I-Thermocouple iyithuluzi lokushisa elisetshenziswa kakhulu ekulinganisweni kokushisa

Okokuqala, i-i-thermocouple iyithuluzi lokushisa elivame ukusetshenziswa esilinganisweni sokushisa. Izici zayo eziyinhloko ziwuhlobo olubanzi lokulinganisa ukuqabula, ukusebenza okuzinzile, isakhiwo esilula, impendulo enhle eguquguqukayo, futhi ingadlulisela amasignali kagesi angu-4-20mA ukude, okulula ukulawula okuzenzakalelayo. Nokulawula okumaphakathi.
Umgomo wei-thermocoupleisilinganiso sezinga lokushisa sisekelwe kumphumela we-thermoelectric. Ukuxhuma ama-conductor amabili ahlukene noma ama-semiconductors ku-loop evaliwe, lapho amazinga okushisa ezindaweni ezimbili ezihlanganayo ehlukile, amandla e-thermoelectric azokhiqizwa ku-loop. Lesi simo sibizwa ngokuthi umphumela we-pyroelectric, owaziwa nangokuthi umphumela we-Seebeck.

Amandla we-thermoelectric akhiqizwa ku-loop evaliwe aqukethe izinhlobo ezimbili zamandla kagesi; amandla we-thermoelectric namandla wokuxhumana. Amandla we-Thermoelectric abhekisa emandleni kagesi akhiqizwa yizingxenye ezimbili zomqhubi ofanayo ngenxa yamazinga okushisa ahlukile. Abaqhubi abahlukahlukene banamandla ahlukahlukene we-electron, ngakho-ke bakhiqiza amandla ahlukile kagesi. Amandla wokuxhumana asho lapho abaqondisi ababili abahlukene bexhumana nabo.

Ngoba ukuminyana kwabo kwe-electron kwehlukile, inani elithile lokusabalalisa kwe-electron liyenzeka. Lapho zifinyelela kokulingana okuthile, amandla akhiwa amandla wokuxhumana ancike ezintweni ezibonakalayo zabaqhubi ababili abahlukene kanye nezinga lokushisa lamaphoyinti abo wokuxhumana. Njengamanje, i-ama-ama-i-thermocouplesezisetshenziswa emazweni omhlaba zinendinganiso. Ama-ama-ama-i-thermocouples alawulwa ngamazwe ngamazwe ahlukaniswe izigaba eziyisishiyagalombili ezihlukene, okungukuthi B, R, S, K, N, E, J kanye no-T, ezingakala izinga lokushisa eliphansi. Ilinganiselwa ku-270 degrees Celsius ngaphansi kweziro, futhi ingafinyelela izinga eliphezulu lika-1800 degrees Celsius.

Phakathi kwabo, uB, R, no-S bangabochungechunge lweplathinamu ye-ama-ama-i-thermocouples. Njengoba i-platinum iyinsimbi eyigugu, babizwa nangokuthi ama-ama-ama-i-thermocouples ayigugu futhi okusalayo kubizwa ngokuthi ama-ama-ama-i-thermocouples ensimbi anentengo ephansi. Kunezinhlobo ezimbili zezinhlaka ze-i-thermocouple, uhlobo oluvamile nohlobo lwezikhali. Ama-ama-ama-i-thermocouples ajwayelekile ngokuvamile akhiwe nge-thermode, i-insulating tube, umkhono wesondlo nebhokisi lokuhlangana, kuyilapho i-i-thermocouple yezikhali iyinhlanganisela yocingo lwe-i-thermocouple, impahla yokwambathisa kanye nomkhono wokugcinwa kwensimbi ngemuva komhlangano, ngemuva kokudonsa inhlanganisela eqinile eyakhiwe ngokuzelula.