Qhov txawv ntawm illuminance meter thiab Brightness meter
Lub illuminance meter (los yog lux meter) yog ib qho cuab yeej tshwj xeeb hauv kev ntsuas luminosity thiab brightness. Nws muaj ib tug tswv tsev thiab lub teeb sensor. Qhov ntsuas ntsuas yog 0-50000. Qhov nruab nrab sab hauv tsev illuminance yog los ntawm 100-1000lux, thiab lub hnub ci sab nraum zoov yog li 50000lux. Lux yog ib chav tsev ntawm illuminance, qhia qhov ceev ntawm lub teeb ci rau ntawm qhov chaw. Nws cov ntawv thov feem ntau yog sab hauv tsev, chaw ua haujlwm, chaw soj nstuam, thiab kev tshawb fawb ib puag ncig.
Lub Brightness meter yog lub ntsuas ntsuas ntsuas lub teeb thiab xim. Lub luminance meter yog ib qho ntawm cov cuab yeej siv thiab cov khoom siv uas yuav tsum tau ua los ntawm txhua lub chaw soj ntsuam tshuaj, thiab tau siv dav hauv ntau yam kev ntsuas ntau thiab zoo.
Lub hauv paus ntsiab lus ntawm illuminometer thiab Brightness meter
Illuminometer
Photovoltaic cells yog cov khoom siv hluav taws xob uas ncaj qha hloov lub teeb lub zog rau hauv hluav taws xob hluav taws xob. Thaum lub teeb tsoo rau saum npoo ntawm selenium photovoltaic cell, qhov teeb meem teeb dhau los ntawm cov hlau nyias zaj duab xis 4 thiab mus txog qhov sib cuam tshuam ntawm semiconductor selenium txheej 2 thiab cov hlau nyias zaj duab xis 4, tsim cov nyhuv photoelectric ntawm lub interface. Qhov loj ntawm lub generated photocurrent muaj ib tug proportional kev sib raug zoo nrog lub illuminance ntawm lub teeb-tau txais nto ntawm lub photocell. Lub sijhawm no, yog tias ib qho kev sib txuas sab nraud txuas nrog, qhov tam sim no yuav ntws, thiab tus nqi tam sim no yuav qhia rau ntawm microammeter nrog lux (Lx) raws li qhov ntsuas. Qhov loj ntawm photocurrent nyob ntawm qhov siv ntawm qhov teeb meem teeb. Lub illuminance meter muaj ib qho kev hloov khoom siv, yog li nws tuaj yeem ntsuas qhov siab illuminance lossis qis illuminance.
Hom Lub Teeb Meter:
1. Visual illuminance meter: siv tsis yooj yim, tsis muaj tseeb, tsis tshua siv
2. Photoelectric illuminance meter: feem ntau siv selenium photocell illuminance meter thiab silicon photocell illuminance meter
Brightness ntsuas
Lub luminance meter feem ntau yog siv ob lub teeb lub qhov nrog ib qho kev ncua deb kom tau txais cov luminous flux nrog lub kaum sab xis ruaj khov thiab thaj chaw teeb pom kev ruaj khov. Tus nqi no tsis hloov nrog qhov kev ncua deb ntawm qhov khoom, tsuav yog qhov chaw ntawm qhov khoom loj txaus. Txhawm rau txhawm rau ntsuas cov khoom ntsuas, feem ntau siv cov duab kos duab. Lub teeb qhov chaw yuav tsum tau ntsuas ua ib daim duab ntawm daim iav nrog lub qhov (pem hauv ntej lub teeb lub qhov) tom qab dhau los ntawm lub hom phiaj lens, ib feem ntawm cov hlaws dai ntawm daim iav thiab lub qhov muag, thiab tau txais los ntawm tib neeg lub qhov muag los tsom thiab saib xyuas. coincidence ntawm lub ntsej muag pom tseeb nrog daim iav nrog lub qhov; Lwm qhov ntawm lub teeb yog Tom qab dhau los ntawm qhov me me ntawm daim iav, nws mus txog V (λ) receiver los ntawm lub qhov muag qhov muag tom qab. Tus nqi brightness yog tso tawm los ntawm tus pointer lossis digital meter.
Luxmeter thiab Luminance Meter nta
Illuminometer
1. Kev faib tawm ntawm cov ntsuas hluav taws xob
Lub teeb pom kev pom teeb pom kev zoo: siv tsis yooj yim, tsis muaj tseeb, tsis tshua siv
Photoelectric illuminance meter: ntau selenium photocell illuminance meter thiab silicon photocell illuminance meter
2. Yuav tsum tau siv cov photocell illuminance meters
① Photovoltaic cells siv selenium (Se) photocells lossis silicon (Si) photocells nrog zoo linearity; lawv tuaj yeem muaj kev ruaj ntseg zoo tom qab ua haujlwm ntev thiab muaj kev nkag siab zoo; Thaum E yog siab, xaiv lub siab sab hauv photocells, uas muaj rhiab heev thiab zoo linearity, tsis yooj yim puas los ntawm lub teeb muaj zog.
② Muaj V (λ) kho lim sab hauv, uas tsim nyog rau lub teeb pom kev zoo nrog cov xim sib txawv, thiab qhov yuam kev me me
③Ntxiv lub cosine lub kaum sab xis compensator (opalescent iav los yog yas dawb) nyob rau hauv pem hauv ntej ntawm lub photocell vim hais tias thaum lub teeb meem lub kaum sab xis loj, lub photocell deviates los ntawm txoj cai cosine.
④ Lub ntsuas hluav taws xob yuav tsum ua haujlwm ntawm chav tsev kub lossis ze rau chav sov (photocell drift hloov nrog kub)
Brightness ntsuas
1. Txais kev tswj hwm microcomputer thiab ua cov ntaub ntawv.
2. Siv cov ntxaij lim dej cuam tshuam raws li cov ntsiab lus spectroscopic, thiab cov raj photoelectric rau kev hloov pauv photoelectric.
3. Muaj kev nyeem ntawv ncaj qha ntawm cov poov tshuaj thiab sodium concentration, nkhaus haum, rhiab heev drift, tsis siv neeg kho, thiab tsis siv neeg puv hloov. Kev ua haujlwm yuam kev tso saib, luam tawm cov txiaj ntsig thiab lwm yam haujlwm.
4. Zoo linear stability thiab reproducibility, tshwj xeeb tshaj yog haum rau kev kho mob daim ntawv thov.
