摘要
针对现有高温高压油井下对温度和压力的实时长期监测要求，设计了温度补偿式光纤光栅温度压力双参量传感系统。根据传感器的使用环境，优选了恒弹性合金。采用优选后的恒弹性合金作为基底材料设计了圆筒与圆形膜片组合式传感器结构，圆形膜片是整体加工成型的。最后，对传感器进行相关实验测试。实验测试与误差分析结果显示，传感器实现了温度和压力的大量程测量，传感特性呈单值线性，温度补偿可一体化封装；温度线性检测区为0～350℃，温度灵敏度为0．0201nm／℃，温度测量静态误差为0．029％；压力线性检测区为0～60MPa，压力灵敏度为0．0136nm／MPa，压力测量静态误差为0.046％，这些指标能够满足实际工程的要求。
With the aim to serve in bad environments and to meet the requirements of real-time and long-term service, a new kind of double parameters and high temperature-pressure fiber Bragg grating （FBG） sensor with a temperature-compensator was put forward. Firstly,the constant elasticity alloy was selected based on the special environments for the sensor. Then, a new kind of structure combined with a circular cylinder and a circular diaphragm was designed by taking the optimized constant elasticity alloy as the substrates. Finally, three experiments of temperature, pressure and temperature-pressure were performed. Experimental results indicate that the sensor not only has great temperature and pressure detection ranges, but also can realize the linear measurement within the ranges of 0-60 MPa and 0-350℃. The experiments offer the pressure sensitivities in 0. 013 6 nm/MPa, temperature sensitivity in 0. 020 1 nm/℃, and the static errors in 0. 046% and 0. 029%,respectively. These indicators can meet the requirements of practical engineering applications.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2011年第3期545-551,共7页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.60727004)
国家863高技术研究发展计划资助项目(No.2007AA03Z413)
关键词
光纤光学
光纤光栅
封装
高温高压
温度压力传感器
fiber optics
optical fiber grating
encapsulation
high-temperature and high-pressure
temperature-pressure sensor
