Research And Realization Of The Data Stream Based On Internet Embedded Web Server

Nowadays is an information age that constructed on network. According to the stat, the area of the operations in the net is enlarging .Diversified new operations except traditional information search,e_mail, such as long-distance stakeout,long_distance teach and long-distance medical treatment and so on have developed flourishly. Along with the thorough research of the Web technic, the technic of the embedded server will has an abroad application in the long-distance stakeout and produce process _control system.This dissertation analysed and introduced embedded Web server technic and data management system in the embedded Web server, and the characteristic of the expoldeing and developing item. It brings forward an applied example which using the embedded Web server long_distance stakeouts the local industry produce and discuse it's applied foreground in the long_distance stakeout syetem.This text introduces the concept,characteristic and the challenge in facing of the design of the embedded data management system at first .And then analyses the basic ideal and the status of the data system in the item that based on developing and expoldering assignment. In this item, one of the most charactericses is expoldering PC stakeout inteface with ourselves configuration sofeware which using VC++6.0 sofeware expoldering flat, but not using network.This dissertation analysed and introduced the datas sourses and memory forms those should memory in the embedded web server also, and the net communications from the dadas to the PC stakeouts interface. It also analysed and introduced the serial communication from the dadas to the stakeouts objects. Through analysing and researching, there are three data types should memory in the embedded Web server. These types are user stakeout interface information, stakeout object information, and PLC equipment element data information. The user stakeout interface information is created in the PC configurarion software stakeout interface create circumstance in the form of file, which mainly includes user stakeout interface correlative information. This information is used to revert the stakeout interface through downloading by the user. The stakeout object information is distilled from the user stakeout interface information, which concludes and centralizes the long-distance stakeout objects information. The information assists data buffer distributing in the server, which is in the form of flie too. The PLC equipment element data information is storaged in the separate data buffer of the embedded web server. The embedded web srever marks off data buffer based on the material stakeout objects information, and then storage the stakeout objects real time data gathered from the industry locale. The user use this information to stakeout the objects. PC stakeout interface and embedded Web server may socket communication through net; embedded Web server and PLC long-distance stakeout object equipment element may serial communication through serial if we have the material definition and memory mode of datas information. All this has done, long-distance user can stakeout the industry local automation process equipment through Internet net.