Design And Exploitation Of An Intelligent Access Control System For The Lab

The subject in the paper is an important part of the research project contributing to monitor working states of the large scientific instruments, which is organized by the Ministry of Science and Technology of the People's Republic of China.But there is a problem that many of the large scientific instruments can't be preengaged on the Internet.,so we can't use them effiently.In order to solve this problem,we can refer to a intelligent access control system.However many kinds of the intelligent access control system are used in jail,cashbox of bank,channels of airport and computer's room.There is not any one for the assistant management of the large scientific instruments on sale.In face of this situation,the paper puts forward a project of a intelligent access control system aimming at the management of the large scientific instruments,that is: Allowing just one user to enter the lab everytime,the access controller notes the in and out time.in case the computer is out of work.There are two methords to control the access system.One is IC card,the other is GSM.The second way is spare avoiding any manmade possibility that IC identifying instrument. is damaged.LPC2220 is the hardware's mainbody in charge of controlling the access system,the engine TC35i, IC identifying instrument and communicating with PC.The engine TC35i is used to receive the command"open"or"close"whice is emited by user's mobile.For LD102TB sending RS-232 singal,it can be connected with LPC2220's UART with the help of a electric converting chip.Considering the distance between the access controller and PC,an interface RS-485 for communicating be left.Toward the software system on PC,it has produced the main routine,communication setting module,user's data setting module,accessing information module and so on.Using VB6.0,combining SQL2000 database programming software adopting the fabric of'C/S'—'Client/Server',the developing for software system is carried on.Its client of the system is the window facing the user.Most function of the system is implemented in this part while the existence of the sever is the storage of the dealing record,which is to say the data mine of the C/S system.