带温度补偿基于薄壁圆筒结构的光纤光栅压力传感器  

Optical Fiber Bragg Grating Pressure Sensor Based on Thin-Walled Cylinder Structure with Temperature Compensation

作　　者：王俊杰[1] 张丰涛[1] 刘波[1] 姜德生[1] 

机构地区：[1]武汉理工大学光纤传感与信息处理教育部重点实验室,武汉430070

出　　处：《纳米技术与精密工程》2009年第3期216-220,共5页Nanotechnology and Precision Engineering

基　　金：国家自然科学基金资助项目(50775169);国防科工委国防基础预研项目(C0620060418);武汉市青年科技晨光计划项目(20065004116-20)

摘　　要：阐述了一种带温度补偿、基于薄壁圆筒结构的高量程光纤光栅(FBG)压力传感器.薄壁圆筒直接作为弹性体,在压力作用下产生轴向位移来拉动压力敏感光纤以实现压力传感;通过被动温度补偿和残留温度效应主动实时修正来共同消除薄壁圆筒和压力敏感FBG的温度漂移;同时,对带温度补偿的FBG压力传感器的温度稳定性进行了讨论,给出了理想情况下该系统可达到的最优温度稳定性及决定因素.研究结果表明:基于30CrMiSiA材料管道结构的FBG压力传感器可以进行压力传感,其重复性为0.505 2%;回程误差为4.006%;线性度为0.285 5%;传感器精度为±2.639 8%;基于温度补偿进行温度去敏也有很好的效果,在-30～100℃范围内,该系统的温度稳定性因子为9.079 6%;随着实验温度范围减小至0～60℃,系统温度稳定性因子也减小至4.0%.A new style of fiber Bragg grating （FBG） pressure sensor based on a thin-walled cylinder structure with temperature compensation was described in this paper. The thin-walled cylinder, as an elastic element, converted fluid pressure into optical fiber strain directly. Passive temperature-compensating package and active correction for the residual temperature drift were adopted simultaneously to eliminate the thermal errors induced by the thin-walled cylinder and the sensing FBG. Besides, the temperature stability of the developed FBG pressure sensor with temperature compensation was discussed, through which the optimal temperature stability that the system could obtain and its determining factors were presented. Research results show that it is a feasible method to use the thin-walled cylinder made from 30CrMiSiA material to carry out pressure sensing. The repeatability, hysteresis, and nonlinearity of the sensor over the full pressure range are 0. 505 2% , 4. 006% and 0. 285 5% , respectively. Therefore, the overall measurement accuracy achieved is ± 2. 639 8% over the full range; and the temperature-compensated method also has a very good effect. Within the temperature range from -30 to 100℃, the temperature stability factor of this system is 9. 079 6% . With the test temperature minishing to the range of 0-60℃, the stability factor is reduced to 4%

关 键 词：光纤光栅 压力传感器 温度补偿 薄壁圆筒 温度稳定性 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]