Kev ntsuas lub hauv paus ntsiab lus thiab cov kev xav tau ntawm illuminance meter
1. Kev ntsuas txoj cai
Lub cell photovoltaic yog ib qho 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.
2. Yuav tsum tau siv:
Kev sojntsuam ntawm lub ntsuas hluav taws xob yog ua los ntawm iav, uas yooj yim tawg thiab puas. Nyob rau tib lub sijhawm, cov nyhuv dej tsis zoo yog qhov tsis zoo thaum siv.
① Photocells yuav tsum siv selenium (Se) photocells lossis silicon (Si) photocells nrog zoo linearity; lawv tseem muaj peev xwm tswj tau zoo stability thiab siab rhiab heev tom qab ua hauj lwm ntev; Thaum E yog siab, xaiv photocells nrog siab sab hauv tsis kam, uas muaj tsawg rhiab heev thiab zoo linearity, tsis yooj yim puas los ntawm lub teeb muaj zog.
② Muaj V (λ) kho lim sab hauv, uas yog tsim 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 hloov)
