Txiav suab ntawm cov barcode. yuav pab tau ntaub ntawv

Qhov tsab xov xwm no yuav piav li cas seev suab bar code, los ntawm cov uas piv rau cov ntaubntawv povthawj ntawm cov ntaub ntawv.

Barcode hu ua kho ntaub ntawv nyeem los yog tshwj xeeb pab kiag li lawm. Nws yog siv rau cov pob, nws zoo li tus cwj nrag. Lub bar code yuav encode cov lus qhia txog ib co ntawm cov tseem ceeb tsis muaj cov khoom.

Cov feem ntau EAN (European coding system) thiab American Universal Khoom Code UPC.

Yuav ua li cas yog seev suab ib bar code? Ntxiv rau hais tias hauv qab no.

Tus qauv ntawm lub kho ntaub ntawv muaj xws li:

- lub teb chaws ntawm hauv paus chiv keeb code, feem ntau yog ob los yog peb tug lej tom qab;

- chaw tsim tshuaj paus lub code - ib tug plaub los yog tsib tug lej tom qab - nws tag nrho cov nyob rau qhov ntev ntawm lub teb chaws txoj cai;

- ntxiv tsib zauv - lub npe ntawm cov khoom, nws cov xim, qhov hnyav, loj, me, thiab cov neeg siv cov khoom;

- kawg yim xaus-npawb tsab - tus tswj, uas yog siv los xyuas cov correctness ntawm kev nyeem ntawv barcode scanner.

Tej zaum kuj muaj yog ib tug kos npe rau ntawm txoj cai ">", uas txhais tau tias qhov kev tso tawm ntawm cov khoom nyob rau hauv daim ntawv tso cai.

Txiav suab ntawm cov barcode muab ib tug ntau ntawm ntaub ntawv tseem ceeb hais txog qhov khoom.

Nyob rau hauv thiaj li yuav tau soj ntsuam xyuas qhov tseeb bar code los yog tsis, lub nram qab no suav yuav tsum tau pom zoo ua. Ntxiv tag nrho cov zauv uas muaj nyob rau ntawm txawm av. Ces muab lub resulting sum los ntawm peb. Txuag lub no, peb yuav hu nws "X".

Ntxiv daim ntau quav tso xov tooj (tab sis tsis muaj reference number) teem nyob rau hauv lub khib teb, qhov no sum yog ntxiv rau tus naj npawb "X" tau yav tas los. Ntawm tus nqi, uas muab tawm (peb hu nws «YZ»), raug tsuas mus Z. Tom ntej no, peb ua tau ib tug yooj yim txiav txim: 10- Z.

Yog hais tias lub xov tooj uas tau txais, tib yam li lub checksum uas muaj npe nyob rau hauv lub barcode, qhov khoom no puas tseeb. Yog hais tias nws tsis phim, ces cov khoom tau ua tsis tau raws li cov kev cai lij choj.

Txiav suab ntawm cov barcode yuav qhia cov lus qhia txog lub teb chaws nyob rau hauv uas cov khoom ua, qhia kom paub cov xov tooj ntawm lub tuam txhab, lub npe ntawm cov khoom.

Qhov no encoding ntaub ntawv no yog siv thoob plaws hauv lub ntiaj teb no. Yog li ntawd, xav txog lub hom barcodes.

Ib tug ntawm cov yooj yim barcode yog "2 of 5". Tej yam tshwm sim uas qhia cov zauv ntawm xoom cuaj, nyob rau hauv nws tus kheej muaj tsib kab, ob tug uas yog dav, thiab peb - nqaim.

Khoob ntawm tus cwj nrag uas yog tsis nqa tej ntaub ntawv thiab yog feem ntau cov kis dav sib npaug rau hauv lub dav ntawm ib tug nqaim bar. Qhov no code, nyob rau hauv tas li ntawd mus xaus-npawb tsab, muaj cim "pib" thiab "tsis txhob". Cia li peb tus cwj nrag siv nyob rau hauv lawv cov duab, ntawm uas ob yog sab. Qhov khoob ntawm cov ntaub ntawv tsis dais cov code "2 of 5" series ntawm discrete, li ntawd, ua rau nws yooj yim mus sau thiab txiav kuaj ib kev ua yuam kev.

Tam sim no, lub bar code ntawm cov khoom kuj yuav multi-kob.

Code "Codabar" yog ib tug discrete semielementnym barcode. Nws muaj cov xov tooj ntawm xoom cuaj, cov cim "-" thiab "+", "/", ":" 4 tug lej kawg "pib / nres" thiab cov duas kos npe rau ".". bar "Codabar" code nyob rau sab laug thiab txoj cai no xwb tej yam tshwm sim. Qhov kos npe rau zoo li ib tug plaub-mob stroke thiab peb qhov chaw.

Bar code "39" yog li lub npe vim ntawm cov qauv ntawm cov duab ntawm lub cim "3 thiab 9" yog sab qhov twg peb hais (ib kis thiab ob tug stroke) ntawm lub cuaj nqaim - lub lwm yam rau. Cov cai no yog txhim khu kev qha txaus, thiab yog dab tsi nws ua nws kom zoo dua. Tsis tas li ntawd, cov ntseeg ntawm xws li ib tug code yuav muab ntau zog los ntawm kev ntxiv ib tug tswj cim nyob rau hauv lub cim.

Barcode cov khoom no yog ib txoj kev uas cov ntaubntawv povthawj siv ntaub ntawv.

Ib tug tshwj xeeb qhov chaw ntawm cov ntau yam bar-coding system yuav siv sij hawm lub bar code "93". Nrog tib set ntawm cov ntaub ntawv tug lej tom qab raws li cov kev cai "39", nws yuav muab tau ib tug kev kub ceev cov duab ntawm cov cim. Plaub caug yim cim xwm nyob rau hauv lub "93" code. Nws muaj xws li tej yam tshwm sim "pib / nres" tswj kos npe rau plaub thiab plaub caug peb tug lej tom qab ntawm lub code "39".

Muaj peev xwm encode ib puas thiab nees nkaum-yim sib txawv cim txuam lub npe ntawm tus bar code "128". Lub code "128" - ib tug uncontrolled thiab tas mus li code. Nws tshwm sim muaj xws li peb tuav thiab peb qhov chaw, thiab txhua ntev yog kaum ib modules.

Peb tau pom tias ib co hom bar codes uas enjoyed thoob plaws hauv lub ntiaj teb no.