基于反射谱带宽展宽的FBG温度补偿压强传感  

Study of Temperature Compensated FBG Pressure Sensor Based on Widened Bandwidth

作　　者：尉婷[1] 乔学光[1] 贾振安[1] 傅海威[1] 王宏亮[1] 

机构地区：[1]西安石油大学陕西省光电传感测井重点实验室

出　　处：《光电子．激光》2007年第4期418-421,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"发展计划资助项目(2002AA313150);国家自然科学基金资助项目(69877025);国家教育部科学技术重点资助项目(02190);西安石油大学青年创新科技基金资助项目(40)

摘　　要：利用平面圆形膜片应变调谐的特点,采用膜盒式结构,将光纤Bragg光栅（FBG）沿径向贴于平面圆形膜片,利用反射波的带宽对压强敏感而对温度不敏感的特性解调压强,成功实现了温度补偿的压强传感测量.基于光谱分析仪（OSA）的0.05 nm分辨率,实验可得到测量系统的带宽随压强变化的灵敏度为0.28 nm/MPa,压强分辨率为±0.18 MPa,压强动态测量范围可达0.0～7.2 MPa.实验结果与理论分析相符.A novel temperature compensated FBG pressure sensor based on round metal diaphragm is presented and studied theoretically and experimentally. FBG was affixed along the radius of diaphragm. The pressure was measured by the bandwidth of FBG because the bandwidth action is insensitive to temperature. This approach showed a pressure resolution of ±0.18 MPa and a pressure sensitivity of 0.28 nm/MPa in the range 0.0 MPa to 7.2 MPa when the spectral resolution is 0. 05 nm for spectral analyzer. The experimental results match the theoretical analysis well.

关 键 词：光纤Bragg光栅(FBG) 温度补偿压强传感 啁啾效应 带宽 

分 类 号：TN253[电子电信—物理电子学] TP212.14[自动化与计算机技术—检测技术与自动化装置]