测量单元的系统跟踪下半身的运动，并将其与黄金标准NDI Polaris Vega光学跟踪系统进行比较。惯性测量单元与NDI Polaris Vega光学跟踪系统之间的角度比较结果如下：平均互相关值为0.85，关节角度的平均差为2.00°，关节角度的标准偏差为±2.65°。开发的基于微机电系统的跟踪系统为跟踪关节运动提供了另一种低成本解决方案。此外，它能够在Android平台上运行，并有可能被用于辅助户外或家庭康复。使用我们基于惯性测量单元的系统跟踪下半身的运动，并与黄金标准NDI Polaris Vega光学跟踪系统进行比较。惯性测量单元与NDI Polaris Vega光学跟踪系统之间的角度比较结果如下：平均互相关值为0.85，关节角度的平均差为2.00°，关节角度的标准偏差为±2.65°。开发的基于微机电系统的跟踪系统为跟踪关节运动提供了另一种低成本解决方案。此外，它能够在Android平台上运行，并有可能被用于辅助户外或家庭康复。