Pakakhala ma conductors awiri osiyana kapena semiconductor A ndi B kuti apange loop A, mapeto ake onse amalumikizana, malinga ngati kutentha kwa mfundo ziwirizo kuli kosiyana, kutentha kwa T, komwe kumatchedwa mapeto kapena ntchito yotentha, kumbali inayo. kutentha kumapeto kwa T0, komwe kumadziwikanso kuti kutha kwaufulu (komwe kumatchedwanso mbali yofotokozera) kapena kuzizira kozizira, dera lidzapanga mphamvu yamagetsi, mayendedwe ndi kukula kwa mphamvu ya electromotive ikugwirizana ndi zinthu zochititsa chidwi komanso kutentha kwa awiriwa. .Chodabwitsa ichi chimatchedwa thermoelectric effect, mitundu iwiri ya conductor circuit yotchedwa "thermocouple", yopangidwa ndi ma conductors awiri omwe amatchedwa "hot" electrode, mphamvu ya electromotive imatchedwa "thermoelectric emfs".
Thermoelectric emfs amapangidwa ndi magawo awiri a electromotive mphamvu, gawo 2 kondakitala kukhudzana electromotive mphamvu, mbali ina ndi kondakitala mmodzi wa kutentha kusiyana electromotive mphamvu.
Kukula kwa thermocouple loop thermoelectric emfs, kokha ndi mapangidwe a zida zopangira thermocouple zokhudzana ndi kutentha kwa kukhudzana kuwiri, ndipo alibe chochita ndi kukula kwa mawonekedwe a thermocouple.Pambuyo pa thermocouple yokonza zida ziwiri zama elekitirodi, kutentha kwa t ndi ma emfs a thermoelectric ndi ma t0 awiri.Ntchitoyi ndi yoyipa.
Equation iyi yagwiritsidwa ntchito kwambiri pakuyezera kutentha kwenikweni.Chifukwa cha kuzizira kwa t0 kosalekeza, kopangidwa ndi thermocouple thermoelectric emfs kokha (kuyezera) kutentha kwa kutentha kumasiyanasiyana, emfs ya thermoelectric imagwirizana ndi kutentha kwina.Malingana ngati timagwiritsa ntchito njira yoyezera ma emfs a thermoelectric akhoza kukwaniritsa cholinga cha kuyeza kutentha.
Kuyeza kwa kutentha kwa thermocouple ndiye mfundo yofunikira yamitundu iwiri yazinthu zosiyanasiyana zopangira zida zotsekera zotsekera, pomwe kutentha kwanyengo kuli kumapeto onse awiri, kuzungulira kumakhala ndi magetsi odutsa, omwe analipo pakati pa mphamvu yama electromotive mbali zonse ziwiri - thermoelectric emf. , izi ndizo zomwe zimatchedwa Seebeck effect (Seebeck effect).Awiri osiyana zigawo zikuluzikulu za homogeneous kondakitala elekitirodi monga kutentha, kutentha ndi apamwamba ntchito kumapeto kwa mapeto a mapeto a kutentha otsika monga ufulu mapeto, kawirikawiri ufulu mapeto pansi nthawi zonse kutentha.Malinga ndi thermoelectric emf monga ntchito ya kutentha, thermocouple indexing tebulo;Gome la indexing ndi kutentha kwaulele kwa 0 ℃, pansi pa ma thermocouples osiyanasiyana okhala ndi tebulo lolozera.
Kufikira mu thermocouple kuzungulira pamene lachitatu zitsulo zakuthupi, kulankhula awiri pa kutentha yemweyo malingana ndi zinthu, opangidwa ndi thermocouple thermoelectric wakhazikitsidwa kukhala yemweyo, amene sakhudzidwa ndi lachitatu zitsulo kupeza mu kuzungulira.Choncho, pamene muyeso wa kutentha kwa thermocouple, ukhoza kugwirizanitsidwa ndi chida choyezera, choyesedwa pambuyo pa emfs ya thermoelectric, akhoza kudziwa kutentha kwa sing'anga yoyezera.Thermocouple kuyeza kutentha kwa mapeto ozizira (kuyezera mapeto kwa yotentha mapeto, ndi mapeto a kutsogolera olumikizidwa kwa dera muyeso amatchedwa ozizira mphambano) kutentha amasungidwa mosalekeza, kukula kwa mphamvu thermoelectric ndi kutentha kuyeza mu ubale wina gawo.Poyezera, kutentha kwakumapeto kozizira kumasintha (chilengedwe), kudzakhudza kwambiri kulondola kwa kuyeza.Kuchitapo kanthu pa kuzizira mapeto chipukuta misozi chifukwa cha zotsatira za kuzizira mapeto kusintha kwa kutentha amatchedwa thermocouple ozizira mphambano chipukuta misozi ndi yachibadwa.Kulumikizidwa ku chida choyezera ndi wowongolera wapadera wamalipiro.
Njira yowerengera chipukuta misozi ya Thermocouple:
Kuchokera ku millivolt kupita ku kutentha: kuyeza kutentha kwa mapeto ozizira ndi kutembenuka kwa ma millivolt ofanana, ma millivolt ndi thermocouple, kutembenuka kwa kutentha;
Kuchokera ku kutentha kupita ku millivolt: kuyeza kutentha kwenikweni ndi kutentha kwa mapeto ozizira ndi kutembenuka kwa ma millivolt, motero, mutachotsa millivolt, kutentha kwachangu.
Nthawi yotumiza: Dec-04-2020