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隨著條碼(ma)技術(shu)日(ri)益(yi)發(fa)展成(cheng)熟,物流條形碼(ma)的(de)應用(yong)也(ye)越來越廣泛,物流企業(ye)紛(fen)紛(fen)采(cai)購(gou)數(shu)據(ju)采(cai)集(ji)(ji)器(qi)/盤點(dian)機終(zhong)端來管理(li),使物流系統順利運作(zuo)。目前國內(nei)市場(chang)上的(de)數(shu)據(ju)采(cai)集(ji)(ji)器(qi)有(you)幾(ji)十種品牌(pai)(pai),每種品牌(pai)(pai)又有(you)幾(ji)是種產(chan)品型(xing)號(hao),每個型(xing)號(hao)具有(you)不(bu)同的(de)性能、規格(ge)、價(jia)(jia)格(ge),采(cai)購(gou)者(zhe)往往會感(gan)到迷惑,不(bu)知究竟買那(nei)一款為好。比如(ru),同樣采(cai)用(yong)64位CPU的(de)數(shu)據(ju)采(cai)集(ji)(ji)器(qi),如(ru)果性能、碼(ma)制兼容(rong)性相(xiang)當(dang),內(nei)存、顯示、掃描槍等配置相(xiang)仿,在技術(shu)支(zhi)持和服務相(xiang)差不(bu)大的(de)時候,那(nei)么(me)對大多數(shu)用(yong)戶(hu)來說有(you)幾(ji)千元(yuan)就可購(gou)買的(de)價(jia)(jia)格(ge)為什(shen)么(me)還要花上萬元(yuan)呢。
選(xuan)擇購買數據采集器的十(shi)大(da)原(yuan)則:
一、適用(yong)范圍(wei)
用(yong)戶根據(ju)自身(shen)的(de)(de)(de)不同情況,應當(dang)選擇不同的(de)(de)(de)便(bian)攜式(shi)數據(ju)采(cai)(cai)集(ji)器(qi)。如(ru)果(guo)用(yong)戶在比較(jiao)(jiao)大型的(de)(de)(de)、立體式(shi)倉庫應用(yong)便(bian)攜式(shi)數據(ju)采(cai)(cai)集(ji)器(qi),由于(yu)有些物品的(de)(de)(de)存放位置較(jiao)(jiao)高,離(li)操(cao)(cao)作人員較(jiao)(jiao)遠(yuan),我們(men)就應當(dang)選擇掃(sao)描(miao)景深大,讀取距離(li)遠(yuan)且(qie)首讀率較(jiao)(jiao)高的(de)(de)(de)采(cai)(cai)集(ji)器(qi)。而對(dui)于(yu)中小(xiao)型倉庫的(de)(de)(de)使用(yong)者,在此方面的(de)(de)(de)要(yao)求(qiu)并不是(shi)(shi)很高,可以選擇一些功(gong)能(neng)齊(qi)備、便(bian)于(yu)操(cao)(cao)作的(de)(de)(de)采(cai)(cai)集(ji)器(qi)。對(dui)于(yu)用(yong)戶選購便(bian)攜式(shi)數據(ju)采(cai)(cai)集(ji)器(qi)來說,選擇時*重(zhong)要(yao)的(de)(de)(de)一點是(shi)(shi)“夠用(yong)”,即購買適用(yong)于(yu)本身(shen)需要(yao)的(de)(de)(de),而不要(yao)盲目購買價格貴、功(gong)能(neng)很強(qiang)的(de)(de)(de)采(cai)(cai)集(ji)系(xi)統。
二、譯碼范圍
譯碼(ma)(ma)(ma)范(fan)圍(wei)是選擇(ze)數(shu)(shu)據(ju)采(cai)(cai)(cai)集(ji)(ji)(ji)(ji)器(qi)(qi)的(de)(de)(de)(de)一(yi)(yi)個重要(yao)(yao)指(zhi)標(biao)。各(ge)種數(shu)(shu)據(ju)采(cai)(cai)(cai)集(ji)(ji)(ji)(ji)器(qi)(qi)采(cai)(cai)(cai)用(yong)(yong)(yong)的(de)(de)(de)(de)條(tiao)碼(ma)(ma)(ma)掃描部件不(bu)同,細節參數(shu)(shu)也可能不(bu)同,比如可識讀(du)條(tiao)碼(ma)(ma)(ma),一(yi)(yi)般來說,數(shu)(shu)據(ju)采(cai)(cai)(cai)集(ji)(ji)(ji)(ji)器(qi)(qi)可識讀(du)常見的(de)(de)(de)(de)一(yi)(yi)維(wei)條(tiao)碼(ma)(ma)(ma),如EAN8,EAN13,ISBN,CODE39,CODE93,ITF,CODE128,CODABAR等(deng)等(deng),對(dui)用(yong)(yong)(yong)戶(hu)來說足夠了,但如果用(yong)(yong)(yong)戶(hu)要(yao)(yao)讀(du)取特殊的(de)(de)(de)(de)一(yi)(yi)維(wei)條(tiao)碼(ma)(ma)(ma)或(huo)二維(wei)條(tiao)碼(ma)(ma)(ma),就(jiu)要(yao)(yao)仔細看是否數(shu)(shu)據(ju)采(cai)(cai)(cai)集(ji)(ji)(ji)(ji)器(qi)(qi)能否識讀(du)這些條(tiao)碼(ma)(ma)(ma)了。另(ling)外(wai)如果用(yong)(yong)(yong)戶(hu)要(yao)(yao)遠距(ju)離(li)掃描條(tiao)碼(ma)(ma)(ma),即使數(shu)(shu)據(ju)采(cai)(cai)(cai)集(ji)(ji)(ji)(ji)器(qi)(qi)使用(yong)(yong)(yong)的(de)(de)(de)(de)是激(ji)光掃描技(ji)術,也要(yao)(yao)看數(shu)(shu)據(ju)采(cai)(cai)(cai)集(ji)(ji)(ji)(ji)器(qi)(qi)掃描的(de)(de)(de)(de)景深(shen)夠不(bu)夠。因此,用(yong)(yong)(yong)戶(hu)在(zai)購買(mai)時要(yao)(yao)充分(fen)考慮到自己實際(ji)應(ying)用(yong)(yong)(yong)中的(de)(de)(de)(de)編(bian)碼(ma)(ma)(ma)范(fan)圍(wei),來選取合適的(de)(de)(de)(de)采(cai)(cai)(cai)集(ji)(ji)(ji)(ji)器(qi)(qi)。
三、數據通訊接口
采集器的接口能(neng)力(li)是評價其(qi)功能(neng)的又(you)一個重(zhong)要(yao)指標,也是選(xuan)擇采集器時重(zhong)點考(kao)慮的內容(rong)。用(yong)戶在購(gou)買時要(yao)首先明確(que)自己原系統的操作(zuo)環境(jing)、接口方式等情況,再選(xuan)擇適應該操作(zuo)環境(jing)和接口方式的便攜式數據采集器。數據采集器的通訊(xun)接口通常采用(yong)如下幾種技術:RS232、USB、BLUETOOTH、IrDA、WIFI,以(yi)下分(fen)別(bie)描述其(qi)用(yong)途。
RS232和USB主要(yao)用(yong)(yong)于與(yu)PC通(tong)訊、上傳下載(zai)數據,RS232也(ye)可以用(yong)(yong)于驅(qu)動便攜式微型打印機(ji),但是(shi)筆者(zhe)不建議這樣使用(yong)(yong),因為太麻煩。
IrDA、Bluetooth可(ke)用于(yu)與(yu)PC通訊,也(ye)可(ke)以用于(yu)驅動(dong)便攜式微(wei)型打印機,Bluetooth還可(ke)以用于(yu)組建局域網。
WIFI可用于組建局域網。
除(chu)了(le)RS232是(shi)大部分(fen)數據(ju)(ju)(ju)采集(ji)器(qi)(qi)都(dou)帶(dai)(dai)的(de)通訊接(jie)(jie)口外,其(qi)他(ta)的(de)接(jie)(jie)口各種(zhong)數據(ju)(ju)(ju)采集(ji)器(qi)(qi)都(dou)只帶(dai)(dai)其(qi)中的(de)一種(zhong)或兩種(zhong),然而(er)數據(ju)(ju)(ju)接(jie)(jie)口對于用(yong)戶來說是(shi)擴(kuo)展應用(yong)的(de)重要組成(cheng)部分(fen),筆者的(de)建議是(shi)在選擇(ze)數據(ju)(ju)(ju)采集(ji)器(qi)(qi)時,除(chu)了(le)要能滿足現有需求,*好根據(ju)(ju)(ju)實際情況選擇(ze)帶(dai)(dai)更多數據(ju)(ju)(ju)接(jie)(jie)口的(de)數據(ju)(ju)(ju)采集(ji)器(qi)(qi),以便今后擴(kuo)展功能。
四、對首(shou)讀率的要求(qiu)
首(shou)讀率(lv)(lv)是數(shu)據采(cai)集器(qi)的(de)(de)(de)(de)一個綜合性(xing)指標,它與條(tiao)碼(ma)符(fu)(fu)號(hao)的(de)(de)(de)(de)印刷質(zhi)量(liang)(liang)、譯碼(ma)器(qi)的(de)(de)(de)(de)設計和掃描槍的(de)(de)(de)(de)性(xing)能(neng)均有一定關系(xi)(xi)。首(shou)讀率(lv)(lv)越(yue)高(gao),越(yue)節省工作時(shi)間,但相應(ying)的(de)(de)(de)(de),其(qi)價格也必(bi)然高(gao)出其(qi)它便(bian)攜式數(shu)據采(cai)集器(qi)。在(zai)物(wu)品(pin)的(de)(de)(de)(de)庫存(cun)(盤點)過(guo)程(cheng)中(zhong),可以(yi)(yi)通(tong)過(guo)人工來控制條(tiao)碼(ma)符(fu)(fu)號(hao)用(yong)便(bian)攜式數(shu)據采(cai)集器(qi)重復掃描,因此(ci),對首(shou)讀率(lv)(lv)的(de)(de)(de)(de)要(yao)求并不嚴格它只是工作效率(lv)(lv)的(de)(de)(de)(de)量(liang)(liang)度而已。但在(zai)自動分撿系(xi)(xi)統中(zhong),對首(shou)讀率(lv)(lv)的(de)(de)(de)(de)要(yao)求就很高(gao)。當然,便(bian)攜式數(shu)據采(cai)集器(qi)的(de)(de)(de)(de)首(shou)讀率(lv)(lv)越(yue)高(gao),必(bi)然導致它的(de)(de)(de)(de)誤碼(ma)率(lv)(lv)提高(gao),所以(yi)(yi)用(yong)戶在(zai)選擇采(cai)集器(qi)時(shi)要(yao)根(gen)據自己的(de)(de)(de)(de)實際情(qing)況(kuang)和經濟能(neng)力來購買(mai)符(fu)(fu)合系(xi)(xi)統需(xu)求的(de)(de)(de)(de)采(cai)集器(qi),在(zai)首(shou)讀率(lv)(lv)和誤碼(ma)率(lv)(lv)兩者間進行平衡。
五、數據采集器價格(ge)
購買(mai)采(cai)集(ji)器(qi)(qi)時(shi)(shi),其價格也是應(ying)(ying)關(guan)心的(de)一(yi)個問題。各種品牌的(de)各種功能的(de)數據采(cai)集(ji)器(qi)(qi)由(you)于其配置不同、功能不同,價格也會產(chan)生很大差異。因此在(zai)購買(mai)采(cai)集(ji)器(qi)(qi)終(zhong)端時(shi)(shi)要(yao)注意產(chan)品的(de)性(xing)能價格比,以(yi)滿足應(ying)(ying)用系統要(yao)求(qiu)且價格較低者(zhe)為選(xuan)購對象,真(zhen)正做到(dao)“物美價廉”。
六、條碼掃描
作為數(shu)據采(cai)集器(qi)的核心部件,條碼掃(sao)描模塊的性能(neng)是影響用戶使(shi)用的關鍵性因素。目前數(shu)據采(cai)集器(qi)采(cai)用的掃(sao)描技(ji)術(shu)有如下幾(ji)種(zhong)Laser(激光),線性CCD/CMOS,面陣(zhen)CCD/CMOS,以下是幾(ji)種(zhong)掃(sao)描技(ji)術(shu)的對(dui)比:
LASER(激光) 線性CCD/CMOS 面陣(zhen)CCD/CMOS
可識讀條碼 一維 一維 一維、二維
識讀(du)速度 較(jiao)快 較(jiao)快 較(jiao)慢
景深 大 較(jiao)小(xiao) 小(xiao)
價格 較(jiao)貴(gui) 便(bian)宜 貴(gui)
七、電池
都是(shi)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de),通(tong)(tong)常使(shi)(shi)用(yong)(yong)專(zhuan)(zhuan)用(yong)(yong)鋰(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)、專(zhuan)(zhuan)用(yong)(yong)鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi),通(tong)(tong)用(yong)(yong)鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)和(he)通(tong)(tong)用(yong)(yong)堿性電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi),如果是(shi)使(shi)(shi)用(yong)(yong)專(zhuan)(zhuan)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi),一定(ding)要(yao)考慮(lv)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)容(rong)量(liang)(liang)(liang)(liang)是(shi)否(fou)滿足用(yong)(yong)戶的(de)(de)使(shi)(shi)用(yong)(yong)要(yao)求,頻繁(fan)地充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)對(dui)于(yu)(yu)移動應(ying)用(yong)(yong)來說(shuo)是(shi)不(bu)現實的(de)(de),如果使(shi)(shi)用(yong)(yong)可以(yi)通(tong)(tong)用(yong)(yong)的(de)(de)鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)和(he)堿性電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi),那么用(yong)(yong)戶要(yao)根據實際情(qing)況來決定(ding)使(shi)(shi)用(yong)(yong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)型號。對(dui)于(yu)(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)容(rong)量(liang)(liang)(liang)(liang)要(yao)特別(bie)對(dui)用(yong)(yong)戶說(shuo)明(ming)的(de)(de)是(shi),只(zhi)有模(mo)擬實際使(shi)(shi)用(yong)(yong)才(cai)能(neng)(neng)分(fen)辨(bian)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)(liang)(liang)(liang)是(shi)否(fou)可以(yi)滿足要(yao)求,另外要(yao)注(zhu)(zhu)意在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)整個使(shi)(shi)用(yong)(yong)壽命范圍(wei)內,電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)容(rong)量(liang)(liang)(liang)(liang)會隨著使(shi)(shi)用(yong)(yong)次數(shu)的(de)(de)增加(jia)而減少(shao)(shao),當容(rong)量(liang)(liang)(liang)(liang)減少(shao)(shao)為(wei)標稱容(rong)量(liang)(liang)(liang)(liang)的(de)(de)60%時(shi),電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)壽命才(cai)算結束,所以(yi)在測試過程(cheng)中要(yao)充分(fen)考慮(lv)到這(zhe)個問(wen)題(ti),對(dui)于(yu)(yu)數(shu)據采集器規格(ge)書中所注(zhu)(zhu)明(ming)的(de)(de)充滿一次電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)掃描多少(shao)(shao)次,使(shi)(shi)用(yong)(yong)多長(chang)時(shi)間這(zhe)些(xie)參(can)數(shu),用(yong)(yong)戶只(zhi)能(neng)(neng)當作參(can)考,只(zhi)有經過充分(fen)測試才(cai)能(neng)(neng)確定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)(liang)(liang)(liang)是(shi)否(fou)夠用(yong)(yong)。
八、數(shu)據存儲空間大小
數據采(cai)集器大都需要在機內(nei)用FLASH ROM存儲數據,FLASH
ROM的大小也是(shi)用戶必(bi)須考慮(lv)的,不(bu)考慮(lv)價(jia)格的話,FLASH
ROM的(de)(de)(de)大小是(shi)越(yue)大越(yue)好,但考慮(lv)價格的(de)(de)(de)話,不必一味求大,在選擇數據(ju)采集器之前,*好根據(ju)實際情況計算一下數據(ju)量的(de)(de)(de)大小,然后留出適當的(de)(de)(de)余(yu)量。另外用戶要(yao)注意(yi)(yi)的(de)(de)(de)是(shi),數據(ju)采集上的(de)(de)(de)標(biao)明的(de)(de)(de)FLASH ROM的(de)(de)(de)大小要(yao)注意(yi)(yi)其(qi)單位(wei),單位(wei)Bits只有(you)(you)Bytes的(de)(de)(de)1/8,而(er)且并(bing)不是(shi)所有(you)(you)的(de)(de)(de)FLASH ROM的(de)(de)(de)空間都(dou)可以(yi)存(cun)儲數據(ju),其(qi)中還有(you)(you)一部分是(shi)用于存(cun)放(fang)應(ying)用程序的(de)(de)(de)。
九、顯示屏
數據采(cai)集器的(de)(de)(de)(de)(de)顯示屏(ping)一般都(dou)是黑白(bai)的(de)(de)(de)(de)(de)LCD屏(ping),很(hen)少用(yong)彩屏(ping)的(de)(de)(de)(de)(de),筆(bi)者認為對用(yong)戶(hu)而言,屏(ping)幕(mu)是否為彩色(se)并不重(zhong)要,而屏(ping)幕(mu)的(de)(de)(de)(de)(de)大小(xiao)才(cai)是用(yong)戶(hu)需要重(zhong)點考慮的(de)(de)(de)(de)(de),屏(ping)幕(mu)的(de)(de)(de)(de)(de)點陣數直接決(jue)定(ding)了用(yong)戶(hu)界面的(de)(de)(de)(de)(de)友好程度,建議用(yong)戶(hu)盡量選擇點陣數多的(de)(de)(de)(de)(de)顯示屏(ping)。
十、開發是否方便
數據(ju)采(cai)集器并不是(shi)(shi)可以(yi)直接使用(yong)的(de)產品,而是(shi)(shi)要(yao)裝載應用(yong)程序后才能使用(yong)的(de),這些應用(yong)程序需要(yao)系統(tong)集成商或廠(chang)商開發根據(ju)用(yong)戶的(de)需求開發,如果廠(chang)商提供了良好的(de)開發環境、足夠的(de)API和例(li)程,開發方便(bian),那么可以(yi)節省大量的(de)開發時間,便(bian)于(yu)項目快速實(shi)施(shi)。
其他、抗震性能
因為數據(ju)采(cai)(cai)(cai)集器使用的環境(jing)不(bu)是辦公(gong)室,而是倉庫(ku)或戶(hu)外(wai),并且是手持設(she)備,所(suo)以相對而言(yan)容易從手中掉(diao)下(xia)來。為防(fang)止(zhi)(zhi)跌落(luo),目前很(hen)多數據(ju)采(cai)(cai)(cai)集器都有(you)防(fang)震設(she)計,防(fang)止(zhi)(zhi)跌落(luo)至地面后(hou)損壞(huai)數據(ju)采(cai)(cai)(cai)集器,這些(xie)是PDA無法做到的。建議用戶(hu)選擇防(fang)震性(xing)能(neng)好的數據(ju)采(cai)(cai)(cai)集器。