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Polymer Optical Fiber Goniometer: A New Portable Low Cost and Reliable Sensor for Joint Analysis

机译：聚合物光纤测角仪：一种新型便携式低成本可靠的联合分析传感器

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摘要

The quantitative measurement of an articular motion is an important indicator of its functional state and for clinical and pathology diagnoses. Joint angle evaluation techniques can be applied to improve sports performance and provide feedback information for prostheses control. Polymer optical fiber (POF) sensors are presented as a novel method to evaluate joint angles, because they are compact, lightweight, flexible and immune to electromagnetic interference. This study aimed to characterize and implement a new portable and wearable system to measure angles based on a POF curvature sensor. This study also aimed to present the system performance in bench tests and in the measurement of the elbow joint in ten participants, comparing the results with a consolidated resistive goniometer. Results showed high repeatability of sensors between cycles and high similarity of behavior with the potentiometer, with the advantage of being more ergonomic. The proposed sensor presented errors comparable to the literature and showed some advantages over other goniometers, such as the inertial measurement unit (IMU) sensor and over other types of POF sensors. This demonstrates its applicability for joint angle evaluation.
机译：关节运动的定量测量是其功能状态以及临床和病理学诊断的重要指标。关节角度评估技术可用于改善运动表现并为假体控制提供反馈信息。聚合物光纤（POF）传感器是一种新颖的评估关节角度的方法，因为它们结构紧凑，重量轻，柔性好并且不受电磁干扰。这项研究旨在表征和实现一种基于POF曲率传感器的新型便携式可穿戴系统，用于测量角度。这项研究还旨在介绍该系统在十名参与者的卧推测试和肘关节测量中的性能，并将结果与​​合并的电阻式测角仪进行比较。结果表明，传感器在周期之间具有较高的可重复性，并且与电位计的行为具有高度的相似性，具有更符合人体工程学的优点。所提出的传感器具有可与文献相媲美的误差，并且比其他测角仪（如惯性测量单元（IMU）传感器）和其他类型的POF传感器具有一些优势。这证明了其在关节角度评估中的适用性。

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