LabVIEW人工岛基础设施光纤光栅监控系统设计与开发
毕业论文关键词 人工岛 自动化 安全监测 光纤光栅传感器
Title An Optical Fiber Grating Monitoring System for Infrastructure in Artificial Island
bstract With the need of the offshore oil industry, shipping industry and economic development, a number of large-scale artificial islands have been built in China's coastal regions. However, the artificial island structure is affected by various marine environment factors, such as wind, tide, sea ice, storm surges and earthquake, which is more easily damaged than buildings on land. This graduation design provides an optical fiber grating monitoring system for infrastructure in artificial island. Referring to the existing artificial island safety monitoring technology and fiber grating sensing technology, it chooses some monitoring projects such as soil settlement, pore water pressure, earth pressure, dike crack and foundation scour. Also, the system software is designed and developed on LabVIEW platform. It achieves automatic safety monitoring for infrastructure in artificial island during operation, which provides effective data support for grasping the security situation of artificial island accurately in real time.
Keywords artificial island; automation; safety monitoring; optical fiber grating sensor
目次
1绪论.1
1.1选题背景.1
1.2研究现状.1
1.3研究内容.2
1.4研究方法.3
1.5本毕业设计内容结构3
2人工岛基础设施监测技术.5
2.1概述..5
2.2人工岛施工期间安全监测..5
2.3人工岛运行期间安全监测..6
2.4小结..7
3光纤光栅传感技术.8
3.1概述..8
3.2光纤布拉格光栅传感原理..8
3.3光纤布拉格光栅传感器简介..12
3.4小结.13
4人工岛基础设施光纤光栅传感器的布设安装..14
4.1人工岛监测区域工程概况.14
4.2人工岛基础设施监测项目及监测点的选择..14
4.3监测室的线路布设.16
4.4小结.17
5人工岛基础设施光纤光栅监测软件设计开发..18
5.1概述.18
5.2LabVIEW简介18
5.3监测软件算法研究.20
5.4监测软件程序设计.22
5.5小结.29
6人工岛基础设施光纤光栅监测新装置..31
6.1概述.31
6.2装置结构及其工作原理32
6.3装置性能试验设计.35
6.4装置标定试验设计.37
6.5小结.38
结论.40
致谢.42
参考文献..43
1 绪论 1.1 选题背景 随着近海石油工业、港口航运业以及经济发展的需要，在我国沿海相继修建了多个大型人工岛结构。而人工岛结构处于复杂的海洋环境中，受到风浪、潮流、海冰、风暴潮和地震等多种海洋环境因素的共同影响，比陆地上的建筑物更容易受到破坏。历史上人工岛损毁事件屡见不鲜，破坏形式也多种多样，如强风、大浪、风暴潮增水、海冰等恶劣海况造成的围堤防护层破坏、岛面被淹，甚至冲毁整个岛体；或因海底动力环境变化、地震、海底及充填土等地质因素引起的岛体滑移、沉降、断裂等[1-3]。这些作用对人工岛结构是潜在的安全隐患，威胁到岛上人民生命财产安全。 各类人工岛事故发生的时间、部位和破坏方式均有其各自的特点，设计波浪标准偏低和对波浪水动力特性认识不足是结构损坏的主要原因，防护结构和工作条件决定损坏形态与发展[4]。人工岛结构的破坏都伴随着结构异常变形，需要通过安全监测及时获取，对判断灾害体的发展和预警有着重要的技术支持。