新型高准确度光纤光栅压力传感系统  

A New Type of Fiber Grating Pressure Sensing System with High Accuracy

作　　者：胡志新[1] 朱军[2] 张陵[1] 

机构地区：[1]西安交通大学建力学院,西安710049 [2]长安大学工程机械学院,西安710061

出　　处：《光子学报》2006年第5期709-711,共3页Acta Photonica Sinica

基　　金：陕西省自然科学基金(2000C34)资助项目

摘　　要：提出一种使用光纤双布喇格光栅测定压力的测量方法．在外界压力作用下，传感光纤布喇格光栅反射波长的漂移，被转变成在交变力策动下，发生弯曲的等强度悬臂粱调制扫描光栅反射光脉冲间隔的变化．实验结果表明，光纤布喇格光栅反射波长漂移的测量范围为0～3nm,波长测量的不确定度为1pm；压力传感器的量程为0～6MPa时，压力的测量不确定度为0．005MPa．In order to improve the accuracy of fiber Bragg grating （FBG） pressure sensor and decrease the cost of the whole system, a measuring method of using the fiber Bragg dual-grating to measure the pressure is proposed in this paper. Under the action of external pressure, the reflected wavelength drift of the sensing FBG is transformed into time interval variation of light pulse reflected by a scanning grating, which is modulated by means of driving the equally intense cantilever beam into up and down bending periodically. The experimental result shows that the detecting range for the reflected wavelength drift of FBG is 0-3 nm, the uncertainty of wavelength detection is 1 pm, and the uncertainty of the pressure measurement is 0. 005 MPa when the measurement range of the pressure sensor is 0-6 MPa.

关 键 词：光纤光学 光纤布喇格光栅 动态解调 压力测量 

分 类 号：TN25[电子电信—物理电子学]