光通信技术2026，Vol.50Issue(2)：48-53,6.DOI:10.13921/j.cnki.issn1002-5561.2026.02.008
基于菱形敏化结构的膜片式FBG土压力传感器
Diaphragm-type FBG earth pressure sensor based on rhombic sensitized structure
摘要
Abstract
To address the accuracy degradation of traditional earth pressure sensors caused by temperature and electromagnetic interference in long-term monitoring,a diaphragm-type fiber Bragg grating(FBG)earth pressure sensor based on a rhombic sensitized structure is designed.The sensor uses a circular diaphragm for pressure sensing,transmits pressure through the rhom-bic structure,and employs two FBGs in series on the strain beam and temperature compensation beam to achieve pressure mea-surement and temperature compensation.The design is validated by theoretical analysis and Ansys finite element simulation,followed by experimental testing.Results show good linearity from 0 to 2 MPa with a sensitivity of 981.87 pm/MPa,effective temperature compensation from-10 ℃ to 50 ℃,and wavelength fluctuation within±5 pm during a 3-hour creep test,meeting the requirements for long-term accurate earth pressure monitoring.关键词
光纤布喇格光栅/土压力传感器/菱形敏化结构/温度补偿/有限元分析Key words
fiber Bragg grating/earth pressure sensor/rhombic sensitized structure/temperature compensation/finite element analysis分类
信息技术与安全科学引用本文复制引用
李美丽,崔卫星,牛亮,冯元..基于菱形敏化结构的膜片式FBG土压力传感器[J].光通信技术,2026,50(2):48-53,6.基金项目
重庆教育委员会科学研究项目基金(KJZD-K202202401)资助 （KJZD-K202202401）
教育部供需对接就业育人项目基金(20230104156)资助. （20230104156）
