Uyini umehluko phakathi kwe-thermocouple nokumelana okushisayo?

- 2021-10-07-

Njengamanje, i-ama-ama-i-i-thermocouplesesetshenziswa emhlabeni jikelele inemininingwane ejwayelekile. Imithethonqubo yamazwe omhlaba ibeka ukuthi ama-ama-ama-i-i-thermocouples ahlukaniswe ngezigaba eziyisishiyagalombili ezihlukene, okungukuthi B, R, S, K, N, E, J noT, kanti izinga lokushisa elinganisiwe liphansi. Ingakala ngaphansi kuka-270 degrees Celsius kuze kufike ku-1800 degrees Celsius. Phakathi kwabo, u-B, u-R no-S bangabochungechunge lwe-platinum lwama-ama-ama-i-i-thermocouples. Njengoba i-platinum iyinsimbi eyigugu, babizwa nangokuthi ama-ama-ama-i-i-thermocouples ayigugu futhi okusalayo kubizwa nge-Metal i-i-thermocouple eshibhile.


Kunezinhlobo ezimbili zeama-ama-i-i-thermocouples, uhlobo oluvamile nohlobo lwe-armored.

Ama-ama-ama-i-i-thermocouples ajwayelekile ngokuvamile akhiwa i-thermode, ishubhu evikelayo, umkhono ovikelayo kanye nebhokisi lokuhlangana, kuyilapho i-armored i-i-thermocouple iyinhlanganisela yocingo lwe-i-i-thermocouple, izinto ezivikelayo kanye nomkhono wensimbi ovikelayo. Inhlanganisela eqinile eyakhiwe ngokwelula. Kodwa isignali kagesi ye-i-i-thermocouple idinga ucingo olukhethekile ukuze idlulise, lolu hlobo locingo lubizwa ngokuthi ucingo lwesinxephezelo.
Ama-ama-ama-i-i-thermocouples ahlukene adinga izintambo ezahlukene zokunxephezela, futhi umsebenzi wawo oyinhloko ukuxhuma ne-i-i-thermocouple ukugcina ukuphela kwereferensi ye-i-i-thermocouple kude nokunikezwa kwamandla, ukuze izinga lokushisa lokuphela kwereferensi lizinzile.

Izintambo zesinxephezelo zehlukaniswe ngezinhlobo ezimbili: uhlobo lwesinxephezelo nohlobo lokwelulwa
Ukwakheka kwamakhemikhali kocingo lokunwetshwa kuyafana nalokho kwe-i-i-thermocouple enxeshezelwa, kodwa ekusebenzeni, ucingo lokunwetshwa alwenziwa ngento efanayo ne-i-i-thermocouple. Ngokuvamile, ithathelwa indawo ucingo olune-electron density efanayo ne-i-i-thermocouple. Ukuxhumana phakathi kwentambo yesinxephezelo ne-i-i-thermocouple ngokuvamile kucace bha. Isigxobo esihle se-i-i-thermocouple sixhunywe ocingweni olubomvu lwentambo yesinxephezelo, kanti isigxobo esingesihle sixhunywe kumbala osele.

Iningi lezintambo zesinxephezelo ezijwayelekile zenziwe nge-copper-nickel alloy.
I-Thermocouple iyidivayisi yezinga lokushisa esetshenziswa kakhulu ekulinganisweni kwezinga lokushisa. Izici zayo eziyinhloko ububanzi bokulinganisa izinga lokushisa, ukusebenza okuzinzile, isakhiwo esilula, impendulo enhle eguquguqukayo, futhi isidlulisi sokuguqula singadlulisela amasiginali wamanje we-4-20mA ukude. , Ilungele ukulawula okuzenzakalelayo nokulawula okumaphakathi.

Isimiso sei-i-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-thermoelectric, owaziwa nangokuthi umphumela we-Seebeck. Amandla kagesi we-thermoelectric akhiqizwa ku-loop evaliwe akhiwe izinhlobo ezimbili zamandla kagesi; umehluko wezinga lokushisa amandla kagesi kanye namandla okuxhumana kagesi.

Nakuba ukumelana nokushisa kusetshenziswa kabanzi embonini, ukusetshenziswa kwayo kulinganiselwe ngenxa yobubanzi bayo bokulinganisa izinga lokushisa. Isimiso sokulinganisa izinga lokushisa sokumelana nokushisa sisekelwe kunani lokumelana le-conductor noma i-semiconductor eshintshayo nezinga lokushisa. isici. Ibuye ibe nezinzuzo eziningi. Ingakwazi futhi ukudlulisa amasignali kagesi ukude. Inokuzwela okuphezulu, ukuzinza okuqinile, ukushintshashintsha nokunemba. Kodwa-ke, idinga ukunikezwa kwamandla futhi ayikwazi ukukala ukushintsha kwezinga lokushisa ngokushesha.

Izinga lokushisa elikalwa ukumelana nokushisa okusetshenziswa embonini liphansi ngokuqhathaniswa, futhi ukukalwa kwezinga lokushisa akudingi intambo yesinxephezelo, futhi intengo ishibhile.