Remote Controlling Base On Internet

In these years, with the application of Internet widely, the technology of computer and Internet have made quiet great development, it also promotes the development of some correlative technologies, of which the technology of remote controlling has become more and more important, for example, it has much importance in handling official business at home, remote teaching, industrial controlling, etc. Thus, it is very important of studying how to realize the technology of remote controlling in the environment of Internet or local area network.This research of this thesis focuses on how to realize the technology of remote controlling, the realization of this technology is involved in three parts: net communication, digital graph, the security of data transmission. The thesis discussed how to realize the above-mentioned technologies in the remote controlling. So the thesis has five parts.The first part is introduction. At the beginning, we have a survey on remote controlling, including its conception, working theory, work mode and its characteristic. Then the problem needed solving and the work needed doing are brought forward base on a controlling system. At last the present research situation and the importance of research are discussed.The second part focuses on the technology of net communication. Firstly we introduce the fundamental concept and principle of net communication including Windows Sockets criterion, Socket, work mode-Client/Server, so we can know something about the net communication. Then, we give a brief analysis about three ways and means of realizing net communication, of which we focus on using the class-C Socket to realize the net communication.The third part firstly introduces some knowledge about digital graph, which includes the following introduction of BMP graph file and JPEG graph file. Secondly, we introduce the screen sharing technology including its conception, theory, realization. And based on the knowledge of BMP graph file, we realize the technology of screen sharing. Lastly, we make the father research about the standard about JPEG, including its theory, arithmetic, and realization. The part focuses on realizing the screen sharing technology.The fourth part discusses the security problem about data transmission. At the first place, it tells us many kinds of treat and damage can happen in the net, what the reason of such treat and damage are, and how to prevent these treat from happening. At the second place, we introduce two security technology-IPSec protocol and SSL protocol, including their work theory, characteristic, function, etc. At the last place, we research which treat and damage exist in the remote controlling, an how to prevent them fromhappening.The fifth part introduces the design and realization of green fruit machining computer control system, combining above-mentioned three parts and the project setting, and based on the control system, discusses the design scheme of remote controlling of it.In the last, we have a summery on the thesis-remote controlling technology, and look into the prospect of solving remote controlling problems.