| Electronic no-parking roadblock system is electronic management system, which integrates many technologies, such as communication, automation, database and computer networking etc. It judges the vehicle data through the system platform, then auto-control the roadblock for vehicle to pass. It not only provides reference for road traffic and entrance guard management system, but also is used for the road fee management.The main issue of the task is to design an electronic no-parking roadblock system, which composes of the vehicle carrying equipment, the road-block inspector and computer interface. In this system, the vehicle carrying equipment is a device to send the vehicle information, which includes its number and the vehicle number etc. At the same time it communicates with the roadblock inspector to provide the credible massage. So every vehicle must be equipped with one. The roadblock inspector is the intercommunication between vehicle equipment and computer system. It continually sends patrolling massage around, and then gets the response of the passing vehicle and transmits them to computer. It also can confirm the state of the baluster by the massages. Moreover the computer interface mainly carries out the setting of many aspects.The article chooses the radio frequency technology and GPRS communication, which can make up the shortcoming of the IC card and magcard system. The SIM100-E is chosen to be the principal part of GPRS module, and the CPU is W77E58 which has two enhanced full duplex serial ports. Otherwise, FC-201/SP and AT89C2051 are used for the communication and CPU respectively. In addition, the computer interface is designed by VC++ 6.0 program language which has formidable function. And it can solve the problem of the serial communication and database. This system fulfills the anticipation desire and acquires best effect through the trial. |
