Umlinganiselo wobushushu ngomnye wemiba ebalulekileyo kulawulo lwenkqubo phakathi kwamashishini. I-Resistance Temperature Detector (RTD) kunye ne-Thermocouple (TC) zimbini zezona zinzwa zobushushu zisetyenziswa ngokuqhelekileyo. Ngamnye kubo unomgaqo wayo wokusebenza, uluhlu olusebenzayo lokulinganisa kunye neempawu. Ukuqonda ngokubanzi iimpawu zabo kunegalelo ekupheliseni amathandabuzo kunye nokwenza isigqibo esinolwazi ngolawulo lwenkqubo. Njengomntu unokuzibuza ukuba ungayikhetha njani indawo endaweni xa isixhobo sangoku se-RTD sifuna ukutshintshwa, ngaba enye ukuxhathisa kwe-thermal ilungile okanye i-thermocouple ingcono.
I-RTD
I-RTD isebenza kumgaqo wokuba ukuxhathisa kombane kwizinto zetsimbi kuyatshintsha ngobushushu. Ngokuqhelekileyo yenziwe ngeplatinam, i-RTD Pt100 ibonisa unxulumano oluqikelelwayo kunye oluphantse lube ngumgca phakathi kokuchasana nobushushu apho i-100Ω ihambelana ne-0℃. Ubushushu obusebenzayo be-RTD bujikeleze -200℃~850℃. Nangona kunjalo, ukuba uluhlu lokulinganisa luwela ngaphakathi kwe-600 ℃ ukusebenza kwalo kunokuphuculwa ngakumbi.
Thermocouple
I-Thermocouple sisixhobo esisetyenziselwa ukulinganisa ubushushu ngesiphumo seebeck. Iqulathe iintsimbi ezimbini ezahlukeneyo ezidityanisiweyo kwisiphelo ngasinye. Kuveliswa amandla ombane alingana nomahluko wobushushu phakathi kwesiphambuka esishushu (apho umlinganiselo uthathwa khona) kunye nendawo ebandayo (ehlala igcinwa njengobushushu obusezantsi). Ngokwendibaniselwano yezinto ezisetyenzisiweyo, i-thermocouple inokwahlulwa ibe ngamacandelo amaninzi achaphazela ubushushu babo kunye novelwano. Umzekelo, Uhlobo lwe-K (NiCr-NiSi) lwanele ukusetyenziswa ukuya kuthi ga kwi-1200℃ ngelixa i-Type S (Pt10%Rh-Pt) ikwazi ukulinganisa ukuya kwi-1600℃.
Ukuthelekisa
Uluhlu lokulinganisa:I-RTD isebenza kakhulu phakathi kobude obuyi-200~600℃. I-Thermocouple ilungele ubushushu obugqithileyo obuphezulu ukusuka kwi-800 ~ 1800℃ ngokuxhomekeke kuthweso-zidanga, kodwa ayikhuthazwa ngokubanzi kumlinganiselo ongaphantsi kwe-0℃.
Ixabiso:Iindidi eziqhelekileyo ze-thermocouple zidla ngaphantsi kwe-RTD. Nangona kunjalo, ukuphumelela okuphezulu kwe-thermocouple eyenziwe kwizinto ezixabisekileyo kunokuba yindleko, kwaye iindleko zayo zinokuguquguquka kunye nemarike yentsimbi exabisekileyo.
Ukuchaneka:I-RTD yaziwa ngokuchaneka okuphezulu kunye nokuphindaphinda, ibonelela ngofundo oluchanekileyo lobushushu kulawulo olungqongqo olufuna usetyenziso. I-Thermocouple ayichanekanga ngokubanzi kune-RTD kwaye ayinabuchule kakhulu kwisithuba sobushushu obuphantsi (＜300℃). Abathweswe izidanga eziphezulu bebeya kuphucula ukuchaneka.
Ixesha lokuPhendula:I-Thermocouple inexesha elikhawulezayo lokuphendula xa lithelekiswa ne-RTD, iyenza ibe namandla ngakumbi kwizicelo zenkqubo eguquguqukayo apho ubushushu buguquka ngokukhawuleza.
Isiphumo:Isiphumo sokuchasana se-RTD sihlala sibonakalisa ukusebenza ngcono kwi-long-tern uzinzo kunye ne-linearity kunesiginali yombane we-thermocouple. Iziphumo zazo zombini iintlobo zesivamvo zobushushu zinokuguqulwa zibe yi-4 ~ 20mA isiginali yangoku kunye nonxibelelwano olukrelekrele.
Ukususela kwingcaciso engentla sinokuthi sigqibe kwelokuba eyona nto ibalulekileyo yokukhetha phakathi kwe-RTD kunye ne-thermocouple lixesha lobushushu obusebenzayo eliza kulinganiswa. I-RTD isesona sivamvo sikhethwayo kuluhlu olusezantsi lobushushu obuphakathi ngokusebenza kwayo okuphezulu, ngelixa i-thermocouple inokuthi ikwazi phantsi kwemeko yobushushu obungaphezulu kwe-800 ℃. Buyela kwisihloko, ngaphandle kokuba kukho uhlengahlengiso okanye ukuphambuka kwinkqubo yokusebenza kweqondo lokushisa, ukutshintshwa kwe-thermocouple akunakwenzeka kakhulu ukuba kubangele inzuzo ebalulekileyo okanye uphuculo kwisiganeko sokuqala se-RTD. Zive ukhululekile ukuqhagamshelanaShanghai Wangyuanukuba kukho nayiphi na enye inkxalabo okanye imfuno malunga ne-RTD & TR.
Ixesha lokuposa: Dec-30-2024