基于光纤光栅的高精度测温传感器研究
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摘要
利用光纤光栅对温度和应变同时敏感的特性,我们设计制作了一款满足地震前兆观测中地温观测精度要求的双金属光纤光栅温度传感器,并首次对温度增敏后的光纤光栅传感器样品进行了精度分析,得到该传感器的精度达到±0.05℃,获得了现今光纤光栅温度传感器最高的分辨率0.0014℃/pm.该传感器的成功研制从实验上证明了光纤光栅用于地震前兆观测的可行性,为地震前兆观测的光学化打下了坚实的基础.
Basing on the character that Fiber Bragg Grating(FBG) is sensitive to both temperature and strain,by using Al and Fe-Ni alloy′s bimetal structure,we successfully design and manufacture a high accuracy FBG temperature sensor for earthquake premonition.Furthermore,we analyze the accuracy of the FBG sensors with enhanced sensitivity for the first time,and get its accuracy is up to ±0.05℃ with highest resolution ever in all FBG temperature sensors(0.0014℃/pm).This work experimentally proves the feasibility of using FBG in the earthquake premonition monitoring,and builds the foundation for the application of optic technology in earthquake premonition monitoring.
Basing on the character that Fiber Bragg Grating(FBG) is sensitive to both temperature and strain,by using Al and Fe-Ni alloy′s bimetal structure,we successfully design and manufacture a high accuracy FBG temperature sensor for earthquake premonition.Furthermore,we analyze the accuracy of the FBG sensors with enhanced sensitivity for the first time,and get its accuracy is up to ±0.05℃ with highest resolution ever in all FBG temperature sensors(0.0014℃/pm).This work experimentally proves the feasibility of using FBG in the earthquake premonition monitoring,and builds the foundation for the application of optic technology in earthquake premonition monitoring.
引文
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[2]左建平,谢和平,周宏伟,彭苏萍.不同温度作用下砂岩热开裂的实验研究[J].地球物理学报,2007,50(4):1150~1155.Zuo J P,Xie H P,Zhou H W,Peng S P.Experimental re-search on thermal cracking of sandstone under different temperature[J].Chinese J.Geophys.(in Chinese),2007,50(4):1150~1155.
[3]魏荣强,臧绍先.岩石破裂强度的温度和应变率效应及其对岩石圈流变结构的影响[J].地球物理学报,2006,49(6):1730~1737.Wei R Q,Zang S X.Effects of temperature and strain rate onthe fracture strength of rock and their influences on the rheo-logical structure of the lithosphere[J].Chinese J.Geophys.(in Chinese),2006,49(6):1730~1737.
[4]江灏,程国栋,王可丽.青藏高原地表温度的比较分析[J].地球物理学报,2006,49(2):391~397.Jiang H,Cheng G D,Wang K L.Analyzing and measuringthe surface temperature of Qinghai-Tibet Plateau[J].ChineseJ.Geophys.(in Chinese),2006,49(2):391~397
[5]陈晓冬,金旭,管彦武等长春地区地表温度日变、年变对地温测量的影响[J].地球物理学进展,2006,21(3):1008~1011.Chen X D,Jin X,Guan Y W,et al.The influence of daily andannual variation of the surface temperature on near-surfacetemperature survey[J].Progress in Geophysics(in Chinese),2006,21(3):1008~1011.
[6]杨冬红,杨学祥,刘财.2004年12月26日印尼地震海啸与全球低温[J].地球物理学进展,2006,21(3):1023~1027.Yang D H,Yang X X,Liu C.Global low temperature,earth-quake and tsunami(Dec.26,2004)in Indonesia[J].Progressin Geophysics(in Chinese),2006,21(3):1023~1027.
[7]Meltz G,Morey W W,Glenn W H.Formation of Bragg grat-ings in optical fibers by a transverse holographic method[J].Opt.Lett.1989,14:823~825.
[8]Cruz J L,Dong L,Reekie L.Improved thermal sensitivity offibre Bragg gratings using a polymer overlayer[J].ElectronicsLetters,1996,32:385~387.
[9]Jung J,Nam H,Lee B,et al.Fiber Bragg grating temperaturesensor with controllable sensitivity[J].Applied optics,1999,38:2752~2755.
[10]周振安,刘爱英.光纤光栅传感器用于高精度应变测量研究[J].地球物理学进展,2005,20(3):864~866.Zhou Z A,Liu A Y.The application of Fiber Bragg Gratingsensor to high precision strain measure[J].Progress in Geo-physics(in Chinese),2005,20(3):864~866.
[11]成大先主编.机械手册[M].北京:化学化工出版社,(1):1~11.Chen D X.Mechanism handbooks[M].Beijing:Chemistry&Chemical-Industry Press,(1):1~11.
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