Research On Safety Assistant Lane Change Pre-warning System Of Automobile Driving On Highway

In recent years, with the development of China's national economic, the construction of our country's highway has been a great development. However, as the rapid growth of the amount of automobile and the improvement of the speed of vehicles on highway, traffic accidents happen frequently, and road safety, road smooth become a very complex social problem. Although the traffic accidents caused by lane change account a small percentage of the total accidents, but the delay caused by this kind of accident account a large part of the whole delay caused by all kinds of accidents. It seriously affect the efficiency of the road transport, and have a very negative impact of the national economy. As a very important measure which can improve the traffic safety, advance driver lane change assistant system caused a widespread concern. In foreign countries, there are many scientific research institutes and companies have invested a great deal of manpower and resources on this field, and had made many important achievements. But in our country, there are no company or scientific research institutes invest any resources.Because of the complexity of lane changing and the restriction of traffic safety management on vehicles, there is not any modeling method successfully applied on vehicle development and traffic accident avoidance as yet, the lane change warning system has not been used successfully on the automobile. So safety warning and collision warning are the most useful technology. To sum up, facing on the problem which caused by lane change in our country, basic on the study of our group in the field of lane departure warning system, in this paper , we make some research on safety lane change assistant system.The following research work has been done:1. we illustrate the research situation in the field of lane-changing model, then put forward the conditions which can make the vehicles avoid accident. Basic on this, we built automobile lane change model. After analysis, we found that our model can fully reflect the operating characteristics of the driver.2. Using Matlab to built the simulation platform which faced on our model. Then we made a simulation of our model on this platform. Through the simulation and contrasting with an other model, we find that our model have some advantages, such as lane-changing time is much shorter, velocity has no sharply change, very suitable for a comfort driving.3. According to the safety evaluation indicators which Suzanne E.Lee put forward when studying the urgency of lane change, we divide the safety grade into three level. They are respectively the red, the green and yellow. Then we modify the driver's habits in the field of evaluation logic processes, developed a more reasonable logic processes. At last, we established a human- machine interface.4. We study the current sensor performance which used on model vehicle, and then introduced the effect and the location of the installation. Then , we formulate the multi-sensor fusion technology advantages. After that , we choice the best coordinated scheme——the CCD and microwave radar. Based on the study of the lane departure warning system, The paper established the safety lane change warning system. It is constructed by vehicle condition detection system, environment perception system, safety assessment system and human-machine interface. We design the microwave radar system which use in surveying the distance between vehicles. Then a experiment had been done to test the system.These results together with appropriate sensors and equipment on board of vehicles could be used to assess the safety of lane changing maneuvers and provide warnings or take evasive actions to avoid collision.