Yuav txiav txim li cas seb puas kub khiav Thermocouple Alloy hlau yog laus

Kev laus ntawm cov hlau hlau yog ib qho irreversible natural degrading txheej txheem ntawm kub khiav thermocouples nyob rau hauv lub sij hawm ntev kub load, uas yuav ua rau lub phenomenon ntawm kub drift, ncua teeb liab teb thiab tsis ruaj tsis khov nyeem ntawv. Cov neeg ua haujlwm saib xyuas feem ntau tsis xav txog cov tsos mob ntawm kev laus thaum ntxov uas tsim cov khoom lag luam tsis zoo, thiab hloov cov sensors tsuas yog tom qab qhib -circuit lossis luv-circuit tswb. Cov ntsiab lus ntawm ntau- qhov kev txiav txim me me txhais tau hais tias xws li kev soj ntsuam zoo li, ntsuas ntsuas ntsuas, ntsuas qhov ntsuas kub thiab ntsuas kev ua haujlwm nkhaus tuaj yeem paub qhov kev txheeb xyuas thaum ntxov ntawm cov thermocouples kev laus thiab kev hloov pauv ntawm cov laus thermocouples ua ntej qhov tsis zoo tshwm sim.

Kev tshuaj xyuas qhov muag pom pom pom cov cim thaum ntxov ntawm lub hnub nyoog yam tsis tas yuav tsum tau muab tshem tawm. Cov txheej txheej txheej ntawm cov thermocouple aging qhia cov xim dub oxidation discoloration thaum lub sij hawm ntev - lub sij hawm siab - kub, thiab kev laus hnyav ua rau tsim cov xeb tuab thiab pitting pits ntawm cov hlau nto. Lub tes tsho tiv thaiv fiberglass uas tawm tuaj yog nkig, zoo li tawg thiab flakes hmoov thaum nws maj mam muab tais. Lub davhlau ya nyob twg ntsaws pins yog them nrog tuab ntsuab oxide xeb uas tsis tuaj yeem ntxuav tag nrho nrog daim ntaub huv. Rau lub taub hau sensor, me me nkig oxide coatings yog tsim nyob rau hauv vuam hlaws ntawm cov laus hlau hlau uas delaminate thaum tuav maj mam exposing frail sab hauv hlau hlau. Yog hais tias ib qho ntawm cov teeb meem hauv qab no tam sim no, cov hlau hlau tsis muaj nyob hauv tau pib crystallize thiab cov thermocouple tsis tuaj yeem rov qab los rau nws qhov tseeb qub, txawm tias nws raug ntxuav thiab ntsuas.

Multimeter static resistance testing qhia qhov℃ntawm hlau aging hauv. Siv high precision digital multimeter los ntsuas tag nrho lub voj tsis kam ntawm cov thermocouple zoo thiab qhov tsis zoo ntawm cov xov hlau, thiab muab piv nrog cov qauv kev tiv thaiv tus nqi ntawm cov qauv tshiab sensors nrog tib qhov ntev. Kev laus hlau hlau tsim cov hlau oxide me me hauv cov ntaub qhwv uas ua rau kom tag nrho lub voj tsis kam. Yog tias qhov ntsuas tsis kam ntsuas ntau dua 15% siab dua tus qauv tus nqi, cov hlau alloy yog qhov tseeb tias muaj hnub nyoog thiab yuav ua rau muaj teeb meem loj hauv kev ua haujlwm. Nyob rau hauv lub meantime sim hloov lub multimeter mus rau rwb thaiv tsev hom . Kev laus cov thermocouples nrog puas magnesium oxide rwb thaiv tsev yuav qhia txog rwb thaiv tsev tiv thaiv qis dua 500MΩ, qhia zais luv luv - Circuit Court txaus ntshai . Qhov kev sim no yooj yim, ua tau zoo thiab tsim nyog rau kev sim batch ntawm cov khoom seem thermocouples tuav hauv cov khoom muag.

Txoj kev ntsuas kev laus tshaj plaws yog qhov ntsuas kub ntawm qhov ntsuas kub. Qhov ntsuas kub ntsuas tau ua tiav ntawm 200 degree, 350℃thiab 400℃los ntawm peb- taw tes nrog qhov kub thiab txias qhov cub tawg, ceeb toom qhov sib txawv ntawm qhov ntsuas kub ntsuas thiab ntsuas ntsuas tus qauv. Tshiab tsim nyog K-hom thermocouples muaj qhov sib txawv hauv ± 0.8 degree, thiab nrog kev laus loj, qhov yuam kev tsis sib xws yog mus txog ± 2℃lossis ntau dua, thiab tus nqi sib txawv pom tau nce ntxiv tom qab 72- teev siab -kub kev laus simulation simulation. Kev tiv thaiv - drift muaj peev xwm ntawm kev laus hlau hlau ntawm N- hom kub kub thermocouples ploj lawm thiab qhov kev ua yuam kev hloov pauv tsis ruaj khov ntawm qhov kub siab tshaj plaws ntawm 420℃. Calibration cov ntaub ntawv nrog kev sib txawv loj qhia qhov tseeb tias cov hlau alloy hlau siv lead ua tau dhau los hloov pauv tsis tau, thiab cov thermocouples yuav tsum tau muab pov tseg ncaj qha thiab tsis siv txuas ntxiv tom qab kev kho qhov kev kho.

Dynamic kub nkhaus yog txheeb xyuas los txiav txim siab lub sijhawm laus thaum lub sijhawm tsim khoom. Saib ntawm qhov ntsuas kub hloov pauv ntawm qhov kub khiav tswj qhov ntsuas qhov ntsuas qhov ntsuas thaum lub sijhawm cua sov thiab kev txuag hluav taws xob. Cov thermocouples tshiab uas tsis muaj kev puas tsuaj tuaj yeem ua rau qhov nkhaus nkhaus tsis muaj qhov txawv txav; Kev laus cov sensors pom qhov kub thiab txias nce qeeb thaum lub sij hawm cua sov, thiab qhov me me random dhia thaum tuav qhov kub thiab txias. Cov laus thermocouples nkhaus yuav siv sij hawm ntau tshaj 5 vib nas this los teb thaum lub cua sov lub hwj chim setpoint hloov, uas yog cov yam ntxwv ntawm oxidized hlau hlau tsis muaj zog thermoelectric teeb liab. Nyob rau hauv cov ntaub ntawv ntawm tas li kub hnyiab los yog ib nrab filling teeb meem nyob rau hauv ob peb batch ntawm yas qhov chaw thiab qeeb kub teb nkhaus, lub hauv paus ntsiab lus yog lub aging ntawm thermocouple alloy hlau.

Cov hnub nyoog thermocouples pov tseg cov kev daws teeb meem raug cais raws li qhov xav tau kom tsis txhob muaj kev pheej hmoo ntau lawm. Kev laus me ntsis nrog kev sib txawv ntawm qhov sib txawv hauv 1℃yog muaj rau qis - ntim cov khoom ua si pwm thiab cov khoom ua si pwm ib ntus tom qab tus maub los offset calibration nrog luv luv xyuas lub voj voog rau txhua ob lub lis piam. Automotive thiab kev kho mob precision pwm tsis raug tso cai siv cov thermocouples nrog qhov sib txawv ntawm ntau tshaj 1.5 degree, nce lub voj tsis kam lossis lub tsho sab nrauv, thiab yuav tsum tau hloov tam sim ntawd. Kev tshawb pom kev laus tsis tu ncua txhua hli rau cov kab ntau lawm tsis tu ncua tuaj yeem tshem tawm cov kev phom sij tsis zoo uas tshwm sim los ntawm cov hlau hlau puas.