【正文】 ； ? 信息層 將控制系統(tǒng)的各種數(shù)據(jù)加工后傳至上級(jí)管理網(wǎng)絡(luò)（ TCP/IP 以太網(wǎng)），以便實(shí)現(xiàn)管控一體化 。 是指采用 CSMA/CD 的網(wǎng)絡(luò)，而以太網(wǎng)的標(biāo)準(zhǔn)由 DIX EtherV2 定義，在不嚴(yán)格的情況下，可以稱之為 局域網(wǎng)，也就是以太網(wǎng)。隨著網(wǎng)絡(luò)負(fù)載的加大，碰撞的機(jī)會(huì)會(huì)增加，網(wǎng)絡(luò)效率明顯下降。 (8) 線路采用變壓器雙端隔離或光纖，抗干擾性強(qiáng)。兩個(gè)工作群組要分割原有網(wǎng)絡(luò)寬帶（ 100M），一個(gè)工作群組工作時(shí)，另一個(gè)群組必須等待，這樣不僅具有延時(shí)，而且這種延時(shí)是不確定的。目前 10Gbps 的以太網(wǎng)已經(jīng)商業(yè)化，數(shù)據(jù)傳輸時(shí)間大大縮短，響應(yīng)時(shí)間得到提高，系統(tǒng)的實(shí)時(shí)性及不可確定性得到了改善。例如，國外不少國家核加速器最新測(cè)控方案選擇了以太網(wǎng)，除此之外汽車裝 6 配線、薄鋼生產(chǎn)線等均采用工業(yè)以太網(wǎng)的方案，從測(cè)控領(lǐng)域的發(fā)展方向上看，工業(yè)以太網(wǎng)將是未來測(cè)控領(lǐng)域中的一個(gè)重要發(fā)展方向，也是企業(yè)管控一體化和智能建筑系統(tǒng)集成的一種最佳方案。前一種方式目的是讓不該得到的得不到，后一種方式讓不該得到的得到了也不知道。 ENC 工業(yè)以太網(wǎng)控制系統(tǒng)結(jié)構(gòu)框如圖 6 所示。 ② 硬件結(jié)構(gòu)：由中央處理器 MCU、以太網(wǎng)網(wǎng)卡、傳感器、執(zhí) 行器、 I/O 接口以及存儲(chǔ)器（電子硬盤），電源組成 。建筑中有了眾多設(shè)備提供的優(yōu)秀服務(wù)，智能建筑就成了一套智能服務(wù)系統(tǒng)集合，這正是人們所期待的。 ② Intelligent Building of the urban information system integration, the development of digital, intelligent building (including intelligent residential district), has bee a digital city39。 18 ? switch VLAN technology monly used to exchange control system can be allocated to the proprietary information, access and bandwidth, thus ensuring the work39。 ? 10/100baset the IEEE standard Ether interfaces. ② Hardware architecture: from the central processing unit MCU, Ether cards, sensors, actuators, I / O interfaces, and memory (edrive), power ponents. ③ System architecture: embedded WEB SEVER, with the client (Browser) munication, as shown in Figure 8. (3) ENC System features ① Information work to achieve reunification and control work Cancellation control work and information work boundaries and control information. ENC all equipment parameters through integrated module or integrated directly into the Ether interface on, ENC parameter control module is a web server, embedded WEB server. ② a work management control services Central control centre is a main server to control the parameters of integrated modules can be centralized or distributed processing of data through the parameters of various types of integrated modules plete control requirements. ③ System is simple, convenient and flexible work, expansion of maintenancefriendly The system via Ether integrated, intelligent building LAN is indispensable, these modules can use LAN nearest wall, do not have to rewiring, the required devices are standardized, convenient and flexible work, expansion of maintenancefriendly. ④ Control system will be upgraded to the service system The system runs through the concept of a service, the equipment will be upgraded to control external equipment to provide information services. This could be the target of human services, but also for the machines. With the construction of large equipment to provide excellent services, intelligent building will bee a collection of intelligent service system, which is expected by the people. 22 23 7 Conclusions Since the 1990s, industrial Ether control work to replace a try, there are many successful cases. Industrial Ether as the core to the monitoring and control technologies in the field of monitoring is an important development direction, but in fact when, reliability, security, interoperability and other needs further study and improve. 。 it is not illegal changes to use. Protect the security of information transmission and either two ways: exclusive and independent access encrypted information. Before a way to let the lack should not be, the latter should not be the way to get the do not know. Ether virtual private work switching technology has bee a basic work dedicated channel technology, already very mature and widely used. Ether can easily access will require isolation from. Inter information is encrypted TCP / IP on the basic nothing to do with the application of information processing methods. Prior to the issue of information is encrypted with information to carry out the use of declassified after treatment. Now basically an open encryption algorithms, do not rely on secret encryption guarantees, but by password (key). Information security key to the final and most important factor is the holder of the password。s first LAN standard. 1983 IEEEE802 Committee DIX EtherV2 based introduced IEEE803, using the CSMA / CD MAC technology. refer to a CSMA / CD works, and Ether DIX EtherV2 from the standard definition, not strictly in the circumstances, can be called LAN, which is Ether. To the modern manufacturing industry as an example, its modern manufacturi ng automation model in Figure Industrial Ether is the mercial application of Ether to industrial control systems, the two works is not essentially different from, the two are patible. (2) CSMA / CD (Carrier Sense Multiple Access with Collision Detection Multicarrier monitoring visit / conflict detection) CSMA / CD are the first improvement es from CSMA. ① CSMA (Carrier monitor multiple access): stop trying to send a signal, first of all to monitor bus, to determine whether there is other media, to stop the signal. ? If the media is free, you can send。以工業(yè)以太網(wǎng)為核心的測(cè)控技術(shù)是測(cè)控領(lǐng)域中的一個(gè)重要發(fā)展方向，但其實(shí)時(shí)性、可靠性、安全性、互操作性等尚需進(jìn)一步研究完善。 (3) ENC 系統(tǒng)特點(diǎn) ① 實(shí)現(xiàn)信息網(wǎng)絡(luò)與控制網(wǎng)絡(luò)統(tǒng)一 取消控制網(wǎng)與信息網(wǎng)的界限，控制信息化。除此之外還提供 CDMA/GRPS 無線網(wǎng)關(guān)接口，例如系統(tǒng)報(bào)警信息即可通過該網(wǎng)關(guān)接口直接發(fā)送到手機(jī)上，并可通過手機(jī)對(duì)系統(tǒng)進(jìn)行控制。以太網(wǎng)可以很方便的將需要的通道隔離出來。因此 IEEE 標(biāo)準(zhǔn)呼之即出，已形成一個(gè)以太網(wǎng)供電的國際標(biāo)準(zhǔn)，目前 3COM、華為、 DLINK 等公司都有符合 標(biāo)準(zhǔn)的交換機(jī)產(chǎn)品。交換型的以太網(wǎng)中采用以太網(wǎng)交換機(jī)，交換機(jī)各端口之間同時(shí)可以形成多個(gè)數(shù)據(jù)通道，每個(gè)端口可連一個(gè)網(wǎng)段，端口之間幀的輸入和輸出不再受 CSMA/CD