Nyob rau hauv xyoo tas los no, cov khw loj hauv tsev, cov khw muag khoom lag luam thiab lwm cov tuam txhab lag luam tau paub txog cov txiaj ntsig loj ntawm kev lag luamPOS systemrau kev lag luam kev tswj hwm kev lag luam, thiab tau tsim kev lag luam POS network system. Cov qauv tsim thiab kev teeb tsa ntawm lub network system tau nthuav dav hauv ntau cov ntawv xov xwm kev lag luam. Daim ntawv no tsuas yog tham txog yuav ua li cas xaiv ib qho ntawm cov lag luam barcode scanners raws li cov ntaub ntawv hauv ntej-kawg tau txais ib feem ntawm kev lag luam POS system.
Muaj peb hom kev lag luam barcode scanners: CCD barcode scanner, laser barcode scanner thiab kaum laser barcode scanner.
1. CCD barcode scannersiv lub hauv paus ntsiab lus ntawm photoelectric coupling (CCD) los tsim cov duab barcode luam ntawv, thiab tom qab ntawd txiav txim siab nws. Nws qhov zoo yog: tsis muaj ncej, lub cev muaj zog, lub neej ua haujlwm ntev. Tus nqi pheej yig.
Thaum xaiv ib qho CCD scanner, ob qhov tseem ceeb yog: Qhov tob ntawm daim teb :
Vim tias CCD lub ntsiab lus pom zoo ib yam li lub koob yees duab, yog tias koj xav kom qhov tob ntawm qhov chaw, qhov sib thooj nce lens, kom lub ntim CCD loj dhau, tsis yooj yim rau kev khiav lag luam. CCD zoo yuav tsum nyeem tau yam tsis tau ua raws li qhov bar code, nrog lub ntim nruab nrab thiab ua haujlwm zoo.
Kev daws teeb meem : Yog tias koj xav txhim kho qhov kev daws teeb meem ntawm CCD, koj yuav tsum nce chav tsev ntawm cov duab photosensitive ntawm daim duab. Tus nqi qis CCD feem ntau yog tsib pixels, nyeem EAN, UPC thiab lwm yam kev lag luam code txaus, rau lwm qhov kev lees paub yuav nyuaj. Qhov nruab nrab ntawm CCD yog ntau tshaj 1024 pixels, qee qhov txawm tias mus txog 2048pixe1, tuaj yeem paub qhov txawv ntawm qhov nqaim ntawm 0.1mm bar code.
2. Covlaser barcode scanneryog ib kab scanner siv ob lub laser raj ua lub teeb ci. Nws feem ntau muaj ob hom: daim iav teb thiab daim iav vibrato
Uas siv lub cev muaj zog ceev los tsav ib pab pawg prism tig, kom cov taw tes ib leeg laser tawm los ntawm ob lub raj ua ib txoj kab. Qhov no laser kab yog scanned rau lub bar code nws tus kheej. Barcode dub absorbs feem ntau ntawm cov laser, thiab dawb qhia txog feem ntau ntawm cov laser. Nyob rau tib lub sijhawm, lub teeb pom kev zoo yog cuam tshuam los ntawm lub lens optical nyob rau hauv 'lub cav', thiab tsom mus rau lub photoelectric peb-tube. Kev soj ntsuam nyob rau hauv lub sij hawm sau qhia tau hais tias lub photoelectric peb-tube theem qis ntawm bar code dub siv, thiab qib siab ntawm txoj siv dawb. Tom qab ob peb amplifications, lub duab plaub yog zoo li tus yoj, thiab cov duab plaub sib raug rau cov scanned bar code. Cov tau txais waveform yog kis mus rau lub decoder los ntawm cov ntaub ntawv kab. 'Decoder' tiag tiag yog ib qho chip microcomputer. Nws tsuas yog nyob ntawm kev cuam tshuam thiab ib qho nti txee los sau lub sijhawm dhia waveform. Cov array sau tau txiav txim siab nyob rau hauv lub scan tom ntej los yog rov qab scan. Nws tsuas yog nyob ntawm lub sijhawm piv ntawm cov txee no los txiav txim siab tus lej bar code. Hauv kev siv tswv yim, muaj ntau hom bar code, thiab cov khoom ntim tsis tu ncua xws li npuas nto, yog li qhov kev txiav txim siab xav tau qee qhov kev ua txhaum cai, tab sis tsis tuaj yeem tsim cov cai yuam kev. Tam sim no, tus decoder feem ntau muab faib ua 8 ntsis thiab 32 ntsis, 8 ntsis kom zoo dua yog tus nqi, 32 ntsis yog ceev. Lub laser bar code lag luam yog cluttered nrog zaj, tab sis kuj ua raws li cov ccd scanner plua plav, cov nqi tau pheej pheej yig, tsev, tab sis muaj ntau ntau haib domestic manufacturers, cov neeg siv yuav tsum tau ua tib zoo xav txog dab tsi hom, xaiv ntau haum.
Tus nqi ntawm daim iav trembling yog qis dua li ntawm daim iav rotating, tab sis lub hauv paus ntsiab lus ntawm rab phom laser tsis yooj yim los txhim kho qhov nrawm nrawm, feem ntau 33 zaug ib ob.
Thaum cov lag luam lag luam xaiv ib qho ntawm cov laser scanners, nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo saib xyuas qhov ceev thiab kev daws teeb meem, thiab qhov tob ntawm daim teb tsis yog qhov tseem ceeb. Vim tias thaum qhov tob ntawm qhov chaw nce, qhov kev daws teeb meem yuav txo qis heev. Ib tug zoo handheld laser scanner yuav tsum muaj siab scanning ceev thiab siab daws teeb meem nyob rau hauv ib tug taag qhov tob ntawm teb.
3. Lub kaum sab xis scanner yog abarcode scanneruas refracts lub laser emitted los ntawm lub laser diode los yog ntau scanning kab los ntawm lub optical system. Lub hom phiaj tseem ceeb yog kom txo qis kev ua haujlwm ntawm kev ua kom zoo ntawm bar code thaum tus neeg txais nyiaj nkag mus rau cov ntaub ntawv bar code. Ib qho kev xaiv yuav tsum tsom mus rau qhov chaw faib khoom ntawm kab scanning:
1.Muaj ntau cov kab sib txuas hauv ib qho kev taw qhia
2. Ntau kab scan hla ntawm ib qho chaw
3. Qhov kev txhais lus yuav tshwm sim ntawm txhua lub ntsiab lus zoo ib yam hauv ib qho chaw
Lub kaum sab xis scanner uas ua raws li peb lub ntsiab lus saum toj no yuav tsum yog ib qho ntawm cov ntawv thov kev lag luam xaiv.
Tiv tauj peb
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Post lub sij hawm: Nov-22-2022