The invention discloses a vehicle rear-end collision early warning method based on layered COX. The method is characterized in that firstly, the vehicle state information and the road environment information are obtained based on natural driving experiment data, and the response delay time of a driver is recognized; whether the data meets the PH hypothesis or not is determined, and a model coefficient is estimated; vehicle states and road environment data in actual driving procedures are acquired on the basis of the internet of vehicles and are substituted into calibrated COX or layered COX models to obtain driver response delay time probability distribution; TTC is calculated, the size relation between TTC and the driver response delay time is judged, the probability that the driver response delay time is larger than the TTC in the current state is given according to the probability distribution estimation result, and early warning is given. The method is advantaged in that compared with an existing TTC-based rear-end collision risk judgment method, influence of objective factors on the response delay time of a driver is considered, the probability of a rear-end collision accidentcan be given, and the method can be applied to an auxiliary driving system of the Internet of Vehicles.

    本发明公开了一种基于分层COX的车辆追尾预警方法,首先基于自然驾驶实验数据获取车辆状态信息、道路环境信息并识别驾驶员反应延迟时间。然后判断数据是否满足PH假设,并估计模型系数。基于车联网获取实际驾驶过程中的车辆状态及道路环境数据,代入已标定的COX或分层COX模型,得到驾驶员反应延迟时间概率分布。计算TTC并判断TTC与驾驶员反应延迟时间的大小关系,参照概率分布估计结果给出当前状态下驾驶员反应延迟时间大于TTC的概率,并作出预警。相比目前基于TTC的追尾风险判断方法,本发明考虑客观因素对驾驶员反应延迟时间的影响,并可给出发生追尾事故的概率。发明可运用于车联网的辅助驾驶系统中。


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    Title :

    Vehicle rear-end collision early warning method based on layered COX


    Additional title:

    一种基于分层COX的车辆追尾预警方法


    Contributors:
    CHENG JINSHENG (author) / SONG CANCAN (author) / SUN ZHI (author) / GUO ZHONGYIN (author) / LIU QIJIE (author) / CHENG CUNYU (author) / ZHANG YANNING (author) / FAN XIANGXI (author) / ZHANG AIDONG (author) / MENG LINGXIAO (author)

    Publication date :

    2020-07-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr



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