Flexible Liquid‐Filled Fiber Adapter Enabled Wearable Optical Sensors,Advanced Materials Technologies

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Flexible Liquid‐Filled Fiber Adapter Enabled Wearable Optical Sensors
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-04-27 , DOI: 10.1002/admt.202000079
Jing Pan ₁ , Chengpeng Jiang ₂ , Zhang Zhang ₁ , Lei Zhang _{1,

2} , Xiaozhi Wang ₃ , Limin Tong ₁

Affiliation

Wearable optical sensors are attracting intensive research interests owing to their advantage of high sensitivity, fast response, and immunity to electromagnetic interferences. However, tunable optical properties and reconfigurable sensor structures remain great challenges for the wearable optical sensors. Herein, flexible liquid‐filled fiber adapters (FLFFAs), which are sensitive to mechanical stimuli, are demonstrated. The novel FLFFA consists of a soft liquid‐filled tubing and two silica optical fibers. The liquid core bestows the FLFFA both tunability and reconfigurability in sensing performance. Deformation of the tubing through bending or pressing results in wavelength‐insensitive changes in light transmission. By measuring the output intensity, the FLFFA based sensors achieve high angle resolution (0.18°) and low detection limit (0.7 mN) for bending and pressure sensing, respectively. The superior sensing properties together with mechanical flexibility and robustness enable real‐time monitoring of finger joint motion, respiration, and wrist pulse. Benefiting from an LED charge‐coupled device (CCD) signal recording system, a 4 × 3 keyboard is realized by simultaneously measuring the output signals of 12 FLFFAs. The FLFFA provides a promising method to detect subtle physiological signals and may find applications in healthcare devices, artificial skins, and sensor networks.

中文翻译：

启用了柔性液体填充光纤适配器的可穿戴式光学传感器

由于可穿戴式光学传感器具有高灵敏度，快速响应和抗电磁干扰的优势，因此引起了广泛的研究兴趣。然而，可穿戴光学传感器的可调光学性能和可重构传感器结构仍然是巨大的挑战。在此，展示了对机械刺激敏感的柔性液体填充光纤适配器（FLFFA）。新型FLFFA由充满液体的软管和两条石英光纤组成。液芯赋予FLFFA在传感性能上的可调性和可重构性。通过弯曲或挤压使管变形会导致光透射率对波长不敏感的变化。通过测量输出强度，基于FLFFA的传感器可实现高角度分辨率（0.18°）和低检测极限（0。7 mN）分别用于弯曲和压力感应。出色的传感性能以及机械灵活性和耐用性可实现对手指关节运动，呼吸和腕部脉搏的实时监控。得益于LED电荷耦合器件（CCD）信号记录系统，可通过同时测量12个FLFFA的输出信号来实现4×3键盘。FLFFA提供了一种检测微妙的生理信号的有前途的方法，并可能在医疗保健设备，人造皮肤和传感器网络中找到应用。通过同时测量12个FLFFA的输出信号可实现4×3键盘。FLFFA提供了一种检测微妙的生理信号的有前途的方法，并可能在医疗保健设备，人造皮肤和传感器网络中找到应用。通过同时测量12个FLFFA的输出信号可实现4×3键盘。FLFFA提供了一种检测微妙的生理信号的有前途的方法，并可能在医疗保健设备，人造皮肤和传感器网络中找到应用。

更新日期：2020-04-27

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