RTD sensor

Awoodda biraha in la beddelo guryaha jireed sarkhaansan yihiin heerkulka waxaa si balaadhan looga isticmaalaa in instrumentation. Sidaas darteed, tusaale ahaan, heerkulbeegga iska caabin platina isticmaalaa hantida bir ah si loo kordhiyo ay iska caabin korontada la sii kordhaya heerkulka. Tusaale ahaan, at t = 0 ^C. platina ayaa resistivity ah 100 ohms.

Resistance Heerkulbeeg - a mitir control, kaas oo gudbiya u dirato impedance signal a hadda u dhexeeya xiriirada shidma. dirato maaraysa xogta oo u dirta nidaamka SCADA ah, halkaas oo shaqaale hore u arki kartaa xaaladda ay ku sugan heerkulka ee nidaamka wax soo saarka ah. heerkulbeegga iska caabin A waxaa loo isticmaalaa sida kiimikada ah iyo wax soo saarka ah si farsamaysan.

design shidma waa mid fudud ilaa xad. heerkulbeegga iska caabin ah Copper ka kooban yahay saddex xiriirada, labo ka mid ah kuwaas oo lagu xiray in midba midka kale, iyo kii saddexaad - wadarta guud, waxa uu leeyahay iska caabin ah 120 ohms. xirmaan habka saddex-silig inta badan waa, in kastoo ay jiraan reeban. cable ka soo qalabka si ay gacanta waa in laga ilaaliyo faragelin dhinac saddexaad. Waxa aan la soo wada dhigay fiilo koranto oo waa in lagu gaashaan.

circuit Operating waa sida soo socota: RTD - caqabad - habka ay gacanta si toos ah. qalab ayaa la dhajinta on the tuubooyin, habka tiirar, loo isticmaalo cabbirka heerkulka ee saa'idka bambooyin shaqeeya. The shaqo RTD aan qabyo ahayn oo si caddaalad ah sax ah akhrinta ay kala duwan yihiin ugu badnaan dhabta ah ee 0.7 darajo.

Tan iyo design ee qalab noocan oo laftiisa ah, sida heerkulbeegga iska caabin ah, waxaa si toos ah ee la xiriira suuqa kala iibsiga ka dhexdhexaad ah kululeeyo si resistor ah, ka dibna la rakibey waa la tixgeliyaa oo shidma goobta. tuubooyin waa in la dahaaran, at hal dhibic ka siiyey heerka socodka dhexdhexaadka ah waa in la gaarsiiyaa. baadi The in cabbirka yarayn kartaa isbeddelka fikirka ah ee dhererka ul shidma si TC dhexroor. Ka badan ay noqon more doonaa, si fiican u noqon doontaa natiijada. qoto dheer bilowga ah waa in loo xisaabiyaa iyo xaaladda dhexdhexaad kala iibsiga kulaylka in la qiyaasay. Tusaale ahaan, in deegaan-kuleyl aad u sareeya sida uumi ah ama cabitaanno ah waa in ka badan 1.5 jeer dhererka firfircoon ee qalab heerkulbeeg iska caabin ah.

"Thermowell" marka hore inta lagu guda jiro rakibaadda ee doorashada ee meel. Noocan ah darafta ilaaliya, loogu tala galay si loo fududeeyo disassembly of qalabka, si shidma waxaa lagu beddeli karaa oo aan istaagin geedi socodka. Tan iyo markii ay kala duwan ee cabbirka heerkulka waa in kala duwan ee 200 600 degrees Celsius, darafta ilaaliya waxaa laga sameeyey bir. Marka loo isticmaalo in dagaal dalaka deegaan acidic ama aasaasiga ah dahaarka leh kula halabuurka ah polymer gaar ah u adkaysata dhexdhexaad qiyaasay.

Qalabka heerkulka cabira Resistance waxaa soo saaray dalal badan oo caalamka ah. The lagu daydo ugu fiican u yaqaan: American ah "Wika", Ruush "Metran" iyo Yurub "Endress Hauser". Qalabka waxay leeyihiin Heer sare ah ee isku halaynta. Waxay awoodaan in ay gudbiyaan heerkulka joogto ah, laakiin sidoo kale in la sameeyo cabbiraadda heerkulka si degdeg ah la beddelo ma aha oo kaliya.