一种测量温度和流速的光纤光栅传感器  

Fiber Bragg grating sensor for detecting temperature and flow-velocity

作　　者：禹大宽[1] 乔学光[1] 贾振安[1] 王敏[1] 

机构地区：[1]西安石油大学光纤传感实验室,西安710065

出　　处：《应用光学》2006年第3期228-231,共4页Journal of Applied Optics

基　　金：国家高技术863研究发展计划项目(2002AA313150);国家自然科学基金资助项目(60177028);陕西省科技攻关项目(2003K05-G23);陕西省教育厅项目(02JK158)

摘　　要：提出一种基于铝片的测量温度和流速的光纤布喇格光栅（FBG）传感器。采用一种耐高温胶将光纤布喇格光栅封装在一小铝片上，经过高温固化处理，可保持光纤光栅传感器的稳定性。通过-20℃～100℃温度实验，得到该传感器的温度灵敏度系数为0．0392nm／℃，是封装前的3．5倍，且传感器温度响应保持了很好的线性和重复性。从水温14．5℃时的流速实验中得到水流速在0～20m／s范围变化时，FBG峰值波长漂移了0．13nm，验证了此光纤光栅传感器测量流速的可行性。试验结果表明，该传感器既可以作为温度传感器，又可以作为流量传感器，并且制作简单，成本较低。A novel aluminum plate based fiber Bragg grating （FBG） sensor is proposed to detect temperature and flow-velocity. Fiber Bragg grating （FBG） was sealed on an aluminum plate by a high-temperature-resistant glue, then placed in a thermostat for solidification so as to retain the stability of FBG. The temperature and flow-velocity sensing characteristics of the encapsulated FBG sensor were theoretically and experimentally studied. Encapsulated FBG sensor was placed in a digital thermostat to detect its temperature characteristics. In the temperature range of -20℃～100℃, the experiment result indicates that the temperature sensing sensitivity coefficient of encapsulated FBG sensor is 0. 039 2 nm/℃ and is 3.5 times as much as that of bare FBG. The temperature response curve of the encapsulated FBG sensor keeps very good linearity and repetition. In the flow-velocity experiment, the reflection peakwavelength of the encapsulated FBG sensor moved 0. 13 nm when the flow-velocity changed from 0 to 20 m/s with constant water temperature at 14. 5 C. So it is feasible to use the encapsulated FBG sensor to detect the flow-velocity. The result proves that the aluminum plate encapsulated FBG sensor can detect temperature and flow-velocity. The encapsulated FBG sensor is easy to make, cost effective and practical.

关 键 词：光纤布喇格光栅 传感器 铝封装 温度传感 流速传感 

分 类 号：TN253[电子电信—物理电子学] TP212.11[自动化与计算机技术—检测技术与自动化装置]