Ob homogeneous conductors nrog sib txawv ntawm cov thermocouples yog thermoelectric electrodes

Ob homogeneous conductors nrog sib txawv ntawm cov thermocouples yog thermoelectric electrodes

Lub hauv paus ntsiab lus ntawm kev ntsuas kub yog tias ob yam khoom sib txawv ntawm cov khoom siv hluav taws xob (hu ua thermocouple xov hlau lossis thermoelectric electrodes) tsim ib lub voj voog kaw. Thaum qhov kub ntawm ob qhov kawg ntawm qhov sib txuas sib txawv thiab muaj qhov kub thiab txias, yuav muaj tam sim no dhau los ntawm Circuit Court. Lub sijhawm no, muaj lub zog hluav taws xob ntawm ob qhov kawg - thermoelectric electromotive quab yuam, uas yog hu ua Seebeck effect. Ob homogeneous conductors nrog cov sib txawv yog cov khoom siv hluav taws xob, nrog rau qhov kub siab kawg yog qhov kawg ua haujlwm (tseem hu ua qhov ntsuas qhov kawg) thiab qhov kub qis kawg yog qhov kawg dawb (tseem hu ua qhov nyiaj them kawg). Qhov kawg dawb yog feem ntau ntawm qhov kub thiab txias. Raws li kev sib raug zoo ntawm cov thermoelectric electromotive quab yuam thiab qhov kub thiab txias, tsim ib lub rooj thermocouple calibration; Lub rooj kawm tiav tau txais nyob rau hauv qhov xwm txheej ntawm qhov kub thiab txias ntawm 0 degree, thiab cov thermocouples sib txawv muaj cov rooj kawm tiav sib txawv.

Hluav taws xob cua sov hlau yog ib hom hluav taws xob tivthaiv uas tsim cov cua sov thaum siv hluav taws xob, siv los ua kom sov lwm yam khoom kom sov. Resistance, qhov tseeb, yog lub ntsiab lus ntawm resistor. Hais lus nruj me ntsis, qhov kev tiv thaiv tsis yog ib yam dab tsi, tab sis ib qho parameter uas piav txog qhov loj ntawm qhov tsis kam ntawm ib yam khoom rau tam sim no. Kev sib raug zoo lej yog qhov piv ntawm qhov hluav taws xob rau tam sim no ntawm tib lub cuab yeej hluav taws xob, lossis qhov hloov pauv hloov pauv: dV / dI. Txhua yam khoom muaj kev tiv thaiv, tshwj xeeb, kev tiv thaiv tuaj yeem yog xoom lossis kwv yees li xoom, thiab tshwj xeeb tshaj yog, kev tiv thaiv tuaj yeem ua tsis zoo! Thaum lub resistor dhau los ntawm qhov tam sim no, nws theoretically generates tshav kub, uas yog hu ua hluav taws xob cua sov hlau. Txawm li cas los xij, cov resistors hauv Circuit Court feem ntau tsis xav kom nws ua kom sov. Nyob rau hauv cov ntaub ntawv no, resistors nrog siab zog kam rau ua yog siv. Hauv cov hluav taws xob qis hluav taws xob, cov cua sov tsim los ntawm cov resistors yuav luag tsis pom zoo, xws li kev tsis sib haum xeeb ntawm transistors, voltage ntawm 5V, thiab tam sim no ntawm 20 μ A. Lub zog tsuas yog 0.1 milliwatts, thiab nws ntseeg tias txawm tias cov cuab yeej zoo tib yam tsis tuaj yeem ntsuas qhov kub thiab txias.

Thaum kawg, ua ib kab lus thiab muab ib qho piv txwv los qhia qhov txawv ntawm ob:

Kev ua haujlwm ntawm cov cua sov hlau A thaum lub sijhawm ua haujlwm ib txwm yog 96.8 Ω. Txuas nws mus rau 220V fais fab mov yuav ua rau lub zog ntawm 500W.

Qhov tam sim no dhau los ntawm resistor B tshaj qhov ntsuas tus nqi ntau dhau, ua rau kub thiab kub ntau dhau. Nws zoo li hluav taws xob cua sov xaim!

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