Kev Taw Qhia:

Hauv cov txheej txheem tsim khoom lag luam, qhov kub thiab txias yog ib qho tseem ceeb uas yuav tsum tau ntsuas thiab tswj. Hauv kev ntsuas qhov kub thiab txias, cov thermocouples siv dav. Lawv muaj ntau yam zoo, xws li cov qauv yooj yim, yooj yim tsim khoom, ntau yam ntsuas, qhov tseeb siab, me me inertia, thiab yooj yim xa cov teeb liab tawm mus rau lwm qhov. Tsis tas li ntawd, vim tias cov thermocouple yog lub sensor passive, nws tsis xav tau lub zog sab nraud thaum ntsuas, thiab nws yooj yim heev rau siv, yog li nws feem ntau siv los ntsuas qhov kub ntawm roj lossis kua hauv cov cub tawg thiab cov kav dej thiab qhov kub ntawm cov khoom khov.

Txoj Cai Ua Haujlwm:

Thaum muaj ob lub conductors sib txawv lossis semiconductors A thiab B los ua ib lub voj voog, thiab ob qhov kawg txuas nrog ib leeg, tsuav yog qhov kub ntawm ob qhov sib txuas sib txawv, qhov kub ntawm ib kawg yog T, uas hu ua qhov kawg ua haujlwm lossis qhov kawg kub, thiab qhov kub ntawm lwm qhov kawg yog T0, hu ua qhov kawg dawb (tseem hu ua qhov kawg siv) lossis qhov kawg txias, lub zog electromotive yuav tsim nyob rau hauv lub voj voog, thiab qhov kev taw qhia thiab qhov loj ntawm lub zog electromotive muaj feem cuam tshuam nrog cov khoom siv ntawm tus conductor thiab qhov kub ntawm ob qhov sib txuas. Qhov xwm txheej no hu ua "thermoelectric effect", thiab lub voj voog uas muaj ob tus conductors hu ua "thermocouple".

Lub zog thermoelectromotive muaj ob ntu, ib ntu yog lub zog electromotive sib cuag ntawm ob tus neeg hlau, thiab lwm ntu yog lub zog thermoelectric electromotive ntawm ib tus neeg hlau.

Qhov loj ntawm lub zog thermoelectromotive hauv lub voj thermocouple tsuas yog cuam tshuam nrog cov khoom siv conductor uas tsim cov thermocouple thiab qhov kub ntawm ob qhov sib txuas, thiab tsis muaj dab tsi ua rau cov duab thiab qhov loj ntawm thermocouple. Thaum ob lub khoom siv electrode ntawm thermocouple raug kho, lub zog thermoelectromotive yog ob qhov kub sib txuas t thiab t0. kev ua haujlwm tsis zoo.