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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

结构炉膛监测（SHM）已成为全球基础设施工程界最关心的问题之一。成功的SHM计划的实施需要选择和放置适合于测量影响结构系统性能和健康的关键参数的传感器。光纤传感器在许多情况下提供了灵活性和实用性，其中常规传感器要么不能够进行适当的测量。此外，光纤传感器能够进行分布式测量，并且可以串行多路复用，这又减少了穿过结构的引线的数量。在过去的二十年中，许多光纤传感器类型和配置已经变得可用，包括本地化，长规格和分布式传感器。基于分布式和串行复用光纤传感技术的大尺寸结构和分区结构健康监测系统的建立 ...更多信息建筑材料的多样性是一个令人期待的热门话题。本研究致力于发展一些关键的传感，损伤表征和诊断方法的基础设施，如混凝土结构的SHM基于分布式和串行复用光纤传感技术。1）研究了基于散射的分布式传感技术（BOTDR等）的应变和裂纹分布测量原理和特点;被调查和检查清楚。此外，本文还提出了提高空间分辨率和测量精度以及滤除测量噪声的有效安装方法。另一方面，在一项研究中，提出了一种基于光纤光栅传感器串联复用的分布式传感方法，将光纤光栅传感器设计成变标距的长标距传感器; 2）对FRP加固PC梁、梁等不同类型结构的静动力响应进行了分布式远程监测; 3）基于神经网络和非线性有限元的框架结构分布式损伤表征方法，桥梁和混凝土隧道衬砌具有复杂的非线性或裂缝分布。此外，本研究亦尝试发展相应的感测-计算-诊断系统。少