Tau kho qhov muagFiberStsuavSyu
Cov hluav taws xob fiber-optic pib ua haujlwm xyoo 1977 thiab txhim kho sai nrog kev txhim kho ntawm kev sib txuas lus kho qhov muag fiber ntau. Optical fiber sensing system yog qhov ntsuas tseem ceeb los ntsuas qhov ntsuas kev ntsuas xov hauv lub teb chaws. Los ntawm Hangzhou Internet ntawm Tej Yam thiab Hnov Cov Txheej Txheem Tshaj Tawm Daim Ntawv Thov Kev Tshawb Fawb, kev kho qhov muag fiber ntau tau siv dav hauv kev siv tub rog, tiv thaiv, huab cua, kev lag luam thiab tsuas tuam txhab, lub zog thiab kev tiv thaiv ib puag ncig, kev tswj hwm kev lag luam, kev kho mob thiab kev noj qab haus huv, ntsuas thiab kuaj, siv , cov cuab yeej siv hauv tsev thiab lwm cov teb. loj lag luam. Muaj ntau pua lub fiber-optic tso siab rau hauv lub ntiaj teb, xws li ntsuas kub, siab, ntws, hloov chaw, kev co, kev sib hloov, khoov, qib theem ua kua, nrawm nrawm, nrawm, suab teb, tam sim no, voltage, magnetic teb thiab hluav taws xob. Hnov.
Optical fiber ua hauj lwm zaus bandwidth, ntau qhov ntau qhov loj me, tsim nyog rau telemetry cov chaw taws teeb tswj, yog qhov zoo tshaj plaws poob qis kis; hauv qee qhov xwm txheej, cov kab ntsig kho qhov muag tau tshwj xeeb yooj yim rau kev lees txais qhov ntsuas lossis chaw thau khoom, yog ib qho kev tiv thaiv zoo; cov hluavtaws fiber nws tus kheej tsis tau them, me me, lub teeb yuag, yooj yim khoov, tiv thaiv hluav taws xob cuam tshuam, hluav taws xob tiv taus zoo, tshwj xeeb tshaj yog tsim rau siv nyob rau hauv qhov chaw ib puag ncig xws li kev kub nyhiab, tawg, qhov chaw tiv thaiv thiab muaj zog hluav taws xob cuam tshuam. Yog li no, fiber ntau kho qhov muag thev naus laus zis tau txais kev paub zoo txij li thaum nws pib, thiab tau tshawb nrhiav thiab siv nyob rau hauv yuav luag txhua thaj chaw, dhau los ua qhov kev tshaj lij ntawm cov thev naus laus zis ntawm kev siv technology thiab txhawb txoj kev loj hlob ntawm kev siv thev naus laus zis.
Optical fiber sensing, suav nrog kev nkag siab thiab kis ntawm cov ntsuas sab nraud (ntsuas). Lub npe sib piv (lossis kev nkag siab) yog hais txog tus yam ntxwv ntawm lub cev yam ntxwv ntawm lub teeb yoj kis tau los ntawm lub teeb liab sab nraud raws li nws txoj cai hloov pauv, xws li siv zog (lub zog), yoj ib ntus, zaus, theem thiab polarization xeev, thiab kev hloov pauv ntawm ntsuas ntsuas lub ntsuas hluav taws xob yog" Perceive" cov kev hloov pauv ntawm cov paib sab nraud. Qhov no" kev nkag siab" yog qhov tseem ceeb tshaj plaws lub teeb liab sab nraud uas hloov kho lub teeb yoj tawm hauv cov fiber ntau hauv lub sijhawm. Qhov hu ua sib kis txhais tau tias cov hluav taws xob optical xa cov nthwv dej kho qhov muag sab nraud los ntawm lub teeb liab sab nraud mus rau photodetector kom pom, rho tawm cov teeb liab sab nraud los ntawm cov nthwv dej kho qhov muag thiab ua cov ntaub ntawv kev ua raws li qhov xav tau, uas yog, demodulation. Yog li ntawd, fiber-optic sensing thev naus laus zis suav nrog ob qho tib si kev hloov kho thiab cov tswv yim qias neeg, uas yog, yuav ua li cas cov teeb liab sab nraud (ntsuas) hloov kho cov duab hluav taws xob tsis nyob hauv cov hluav taws xob optical (lossis txheej txheem kev thauj khoom) thiab yuav ua li cas rho tawm cov teeb liab sab nraud los ntawm lub teeb yoj ( Cov txheej txheem demodulation (lossis txheej txheem nrhiav kom tau) uas ntsuas).
Ib feem ntawm cov teeb liab sab nraud uas hloov kho qhov ntsuas tsis pom nyob rau hauv cov hluav taws xob tsoov hu ua qhov kev hloov kho cheeb tsam. Raws li kev sib raug zoo ntawm thaj chaw ntsuas thiab qhov kho qhov muag fiber ntau, qhov kev ntsuas tau muab faib ua ob pawg. Ib hom yog kev ua haujlwm hloov kho, thiab qhov ntsuas cheeb tsam yog nyob hauv qhov kho qhov muag. Lub teeb liab sab nraud hloov kho qhov nthwv dej kho qhov muag los ntawm kev hloov ncaj qha qee yam tshwj xeeb sib kis ntawm cov kab hluav taws xob. Xws li cov khoom siv hluav taws xob fiber ntau hu ua muaj hom kev ua haujlwm (Cov Txheej Txheem Fais Fab, FF hom rau luv luv) lossis intrinsic type fiber-optic sensor, thiab kuj dhau los ua qhov kev hloov kho hom sab hauv, thiab cov hluav taws xob kho qhov muag tau muaj cov haujlwm ntawm"" thiab" tso" ;. Cov txais fiber ntau txuas ntxiv rau lub teeb thiab txais cov hluav taws xob txuas ua ke rau photodetector yog cov xov tooj hluav taws xob txuas ntxiv hu ua cov khoom siv hluav taws xob, yog li cov cuab yeej ua haujlwm fiber ntau lub zog tseem hu ua fiber ntau lossis hnov lub fiber ntau lub zog. Lwm hom yog hom tsis ua haujlwm. Cov tes taws hauv cheeb tsam sab nraud yog qhov kho qhov muag. Lub teeb liab sab nraud yog hloov kho los ntawm sab nraud qhov ntsuas hloov mus rau lub nthwv dej kho qhov muag nkag mus hauv cov kab hluav taws xob. Qhov ntsuas cua fiber ntau no hu ua Non-Functional Fiber (NFF) lossis extrinsic. Qhov hom fiber-lub koob yees duab, xa cov fiber ntau thiab txais cov fiber ntau tsuas yog pab xa cov xov hluav taws xob, uas hu ua lub teeb xa xov, thiab tsis muaj txuas ntxiv. Yog li ntawd, qhov tsis ua haujlwm fiber ntau lub vev xaib tseem hu ua lub teeb xa hluav taws xob fiber ntau lossis lub zog tso rau sab nraud.
Raws li kev hloov pauv ntawm lub cev yam ntxwv ntawm lub teeb yoj lub teeb hloov mus los ntawm lub teeb liab sab nraud, kev hloov kho ntawm lub teeb ntoj hluav taws tuaj yeem muab faib ua tsib hom: lub teeb ci kev hloov kho, kev hloov pauv hloov kho qhov muag, kev siv hluav taws xob sib hloov, kho qhov muag theem hloov kho, thiab kho qhov sib txawv. tes taws los piav.
Txij li ib lub photodetector uas twb muaj lawm tsuas tuaj yeem teb tau rau qhov kev siv ntawm lub teeb, thiab tsis tuaj yeem teb ncaj qha rau qhov zaus, yoj lub cev, ntu, thiab qhov hloov kho qhov teeb liab ntawm lub teeb, nws yuav tsum tau hloov pauv mus rau qhov siv cov teeb meem los ntawm qee cov txheej txheem hloov dua siab tshiab. Txais thiab siv tshuaj xyuas.
Optical fiber sensing technology thov kev faib tawm
Lub teeb siv tes taws los piav
Lub teeb pom kev zoo yog qhov yooj yim thiab siv dav cov qauv hauv kev siv fiber ntau optic sensing technology. Lub hauv paus ntsiab lus yog siv cov kev tsis sib xws ntawm cov teeb liab sab nraud (ntsuas) los hloov qhov sib zog (piv txwv li kev hloov kho) ntawm lub teeb (dav dav hluav taws xob lossis lub teeb ntoj hluav taws xob tshwj xeeb) hauv cov fiber ntau, thiab tom qab ntawd ntsuas cov teeb meem tawm sab nrauv (demodulation) rau ua tiav lub teeb liab sab nraud. Kev Ntsuas.
Theem tes taws los piav
Optical phase modulation yog hais txog qhov hloov ntawm theem ntawm lub teeb nthwv tshaj tawm nyob rau hauv cov hluav taws xob kho qhov muag raws li qee txoj cai ntawm lub teeb liab sab nraud (ntsuas), thiab qhov nyiaj hloov pauv ntawm theem kho qhov muag pom tau hais tias ntsuas qhov ntsuas sab nraud.
Muaj feem ntau peb yam ntawm qib theem kho qhov muag siv nyob rau hauv fiber ntau optic sensing thev naus laus zis. Ib hom yog kev hloov kho qhov ua haujlwm, thiab cov teeb liab sab nraud hloov qhov ntsuas qhov ntsuas qhov loj thiab qhov ntsuas qhov ntsuas ntawm qhov pom ntawm cov hluav taws xob los ntawm cov quab yuam cuam tshuam, cov nyhuv ua kom muaj zog, cov nyhuv muaj teeb pom kev zoo thiab cov nyhuv thermo-optic ntawm optical fiber, yog li ua rau qhov hloov theem hauv qhov kho qhov muag fiber. Txhawm rau ua kom dhau tes taws los piav ntawm theem kho qhov muag. Hom ob yog Sagnac cuam tshuam kev hloov kho. Lub teeb liab sab nraud (kev sib hloov) tsis hloov pauv qhov ntsuas ntawm lub fiber nws tus kheej. Hloov chaw, cov roj carbon fiber nyob rau hauv inertial teb yog tig kom tsim qhov sib haum txoj kab sib txawv qhov sib txawv ntawm ob lub nqaj uas tau hais tawm nyob rau hauv kev rov qab. Cov qauv ntsuas ntawm cov theem kho qhov muag. Qhov thib peb hom yog cov kev ua haujlwm tsis hloov kho, uas yog, kev hloov kho ntawm theem kho qhov muag hauv qhov kho qhov muag ntawm qhov kho qhov muag los ntawm kev hloov kho qhov nthwv dej tsis sib xws mus rau qhov kho qhov muag fiber sab nraum qhov pom ntawm fiber ntau.
Polarization tes taws los piav
Polarization tes taws los piav txhais tau tias cov teeb liab sab nraud (ntsuas) ua rau muaj qhov tsis tu ncua (kho qhov muag tsis tu ncua) lossis birefringence ntawm lub dav hlau ntawm polarization ntawm lub teeb yoj hauv lub fiber hauv qee txoj kev, thiaj li ua rau muaj kev hloov pauv ntawm cov yam ntxwv ntawm lub teeb, los ntawm kuaj pom kev hloov pauv hauv lub xeev hom ci ci ntawm lub teeb. Nws tuaj yeem ntsuas tau hais tias lub ntiaj teb sab nraud yog ntsuas.
Wavelength kev hloov kho
Lub teeb liab sab nraud (ntsuas) hloov lub suab sib kis ntawm lub teeb xa mus rau hauv cov hluav taws xob kho qhov muag los ntawm kev siv ntau zaus xaiv, lim, thiab lwm yam, thiab ntsuas lub ntsuas yoj hloov tau tuaj yeem paub thiab ntsuas. Hom kev hloov kho hu ua hom kho qhov muag nowavelength tes taws los piav.
Cov kev tam sim no rau kev hloov kho wavelength feem ntau yog xaiv qhov ntau zaus kho qhov muag thiab lim. Pa hluav taws xob wavelength cov tes taws los piav txoj kev suav nrog cov qauv siv sab nrauv xws li FP interferometric lim, Riot polarization birefringent filtering, thiab ntau yam kev xaiv rau sab nrauv. Nyob rau hauv 20 xyoo dhau los, tshwj xeeb tshaj yog cov fiber grating filtering thev naus laus zis tsim sai heev nyob rau hauv xyoo tas los no tau qhib kev cia siab tshiab rau kev ua haujlwm optical wavelength kev hloov kho tshuab.
Ntau hom tes taws los piav
Optical zaus hloov kho txhais tau tias cov teeb liab sab nraud (ntsuas) ntsuas qhov zaus ntawm cov nthwv dej sib kis tau hauv cov hluav taws xob optical, thiab cov zaus tawm tsam cuam tshuam qhov ntsuas. Tam sim no, ntau txoj kev hloov kho nyob rau hauv txoj kev Doppler, uas yog, lub teeb liab sab nraud hloov kho qhov zaus ntawm cov nthwv dej kho qhov muag nyob rau hauv cov txais fiber ntau los ntawm Doppler effect, uas tsis yog kev hloov kho tsis ua haujlwm.
Cov yam ntxwv ntawm lub ntsuas pa:
High rhiab heev thiab tiv thaiv mus rau electromagnetic cuam tshuam. Vim tias lub tshuab hluav taws xob fiber nrhiav kom pom qhov nyuaj yog cuam tshuam los ntawm sab nraud, thiab lub teeb liab hluav taws xob tsis cuam tshuam nrog nthwv hluav taws xob thaum sib kis, thiab tsis cuam tshuam los ntawm lub suab nrov hluav taws xob. Vim muaj qhov tshwj xeeb no, lub zog fiber ntau tau txais hauv qhov pom ntawm lub zog. dav siv.
Cov fiber muaj qhov hloov tau yooj yim thiab tawv, yog li lub suab nrig tuaj yeem tsim ua cov duab sib txawv raws li cov kev xav tau ntawm kev kuaj xyuas thaj chaw.
Lub ntsuas zaus bandwidth thiab dynamic teb ntau yam yog loj.
Nws muaj lub peev xwm txav tau yooj yim thiab tuaj yeem ua rau lub zog ntawm qhov sib txawv hauv lub cev, suav nrog lub suab, thaj chaw sib nqus, siab, ntsuas kub, nrawm nrawm, tshem tawm, qib kua, ntws, tam sim no, hluav taws xob thiab lwm yam.
Nws yog qhov muaj peev xwm ua tau yooj yim thiab txuas nrog lub khoos phis tawj thiab fiber ntau, ua kom nws yooj yim los siv telemetry thiab tswj cov kab ke.
Application：
Optical Fiber Sensing Technology hauv Cov Hluav Taws Xob Kev Ntsuas Hluav Taws Xob
Optical Fiber Sensing Technology hauv Choj Nrhiav Kom Tau
Optical Fiber Sensing Technology hauv Geotechnical Mechanics thiab Engineering
Kev siv tub rog ntawm cov cuab yeej siv fiber ntau kho qhov muag