Kub yog qhov kev txhawj xeeb tseem ceeb rau feem ntau cov txheej txheem kev lag luam. Cov cuab yeej tseem ceeb ntawm qhov kub thiab txias yog qhov nce lossis txo qhov kub yuav cuam tshuam rau lub zog txav ntawm cov khoom hauv ib feem. Feem ntau, lub sensor lossis transducer yog lub cev lub cev uas tuaj yeem hloov cov txheej txheem hloov pauv mus rau hom teeb liab uas xav tau. Kab lus yuav piav qhia luv luv txog dab tsi yog qhov ntsuas kub ntsuas.
Qhov kub thiab txias yog ib qho kev ntsuas ntau dua ntawm cov khoom siv lossis nws cov xwm txheej ib puag ncig, tshwj xeeb tshaj yog rau cov khoom siv hluav taws xob. Qhov no yog vim cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob tsim hluav taws xob thiab xav tau qee yam kev tswj xyuas thermal. Muaj ntau ntau hom kub sensors haum rau xws li daim ntaub ntawv thiab muab txawv zog los yog specifications. Piv txwv li, lub ntsuas kub ntsuas tuaj yeem muab qhov tso tawm analog lossis digital. Cov nram qab no yog qee hom kub sensors: tsis zoo kub coefficient thermistors, tiv thaiv kub ntsuas, thermocouple sensors, semiconductor sensors, infrared sensors, thiab lwm yam.
Tus nqi ntawm qhov ntsuas kub ntawm qhov ntsuas kub yog nyob ntawm hom kev ua haujlwm nws tsim nyog rau. Txawm li cas los xij, qhov ntsuas qhov tseeb ntawm qhov ntsuas kub ntsuas yuav txiav txim siab nws tus nqi. Yog li ntawd, tus nqi yog nyob ntawm qhov tseeb ntawm qhov ntsuas kub ntawm qhov ntsuas. Cov ntsuas kub tam sim no yog tsim los txo cov nqi thiab kev ua haujlwm zoo.
Thermistor sensor: Nws yog lub npe luv rau qhov tsis zoo ntawm qhov kub thiab txias coefficient thermistor. Nws yog ib hom tshwj xeeb ntawm resistor uas nws tsis kam hloov raws li qhov kub thiab txias. Cov zis ntawm lub thermistor yog nonlinear vim nws qhov exponential xwm; tab sis nws tuaj yeem raug linearized raws li nws daim ntawv thov. Kev ua haujlwm zoo ntawm cov thermistor sensor yog los ntawm -50 txog 250 ° rau iav-encapsulated thermistor lossis 150 ° rau cov qauv thermistors.
Resistance temperature detector: Resistance temperature detector yog ib qho ntawm cov sensors uas ntsuas tau zoo heev. Hauv qhov ntsuas kub tsis kam, qhov tsis kam yog proportional rau qhov kub thiab txias. Lub sensor yog ua los ntawm platinum, npib tsib xee thiab tooj liab hlau. Nws muaj ntau yam kev ntsuas kub thiab siv tau los ntsuas qhov ntsuas kub ntawm -270oC txog +850oC. Ib qho RTD xav tau qhov chaw sab nraud tam sim no los ua haujlwm zoo. Txhawm rau siv RTD los ntsuas qhov ntsuas kub, nws yuav tsum txuas nrog tus choj Wheatstone thiab qhov chaw tsis tu ncua. Ntsuas qhov hluav taws xob tso zis los txiav txim qhov tsis kam. Tom qab ntawd, qhov ntsuas kub tuaj yeem muab tau los ntawm cov kab hluav taws xob tiv thaiv-kub sib raug zoo ntawm RTD muab.
Thermocouple sensors yog ib qho kev sib cuag kub sensors. Lawv yog cov compact, pheej yig, yooj yim rau siv, thiab tuaj yeem teb sai sai rau qhov kub thiab txias. Nws muaj cov khoom siv ntsuas, uas tuaj yeem ua iav lossis epoxy coated, thiab muaj 2 xov hlau kom lawv tuaj yeem txuas rau hauv Circuit Court. Lawv ntsuas qhov kub thiab txias los ntawm kev ntsuas cov kev hloov pauv ntawm qhov tam sim no tsis kam. Lub thermistor muaj ob daim ntawv, NTC lossis PTC, thiab feem ntau muaj tus nqi qis dua.
Semiconductor sensor: Ib qho khoom siv hluav taws xob semiconductor yog cov khoom siv uas tshwm hauv daim ntawv IC. Feem ntau, cov sensors no hu ua IC kub sensors. Tam sim no tso zis kub sensor, resistor tso zis kub sensor, resistor tso zis silicon kub sensor, diode kub sensor, digital tso zis kub sensor. Tam sim no semiconductor kub sensors muab siab linearity thiab siab raug nyob rau hauv ib tug khiav hauj lwm ntau yam ntawm kwv yees li 55 ° C mus rau +150 ° C.
Lub infrared sensor yog ib qho cuab yeej hluav taws xob, thiab infrared sensor yog qhov ntsuas kub tsis sib cuag. Lawv yog cov khoom siv photosensitive uas tuaj yeem ntes infrared (IR) hluav taws xob los ntawm cov cheeb tsam ib puag ncig lossis cov khoom siv ntsuas kub. Cov sensors no tau muab faib ua thermal infrared sensors thiab quantum infrared sensors.
Cov kab lus feem ntau qhia txog dab tsi yog qhov ntsuas kub ntsuas ntsuas. Koj tuaj yeem kawm tau tias muaj ntau hom kev ntsuas kub uas haum rau kev ntsuas qhov ntsuas kub thiab muab cov haujlwm sib txawv lossis cov lus qhia tshwj xeeb los ntawm kev tshawb nrhiav cov ntawv sau tag nrho. Piv txwv li, lub ntsuas kub ntsuas tuaj yeem muab qhov tso tawm analog lossis digital. Cov nram qab no yog qee hom kub sensors: tsis zoo kub coefficient thermistors, tiv thaiv kub ntsuas, thermocouple sensors, semiconductor sensors, infrared sensors, thiab lwm yam.
