李 薇, 侯 睿,张志俊.准分布式FBG对应变和温度双参数分离测量的实现[J].中南民族大学学报自然科学版,2017,(4):84-87
准分布式FBG对应变和温度双参数分离测量的实现
The Implementation of Two-Parameter Measurement of Strain and Temperature Using Quasi-Distributed FBG
  
DOI:
中文关键词: 准分布式  光纤布拉格光栅  双参数测量
英文关键词: quasi-distributed  FBG  two-parameter measurement
基金项目:国家自然科学基金资助项目(61503418); 中央高校基本科研业务经费项目(CZY15008)
作者单位
李 薇, 侯 睿,张志俊 中南民族大学 计算机科学学院武汉 430074 
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中文摘要:
      为解决光纤 Bragg光栅(FBG)的应变与温度交叉敏感问题,提出了一种将两个参数相同的FBG分别放置于承重梁上下两端面同时感知应变与温度的方法,通过理论分析计算,实现了应变、温度双参数传感的目的.该方法既克服了传统双参数分离方法的各种限制,又简化了分离算法.标定与测量实验结果表明: 在温度 0-100℃、应变0-40MPa 范围内,FBG 的应变与温度响应曲线呈现良好的对应关系,最大相对误差分别为3.7% 和4.2%.应变与温度分离测量方案简单易行,将其应用于准分布式应变定位领域,可以实现应变位置的识别与预警, 具有较高的实际应用价值.
英文摘要:
      In order to solve the cross sensitivity problem of strain and temperature measurement existing in Fiber Bragg Grating, a scheme that implement two-parameter measurement of strain and temperature by placing two FBG at upper and lower end face of a bearing beam is presented. This scheme can both overcome the restriction of traditional two-parameter measurement method and simplify the separation algorithm. Calibration and measurement experiments results indicated that the response curves of strain and temperature demonstrate good corresponding relationship in the range of 0~100 ℃ and 0~40 MPa, and the maximum error is 3.7% and 4.2% respectively. This scheme is feasible to locate the position of strain point in quasi-distributed FBG,and has high application value.
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