Cov kev txwv sab saud thiab qis ntawm qhov chaw ua haujlwm kub ntawm qhov ntsuas kub ntawm fluorescent optical fiber ntau yog -20 ℃ ~ +55 ℃. Qhov ntsuas qhov ntsuas ntawm qhov ntsuas kub ntawm qhov ntsuas qhov ntsuas qhov ntsuas yog -40 ℃ ~ 200.0 ℃. Tsis tas li ntawd, qhov kub thiab txias sensor tuaj yeem hloov kho. Ordinary pa kub resistant optical fiber yog -20 ° ~ +300 ° mus sij hawm ntev, thiab nws muaj peev xwm ncav cuag 350 ° nyob rau hauv lub sij hawm luv luv. Qhov chaw ua haujlwm kub ntawm qhov ntsuas kub ntawm qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas kub yog -10 ℃ ~ 50 ℃, qhov ntsuas kub ib txwm yog -40-120 ℃, thiab qhov kub kub kho qhov muag cable yog -40-400 ℃. Kev ntsuas kub ntau ntawm fiber ntau grating kub sensor yog -40 ℃ ~ 300 ℃.
Fiber ntau cuam tshuam los ntawm qhov kub thiab txias
Cov yam ntxwv ntawm qhov kub thiab txias ntawm ib qho khoom siv fiber ntau yog hais txog qhov cuam tshuam ntawm qhov poob ntawm qhov muag fiber ntau nyob rau hauv qhov kub thiab txias. Kev poob ntawm cov fiber ntau optical nce nyob rau hauv qhov kub thiab txias. Qhov no yog vim qhov sib txawv expansion coefficients ntawm optical fiber txheej txheej, overmolding txheej thiab quartz. Lub thermal expansion coefficient ntawm cov organic resins thiab cov yas yog loj dua li ntawm quartz. Nyob rau hauv qhov kev txiav txim ntawm hom axial compressive quab yuam, microbending yuav ua rau kom poob. Yog tias ua haujlwm ntawm qhov kub qis, raws li qhov kub thiab txias txuas ntxiv mus, qhov poob ntawm fiber ntau yuav nce ntxiv. Thaum qhov kub poob mus txog -55 ° C, qhov poob yuav nce siab, ua rau lub cev tsis tuaj yeem ua haujlwm li qub.
Lub microbending poob ntawm cov fiber ntau optical vim qhov kub hloov pauv yog tshwm sim los ntawm thermal expansion thiab contraction. Nws yog paub nyob rau hauv physics hais tias lub thermal expansion coefficient ntawm silicon dioxide (SiO2) uas yog cov optical fiber ntau me me, thiab nws tsis tshua muaj shrinks thaum kub poob. Cov fiber ntau kho qhov muag yuav tsum tau coated thiab ntxiv nrog rau lwm cov khoom hauv cov txheej txheem ntawm kev tsim ib lub cable. Kev nthuav dav coefficient ntawm cov khoom siv txheej thiab lwm yam yog qhov loj. Thaum qhov kub thiab txias, qhov shrinkage yog qhov hnyav dua, yog li thaum kub hloov pauv, qhov nthuav dav coefficient ntawm cov khoom sib txawv. , Yuav ua rau qhov kho qhov muag fiber ntau khoov me ntsis, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias.
