A Rear View Camera Based Tailgate Warning System
On-vehicle rear view cameras have been widely in the market. Main purpose of rear view camera is to provide the driver with a good view to rear scenes, especially the blind spot areas. Rear view camera is automatically turned on when reverse gear is engag
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Abstract On-vehicle rear view cameras have been widely in the market. Main purpose of rear view camera is to provide the driver with a good view to rear scenes, especially the blind spot areas. Rear view camera is automatically turned on when reverse gear is engaged and turned off when vehicle moves forward. In general, a rear view camera is only used in back-over and parking manoeuvres. In most of driving scenarios, a vehicle moves forward and the rear view camera stays idle and not used. In this paper, rear-end pre-crash safety system utilizing onvehicle rear view camera is presented. The system detects vehicles approaching from behind and calculate TTC (time to collision) of approaching vehicle to host vehicle. Based on the calculated TTC, if the system judges that there is high possibility of collision, the system can give a warning to approaching vehicle by flashing hazard light. In addition, the system can also issue a warning to the driver of host vehicle and automatically take some actions to minimize injury caused by collision. For example, pre-tensing seat belt, move headrests forward etc.
Keywords Active safety Rear pre-crash Vehicle detection Tailgate warning Intelligent vehicle Rear view camera
F2012-F05-007 C. Sun (&) G. Ma Y. Zeng X. Song Advanced Product Development, Delphi (China) Technical Centre, Shanghai, China M. Dwivedi Algorithm Development Group–Safety and Forewarn, Delphi Electronics & Safety, Bangalore, India
SAE-China and FISITA (eds.), Proceedings of the FISITA 2012 World Automotive Congress, Lecture Notes in Electrical Engineering 197, DOI: 10.1007/978-3-642-33805-2_36, Springer-Verlag Berlin Heidelberg 2013
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1 Introduction Pre-crash safety systems using radar and vision detecting technology have been commercialized in the market. While the primary focus of these systems has been for frontal collisions, rear-end collisions actually have a higher proportion of the traffic accident injuries. According to accident analysis of crashes in Japan [1], rear-end collisions account for only 4 % of fatalities, but approximately 50 % of injuries. In addition, a high proportion (77 %) of rear-end collisions result in neck injury, most of which can be categorized as whiplash injury. The primary cause of rear-end collisions is driver’s poor attention to which caused by distraction ahead when driving, approximately 14 % of accidents occur when the driver is looking forward but make’s misjudgement by carelessness. In this paper, a new pre-crash safety system for rear-end collisions is explained. It was developed to help alert drivers of vehicles approaching from behind, and also to reduce whiplash injury. This new system uses existing rear view camera installed in the rear bumper to detect a vehicle approaching closely from behind during front driving. If it judged that there is high risk of collision, the hazard lights would flash to warn the driver of the approaching vehicle and the headrests are automatically moved forward, thereby reducing the risk
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