Collision Warning Study and Report Optimization of GPS Monitoring System
|Course||Communication and Information System|
|Keywords||GPS monitoring system Intelligent transportation Collision warning system Reports optimization|
In this work, we research and design a low-cost collision warning system based on GPS technique, which will be used in vehicle convoys. Such a system is an important part of Intelligent Transportation System (ITS), which combines the techniques of GPS, GPRS, GIS, computer network communication technology, information management technology, graph theory and so on. It has important meaning on the exchange of vehicle monitoring and navigation as well as ensuring the safty of moving vehicles. Concerning on the rear-end collision in vehicle convoys, this system can have degraded performance in these situations. This thesis proposes a collision warning system that is based on a GPS receiver and wireless network for transferring data between convoy vehicles. In order to meet the accuracy requirements outlined by others for successful collision avoidance, this work focuses on improving the vehicle velocity measurements which are not sufficient by themselves. The GPS receiver measurements are fused with readings from a MEMS accelerometer. The results of this thesis show that with this type of data fusion, a low-cost GPS-based collision warning system is both feasible in terms of meeting accuracy requirements of collision avoidance systems. Following is our main research:1 we present a literature review of previous research done in the area of collision avoidance algorithms and the necessary requirements for a successful collision avoidance system. Existing commercial systems are examined as well;2 We give an introduction to Global Positioning System (GPS) and its functionality. The collision warning system proposed in this thesis relies on GPS measurements, so knowledge of how GPS operates is beneficial;3 We research the implementation of the key technology in the system, including map browsing, position determination, information inquiring, functional management of monitoring system and reports optimization;4 We outline the collision warning system that is proposed to address the problem of rear-end collisions in military vehicle convoys. The concept of the proposed system is presented, along with its theory of operation and intended advantages over existing systems. We concludes with the construction of a prototype system to use for field testing.