Kev them nyiaj software tau ua tiav los ntawm peb tus txheej txheem - kauj ruam: " ntsuas qhov txias- qhov kub thiab txias → saib / xam cov nqi them nyiaj → thov kho." Nws yog qhov nthuav dav tshaj plaws thiab siab tshaj -txoj kev them nyiaj raug siv hauv cov tshuab niaj hnub no.
I. Core Implementation Steps of Software Compensation
Kev them nyiaj software vam khom rau microprocessor (MCU), PLC, lossis DCS system los ua cov kev kho tsis siv neeg siv cov tsim - hauv algorithms. Cov kev ua haujlwm tshwj xeeb yog raws li hauv qab no:
1. Tiag -Lub Sijhawm Tau Txais Txias-Qhov Kub Kub
Lub siab - qhov ntsuas kub qhov tseeb (xws li Pt100 platinum tiv thaiv tus pas ntsuas kub, NTC thermistor, lossis DS18B20 digital sensor) tau teeb tsa nyob ze rau qhov ntsuas kub ntawm lub davhlau ya nyob twg.
Txij li thaum lub sensor no nyob rau hauv tib lub thermal ib puag ncig raws li qhov txias hlws ris, nws muab ib tug tiag tiag -lub sij hawm ntsuas ntawm qhov txias tam sim no - hlws ris kub, tcold.
2. Saib -txog los yog xam cov nyiaj tau los
Raws li qhov tshwj xeeb ntawm cov thermocouple uas tau siv (xws li Hom K, Hom S), lub kaw lus nkag mus rau nws cov tsim -hauv cov lus siv los yog cov qauv siv polynomial haum rau xam cov thermoelectric tej zaum E (tcold, 0) uas sib haum rau qhov ntsuas txias -kub kub tcold txheeb ze rau 0℃reference point.
Piv txwv li: Thaum qhov txias txias - qhov kub ntawm qhov sib txuas yog 25 degree, qhov sib thooj rau hom K thermocouple yog kwv yees li E (25 degree) ≈ 1.000 mV.
3. Superposition of Compensation and Determination of Kub-Qhov kub thiab txias
Qhov ntsuas kub ntsuas qhov peev xwm (Emeasured) yog ntxiv rau cov nyiaj them poob haujlwm (E(tcold, 0)*) kom muaj txiaj ntsig tag nrho uas zoo ib yam li muaj qhov txias txias ntawm 0 degree.
Cov txiaj ntsig tseem ceeb: Tsis tas yuav tsum muaj cov khoom siv hluav taws xob nyuaj; Kev them nyiaj yug rau ntau hom thermocouple tuaj yeem ua tiav tsuas yog los ntawm kev teeb tsa software, muab cov kev hloov pauv tau yooj yim thiab qhov tseeb dua.
II. Ob Hom Architectures rau Software Compensation
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Kev tsim vaj tsev |
Txoj kev ua |
Daim ntawv thov Scenario |
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Independent Acquisition + Software Synthesis |
Qhov txias txias - qhov kub thiab txias tau txais los ntawm ADC channel tshwj xeeb, thiab cov haujlwm tseem ceeb sib koom ua ke thiab ua cov ntaub ntawv ob qho tib si. |
DCS, SCADA systems, Industrial PCs |
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Integrated Intelligent Module |
Analog input modules (piv txwv li, Siemens SM1231) feature ua -nyob rau hauv txias- junction sensors thiab them algorithms; lub teeb liab tso zis sawv cev rau qhov twb muaj - tus nqi them nyiaj kub. |
PLC systems, Intelligent Transmitters |
Cov Lus Cim: Niaj hnub nimno PLC / DCS modules dav siv qhov kev tsim qauv sib xyaw ua ke, tso cai rau cov neeg siv kom tau txais cov txiaj ntsig ntawm qhov kub thiab txias ncaj qha yam tsis tas yuav muaj qhov programming ntxiv.
III. Cov ntsiab lus tseem ceeb cuam tshuam rau kev them nyiaj software kom raug
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Qhov xwm txheej |
Kev xav tau |
Kev piav qhia |
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Cold Junction Sensor raug |
Ntau dua lossis sib npaug rau ± 0.1 degree |
Sensor yuam kev txhais ncaj qha rau hauv qhov ntsuas kub ntsuas qhov sib txawv. |
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Installation Txoj hauj lwm |
Nyob rau hauv kev sib cuag ncaj qha nrog thermocouple terminals |
Xyuas kom qhov txias txias qhov sib txuam sib npaug ntawm qhov ntsuas kub thiab tiv thaiv thermal lag. |
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Calibration Table Qhov tseeb |
Ua raws li IEC 60584 tus qauv |
Siv cov txheej txheem nrhiav cov rooj los yog siab - txiav txim polynomial haum (xws li, 9th xaj). |
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ADC daws teeb meem |
Ntau tshaj los yog sib npaug rau 16 ntsis |
Ua kom ntseeg tau tias cov kev hloov pauv hauv feeb tuaj yeem tshawb pom, yog li txhim kho qhov tseeb tag nrho. |
Kev Ua Zoo Tshaj Plaws: Xaiv cov cuab yeej ntse lossis cov qauv nruab nrog tsis siv neeg txias hlws ris them nyiaj muaj peev xwm tuaj yeem txo qhov kev tsim qauv tsis yooj yim.
