传感技术学报2018，Vol.31Issue(5)：664-669,6.DOI:10.3969/j.issn.1004-1699.2018.05.002
一种基片式光纤光栅应变增敏传感器
A Substrate-Type Fiber Bragg Grating Strain Sensor with Enhanced Sensitivity
摘要
Abstract
This paper proposed a substrate-type sensitivity enhanced fiber Bragg grating(FBG)strain sensor based on the principle of lever,to improve the defect of the traditional bare FBG strain sensor which has a low strain sensi-tivity. The designed sensor has a significant strain amplification mechanism. The strain measurement precision and stability of the developed sensor are better than the bare FBG strain sensor. The theoretical sensing model of the de-signed strain sensor was developed,and the sensing characteristic of the sensor was analyzed through finite element method( FEM) . The cantilever calibration experiments show that the experimental sensitivity of designed FBG strain sensor is 6.122 pm/με,which is consistent with the theoretical results. The linearity of the sensor is 0.99998. The designed FBG strain sensor's dynamic response was studied through the dynamic vibration experiment. The experi-mental results show that this sensor keeps consistent enhancement effect when testing the dynamic strain in the range of 0～100 Hz. This sensor has a potential application prospect in the health monitoring and fault diagnosis of large machinery and equipment.关键词
光纤光栅(FBG)应变传感器/应变增敏/杠杆结构Key words
fiber Bragg grating/strain sensor/enhanced strain sensitivity/lever structure分类
信息技术与安全科学引用本文复制引用
谭跃刚,陈宜炀,李瑞亚,毛健..一种基片式光纤光栅应变增敏传感器[J].传感技术学报,2018,31(5):664-669,6.基金项目
国家自然科学基金项目(51475343) （51475343）
