Collecting the parking information accurately and making good use of the existing parking spaces are keys to solve the problem of parking difficulty. Thus, the parking system based on internet of things technology was proposed. It used a geomagnetic sensor to collect the information of parking space and transmitted the information to the management center by using zigbee wireless communication technology. The center would release the information on the Internet. Via the website, vehicle owners could find a suitable parking space for their vehicle and know the shortest path to this parking. People can conveniently and accurately know the various information of each parking lot with the help of the system. Therefore, this system can effectively solve the problem of parking by monitoring and managing the parking information. It provides access to make good use of each parking space and improve urban transportation.

No abstract

We aim to invent a supervisory control system of vehicles based on Java NIO. As we know, it needs to connect a large number of client terminals to accomplish the function of the vehicle supervisory control system and if the server is developed by the traditional blocking I/O, severe blocking problem will appear. To solve the problem, the traditional server has to distribute one thread for each client, which leads to system overload and reduces the servers high-performance. The new supervisory control system which we invent, however, can solve this problem effectively by the use of asynchronous input and output mechanisms provided by the new non-blocking I/O. The new server can manage a large number of socket communications with a single thread, reducing the system overhead and improving the servers performance.

No abstract

On the basis of GPS module, MP3 module and GPRS module, we aim at designing a bus station reporter developed by the interrupt system of ATmega128. This kind of reporter can make use of the rich interrupt sources provided by ATmega128 to accomplish the functions like receiving and sending the longitude and latitude data, announcing voice messages etc and deal with the reporter’s multifunction, which MCU cannot accomplish at the same time. In addition, the use of interrupt system can greatly simplify the programming, reducing its difficulty and at the same time, it is more convenient for the reporter to expand its functions.