Yuav ua li cas barcode scanner ua haujlwm

Cov qauv ntawm lub tshuab luam ntawv barcode feem ntau yog raws li hauv qab no: lub teeb qhov chaw, tau txais cov cuab yeej, photoelectric hloov dua siab tshiab tivthaiv, kev txiav txim siab Circuit Court, thiab lub computer interface.

Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm barcode scanner yog: lub teeb tawm los ntawm lub teeb ci ci rau ntawm lub cim barcode los ntawm lub tshuab kho qhov muag, thiab lub teeb pom kev zoo yog pom ntawm lub photoelectric converter los ntawm kev kho qhov muag los tsim cov teeb liab hluav taws xob, uas yog generated. Tom qab lub teeb liab yog amplified los ntawm Circuit Court Ib tug analog voltage, uas yog proportional rau lub teeb nyob rau hauv lub teeb pom kev ntawm bar code cim, thiab ces lim thiab zoo li tus tsim ib square yoj teeb liab sib haum mus rau lub analog teeb liab, uas yog txhais los ntawm lub decoder raws li ib tug cov teeb liab digital uas tuaj yeem lees txais ncaj qha los ntawm lub computer.

Common flat-panel barcode scanners feem ntau muaj lub teeb ci, lub lens optical, scanning module, analog - mus rau - digital converter circuit, thiab cov ntaub ntawv yas. Nws siv cov khoom siv hluav taws xob los hloov cov teeb liab teeb pom kev zoo rau hauv cov teeb liab hluav taws xob, thiab tom qab ntawd cov teeb liab hluav taws xob tau hloov mus rau hauv cov teeb liab digital los ntawm analog - rau - digital converter thiab xa mus rau lub computer rau kev ua haujlwm. . Thaum luam theej duab duab, tom qab lub teeb ci ci rau ntawm daim duab, lub teeb pom kev zoo dhau los ntawm lub lens thiab sib sau ua ke ntawm lub scanning module. Lub scanning module hloov lub teeb teeb liab mus rau hauv ib qho analog digital teeb liab (uas yog, qhov hluav taws xob, uas yog qhov kev siv ntawm lub teeb tau txais (Relevant), thiab taw qhia seb cov duab dim li cas. Lub sijhawm no, cov analog {{5} Cov kev hloov pauv digital hloov pauv cov analog voltage rau hauv cov teeb liab digital thiab xa mus rau lub khoos phis tawj, cov xim yog quantized siv 8, 10, thiab 12 khoom ntawm peb xim RGB, thiab cov teeb liab tau ua tiav rau hauv cov duab tso zis saum toj no. -hais txog tus naj npawb ntawm cov khoom. Yog tias muaj cov lej ntau dua, nws txhais tau tias cov duab tuaj yeem muaj qib ntau dua thiab qhov tob, tab sis cov xim ntau tshaj qhov kev lees paub ntawm tib neeg lub qhov muag, yog li nyob rau hauv qhov kev daws teeb meem, rau peb, siab dua - lej barcode scanning Cov nyhuv ntawm lub scanner scanning yog du xim sib txuas, thiab koj tuaj yeem pom cov ntsiab lus ntxiv ntawm daim duab.