Design And Implementation Of Patrol Systems Based On Proximity Cards

With development of economy and improving of people's living level, people have greater importance on safety, patrol systems develop on this circumstances. Traditional patrol systems run in manual way, it's difficult to manage. In order to prevent various man-made errors and manage easily, it is absolutely necessary to set up a set of modern intelligent patrol systems. With the development of science and technology, intelligent patrol system is a kind of important measure in the modern management. Today, we have come into the information world and computer application systems have already penetrated each corner of our society. Therefore, it is an important task to set up the management information system of stakeout in the management of real estate, which is all-directions, tier and high-efficiency. Furthermore, a patrol system is an important part in it.With the background, the application of Proximity Card in a patrol system is introduced. With Visual Basic as proscenium development tool and SQL Server as the operation database of backstage supporter, the full software about Patrol Management System is developed all alone on the basis of proximity card's strong advantages. The Patrol System introduced by this paper has preferable expansibility.Firstly, the knowledge and work principles, which are related to the Patrol System of Proximity Card, are introduced in the paper. According to requirements, a project to Patrol System is set forth in detail. Secondly, the communications flow of computer is introduced according to the analysis of serial communication protocols. And the protocols between computer's serial port and controller's communication interface is encapsulated as Dynamic Link Libraries in order to be applied to application. Lastly, on the basis of software modularization, the realization of some modules is explained in detail, such as, real-time control and alarm, management of rights, setting of controller's parameter, management of card and person, query and report, system maintenance.Finally, system security is demonstrated from hardware and software.