Hauv liaj teb xws li kev siv tshuab ua lag luam, kev lag luam precision, thiab kev ntsuas kom sov, ntsuas kub yog qhov txuas tseem ceeb hauv kev ua kom muaj kev nyab xeeb ntau thiab zoo. Thermocouples thiab tawm tsam ntsuas kub (RTDs ntsuas kub (RTDs) yog ob qho kev ntsuas ntsuas qhov tseeb, tab sis lawv muaj qhov sib txawv ntawm cov ntsiab cai, kev ua tau zoo, thiab thov cov xwm txheej. Kab lus no, ua ke nrog cov ntaub ntawv kev sib piv, yuav pab koj nrhiav qhov yog.
I.Princle: Ua Haujlwm Me Me Me Me thiab Cov Khoom Xaiv
Thermocouples: Kub Txias raws li Thermoelectric effect
Xyoo 1821, Thomas pom pom qhovSaib cov nyhuv: Thaum ob tus khub sib txawv tsim ib lub voj kaw, yog tias muaj qhov sib txawv ntawm lub voj (thiab nws tus nqi muaj qee qhov kev sib raug zoo nrog qhov kub sib txawv. Los ntsuas ntsuas lub peev xwm thermoelectric, tus nqi kub tuaj yeem ua tau zoo.
Ib lub thermocouple muaj ob qho sib txawv nrog ob txoj kev sib tw: "kub sib tshuam" (hauv kev sib chwv "(tswj hwm ntawm qhov siv kub).
Thaum muaj qhov sib txawv kub ntawm kev sov siab thiab kev sib kis txias, cov hluav taws xob ntws ntawm cov hlau los ua qhov kub thiab txias. Qhov ntsuas kub yuav raug suav los ntawm kev ntsuas qhov hluav taws xob no.
Yog li ntawd, thermocouples tsis tas yuav muaj kev siv hluav taws xob sab nraud thiab ua haujlwm hauv tus kheej - powered yam.
RTDs: Siv cov yam ntxwv ntawm kev tawm tsam hloov nrog qhov kub
Lub hauv paus ntsiab lus ntawm cov khoom siv kub tsis kam kub (RTD) yog tias qhov tsis kam ntawm cov hlau hloov nrog qhov kub:
Feem ntau cov RTDs yog ua los ntawm cov hlau ua kom huv si, thiab qhov ntsuas kub ntawm kev tiv thaiv (TCR) yog lub cim tseem ceeb. Raws li cov kub nce, qhov kev co ntawm cov hlau Atoms intensifies, thiab cov kuj ua kom tsis nce ntxiv. Los ntawm kev ntsuas cov kev tawm tsam (nrog kev koom tes ntawm ib qho chaw tam sim no thiab voltmeter), qhov ntsuas kub tuaj yeem suav tau.
Piv txwv li, tus txheem txheem platinum tsis kam (PT100, nrog kev tiv thaiv 100ω ntawm 0 degree), thiab cov khoom siv npib tsib xee thiab tooj. Txawm hais tias cov ntaub ntawv zoo li tooj liab (Cu) thiab Nickel (NI) muaj qhov tseem ceeb rau lwm cov ntaub ntawv, uas yog qhov tseem ceeb tshaj plaws ntawm 20} Cov ntsiab lus tseem ceeb tshaj tawm los ntawm Asmeskas nist).
Ii. Kev sib piv ntawm kev ua tau zoo thiab cov yam ntxwv
|
Cov yam ntxwv |
Qhov cua Thermoco |
Rtds |
|
Qhov ntsuas kub ntau |
Dav (-400℃mus rau 1600 degree, nyob ntawm seb hom) |
Nqaim (feem ntau -200℃rau 600 degree) |
|
Kev ua yog |
Nruab Nrab (± 0.5℃rau ± 2 degree) |
Siab (platinum rTDs tuaj yeem ncav cuag ± 0.1 Qib rau ± 0.3 Qib) |
|
Lus teb ceev |
Cauj (millisecond theem) |
Slower (thib ob theem, vim yog cov hlau loj) |
|
Ib puag ncig kev yoog |
Tiv taus kev co thiab corrosion (nrog sheathing tsim nyog) |
Cov tsis yooj yim, nkag siab rau kev ntxhov siab |
III. Daim Ntawv Thov Kev Ua Si: txiav txim los ntawm qhov yuav tsum tau ua
Thermocoples ua tau zoo nyob rau hauv ib puag ncig heev ib puag ncig, tshwj xeeb tshaj yog haum rau:
Siab -} kev siv kub (xws li steelmaking steel, iav tsim, cua sov saib).
Harsh qhov chaw co, corrosion, lossis tawg -} Cov zaub mov pov thawj hauv cov nroj tsuag thiab tshuaj lom neeg).
Qee lub sij hawm yuav tsum tau teb sai (xws li tso pa tawm hauv tsheb lossis aerospace).
RTDs yog qhov tsim nyog dua rau nruab nrab thiab qis {-} qhov kub thiab txias scenarios nrog cov kev xav tau siab:
Kuaj thiab kev tshawb fawb tshawb fawb (xav tau kev tswj qhov kub nruj).
Cov khoom noj thiab cov khoom noj khoom haus (xav tau kev ntsuas qhov tseeb thiab ruaj khov los ua kom tau raws li cov qauv kev nyab xeeb).
HVAC cov tshuab thiab cov khoom lag luam semiconductor (qhov me me sib txawv tuaj yeem cuam tshuam kev ua tau zoo).
Hongtai Thermocouple / RTD Adasit Module: ntsuas qhov yooj thiab meej
Hongtai cov ntsuas kub ntsuas yog tsim rau cov kev ntsuas kub kub thiab huab cua:
Kev txhawb nqa thermocouple:Tau tshaj txhua hom xws li K, N, E, T, S, S, B, hais txog kev ntsuas kub dav.
RTD POM ZOO:Haum rau 2 {{{- xaub tawj / 3-xaim pt100 thiab PT1000 sensors, ntsib cov kev ntsuas siab.
Qhov ruaj khov:Nrog ntau tshaj 20 xyoo ntawm kev tsim kev tsim, ib - xyoo tom qab {2} Kev muag khoom, kev lag luam thiab txuag tau.
Kev cog lus me thiab hloov tau:Customizable loj loj, txhawb phab ntsa {{0} mounted lossis tsheb ciav hlau installation, tsim nyog rau kev lag luam khoom nrog txwv chaw.
Txawm hais tias nyob rau hauv siab - kub metallTorcical kev cob qhia thiab precisent chaw kuaj mob thiab ruaj khov chaw ntawm kev soj ntsuam qhov kub thiab txias.