This Letter demonstrates the application of polymer optical fibers (POFs) damaged by the fiber fuse effect to curvature sensing and dynamic angular monitoring. The curvature sensing performance using the fused-POF is compared to POF without the fuse effect. Both POFs are submitted to angles of up to 90 deg in flexion/extension cycles with angular velocities ranging from 0.48 rad/s to 5.61 rad/s. The fused POF is found to show higher performance with respect to sensitivity, correlation coefficient with linear regression, and hysteresis. For instance, at the angular velocity of 0.48 rad/s, the fused POF shows $>3$ times higher sensitivity and significantly lower hysteresis than those of the non-fused POF. In addition, the fused POFs have lower cross-sensitivity and hysteresis variations on the tests with different angular velocities. These results indicate that the fused POFs are potential candidates to develop curvature sensors with various advantages over non-fused POFs, for applications such as gait analysis and wearable robotics.

中文翻译：

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使用熔融聚合物光纤的曲率传感器的设计与表征

这封信演示了被光纤熔丝效应损坏的聚合物光纤（POF）在曲率检测和动态角度监测中的应用。将使用熔融POF的曲率检测性能与没有保险丝效应的POF进行了比较。两个POF在屈曲/伸展循环中的角度最大为90度，角速度范围为0.48 rad / s至5.61 rad / s。发现融合的POF在灵敏度，线性回归的相关系数和磁滞方面表现出更高的性能。例如，在0.48 rad / s的角速度下，熔融POF显示$>3$是非融合POF的两倍，更高的灵敏度和更低的磁滞。此外，在不同角速度的测试中，熔融POF具有较低的交叉灵敏度和磁滞变化。这些结果表明，对于步态分析和可穿戴机器人等应用，融合式POF可能是开发曲率传感器的候选者，与非融合式POF相比具有各种优势。