温度/应变/扭曲三参量同时测量低成本传感系统  

Low Cost Sensing System for Simultaneous Measurements of Temperature, Strain and Torsion

作　　者：朱涛[1] 饶云江[2] 莫秋菊[1] 周昌学[1] 王久玲[1] 

机构地区：[1]重庆大学光电工程学院,重庆400030 [2]成都电子科技大学通信与信息工程学院,成都610015

出　　处：《光子学报》2006年第5期655-658,共4页Acta Photonica Sinica

基　　金：教育部重点基金(批准号:104210);重庆市自然科学重点基金(批准号:8415);国家自然科学基金重点项目(批准号:60537040)资助

摘　　要：提出了一种利用布喇格光纤光栅反射光作信号源、高频CO2激光脉冲写入的长周期光纤光栅和超周期光纤光栅作传感器实现温度、应变和扭曲同时测量的全光栅型低成本强度解调传感方案·文中利用长周期光纤光栅边缘滤波效应实现了温度、应变和扭曲传感信号的实时解调·实验结果表明,其温度和应变的测量灵敏度分别为-0.211dB/℃和-0.012dB/10με;而扭曲率的测量灵敏度为0.4394dB/(rad·m-1),是该法写入普通LPFG的4倍以上·A novel low cost sensing system for simultaneous measurements of temperature, strain and torsion based on unique optical characteristics of long period fiber gratings （LPFGs） and ultra-long period fiber gratings （ULPFGs） induced by high frequency CO, laser pulses was reported in this paper. Here an intensity-type demodulating approach which can satisfy the real measurement was realized based on the edge filtering effect of the LPFG and the ULPFG. The experimental results show that the sensitivities of temperature and strain are -0. 211 dB/℃ and -0. 012 dB/10με, respectively. And the sensitivity of torsion is 0. 4394 dB/（rad · m^-1 ）, which is 4 times over than that of normal LPFG.

关 键 词：传感器技术 光纤光栅 多参量测量 CO2激光 低成本 

分 类 号：TN253[电子电信—物理电子学]