Illuminance meter ntsuas cov qauv, hom thiab calibration
Lub teeb meter ntsuas txoj cai:
Photocells yog optoelectronic Cheebtsam uas hloov lub teeb lub zog ncaj qha mus rau hauv hluav taws xob zog. Thaum lub teeb tawm tsam ntawm cov selenium photovoltaic cell, qhov teeb meem teeb hla dhau ntawm cov yeeb yaj kiab hlau 4 thiab mus txog qhov sib cuam tshuam ntawm cov semiconductor selenium txheej 2 thiab cov yeeb yaj kiab hlau 4, ua rau cov nyhuv photoelectric ntawm lub interface. Qhov loj ntawm lub peev xwm sib txawv generated muaj ib tug proportional kev sib raug zoo nrog lub illumination ntawm lub teeb-tau txais nto ntawm lub photovoltaic cell. Lub sijhawm no, yog tias ib qho kev sib txuas sab nraud txuas nrog, tam sim no yuav ntws los ntawm, thiab tus nqi tam sim no yuav qhia rau ntawm microammeter nrog lux (Lx) raws li qhov ntsuas. Qhov luaj li cas ntawm photocurrent nyob ntawm qhov kev siv ntawm qhov teeb meem teeb meem thiab qhov tsis kam ntawm lub voj. Lub illuminance meter muaj lub iav hloov khoom siv, yog li nws tuaj yeem ntsuas ob qhov siab thiab qis illuminance. Hom illuminance meters: 1. Visual illuminance meter: tsis yooj yim siv, tsis tshua muaj neeg, tsis tshua siv 2. Photoelectric illuminance meter: feem ntau siv selenium photovoltaic cell illuminance meter thiab silicon photovoltaic cell illuminance meter
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 photovoltaic illuminance meter thiab silicon photovoltaic illuminance meter
Muaj pes tsawg leeg thiab kev siv yuav tsum tau ntawm photocell illuminance meter:
1. Composition: microammeter, hloov pob qhov rooj, xoom taw tes hloov kho, davhlau ya nyob twg, photocell, V (λ) kho lim, thiab lwm yam.
Feem ntau siv selenium (Se) photovoltaic hlwb los yog silicon (Si) photovoltaic hlwb illuminance meters, los yog lux meters
2. Cov kev cai siv:
① Photovoltaic hlwb yuav tsum siv selenium (Se) photovoltaic hlwb los yog silicon (Si) photovoltaic hlwb nrog linearity zoo; lawv muaj peev xwm tswj tau zoo stability rau lub sij hawm ntev thiab muaj siab rhiab heev; Thaum E yog siab, siv cov cell photovoltaic nrog siab sab hauv tsis kam, uas muaj tsawg rhiab heev thiab zoo linearity. , tsis yooj yim puas los ntawm lub teeb pom kev zoo
② Muaj V (λ) kho lim sab hauv, uas yog tsim rau illumination ntawm lub teeb qhov chaw nrog txawv xim kub thiab muaj me me yuam kev.
③Ntxiv lub cosine lub kaum sab xis compensator (opalescent iav los yog yas dawb) nyob rau hauv pem hauv ntej ntawm lub photovoltaic cell. Yog vim li cas yog tias thaum lub kaum sab xis tshwm sim loj, lub cell photovoltaic 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)
Calibration txoj cai:
Cia Ls teeb lub photocell vertically → E=I/r2. Los ntawm kev hloov r, tus nqi photocurrent nyob rau hauv txawv illumination tuaj yeem tau txais. Qhov ntsuas tam sim no tau hloov mus rau hauv qhov ntsuas qhov pom kev raws li kev sib raug zoo ntawm E thiab i.
Txoj kev Calibration:
Siv lub teeb siv hluav taws xob siv hluav taws xob hloov qhov kev ncua deb l ntawm lub xov tooj ntawm tes photovoltaic thiab tus qauv teeb ntawm qhov kwv yees ua haujlwm nyob deb ntawm qhov chaw teeb pom kev zoo, sau cov ntawv nyeem ntawm ammeter ntawm txhua qhov kev ncua deb, thiab suav cov illuminance E raws li qhov rov qab square. Txoj cai nyob deb E=I/r2, raws li Qhov no tuaj yeem tau txais cov txiaj ntsig photocurrent i nrog cov teeb pom kev sib txawv, thiab kos qhov hloov pauv ntawm photocurrent i thiab illuminance E, uas yog qhov ntsuas qhov nkhaus ntawm lub ntsuas hluav taws xob. Los ntawm qhov no, lub dial ntawm lub illuminance meter tuaj yeem muab qhab nia, uas yog calibration nkhaus ntawm lub illuminance meter.
Cov yam ntxwv cuam tshuam rau calibration nkhaus:
Photocells thiab galvanometers yuav tsum tau recalibrated thaum hloov; lub illuminance meter yuav tsum tau recalibrated tom qab siv rau ib lub sij hawm ntawm lub sij hawm (feem ntau nws yuav tsum tau calibrated 1-2 zaug ib xyoos); high-precision illuminance meters yuav calibrated nrog lub teeb siv tus qauv teeb; nthuav Cov calibration ntau yam ntawm lub illuminance meter yuav hloov qhov kev ncua deb r, los yog txawv standard teeb yuav siv tau, thiab ib tug me me-ntau galvanometer yuav siv tau.
