Fiber optic distributed sensing techniques with high spatial resolution and high performance for smart materials, structures and communication networks.

具有高空间分辨率和高性能的光纤分布式传感技术，适用于智能材料、结构和通信网络。

• 批准号: 13002003
• 负责人: HOTATE Kazuo
• 金额: $ 122.3万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Specially Promoted Research
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13002003/
• 关键词: SMART MATERIALS and STRUCTURES; OPTICAL COMMUNICATION NETWORKS; DISTRIBUTED OPTICAL FIBER SENSORS; OPTICAL FIBER SENSORS; OPTICAL COHERENCE CONTROL; DISASTER PREVENSION TECHNOLOGIES

Research subjects originally scheduled in this project have enough been done, and some new subjects have also been added and performed. As for the first subject "Fiber optic distributed strain sensing technique by use of stimulated Brillouin scattering generated locally along the fiber," dynamic strain sensing function has been introduced. The sampling rate obtained is 57Hz, which is 10,000 time faster than conventional time domain technologies. In vibration measurement using a building model, multiple points, simultaneous and dynamic strain sensing has been done for the first time. Clack in concrete with sub-mm width has also been measured for the first time, utilizing cm-order spatial resolution of this technique. This technique is only one that can measure distributed strain along a fiber with cm-order spatial resolution and several tens of Hz sampling-rate. These functions are creating new diagnostic algorithm for materials and structures. A way for simplifying the system, a scheme … More for elongating the measurement range, a way for measuring simultaneously strain and temperature, and a scheme for realizing quite a high spatial resolution have also been proposed and experimented. As for the second subject "Fiber optic distributed lateral stress measurement by synthesis of optical coherence function," the spatial resolution has been improved as about 40 times to be 20cm. A simplified system has also been realized. As for the third subject "Diagnostic system for fiber to the home networks," measurement range has been improved. At the end of 5km length fiber, reflectivity distribution has been measured with about 10cm spatial resolution and 1km measurement range. As for the forth subject "Related sensing technologies," a system for multiplexing FBG's with the same Bragg wavelength has newly been developed by the use of synthesis of optical coherence function technique (SOCF). Sampling rate of 100Hz and random access capability has been realized. A FBG multiplexing system using a fiber laser with multiple lasing wavelengths, scheme for controlling characteristics of EDF dynamic grating by SOCF, a system for measuring vibration distribution along a fiber, and so on, have also been proposed and developed. Through this research project, novel techniques of fiber optic nerve systems for smart materials, structures and communication networks have been successfully developed. Less

原定于该项目计划的研究对象已经完成了足够的工作，并且还添加了一些新主题。至于第一个主题“通过使用沿着纤维本地产生的刺激的布里鲁因散射来使用光纤分布的应变灵敏度技术”，已经引入了动态应变敏感性功能。获得的采样率为57Hz，比常规时域技术快10,000时间。在使用建筑模型的振动测量中，首次进行了多个点，简单而动态的应变感应。还使用了该技术的CM级空间分辨率，还首次测量了具有亚MM宽度的混凝土脱衣舞冰片。该技术只是可以沿着CM级空间分辨率和几十Hz采样率的纤维测量分布的应变。这些功能正在为材料和结构创建新的诊断算法。简化系统，一种方案……更多用于拉长测量范围，一种测量同时应变和温度的方法以及实现相当高的空间分辨率的方案，也提出了和实验。至于第二个受试者“通过合成光学相干函数的光纤分布分布的横向应力测量”，空间分辨率已改善约40倍，为20厘米。简化的系统也已经实现。至于第三个主题“纤维诊断系统到家庭网络”，测量范围已得到改善。在5 km长度纤维的结束时，已经用约10厘米的空间分辨率和1km的测量范围测量了反射率分布。至于第四个主题“相关传感技术”，通过使用光学相干函数技术（SOCF）的合成，已新开发了用于将FBG与相同波长多样化的系统的系统。已经实现了100Hz的采样率和随机访问能力。使用具有多个激光波长的纤维激光器的FBG多路复用系统，SOCF控制EDF动态光栅特性的方案，该系统也已提出和开发，用于测量沿光纤的振动分布等。通过该研究项目，成功开发了针对智能材料，结构和通信网络的光纤神经系统的新技术。较少的

项目成果

K.Hotate: "Application of synthesized coherence function to distributed optical sensing"IOP Measurement Science and Technology. Vol.13, No.11, Nov.. 1746-1755 (2002)

K.Hotate：“合成相干函数在分布式光学传感中的应用”IOP测量科学与技术。

K.Hotate: "Handbook of Photonic Information Technology (Ed. by T.Kamiya, Y.Arakawa, H.Ishio, M.Ohtsu, T.Mukai, M.Yamada and Y.Yamamoto)"Corona Publishing Co.Ltd.. (2003)

K.Hotate：“光子信息技术手册（T.Kamiya、Y.Arakawa、H.Ishio、M.Ohtsu、T.Mukai、M.Yamada 和 Y.Yamamoto 编）”Corona Publishing Co. Ltd.。

K.Hotate: "Application of synthesized coherence function to distributed optical sensing"IOP Measurement Science and Technology. 13・11. 1746-1755 (2002)

K.Hotate：“综合相干函数在分布式光学传感中的应用”IOP测量科学与技术1746-1755（2002）。

K.Hotate, M.Kashiwagi: "High spatial resolution reflectometry for optical subscriber networks by synthesis of optical coherence function with measurement range enhancement"IEICE Trans. on Electronics. E86-C・2. 213-217 (2003)

K.Hotate、M.Kashiwagi：“通过光学相干函数与测量范围增强的综合实现光学用户网络的高空间分辨率反射测量”IEICE Trans on Electronics。

K.Hotate, M.Enyama, S.Yamashita, Y.Nasu: "A multiplexing technique of fiber Bragg grating sensors with the same reflection wavelength by the synthesis of optical coherence function"Measurement Science and Technology. Vol.15, No.1, Jan.. 148-153 (2004)

K.Hotate、M.Enyama、S.Yamashita、Y.Nasu：“通过合成光学相干函数实现具有相同反射波长的光纤布拉格光栅传感器的复用技术”测量科学与技术。