一、條碼讀取器是什么
條碼是一種用線條和線條之間的間隔按照一定的規則表示數據的條形符號,條碼讀取器指的是用來讀取條碼信息的設備。
條碼讀取器的的使(shi)用在現在市面上(shang)非常(chang)多(duo),它能集成條碼讀取和(he)信息處理(li)。能夠(gou)滿足各(ge)行各(ge)業(ye)企業(ye)內部數據采集處理(li)等需(xu)求。完(wan)成數據一體(ti)化(hua)管(guan)理(li),為企業(ye)的數字化(hua)轉型奠定基礎。
二、條碼讀取器原理介紹
前文已經(jing)簡單了解(jie)了碼讀(du)(du)取(qu)器是(shi)什么,那(nei)么它是(shi)怎么讀(du)(du)取(qu)條碼的呢?一(yi)起來看(kan)看(kan)條碼讀(du)(du)取(qu)器原理(li)介(jie)紹(shao)吧!
它使用一(yi)個光(guang)(guang)(guang)學裝置(zhi)將(jiang)條(tiao)(tiao)(tiao)碼(ma)(ma)的(de)(de)(de)(de)(de)(de)條(tiao)(tiao)(tiao)空(kong)(kong)信(xin)(xin)(xin)息轉(zhuan)(zhuan)換(huan)(huan)(huan)成(cheng)電(dian)(dian)(dian)(dian)子信(xin)(xin)(xin)息,再由(you)專用譯碼(ma)(ma)器(qi)翻譯成(cheng)相(xiang)應(ying)的(de)(de)(de)(de)(de)(de)數據信(xin)(xin)(xin)息。由(you)于不(bu)(bu)同(tong)(tong)顏色的(de)(de)(de)(de)(de)(de)物體,其反射(she)(she)的(de)(de)(de)(de)(de)(de)可(ke)見光(guang)(guang)(guang)的(de)(de)(de)(de)(de)(de)波長(chang)不(bu)(bu)同(tong)(tong),白色物體能(neng)反射(she)(she)各種波長(chang)的(de)(de)(de)(de)(de)(de)可(ke)見光(guang)(guang)(guang),黑色物體則(ze)吸收各種波長(chang)的(de)(de)(de)(de)(de)(de)可(ke)見光(guang)(guang)(guang),所以當條(tiao)(tiao)(tiao)碼(ma)(ma)掃描器(qi)光(guang)(guang)(guang)源發出的(de)(de)(de)(de)(de)(de)光(guang)(guang)(guang)經光(guang)(guang)(guang)闌及凸透鏡1后,照(zhao)射(she)(she)到黑白相(xiang)間的(de)(de)(de)(de)(de)(de)條(tiao)(tiao)(tiao)碼(ma)(ma)上(shang)時,反射(she)(she)光(guang)(guang)(guang)經凸透鏡2聚(ju)焦后,照(zhao)射(she)(she)到光(guang)(guang)(guang)電(dian)(dian)(dian)(dian)轉(zhuan)(zhuan)換(huan)(huan)(huan)器(qi)上(shang),于是光(guang)(guang)(guang)電(dian)(dian)(dian)(dian)轉(zhuan)(zhuan)換(huan)(huan)(huan)器(qi)接(jie)收到與(yu)(yu)白條(tiao)(tiao)(tiao)和(he)黑條(tiao)(tiao)(tiao)相(xiang)應(ying)的(de)(de)(de)(de)(de)(de)強弱不(bu)(bu)同(tong)(tong)的(de)(de)(de)(de)(de)(de)反射(she)(she)光(guang)(guang)(guang)信(xin)(xin)(xin)號(hao),并轉(zhuan)(zhuan)換(huan)(huan)(huan)成(cheng)相(xiang)應(ying)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)輸出到放(fang)(fang)大(da)整形電(dian)(dian)(dian)(dian)路(lu)。白條(tiao)(tiao)(tiao)、黑條(tiao)(tiao)(tiao)的(de)(de)(de)(de)(de)(de)寬度不(bu)(bu)同(tong)(tong),相(xiang)應(ying)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)持續時間長(chang)短也(ye)不(bu)(bu)同(tong)(tong)。但是,由(you)光(guang)(guang)(guang)電(dian)(dian)(dian)(dian)轉(zhuan)(zhuan)換(huan)(huan)(huan)器(qi)輸出的(de)(de)(de)(de)(de)(de)與(yu)(yu)條(tiao)(tiao)(tiao)碼(ma)(ma)的(de)(de)(de)(de)(de)(de)條(tiao)(tiao)(tiao)和(he)空(kong)(kong)相(xiang)應(ying)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)一(yi)般僅10mV左右(you),不(bu)(bu)能(neng)直接(jie)使用,因而先要(yao)將(jiang)光(guang)(guang)(guang)電(dian)(dian)(dian)(dian)轉(zhuan)(zhuan)換(huan)(huan)(huan)器(qi)輸出的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)送放(fang)(fang)大(da)器(qi)放(fang)(fang)大(da)。放(fang)(fang)大(da)后的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)仍(reng)然是一(yi)個模擬電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao),為(wei)了避免由(you)條(tiao)(tiao)(tiao)碼(ma)(ma)中的(de)(de)(de)(de)(de)(de)疵點(dian)和(he)污點(dian)導致(zhi)錯(cuo)誤信(xin)(xin)(xin)號(hao),在(zai)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)路(lu)后需加一(yi)整形電(dian)(dian)(dian)(dian)路(lu),把模擬信(xin)(xin)(xin)號(hao)轉(zhuan)(zhuan)換(huan)(huan)(huan)成(cheng)數字(zi)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao),以便(bian)計算機系統能(neng)準確(que)判讀。
整形(xing)電(dian)路(lu)的(de)(de)脈(mo)沖(chong)數字(zi)(zi)信(xin)(xin)號(hao)經(jing)譯碼(ma)器譯成數字(zi)(zi)、字(zi)(zi)符信(xin)(xin)息。它通過識(shi)別起始、終(zhong)止(zhi)字(zi)(zi)符來判別出條碼(ma)符號(hao)的(de)(de)碼(ma)制及(ji)掃描(miao)方(fang)向;通過測(ce)量脈(mo)沖(chong)數字(zi)(zi)電(dian)信(xin)(xin)號(hao)0、1的(de)(de)數目來判別出條和(he)空(kong)的(de)(de)數目。通過測(ce)量0、1信(xin)(xin)號(hao)持續的(de)(de)時間(jian)來判別條和(he)空(kong)的(de)(de)寬(kuan)度。這(zhe)樣(yang)便(bian)得(de)到了被辯讀的(de)(de)條碼(ma)符號(hao)的(de)(de)條和(he)空(kong)的(de)(de)數目及(ji)相(xiang)應(ying)的(de)(de)寬(kuan)度和(he)所(suo)用碼(ma)制,根據(ju)碼(ma)制所(suo)對應(ying)的(de)(de)編碼(ma)規(gui)則,便(bian)可(ke)將(jiang)條形(xing)符號(hao)換成相(xiang)應(ying)的(de)(de)數字(zi)(zi)、字(zi)(zi)符信(xin)(xin)息,通過接口電(dian)路(lu)送給計算機(ji)系統進(jin)行數據(ju)處理(li)與管(guan)理(li),便(bian)完成了條碼(ma)辨讀的(de)(de)全過程(cheng)。