单光纤光栅对温度与应变的同步测量.pdf

2112201012JournalofOptoelectronicsLaserVol.21No.12Dec.2010

单光纤光栅对温度与应变的同步测量*

1,2**221

倪凯,董新永,王剑锋,徐海松

(1.,310027;2.,

310018)

:(FBG)FBG

,,,2

FBG,,,2700

75!,6.11.0!,

FBG,

:(FBG);;;

:TN29:A:2010)

Strainandtemperaturesimultaneousmeasurementusingasingle

fiberBragggrating

1,2**221

NIKa,DONGXnyong,WANGJanfeng,XUHasong

(1.StateKeyLaboratoryofModernOptcalInstrumentaton,ZhejangUnversty,Hangzhou310027,Chna;2.In

sttuteofOptoelectroncTechnology,ChnaJlangUnversty,Hangzhou310018,Chna)

Abstract:Anewschemeforstranandtemperaturemeasurementsmultaneoussproposedusngasngle

fberBragggratng(FBG).TheFBGsdvdedntotwosectonswhchhaveanequallength,theepoxy

gluesdaubedononesecton,andtsnsertednsteelcannula.Sothetwosectonscanberegardedas

twoFBGswthdfferentBraggwavelengths.UsngthedfferencesoftherYoung∀smodulandcoeff

centsofthermalexpanson,bothstranandtemperaturecanbemeasured.nthemeasurementregonsof

2700and75!,stranresolutonandtemperatureresolutonof~6.1and~1.0!areacheved.

Theseerrorsaremanlyduetothelmtedresolutonoftheoptcalspectrumanalyzerandthethckness

oftheepoxygluebetween