Ha ho na le li-conductor tse peli tse fapaneng kapa semiconductor A le B ho etsa loop, lipheletsong tsa eona ka bobeli li hokahane, ha feela mocheso oa li-node tse peli o fapane, mocheso oa ho qetela oa T, o bitsoang qetello kapa mosebetsi o chesang oa ho qetela, ka lehlakoreng le leng. pheletso ea mocheso T0, e tsejoang e le pheletso ea mahala (eo hape e tsejoang e le lehlakore la litšupiso) kapa pheletso e batang, potoloho e tla hlahisa matla a motlakase, tataiso le boholo ba matla a motlakase a amanang le thepa ea mokhanni le mocheso oa ho kopana ha bobeli. .Ketsahalo ena e bitsoa phello ea thermoelectric, mefuta e 'meli ea potoloho ea conductor e tsejoang e le "thermocouple", e entsoeng ka li-conductor tse peli tse bitsoang "hot" electrode, matla a electromotive a bitsoa "thermoelectric emfs".
Thermoelectric emfs e entsoe ka likarolo tse peli tsa matla a electromotive, karolo ea bobeli ea conductor contact electromotive force, karolo e 'ngoe ke conductor e le' ngoe ea mocheso o fapaneng oa matla a electromotive.
Boholo ba thermocouple loop thermoelectric emfs, feela ka ho hlophisoa ha lisebelisoa tsa mokhanni oa thermocouple tse amanang le mocheso oa ho kopana ka bobeli, 'me ha ho letho le amanang le boholo ba sebopeho sa thermocouple.Ka mor'a hore thermocouple e be le lisebelisoa tse peli tsa electrode, mocheso oa ho kopana t le thermoelectric emfs ke tse peli t0.Mosebetsi o fokola.
Equation ena e sebelisitsoe haholo tekanyong ea 'nete ea mocheso.Ka lebaka la mocheso o batang oa t0 kamehla, o hlahisoang ke thermocouple thermoelectric emfs feela (tekanyo) ea mocheso oa mocheso o chesang o fapana, li-emfs tsa thermoelectric li lumellana le mocheso o itseng.Hafeela re sebelisa mokhoa oa ho lekanya li-emfs tsa thermoelectric li ka finyella sepheo sa tekanyo ea mocheso.
Tekanyo ea mocheso oa Thermocouple ke molao-motheo oa mantlha oa mefuta e 'meli ea metsoako e fapaneng ea sebopeho sa thepa ea loop conductor e koetsoeng, ha mocheso oa mocheso o le pheletsong ka bobeli, lupu e tla ba le maqhubu a motlakase, a neng a le teng lipakeng tsa matla a electromotive lipheletsong ka bobeli - thermoelectric emf. , sena ke seo ho thoeng ke Seebeck effect (Seebeck effect).Likarolo tse peli tse fapaneng tsa homogeneous conductor eleketrode e le mocheso, mocheso ke e phahameng bakeng sa mosebetsi oa qetellong ea qetellong ea, qetellong e 'ngoe ea mocheso o tlaase e le qetello ea mahala, hangata qetellong ea mahala tlas'a mocheso o sa khaotseng.Ho ea ka emf ea thermoelectric e le mosebetsi oa mocheso, tafole ea indexing ea thermocouple;Tafole ea indexing ke mocheso oa pheletso ea mahala ho 0 ℃, tlas'a maemo a li-thermocouple tse fapaneng tse nang le tafole e fapaneng ea indexing.
Access ka sekgoqetsane thermocouple ha thepa ea boraro tšepe, mabitso a mabeli ka mocheso tšoanang nako e telele e le lintho tse bonahalang tse, e hlahisoang ke thermocouple thermoelectric e behiloe ho lula e le 'ngoe, e sa angoang ke ho fihlella boraro tšepe ka lupu.Ka hona, ha tekanyo ea mocheso oa thermocouple, e ka kopanngoa le sesebelisoa sa ho lekanya, se lekantsoeng ka mor'a li-emfs tsa thermoelectric, se ka tseba mocheso oa mocheso o lekantsoeng.Thermocouple lekanya mocheso ho fihlela qetellong a batang (ho lekanya qetellong bakeng sa ho chesa qetellong, qetellong ea loto e amanang le potoloho ea tekanyo e bitsoa batang mateano) mocheso o bolokoa kamehla, boholo ba bokhoni ba thermoelectric le mocheso o lekantsoeng ka kamano e itseng ea tekanyo.Ha ho lekanya, mocheso o batang oa ho qetela o fetoha (tikoloho), o tla ama ka ho teba ho nepahala ha tekanyo.Nka khato ka matšeliso a qetellong a batang ka lebaka la tšusumetso ea phetoho ea mocheso o batang o bitsoa thermocouple junction compensation e tloaelehileng.E hokahane le sesebelisoa sa ho metha ka sekontiri se khethehileng sa matšeliso.
Mokhoa oa ho bala oa matšeliso a batang a Thermocouple:
Ho tloha ho millivolt ho ea ho mocheso: lekanya mocheso o batang le phetoho bakeng sa litekanyetso tse lumellanang tsa millivolt, litekanyetso tsa millivolt ka thermocouple, phetoho ea mocheso;
Ho tloha mocheso ho ea ho millivolt: lekanya mocheso oa 'nete le mocheso oa ho qetela o batang le phetoho bakeng sa litekanyetso tsa millivolt, ka ho latellana, ka mor'a ho tlosa litekanyetso tsa millivolt, mocheso o potlakileng.
Nako ea poso: Dec-04-2020