摘要
光纤光栅传感技术近年来越来越多地被应用于土木工程领域,并逐渐显现出了其优势,但对结构振动的测试,尚缺少较为成熟可靠的光纤光栅加速度传感器。提出一种新型的光纤光栅加速度传感器设计方案,其具有高灵敏度和温度自补偿的特性,能够满足结构测试中低频、微幅振动,并克服温度的影响。介绍了传感器的原理,及进行的参数优化,在保证量程和量测频率范围的前提下使灵敏度达到了最大;还对所设计的传感器进行了有限元分析,得到了其幅频、相频、灵敏度、线性度等特性,有限元计算结果和理论优化值相符合。
In recent years,the Fiber Bragg Grating （FBG） sensing technique has been increasingly applied in civil engineering structures. However, it is still lacking of a reliable FBG accelerometer for structural vibration measurement. For the practical requirement, this paper proposed a novel design of FBG accelerometer. This sensor has high sensitivity at a low frequency range in which the natural modes of civil engineering structures are concerned. The temperature influence can be self-compensated. Comprehensive parameter optimization was conducted to improve the sensor＇ s sensitivity in a working range and frequency. Finite Element Method （FEM） analysis was done to study amplitude-frequency and phase-frequency relationships,as well as sensor＇ s sensitivity and linearity. The results showed the agreement with the theoretical ones.
出处
《结构工程师》
2009年第2期141-146,共6页
Structural Engineers
基金
国家自然科学基金重点项目(50538020)
上海市科委登山计划项目(062112007)
教育部高等学校科技创新工程重大项目培育资金项目(704019)
关键词
光纤光栅
加速度传感器
方案设计
灵敏度
温度自补偿
参数优化
FBG, accelerometer, design, sensitivity, temperature self-compensation, parameter optimization
