光纤光栅位移传感器研究与不确定度分析  

Fiber Grating Displacement Sensor Research and Its Uncertainty Analysis

作　　者：于涛[1] 陈玉璞 张启明[1] 张高伟 张鑫[1] YU Tao;CHEN Yupu;ZHANG Qiming;ZHANG Gaowei;ZHANG Xin(School of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong,China)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《实验室研究与探索》2023年第6期42-45,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(52174146)。

摘　　要：为实现大跨度地下工程结构的长期健康监测,设计了一种光纤光栅位移传感器。该设计将等强度梁特性与光纤光栅传感原理相结合,弹簧作为转换元件,等强度梁和光纤光栅作为传感元件。在此基础上进行了理论分析,推导了灵敏度系数计算式,并进行了标定实验及分析,结果表明:设计的光纤光栅位移传感器可以实现两点位测量;有效监测量程为180 mm,传感器的灵敏度为10.16 pm/mm,分辨率可达98μm,线性度为3.2%,重复性为4.32%,迟滞性为2.52%,静态误差为5.92%,线性相关度可达0.998,静态特性良好;实验平台不确定度为0.827 9 mm,在量程范围内不确定度对结果的影响较小,满足性能要求。该设计适用于精度要求较高且需要多点位测量的工作环境,应用前景良好。A fiber grating displacement sensor is designed for long-term health monitoring of large-span underground engineering structures.The design combines the characteristics of equal-strength beam with the sensing principle of fiber grating,a spring is used as the conversion element and equal-strength beam and fiber grating as the sensing element.Based on theoretical analysis,the sensitivity coefficient calculation formula derived,calibration experiments and analysis conducted.The results show that the designed fiber grating displacement sensor can achieve two-point measurementthe effective monitoring range is 180 mm,the sensitivity of the sensor is 10.16 pm/mm,the resolution can reach 98μm,the linearity is 3.2%,the repeatability is 4.32 The linearity is 3.2%,repeatability is 4.32%,hysteresis is 2.52%,static error is 5.92%,linear correlation can reach 0.998 experimental platform uncertainty is 0.8279 mm n the range uncertainty meet the performance requirements.The design is suitable for the working environment with high accuracy requirements and the need for multi-point measurement,and has good application prospects.

关 键 词：光纤光栅 等强度梁 位移传感器 静态特性 不确定度分析 

分 类 号：TN253[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]