The design of embedded vehicle-mounted anti-collision system

The technology of GPS, Radio Communication, and an Embedded System are used to design a vehicle-mounted anti-collision device in the paper. Its core CPU is the 32-bit ARM11 microprocessor, named S3C6410 that processes information in the system. The circuit system consists of 8 functional modules, of which the circuit diagram is presented in the paper, and the system´s principle working and the function of every module are illustrated. WINCE6.0 is selected as ARM11´S operating system because a GPS navigation program with map will be running. The GPS information of a car is transmitted to the other car by an RF module, of which ECCM is enhanced by some measures of electromagnetic shielding. Then, in order to get the position of cars, a position judgment algorithm is presented based on the theory that a curve between two points in the range of 50m is similar to a line seen from the Earth, and based on the control of the updated GPS data, an algorithm that allows wrong position broadcasting to disappear is also presented to resolve the problem of broadcasting the wrong position. At last, the functions of the device meet the expected requirements through testing.