Iskena sekhowudi yebha sisixhobo esisetyenziswa kwiinkqubo zePOS zorhwebo.Kukho iindidi ezimbini eziphambili, enye kukusetyenziswa kweetrayisi eziqhelekileyo kunye neeskena zorhwebo.URhwebo lwahlulwe ubukhulu becala: Iskena seCCD, iskena esiphathwa ngesandla selaser kunye ne-angle-angle laser scanner ezintathu.
Iskena seCCD
Iskena seCCD sisebenzisa umthetho-siseko woqhagamshelo lombane (CCD) ukwenza umfanekiso webhakhowudi eprintiweyo ipateni kwaye emva koko uyisuse.Izibonelelo zayo zezi:
Akukho shaft, motor, ubomi benkonzo ende;
ubuncinci.
Xa ukhetha iskena seCCD, iiparamitha ezimbini zibaluleke kakhulu:
Ubunzulu bebala
Ngenxa yokuba umgaqo wokucinga we-CCD ufana nekhamera, ukuba ufuna ukwandisa ubunzulu bebala, kufuneka ngokuhambelanayo wandise i-lens, eyenza i-CCD ibe nkulu kakhulu kwaye iphazamise ukusebenza.I-CCD egqwesileyo inokufundwa ngaphandle kokunamathela kwikhowudi yebha, kwaye umthamo uphakathi kwaye umsebenzi ukhululekile.
amandla okusombulula
Ukuba sifuna ukuphucula isisombululo seCCD, kufuneka sandise iyunithi yecandelo le-photosensitive element kwindawo yokucinga.I-CCD enexabiso eliphantsi ngokuqhelekileyo yi-pixel ye-5-port.Kwanele ukufunda i-EAN, i-UPC kunye nezinye iikhowudi zorhwebo, kodwa kuya kuba nzima ukufunda ezinye iikhowudi.I-CCD ephakathi ubukhulu becala yi-1024pixel, kwaye abanye bade bafikelele kwi-2048pixel, ekwazi ukwahlula ikhowudi yebha kunye neyona nto incinci yeyunithi ye-0.1mm.