The Research And Realization Of GPS And Wireless Communication Technology Of Vehicle Travelling Data Recorder

As the fast development of the city transportation, the quantity of the motor vehicle is also increasing continuously. This must cause the crowd situation of the city transportation more serious. So the vehicle travelling data recorder is more and more concern by people. The usage of the common vehicle travelling data recorder plays an important role in restricting the bad driving, guaranteeing the safety of vehicle driving, analyzing road transportation accident and constraining transportation peccancy of the fatigue driving and the over-speed, etc. The high-level vehicle travelling data recorder imports GPS and GPRS at the base of the common one. It can detect the vehicle position and send out data to the remote monitor center wirelessly. Then it can combine the user, vehicle and road tightly through the software of the remote monitor center. It not only solves the traffic jam effectively, but also benefits for emergency solution of traffic accidents, environment protection and economizing energy, etc.This subject is importing GPS and GPRS in the common vehicle travelling data recorder. Considering the relation of the system performance and later operation fare in the design, we use a scheme based on wireless data transportation of IP and INTERNET. It not only can guarantee the communication quality between the vehicle termination and the monitor center, but also has many excellences such as high transportation speed, low operation cost, and so on. And it also fits for frequent little data transportation of monitor system on the vehicle.The paper includes five sections:Briefly introduces the vehicle travelling data recorder, actuality and development trend of domestic and overseas intellect transportation system and the application of GPS and GPRS technology in the whole monitor system on the vehicle.Discusses the design scheme of GPS and GPRS subsystem and hardware design of the subsystem in detail, and briefly introduces developing tools used in the subsystem debug.Introduces the software design of GPS system.Introduces the SMS design and discusses the features of GPRS network and the design scheme of the SMS on the vehicle.Discusses the scheme based on wireless data transportation of IP and INTERNET. It is the emphasis and difficulty of the subject, which introduces kinds of the network protocol such as PPP, IP, TCP, UDP firstly and discusses key technology of accessing the INTERNET by TCP/IP through combining the program and flow chart.