Kanellos George T, Papaioannou George, Tsiokos Dimitris, Mitrogiannis Christos, Nianios George, Pleros Nikos
Department of Informatics, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Opt Express. 2010 Jan 4;18(1):179-86. doi: 10.1364/OE.18.000179.
We report on the development of a flexible 2D optical fiber-based pressure sensing surface suitable for biomedical applications. The sensor comprises of highly-sensitive Fiber Bragg Grating elements embedded in a thin polymer sheet to form a 2x2 cm(2) sensing pad with a minimal thickness of 2.5mm, while it is easily expandable in order to be used as a building block for larger surface sensors. The fabricated pad sensor was combined with a low physical dimension commercially available interrogation unit to enhance the portability features of the complete sensing system. Sensor mechanical properties allow for matching human skin behavior, while its operational performance exhibited a maximum fractional pressure sensitivity of 12 MPa(-1) with a spatial resolution of 1x1cm(2) and demonstrated no hysteresis and real time operation. These attractive operational and mechanical properties meet the requirements of various biomedical applications with respect to human skin pressure measurements, including amputee sockets, shoe sensors, wearable sensors, wheelchair seating-system sensors, hospital-bed monitoring sensors.
我们报告了一种适用于生物医学应用的基于二维光纤的柔性压力传感表面的开发情况。该传感器由嵌入薄聚合物片中的高灵敏度光纤布拉格光栅元件组成，形成一个最小厚度为2.5毫米的2×2平方厘米传感垫，并且易于扩展，以便用作更大表面传感器的构建模块。制造的垫式传感器与一个物理尺寸小的商用询问单元相结合，以增强整个传感系统的便携性。传感器的机械性能能够匹配人体皮肤的特性，其操作性能表现出最大分数压力灵敏度为12MPa⁻¹，空间分辨率为1×1平方厘米，并且无滞后现象且可实时操作。这些吸引人的操作和机械性能满足了各种生物医学应用在人体皮肤压力测量方面的要求，包括截肢者假肢接受腔、鞋内传感器、可穿戴传感器、轮椅座椅系统传感器、医院病床监测传感器。
