Yintoni isithwebuli

ikhompyutha abaninzi izixhobo peripheral ezisetyenziswayo ngoku ekhaya, kude kube kutshanje ayikwazanga kufumaneka kuphela kwi-ofisi kweenkampani ezinkulu. Yiloo nto kanye eyenzeka isikeni computer. Abavelisi ngokukhawuleza waqonda ukuba le kwimarike niche ikhululekile, yaye bakwazi ukuqalisa ukuvelisa isixhobo mali eklasini, apho imisebenzi ukwanelisa ngokupheleleyo iimfuno zomsebenzisi we computeryomndilili ekhaya.

Nangona kwiivenkile zobugcisa computer zinika uluhlu olubanzi ezi zixhobo, ngokufuthi kwi undwendwe, nanku umbuzo, yintoni na vuavanyisi. Oku Kuyinto eqhelekileyo, ngenxa yokuba ekufuneni ulwazi ngokwendalo. Namhlanje sijonga into isithwebuli kanti noko ukujonga xa uthenga.

Scanner - esi sixhobo opto-mechanical lokuguqula ulwazi umfanekiso ibe uhlobo yedijithali, nto leyo ukusebenza inkqubo yekhompyutha. Nantsi ke ingcaciso elula. Nakuba kunjalo, ukwenzela ukuba ukuqonda ngokupheleleyo oko vuavanyisi, kufuneka ufundisise isakhiwo yayo yangaphakathi. Oku kuya kwandisa kuphela isiseko solwazi, kodwa ikuvumela ukuba ukhethe imodeli isifanelayo.

Iyonke yokusebenza isikeni mgaqo ilula: le into iske ukwalathisa umtha wokukhanya yaye inxalenye ziboniswe izinto svetoregistriruyuschie. Ngenxa kumanqanaba ahlukeneyo bokubonisa (umzekelo, umbala omnyama ibonakalisa ngaphezu abamhlophe) unit logic ivelisa i "ushicilelo" yedijithali yento scan. Le ukucaciswa ikuvumela ngokubanzi ukuphendula umbuzo wokuba yintoni na isithwebuli, kuba ukukrwaqula, kuvela, unako nokuba izinto ezinkulu, hayi nje kuphela umbhalo ephepheni, njengoko abaninzi bekholelwa. Kodwa, nangoko, isixhobo kuyaqondakala ngokubanzi ezizodwa kakhulu yenzelwe ukusebenza kunye itekisi kunye nemizobo. Nangona umgaqo efanayo yokusebenza, kukho iindidi ezahlukeneyo yabavavanyi.

Imifanekiso isiphelo ephantsi-zizixhobo tablet. Kuzo noxwebhu lwephepha isale iinkcukacha lomzobo obekwe kwi window ngaphaya (iglasi, iplastiki) kunye nefowuni licinezelwe nxamnye isiciko phezulu ngaphaya kwawo. Okulandelayo ukuze sheet ekhokelwa umqadi ukukhanya kunye ziboniswe kuthinjwa. Eyona elementi vuavanyisi - matrix. Kukho iintlobo ezimbini kuyo: ico kunye CCD. Kwimeko isizalo lohlobo yokuqala phantsi iglasi, nto leyo ibekwa kwimakhishithi, buyo i-LED multi-ngendledlana kunye photocells. Uthi chu ezinambuzelayo sheet, kubandakanywa ii-LED Tyhila umgca obomvu, oluhlaza, imibala eluhlaza (eziyimfuneko ukuze kwakhiwe umfanekiso umbala).

imifuziselo ezinjalo iindleko eliphantsi kunye nokuthembeka superior (ikhefu nto) ingaba abathengi inzala ngoko noloqoqosho efuna isisombululo ukuba ukuskena ngamaphepha umbhalo emhlophe. Ngoko ke khumbula ukuba isantya ukuskena kade, ufuna nokubotshwa olwandeleyo kwiphepha ukuya kwiglasi, imifanekiso umgangatho laliphakathi nje.

Xa onobuhle CCD ilight matrix azikho kwi wenqwelwana, yaye isibane ukhanyiso. Ukukhanya esibonisiweyo eqokelelwe ngenkqubo yezibuko ugxininisa, ukufumana umfanekiso umbala wohlulwe amacandelo spectrum ifakwe kunye photocells. Esi sisombululo ukuba ukufumana imifanekiso eziqaqambileyo uvakale kwi imveliso gama ngokuqinileyo qhiwu iglasi, ayifuneki, ekubeni ukukhanya wanele ukoyisa umgama omfutshane. Isantya Iqhubekekisa nayo inyukile kakhulu. Sinokuthi namhlanje isisombululo kuhle. Esi sithintelo na isithintelo yobomi isibane (ngexesha kuya kufuneka ukutshintsha, njengoko ephikisana ilight-esikhupha) kunye imfuneko unikezelo amandla angaphandle.

Yabavavanyi ebonakala kubunzulu eveliswa sisixhobo (ngokufanayo 24, 32, 48 amasuntswana) kunye nesisombululo. On the amasuntswana umbala kufuneka nje ukuhamba lwemifanekiso, kodwa nesandi isizalo ngokwayo, ngoko ke kulapho ngcono. Kwelinye icala, ukuba ingabi indlu ukugxotha amalulwane - umshicileli ukuba ovelisa umfanekiso ovavanyiweyo ayikho ngokwasemzimbeni nako ukubonisa 48-bit. Sigqibo acaciswe XXX: bhaza, apho «XXX» - amachaphaza, yaye «bhaza» - amanyathelo buyo.