光学精密工程2025，Vol.33Issue(14)：2178-2190,13.DOI:10.37188/OPE.20253314.2178
推挽式高灵敏光纤光栅水压传感器研究
Research on push-pull high-sensitivity fiber Bragg grating underwater pressure sensor
摘要
Abstract
In view of the need of high sensitive water level real-time monitoring,we propose and demon-strate a Fiber Bragg Grating(FBG)based accurate water pressure sensor,which relies on the design of a push-pull sensing structure consisting of a dual of FBGs experiencing opposing compression/dilation,inte-grated with other mechanical stress-amplification elements.A composite sensing unit was constructed us-ing a circular elastic membrane,a force transmission rod,a slider,and a pair of FBGs to achieve efficient conversion of pressure optical signals.Based on the elastic mechanics theory modeling and the finite ele-ment simulation analysis,a linear response model between the wavelength offset and the pressure for the dual FBG push-pull sensing system was established.Experimental testing of the sensor established the fol-lowing technical parameters of the sensor:pressure sensing range 0-2 MPa,pressure sensitivity 1 820.05 pm/MPa,linearity 0.69％,repeatability 0.56％,response time 0.55 s,indicating that this sensor has high pressure sensitivity,good stability,fast response speed,and extremely weak creep characteristics.Of especially noteworthy is the insensitivity of the sensor to minute environmental temperature variation,with a temperature sensitivity of 0.000 6 pm/℃.Our research work demonstrated the present approach can not only achieve high sensitivity and large sensing range,but also effectively minimize the cross-sensi-tivity between temperature and pressure,realizing temperature self-compensation and shielding from other environmental perturbations.As this fiber optic sensor is completely passive,without electrical power on the wet-end,and easy to multiplex,it has the potential of playing a decisive role in future oceanic applica-tions.关键词
水压传感器/光纤布拉格光栅/推挽式/压力响应特性/温度不敏感性Key words
underwater pressure sensor/fiber Bragg grating/push-pull/pressure response characteris-tic/temperature insensitivity分类
通用工业技术引用本文复制引用
洪博诚,吴崇坚,于淼,常天英,姜海明,崔洪亮..推挽式高灵敏光纤光栅水压传感器研究[J].光学精密工程,2025,33(14):2178-2190,13.基金项目
国家重点研发计划项目(No.2022YFC3003801) （No.2022YFC3003801）
广东省基础与应用基础研究基金项目(区域联合基金-重点项目)(No.2023B1515120009) （区域联合基金-重点项目）
中国科学院战略性先导科技专项(No.XDC0190403) （No.XDC0190403）
深圳市基础研究重点项目(No.JCYJ20220818101206015,No.JCYJ20220818101609021) （No.JCYJ20220818101206015,No.JCYJ20220818101609021）
