结构健康监测光纤光栅位移计的研制
摘 要：结构健康监测对保证结构的长期安全运行具有重要的意义，而位移监测是测量技术中最基本的测量项目之一，是多种物理量测量的基础（如：振动、压力、应变、加速度等）。光纤光栅是目前在智能材料系统与结构健康监测研究与应用最为广泛的敏感材料之一，具有分布式绝对测量、抗腐蚀能力强等优点。本文基于光纤光栅的应变测量原理，设计开发出一种新颖的位移传感装置，详细推导和试验验证了该装置的传感特性。研究结果表明，该装置具有温度自补偿、线性度和重复性好、精度较高等优点，具有良好的应用前景。
关键词：结构健康监测；位移；光纤光栅；温度自补偿
abstract：structural health monitoring is very important to ensure the safe of the structure in a long period. however the displacement monitoring is one of the most basic measuring items and it is the foundation of the measure of other physics quantities (such as: vibration、pressure、strain、acceleration and so on). fiber bragg grating(fbg) with advantages of quasi—distribution absolute measurement，high corrosion resistance，etc，has become one of the most popular sensing element for intelligent materials system and structural health monitoring. in this paper，a novel displacement cell based on fbg was developed．its sensing properties was theoretically analyzed and tested by experiments．the research results show that the fbg-based displacement cell has good 1inearity，repetition，immunity of temperature changes．such kind of fbg-based displacement cell shows great prospect for practical applications．
keyword: structural health monitoring；displacement；fiber bragg grating； temperatureselfcompensation
中图分类号：tp212 文献标识码：a 文献标识码： a 文章编号：
1. 引 言
结构健康监测是土木工程学重要研究领域，其发展对认识结构的破坏机理，识别和修正计算模型，最终提高结构防灾减灾能力具有重要意
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