Development of Advanced Fiber Optic Sensors and Their Application to Health Monitoring of Civil Infrastructures

先进光纤传感器的开发及其在民用基础设施健康监测中的应用

• 批准号: 13555132
• 负责人: SUGIURA Kunitomo
• 金额: $ 8.45万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555132/
• 关键词: Fiber Optics; Strain Measurement; Temperature Measurement; FBG; Health Monitoring; Evaluation

Monitoring plays an important roll to keep various structures such as bridge, dam and tunnel in service condition and to prolong their life. Monitoring is also essential for safe construction with many uncertainties such as cut slope and underground excavation. In this study, an innovative monitoring system is assessed together with the development of strain and displacement transducer on the basis of fiber optic sensor. This newly proposed system is examined in laboratory and a construction site and it is found that this system can be applicable for various practical purposes. The followings are main conclusions obtained in this study.Fiber Optic Gauge (FOG) is developed as a strain gauge module based on Fiber Bragg Grating (FBG) sensor and the mechanical characteristics are clarified by the tensile and bending test together with the temperature sensitivity test. Clarification of the strain and temperature sensitivity extends the application of FOG to a wider range of temperature. Fib … More er Optic Displacement Device (FODD) is also developed on the basis of FBG sensor attached to vinyl chloride pipe. FBG sensors are installed in the several sections in the pipe with three sensors in each section. This installation of FBG sensors enables FODD to measure displacement and its direction. Interpolation of Spline and polynomial is applied to obtain continuous displacement. It is found that a good displacement measurement can be attained by a constant interval allocation of FBG sensors and application of Spline method particularly when displacement is not monotonous.It is also clarified the influence of the source voltage during the measurement and the local curvature of the data transmission optical fiber. Strain and displacement monitoring system is established on the basis of the various fundamental considerations. This proposed monitoring system is found to be applicable for a longer period of monitoring and for remote-controlled measurement as well. This monitoring system is expected to be applied for various structures for their safety control.However, the handling of fiber optics is very difficult compared to the ordinal resistive strain gauges, so that the proper packing method and the robustness to braking the primary optic fiber should be developed. Less

监测对于桥梁、大坝、隧道等各种结构物的正常使用和延长其使用寿命具有重要作用。监测对于安全施工也是必不可少的，因为有许多不确定因素，如切坡和地下开挖。在这项研究中，一个创新的监测系统进行评估连同开发的应变和位移传感器的光纤传感器的基础上。该系统在实验室和施工现场进行了测试，发现该系统可以应用于各种实际目的。本文的主要研究成果如下：基于光纤布拉格光栅（FBG）传感器，研制了光纤应变计（FOG），并通过拉伸、弯曲试验和温度敏感性试验，研究了FOG的力学特性。应变和温度灵敏度的澄清将FOG的应用扩展到更宽的温度范围。Fib ...更多信息 在光纤光栅传感器的基础上，研制了光纤位移传感器（FODD）。光纤光栅传感器安装在管道的几个部分，每部分有三个传感器。光纤光栅传感器的安装使FODD能够测量位移及其方向。采用样条插值和多项式插值相结合的方法实现位移的连续化。结果表明，当位移不单调时，采用等间距布置光纤光栅传感器和样条函数法可以获得较好的位移测量效果，并分析了测量时源电压和数据传输光纤局部曲率的影响。应变和位移监测系统是建立在各种基本考虑的基础上。该监测系统适用于较长时间的监测和遥控测量。该监测系统有望应用于各种结构的安全控制。然而，与普通电阻应变计相比，光纤的处理非常困难，因此应开发适当的包装方法和对主光纤制动的鲁棒性。少

项目成果

小野紘一, 大島義信, 杉浦邦征: "FBGセンサを用いたひずみ計測用モジュールの開発"応用力学論文集,土木学会. 5. 863-872 (2002)

Koichi Ono、Yoshinobu Oshima、Kuniyuki Sugiura：“使用 FBG 传感器开发应变测量模块”应用力学杂志，日本土木工程师学会 5. 863-872 (2002)。

Ono, K., Oshima, Y. and Sugiura, K.: "Development of a strain measurement module using FBG sensor"Journal of Applied Mechanics, JSCE. Vol.5. 863-872 (2002)

Ono, K.、Oshima, Y. 和 Sugiura, K.：“使用 FBG 传感器开发应变测量模块”应用力学杂志，JSCE。