Kev taw qhia thiab kev ua haujlwm ntawm illuminance meter
1. Illuminance meter:
Illuminance meter (los yog lux meter) yog ib qho kev ntsuas tshwj xeeb ntawm luminosity, brightness instrumentation. Nws muaj cov tswv tsev thiab lub teeb pom kev, qhov ntsuas ntau yog (0-50000) lux, qhov nruab nrab sab hauv lub teeb yog (100-1000) lux, sab nraum zoov hnub ci illumination yog kwv yees li 50000lux. lux yog ib chav tsev ntawm illumination, qhia qhov ceev ntawm lub teeb irradiation 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.
Yog qhov degree uas cov khoom yog illuminated, uas yog, qhov saum npoo ntawm cov khoom tau txais los ntawm luminous flux thiab qhov piv ntawm thaj chaw illuminated. Illuminance meter feem ntau yog tsim los ntawm selenium photocell lossis silicon photocell thiab microampere meter.
2. Kev ntsuas txoj cai:
Photocell 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 raug coj mus rau saum npoo ntawm selenium photovoltaic cell, qhov teeb meem teeb dhau los ntawm cov yeeb yaj kiab hlau 4 kom ncav cuag qhov demarcation ntawm cov semiconductor selenium txheej 2 thiab cov yeeb yaj kiab hlau 4, thiab ua rau cov nyhuv photoelectric ntawm lub interface. Qhov loj ntawm cov photogenerated tam sim no muaj ib qho proportionality rau lub illumination ntawm lub teeb-tau txais nto ntawm lub photocell. Hauv qhov no, yog tias ib qho kev sib txuas sab nraud txuas nrog, qhov tam sim no dhau mus, thiab tus nqi ntawm qhov tam sim no qhia los ntawm microampere meter kawm tiav hauv lux (Lx). Qhov loj ntawm photocurrent nyob ntawm qhov siv ntawm qhov teeb meem teeb. Lub illuminance meter muaj ib tug hloov mechanism kom nws yuav ntsuas tau siab illuminance thiab tsawg illuminance.
Cite hom illuminance meter: 1. pom illuminance meter: siv tsis yooj yim, siab precision, tsis tshua siv 2. photoelectric illuminance meter: feem ntau siv selenium photoelectric cell illuminance meter thiab silicon photoelectric cell illuminance meter.
