Development of Structural Health Monitoring System by using Distributed Optical Fiber Sensing

利用分布式光纤传感开发结构健康监测系统

基本信息

批准号：
15360228
负责人：
WU Zhishen
金额：
$ 8.77万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15360228/
关键词：
Infrastructure Structural Health Monitoring Distributed Optical Fiber Sensing BOTDR FBG Damage detection Real-time diagnosis system Wire-less sensing

项目摘要

Structural hearth monitoring (SHM) has become one of the most particular concerns of infrastructure engineering community worldwide. Implementation of successful SHM programs requires selection and placement of sensors suitable for measurement of key parameters that influence the performance and health of the structural system. Fiber optic sensors provide flexibility and practicality in many situations, where the conventional sensors are either not capable of feasible to make the appropriate measurements. Furthermore, fiber optic sensors are capable for making distributed measurements and can be serially multiplexed and this in turn reduces the number of leads running through structures. Many fiber optic sensor types and configurations have become available over the past two decades, including localized, long gauge and distributed sensors. The establishment of SHM systems based on distributed and serially multiplexed fiber optic sensing technologies for large size of structures and div … More ersity of construction materials is an intense subject with great anticipation. This study is devoted in developing some key sensing, damage characterization and diagnostic methods for SHM of infrastructure such as concrete structures based on distributed and serially multiplexed fiber optic sensing technologies. It can be summarized as follows :1)The measurement principles and characteristics of strain & cracking distributions for brilliouin scattering based distributed sensing (BOTDR etc.) are investigated and examined clearly. Moreover, some effective installation approaches to improve the spatial resolution and accuracy and to filter the measurement noise are proposed in this study. On the other hand, a distributed sensing approach based on serially multiplexed FBG sensor is also proposed in which the FBG sensors are designed as a long-gauge manner with a variable gauge length.2)Distributed and remote monitoring both for static and dynamic responses of different types of structures including FRP-strengthened PC girder and beam-column assembly based above proposed distributed fiber optic sensing methods are investigated and discussed.3)Some kinds of distributed damage characterization methods based on neural networks and nonlinear FEM for frame, bridge and concrete tunnel linings with complex nonlinearity or crack distribution are proposed. Moreover, some attempts of developing the corresponding sensing-computational-diagnostic systems are made also in the study. Less

结构性壁炉监测（SHM）已成为全球基础设施工程社区最特别的关注点之一。成功的SHM程序的实施需要选择和放置传感器，适合测量影响结构系统性能和健康的关键参数。光纤传感器在许多情况下提供了灵活性和实用性，在许多情况下，传统传感器可能无法可行地进行适当的测量。此外，光纤传感器能够进行分布式测量值，并且可以串行多样化，这反过来又减少了通过结构运行的导线数。在过去的二十年中，许多光纤传感器类型和配置已获得，包括局部，长量规和分布式传感器。基于分布式和串行多路复用的光纤传感器技术的SHM系统建立用于大型结构和Div的技术……更多的建筑材料是一个充满期望的强烈主题。这项研究致力于开发一些关键传感器，损伤表征和基础设施SHM的诊断方法，例如基于分布式和串行多重的光纤灵敏度技术的混凝土结构。可以总结如下：1）研究并清楚地检查了基于Brilliouin散射的分布敏感性（BOTDR等）的应变和开裂分布的测量原理和特征。此外，在本研究中提出了一些有效的安装方法，以提高空间分辨率和准确性并过滤测量噪声。 On the other hand, a distributed sensor approach based on serially multiplexed FBG sensor is also proposed in which the FBG sensors are designed as a long-gauge manner with a variable gauge length.2)Distributed and remote monitoring both for static and dynamic responses of different types of structures including FRP-strengthened PC ribbon and beam-column assembly based above proposed distributed fiber optic sensitivity methods are investigated and discussed.3)Some提出了基于神经网络的分布式损伤表征方法和具有复杂非线性或裂纹分布的框架，桥梁和混凝土隧道衬里的非线性FEM。此外，在研究中也进行了一些尝试开发相应的传感计算诊断系统的尝试。较少的