光学精密工程2026，Vol.34Issue(5)：711-721,11.DOI:10.37188/OPE.20263405.0711
高灵敏度空间倾斜测量光纤光栅传感器
Circumferential tilt measurement FBG sensor with high sensitivity
摘要
Abstract
To meet the technical requirements for multidirectional structural tilt measurement in practical engineering,a high-sensitivity circumferential fiber Bragg grating(FBG)tilt sensor was developed,ac-companied by systematic theoretical analysis and laboratory validation.A combined lug-boss and groove structural design was adopted to enhance the strain response of cantilevered equal-strength beams.Two or-thogonally arranged sensitized equal-strength beams enable synchronous sensing of two-dimensional spatial inclination.By applying differential signal processing to the central wavelength shifts of two FBGs mount-ed on opposite sides of the beam,temperature-induced effects are effectively eliminated while the measure-ment sensitivity is further improved.Experimental results indicate that the sensor exhibits sensitivities of 81.234 pm/(°)and 85.235 pm/(°)in the XOZ and YOZ planes,respectively,with linearity exceeding 0.999 79,a resolution better than 0.01°,measurement accuracies of 0.024 6%F.S.and 0.023 5%F.S.,and a measurement range of±30°.Spatial performance tests further demonstrate that stable and re-liable monitoring capability is maintained under two-dimensional tilt conditions.In addition,the sensor shows excellent repeatability(repeatability errors of 0.843% and 0.016%,respectively),low hysteresis(0.158% and 0.945%,respectively),and strong resistance to creep.These results indicate that the pro-posed sensor can provide high-precision and highly reliable tilt data for structural safety monitoring under complex working conditions,demonstrating significant potential for applications in engineering structural health diagnosis.关键词
光纤传感器/光纤光栅/倾角传感器/空间倾斜测量/增敏型等强度梁Key words
fiber optic sensor/fiber Bragg grating(FBG)/inclination sensor/spatial tilt measurement/sensitized equal strength beam分类
信息技术与安全科学引用本文复制引用
郑勇,王年强,姜兴良,吴澎..高灵敏度空间倾斜测量光纤光栅传感器[J].光学精密工程,2026,34(5):711-721,11.基金项目
国家重点研发计划资助项目(No.2023YFB2604700) （No.2023YFB2604700）
国家自然科学基金资助项目(No.52108304) （No.52108304）
重庆市研究生联合培养基地建设项目(No.JDLHPYJD2022004) （No.JDLHPYJD2022004）
