Functional Evolution of Fiber Optic Nerve Systems with Optical Correlation Domain Technique for Structures and Materials that can Feel Pain

通过激光频率调制来操纵干涉特性，实现了对光纤特性(例如散射)的分布式传感，从而发展了最初的“光学相关域技术”的功能。通过将“光纤神经”嵌入到桥梁等结构中，就可以实现“能感觉到疼痛的结构”。我们的技术已经显示出优越的功能，如毫米分辨率、千赫速度和随机可访问性。在本项目中，我们发展了实现应变和温度的同时传感、整个分布式数据的高速采集和高速随机访问的功能。空间分辨率、传感范围和噪声特性也得到了改善。还提出并论证了短长度分布式传感器或光纤布拉格光栅的多路复用。已对包括飞机结构健康监测在内的应用进行了研究，以证明其适用性。

Functions of original "optical correlation domain techniques" have been evolved, which realizes distributed sensing of properties along optical fibers, such as scattering, by manipulating interference characteristics by laser frequency modulation. By embedding the "fiber optic nerves" along structures, for example bridges, "structures that can feel pain" can be realized. Our techniques had demonstrated superior functions, such as mm resolution, kHz speed, and random accessibility. In this project, we have evolved the functions to realize simultaneous sensing of strain and temperature, high speed acquisition of whole distributed data, and high speed random accessibility. Spatial resolution, sensing range, and noise characteristics have also been improved. Multiplexing of short-length distributed sensors or fiber Bragg gratings has also been proposed and demonstrated. Applications, including structural health monitoring for aircrafts, have been studied to prove the applicability.