Qhov sib txawv ntawm qhov kub thiab txias sensor thermistor thiab thermocouple

Qhov sib txawv ntawm thermocouples thiab thermal resesors
1. Cov khoom ntawm cov cim sib txawv:
Thermal kuj nws tus kheej yog ib qho resistor, thiab ib lub thermal kuj kub ua haujlwm raws li lub hauv paus uas cov kev tiv thaiv hlau hlau nrog qhov ntsuas kub; Thiab thermocouple: nws yog kaw Circuit Court tsim los ntawm vuam hlau los yog semiconductors ntawm ob cov khoom sib txawv ua ke. Thaum muaj qhov sib txawv ntawm ob qho kev sib txawv ntawm cov xov hlau, ib qho hluav taws xob hluav taws xob yog tsim ntawm lawv, yog li sib sau ua ib qho nyiaj ntawm qhov tam sim no hauv Circuit Court. Qhov tshwm sim no hu ua thermoelectric nyhuv. Thermocouples ua haujlwm los ntawm kev siv cov nyhuv no.
2. Qhov kub thiab txias ranges los ntawm ob sensors yog txawv:
Thermal yuav tshwm sim feem ntau pom nyob rau hauv qhov kub thiab txias ntawm {0}} panoob, thaum muaj qhov kub tshaj plaws hauv thaj tsam ntawm {2}} degrees (lossis siab dua).
3. Cov ntaub ntawv sib txawv:
Tus thermistor yog cov khoom siv hlau uas rhiab rau qhov kub hloov. Tus thermistor yog lub teeb liab uas tsis kam tiv thaiv uas tau tawm los ntawm tus nqi tiv thaiv (ω) tsis muaj tus qauv zoo lossis tsis zoo. Cov khoom siv feem ntau suav nrog PT100 Cu50 .. thiab cov khoom siv sib txawv tsim cov khoom sib txawv ntawm ob qho ntawm ob qho ntawm ob qho ntawm ob qho ntawm cov xov hlau sib txawv vim kub hloov. Nws tuaj yeem faib ua k, s, e, r, t, thiab n-hom sib npaug xov tooj ntawm cov lej ntsuas thiab ntsuas qhov ntsuas kub sib piv. Therocoodles yog cov cim ntsuas hluav taws xob uas tawm millivolts (MV) thiab muaj cov qauv zoo thiab tsis zoo thiab tsis zoo thiab tsis zoo thiab tsis zoo thiab tsis zoo. Muaj qee qhov uas kim tshaj li resistors, thiab qee qhov pheej yig dua cov uas tsim, tab sis suav nrog cov xov hlau kev them nyiaj, cov nqi ntawm tag nrho cov nqi ntawm thermocouples yog siab dua.
4. Qhov kev sib raug zoo nrog PLC yog txawv:
Cov lus tawm tswv yim modules rau thermal resistors thiab thermooples sib raug rau PLCS kuj txawv. This statement is not a problem, but generally PLCs are directly connected to 4-20mA signals, while thermal resistors and thermocouples are usually connected to PLCs with transmitters. Yog tias txuas nrog DCS, tsis tas yuav siv lub transmitter. Tus thermistor yog RTD teeb liab, Thermocouple yog TC lub cim! Plc kuj muaj thermalistion module thiab thermocouple module, uas tuaj yeem ncaj qha cov tswv yim tsis kam thiab thermocouple paib.
Qhov sib txawv ntawm qhov ntsuas kub ntawm lub thermistor thiab ib qho kev ntsuas kub uas yog qhov ntsuas kub ntawm cov resistor hloov nrog kub. Yog li ntawd, ntev li ntev tau hloov ntawm cov thermistor yog ntsuas, qhov ntsuas kub tau ntsuas. Tam sim no, muaj ob hom kev kub nyhwv: cov hauj lwm thermistors thiab semiconductor tus ntsuas cua sov.
Cov nqi tiv thaiv thiab qhov kub ntawm cov thermistor hlau feem ntau yuav yog kwv yees los ntawm kab sib luag hauv qab no: RT {}}}} (t0)]
Hauv cov qauv, RT yog cov tsis kam nqi ntawm qhov kub t; Rt {{{{{0}}}} yog cov tshuaj tiv thaiv tus nqi tiv thaiv ntawm T0 (feem ntau yog {2}} degree); yog cov ntsuas kub. Cov kev sib raug zoo ntawm tus nqi tiv thaiv ntawm semiconductor thermistor thiab kub}} AB / t, qhov twg RT yog tus nqi tiv thaiv thaum kub t; A. B nyob ntawm qhov kev teeb tsa ntawm cov qauv ntawm cov khoom siv semiconductor.
Piv rau lwm tus, tus cua sov muaj qhov kub tshaj tawm thiab siab dua qhov kev ntsuas kub ntawm chav tsev (feem ntau yog qhov ntsuas kub me me ntawm tsuas yog {}} ~ 300 degree. Lawv tau dav siv rau kev ntsuas kub thiab ntsuas thiab tswj cov khoom siv hauv yim neeg thiab tsheb. Cov cua hlau cov cua nab feem ntau haum rau kev ntsuas kub nyob rau hauv cov ntau ntawm {2}}, cim los ntawm kev ntsuas raug, thiab muaj kev ruaj ntseg zoo. Lawv siv dav hauv cov txheej txheem tswj.
Los ntawm cov kev pom ntawm qhov kev hloov pauv ntawm kev tawm tsam nrog kub, feem ntau cov hlau ntsuas hauv kev lag luam nquag siv cov hlau ntsuas cua, tab sis tsis yog txhua tus tuaj yeem siv ua cov ntsuas pa taws. Raws li cov khoom siv hlau rau cov neeg ua haujlwm sov, nws feem ntau yuav tsum muaj qhov kub thiab txias tshaj plaws