Dab tsi ntawm barcode scanner nyeem?
Dab tsi ntawm barcode scanner nyeem?

Video: Dab tsi ntawm barcode scanner nyeem?

Video: Dab tsi ntawm barcode scanner nyeem?
Video: Leng Yang - Yog Vim Dab Tsi (Official Full Song | Nkauj Tawm Tshiab) 2020/05/24 2024, Kaum ib hlis
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A barcode scanner feem ntau muaj peb qhov sib txawv ntu nrog rau lub teeb pom kev zoo, thesensor, thiab lub decoder. Feem ntau, a barcode scanner "scans" cov ntsiab lus dub thiab dawb ntawm a barcode los ntawm illuminating lub chaws nrog lub teeb liab, uas yog hloov dua siab tshiab rau hauv cov ntawv txuam.

Tom qab ntawd, nyeem barcode li cas?

A barcode nyeem ntawv (los yog barcode scanner) isan optical scanner uas tuaj yeem nyeem luam tawm barcodes , txiav txim siab cov ntaub ntawv muaj nyob rau hauv lub barcode thiab xa cov ntaub ntawv mus rau lub computer. Zoo li lub scanner flatbed, nws muaj lub teeb pom kev zoo, lub lens thiab lub teeb sensor txhais lus rau optical impulsesin rau hluav taws xob teeb liab.

Ib yam li ntawd, cov ntaub ntawv dab tsi tuav barcode? A barcode pom ntawm ib qho khoom noj khoom haus yuav muaj cov ntaub ntawv sib txawv dua ib barcode ntawm koj daim ntawv tsav tsheb piv txwv. Khoom noj khoom haus cov ntaub ntawv barcode feem ntau muaj cov lus piav qhia luv luv ntawm cov khoom lag luam uas tau hais txog kev teeb tsa hauv ntau lub tshuab hluav taws xob siv hluav taws xob.

Tib neeg kuj nug, lub tshuab luam ntawv barcode puas nyeem cov kab dub lossis dawb?

Lub hom laser barcode scanner nyeem cov lis dej num byreflecting lub teeb los ntawm dub thiab kab dawb ntawm a barcode thiab vim lub laser yog ib leeg kab nws tsuas nyeem horizontally hla lub barcode . Los ntawm 2D barcodes cov ntaub ntawv raug teeb tsa vertically thiab horizontally nkaus xwb imager ua tau kom txiav txim siab tag nrho cov ntaub ntawv.

Cov scanners luam theej duab cov kab dub?

Hauv kev muaj tiag, cov tshuab luam ntawv tsis txhob ntes zeros thiab onesand tsim binary tooj raws li lawv cov zis: lawv ntes sequencesof dub thiab dawb kab txaij , raws li peb tau qhia ntawm no, tab sis hloov lawv ncaj qha mus rau hauv tus lej lej, muab tus lej lej lej ua lawv cov zis.

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