西北大学硕士学位论文双参量同时区分测量光纤光栅传感的研究姓名:兆雪申请学位级别:硕士专业:光学指导教师:白晋涛20090615西北大学硕士学位论文摘要光纤布拉格光栅(FBG)是一种国际上新兴的,应用于光纤通讯、光纤传感等光电子处理领域,并有着广泛应用前景的基础性光纤器件。当前FBG的制作与应用研究成为世界各国光纤技术研究的热点和重点。布喇格光纤光栅传感器是利用Bragg波长对温度、应变的敏感特性制成的一种新型光纤传感器,它具有抗电磁干扰、精度高、长期稳定性好、能多点分布检测等优点,在大型复合材料和混凝土的结构监测、智能材料的性能监测、电力工业、医药和化工等领域有着广阔的应用前景。本文针对光纤光栅传感器的温度和应变的交叉敏感这一关键问题进行了分析讨论并给出自己的设计方案。首??,总结了光纤光栅温度应变同时区分测量技术的国内外发展现状以及其关键技术和难点。其次,对于光纤光栅温度传感、应变传感的传感原理和传感方法做了总结。然后,叙述了光纤光栅传感器双参量的传感原理,归纳了现有的光纤光栅传感器双参量同时区分测量方法,并且对其优缺点进行了分析总结。最后,提出了一种基于悬臂梁结合的光纤光栅温度应变同时区分测量的设计方案。通过在悬臂梁侧面粘贴一个光纤布拉格光栅(FBG),根据光纤光栅对在应力作用下产生大小相等、方向相反的布拉格波长漂移量,运用理论分析来实现温度、应变的同时区分测量。关键词光纤Bragg光栅,区分测量,交叉敏感摘要AbstractTheFiberBraggGrating(FBG)isanewfiber-opticaldevice,andiswidespreadusedinfiber-opticcommunications,fibersensing,andSOon.Atpresent,thefabricationandapplicationofFBGisthefocusandpriorityoffiber-opticaltechnologystudiesintheworld.FiberBraggGrating(FBG)sensorwhichusesthepropertythattheBraggwavelengthissensitivetotemperatureandstrain,isanewkindoffiberopticsensor.Inadditiontohavingthesa???efunctionsasthetraditionalelectricsensors,theFBGsensoralsohassomespecialcharactersficssuchasdistributedsensing,immunetoelectromagneticinterference,m曲precisionandlong-termstability.Soithaswidelyapplicableperspectiveinmanyfieldssuchasthestructuremonitoringoflargecompoundmaterialandconcrete,theperformancemonitoringoftheintelligentmate???ials,electricalpowerindustrymedicineindustrychemicalengineeringetc.Thispaperfocusesoncross-sensitivityeffectbetweentemperatureandstrainofopticalfibergratingandthedesignprogramisgiven.Firstlytherecentdevelopmentsinthefibergratingsensingareaoftemperatureandstrainsimultaneousmeasurement,key'technologyandtheproblemsconcerningopticalfibergratingsensingtechnologyareanalyzed.Secondlythesensingprincipleoftemperatureandstrainofopticalfibergratingaswellasthesensingprojectsaresummarized.Thirdlythesensingprincipleofbothparametersischaracterized.Theexistingprojectsfortemperatureandstrainsimultaneousmeasurementaswellastheirbenefitsandshortcomingsaresumma