摘要
在测量结构应变和变形时,传统的电阻应变片测试技术和新型的光栅布拉格光纤传感技术(FBG)、布里渊光时域反射技术(BOTDR)三者均具有不同的监测原理。设计并进行了基于这三种监测技术的简支梁弯曲试验,测试结构应变,对比结构挠曲变形,分析了三种监测技术在应变测量中的精度、灵敏度、布设工艺和适用性等,评价了两种光纤传感技术用于结构挠曲变形测试的特性。为选择土木工程结构监测手段提供参考依据,对进一步研究、开发新型应变传感器和监测仪具有参考价值。
When the strain and deformation of the structure were measured,the three methods,the traditional resistive strain gauge,fiber bragg grating（FBG）and brillouin optical time domain reflection（BOTDR）have different principles. Based on these three monitoring technology,a bend test of simply supported beam was designed,then the strain and the deflection of the simply supported beam were gained. Through comparing the calculation and the measurement deflection,the accuracy and sensitivity of the three kinds of monitoring technology in the strain and deflection test were analyzed. At the same time,the characteristics of these two kinds of optical fiber sensing technology were evaluated. It provides reference basis for choosing better methods in the civil engineering monitoring ,and it worth of researchment and development for the new strain sensor and monitor.
出处
《传感技术学报》
CAS
CSCD
北大核心
2015年第8期1149-1154,共6页
Chinese Journal of Sensors and Actuators
基金
国家重点基础研究发展计划项目(2011CB013501)
长江学者和创新团队发展计划项目(IRT0812)
关键词
土木工程
应变
简支梁弯曲试验
电阻应变片
光纤布拉格光栅
布里渊光时域反射技术
civil engineering
strain
bend test of simply supported beam
resistance strain gage
fiber bragg grating
brillouin optical time domain reflection
作者简介
丁梓涵（1990-），女，硕士研究生，主要从事地质工程方面的研究，1325670994@qq．com
赵其华（1965-），男，教授，博士生导师，同济大学博士后，主要从事岩土工程、地质工程方面的研究，zhqh310@qq．com。
