AI 中文总结
研究基于分布式光纤传感提出用于生理监测的软垫，将单模光纤嵌入柔性硅树脂基质呈蛇形布局，经实验在标准办公椅靠背上对志愿者测试，实现大面积分布式传感、空间映射及定量心肺监测，验证了该方法的可行性。
AI 中文摘要
分布式光纤传感（DOFS）结合了光纤传感器的优点，如灵活性、小尺寸、抗电磁干扰和高计量性能，能将单根光纤转变为连续传感元件用于空间分辨机械测量。基于瑞利背散射的光频域反射测量（OFDR）实现了高空间分辨率的DOFS测量。但OFDR在生物医学应用方面仍未充分探索。本研究提出一种基于软DOFS的垫子作为生理监测的大面积接口。将单模光纤嵌入柔性硅树脂基质并呈蛇形布局，以在垫子表面分布传感。通过2.6毫米的标距间距，系统在50赫兹采样频率下在有效区域提供2250个传感点。在标准办公椅靠背上对六名健康志愿者进行近距坐姿评估。分布式输出实现了垫子响应的二维映射，反映了垫子的机械耦合和心肺引起的扰动。据此估计呼吸率和心率并与参考可穿戴系统比较。结果表明在基于DOFS的软近距接口中结合大面积分布式传感、空间映射和定量心肺监测是可行的。
英文摘要
Distributed optical fiber sensing (DOFS) combines the advantages of fiber optic sensors, including flexibility, small size, immunity to electromagnetic interference, and high metrological performance, with the capability to transform a single optical fiber into a continuous sensing element for spatially resolved mechanical measurements. Optical frequency domain reflectometry (OFDR), based on Rayleigh backscattering, enables high spatial resolution DOFS measurements, broadening the range of potential sensing applications. However, OFDR based DOFS remains largely unexplored for biomedical applications, despite the need for sensitive, spatially resolved, and conformable sensing interfaces. This study presents a soft DOFS based mat as a large-area interface for physiological monitoring. A single-mode optical fiber was embedded in a flexible silicone matrix and arranged in a serpentine layout to distribute sensing over the mat surface. With a gage pitch of 2.6 mm, the system provided 2250 sensing sites across the active area at a sampling frequency of 50 Hz. The mat was assessed on six healthy volunteers in a seated nearable configuration on the backrest of a standard office chair. The distributed output enabled two dimensional mapping of the mat response, reflecting back mat mechanical coupling and cardiorespiratory induced perturbations. Respiratory rate and heart rate were therefore estimated and compared with a reference wearable system. The maps revealed physiologically coherent spatial and temporal patterns, while the estimated rates showed good agreement with the reference measurements. These results demonstrate the feasibility of combining large area distributed sensing, spatial mapping, and quantitative cardiorespiratory monitoring within a DOFS based soft nearable interface.
Journal refV. Lavorgna et al., "A Nearable Soft Mat Based on Distributed Optical Fiber Sensing for Physiological Monitoring," in IEEE Sensors Journal
