Ukulinganisa izinga lokushisa kungenye yezici ezibalulekile ekulawuleni inqubo phakathi kwezimboni. I-Resistance Temperature Detector (RTD) kanye ne-Thermocouple (TC) ziyizinzwa ezimbili zokushisa ezisetshenziswa kakhulu. Ngayinye yazo inesimiso sayo sokusebenza, ububanzi bokulinganisa obusebenzayo kanye nezici. Ukuqonda okuphelele kwezici zazo kunegalelo ekususeni ukungabaza nokwenza izinqumo ezinolwazi ngokulawula inqubo. Njengoba umuntu engase azibuze ukuthi angakhetha kanjani okunye esikhundleni salokho lapho idivayisi yamanje ye-RTD idinga ukushintshwa, ingabe okunye ukumelana nokushisa kungaba kuhle noma i-thermocouple ingaba ngcono.
I-RTD (Isitholi Sokushisa Sokumelana)
I-RTD isebenza ngesimiso sokuthi ukumelana kukagesi kwezinto zensimbi kuyashintsha ngokushisa. Ngokuvamile eyenziwe nge-platinum, i-RTD Pt100 ibonisa ubudlelwano obuqagelwayo nobucishe bube buqondile phakathi kokumelana nokushisa lapho i-100Ω ihambisana no-0℃. Isikhathi sokushisa esisebenzayo se-RTD sicishe sibe ngu-200℃ ~ 850℃. Noma kunjalo, uma ububanzi bokulinganisa buwela ngaphakathi kuka-600℃ ukusebenza kwayo kungathuthukiswa kakhulu.
I-Thermocouple
I-Thermocouple iyithuluzi elisetshenziselwa ukukala izinga lokushisa ngokusebenzisa umphumela we-seebeck. Yakhiwe ngezinsimbi ezimbili ezingafani ezihlanganiswe ekugcineni ngakunye. Kukhiqizwa i-voltage ehambisana nomehluko wokushisa phakathi kwe-junction eshisayo (lapho kuthathwa khona isilinganiso) kanye ne-junction ebandayo (egcinwa njalo njengezinga lokushisa eliphansi). Ngokwenhlanganisela yezinto ezisetshenziswayo, i-thermocouple ingahlukaniswa ngezigaba eziningi ezithinta ububanzi bayo bokushisa kanye nokuzwela. Isibonelo, i-Type K (NiCr-NiSi) yanele ukusetshenziswa kuze kufike ku-1200℃ kuyilapho i-Type S (Pt10%Rh-Pt) ikwazi ukukala kuze kufike ku-1600℃.
Ukuqhathanisa
Ububanzi bokulinganisa:I-RTD isebenza kahle kakhulu phakathi kobude obungu -200~600℃. I-Thermocouple ifaneleka ekushiseni okuphezulu kakhulu kusukela ku-800~1800℃ kuye ngokuthi ingakanani, kodwa ngokuvamile ayinconywa ukuthi ilinganiswe ngaphansi kuka-0℃.
Izindleko:Izinhlobo ezivamile ze-thermocouple ngokuvamile zishibhile kune-RTD. Kodwa-ke, ukuphothula okuphezulu kwe-thermocouple eyenziwe ngezinto eziyigugu kungaba kubi kakhulu, futhi izindleko zayo zingase zishintshe ngokuya ngemakethe yensimbi eyigugu.
Ukunemba:I-RTD yaziwa ngokunemba okuphezulu nokuphindaphindeka, ihlinzeka ngokufundwa kwezinga lokushisa okunembile kokulawula izinga lokushisa okuqinile okudinga ukusetshenziswa. I-Thermocouple ngokuvamile ayinembile kangako kune-RTD futhi ayiyona ingcweti kakhulu ekushiseni okuphansi (<300℃). Ukuphothula iziqu kwaseyunivesithi ngabe kuthuthukise ukunemba.
Isikhathi Sempendulo:I-Thermocouple inesikhathi sokuphendula esisheshayo uma iqhathaniswa ne-RTD, okwenza ikwazi ukumelana nezinqubo ezishintshashintshayo lapho izinga lokushisa lishintsha khona ngokushesha.
Umphumela:Umphumela wokumelana we-RTD uvame ukubonisa ukusebenza okungcono ekuzinzeni kwe-long-tern kanye nokuhleleka kunesignali ye-voltage ye-thermocouple. Imiphumela yazo zombili izinhlobo zezinzwa zokushisa ingaguqulwa ibe yisignali yamanje engu-4~20mA kanye nokuxhumana okuhlakaniphile.
Kusukela kolwazi olungenhla singaphetha ngokuthi isici esibalulekile sokukhetha phakathi kwe-RTD ne-thermocouple ubude besikhathi sokushisa okuzosetshenziswa. I-RTD iyinzwa ekhethwayo ebangeni lokushisa eliphansi eliphakathi ngenxa yokusebenza kwayo okuphezulu, kuyilapho i-thermocouple inamandla kakhulu ngaphansi kwezinga lokushisa eliphakeme ngaphezu kuka-800℃. Sibuyela esihlokweni, ngaphandle kokuthi kukhona ukulungiswa noma ukuphambuka ekushiseni kokusebenza kwenqubo, ukushintshwa kwe-thermocouple akunakwenzeka kakhulu ukuthi kuholele enzuzweni noma ekuthuthukisweni okukhulu okuvela esenzweni sokuqala se-RTD. Zizwe ukhululekile ukuxhumana nathi.Shanghai Wangyuanuma kukhona okunye ukukhathazeka noma isidingo mayelana ne-RTD kanye ne-TR.
Isikhathi sokuthunyelwe: Disemba 30-2024