Ukulinganisa izinga lokushisa kungenye yezici ezibalulekile ekulawuleni inqubo phakathi kwezimboni. I-Resistance Temperature Detector (RTD) kanye ne-Thermocouple (TC) yizinzwa ezimbili zokushisa ezisetshenziswa kakhulu. Ngamunye wabo unomgomo wawo wokusebenza, ububanzi obusebenzayo bokulinganisa nezici. Ukuqonda okuphelele kwezici zabo kunomthelela ekuqedeni ukungabaza nokwenza izinqumo ezinolwazi mayelana nokulawulwa kwenqubo. Njengomunye angase azibuze ukuthi angakhetha kanjani okubambele lapho idivayisi yamanje ye-RTD idinga ukushintshwa, ingabe okunye ukumelana nokushisa kungaba kuhle noma i-thermocouple ingaba ngcono.
I-RTD (Isitholi Sezinga lokushisa Lokumelana)
I-RTD isebenza ngesimiso sokuthi ukumelana kukagesi kwensimbi kuyashintsha ngokushisa. Ivamise ukwakhiwa ngeplatinamu, i-RTD Pt100 ibonisa ubudlelwano obuqagelekayo futhi obucishe bube yilayini phakathi kokumelana nezinga lokushisa lapho i-100Ω ihambelana no-0℃. Izinga lokushisa elisebenzayo le-RTD lizungeze -200℃~850℃. Noma kunjalo, uma ibanga lokulinganisa liwela phakathi kuka-600℃ ukusebenza kwalo kungathuthukiswa nakakhulu.
Thermocouple
I-Thermocouple iyidivayisi esetshenziselwa ukukala izinga lokushisa ngomphumela we-seebeck. Iqukethe izinsimbi ezimbili ezingafani ezihlanganiswe ekugcineni ngakunye. Kukhiqizwa i-voltage elingana nomehluko wezinga lokushisa phakathi kwendawo yokuhlangana eshisayo (lapho kuthathwa khona isilinganiso) kanye nendawo ebandayo (ehlala igcinwa njengezinga lokushisa eliphansi). Ngokwenhlanganisela yezinto ezisetshenziswayo, i-thermocouple ingahlukaniswa ngezigaba eziningi ezithinta uhla lwazo lokushisa nokuzwela. Isibonelo, Uhlobo K (NiCr-NiSi) lwanele ukusetshenziswa kufika cishe ku-1200℃ kuyilapho uhlobo S (Pt10%Rh-Pt) lukwazi ukukala kufika ku-1600℃.
Ukuqhathanisa
Ibanga lokulinganisa:I-RTD isebenza kakhulu phakathi kwe-span engu -200~600℃. I-Thermocouple ifanele izinga lokushisa eliphezulu elidlulele ukusuka ku-800~1800℃ kuye ngokuthweswa iziqu, nokho ngokuvamile ayinconyelwe ukukalwa ngaphansi kuka-0℃.
Izindleko:Izinhlobo ezijwayelekile ze-thermocouple ngokuvamile zibiza kancane kune-RTD. Kodwa-ke, iziqu eziphezulu ze-thermocouple ezenziwe ngezinto eziyigugu zingabiza, futhi izindleko zakho zingase zishintshe nemakethe yensimbi eyigugu.
Ukunemba:I-RTD yaziwa ngokunemba okuphezulu nokuphindaphinda, ihlinzeka ngokufunda okunembayo kwezinga lokushisa kokulawula okuqinile okudinga izinhlelo zokusebenza. I-Thermocouple ngokuvamile ayinembe kangako kune-RTD futhi ayinalo ulwazi oluningi ngesikhathi sezinga lokushisa eliphansi (＜300℃). Ukuthweswa iziqu kwabadala bekuzoba ngcono ukunemba.
Isikhathi Sempendulo:I-Thermocouple inesikhathi sokuphendula esisheshayo uma iqhathaniswa ne-RTD, iyenza ikwazi ukumelana nezinhlelo zokusebenza zenqubo eguquguqukayo lapho izinga lokushisa lishintsha ngokushesha.
Okukhiphayo:Umphumela wokumelana we-RTD ngokuvamile ubonisa ukusebenza okungcono ekuzinzeni kwesikhathi eside kanye nomugqa kunesiginali ye-voltage ye-thermocouple. Imiphumela yazo zombili izinhlobo zenzwa yezinga lokushisa ingaguqulelwa kusignali yamanje engu-4~20mA kanye nokuxhumana okuhlakaniphile.
Kusukela olwazini olungenhla singaphetha ngokuthi isici esiwujuqu sokukhetha phakathi kwe-RTD ne-thermocouple ubude bezinga lokushisa lokusebenza okufanele likalwe. I-RTD iyinzwa ekhethwayo ebangeni lokushisa eliphansi eliphakathi nendawo ngokusebenza kwayo okuphezulu, kuyilapho i-thermocouple ikwazi kangcono ngaphansi kwezimo zokushisa ezingaphezulu kuka-800℃. Emuva esihlokweni, ngaphandle uma kukhona ukulungiswa noma ukuchezuka kumazinga okushisa enqubo yokusebenza, ukushintshwa kwe-thermocouple mancane amathuba okuthi kuphumele enzuzweni enkulu noma ekuthuthukisweni okuvela kumcimbi wokufaka isicelo we-RTD yasekuqaleni. Zizwe ukhululekile ukuxhumanaShanghai Wangyuanuma kukhona okunye ukukhathazeka noma isidingo mayelana ne-RTD & TR.
Isikhathi sokuthumela: Dec-30-2024