压差式光纤光栅静力水准仪的设计与研究  

Design and Study on Differential Pressure Fiber Grating Static Level Meter

作　　者：覃荷瑛[1,2] 赖丹萍 周文龙 QIN Heying;LAI Danping;ZHOU Wenlong(Guangxi Engineering Research Center of Intelligent Structural Material,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学广西壮族自治区智慧结构材料工程研究中心,广西桂林541004 [2]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004

出　　处：《压电与声光》2024年第1期54-60,共7页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(52068014);广西创新驱动发展专项(桂科AA 20302006)。

摘　　要：为实现对建筑结构不均匀沉降的有效监测,基于光纤光栅与连通器的基本原理,该文设计了一种压差式光纤光栅静力水准仪,并对该水准仪进行了理论推导、标定试验及静态特性分析。试验结果表明,该水准仪灵敏度为6.5 pm/mm,线性拟合度R^(2)为0.999,非线性误差为1.48%,迟滞性误差为0.74%,重复性误差为5.72%,总精度为5.95%。为增大该水准仪灵敏度特性,对原有的波纹膜片改进与分析,结果表明,改进后的水准仪灵敏度为11.87 pm/mm,较改进前提升了约1.8倍。该结构形式的水准仪可对建筑物的沉降进行有效监测,为建筑物结构健康监测提供有效的技术支持。In this paper,a differential pressure fiber Bragg grating(FBG)static level meter is designed based on the basic principles of FBGs and connectors to achieve accurate and effective monitoring of the uneven settlement of building structures.The theoretical derivation,calibration tests and static characteristic analysis of the level meter are carried out.The experimental results show that the sensitivity of the level meter is 6.5 pm/mm,the linear fitting degree R^(2)is 0.999,non-linear error is 1.48%,hysteresis error is 0.74%,and repeatability error is 5.72%,resulting in a total accuracy of 5.95%.In order to increase the sensitivity of the level meter,the original corrugated diaphragm was improved and analyzed.The results showed that the sensitivity of the improved level meter was 11.87 pm/mm,which was about 1.8 times higher than the unimproved one.The settlement of buildings has been effectively monitored by using this type of level meter structure,providing effective technical support for the health monitoring of building structures.

关 键 词：结构健康监测 光纤BRAGG光栅 不均匀沉降 静力水准仪 监测性能 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]