Thermocouples yog siv los ntsuas qhov kub ntawm qhov cub. Tus naj npawb indexing ntawm lub thermocouple feem ntau yog xaiv raws li qhov ntsuas kub ntawm lub hom phiaj. Tau kawg, nws tseem yuav tsum tau txiav txim siab seb qhov ntsuas cua puas txo qis lossis oxidizing; Yog tias siv armored thermocouples, tsis muaj kev xav ntau rau cov nyhuv ntawm redox cua ntawm thermocouples. Qhov cuam tshuam ntawm lub neej thiab ntsuas qhov tseeb.
Feem ntau cov cub tawg yuav tsum tau txuas nrog ntau tshaj ib lub thermocouple, tsawg kawg yog ib qho uas siv rau kev tswj qhov kub thiab txias thiab lwm yam rau kev kaw. Vim tias peb cov txheej txheem kev ua haujlwm yuav tsum tau ua raws, thaum ntsib lub qhov cub loj loj (qhov ntev ntawm ntau tshaj 5 meters), nws yuav tsum tau muab faib ua ob peb qhov kub thiab txias rau kev ntsuas thiab tswj, xws li sab sauv, nruab nrab thiab qis. Lub tshuab hluav taws xob nruj dua yuav tsum tau kuaj xyuas qhov ntsuas kub ntawm lub tshuab hluav taws xob tsis tu ncua. Ntawd yog, ntau lub thermocouples (lossis lwm yam sensors) tau sib npaug hauv thaj chaw ua haujlwm kom simulate cov txheej txheem siv ib txwm thiab thauj khoom los kuaj seb qhov kub ntawm lub tshuab hluav taws xob lub cev tsis zoo li lub sijhawm thiab lwm yam. Ntawd yog, seb qhov ntsuas qhov ntsuas kub ntawm qhov ntsuas kub ntawm qhov ntsuas kub ntawm lub thermocouple tuaj yeem sawv cev qhov tseeb ntawm qhov ntsuas kub ntawm qhov cub, thiab ntau tshaj ib qho kev ntsuas txhua tus nqi.
Cov ntawv thov tseem ceeb ntawm thermocouples yog ntsuas thiab ntsuas ntsuas. Ntxiv mus, lub thermocouple yog ib qho cuab yeej tseem ceeb, uas hloov qhov kub thiab txias rau hauv hluav taws xob muaj peev xwm, thiab qhov tsis muaj zog hluav taws xob muaj peev xwm raug xa mus rau qhov ntsuas thib ob rau kev ua, tso saib lossis luam ntawv. Qhov ntsuas thib ob tau muab faib ua hom analog thiab hom digital. Nws' yog qhov tseem ceeb ntawm txhua tus lej tam sim no.
Lub thermocouple txias hlws ris kub them nyiaj Circuit Court, Circuit Court muaj xws li ib tug voltage kub sensor TMP35 thiab ib tug K-hom thermocouple. Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub thermocouple yog nyob ntawm qhov kub ntawm qhov sib txawv ntawm qhov kub kawg thiab qhov txias kawg los ua kom muaj qhov sib txawv. Txij li thaum qhov kub ntawm qhov txias txias feem ntau tsis yog 0 ° C thaum ntsuas qhov tseeb, qhov kub thiab txias yuav tsum tau ua ntawm lub thermocouple. Thermocouple kub them nyiaj mis yog raws li nram no:
E(t,0)=E(t,t0)+E(t0,0)
Ntawm lawv, E (t0,0) yog qhov ntsuas hluav taws xob tiag tiag, t sawv cev rau qhov kub ntawm qhov kub kawg, t0 sawv cev rau qhov kub ntawm qhov txias txias, thiab 0 sawv cev rau 0 ° C. Hauv kev ntsuas qhov ntsuas kub, txij li qhov ntsuas kub ntawm qhov txias txias ntawm cov thermocouple feem ntau tsis yog 0 ° C, tab sis hloov pauv hauv qee qhov, qhov ntsuas qhov ntsuas kub yog E (t, t0). Yog tias koj xav ntsuas qhov ntsuas kub muaj peev xwm E(t,0) sib haum rau qhov ntsuas qhov ntsuas kub tiag tiag, koj yuav tsum them cov nyiaj them poob haujlwm E(t0,0) uas yuav tsum tau ua rau qhov txias txias tsis yog 0 ° C, thiab cov nyiaj them tuaj yeem sib txawv. nrog rau qhov kub thiab txias ntawm qhov sib txuas Cov yam ntxwv ntawm qhov kev hloov pauv yuav tsum ua raws li cov yam ntxwv ntawm cov thermocouple, kom cov txiaj ntsig zoo tshaj plaws tuaj yeem tau txais. Nws yog ib daim duab kos duab ntawm thermocouple txias hlws ris kub them nyiaj. Qhov ntsuas kub ntsuas TMP35 ua tiav qhov kub thiab txias ua haujlwm zoo. Qhov hluav taws xob tso zis los ntawm TMP35 yog thawj zaug muab faib los ntawm qhov tsis kam, thiab tom qab ntawd nthuav tawm los ntawm lub tshuab hluav taws xob, uas yog E (t0, O) sib raug rau K-hom thermocouple.
