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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="mvpwtf2" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974442758542_nhsdo_4663619.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="hqfxzqi" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>河北省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>采購(gòu)4G-DTU外殼,4G-DTU外殼</p><p><span>***更新：</span>2020-07-24 18:02:56</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3xzr887" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">滄州萬(wàn)瑞電子機(jī)箱有限公司</a></p><p><span>聯(lián)系人：</span>李文超</p><p><span>郵箱: </span>2816163037@qq.com</p><p><span>電話(huà): </span>19103271861</p><p><span>傳真: </span>0317_4371300</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0317-4371300</p><p><span>地址: </span>河北省滄州市青縣農(nóng)場(chǎng)四分場(chǎng)</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="73nk8p4" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="7gn7rta" class="box"><p><p style="text-indent:25px">支撐主動(dòng)心跳，堅(jiān)持長(zhǎng)久在線(xiàn) GPRS通訊網(wǎng)絡(luò)的利益之一就是支撐GPRS終端設(shè)備長(zhǎng)久在線(xiàn)，因而典型的GPRS DTU在規(guī)劃上都支撐長(zhǎng)久在線(xiàn)功用，這就要求DTU包含了上電主動(dòng)撥號(hào)、選用心跳包堅(jiān)持長(zhǎng)久在線(xiàn)(當(dāng)長(zhǎng)期沒(méi)有數(shù)據(jù)通訊時(shí)，移動(dòng)網(wǎng)關(guān)將斷開(kāi)DTU與中心的聯(lián)接，心跳包就是DTU與數(shù)據(jù)中心在聯(lián)接被斷開(kāi)之前發(fā)送一個(gè)小數(shù)據(jù)包，以堅(jiān)持聯(lián)接不被斷開(kāi))、支撐斷線(xiàn)主動(dòng)重連、主動(dòng)重?fù)芴?hào)等特色。 4)支撐參數(shù)裝備，采購(gòu)4G-DTU外殼，長(zhǎng)久保存 GPRS DTU作為一種通訊設(shè)備，其運(yùn)用場(chǎng)合非常廣（guang）泛。在不同的運(yùn)用中，數(shù)據(jù)中心的IP地址及端口號(hào)，采購(gòu)4G-DTU外殼，串口的波特率等都是不同的。因而，GPRS DTU都應(yīng)支撐參數(shù)裝備，并且將裝備好的參數(shù)保存內(nèi)部的長(zhǎng)久存儲(chǔ)器件內(nèi)(一般為FLASH或EEPROM等)，采購(gòu)4G-DTU外殼。一旦上電，就主動(dòng)按照設(shè)置好的參數(shù)進(jìn)行作業(yè)。采購(gòu)4G-DTU外殼</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="采購(gòu)4G-DTU外殼,4G-DTU外殼" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974442758542_nhsdo_4663619.jpg"></div><p style="text-indent:25px">支撐用戶(hù)串口參數(shù)設(shè)置不同用戶(hù)設(shè)備的串口參數(shù)有所不同，DTU聯(lián)接用戶(hù)設(shè)備的串口時(shí)，要根據(jù)用戶(hù)設(shè)備串口的實(shí)踐參數(shù)對(duì)DTU端進(jìn)行相應(yīng)設(shè)置，確保用戶(hù)設(shè)備的正常通訊和牢靠數(shù)據(jù)傳輸。 GPRS DTU上電后，首先讀出內(nèi)部FLASH中保存的作業(yè)參數(shù)(包含GPRS撥號(hào)參數(shù)，串口波特率，數(shù)據(jù)中心IP地址等等，事前現(xiàn)已裝備好)。 GPRS DTU登陸GSM網(wǎng)絡(luò)，然后進(jìn)行GPRS PPP撥號(hào)。撥號(hào)成功后，GPRS DTU將獲得一個(gè)由移動(dòng)隨機(jī)分配的內(nèi)部IP地址(一般是10.X.X.X)。也就是說(shuō)，GPRS DTU處于移動(dòng)內(nèi)網(wǎng)中，并且其內(nèi)網(wǎng)IP地址通常是不固定的，隨著每次撥號(hào)而改變。咱們能夠理解為GPRS DTU這時(shí)是一個(gè)移動(dòng)內(nèi)部局域網(wǎng)內(nèi)的設(shè)備，經(jīng)過(guò)移動(dòng)網(wǎng)關(guān)來(lái)實(shí)現(xiàn)與外部Internet公網(wǎng)的通訊。這與局域網(wǎng)內(nèi)的電腦經(jīng)過(guò)網(wǎng)關(guān)訪問(wèn)外部網(wǎng)絡(luò)的辦法類(lèi)似。采購(gòu)4G-DTU外殼</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="采購(gòu)4G-DTU外殼,4G-DTU外殼" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974441352355_nhsdo_2640995.jpg"></div><p style="text-indent:25px">關(guān)于DTU來(lái)說(shuō)，只需樹(shù)立了與數(shù)據(jù)中心的雙向通訊，完結(jié)用戶(hù)串口數(shù)據(jù)與GPRS網(wǎng)絡(luò)數(shù)據(jù)包的轉(zhuǎn)換就相對(duì)簡(jiǎn)單了。一旦接收到用戶(hù)的串口數(shù)據(jù)，DTU就當(dāng)即把串口數(shù)據(jù)封裝在一個(gè)TCP/UDP包里，發(fā)送給數(shù)據(jù)中心。反之，當(dāng)DTU收到數(shù)據(jù)中心發(fā)來(lái)的TCP/UDP包時(shí)，從中取出數(shù)據(jù)內(nèi)容，當(dāng)即經(jīng)過(guò)串口發(fā)送給用戶(hù)設(shè)備。經(jīng)過(guò)有線(xiàn)的數(shù)據(jù)收集中心，一起與許多個(gè)GPRS DTU進(jìn)行雙向通訊。這是現(xiàn)在GPRS DTU運(yùn)用體系中**為常用的辦法。運(yùn)用領(lǐng)域 DTU的主要功能是把遠(yuǎn)端設(shè)備的數(shù)據(jù)經(jīng)過(guò)無(wú)線(xiàn)的辦法傳送回后臺(tái)中心。如右圖所示，要完結(jié)數(shù)據(jù)的傳輸需求樹(shù)立一套完好的數(shù)據(jù)傳輸體系。在這個(gè)體系中包含:DTU，客戶(hù)設(shè)備、移動(dòng)網(wǎng)絡(luò)、后臺(tái)中心。在前端，DTU和客戶(hù)的設(shè)備經(jīng)過(guò)232或許485接口相連。DTU上電運(yùn)轉(zhuǎn)后先注冊(cè)到移動(dòng)的GPRS網(wǎng)絡(luò)，然后去和設(shè)置在DTU中的后臺(tái)中心樹(shù)立SOCKET銜接。后臺(tái)中心作為SOCKET的服務(wù)端，DTU是SOCKET銜接的客戶(hù)端。</p><p style="text-indent:25px">CPU:工業(yè)級(jí)高性能ARM9嵌入式處理器，帶內(nèi)存辦理MMU,200MPS, 16KB Dcache,16KB Icache FLASH:8MB，可擴(kuò)充到32MB SDRAM:64MB，可擴(kuò)充到256MB 接口: UART: CM 3160P: 1個(gè)RS232串口串口速率: 110bps ~ 230400bps 數(shù)據(jù)位支撐: 8位或 7位奇偶校驗(yàn)位: 無(wú) 或奇數(shù)校驗(yàn)或偶數(shù)校驗(yàn) 停止位: 1位或 2位流控: 無(wú) 或 RTS/CTS CM 3160EP: 1個(gè)RS485接口(根據(jù)需求，可硬件跳線(xiàn)支撐RS232/422/TTL) 串口速率: 110bps ~ 230400bps 數(shù)據(jù)位支撐: 8位或 7位奇偶校驗(yàn)位: 無(wú) 或奇數(shù)校驗(yàn)或偶數(shù)校驗(yàn) 停止位: 1位或 2位流控: 無(wú) 或 RTS/CTS </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="采購(gòu)4G-DTU外殼,4G-DTU外殼" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974438696224_nhsdo_5700680.jpg"></div><p style="text-indent:25px">因而只有DTU是不能完結(jié)數(shù)據(jù)的無(wú)線(xiàn)傳輸?shù)?，還需求有后臺(tái)軟件的配合一起運(yùn)用。在樹(shù)立銜接后，前端的設(shè)備和后臺(tái)的中心就能夠經(jīng)過(guò)DTU進(jìn)行無(wú)線(xiàn)數(shù)據(jù)傳輸了，并且是雙向的傳輸。 DTU現(xiàn)已廣（guang）泛運(yùn)用于電力、環(huán)保、LED信息發(fā)布、物流、水文、氣候等職業(yè)領(lǐng)域。如上圖所示，雖然運(yùn)用的職業(yè)不同，但運(yùn)用的原理是相同的。大都是DTU和職業(yè)設(shè)備相連，比方PLC，單片機(jī)等主動(dòng)化產(chǎn)品的銜接，然后和后臺(tái)樹(shù)立無(wú)線(xiàn)的通訊銜接。在互聯(lián)網(wǎng)日益發(fā)展的今（jin）天，DTU的運(yùn)用也越來(lái)越廣（guang）泛。它為各職業(yè)以及各職業(yè)之間的信息、工業(yè)融合供給了協(xié)助。 4G-DTU外殼廠家</p><p style="text-indent:25px">采購(gòu)4G-DTU外殼</p><p style="text-indent:25px">GPRS DTU主動(dòng)主張與數(shù)據(jù)中心的通訊銜接，并堅(jiān)持通訊銜接一直存在。由于GPRS DTU處于移動(dòng)內(nèi)網(wǎng)，并且IP地址不固定。因而，只能由GPRS DTU主動(dòng)銜接數(shù)據(jù)中心，而不能由數(shù)據(jù)中心主動(dòng)銜接GPRS DTU。這就要求數(shù)據(jù)中心具有固定的公網(wǎng)IP地址或固定的域名。數(shù)據(jù)中心的公網(wǎng)IP地址或固定的域名作為參數(shù)存儲(chǔ)在GPRS DTU內(nèi)，以便GPRS DTU一旦上電撥號(hào)成功，就能夠主動(dòng)銜接到數(shù)據(jù)中心。詳細(xì)地講，GPRS DTU經(jīng)過(guò)數(shù)據(jù)中心的IP地址(假如是選用中心域名的話(huà)，先經(jīng)過(guò)中心域名解析出中心IP地址)以及端口號(hào)等參數(shù)，向數(shù)據(jù)中心主張TCP或UDP通訊懇求。在得到中心的響應(yīng)后，GPRS DTU即認(rèn)為與中心握手成功，然后就堅(jiān)持這個(gè)通訊銜接一直存在，假如通訊銜接中止，GPRS DTU將當(dāng)即從頭與中心握手。由于TCP/UDP通訊銜接現(xiàn)已樹(shù)立，就能夠進(jìn)行數(shù)據(jù)雙向通訊了。采購(gòu)4G-DTU外殼</p><p style="text-indent:25px">滄州萬(wàn)瑞電子機(jī)箱有限公司是一家電子機(jī)箱、機(jī)柜、面板、模具、五金配件制造、加工:機(jī) 箱、機(jī)柜的整機(jī)組裝;配電箱、配電柜、電氣成套設(shè)備、機(jī) 械設(shè)備配件制造、加工(不含噴涂和表面化學(xué)處理) (依法須經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)) 的公司，致力于成為客戶(hù)業(yè)務(wù)創(chuàng)新、機(jī)械及行業(yè)設(shè)備可信賴(lài)的合作伙伴。萬(wàn)瑞電子機(jī)箱供應(yīng)作為電子機(jī)箱、機(jī)柜、面板、模具、五金配件制造、加工:機(jī) 箱、機(jī)柜的整機(jī)組裝;配電箱、配電柜、電氣成套設(shè)備、機(jī) 械設(shè)備配件制造、加工(不含噴涂和表面化學(xué)處理) (依法須經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)) 的品牌企業(yè)，為客戶(hù)提供質(zhì)量的[ "鈑金設(shè)備外殼加工", "機(jī)箱機(jī)柜加工定做", "儀器儀表外殼", "配電箱加工" ]。公司擁有多年的行業(yè)經(jīng)驗(yàn)，每年以銷(xiāo)售收入達(dá)到50-100萬(wàn)元，如果您想了解更多產(chǎn)品信息，請(qǐng)通過(guò)頁(yè)面上的電話(huà)聯(lián)系我們。萬(wàn)瑞電子機(jī)箱供應(yīng)始終關(guān)注機(jī)械及行業(yè)設(shè)備行業(yè)。海納百川，有容乃大，國(guó)內(nèi)外同行的智慧都是促使我們前行的力量。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/697791.html</p></div></div></div></div></div><div id="zhr8lip" class="page-right twoColRt"><div id="k2umoar" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8ipmoah" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 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