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id="gmkqmgc" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/yiwanchuanbo/637435704643823307/599403.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="souiek4" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>紹興視頻監(jiān)控系統(tǒng)報價,cctv監(jiān)控系統(tǒng)</p><p><span>***更新：</span>2020-12-27 04:18:47</p><p><span id="click" >瀏覽次數(shù)：7次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="e2su22m" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海翊皖船舶設備有限公司</a></p><p><span>聯(lián)系人：</span>徐慶華</p><p><span>郵箱: </span>hc_automation@163.com</p><p><span>電話: </span>13917998260</p><p><span>傳真: </span>021_58461662</p><p><span>網(wǎng)址: </span>http://www.sh-yiwan.cn</p><p><span>手機: </span>021-58361662</p><p><span>地址: </span>中國(上海)自由貿(mào)易試驗區(qū)張楊路828-838號26樓</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="q224oko" class="page-proshow02"><p class="title">詳細說明</p><div id="ao2uy4c" class="box"><p><p style="text-indent:25px">高清網(wǎng)絡監(jiān)控系統(tǒng)如何選擇交換機：匯聚交換機：在匯聚層需要同時處理 170 只攝象機的 3‐4M 碼流（170* 4M=680M），也就意味著匯聚層交換機需要支持同時轉(zhuǎn)發(fā) 680M 以上的交換容量。一般存儲都接在匯聚上，所以視頻錄像是線速轉(zhuǎn)發(fā)。但要考慮到實時查看監(jiān)控的帶寬，每個連接占用 4M，一條 1000M 的鏈路可以支持 250 個攝像頭被調(diào)試調(diào)用。每臺接入交換機接 24 個攝像頭。250/24，相當于網(wǎng)絡可以承受每個攝像頭同時有 10 位用戶在實時查看的壓力。中心交換機：中心交換機，需要考慮交換容量以及到匯聚的鏈路帶寬，因為存儲是放置在匯聚層的，紹興視頻監(jiān)控系統(tǒng)報價，紹興視頻監(jiān)控系統(tǒng)報價，所以中心交換機沒有視頻錄像的壓力，即只要考慮同時多少人看多少路視頻，紹興視頻監(jiān)控系統(tǒng)報價。是簡化了的系統(tǒng)，攝像頭到交換機到錄像機。紹興視頻監(jiān)控系統(tǒng)報價</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興視頻監(jiān)控系統(tǒng)報價,cctv監(jiān)控系統(tǒng)" src="https://tyunfile.71360.com/UploadFile/yiwanchuanbo/637435704643823307/599403.png"></div><p style="text-indent:25px">高清網(wǎng)絡監(jiān)控系統(tǒng)如何選擇交換機：接入層交換機的選擇：條件 1、交換機的背板帶寬，如選擇 24 **換機，自帶二個 1000M 口，總共 26 口，則接入層的交換機背板帶寬要求為：(24*100M*2+1000*2*2)/1000=8.8Gbps 的背板帶寬。條件2、包轉(zhuǎn)發(fā)率：一個 1000M 口的包轉(zhuǎn)發(fā)率為 1.488Mpps/s, 則接入層的交換機交換速率為：(24*100M/1000M+2)*1.488=6.55Mpps/S 通常我們將滿足條件 1和 2的交換機稱之為線速交換機，如 H3C S1026T 就滿足線速交換能力，具有 24 個100M 端口，2 個 1000M 電口。根據(jù)以上條件得出：當有 20 路 720P 攝像機接入一個交換機是，此交換機必須具有 1個 1000M 上傳口，20 個以上的 100M 接入端口。溫州船用視頻監(jiān)控系統(tǒng)價格CCTV系統(tǒng)需要通過多優(yōu)先級限定管理人員和運營人員的工作權限，優(yōu)先級設置簡單，結構嚴密。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興視頻監(jiān)控系統(tǒng)報價,cctv監(jiān)控系統(tǒng)" src="https://tyunfile.71360.com/UploadFile/yiwanchuanbo/637435704616831100/5089513.png"></div><p style="text-indent:25px">多大的系統(tǒng)才需配用系統(tǒng)主機并沒有嚴格的限制。一般來說，當監(jiān)控系統(tǒng)中的較全攝像機數(shù)量達到3~4臺以上時，就可考慮使用小型系統(tǒng)主機。雖然用多臺單路控制器或一臺多路（如4路或6路）控制器也可以實現(xiàn)較全攝像機的控制，但這樣所需的控制線纜數(shù)量較多（每一路至少要一根10芯電纜），而且線纜的長度將過長（長線電阻造成的電壓降可能會導致云臺及電動鏡頭動作遲緩甚至不動作），整個系統(tǒng)也會顯得零亂。一般來說，使用系統(tǒng)主機會增加整個監(jiān)控系統(tǒng)的造價，這是因為系統(tǒng)主機的造價要比普通切換器高，而與之配套的前端解碼器的價格也比普通單路控制器高。但從布線考慮，各解碼器與系統(tǒng)主機之間是采用總線方式連接的，因此系統(tǒng)中線纜的數(shù)量不多（只需要一根兩芯通信電纜）。另外，集成式的系統(tǒng)主機大都有報警探測器接口，可以方便地將防盜報警系統(tǒng)與電視監(jiān)控系統(tǒng)整合于一體。當有探測器報警時，該主機還可自動地將主監(jiān)視器畫面切換到發(fā)生警情的現(xiàn)場攝像機所拍攝的畫面。圖1-5示出了采用系統(tǒng)主機的小型電視監(jiān)控系統(tǒng)的結構。</p><p style="text-indent:25px">CCTV監(jiān)控系統(tǒng)的原則：1、優(yōu)先性：監(jiān)控系統(tǒng)是在滿足可靠性和實用性的前提下盡可能優(yōu)先的系統(tǒng)。整個系統(tǒng)在建成后的十年內(nèi)保持優(yōu)先，系統(tǒng)所采用的設備與技術能適應以后發(fā)展，并能夠方便地升級。將成為一個優(yōu)先、適應未來發(fā)展、可靠性高、保密性好、網(wǎng)絡擴展簡便、連接數(shù)據(jù)處理能力強、系統(tǒng)運行操縱簡便的安防系統(tǒng)。2、實用性：視頻監(jiān)控系統(tǒng)具備完成工程中所要求功能的能力和水準。系統(tǒng)符合本工程實際需要的國內(nèi)外有關規(guī)范的要求，并且實現(xiàn)容易、操作方便。從用戶角度出發(fā)，充分利用現(xiàn)有資源，盡量降低系統(tǒng)成本，使系統(tǒng)具有較高的性能價格比。我們常用的交換機有百兆交換機、千兆交換機。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興視頻監(jiān)控系統(tǒng)報價,cctv監(jiān)控系統(tǒng)" src="https://tyunfile.71360.com/UploadFile/yiwanchuanbo/637435704606215910/5469375.png"></div><p style="text-indent:25px">CCTV監(jiān)控系統(tǒng)組成：硬盤錄像機。監(jiān)控系統(tǒng)中較常用的記錄設備是民用錄像機和長延時錄像機，因其操作簡單易學，錄像帶也容易保存和購買。與家用錄像機不同，延時錄像機可以長時間工作，可以錄制24小時（用普通VHS 錄像帶）甚至上百小時的圖像，可以聯(lián)接報警器材，收到報警信號自動啟動錄像，可以疊加時間日期，可以編制錄像機自動錄像程序，選擇錄像速度，錄像帶到頭后是自動停止還是倒帶重錄…… 延時錄像機的性能雖然出眾，但價格不菲，而且目前分辨率不是很高，在延時錄像時圖像也會丟失一部分，回放的圖像是一頓一頓跳躍的。利用特殊的錄像處理模式，可對圖像進行錄入、回放、處理等操作，使錄像效果達到較佳。紹興視頻監(jiān)控系統(tǒng)報價</p><p style="text-indent:25px">防塵罩的作用是用來保護攝像機和鏡頭不受諸如有害氣體、大灰塵及人為有意破壞等環(huán)境條件的影響。紹興視頻監(jiān)控系統(tǒng)報價</p><p style="text-indent:25px">CCTV系統(tǒng)的綜合防雷：監(jiān)控室內(nèi)應設置一等電位連接母線（或金屬板），該等電位連接母線應與建筑物防雷接地、PE線、設備保護地、防靜電地等連接到一起防止危險的電位差。各種電涌保護器（避雷器）的接地線應以較直和較短的距離與等電位連接母排進行電氣連接。由于有80％雷擊高電位是從電源線侵入的，為保證設備安全，一般電源上應設置三級避雷保護。在視頻傳輸線、信號控制線，入侵報警信號線進入前端設備之前或進入中心控制臺前應加裝相應的避雷保護器。良好的接地是防雷中至關重要的一環(huán)。接地電阻值越小過電壓值越低。監(jiān)控中心采用**接地裝置時，其接地電阻不得大于4Ω。采用綜合接地網(wǎng)時，其接地電阻不得大于1Ω。紹興視頻監(jiān)控系統(tǒng)報價</p><p style="text-indent:25px">上海翊皖船舶設備有限公司致力于機械及行業(yè)設備，以科技創(chuàng)新實現(xiàn)***管理的追求。公司自創(chuàng)立以來，投身于主機遙控修理，監(jiān)測報警系統(tǒng)修理，船舶電機維修，閥門遙控修理，是機械及行業(yè)設備的主力軍。上海翊皖始終以本分踏實的精神和必勝的信念，影響并帶動團隊取得成功。上海翊皖始終關注機械及行業(yè)設備行業(yè)。滿足市場需求，提高產(chǎn)品價值，是我們前行的力量。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2580611.html</p></div></div></div></div></div><div id="g20egko" class="page-right 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