微弯光纤气压传感器研究  

Study on Micro-Bend Fiber Optic Pressure Sensor

作　　者：吴丽双[1] 

机构地区：[1]泉州师范学院物理与信息工程学院,福建泉州362000

出　　处：《激光与光电子学进展》2015年第5期23-28,共6页Laser & Optoelectronics Progress

基　　金：福建省光传输与变换重点实验室开放课题(2014101)

摘　　要：研制了一种光纤微弯气压传感器,提出了一种利用梯形弹簧的压力非线性特性补偿光纤微弯传感器非线性的方法,并提出了利用差动检测克服光路损耗不稳定的方法。介绍了梯形弹簧光纤微弯传感器工作原理,对梯形弹簧变形量压力响应曲线进行非线性拟合,得到二次拟合曲线。实验测试了0～0.1 MPa范围的气压传感特性。结果表明,光纤气压传感器的输出电压信号与气压值具有良好的线性关系,得到气压测量灵敏度系数约为2000 m V/MPa,能够满足气象及飞行器高度监测中对气压测量的要求。A new fiber- optic pressure sensor is studied. A nonlinear compensation method for optical fiber micro bend sensor by using strain nonlinear characteristics of trapezoidal springs and a way to overcome the instability of optical path loss by using differential detection are proposed. The principles of the fiber microbend sensor with trapezoidal spring are introduced. Response curve of trapezoidal spring deformation at pressure of the aerodrome is nonlinear fitted, and the square curve is achieved. Atmospheric pressure from 0 to0.1 MPa is experimentally tested to verify sensing characteristics. Results show that output voltages and gas pressures have good linearity in the fiber- optic pressure sensors,and pressure measurement sensitivity coefficient is about 2000 m V/MPa. It can meet the requirements of pressure measurement in monitoring of meteorology and aircraft height.

关 键 词：光纤光学 气压传感器 光纤微弯传感器 非线性弹簧 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]