Taw qhia:

Hauv cov txheej txheem tsim khoom, qhov kub thiab txias yog ib qho tseem ceeb uas yuav tsum tau ntsuas thiab tswj. Hauv kev ntsuas kub, thermocouples tau dav siv. Lawv muaj ntau yam zoo, xws li cov qauv yooj yim, siv tau yooj yim, kev ntsuas dav dav, siab precision, me inertia, thiab yooj yim tej thaj chaw deb kis tau tus mob ntawm cov zis teeb liab. Tsis tas li ntawd, vim hais tias lub thermocouple yog ib tug passive sensor, nws tsis xav tau ib tug sab nraud fais fab mov thaum lub sij hawm ntsuas, thiab nws yog heev yooj yim mus siv, yog li nws yog feem ntau siv los ntsuas qhov kub thiab txias ntawm cov pa roj los yog kua nyob rau hauv lub cub tawg thiab cov kav dej thiab qhov chaw. kub ntawm cov khoom.

Txoj Cai Ua Haujlwm:

Thaum muaj ob qhov sib txawv conductors lossis semiconductors A thiab B los ua ib lub voj, thiab ob qhov kawg txuas rau ib leeg, tsuav yog qhov kub ntawm ob qhov sib txuas sib txawv, qhov kub ntawm ib kawg yog T, uas yog hu ua tus ua hauj lwm kawg los yog kub kawg, thiab qhov kub ntawm qhov kawg yog T0, hu ua dawb kawg (tseem hu ua qhov kawg siv) los yog txias kawg, ib tug electromotive quab yuam yuav generated nyob rau hauv lub voj, thiab cov kev taw qhia thiab qhov loj ntawm lub electromotive quab yuam muaj feem xyuam rau cov khoom ntawm tus neeg xyuas pib thiab qhov kub ntawm ob qhov sib txuas. Qhov tshwm sim no hu ua "thermoelectric effect", thiab lub voj uas muaj ob lub conductors hu ua "thermocouple".

Lub thermoelectromotive quab yuam muaj ob feem, ib feem yog kev sib cuag electromotive quab yuam ntawm ob conductors, thiab lwm qhov yog lub thermoelectric electromotive quab yuam ntawm ib tug neeg xyuas pib.

Qhov loj ntawm lub thermoelectromotive quab yuam nyob rau hauv lub voj voog thermocouple tsuas yog cuam tshuam nrog cov khoom siv hluav taws xob uas tsim cov thermocouple thiab qhov kub ntawm ob qhov sib txuas, thiab tsis muaj dab tsi cuam tshuam nrog cov duab thiab qhov loj ntawm lub thermocouple. Thaum ob qho khoom siv hluav taws xob ntawm cov thermocouple raug kho, lub zog thermoelectromotive yog ob qhov kub thiab txias t thiab t0. kev ua haujlwm tsis zoo.