Kana paine maconductor maviri akasiyana kana semiconductor A uye B kuumba A loop, migumo yayo yese yakabatana, chero tembiricha yemanodhi maviri ichisiyana, tembiricha yekupedzisira yeT, inonzi magumo kana kupisa kwekupedzisira basa, kune rimwe divi. kupera tembiricha T0, inozivikanwa seyemahara magumo (inozivikanwawo sereferensi divi) kana kutonhora kupera, dunhu rinoburitsa simba remagetsi, kutungamira uye saizi yesimba remagetsi zvine hukama neiyo conductor zvinhu uye tembiricha yevaviri vanosangana. .Chiitiko ichi chinodaidzwa kuti thermoelectric effect, mhando mbiri dze conductor circuit dzinozivikanwa se "thermocouple", inoumbwa nemakondakita maviri anonzi "hot" electrode, simba re electromotive rinonzi "thermoelectric emfs.
Thermoelectric emfs inoumbwa nezvikamu zviviri zvesimba re electromotive, chikamu chechipiri kondakita kubata electromotive simba, chimwe chikamu chimwechete kondakita wetembiricha musiyano electromotive simba.
Saizi ye thermocouple loop thermoelectric emfs, chete nekuumbwa kweiyo thermocouple conductor zvinhu zvine chekuita nekudziya kweaviri kusangana, uye haina chekuita nekukura kwechimiro che thermocouple.Mushure meiyo thermocouple yakamisa zvinhu zviviri zve electrode, tembiricha yekusangana t uye thermoelectric emfs maviri t0.Basa racho harina kunaka.
Iyi equation yakashandiswa zvakanyanya mukuyera kwekushisa chaiko.Nekuda kwekutonhora kunopera t0 kusingachinji, inogadzirwa ne thermocouple thermoelectric emfs chete (kuyerwa) yekupisa kunopisa kunosiyana, iyo thermoelectric emfs inoenderana neimwe tembiricha.Chero bedzi isu tichishandisa nzira yekuyera iyo thermoelectric emfs inogona kuzadzisa chinangwa chekuyera kuyera.
Kuyera tembiricha yeThermocouple ndiyo musimboti wemhando mbiri dzakasiyana dzeyakavharwa loop conductor zvinhu kuumbwa, kana tembiricha gradient iri kumigumo yese, loop ichange iine magetsi inopfuura nepakati, yaivepo pakati pesimba re electromotive kumativi ese - thermoelectric emf. , iyi ndiyo inonzi Seebeck effect (Seebeck effect).Zvikamu zviviri zvakasiyana zvehomogeneous conductor electrode sekupisa, tembiricha yakakwira yekushanda pamagumo ekupedzisira, imwe mugumo weiyo yakaderera tembiricha senge yakasununguka magumo, kazhinji yemahara magumo pasi pekushisa kusingaperi.Maererano ne thermoelectric emf sekushanda kwekushisa, iyo thermocouple indexing table;Indexing tafura ndeye yemahara yekupedzisira tembiricha pa 0 ℃, pasi pemamiriro akasiyana thermocouples ane akasiyana indexing tafura.
Kupinda mu thermocouple loop apo yechitatu simbi zvinhu, vaviri vanobatana panguva imwe tembiricha kureba zvinhu, anobudiswa thermocouple thermoelectric inoiswa kuti irambe yakafanana, iyo isingakanganisike neyechitatu simbi kuwana ari loop.Naizvozvo, kana iyo thermocouple tembiricha kuyerwa, inogona kubatanidzwa kune yekuyera chiridzwa, yakayerwa mushure meiyo thermoelectric emfs, inogona kuziva tembiricha yeyakayerwa yepakati.Thermocouple yekuyera tembiricha kusvika kunotonhora kumagumo (kuyeresa kumagumo kunopisa, pakupera kwemutobvu wakabatana nechiyero chedunhu kunonzi kutonhora junction) tembiricha inochengetwa isingachinji, saizi yekugona kwethermoelectric uye tembiricha yakayerwa mune imwe chiyero hukama.Pakuyera, kutonhora kwekupedzisira kwekushisa kunoshanduka (zvakatipoteredza), kuchakanganisa zvakanyanya kurongeka kwekuyera.Tora chiito panotonhora kupera muripo nekuda kwekukanganisa kwekutonhora kwekupedzisira shanduko inonzi thermocouple cold junction compensation inowanzoitika.Yakabatanidzwa kune yekuyeresa mudziyo ine yakakosha muripo conductor.
Thermocouple inotonhora junction muripo wekuverenga nzira:
Kubva pamillivolt kusvika kune tembiricha: kuyera kutonhora kwekupedzisira tembiricha uye kutendeuka kune inoenderana millivolt kukosha, millivolt kukosha ne thermocouple, tembiricha shanduko;
Kubva pane tembiricha kusvika kune millivolt: pima tembiricha chaiyo uye kutonhora kwekupedzisira tembiricha uye kutendeuka kune millivolt kukosha, zvichiteerana, mushure mekubvisa millivolt kukosha, nekukurumidza tembiricha.
Nguva yekutumira: Zvita-04-2020