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數(shù)采行業(yè)因為受到了GPRS、GSM等業(yè)務(wù)的影響，正出現(xiàn)一次比較大的變革，特別是在遠距離方面，傳統(tǒng)的MODEM、RTU方式正受到很大的沖擊，在我們經(jīng)手的很多環(huán)境監(jiān)控、管道監(jiān)控、路燈節(jié)能、水文監(jiān)控方面很少有客戶能經(jīng)受GPRS DTU的誘惑。DTU的基于網(wǎng)絡(luò)和透明通信方式深受大家的喜愛，只是目前DTU的價格相對而言還是比較高，如果能掉到GSM MODEM的價格就比較合適了。除此之外移動對于數(shù)據(jù)業(yè)務(wù)的支持還是不夠，早期還可以用神州行卡，現(xiàn)在已全部關(guān)閉了，只能用全球通，而全球通每月50元的月租實在讓人很惱火，一個城市的路燈節(jié)能控制器如果全部上GPRS，假設(shè)有1000個點，那么每個月就需要5萬元的開支，還不包括流量的收費，對于公共事業(yè)這還算好，對于工廠或者電梯的監(jiān)控就很難受了。
   無論如何GPRS DTU是一個方向，單節(jié)點月費用不超過二十元，單節(jié)點價格低于400元時將是其大行其市的日子。
   2、未來的控制系統(tǒng)
   前面講了這么多歷史，下面看看我心目中的未來控制器。
   經(jīng)過FCS和現(xiàn)場總線的浪潮后，各大公司好像都累了，這幾年大家都在底頭為下一代的控制器做各種研發(fā)和準備（包括理論和實踐），在這個過程中，我們與東芝、AB、思博等公司進行了比較深入的合作和交流同時也有了一些自己的想法：聯(lián)系人：小費
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TELEMECANIQUE SQUARE D ALTIVAR 16 400/460V 3HP 2.2kW AC

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SANKYO SANDEX ECO SERIES INDEXING DRIVE 4.5ED-03337R-L3

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GH INDUCTION TYPE TC150/2 INDUCTION HEATING CONTROL BOX

GATES 330FT 1/4" 300 PSI FLAME RESISIANT HOSE

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SEW EURODRIVE KAF67DT80N8/4BMG05HRTF 108.03:1 RATIO GEA

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ALLEN BRADLEY 700DC-PT400Z24 TIME RELAY

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