Traditional methods of measuring a joint angle are neither repeatable nor accurate and cannot instantly display, record, and upload the data onto a cloud drive. These mechanisms require development if they are to be used to evaluate rehabilitation programs. This pilot study aim is to create a simple dynamic joint angle measurement system and develop a hand rehabilitation application for stroke users using small and sensitive 3-axis accelerometers. Using Bluetooth communication technology, an electrogoniometer is developed to measure the free range of motion of lower limb joints and automatically send and save all data on to a cloud drive. The reliability of the proposed device is evaluated by comparison with a commercial electrogoniometer. Five healthy youth subjects and five health elderly subjects are involved in the evaluation process for this pilot study. The accuracy and repeatability of the proposed device are tested using Bland–Altman plots and linear correlation analysis. Measurements that were made by the proposed device and a commercial electrogoniometer are shown to be comparable and repeatable, as confirmed by Bland–Atman plots. There is also a very high degree of linear correlation (R² > 0.99 for all joint angle measurements) between the lower limb joint angles that are measured using both devices. In conclusion, a portable, highly accurate and repeatable device was designed to be used for clinical assessment and for rehabilitation application that gives increased motivation to the user.

中文翻译：

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主动手康复系统的动态关节角度测量装置

传统的测量关节角度的方法既不可重复也不准确，并且无法立即将数据显示，记录和上载到云驱动器中。如果将这些机制用于评估康复计划，则需要进行开发。该初步研究的目的是创建一个简单的动态关节角度测量系统，并使用小型且灵敏的3轴加速度计为中风用户开发手部康复应用程序。使用蓝牙通信技术，开发了一种电测角仪，用于测量下肢关节的自由运动范围，并将所有数据自动发送并保存到云驱动器中。通过与商用电测角仪进行比较，评估了所提出设备的可靠性。五项健康的青年受试者和五名健康的老年受试者参与了该初步研究的评估过程。使用Bland–Altman图和线性相关分析测试了所建议设备的准确性和可重复性。如Bland-Atman图所证实的，由建议的设备和商用电测角仪进行的测量显示出可比性和可重复性。线性相关度也很高（ 对于使用两个设备测量的下肢关节角度之间的所有关节角度，R ² > 0.99。总之，便携式，高精度和可重复使用的设备被设计用于临床评估和康复应用，这给用户带来了更大的动力。